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NAME
gl - Erlang wrapper functions for OpenGL
DESCRIPTION
Standard OpenGL API
This documents the functions as a brief version of the complete OpenGL reference pages.
DATA TYPES
clamp() = float()
offset() = integer() >= 0
i() = integer()
f() = float()
enum() = integer() >= 0
matrix() = m12() | m16()
m12() =
{f(), f(), f(), f(), f(), f(), f(), f(), f(), f(), f(), f()}
m16() =
{f(),
f(),
f(),
f(),
f(),
f(),
f(),
f(),
f(),
f(),
f(),
f(),
f(),
f(),
f(),
f()}
mem() = binary() | tuple()
EXPORTS
accum(Op :: enum(), Value :: f()) -> ok
The accumulation buffer is an extended-range color buffer. Images are not rendered
into it. Rather, images rendered into one of the color buffers are added to the
contents of the accumulation buffer after rendering. Effects such as antialiasing
(of points, lines, and polygons), motion blur, and depth of field can be created by
accumulating images generated with different transformation matrices.
External documentation.
activeShaderProgram(Pipeline :: i(), Program :: i()) -> ok
gl:activeShaderProgram/2 sets the linked program named by Program to be the active
program for the program pipeline object Pipeline. The active program in the active
program pipeline object is the target of calls to gl:uniform() when no program has
been made current through a call to gl:useProgram/1.
External documentation.
activeTexture(Texture :: enum()) -> ok
gl:activeTexture/1 selects which texture unit subsequent texture state calls will
affect. The number of texture units an implementation supports is implementation
dependent, but must be at least 80.
External documentation.
alphaFunc(Func :: enum(), Ref :: clamp()) -> ok
The alpha test discards fragments depending on the outcome of a comparison between
an incoming fragment's alpha value and a constant reference value. gl:alphaFunc/2
specifies the reference value and the comparison function. The comparison is
performed only if alpha testing is enabled. By default, it is not enabled. (See
gl:enable/1 and gl:disable/1 of ?GL_ALPHA_TEST.)
External documentation.
areTexturesResident(Textures :: [i()]) ->
{0 | 1, Residences :: [0 | 1]}
GL establishes a ``working set'' of textures that are resident in texture memory.
These textures can be bound to a texture target much more efficiently than textures
that are not resident.
External documentation.
arrayElement(I :: i()) -> ok
gl:arrayElement/1 commands are used within gl:'begin'/1/gl:'end'/0 pairs to specify
vertex and attribute data for point, line, and polygon primitives. If
?GL_VERTEX_ARRAY is enabled when gl:arrayElement/1 is called, a single vertex is
drawn, using vertex and attribute data taken from location I of the enabled arrays.
If ?GL_VERTEX_ARRAY is not enabled, no drawing occurs but the attributes
corresponding to the enabled arrays are modified.
External documentation.
attachShader(Program :: i(), Shader :: i()) -> ok
In order to create a complete shader program, there must be a way to specify the
list of things that will be linked together. Program objects provide this
mechanism. Shaders that are to be linked together in a program object must first be
attached to that program object. gl:attachShader/2 attaches the shader object
specified by Shader to the program object specified by Program. This indicates that
Shader will be included in link operations that will be performed on Program.
External documentation.
'begin'(Mode :: enum()) -> ok
'end'() -> ok
gl:'begin'/1 and gl:'end'/0 delimit the vertices that define a primitive or a group
of like primitives. gl:'begin'/1 accepts a single argument that specifies in which
of ten ways the vertices are interpreted. Taking n as an integer count starting at
one, and N as the total number of vertices specified, the interpretations are as
follows:
External documentation.
beginConditionalRender(Id :: i(), Mode :: enum()) -> ok
endConditionalRender() -> ok
Conditional rendering is started using gl:beginConditionalRender/2 and ended using
gl:endConditionalRender/0. During conditional rendering, all vertex array commands,
as well as gl:clear/1 and gl:clearBuffer() have no effect if the
(?GL_SAMPLES_PASSED) result of the query object Id is zero, or if the
(?GL_ANY_SAMPLES_PASSED) result is ?GL_FALSE. The results of commands setting the
current vertex state, such as gl:vertexAttrib() are undefined. If the
(?GL_SAMPLES_PASSED) result is non-zero or if the (?GL_ANY_SAMPLES_PASSED) result
is ?GL_TRUE, such commands are not discarded. The Id parameter to
gl:beginConditionalRender/2 must be the name of a query object previously returned
from a call to gl:genQueries/1. Mode specifies how the results of the query object
are to be interpreted. If Mode is ?GL_QUERY_WAIT, the GL waits for the results of
the query to be available and then uses the results to determine if subsequent
rendering commands are discarded. If Mode is ?GL_QUERY_NO_WAIT, the GL may choose
to unconditionally execute the subsequent rendering commands without waiting for
the query to complete.
External documentation.
beginQuery(Target :: enum(), Id :: i()) -> ok
endQuery(Target :: enum()) -> ok
gl:beginQuery/2 and gl:endQuery/1 delimit the boundaries of a query object. Query
must be a name previously returned from a call to gl:genQueries/1. If a query
object with name Id does not yet exist it is created with the type determined by
Target. Target must be one of ?GL_SAMPLES_PASSED, ?GL_ANY_SAMPLES_PASSED,
?GL_PRIMITIVES_GENERATED, ?GL_TRANSFORM_FEEDBACK_PRIMITIVES_WRITTEN, or
?GL_TIME_ELAPSED. The behavior of the query object depends on its type and is as
follows.
External documentation.
beginQueryIndexed(Target :: enum(), Index :: i(), Id :: i()) -> ok
endQueryIndexed(Target :: enum(), Index :: i()) -> ok
gl:beginQueryIndexed/3 and gl:endQueryIndexed/2 delimit the boundaries of a query
object. Query must be a name previously returned from a call to gl:genQueries/1. If
a query object with name Id does not yet exist it is created with the type
determined by Target. Target must be one of ?GL_SAMPLES_PASSED,
?GL_ANY_SAMPLES_PASSED, ?GL_PRIMITIVES_GENERATED,
?GL_TRANSFORM_FEEDBACK_PRIMITIVES_WRITTEN, or ?GL_TIME_ELAPSED. The behavior of the
query object depends on its type and is as follows.
External documentation.
beginTransformFeedback(PrimitiveMode :: enum()) -> ok
endTransformFeedback() -> ok
Transform feedback mode captures the values of varying variables written by the
vertex shader (or, if active, the geometry shader). Transform feedback is said to
be active after a call to gl:beginTransformFeedback/1 until a subsequent call to
gl:endTransformFeedback/0. Transform feedback commands must be paired.
External documentation.
bindAttribLocation(Program :: i(), Index :: i(), Name :: string()) ->
ok
gl:bindAttribLocation/3 is used to associate a user-defined attribute variable in
the program object specified by Program with a generic vertex attribute index. The
name of the user-defined attribute variable is passed as a null terminated string
in Name. The generic vertex attribute index to be bound to this variable is
specified by Index. When Program is made part of current state, values provided via
the generic vertex attribute Index will modify the value of the user-defined
attribute variable specified by Name.
External documentation.
bindBuffer(Target :: enum(), Buffer :: i()) -> ok
gl:bindBuffer/2 binds a buffer object to the specified buffer binding point.
Calling gl:bindBuffer/2 with Target set to one of the accepted symbolic constants
and Buffer set to the name of a buffer object binds that buffer object name to the
target. If no buffer object with name Buffer exists, one is created with that name.
When a buffer object is bound to a target, the previous binding for that target is
automatically broken.
External documentation.
bindBufferBase(Target :: enum(), Index :: i(), Buffer :: i()) ->
ok
gl:bindBufferBase/3 binds the buffer object Buffer to the binding point at index
Index of the array of targets specified by Target. Each Target represents an
indexed array of buffer binding points, as well as a single general binding point
that can be used by other buffer manipulation functions such as gl:bindBuffer/2 or
glMapBuffer. In addition to binding Buffer to the indexed buffer binding target,
gl:bindBufferBase/3 also binds Buffer to the generic buffer binding point specified
by Target.
External documentation.
bindBufferRange(Target :: enum(),
Index :: i(),
Buffer :: i(),
Offset :: i(),
Size :: i()) ->
ok
gl:bindBufferRange/5 binds a range the buffer object Buffer represented by Offset
and Size to the binding point at index Index of the array of targets specified by
Target. Each Target represents an indexed array of buffer binding points, as well
as a single general binding point that can be used by other buffer manipulation
functions such as gl:bindBuffer/2 or glMapBuffer. In addition to binding a range of
Buffer to the indexed buffer binding target, gl:bindBufferRange/5 also binds the
range to the generic buffer binding point specified by Target.
External documentation.
bindBuffersBase(Target :: enum(), First :: i(), Buffers :: [i()]) ->
ok
gl:bindBuffersBase/3 binds a set of Count buffer objects whose names are given in
the array Buffers to the Count consecutive binding points starting from index First
of the array of targets specified by Target. If Buffers is ?NULL then
gl:bindBuffersBase/3 unbinds any buffers that are currently bound to the referenced
binding points. Assuming no errors are generated, it is equivalent to the following
pseudo-code, which calls gl:bindBufferBase/3, with the exception that the non-
indexed Target is not changed by gl:bindBuffersBase/3:
External documentation.
bindBuffersRange(Target :: enum(),
First :: i(),
Buffers :: [i()],
Offsets :: [i()],
Sizes :: [i()]) ->
ok
gl:bindBuffersRange/5 binds a set of Count ranges from buffer objects whose names
are given in the array Buffers to the Count consecutive binding points starting
from index First of the array of targets specified by Target. Offsets specifies the
address of an array containing Count starting offsets within the buffers, and Sizes
specifies the address of an array of Count sizes of the ranges. If Buffers is ?NULL
then Offsets and Sizes are ignored and gl:bindBuffersRange/5 unbinds any buffers
that are currently bound to the referenced binding points. Assuming no errors are
generated, it is equivalent to the following pseudo-code, which calls
gl:bindBufferRange/5, with the exception that the non-indexed Target is not changed
by gl:bindBuffersRange/5:
External documentation.
bindFragDataLocation(Program :: i(),
Color :: i(),
Name :: string()) ->
ok
gl:bindFragDataLocation/3 explicitly specifies the binding of the user-defined
varying out variable Name to fragment shader color number ColorNumber for program
Program. If Name was bound previously, its assigned binding is replaced with
ColorNumber. Name must be a null-terminated string. ColorNumber must be less than
?GL_MAX_DRAW_BUFFERS.
External documentation.
bindFragDataLocationIndexed(Program :: i(),
ColorNumber :: i(),
Index :: i(),
Name :: string()) ->
ok
gl:bindFragDataLocationIndexed/4 specifies that the varying out variable Name in
Program should be bound to fragment color ColorNumber when the program is next
linked. Index may be zero or one to specify that the color be used as either the
first or second color input to the blend equation, respectively.
External documentation.
bindFramebuffer(Target :: enum(), Framebuffer :: i()) -> ok
gl:bindFramebuffer/2 binds the framebuffer object with name Framebuffer to the
framebuffer target specified by Target. Target must be either ?GL_DRAW_FRAMEBUFFER,
?GL_READ_FRAMEBUFFER or ?GL_FRAMEBUFFER. If a framebuffer object is bound to
?GL_DRAW_FRAMEBUFFER or ?GL_READ_FRAMEBUFFER, it becomes the target for rendering
or readback operations, respectively, until it is deleted or another framebuffer is
bound to the corresponding bind point. Calling gl:bindFramebuffer/2 with Target set
to ?GL_FRAMEBUFFER binds Framebuffer to both the read and draw framebuffer targets.
Framebuffer is the name of a framebuffer object previously returned from a call to
gl:genFramebuffers/1, or zero to break the existing binding of a framebuffer object
to Target.
External documentation.
bindImageTexture(Unit, Texture, Level, Layered, Layer, Access,
Format) ->
ok
Types:
Unit = Texture = Level = i()
Layered = 0 | 1
Layer = i()
Access = Format = enum()
gl:bindImageTexture/7 binds a single level of a texture to an image unit for the
purpose of reading and writing it from shaders. Unit specifies the zero-based index
of the image unit to which to bind the texture level. Texture specifies the name of
an existing texture object to bind to the image unit. If Texture is zero, then any
existing binding to the image unit is broken. Level specifies the level of the
texture to bind to the image unit.
External documentation.
bindImageTextures(First :: i(), Textures :: [i()]) -> ok
gl:bindImageTextures/2 binds images from an array of existing texture objects to a
specified number of consecutive image units. Count specifies the number of texture
objects whose names are stored in the array Textures. That number of texture names
are read from the array and bound to the Count consecutive texture units starting
from First. If the name zero appears in the Textures array, any existing binding to
the image unit is reset. Any non-zero entry in Textures must be the name of an
existing texture object. When a non-zero entry in Textures is present, the image at
level zero is bound, the binding is considered layered, with the first layer set to
zero, and the image is bound for read-write access. The image unit format parameter
is taken from the internal format of the image at level zero of the texture object.
For cube map textures, the internal format of the positive X image of level zero is
used. If Textures is ?NULL then it is as if an appropriately sized array containing
only zeros had been specified.
External documentation.
bindProgramPipeline(Pipeline :: i()) -> ok
gl:bindProgramPipeline/1 binds a program pipeline object to the current context.
Pipeline must be a name previously returned from a call to
gl:genProgramPipelines/1. If no program pipeline exists with name Pipeline then a
new pipeline object is created with that name and initialized to the default state
vector.
External documentation.
bindRenderbuffer(Target :: enum(), Renderbuffer :: i()) -> ok
gl:bindRenderbuffer/2 binds the renderbuffer object with name Renderbuffer to the
renderbuffer target specified by Target. Target must be ?GL_RENDERBUFFER.
Renderbuffer is the name of a renderbuffer object previously returned from a call
to gl:genRenderbuffers/1, or zero to break the existing binding of a renderbuffer
object to Target.
External documentation.
bindSampler(Unit :: i(), Sampler :: i()) -> ok
gl:bindSampler/2 binds Sampler to the texture unit at index Unit. Sampler must be
zero or the name of a sampler object previously returned from a call to
gl:genSamplers/1. Unit must be less than the value of
?GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS.
External documentation.
bindSamplers(First :: i(), Samplers :: [i()]) -> ok
gl:bindSamplers/2 binds samplers from an array of existing sampler objects to a
specified number of consecutive sampler units. Count specifies the number of
sampler objects whose names are stored in the array Samplers. That number of
sampler names is read from the array and bound to the Count consecutive sampler
units starting from First.
External documentation.
bindTexture(Target :: enum(), Texture :: i()) -> ok
gl:bindTexture/2 lets you create or use a named texture. Calling gl:bindTexture/2
with Target set to ?GL_TEXTURE_1D, ?GL_TEXTURE_2D, ?GL_TEXTURE_3D,
?GL_TEXTURE_1D_ARRAY, ?GL_TEXTURE_2D_ARRAY, ?GL_TEXTURE_RECTANGLE,
?GL_TEXTURE_CUBE_MAP, ?GL_TEXTURE_CUBE_MAP_ARRAY, ?GL_TEXTURE_BUFFER,
?GL_TEXTURE_2D_MULTISAMPLE or ?GL_TEXTURE_2D_MULTISAMPLE_ARRAY and Texture set to
the name of the new texture binds the texture name to the target. When a texture is
bound to a target, the previous binding for that target is automatically broken.
External documentation.
bindTextureUnit(Unit :: i(), Texture :: i()) -> ok
gl:bindTextureUnit/2 binds an existing texture object to the texture unit numbered
Unit.
External documentation.
bindTextures(First :: i(), Textures :: [i()]) -> ok
gl:bindTextures/2 binds an array of existing texture objects to a specified number
of consecutive texture units. Count specifies the number of texture objects whose
names are stored in the array Textures. That number of texture names are read from
the array and bound to the Count consecutive texture units starting from First. The
target, or type of texture is deduced from the texture object and each texture is
bound to the corresponding target of the texture unit. If the name zero appears in
the Textures array, any existing binding to any target of the texture unit is reset
and the default texture for that target is bound in its place. Any non-zero entry
in Textures must be the name of an existing texture object. If Textures is ?NULL
then it is as if an appropriately sized array containing only zeros had been
specified.
External documentation.
bindTransformFeedback(Target :: enum(), Id :: i()) -> ok
gl:bindTransformFeedback/2 binds the transform feedback object with name Id to the
current GL state. Id must be a name previously returned from a call to
gl:genTransformFeedbacks/1. If Id has not previously been bound, a new transform
feedback object with name Id and initialized with the default transform state
vector is created.
External documentation.
bindVertexArray(Array :: i()) -> ok
gl:bindVertexArray/1 binds the vertex array object with name Array. Array is the
name of a vertex array object previously returned from a call to
gl:genVertexArrays/1, or zero to break the existing vertex array object binding.
External documentation.
bindVertexBuffer(Bindingindex :: i(),
Buffer :: i(),
Offset :: i(),
Stride :: i()) ->
ok
vertexArrayVertexBuffer(Vaobj :: i(),
Bindingindex :: i(),
Buffer :: i(),
Offset :: i(),
Stride :: i()) ->
ok
gl:bindVertexBuffer/4 and gl:vertexArrayVertexBuffer/5 bind the buffer named Buffer
to the vertex buffer binding point whose index is given by Bindingindex.
gl:bindVertexBuffer/4 modifies the binding of the currently bound vertex array
object, whereas gl:vertexArrayVertexBuffer/5 allows the caller to specify ID of the
vertex array object with an argument named Vaobj, for which the binding should be
modified. Offset and Stride specify the offset of the first element within the
buffer and the distance between elements within the buffer, respectively, and are
both measured in basic machine units. Bindingindex must be less than the value of
?GL_MAX_VERTEX_ATTRIB_BINDINGS. Offset and Stride must be greater than or equal to
zero. If Buffer is zero, then any buffer currently bound to the specified binding
point is unbound.
External documentation.
bindVertexBuffers(First :: i(),
Buffers :: [i()],
Offsets :: [i()],
Strides :: [i()]) ->
ok
vertexArrayVertexBuffers(Vaobj :: i(),
First :: i(),
Buffers :: [i()],
Offsets :: [i()],
Strides :: [i()]) ->
ok
gl:bindVertexBuffers/4 and gl:vertexArrayVertexBuffers/5 bind storage from an array
of existing buffer objects to a specified number of consecutive vertex buffer
binding points units in a vertex array object. For gl:bindVertexBuffers/4, the
vertex array object is the currently bound vertex array object. For
gl:vertexArrayVertexBuffers/5, Vaobj is the name of the vertex array object.
External documentation.
bitmap(Width, Height, Xorig, Yorig, Xmove, Ymove, Bitmap) -> ok
Types:
Width = Height = i()
Xorig = Yorig = Xmove = Ymove = f()
Bitmap = offset() | mem()
A bitmap is a binary image. When drawn, the bitmap is positioned relative to the
current raster position, and frame buffer pixels corresponding to 1's in the bitmap
are written using the current raster color or index. Frame buffer pixels
corresponding to 0's in the bitmap are not modified.
External documentation.
blendColor(Red :: clamp(),
Green :: clamp(),
Blue :: clamp(),
Alpha :: clamp()) ->
ok
The ?GL_BLEND_COLOR may be used to calculate the source and destination blending
factors. The color components are clamped to the range [0 1] before being stored.
See gl:blendFunc/2 for a complete description of the blending operations. Initially
the ?GL_BLEND_COLOR is set to (0, 0, 0, 0).
External documentation.
blendEquation(Mode :: enum()) -> ok
blendEquationi(Buf :: i(), Mode :: enum()) -> ok
The blend equations determine how a new pixel (the ''source'' color) is combined
with a pixel already in the framebuffer (the ''destination'' color). This function
sets both the RGB blend equation and the alpha blend equation to a single equation.
gl:blendEquationi/2 specifies the blend equation for a single draw buffer whereas
gl:blendEquation/1 sets the blend equation for all draw buffers.
External documentation.
blendEquationSeparate(ModeRGB :: enum(), ModeAlpha :: enum()) ->
ok
blendEquationSeparatei(Buf :: i(),
ModeRGB :: enum(),
ModeAlpha :: enum()) ->
ok
The blend equations determines how a new pixel (the ''source'' color) is combined
with a pixel already in the framebuffer (the ''destination'' color). These
functions specify one blend equation for the RGB-color components and one blend
equation for the alpha component. gl:blendEquationSeparatei/3 specifies the blend
equations for a single draw buffer whereas gl:blendEquationSeparate/2 sets the
blend equations for all draw buffers.
External documentation.
blendFunc(Sfactor :: enum(), Dfactor :: enum()) -> ok
blendFunci(Buf :: i(), Src :: enum(), Dst :: enum()) -> ok
Pixels can be drawn using a function that blends the incoming (source) RGBA values
with the RGBA values that are already in the frame buffer (the destination values).
Blending is initially disabled. Use gl:enable/1 and gl:disable/1 with argument
?GL_BLEND to enable and disable blending.
External documentation.
blendFuncSeparate(SfactorRGB, DfactorRGB, SfactorAlpha,
DfactorAlpha) ->
ok
blendFuncSeparatei(Buf :: i(),
SrcRGB :: enum(),
DstRGB :: enum(),
SrcAlpha :: enum(),
DstAlpha :: enum()) ->
ok
Pixels can be drawn using a function that blends the incoming (source) RGBA values
with the RGBA values that are already in the frame buffer (the destination values).
Blending is initially disabled. Use gl:enable/1 and gl:disable/1 with argument
?GL_BLEND to enable and disable blending.
External documentation.
blitFramebuffer(SrcX0, SrcY0, SrcX1, SrcY1, DstX0, DstY0, DstX1,
DstY1, Mask, Filter) ->
ok
Types:
SrcX0 = SrcY0 = SrcX1 = SrcY1 = DstX0 = DstY0 = DstX1 = DstY1 = Mask = i()
Filter = enum()
gl:blitFramebuffer/10 and glBlitNamedFramebuffer transfer a rectangle of pixel
values from one region of a read framebuffer to another region of a draw
framebuffer.
External documentation.
bufferData(Target :: enum(),
Size :: i(),
Data :: offset() | mem(),
Usage :: enum()) ->
ok
gl:bufferData/4 and glNamedBufferData create a new data store for a buffer object.
In case of gl:bufferData/4, the buffer object currently bound to Target is used.
For glNamedBufferData, a buffer object associated with ID specified by the caller
in Buffer will be used instead.
External documentation.
bufferStorage(Target :: enum(),
Size :: i(),
Data :: offset() | mem(),
Flags :: i()) ->
ok
gl:bufferStorage/4 and glNamedBufferStorage create a new immutable data store. For
gl:bufferStorage/4, the buffer object currently bound to Target will be
initialized. For glNamedBufferStorage, Buffer is the name of the buffer object that
will be configured. The size of the data store is specified by Size. If an initial
data is available, its address may be supplied in Data. Otherwise, to create an
uninitialized data store, Data should be ?NULL.
External documentation.
bufferSubData(Target :: enum(),
Offset :: i(),
Size :: i(),
Data :: offset() | mem()) ->
ok
gl:bufferSubData/4 and glNamedBufferSubData redefine some or all of the data store
for the specified buffer object. Data starting at byte offset Offset and extending
for Size bytes is copied to the data store from the memory pointed to by Data.
Offset and Size must define a range lying entirely within the buffer object's data
store.
External documentation.
callList(List :: i()) -> ok
gl:callList/1 causes the named display list to be executed. The commands saved in
the display list are executed in order, just as if they were called without using a
display list. If List has not been defined as a display list, gl:callList/1 is
ignored.
External documentation.
callLists(Lists :: [i()]) -> ok
gl:callLists/1 causes each display list in the list of names passed as Lists to be
executed. As a result, the commands saved in each display list are executed in
order, just as if they were called without using a display list. Names of display
lists that have not been defined are ignored.
External documentation.
checkFramebufferStatus(Target :: enum()) -> enum()
gl:checkFramebufferStatus/1 and glCheckNamedFramebufferStatus return the
completeness status of a framebuffer object when treated as a read or draw
framebuffer, depending on the value of Target.
External documentation.
clampColor(Target :: enum(), Clamp :: enum()) -> ok
gl:clampColor/2 controls color clamping that is performed during gl:readPixels/7.
Target must be ?GL_CLAMP_READ_COLOR. If Clamp is ?GL_TRUE, read color clamping is
enabled; if Clamp is ?GL_FALSE, read color clamping is disabled. If Clamp is
?GL_FIXED_ONLY, read color clamping is enabled only if the selected read buffer has
fixed point components and disabled otherwise.
External documentation.
clear(Mask :: i()) -> ok
gl:clear/1 sets the bitplane area of the window to values previously selected by
gl:clearColor/4, gl:clearDepth/1, and gl:clearStencil/1. Multiple color buffers can
be cleared simultaneously by selecting more than one buffer at a time using
gl:drawBuffer/1.
External documentation.
clearAccum(Red :: f(), Green :: f(), Blue :: f(), Alpha :: f()) ->
ok
gl:clearAccum/4 specifies the red, green, blue, and alpha values used by gl:clear/1
to clear the accumulation buffer.
External documentation.
clearBufferData(Target, Internalformat, Format, Type, Data) -> ok
clearBufferSubData(Target, Internalformat, Offset, Size, Format,
Type, Data) ->
ok
clearBufferfi(Buffer :: enum(),
Drawbuffer :: i(),
Depth :: f(),
Stencil :: i()) ->
ok
clearBufferfv(Buffer :: enum(),
Drawbuffer :: i(),
Value :: tuple()) ->
ok
clearBufferiv(Buffer :: enum(),
Drawbuffer :: i(),
Value :: tuple()) ->
ok
clearBufferuiv(Buffer :: enum(),
Drawbuffer :: i(),
Value :: tuple()) ->
ok
These commands clear a specified buffer of a framebuffer to specified value(s). For
gl:clearBuffer*(), the framebuffer is the currently bound draw framebuffer object.
For glClearNamedFramebuffer*, Framebuffer is zero, indicating the default draw
framebuffer, or the name of a framebuffer object.
External documentation.
clearColor(Red :: clamp(),
Green :: clamp(),
Blue :: clamp(),
Alpha :: clamp()) ->
ok
gl:clearColor/4 specifies the red, green, blue, and alpha values used by gl:clear/1
to clear the color buffers. Values specified by gl:clearColor/4 are clamped to the
range [0 1].
External documentation.
clearDepth(Depth :: clamp()) -> ok
clearDepthf(D :: f()) -> ok
gl:clearDepth/1 specifies the depth value used by gl:clear/1 to clear the depth
buffer. Values specified by gl:clearDepth/1 are clamped to the range [0 1].
External documentation.
clearIndex(C :: f()) -> ok
gl:clearIndex/1 specifies the index used by gl:clear/1 to clear the color index
buffers. C is not clamped. Rather, C is converted to a fixed-point value with
unspecified precision to the right of the binary point. The integer part of this
value is then masked with 2 m-1, where m is the number of bits in a color index
stored in the frame buffer.
External documentation.
clearStencil(S :: i()) -> ok
gl:clearStencil/1 specifies the index used by gl:clear/1 to clear the stencil
buffer. S is masked with 2 m-1, where m is the number of bits in the stencil
buffer.
External documentation.
clearTexImage(Texture :: i(),
Level :: i(),
Format :: enum(),
Type :: enum(),
Data :: offset() | mem()) ->
ok
gl:clearTexImage/5 fills all an image contained in a texture with an application
supplied value. Texture must be the name of an existing texture. Further, Texture
may not be the name of a buffer texture, nor may its internal format be compressed.
External documentation.
clearTexSubImage(Texture, Level, Xoffset, Yoffset, Zoffset, Width,
Height, Depth, Format, Type, Data) ->
ok
Types:
Texture = Level = Xoffset = Yoffset = Zoffset = Width = Height = Depth = i()
Format = Type = enum()
Data = offset() | mem()
gl:clearTexSubImage/11 fills all or part of an image contained in a texture with an
application supplied value. Texture must be the name of an existing texture.
Further, Texture may not be the name of a buffer texture, nor may its internal
format be compressed.
External documentation.
clientActiveTexture(Texture :: enum()) -> ok
gl:clientActiveTexture/1 selects the vertex array client state parameters to be
modified by gl:texCoordPointer/4, and enabled or disabled with
gl:enableClientState/1 or gl:disableClientState/1, respectively, when called with a
parameter of ?GL_TEXTURE_COORD_ARRAY.
External documentation.
clientWaitSync(Sync :: i(), Flags :: i(), Timeout :: i()) ->
enum()
gl:clientWaitSync/3 causes the client to block and wait for the sync object
specified by Sync to become signaled. If Sync is signaled when gl:clientWaitSync/3
is called, gl:clientWaitSync/3 returns immediately, otherwise it will block and
wait for up to Timeout nanoseconds for Sync to become signaled.
External documentation.
clipControl(Origin :: enum(), Depth :: enum()) -> ok
gl:clipControl/2 controls the clipping volume behavior and the clip coordinate to
window coordinate transformation behavior.
External documentation.
clipPlane(Plane :: enum(), Equation :: {f(), f(), f(), f()}) -> ok
Geometry is always clipped against the boundaries of a six-plane frustum in x, y,
and z. gl:clipPlane/2 allows the specification of additional planes, not
necessarily perpendicular to the x, y, or z axis, against which all geometry is
clipped. To determine the maximum number of additional clipping planes, call
gl:getIntegerv/1 with argument ?GL_MAX_CLIP_PLANES. All implementations support at
least six such clipping planes. Because the resulting clipping region is the
intersection of the defined half-spaces, it is always convex.
External documentation.
color3b(Red :: i(), Green :: i(), Blue :: i()) -> ok
color3bv(X1 :: {Red :: i(), Green :: i(), Blue :: i()}) -> ok
color3d(Red :: f(), Green :: f(), Blue :: f()) -> ok
color3dv(X1 :: {Red :: f(), Green :: f(), Blue :: f()}) -> ok
color3f(Red :: f(), Green :: f(), Blue :: f()) -> ok
color3fv(X1 :: {Red :: f(), Green :: f(), Blue :: f()}) -> ok
color3i(Red :: i(), Green :: i(), Blue :: i()) -> ok
color3iv(X1 :: {Red :: i(), Green :: i(), Blue :: i()}) -> ok
color3s(Red :: i(), Green :: i(), Blue :: i()) -> ok
color3sv(X1 :: {Red :: i(), Green :: i(), Blue :: i()}) -> ok
color3ub(Red :: i(), Green :: i(), Blue :: i()) -> ok
color3ubv(X1 :: {Red :: i(), Green :: i(), Blue :: i()}) -> ok
color3ui(Red :: i(), Green :: i(), Blue :: i()) -> ok
color3uiv(X1 :: {Red :: i(), Green :: i(), Blue :: i()}) -> ok
color3us(Red :: i(), Green :: i(), Blue :: i()) -> ok
color3usv(X1 :: {Red :: i(), Green :: i(), Blue :: i()}) -> ok
color4b(Red :: i(), Green :: i(), Blue :: i(), Alpha :: i()) -> ok
color4bv(X1 ::
{Red :: i(), Green :: i(), Blue :: i(), Alpha :: i()}) ->
ok
color4d(Red :: f(), Green :: f(), Blue :: f(), Alpha :: f()) -> ok
color4dv(X1 ::
{Red :: f(), Green :: f(), Blue :: f(), Alpha :: f()}) ->
ok
color4f(Red :: f(), Green :: f(), Blue :: f(), Alpha :: f()) -> ok
color4fv(X1 ::
{Red :: f(), Green :: f(), Blue :: f(), Alpha :: f()}) ->
ok
color4i(Red :: i(), Green :: i(), Blue :: i(), Alpha :: i()) -> ok
color4iv(X1 ::
{Red :: i(), Green :: i(), Blue :: i(), Alpha :: i()}) ->
ok
color4s(Red :: i(), Green :: i(), Blue :: i(), Alpha :: i()) -> ok
color4sv(X1 ::
{Red :: i(), Green :: i(), Blue :: i(), Alpha :: i()}) ->
ok
color4ub(Red :: i(), Green :: i(), Blue :: i(), Alpha :: i()) ->
ok
color4ubv(X1 ::
{Red :: i(),
Green :: i(),
Blue :: i(),
Alpha :: i()}) ->
ok
color4ui(Red :: i(), Green :: i(), Blue :: i(), Alpha :: i()) ->
ok
color4uiv(X1 ::
{Red :: i(),
Green :: i(),
Blue :: i(),
Alpha :: i()}) ->
ok
color4us(Red :: i(), Green :: i(), Blue :: i(), Alpha :: i()) ->
ok
color4usv(X1 ::
{Red :: i(),
Green :: i(),
Blue :: i(),
Alpha :: i()}) ->
ok
The GL stores both a current single-valued color index and a current four-valued
RGBA color. gl:color() sets a new four-valued RGBA color. gl:color() has two major
variants: gl:color3() and gl:color4(). gl:color3() variants specify new red, green,
and blue values explicitly and set the current alpha value to 1.0 (full intensity)
implicitly. gl:color4() variants specify all four color components explicitly.
External documentation.
colorMask(Red :: 0 | 1,
Green :: 0 | 1,
Blue :: 0 | 1,
Alpha :: 0 | 1) ->
ok
colorMaski(Index :: i(),
R :: 0 | 1,
G :: 0 | 1,
B :: 0 | 1,
A :: 0 | 1) ->
ok
gl:colorMask/4 and gl:colorMaski/5 specify whether the individual color components
in the frame buffer can or cannot be written. gl:colorMaski/5 sets the mask for a
specific draw buffer, whereas gl:colorMask/4 sets the mask for all draw buffers. If
Red is ?GL_FALSE, for example, no change is made to the red component of any pixel
in any of the color buffers, regardless of the drawing operation attempted.
External documentation.
colorMaterial(Face :: enum(), Mode :: enum()) -> ok
gl:colorMaterial/2 specifies which material parameters track the current color.
When ?GL_COLOR_MATERIAL is enabled, the material parameter or parameters specified
by Mode, of the material or materials specified by Face, track the current color at
all times.
External documentation.
colorPointer(Size :: i(),
Type :: enum(),
Stride :: i(),
Ptr :: offset() | mem()) ->
ok
gl:colorPointer/4 specifies the location and data format of an array of color
components to use when rendering. Size specifies the number of components per
color, and must be 3 or 4. Type specifies the data type of each color component,
and Stride specifies the byte stride from one color to the next, allowing vertices
and attributes to be packed into a single array or stored in separate arrays.
(Single-array storage may be more efficient on some implementations; see
gl:interleavedArrays/3.)
External documentation.
colorSubTable(Target, Start, Count, Format, Type, Data) -> ok
Types:
Target = enum()
Start = Count = i()
Format = Type = enum()
Data = offset() | mem()
gl:colorSubTable/6 is used to respecify a contiguous portion of a color table
previously defined using gl:colorTable/6. The pixels referenced by Data replace the
portion of the existing table from indices Start to start+count-1, inclusive. This
region may not include any entries outside the range of the color table as it was
originally specified. It is not an error to specify a subtexture with width of 0,
but such a specification has no effect.
External documentation.
colorTable(Target, Internalformat, Width, Format, Type, Table) ->
ok
Types:
Target = Internalformat = enum()
Width = i()
Format = Type = enum()
Table = offset() | mem()
gl:colorTable/6 may be used in two ways: to test the actual size and color
resolution of a lookup table given a particular set of parameters, or to load the
contents of a color lookup table. Use the targets ?GL_PROXY_* for the first case
and the other targets for the second case.
External documentation.
colorTableParameterfv(Target :: enum(),
Pname :: enum(),
Params :: {f(), f(), f(), f()}) ->
ok
colorTableParameteriv(Target :: enum(),
Pname :: enum(),
Params :: {i(), i(), i(), i()}) ->
ok
gl:colorTableParameter() is used to specify the scale factors and bias terms
applied to color components when they are loaded into a color table. Target
indicates which color table the scale and bias terms apply to; it must be set to
?GL_COLOR_TABLE, ?GL_POST_CONVOLUTION_COLOR_TABLE, or
?GL_POST_COLOR_MATRIX_COLOR_TABLE.
External documentation.
compileShader(Shader :: i()) -> ok
gl:compileShader/1 compiles the source code strings that have been stored in the
shader object specified by Shader.
External documentation.
compressedTexImage1D(Target, Level, Internalformat, Width, Border,
ImageSize, Data) ->
ok
Types:
Target = enum()
Level = i()
Internalformat = enum()
Width = Border = ImageSize = i()
Data = offset() | mem()
Texturing allows elements of an image array to be read by shaders.
External documentation.
compressedTexImage2D(Target, Level, Internalformat, Width, Height,
Border, ImageSize, Data) ->
ok
Types:
Target = enum()
Level = i()
Internalformat = enum()
Width = Height = Border = ImageSize = i()
Data = offset() | mem()
Texturing allows elements of an image array to be read by shaders.
External documentation.
compressedTexImage3D(Target, Level, Internalformat, Width, Height,
Depth, Border, ImageSize, Data) ->
ok
Types:
Target = enum()
Level = i()
Internalformat = enum()
Width = Height = Depth = Border = ImageSize = i()
Data = offset() | mem()
Texturing allows elements of an image array to be read by shaders.
External documentation.
compressedTexSubImage1D(Target, Level, Xoffset, Width, Format,
ImageSize, Data) ->
ok
compressedTextureSubImage1D(Texture, Level, Xoffset, Width,
Format, ImageSize, Data) ->
ok
Types:
Texture = Level = Xoffset = Width = i()
Format = enum()
ImageSize = i()
Data = offset() | mem()
Texturing allows elements of an image array to be read by shaders.
External documentation.
compressedTexSubImage2D(Target, Level, Xoffset, Yoffset, Width,
Height, Format, ImageSize, Data) ->
ok
compressedTextureSubImage2D(Texture, Level, Xoffset, Yoffset,
Width, Height, Format, ImageSize,
Data) ->
ok
Types:
Texture = Level = Xoffset = Yoffset = Width = Height = i()
Format = enum()
ImageSize = i()
Data = offset() | mem()
Texturing allows elements of an image array to be read by shaders.
External documentation.
compressedTexSubImage3D(Target, Level, Xoffset, Yoffset, Zoffset,
Width, Height, Depth, Format, ImageSize,
Data) ->
ok
compressedTextureSubImage3D(Texture, Level, Xoffset, Yoffset,
Zoffset, Width, Height, Depth, Format,
ImageSize, Data) ->
ok
Types:
Texture = Level = Xoffset = Yoffset = Zoffset = Width = Height = Depth = i()
Format = enum()
ImageSize = i()
Data = offset() | mem()
Texturing allows elements of an image array to be read by shaders.
External documentation.
convolutionFilter1D(Target, Internalformat, Width, Format, Type,
Image) ->
ok
Types:
Target = Internalformat = enum()
Width = i()
Format = Type = enum()
Image = offset() | mem()
gl:convolutionFilter1D/6 builds a one-dimensional convolution filter kernel from an
array of pixels.
External documentation.
convolutionFilter2D(Target, Internalformat, Width, Height, Format,
Type, Image) ->
ok
Types:
Target = Internalformat = enum()
Width = Height = i()
Format = Type = enum()
Image = offset() | mem()
gl:convolutionFilter2D/7 builds a two-dimensional convolution filter kernel from an
array of pixels.
External documentation.
convolutionParameterf(Target :: enum(),
Pname :: enum(),
Params :: tuple()) ->
ok
convolutionParameterfv(Target :: enum(),
Pname :: enum(),
Params :: tuple()) ->
ok
convolutionParameteri(Target :: enum(),
Pname :: enum(),
Params :: tuple()) ->
ok
convolutionParameteriv(Target :: enum(),
Pname :: enum(),
Params :: tuple()) ->
ok
gl:convolutionParameter() sets the value of a convolution parameter.
External documentation.
copyBufferSubData(ReadTarget, WriteTarget, ReadOffset,
WriteOffset, Size) ->
ok
Types:
ReadTarget = WriteTarget = enum()
ReadOffset = WriteOffset = Size = i()
gl:copyBufferSubData/5 and glCopyNamedBufferSubData copy part of the data store
attached to a source buffer object to the data store attached to a destination
buffer object. The number of basic machine units indicated by Size is copied from
the source at offset ReadOffset to the destination at WriteOffset. ReadOffset,
WriteOffset and Size are in terms of basic machine units.
External documentation.
copyColorSubTable(Target :: enum(),
Start :: i(),
X :: i(),
Y :: i(),
Width :: i()) ->
ok
gl:copyColorSubTable/5 is used to respecify a contiguous portion of a color table
previously defined using gl:colorTable/6. The pixels copied from the framebuffer
replace the portion of the existing table from indices Start to start+x-1,
inclusive. This region may not include any entries outside the range of the color
table, as was originally specified. It is not an error to specify a subtexture with
width of 0, but such a specification has no effect.
External documentation.
copyColorTable(Target :: enum(),
Internalformat :: enum(),
X :: i(),
Y :: i(),
Width :: i()) ->
ok
gl:copyColorTable/5 loads a color table with pixels from the current
?GL_READ_BUFFER (rather than from main memory, as is the case for gl:colorTable/6).
External documentation.
copyConvolutionFilter1D(Target :: enum(),
Internalformat :: enum(),
X :: i(),
Y :: i(),
Width :: i()) ->
ok
gl:copyConvolutionFilter1D/5 defines a one-dimensional convolution filter kernel
with pixels from the current ?GL_READ_BUFFER (rather than from main memory, as is
the case for gl:convolutionFilter1D/6).
External documentation.
copyConvolutionFilter2D(Target :: enum(),
Internalformat :: enum(),
X :: i(),
Y :: i(),
Width :: i(),
Height :: i()) ->
ok
gl:copyConvolutionFilter2D/6 defines a two-dimensional convolution filter kernel
with pixels from the current ?GL_READ_BUFFER (rather than from main memory, as is
the case for gl:convolutionFilter2D/7).
External documentation.
copyImageSubData(SrcName, SrcTarget, SrcLevel, SrcX, SrcY, SrcZ,
DstName, DstTarget, DstLevel, DstX, DstY, DstZ,
SrcWidth, SrcHeight, SrcDepth) ->
ok
Types:
SrcName = i()
SrcTarget = enum()
SrcLevel = SrcX = SrcY = SrcZ = DstName = i()
DstTarget = enum()
DstLevel = DstX = DstY = DstZ = SrcWidth = SrcHeight = SrcDepth = i()
gl:copyImageSubData/15 may be used to copy data from one image (i.e. texture or
renderbuffer) to another. gl:copyImageSubData/15 does not perform general-purpose
conversions such as scaling, resizing, blending, color-space, or format
conversions. It should be considered to operate in a manner similar to a CPU
memcpy. CopyImageSubData can copy between images with different internal formats,
provided the formats are compatible.
External documentation.
copyPixels(X :: i(),
Y :: i(),
Width :: i(),
Height :: i(),
Type :: enum()) ->
ok
gl:copyPixels/5 copies a screen-aligned rectangle of pixels from the specified
frame buffer location to a region relative to the current raster position. Its
operation is well defined only if the entire pixel source region is within the
exposed portion of the window. Results of copies from outside the window, or from
regions of the window that are not exposed, are hardware dependent and undefined.
External documentation.
copyTexImage1D(Target, Level, Internalformat, X, Y, Width, Border) ->
ok
Types:
Target = enum()
Level = i()
Internalformat = enum()
X = Y = Width = Border = i()
gl:copyTexImage1D/7 defines a one-dimensional texture image with pixels from the
current ?GL_READ_BUFFER.
External documentation.
copyTexImage2D(Target, Level, Internalformat, X, Y, Width, Height,
Border) ->
ok
Types:
Target = enum()
Level = i()
Internalformat = enum()
X = Y = Width = Height = Border = i()
gl:copyTexImage2D/8 defines a two-dimensional texture image, or cube-map texture
image with pixels from the current ?GL_READ_BUFFER.
External documentation.
copyTexSubImage1D(Target :: enum(),
Level :: i(),
Xoffset :: i(),
X :: i(),
Y :: i(),
Width :: i()) ->
ok
gl:copyTexSubImage1D/6 and glCopyTextureSubImage1D replace a portion of a one-
dimensional texture image with pixels from the current ?GL_READ_BUFFER (rather than
from main memory, as is the case for gl:texSubImage1D/7). For
gl:copyTexSubImage1D/6, the texture object that is bound to Target will be used for
the process. For glCopyTextureSubImage1D, Texture tells which texture object should
be used for the purpose of the call.
External documentation.
copyTexSubImage2D(Target, Level, Xoffset, Yoffset, X, Y, Width,
Height) ->
ok
Types:
Target = enum()
Level = Xoffset = Yoffset = X = Y = Width = Height = i()
gl:copyTexSubImage2D/8 and glCopyTextureSubImage2D replace a rectangular portion of
a two-dimensional texture image, cube-map texture image, rectangular image, or a
linear portion of a number of slices of a one-dimensional array texture with pixels
from the current ?GL_READ_BUFFER (rather than from main memory, as is the case for
gl:texSubImage2D/9).
External documentation.
copyTexSubImage3D(Target, Level, Xoffset, Yoffset, Zoffset, X, Y,
Width, Height) ->
ok
Types:
Target = enum()
Level = Xoffset = Yoffset = Zoffset = X = Y = Width = Height = i()
gl:copyTexSubImage3D/9 and glCopyTextureSubImage3D functions replace a rectangular
portion of a three-dimensional or two-dimensional array texture image with pixels
from the current ?GL_READ_BUFFER (rather than from main memory, as is the case for
gl:texSubImage3D/11).
External documentation.
createBuffers(N :: i()) -> [i()]
gl:createBuffers/1 returns N previously unused buffer names in Buffers, each
representing a new buffer object initialized as if it had been bound to an
unspecified target.
External documentation.
createFramebuffers(N :: i()) -> [i()]
gl:createFramebuffers/1 returns N previously unused framebuffer names in
Framebuffers, each representing a new framebuffer object initialized to the default
state.
External documentation.
createProgram() -> i()
gl:createProgram/0 creates an empty program object and returns a non-zero value by
which it can be referenced. A program object is an object to which shader objects
can be attached. This provides a mechanism to specify the shader objects that will
be linked to create a program. It also provides a means for checking the
compatibility of the shaders that will be used to create a program (for instance,
checking the compatibility between a vertex shader and a fragment shader). When no
longer needed as part of a program object, shader objects can be detached.
External documentation.
createProgramPipelines(N :: i()) -> [i()]
gl:createProgramPipelines/1 returns N previously unused program pipeline names in
Pipelines, each representing a new program pipeline object initialized to the
default state.
External documentation.
createQueries(Target :: enum(), N :: i()) -> [i()]
gl:createQueries/2 returns N previously unused query object names in Ids, each
representing a new query object with the specified Target.
External documentation.
createRenderbuffers(N :: i()) -> [i()]
gl:createRenderbuffers/1 returns N previously unused renderbuffer object names in
Renderbuffers, each representing a new renderbuffer object initialized to the
default state.
External documentation.
createSamplers(N :: i()) -> [i()]
gl:createSamplers/1 returns N previously unused sampler names in Samplers, each
representing a new sampler object initialized to the default state.
External documentation.
createShader(Type :: enum()) -> i()
gl:createShader/1 creates an empty shader object and returns a non-zero value by
which it can be referenced. A shader object is used to maintain the source code
strings that define a shader. ShaderType indicates the type of shader to be
created. Five types of shader are supported. A shader of type ?GL_COMPUTE_SHADER is
a shader that is intended to run on the programmable compute processor. A shader of
type ?GL_VERTEX_SHADER is a shader that is intended to run on the programmable
vertex processor. A shader of type ?GL_TESS_CONTROL_SHADER is a shader that is
intended to run on the programmable tessellation processor in the control stage. A
shader of type ?GL_TESS_EVALUATION_SHADER is a shader that is intended to run on
the programmable tessellation processor in the evaluation stage. A shader of type
?GL_GEOMETRY_SHADER is a shader that is intended to run on the programmable
geometry processor. A shader of type ?GL_FRAGMENT_SHADER is a shader that is
intended to run on the programmable fragment processor.
External documentation.
createShaderProgramv(Type :: enum(),
Strings :: [unicode:chardata()]) ->
i()
gl:createShaderProgram() creates a program object containing compiled and linked
shaders for a single stage specified by Type. Strings refers to an array of Count
strings from which to create the shader executables.
External documentation.
createTextures(Target :: enum(), N :: i()) -> [i()]
gl:createTextures/2 returns N previously unused texture names in Textures, each
representing a new texture object of the dimensionality and type specified by
Target and initialized to the default values for that texture type.
External documentation.
createTransformFeedbacks(N :: i()) -> [i()]
gl:createTransformFeedbacks/1 returns N previously unused transform feedback object
names in Ids, each representing a new transform feedback object initialized to the
default state.
External documentation.
createVertexArrays(N :: i()) -> [i()]
gl:createVertexArrays/1 returns N previously unused vertex array object names in
Arrays, each representing a new vertex array object initialized to the default
state.
External documentation.
cullFace(Mode :: enum()) -> ok
gl:cullFace/1 specifies whether front- or back-facing facets are culled (as
specified by mode) when facet culling is enabled. Facet culling is initially
disabled. To enable and disable facet culling, call the gl:enable/1 and
gl:disable/1 commands with the argument ?GL_CULL_FACE. Facets include triangles,
quadrilaterals, polygons, and rectangles.
External documentation.
debugMessageControl(Source :: enum(),
Type :: enum(),
Severity :: enum(),
Ids :: [i()],
Enabled :: 0 | 1) ->
ok
gl:debugMessageControl/5 controls the reporting of debug messages generated by a
debug context. The parameters Source, Type and Severity form a filter to select
messages from the pool of potential messages generated by the GL.
External documentation.
debugMessageInsert(Source, Type, Id, Severity, Length, Buf) -> ok
Types:
Source = Type = enum()
Id = i()
Severity = enum()
Length = i()
Buf = string()
gl:debugMessageInsert/6 inserts a user-supplied message into the debug output
queue. Source specifies the source that will be used to classify the message and
must be ?GL_DEBUG_SOURCE_APPLICATION or ?GL_DEBUG_SOURCE_THIRD_PARTY. All other
sources are reserved for use by the GL implementation. Type indicates the type of
the message to be inserted and may be one of ?GL_DEBUG_TYPE_ERROR,
?GL_DEBUG_TYPE_DEPRECATED_BEHAVIOR, ?GL_DEBUG_TYPE_UNDEFINED_BEHAVIOR,
?GL_DEBUG_TYPE_PORTABILITY, ?GL_DEBUG_TYPE_PERFORMANCE, ?GL_DEBUG_TYPE_MARKER,
?GL_DEBUG_TYPE_PUSH_GROUP, ?GL_DEBUG_TYPE_POP_GROUP, or ?GL_DEBUG_TYPE_OTHER.
Severity indicates the severity of the message and may be ?GL_DEBUG_SEVERITY_LOW,
?GL_DEBUG_SEVERITY_MEDIUM, ?GL_DEBUG_SEVERITY_HIGH or
?GL_DEBUG_SEVERITY_NOTIFICATION. Id is available for application defined use and
may be any value. This value will be recorded and used to identify the message.
External documentation.
deleteBuffers(Buffers :: [i()]) -> ok
gl:deleteBuffers/1 deletes N buffer objects named by the elements of the array
Buffers. After a buffer object is deleted, it has no contents, and its name is free
for reuse (for example by gl:genBuffers/1). If a buffer object that is currently
bound is deleted, the binding reverts to 0 (the absence of any buffer object).
External documentation.
deleteFramebuffers(Framebuffers :: [i()]) -> ok
gl:deleteFramebuffers/1 deletes the N framebuffer objects whose names are stored in
the array addressed by Framebuffers. The name zero is reserved by the GL and is
silently ignored, should it occur in Framebuffers, as are other unused names. Once
a framebuffer object is deleted, its name is again unused and it has no
attachments. If a framebuffer that is currently bound to one or more of the targets
?GL_DRAW_FRAMEBUFFER or ?GL_READ_FRAMEBUFFER is deleted, it is as though
gl:bindFramebuffer/2 had been executed with the corresponding Target and
Framebuffer zero.
External documentation.
deleteLists(List :: i(), Range :: i()) -> ok
gl:deleteLists/2 causes a contiguous group of display lists to be deleted. List is
the name of the first display list to be deleted, and Range is the number of
display lists to delete. All display lists d with list<= d<= list+range-1 are
deleted.
External documentation.
deleteProgram(Program :: i()) -> ok
gl:deleteProgram/1 frees the memory and invalidates the name associated with the
program object specified by Program. This command effectively undoes the effects of
a call to gl:createProgram/0.
External documentation.
deleteProgramPipelines(Pipelines :: [i()]) -> ok
gl:deleteProgramPipelines/1 deletes the N program pipeline objects whose names are
stored in the array Pipelines. Unused names in Pipelines are ignored, as is the
name zero. After a program pipeline object is deleted, its name is again unused and
it has no contents. If program pipeline object that is currently bound is deleted,
the binding for that object reverts to zero and no program pipeline object becomes
current.
External documentation.
deleteQueries(Ids :: [i()]) -> ok
gl:deleteQueries/1 deletes N query objects named by the elements of the array Ids.
After a query object is deleted, it has no contents, and its name is free for reuse
(for example by gl:genQueries/1).
External documentation.
deleteRenderbuffers(Renderbuffers :: [i()]) -> ok
gl:deleteRenderbuffers/1 deletes the N renderbuffer objects whose names are stored
in the array addressed by Renderbuffers. The name zero is reserved by the GL and is
silently ignored, should it occur in Renderbuffers, as are other unused names. Once
a renderbuffer object is deleted, its name is again unused and it has no contents.
If a renderbuffer that is currently bound to the target ?GL_RENDERBUFFER is
deleted, it is as though gl:bindRenderbuffer/2 had been executed with a Target of
?GL_RENDERBUFFER and a Name of zero.
External documentation.
deleteSamplers(Samplers :: [i()]) -> ok
gl:deleteSamplers/1 deletes N sampler objects named by the elements of the array
Samplers. After a sampler object is deleted, its name is again unused. If a sampler
object that is currently bound to a sampler unit is deleted, it is as though
gl:bindSampler/2 is called with unit set to the unit the sampler is bound to and
sampler zero. Unused names in samplers are silently ignored, as is the reserved
name zero.
External documentation.
deleteShader(Shader :: i()) -> ok
gl:deleteShader/1 frees the memory and invalidates the name associated with the
shader object specified by Shader. This command effectively undoes the effects of a
call to gl:createShader/1.
External documentation.
deleteSync(Sync :: i()) -> ok
gl:deleteSync/1 deletes the sync object specified by Sync. If the fence command
corresponding to the specified sync object has completed, or if no gl:waitSync/3 or
gl:clientWaitSync/3 commands are blocking on Sync, the object is deleted
immediately. Otherwise, Sync is flagged for deletion and will be deleted when it is
no longer associated with any fence command and is no longer blocking any
gl:waitSync/3 or gl:clientWaitSync/3 command. In either case, after gl:deleteSync/1
returns, the name Sync is invalid and can no longer be used to refer to the sync
object.
External documentation.
deleteTextures(Textures :: [i()]) -> ok
gl:deleteTextures/1 deletes N textures named by the elements of the array Textures.
After a texture is deleted, it has no contents or dimensionality, and its name is
free for reuse (for example by gl:genTextures/1). If a texture that is currently
bound is deleted, the binding reverts to 0 (the default texture).
External documentation.
deleteTransformFeedbacks(Ids :: [i()]) -> ok
gl:deleteTransformFeedbacks/1 deletes the N transform feedback objects whose names
are stored in the array Ids. Unused names in Ids are ignored, as is the name zero.
After a transform feedback object is deleted, its name is again unused and it has
no contents. If an active transform feedback object is deleted, its name
immediately becomes unused, but the underlying object is not deleted until it is no
longer active.
External documentation.
deleteVertexArrays(Arrays :: [i()]) -> ok
gl:deleteVertexArrays/1 deletes N vertex array objects whose names are stored in
the array addressed by Arrays. Once a vertex array object is deleted it has no
contents and its name is again unused. If a vertex array object that is currently
bound is deleted, the binding for that object reverts to zero and the default
vertex array becomes current. Unused names in Arrays are silently ignored, as is
the value zero.
External documentation.
depthFunc(Func :: enum()) -> ok
gl:depthFunc/1 specifies the function used to compare each incoming pixel depth
value with the depth value present in the depth buffer. The comparison is performed
only if depth testing is enabled. (See gl:enable/1 and gl:disable/1 of
?GL_DEPTH_TEST.)
External documentation.
depthMask(Flag :: 0 | 1) -> ok
gl:depthMask/1 specifies whether the depth buffer is enabled for writing. If Flag
is ?GL_FALSE, depth buffer writing is disabled. Otherwise, it is enabled.
Initially, depth buffer writing is enabled.
External documentation.
depthRange(Near_val :: clamp(), Far_val :: clamp()) -> ok
depthRangef(N :: f(), F :: f()) -> ok
After clipping and division by w, depth coordinates range from -1 to 1,
corresponding to the near and far clipping planes. gl:depthRange/2 specifies a
linear mapping of the normalized depth coordinates in this range to window depth
coordinates. Regardless of the actual depth buffer implementation, window
coordinate depth values are treated as though they range from 0 through 1 (like
color components). Thus, the values accepted by gl:depthRange/2 are both clamped to
this range before they are accepted.
External documentation.
depthRangeArrayv(First :: i(), V :: [{f(), f()}]) -> ok
After clipping and division by w, depth coordinates range from -1 to 1,
corresponding to the near and far clipping planes. Each viewport has an independent
depth range specified as a linear mapping of the normalized depth coordinates in
this range to window depth coordinates. Regardless of the actual depth buffer
implementation, window coordinate depth values are treated as though they range
from 0 through 1 (like color components). gl:depthRangeArray() specifies a linear
mapping of the normalized depth coordinates in this range to window depth
coordinates for each viewport in the range [First, First + Count). Thus, the values
accepted by gl:depthRangeArray() are both clamped to this range before they are
accepted.
External documentation.
depthRangeIndexed(Index :: i(), N :: f(), F :: f()) -> ok
After clipping and division by w, depth coordinates range from -1 to 1,
corresponding to the near and far clipping planes. Each viewport has an independent
depth range specified as a linear mapping of the normalized depth coordinates in
this range to window depth coordinates. Regardless of the actual depth buffer
implementation, window coordinate depth values are treated as though they range
from 0 through 1 (like color components). gl:depthRangeIndexed/3 specifies a linear
mapping of the normalized depth coordinates in this range to window depth
coordinates for a specified viewport. Thus, the values accepted by
gl:depthRangeIndexed/3 are both clamped to this range before they are accepted.
External documentation.
detachShader(Program :: i(), Shader :: i()) -> ok
gl:detachShader/2 detaches the shader object specified by Shader from the program
object specified by Program. This command can be used to undo the effect of the
command gl:attachShader/2.
External documentation.
dispatchCompute(Num_groups_x :: i(),
Num_groups_y :: i(),
Num_groups_z :: i()) ->
ok
gl:dispatchCompute/3 launches one or more compute work groups. Each work group is
processed by the active program object for the compute shader stage. While the
individual shader invocations within a work group are executed as a unit, work
groups are executed completely independently and in unspecified order.
Num_groups_x, Num_groups_y and Num_groups_z specify the number of local work groups
that will be dispatched in the X, Y and Z dimensions, respectively.
External documentation.
dispatchComputeIndirect(Indirect :: i()) -> ok
gl:dispatchComputeIndirect/1 launches one or more compute work groups using
parameters stored in the buffer object currently bound to the
?GL_DISPATCH_INDIRECT_BUFFER target. Each work group is processed by the active
program object for the compute shader stage. While the individual shader
invocations within a work group are executed as a unit, work groups are executed
completely independently and in unspecified order. Indirect contains the offset
into the data store of the buffer object bound to the ?GL_DISPATCH_INDIRECT_BUFFER
target at which the parameters are stored.
External documentation.
drawArrays(Mode :: enum(), First :: i(), Count :: i()) -> ok
gl:drawArrays/3 specifies multiple geometric primitives with very few subroutine
calls. Instead of calling a GL procedure to pass each individual vertex, normal,
texture coordinate, edge flag, or color, you can prespecify separate arrays of
vertices, normals, and colors and use them to construct a sequence of primitives
with a single call to gl:drawArrays/3.
External documentation.
drawArraysIndirect(Mode :: enum(), Indirect :: offset() | mem()) ->
ok
gl:drawArraysIndirect/2 specifies multiple geometric primitives with very few
subroutine calls. gl:drawArraysIndirect/2 behaves similarly to
gl:drawArraysInstancedBaseInstance/5, execept that the parameters to
gl:drawArraysInstancedBaseInstance/5 are stored in memory at the address given by
Indirect.
External documentation.
drawArraysInstanced(Mode :: enum(),
First :: i(),
Count :: i(),
Instancecount :: i()) ->
ok
gl:drawArraysInstanced/4 behaves identically to gl:drawArrays/3 except that
Instancecount instances of the range of elements are executed and the value of the
internal counter InstanceID advances for each iteration. InstanceID is an internal
32-bit integer counter that may be read by a vertex shader as ?gl_InstanceID.
External documentation.
drawArraysInstancedBaseInstance(Mode :: enum(),
First :: i(),
Count :: i(),
Instancecount :: i(),
Baseinstance :: i()) ->
ok
gl:drawArraysInstancedBaseInstance/5 behaves identically to gl:drawArrays/3 except
that Instancecount instances of the range of elements are executed and the value of
the internal counter InstanceID advances for each iteration. InstanceID is an
internal 32-bit integer counter that may be read by a vertex shader as
?gl_InstanceID.
External documentation.
drawBuffer(Mode :: enum()) -> ok
When colors are written to the frame buffer, they are written into the color
buffers specified by gl:drawBuffer/1. One of the following values can be used for
default framebuffer:
External documentation.
drawBuffers(Bufs :: [enum()]) -> ok
gl:drawBuffers/1 and glNamedFramebufferDrawBuffers define an array of buffers into
which outputs from the fragment shader data will be written. If a fragment shader
writes a value to one or more user defined output variables, then the value of each
variable will be written into the buffer specified at a location within Bufs
corresponding to the location assigned to that user defined output. The draw buffer
used for user defined outputs assigned to locations greater than or equal to N is
implicitly set to ?GL_NONE and any data written to such an output is discarded.
External documentation.
drawElements(Mode :: enum(),
Count :: i(),
Type :: enum(),
Indices :: offset() | mem()) ->
ok
gl:drawElements/4 specifies multiple geometric primitives with very few subroutine
calls. Instead of calling a GL function to pass each individual vertex, normal,
texture coordinate, edge flag, or color, you can prespecify separate arrays of
vertices, normals, and so on, and use them to construct a sequence of primitives
with a single call to gl:drawElements/4.
External documentation.
drawElementsBaseVertex(Mode, Count, Type, Indices, Basevertex) ->
ok
Types:
Mode = enum()
Count = i()
Type = enum()
Indices = offset() | mem()
Basevertex = i()
gl:drawElementsBaseVertex/5 behaves identically to gl:drawElements/4 except that
the ith element transferred by the corresponding draw call will be taken from
element Indices[i] + Basevertex of each enabled array. If the resulting value is
larger than the maximum value representable by Type, it is as if the calculation
were upconverted to 32-bit unsigned integers (with wrapping on overflow
conditions). The operation is undefined if the sum would be negative.
External documentation.
drawElementsIndirect(Mode :: enum(),
Type :: enum(),
Indirect :: offset() | mem()) ->
ok
gl:drawElementsIndirect/3 specifies multiple indexed geometric primitives with very
few subroutine calls. gl:drawElementsIndirect/3 behaves similarly to
gl:drawElementsInstancedBaseVertexBaseInstance/7, execpt that the parameters to
gl:drawElementsInstancedBaseVertexBaseInstance/7 are stored in memory at the
address given by Indirect.
External documentation.
drawElementsInstanced(Mode, Count, Type, Indices, Instancecount) ->
ok
Types:
Mode = enum()
Count = i()
Type = enum()
Indices = offset() | mem()
Instancecount = i()
gl:drawElementsInstanced/5 behaves identically to gl:drawElements/4 except that
Instancecount instances of the set of elements are executed and the value of the
internal counter InstanceID advances for each iteration. InstanceID is an internal
32-bit integer counter that may be read by a vertex shader as ?gl_InstanceID.
External documentation.
drawElementsInstancedBaseInstance(Mode, Count, Type, Indices,
Instancecount, Baseinstance) ->
ok
Types:
Mode = enum()
Count = i()
Type = enum()
Indices = offset() | mem()
Instancecount = Baseinstance = i()
gl:drawElementsInstancedBaseInstance/6 behaves identically to gl:drawElements/4
except that Instancecount instances of the set of elements are executed and the
value of the internal counter InstanceID advances for each iteration. InstanceID is
an internal 32-bit integer counter that may be read by a vertex shader as
?gl_InstanceID.
External documentation.
drawElementsInstancedBaseVertex(Mode, Count, Type, Indices,
Instancecount, Basevertex) ->
ok
Types:
Mode = enum()
Count = i()
Type = enum()
Indices = offset() | mem()
Instancecount = Basevertex = i()
gl:drawElementsInstancedBaseVertex/6 behaves identically to
gl:drawElementsInstanced/5 except that the ith element transferred by the
corresponding draw call will be taken from element Indices[i] + Basevertex of each
enabled array. If the resulting value is larger than the maximum value
representable by Type, it is as if the calculation were upconverted to 32-bit
unsigned integers (with wrapping on overflow conditions). The operation is
undefined if the sum would be negative.
External documentation.
drawElementsInstancedBaseVertexBaseInstance(Mode, Count, Type,
Indices,
Instancecount,
Basevertex,
Baseinstance) ->
ok
Types:
Mode = enum()
Count = i()
Type = enum()
Indices = offset() | mem()
Instancecount = Basevertex = Baseinstance = i()
gl:drawElementsInstancedBaseVertexBaseInstance/7 behaves identically to
gl:drawElementsInstanced/5 except that the ith element transferred by the
corresponding draw call will be taken from element Indices[i] + Basevertex of each
enabled array. If the resulting value is larger than the maximum value
representable by Type, it is as if the calculation were upconverted to 32-bit
unsigned integers (with wrapping on overflow conditions). The operation is
undefined if the sum would be negative.
External documentation.
drawPixels(Width :: i(),
Height :: i(),
Format :: enum(),
Type :: enum(),
Pixels :: offset() | mem()) ->
ok
gl:drawPixels/5 reads pixel data from memory and writes it into the frame buffer
relative to the current raster position, provided that the raster position is
valid. Use gl:rasterPos() or gl:windowPos() to set the current raster position; use
gl:get() with argument ?GL_CURRENT_RASTER_POSITION_VALID to determine if the
specified raster position is valid, and gl:get() with argument
?GL_CURRENT_RASTER_POSITION to query the raster position.
External documentation.
drawRangeElements(Mode, Start, End, Count, Type, Indices) -> ok
Types:
Mode = enum()
Start = End = Count = i()
Type = enum()
Indices = offset() | mem()
gl:drawRangeElements/6 is a restricted form of gl:drawElements/4. Mode, and Count
match the corresponding arguments to gl:drawElements/4, with the additional
constraint that all values in the arrays Count must lie between Start and End,
inclusive.
External documentation.
drawRangeElementsBaseVertex(Mode, Start, End, Count, Type,
Indices, Basevertex) ->
ok
Types:
Mode = enum()
Start = End = Count = i()
Type = enum()
Indices = offset() | mem()
Basevertex = i()
gl:drawRangeElementsBaseVertex/7 is a restricted form of
gl:drawElementsBaseVertex/5. Mode, Count and Basevertex match the corresponding
arguments to gl:drawElementsBaseVertex/5, with the additional constraint that all
values in the array Indices must lie between Start and End, inclusive, prior to
adding Basevertex. Index values lying outside the range [Start, End] are treated in
the same way as gl:drawElementsBaseVertex/5. The ith element transferred by the
corresponding draw call will be taken from element Indices[i] + Basevertex of each
enabled array. If the resulting value is larger than the maximum value
representable by Type, it is as if the calculation were upconverted to 32-bit
unsigned integers (with wrapping on overflow conditions). The operation is
undefined if the sum would be negative.
External documentation.
drawTransformFeedback(Mode :: enum(), Id :: i()) -> ok
gl:drawTransformFeedback/2 draws primitives of a type specified by Mode using a
count retrieved from the transform feedback specified by Id. Calling
gl:drawTransformFeedback/2 is equivalent to calling gl:drawArrays/3 with Mode as
specified, First set to zero, and Count set to the number of vertices captured on
vertex stream zero the last time transform feedback was active on the transform
feedback object named by Id.
External documentation.
drawTransformFeedbackInstanced(Mode :: enum(),
Id :: i(),
Instancecount :: i()) ->
ok
gl:drawTransformFeedbackInstanced/3 draws multiple copies of a range of primitives
of a type specified by Mode using a count retrieved from the transform feedback
stream specified by Stream of the transform feedback object specified by Id.
Calling gl:drawTransformFeedbackInstanced/3 is equivalent to calling
gl:drawArraysInstanced/4 with Mode and Instancecount as specified, First set to
zero, and Count set to the number of vertices captured on vertex stream zero the
last time transform feedback was active on the transform feedback object named by
Id.
External documentation.
drawTransformFeedbackStream(Mode :: enum(),
Id :: i(),
Stream :: i()) ->
ok
gl:drawTransformFeedbackStream/3 draws primitives of a type specified by Mode using
a count retrieved from the transform feedback stream specified by Stream of the
transform feedback object specified by Id. Calling gl:drawTransformFeedbackStream/3
is equivalent to calling gl:drawArrays/3 with Mode as specified, First set to zero,
and Count set to the number of vertices captured on vertex stream Stream the last
time transform feedback was active on the transform feedback object named by Id.
External documentation.
drawTransformFeedbackStreamInstanced(Mode :: enum(),
Id :: i(),
Stream :: i(),
Instancecount :: i()) ->
ok
gl:drawTransformFeedbackStreamInstanced/4 draws multiple copies of a range of
primitives of a type specified by Mode using a count retrieved from the transform
feedback stream specified by Stream of the transform feedback object specified by
Id. Calling gl:drawTransformFeedbackStreamInstanced/4 is equivalent to calling
gl:drawArraysInstanced/4 with Mode and Instancecount as specified, First set to
zero, and Count set to the number of vertices captured on vertex stream Stream the
last time transform feedback was active on the transform feedback object named by
Id.
External documentation.
edgeFlag(Flag :: 0 | 1) -> ok
edgeFlagv(X1 :: {Flag :: 0 | 1}) -> ok
Each vertex of a polygon, separate triangle, or separate quadrilateral specified
between a gl:'begin'/1/gl:'end'/0 pair is marked as the start of either a boundary
or nonboundary edge. If the current edge flag is true when the vertex is specified,
the vertex is marked as the start of a boundary edge. Otherwise, the vertex is
marked as the start of a nonboundary edge. gl:edgeFlag/1 sets the edge flag bit to
?GL_TRUE if Flag is ?GL_TRUE and to ?GL_FALSE otherwise.
External documentation.
edgeFlagPointer(Stride :: i(), Ptr :: offset() | mem()) -> ok
gl:edgeFlagPointer/2 specifies the location and data format of an array of boolean
edge flags to use when rendering. Stride specifies the byte stride from one edge
flag to the next, allowing vertices and attributes to be packed into a single array
or stored in separate arrays.
External documentation.
disable(Cap :: enum()) -> ok
disablei(Target :: enum(), Index :: i()) -> ok
enable(Cap :: enum()) -> ok
enablei(Target :: enum(), Index :: i()) -> ok
gl:enable/1 and gl:disable/1 enable and disable various capabilities. Use
gl:isEnabled/1 or gl:get() to determine the current setting of any capability. The
initial value for each capability with the exception of ?GL_DITHER and
?GL_MULTISAMPLE is ?GL_FALSE. The initial value for ?GL_DITHER and ?GL_MULTISAMPLE
is ?GL_TRUE.
External documentation.
disableClientState(Cap :: enum()) -> ok
enableClientState(Cap :: enum()) -> ok
gl:enableClientState/1 and gl:disableClientState/1 enable or disable individual
client-side capabilities. By default, all client-side capabilities are disabled.
Both gl:enableClientState/1 and gl:disableClientState/1 take a single argument,
Cap, which can assume one of the following values:
External documentation.
disableVertexArrayAttrib(Vaobj :: i(), Index :: i()) -> ok
disableVertexAttribArray(Index :: i()) -> ok
enableVertexArrayAttrib(Vaobj :: i(), Index :: i()) -> ok
enableVertexAttribArray(Index :: i()) -> ok
gl:enableVertexAttribArray/1 and gl:enableVertexArrayAttrib/2 enable the generic
vertex attribute array specified by Index. gl:enableVertexAttribArray/1 uses
currently bound vertex array object for the operation, whereas
gl:enableVertexArrayAttrib/2 updates state of the vertex array object with ID
Vaobj.
External documentation.
evalCoord1d(U :: f()) -> ok
evalCoord1dv(X1 :: {U :: f()}) -> ok
evalCoord1f(U :: f()) -> ok
evalCoord1fv(X1 :: {U :: f()}) -> ok
evalCoord2d(U :: f(), V :: f()) -> ok
evalCoord2dv(X1 :: {U :: f(), V :: f()}) -> ok
evalCoord2f(U :: f(), V :: f()) -> ok
evalCoord2fv(X1 :: {U :: f(), V :: f()}) -> ok
gl:evalCoord1() evaluates enabled one-dimensional maps at argument U.
gl:evalCoord2() does the same for two-dimensional maps using two domain values, U
and V. To define a map, call glMap1 and glMap2; to enable and disable it, call
gl:enable/1 and gl:disable/1.
External documentation.
evalMesh1(Mode :: enum(), I1 :: i(), I2 :: i()) -> ok
evalMesh2(Mode :: enum(),
I1 :: i(),
I2 :: i(),
J1 :: i(),
J2 :: i()) ->
ok
gl:mapGrid() and gl:evalMesh() are used in tandem to efficiently generate and
evaluate a series of evenly-spaced map domain values. gl:evalMesh() steps through
the integer domain of a one- or two-dimensional grid, whose range is the domain of
the evaluation maps specified by glMap1 and glMap2. Mode determines whether the
resulting vertices are connected as points, lines, or filled polygons.
External documentation.
evalPoint1(I :: i()) -> ok
evalPoint2(I :: i(), J :: i()) -> ok
gl:mapGrid() and gl:evalMesh() are used in tandem to efficiently generate and
evaluate a series of evenly spaced map domain values. gl:evalPoint() can be used to
evaluate a single grid point in the same gridspace that is traversed by
gl:evalMesh(). Calling gl:evalPoint1/1 is equivalent to calling glEvalCoord1( i.ð
u+u 1 ); where ð u=(u 2-u 1)/n
External documentation.
feedbackBuffer(Size :: i(), Type :: enum(), Buffer :: mem()) -> ok
The gl:feedbackBuffer/3 function controls feedback. Feedback, like selection, is a
GL mode. The mode is selected by calling gl:renderMode/1 with ?GL_FEEDBACK. When
the GL is in feedback mode, no pixels are produced by rasterization. Instead,
information about primitives that would have been rasterized is fed back to the
application using the GL.
External documentation.
fenceSync(Condition :: enum(), Flags :: i()) -> i()
gl:fenceSync/2 creates a new fence sync object, inserts a fence command into the GL
command stream and associates it with that sync object, and returns a non-zero name
corresponding to the sync object.
External documentation.
finish() -> ok
gl:finish/0 does not return until the effects of all previously called GL commands
are complete. Such effects include all changes to GL state, all changes to
connection state, and all changes to the frame buffer contents.
External documentation.
flush() -> ok
Different GL implementations buffer commands in several different locations,
including network buffers and the graphics accelerator itself. gl:flush/0 empties
all of these buffers, causing all issued commands to be executed as quickly as they
are accepted by the actual rendering engine. Though this execution may not be
completed in any particular time period, it does complete in finite time.
External documentation.
flushMappedBufferRange(Target :: enum(),
Offset :: i(),
Length :: i()) ->
ok
flushMappedNamedBufferRange(Buffer :: i(),
Offset :: i(),
Length :: i()) ->
ok
gl:flushMappedBufferRange/3 indicates that modifications have been made to a range
of a mapped buffer object. The buffer object must previously have been mapped with
the ?GL_MAP_FLUSH_EXPLICIT_BIT flag.
External documentation.
fogf(Pname :: enum(), Param :: f()) -> ok
fogfv(Pname :: enum(), Params :: tuple()) -> ok
fogi(Pname :: enum(), Param :: i()) -> ok
fogiv(Pname :: enum(), Params :: tuple()) -> ok
Fog is initially disabled. While enabled, fog affects rasterized geometry, bitmaps,
and pixel blocks, but not buffer clear operations. To enable and disable fog, call
gl:enable/1 and gl:disable/1 with argument ?GL_FOG.
External documentation.
fogCoordd(Coord :: f()) -> ok
fogCoorddv(X1 :: {Coord :: f()}) -> ok
fogCoordf(Coord :: f()) -> ok
fogCoordfv(X1 :: {Coord :: f()}) -> ok
gl:fogCoord() specifies the fog coordinate that is associated with each vertex and
the current raster position. The value specified is interpolated and used in
computing the fog color (see gl:fog()).
External documentation.
fogCoordPointer(Type :: enum(),
Stride :: i(),
Pointer :: offset() | mem()) ->
ok
gl:fogCoordPointer/3 specifies the location and data format of an array of fog
coordinates to use when rendering. Type specifies the data type of each fog
coordinate, and Stride specifies the byte stride from one fog coordinate to the
next, allowing vertices and attributes to be packed into a single array or stored
in separate arrays.
External documentation.
framebufferParameteri(Target :: enum(),
Pname :: enum(),
Param :: i()) ->
ok
gl:framebufferParameteri/3 and glNamedFramebufferParameteri modify the value of the
parameter named Pname in the specified framebuffer object. There are no modifiable
parameters of the default draw and read framebuffer, so they are not valid targets
of these commands.
External documentation.
framebufferRenderbuffer(Target, Attachment, Renderbuffertarget,
Renderbuffer) ->
ok
Types:
Target = Attachment = Renderbuffertarget = enum()
Renderbuffer = i()
gl:framebufferRenderbuffer/4 and glNamedFramebufferRenderbuffer attaches a
renderbuffer as one of the logical buffers of the specified framebuffer object.
Renderbuffers cannot be attached to the default draw and read framebuffer, so they
are not valid targets of these commands.
External documentation.
framebufferTexture(Target :: enum(),
Attachment :: enum(),
Texture :: i(),
Level :: i()) ->
ok
framebufferTexture1D(Target :: enum(),
Attachment :: enum(),
Textarget :: enum(),
Texture :: i(),
Level :: i()) ->
ok
framebufferTexture2D(Target :: enum(),
Attachment :: enum(),
Textarget :: enum(),
Texture :: i(),
Level :: i()) ->
ok
framebufferTexture3D(Target, Attachment, Textarget, Texture,
Level, Zoffset) ->
ok
framebufferTextureFaceARB(Target :: enum(),
Attachment :: enum(),
Texture :: i(),
Level :: i(),
Face :: enum()) ->
ok
framebufferTextureLayer(Target :: enum(),
Attachment :: enum(),
Texture :: i(),
Level :: i(),
Layer :: i()) ->
ok
These commands attach a selected mipmap level or image of a texture object as one
of the logical buffers of the specified framebuffer object. Textures cannot be
attached to the default draw and read framebuffer, so they are not valid targets of
these commands.
External documentation.
frontFace(Mode :: enum()) -> ok
In a scene composed entirely of opaque closed surfaces, back-facing polygons are
never visible. Eliminating these invisible polygons has the obvious benefit of
speeding up the rendering of the image. To enable and disable elimination of back-
facing polygons, call gl:enable/1 and gl:disable/1 with argument ?GL_CULL_FACE.
External documentation.
frustum(Left :: f(),
Right :: f(),
Bottom :: f(),
Top :: f(),
Near_val :: f(),
Far_val :: f()) ->
ok
gl:frustum/6 describes a perspective matrix that produces a perspective projection.
The current matrix (see gl:matrixMode/1) is multiplied by this matrix and the
result replaces the current matrix, as if gl:multMatrix() were called with the
following matrix as its argument:
External documentation.
genBuffers(N :: i()) -> [i()]
gl:genBuffers/1 returns N buffer object names in Buffers. There is no guarantee
that the names form a contiguous set of integers; however, it is guaranteed that
none of the returned names was in use immediately before the call to
gl:genBuffers/1.
External documentation.
genFramebuffers(N :: i()) -> [i()]
gl:genFramebuffers/1 returns N framebuffer object names in Ids. There is no
guarantee that the names form a contiguous set of integers; however, it is
guaranteed that none of the returned names was in use immediately before the call
to gl:genFramebuffers/1.
External documentation.
genLists(Range :: i()) -> i()
gl:genLists/1 has one argument, Range. It returns an integer n such that Range
contiguous empty display lists, named n, n+1, ..., n+range-1, are created. If Range
is 0, if there is no group of Range contiguous names available, or if any error is
generated, no display lists are generated, and 0 is returned.
External documentation.
genProgramPipelines(N :: i()) -> [i()]
gl:genProgramPipelines/1 returns N previously unused program pipeline object names
in Pipelines. These names are marked as used, for the purposes of
gl:genProgramPipelines/1 only, but they acquire program pipeline state only when
they are first bound.
External documentation.
genQueries(N :: i()) -> [i()]
gl:genQueries/1 returns N query object names in Ids. There is no guarantee that the
names form a contiguous set of integers; however, it is guaranteed that none of the
returned names was in use immediately before the call to gl:genQueries/1.
External documentation.
genRenderbuffers(N :: i()) -> [i()]
gl:genRenderbuffers/1 returns N renderbuffer object names in Renderbuffers. There
is no guarantee that the names form a contiguous set of integers; however, it is
guaranteed that none of the returned names was in use immediately before the call
to gl:genRenderbuffers/1.
External documentation.
genSamplers(Count :: i()) -> [i()]
gl:genSamplers/1 returns N sampler object names in Samplers. There is no guarantee
that the names form a contiguous set of integers; however, it is guaranteed that
none of the returned names was in use immediately before the call to
gl:genSamplers/1.
External documentation.
genTextures(N :: i()) -> [i()]
gl:genTextures/1 returns N texture names in Textures. There is no guarantee that
the names form a contiguous set of integers; however, it is guaranteed that none of
the returned names was in use immediately before the call to gl:genTextures/1.
External documentation.
genTransformFeedbacks(N :: i()) -> [i()]
gl:genTransformFeedbacks/1 returns N previously unused transform feedback object
names in Ids. These names are marked as used, for the purposes of
gl:genTransformFeedbacks/1 only, but they acquire transform feedback state only
when they are first bound.
External documentation.
genVertexArrays(N :: i()) -> [i()]
gl:genVertexArrays/1 returns N vertex array object names in Arrays. There is no
guarantee that the names form a contiguous set of integers; however, it is
guaranteed that none of the returned names was in use immediately before the call
to gl:genVertexArrays/1.
External documentation.
generateMipmap(Target :: enum()) -> ok
generateTextureMipmap(Texture :: i()) -> ok
gl:generateMipmap/1 and gl:generateTextureMipmap/1 generates mipmaps for the
specified texture object. For gl:generateMipmap/1, the texture object that is bound
to Target. For gl:generateTextureMipmap/1, Texture is the name of the texture
object.
External documentation.
getBooleani_v(Target :: enum(), Index :: i()) -> [0 | 1]
getBooleanv(Pname :: enum()) -> [0 | 1]
getDoublei_v(Target :: enum(), Index :: i()) -> [f()]
getDoublev(Pname :: enum()) -> [f()]
getFloati_v(Target :: enum(), Index :: i()) -> [f()]
getFloatv(Pname :: enum()) -> [f()]
getInteger64i_v(Target :: enum(), Index :: i()) -> [i()]
getInteger64v(Pname :: enum()) -> [i()]
getIntegeri_v(Target :: enum(), Index :: i()) -> [i()]
getIntegerv(Pname :: enum()) -> [i()]
These commands return values for simple state variables in GL. Pname is a symbolic
constant indicating the state variable to be returned, and Data is a pointer to an
array of the indicated type in which to place the returned data.
External documentation.
getActiveAttrib(Program :: i(), Index :: i(), BufSize :: i()) ->
{Size :: i(), Type :: enum(), Name :: string()}
gl:getActiveAttrib/3 returns information about an active attribute variable in the
program object specified by Program. The number of active attributes can be
obtained by calling gl:getProgram() with the value ?GL_ACTIVE_ATTRIBUTES. A value
of 0 for Index selects the first active attribute variable. Permissible values for
Index range from zero to the number of active attribute variables minus one.
External documentation.
getActiveSubroutineName(Program :: i(),
Shadertype :: enum(),
Index :: i(),
Bufsize :: i()) ->
string()
gl:getActiveSubroutineName/4 queries the name of an active shader subroutine
uniform from the program object given in Program. Index specifies the index of the
shader subroutine uniform within the shader stage given by Stage, and must between
zero and the value of ?GL_ACTIVE_SUBROUTINES minus one for the shader stage.
External documentation.
getActiveSubroutineUniformName(Program :: i(),
Shadertype :: enum(),
Index :: i(),
Bufsize :: i()) ->
string()
gl:getActiveSubroutineUniformName/4 retrieves the name of an active shader
subroutine uniform. Program contains the name of the program containing the
uniform. Shadertype specifies the stage for which the uniform location, given by
Index, is valid. Index must be between zero and the value of
?GL_ACTIVE_SUBROUTINE_UNIFORMS minus one for the shader stage.
External documentation.
getActiveUniform(Program :: i(), Index :: i(), BufSize :: i()) ->
{Size :: i(),
Type :: enum(),
Name :: string()}
gl:getActiveUniform/3 returns information about an active uniform variable in the
program object specified by Program. The number of active uniform variables can be
obtained by calling gl:getProgram() with the value ?GL_ACTIVE_UNIFORMS. A value of
0 for Index selects the first active uniform variable. Permissible values for Index
range from zero to the number of active uniform variables minus one.
External documentation.
getActiveUniformBlockiv(Program :: i(),
UniformBlockIndex :: i(),
Pname :: enum(),
Params :: mem()) ->
ok
gl:getActiveUniformBlockiv/4 retrieves information about an active uniform block
within Program.
External documentation.
getActiveUniformBlockName(Program :: i(),
UniformBlockIndex :: i(),
BufSize :: i()) ->
string()
gl:getActiveUniformBlockName/3 retrieves the name of the active uniform block at
UniformBlockIndex within Program.
External documentation.
getActiveUniformName(Program :: i(),
UniformIndex :: i(),
BufSize :: i()) ->
string()
gl:getActiveUniformName/3 returns the name of the active uniform at UniformIndex
within Program. If UniformName is not NULL, up to BufSize characters (including a
nul-terminator) will be written into the array whose address is specified by
UniformName. If Length is not NULL, the number of characters that were (or would
have been) written into UniformName (not including the nul-terminator) will be
placed in the variable whose address is specified in Length. If Length is NULL, no
length is returned. The length of the longest uniform name in Program is given by
the value of ?GL_ACTIVE_UNIFORM_MAX_LENGTH, which can be queried with
gl:getProgram().
External documentation.
getActiveUniformsiv(Program :: i(),
UniformIndices :: [i()],
Pname :: enum()) ->
[i()]
gl:getActiveUniformsiv/3 queries the value of the parameter named Pname for each of
the uniforms within Program whose indices are specified in the array of
UniformCount unsigned integers UniformIndices. Upon success, the value of the
parameter for each uniform is written into the corresponding entry in the array
whose address is given in Params. If an error is generated, nothing is written into
Params.
External documentation.
getAttachedShaders(Program :: i(), MaxCount :: i()) -> [i()]
gl:getAttachedShaders/2 returns the names of the shader objects attached to
Program. The names of shader objects that are attached to Program will be returned
in Shaders. The actual number of shader names written into Shaders is returned in
Count. If no shader objects are attached to Program, Count is set to 0. The maximum
number of shader names that may be returned in Shaders is specified by MaxCount.
External documentation.
getAttribLocation(Program :: i(), Name :: string()) -> i()
gl:getAttribLocation/2 queries the previously linked program object specified by
Program for the attribute variable specified by Name and returns the index of the
generic vertex attribute that is bound to that attribute variable. If Name is a
matrix attribute variable, the index of the first column of the matrix is returned.
If the named attribute variable is not an active attribute in the specified program
object or if Name starts with the reserved prefix "gl_", a value of -1 is returned.
External documentation.
getBufferParameteri64v(Target :: enum(), Pname :: enum()) -> [i()]
getBufferParameterivARB(Target :: enum(), Pname :: enum()) ->
[i()]
These functions return in Data a selected parameter of the specified buffer object.
External documentation.
getBufferParameteriv(Target :: enum(), Pname :: enum()) -> i()
gl:getBufferParameteriv/2 returns in Data a selected parameter of the buffer object
specified by Target.
External documentation.
getBufferSubData(Target :: enum(),
Offset :: i(),
Size :: i(),
Data :: mem()) ->
ok
gl:getBufferSubData/4 and glGetNamedBufferSubData return some or all of the data
contents of the data store of the specified buffer object. Data starting at byte
offset Offset and extending for Size bytes is copied from the buffer object's data
store to the memory pointed to by Data. An error is thrown if the buffer object is
currently mapped, or if Offset and Size together define a range beyond the bounds
of the buffer object's data store.
External documentation.
getClipPlane(Plane :: enum()) -> {f(), f(), f(), f()}
gl:getClipPlane/1 returns in Equation the four coefficients of the plane equation
for Plane.
External documentation.
getColorTable(Target :: enum(),
Format :: enum(),
Type :: enum(),
Table :: mem()) ->
ok
gl:getColorTable/4 returns in Table the contents of the color table specified by
Target. No pixel transfer operations are performed, but pixel storage modes that
are applicable to gl:readPixels/7 are performed.
External documentation.
getColorTableParameterfv(Target :: enum(), Pname :: enum()) ->
{f(), f(), f(), f()}
getColorTableParameteriv(Target :: enum(), Pname :: enum()) ->
{i(), i(), i(), i()}
Returns parameters specific to color table Target.
External documentation.
getCompressedTexImage(Target :: enum(), Lod :: i(), Img :: mem()) ->
ok
gl:getCompressedTexImage/3 and glGetnCompressedTexImage return the compressed
texture image associated with Target and Lod into Pixels.
glGetCompressedTextureImage serves the same purpose, but instead of taking a
texture target, it takes the ID of the texture object. Pixels should be an array of
BufSize bytes for glGetnCompresedTexImage and glGetCompressedTextureImage
functions, and of ?GL_TEXTURE_COMPRESSED_IMAGE_SIZE bytes in case of
gl:getCompressedTexImage/3. If the actual data takes less space than BufSize, the
remaining bytes will not be touched. Target specifies the texture target, to which
the texture the data the function should extract the data from is bound to. Lod
specifies the level-of-detail number of the desired image.
External documentation.
getConvolutionFilter(Target :: enum(),
Format :: enum(),
Type :: enum(),
Image :: mem()) ->
ok
gl:getConvolutionFilter/4 returns the current 1D or 2D convolution filter kernel as
an image. The one- or two-dimensional image is placed in Image according to the
specifications in Format and Type. No pixel transfer operations are performed on
this image, but the relevant pixel storage modes are applied.
External documentation.
getConvolutionParameterfv(Target :: enum(), Pname :: enum()) ->
{f(), f(), f(), f()}
getConvolutionParameteriv(Target :: enum(), Pname :: enum()) ->
{i(), i(), i(), i()}
gl:getConvolutionParameter() retrieves convolution parameters. Target determines
which convolution filter is queried. Pname determines which parameter is returned:
External documentation.
getDebugMessageLog(Count :: i(), BufSize :: i()) ->
{i(),
Sources :: [enum()],
Types :: [enum()],
Ids :: [i()],
Severities :: [enum()],
MessageLog :: string()}
gl:getDebugMessageLog/2 retrieves messages from the debug message log. A maximum of
Count messages are retrieved from the log. If Sources is not NULL then the source
of each message is written into up to Count elements of the array. If Types is not
NULL then the type of each message is written into up to Count elements of the
array. If Id is not NULL then the identifier of each message is written into up to
Count elements of the array. If Severities is not NULL then the severity of each
message is written into up to Count elements of the array. If Lengths is not NULL
then the length of each message is written into up to Count elements of the array.
External documentation.
getError() -> enum()
gl:getError/0 returns the value of the error flag. Each detectable error is
assigned a numeric code and symbolic name. When an error occurs, the error flag is
set to the appropriate error code value. No other errors are recorded until
gl:getError/0 is called, the error code is returned, and the flag is reset to
?GL_NO_ERROR. If a call to gl:getError/0 returns ?GL_NO_ERROR, there has been no
detectable error since the last call to gl:getError/0, or since the GL was
initialized.
External documentation.
getFragDataIndex(Program :: i(), Name :: string()) -> i()
gl:getFragDataIndex/2 returns the index of the fragment color to which the variable
Name was bound when the program object Program was last linked. If Name is not a
varying out variable of Program, or if an error occurs, -1 will be returned.
External documentation.
getFragDataLocation(Program :: i(), Name :: string()) -> i()
gl:getFragDataLocation/2 retrieves the assigned color number binding for the user-
defined varying out variable Name for program Program. Program must have previously
been linked. Name must be a null-terminated string. If Name is not the name of an
active user-defined varying out fragment shader variable within Program, -1 will be
returned.
External documentation.
getFramebufferAttachmentParameteriv(Target :: enum(),
Attachment :: enum(),
Pname :: enum()) ->
i()
gl:getFramebufferAttachmentParameteriv/3 and
glGetNamedFramebufferAttachmentParameteriv return parameters of attachments of a
specified framebuffer object.
External documentation.
getFramebufferParameteriv(Target :: enum(), Pname :: enum()) ->
i()
gl:getFramebufferParameteriv/2 and glGetNamedFramebufferParameteriv query
parameters of a specified framebuffer object.
External documentation.
getGraphicsResetStatus() -> enum()
Certain events can result in a reset of the GL context. Such a reset causes all
context state to be lost and requires the application to recreate all objects in
the affected context.
External documentation.
getHistogram(Target :: enum(),
Reset :: 0 | 1,
Format :: enum(),
Type :: enum(),
Values :: mem()) ->
ok
gl:getHistogram/5 returns the current histogram table as a one-dimensional image
with the same width as the histogram. No pixel transfer operations are performed on
this image, but pixel storage modes that are applicable to 1D images are honored.
External documentation.
getHistogramParameterfv(Target :: enum(), Pname :: enum()) ->
{f()}
getHistogramParameteriv(Target :: enum(), Pname :: enum()) ->
{i()}
gl:getHistogramParameter() is used to query parameter values for the current
histogram or for a proxy. The histogram state information may be queried by calling
gl:getHistogramParameter() with a Target of ?GL_HISTOGRAM (to obtain information
for the current histogram table) or ?GL_PROXY_HISTOGRAM (to obtain information from
the most recent proxy request) and one of the following values for the Pname
argument:
External documentation.
getInternalformati64v(Target :: enum(),
Internalformat :: enum(),
Pname :: enum(),
BufSize :: i()) ->
[i()]
getInternalformativ(Target :: enum(),
Internalformat :: enum(),
Pname :: enum(),
BufSize :: i()) ->
[i()]
gl:getInternalformativ/4 and gl:getInternalformati64v/4 retrieve information about
implementation-dependent support for internal formats. Target indicates the target
with which the internal format will be used and must be one of ?GL_RENDERBUFFER,
?GL_TEXTURE_2D_MULTISAMPLE, or ?GL_TEXTURE_2D_MULTISAMPLE_ARRAY, corresponding to
usage as a renderbuffer, two-dimensional multisample texture or two-dimensional
multisample array texture, respectively.
External documentation.
getLightfv(Light :: enum(), Pname :: enum()) ->
{f(), f(), f(), f()}
getLightiv(Light :: enum(), Pname :: enum()) ->
{i(), i(), i(), i()}
gl:getLight() returns in Params the value or values of a light source parameter.
Light names the light and is a symbolic name of the form ?GL_LIGHT i where i ranges
from 0 to the value of ?GL_MAX_LIGHTS - 1. ?GL_MAX_LIGHTS is an implementation
dependent constant that is greater than or equal to eight. Pname specifies one of
ten light source parameters, again by symbolic name.
External documentation.
getMapdv(Target :: enum(), Query :: enum(), V :: mem()) -> ok
getMapfv(Target :: enum(), Query :: enum(), V :: mem()) -> ok
getMapiv(Target :: enum(), Query :: enum(), V :: mem()) -> ok
glMap1 and glMap2 define evaluators. gl:getMap() returns evaluator parameters.
Target chooses a map, Query selects a specific parameter, and V points to storage
where the values will be returned.
External documentation.
getMaterialfv(Face :: enum(), Pname :: enum()) ->
{f(), f(), f(), f()}
getMaterialiv(Face :: enum(), Pname :: enum()) ->
{i(), i(), i(), i()}
gl:getMaterial() returns in Params the value or values of parameter Pname of
material Face. Six parameters are defined:
External documentation.
getMinmax(Target :: enum(),
Reset :: 0 | 1,
Format :: enum(),
Types :: enum(),
Values :: mem()) ->
ok
gl:getMinmax/5 returns the accumulated minimum and maximum pixel values (computed
on a per-component basis) in a one-dimensional image of width 2. The first set of
return values are the minima, and the second set of return values are the maxima.
The format of the return values is determined by Format, and their type is
determined by Types.
External documentation.
getMinmaxParameterfv(Target :: enum(), Pname :: enum()) -> {f()}
getMinmaxParameteriv(Target :: enum(), Pname :: enum()) -> {i()}
gl:getMinmaxParameter() retrieves parameters for the current minmax table by
setting Pname to one of the following values:
External documentation.
getMultisamplefv(Pname :: enum(), Index :: i()) -> {f(), f()}
gl:getMultisamplefv/2 queries the location of a given sample. Pname specifies the
sample parameter to retrieve and must be ?GL_SAMPLE_POSITION. Index corresponds to
the sample for which the location should be returned. The sample location is
returned as two floating-point values in Val[0] and Val[1], each between 0 and 1,
corresponding to the X and Y locations respectively in the GL pixel space of that
sample. (0.5, 0.5) this corresponds to the pixel center. Index must be between zero
and the value of ?GL_SAMPLES minus one.
External documentation.
getPixelMapfv(Map :: enum(), Values :: mem()) -> ok
getPixelMapuiv(Map :: enum(), Values :: mem()) -> ok
getPixelMapusv(Map :: enum(), Values :: mem()) -> ok
See the gl:pixelMap() reference page for a description of the acceptable values for
the Map parameter. gl:getPixelMap() returns in Data the contents of the pixel map
specified in Map. Pixel maps are used during the execution of gl:readPixels/7,
gl:drawPixels/5, gl:copyPixels/5, gl:texImage1D/8, gl:texImage2D/9,
gl:texImage3D/10, gl:texSubImage1D/7, gl:texSubImage2D/9, gl:texSubImage3D/11,
gl:copyTexImage1D/7, gl:copyTexImage2D/8, gl:copyTexSubImage1D/6,
gl:copyTexSubImage2D/8, and gl:copyTexSubImage3D/9. to map color indices, stencil
indices, color components, and depth components to other values.
External documentation.
getPolygonStipple() -> binary()
gl:getPolygonStipple/0 returns to Pattern a 32×32 polygon stipple pattern. The
pattern is packed into memory as if gl:readPixels/7 with both height and width of
32, type of ?GL_BITMAP, and format of ?GL_COLOR_INDEX were called, and the stipple
pattern were stored in an internal 32×32 color index buffer. Unlike
gl:readPixels/7, however, pixel transfer operations (shift, offset, pixel map) are
not applied to the returned stipple image.
External documentation.
getProgramiv(Program :: i(), Pname :: enum()) -> i()
gl:getProgram() returns in Params the value of a parameter for a specific program
object. The following parameters are defined:
External documentation.
getProgramBinary(Program :: i(), BufSize :: i()) ->
{BinaryFormat :: enum(), Binary :: binary()}
gl:getProgramBinary/2 returns a binary representation of the compiled and linked
executable for Program into the array of bytes whose address is specified in
Binary. The maximum number of bytes that may be written into Binary is specified by
BufSize. If the program binary is greater in size than BufSize bytes, then an error
is generated, otherwise the actual number of bytes written into Binary is returned
in the variable whose address is given by Length. If Length is ?NULL, then no
length is returned.
External documentation.
getProgramInfoLog(Program :: i(), BufSize :: i()) -> string()
gl:getProgramInfoLog/2 returns the information log for the specified program
object. The information log for a program object is modified when the program
object is linked or validated. The string that is returned will be null terminated.
External documentation.
getProgramInterfaceiv(Program :: i(),
ProgramInterface :: enum(),
Pname :: enum()) ->
i()
gl:getProgramInterfaceiv/3 queries the property of the interface identifed by
ProgramInterface in Program, the property name of which is given by Pname.
External documentation.
getProgramPipelineiv(Pipeline :: i(), Pname :: enum()) -> i()
gl:getProgramPipelineiv/2 retrieves the value of a property of the program pipeline
object Pipeline. Pname specifies the name of the parameter whose value to retrieve.
The value of the parameter is written to the variable whose address is given by
Params.
External documentation.
getProgramPipelineInfoLog(Pipeline :: i(), BufSize :: i()) ->
string()
gl:getProgramPipelineInfoLog/2 retrieves the info log for the program pipeline
object Pipeline. The info log, including its null terminator, is written into the
array of characters whose address is given by InfoLog. The maximum number of
characters that may be written into InfoLog is given by BufSize, and the actual
number of characters written into InfoLog is returned in the integer whose address
is given by Length. If Length is ?NULL, no length is returned.
External documentation.
getProgramResourceIndex(Program :: i(),
ProgramInterface :: enum(),
Name :: string()) ->
i()
gl:getProgramResourceIndex/3 returns the unsigned integer index assigned to a
resource named Name in the interface type ProgramInterface of program object
Program.
External documentation.
getProgramResourceLocation(Program :: i(),
ProgramInterface :: enum(),
Name :: string()) ->
i()
gl:getProgramResourceLocation/3 returns the location assigned to the variable named
Name in interface ProgramInterface of program object Program. Program must be the
name of a program that has been linked successfully. ProgramInterface must be one
of ?GL_UNIFORM, ?GL_PROGRAM_INPUT, ?GL_PROGRAM_OUTPUT,
?GL_VERTEX_SUBROUTINE_UNIFORM, ?GL_TESS_CONTROL_SUBROUTINE_UNIFORM,
?GL_TESS_EVALUATION_SUBROUTINE_UNIFORM, ?GL_GEOMETRY_SUBROUTINE_UNIFORM,
?GL_FRAGMENT_SUBROUTINE_UNIFORM, ?GL_COMPUTE_SUBROUTINE_UNIFORM, or
?GL_TRANSFORM_FEEDBACK_BUFFER.
External documentation.
getProgramResourceLocationIndex(Program :: i(),
ProgramInterface :: enum(),
Name :: string()) ->
i()
gl:getProgramResourceLocationIndex/3 returns the fragment color index assigned to
the variable named Name in interface ProgramInterface of program object Program.
Program must be the name of a program that has been linked successfully.
ProgramInterface must be ?GL_PROGRAM_OUTPUT.
External documentation.
getProgramResourceName(Program :: i(),
ProgramInterface :: enum(),
Index :: i(),
BufSize :: i()) ->
string()
gl:getProgramResourceName/4 retrieves the name string assigned to the single active
resource with an index of Index in the interface ProgramInterface of program object
Program. Index must be less than the number of entries in the active resource list
for ProgramInterface.
External documentation.
getProgramStageiv(Program :: i(),
Shadertype :: enum(),
Pname :: enum()) ->
i()
gl:getProgramStage() queries a parameter of a shader stage attached to a program
object. Program contains the name of the program to which the shader is attached.
Shadertype specifies the stage from which to query the parameter. Pname specifies
which parameter should be queried. The value or values of the parameter to be
queried is returned in the variable whose address is given in Values.
External documentation.
getQueryIndexediv(Target :: enum(), Index :: i(), Pname :: enum()) ->
i()
gl:getQueryIndexediv/3 returns in Params a selected parameter of the indexed query
object target specified by Target and Index. Index specifies the index of the query
object target and must be between zero and a target-specific maxiumum.
External documentation.
getQueryBufferObjecti64v(Id :: i(),
Buffer :: i(),
Pname :: enum(),
Offset :: i()) ->
ok
getQueryBufferObjectiv(Id :: i(),
Buffer :: i(),
Pname :: enum(),
Offset :: i()) ->
ok
getQueryBufferObjectui64v(Id :: i(),
Buffer :: i(),
Pname :: enum(),
Offset :: i()) ->
ok
getQueryBufferObjectuiv(Id :: i(),
Buffer :: i(),
Pname :: enum(),
Offset :: i()) ->
ok
getQueryObjecti64v(Id :: i(), Pname :: enum()) -> i()
getQueryObjectiv(Id :: i(), Pname :: enum()) -> i()
getQueryObjectui64v(Id :: i(), Pname :: enum()) -> i()
getQueryObjectuiv(Id :: i(), Pname :: enum()) -> i()
These commands return a selected parameter of the query object specified by Id.
gl:getQueryObject() returns in Params a selected parameter of the query object
specified by Id. gl:getQueryBufferObject() returns in Buffer a selected parameter
of the query object specified by Id, by writing it to Buffer's data store at the
byte offset specified by Offset.
External documentation.
getQueryiv(Target :: enum(), Pname :: enum()) -> i()
gl:getQueryiv/2 returns in Params a selected parameter of the query object target
specified by Target.
External documentation.
getRenderbufferParameteriv(Target :: enum(), Pname :: enum()) ->
i()
gl:getRenderbufferParameteriv/2 and glGetNamedRenderbufferParameteriv query
parameters of a specified renderbuffer object.
External documentation.
getSamplerParameterIiv(Sampler :: i(), Pname :: enum()) -> [i()]
getSamplerParameterIuiv(Sampler :: i(), Pname :: enum()) -> [i()]
getSamplerParameterfv(Sampler :: i(), Pname :: enum()) -> [f()]
getSamplerParameteriv(Sampler :: i(), Pname :: enum()) -> [i()]
gl:getSamplerParameter() returns in Params the value or values of the sampler
parameter specified as Pname. Sampler defines the target sampler, and must be the
name of an existing sampler object, returned from a previous call to
gl:genSamplers/1. Pname accepts the same symbols as gl:samplerParameter(), with the
same interpretations:
External documentation.
getShaderiv(Shader :: i(), Pname :: enum()) -> i()
gl:getShader() returns in Params the value of a parameter for a specific shader
object. The following parameters are defined:
External documentation.
getShaderInfoLog(Shader :: i(), BufSize :: i()) -> string()
gl:getShaderInfoLog/2 returns the information log for the specified shader object.
The information log for a shader object is modified when the shader is compiled.
The string that is returned will be null terminated.
External documentation.
getShaderPrecisionFormat(Shadertype :: enum(),
Precisiontype :: enum()) ->
{Range :: {i(), i()},
Precision :: i()}
gl:getShaderPrecisionFormat/2 retrieves the numeric range and precision for the
implementation's representation of quantities in different numeric formats in
specified shader type. ShaderType specifies the type of shader for which the
numeric precision and range is to be retrieved and must be one of ?GL_VERTEX_SHADER
or ?GL_FRAGMENT_SHADER. PrecisionType specifies the numeric format to query and
must be one of ?GL_LOW_FLOAT, ?GL_MEDIUM_FLOAT?GL_HIGH_FLOAT, ?GL_LOW_INT,
?GL_MEDIUM_INT, or ?GL_HIGH_INT.
External documentation.
getShaderSource(Shader :: i(), BufSize :: i()) -> string()
gl:getShaderSource/2 returns the concatenation of the source code strings from the
shader object specified by Shader. The source code strings for a shader object are
the result of a previous call to gl:shaderSource/2. The string returned by the
function will be null terminated.
External documentation.
getString(Name :: enum()) -> string()
getStringi(Name :: enum(), Index :: i()) -> string()
gl:getString/1 returns a pointer to a static string describing some aspect of the
current GL connection. Name can be one of the following:
External documentation.
getSubroutineIndex(Program :: i(),
Shadertype :: enum(),
Name :: string()) ->
i()
gl:getSubroutineIndex/3 returns the index of a subroutine uniform within a shader
stage attached to a program object. Program contains the name of the program to
which the shader is attached. Shadertype specifies the stage from which to query
shader subroutine index. Name contains the null-terminated name of the subroutine
uniform whose name to query.
External documentation.
getSubroutineUniformLocation(Program :: i(),
Shadertype :: enum(),
Name :: string()) ->
i()
gl:getSubroutineUniformLocation/3 returns the location of the subroutine uniform
variable Name in the shader stage of type Shadertype attached to Program, with
behavior otherwise identical to gl:getUniformLocation/2.
External documentation.
getSynciv(Sync :: i(), Pname :: enum(), BufSize :: i()) -> [i()]
gl:getSynciv/3 retrieves properties of a sync object. Sync specifies the name of
the sync object whose properties to retrieve.
External documentation.
getTexEnvfv(Target :: enum(), Pname :: enum()) ->
{f(), f(), f(), f()}
getTexEnviv(Target :: enum(), Pname :: enum()) ->
{i(), i(), i(), i()}
gl:getTexEnv() returns in Params selected values of a texture environment that was
specified with gl:texEnv(). Target specifies a texture environment.
External documentation.
getTexGendv(Coord :: enum(), Pname :: enum()) ->
{f(), f(), f(), f()}
getTexGenfv(Coord :: enum(), Pname :: enum()) ->
{f(), f(), f(), f()}
getTexGeniv(Coord :: enum(), Pname :: enum()) ->
{i(), i(), i(), i()}
gl:getTexGen() returns in Params selected parameters of a texture coordinate
generation function that was specified using gl:texGen(). Coord names one of the
(s, t, r, q) texture coordinates, using the symbolic constant ?GL_S, ?GL_T, ?GL_R,
or ?GL_Q.
External documentation.
getTexImage(Target :: enum(),
Level :: i(),
Format :: enum(),
Type :: enum(),
Pixels :: mem()) ->
ok
gl:getTexImage/5, glGetnTexImage and glGetTextureImage functions return a texture
image into Pixels. For gl:getTexImage/5 and glGetnTexImage, Target specifies
whether the desired texture image is one specified by gl:texImage1D/8
(?GL_TEXTURE_1D), gl:texImage2D/9 (?GL_TEXTURE_1D_ARRAY, ?GL_TEXTURE_RECTANGLE,
?GL_TEXTURE_2D or any of ?GL_TEXTURE_CUBE_MAP_*), or gl:texImage3D/10
(?GL_TEXTURE_2D_ARRAY, ?GL_TEXTURE_3D, ?GL_TEXTURE_CUBE_MAP_ARRAY). For
glGetTextureImage, Texture specifies the texture object name. In addition to types
of textures accepted by gl:getTexImage/5 and glGetnTexImage, the function also
accepts cube map texture objects (with effective target ?GL_TEXTURE_CUBE_MAP).
Level specifies the level-of-detail number of the desired image. Format and Type
specify the format and type of the desired image array. See the reference page for
gl:texImage1D/8 for a description of the acceptable values for the Format and Type
parameters, respectively. For glGetnTexImage and glGetTextureImage functions,
bufSize tells the size of the buffer to receive the retrieved pixel data.
glGetnTexImage and glGetTextureImage do not write more than BufSize bytes into
Pixels.
External documentation.
getTexLevelParameterfv(Target :: enum(),
Level :: i(),
Pname :: enum()) ->
{f()}
getTexLevelParameteriv(Target :: enum(),
Level :: i(),
Pname :: enum()) ->
{i()}
gl:getTexLevelParameterfv/3, gl:getTexLevelParameteriv/3,
glGetTextureLevelParameterfv and glGetTextureLevelParameteriv return in Params
texture parameter values for a specific level-of-detail value, specified as Level.
For the first two functions, Target defines the target texture, either
?GL_TEXTURE_1D, ?GL_TEXTURE_2D, ?GL_TEXTURE_3D, ?GL_PROXY_TEXTURE_1D,
?GL_PROXY_TEXTURE_2D, ?GL_PROXY_TEXTURE_3D, ?GL_TEXTURE_CUBE_MAP_POSITIVE_X,
?GL_TEXTURE_CUBE_MAP_NEGATIVE_X, ?GL_TEXTURE_CUBE_MAP_POSITIVE_Y,
?GL_TEXTURE_CUBE_MAP_NEGATIVE_Y, ?GL_TEXTURE_CUBE_MAP_POSITIVE_Z,
?GL_TEXTURE_CUBE_MAP_NEGATIVE_Z, or ?GL_PROXY_TEXTURE_CUBE_MAP. The remaining two
take a Texture argument which specifies the name of the texture object.
External documentation.
getTexParameterIiv(Target :: enum(), Pname :: enum()) ->
{i(), i(), i(), i()}
getTexParameterIuiv(Target :: enum(), Pname :: enum()) ->
{i(), i(), i(), i()}
getTexParameterfv(Target :: enum(), Pname :: enum()) ->
{f(), f(), f(), f()}
getTexParameteriv(Target :: enum(), Pname :: enum()) ->
{i(), i(), i(), i()}
gl:getTexParameter() and glGetTextureParameter return in Params the value or values
of the texture parameter specified as Pname. Target defines the target texture.
?GL_TEXTURE_1D, ?GL_TEXTURE_2D, ?GL_TEXTURE_3D, ?GL_TEXTURE_1D_ARRAY,
?GL_TEXTURE_2D_ARRAY, ?GL_TEXTURE_RECTANGLE, ?GL_TEXTURE_CUBE_MAP,
?GL_TEXTURE_CUBE_MAP_ARRAY, ?GL_TEXTURE_2D_MULTISAMPLE, or
?GL_TEXTURE_2D_MULTISAMPLE_ARRAY specify one-, two-, or three-dimensional, one-
dimensional array, two-dimensional array, rectangle, cube-mapped or cube-mapped
array, two-dimensional multisample, or two-dimensional multisample array texturing,
respectively. Pname accepts the same symbols as gl:texParameter(), with the same
interpretations:
External documentation.
getTransformFeedbackVarying(Program :: i(),
Index :: i(),
BufSize :: i()) ->
{Size :: i(),
Type :: enum(),
Name :: string()}
Information about the set of varying variables in a linked program that will be
captured during transform feedback may be retrieved by calling
gl:getTransformFeedbackVarying/3. gl:getTransformFeedbackVarying/3 provides
information about the varying variable selected by Index. An Index of 0 selects the
first varying variable specified in the Varyings array passed to
gl:transformFeedbackVaryings/3, and an Index of the value of
?GL_TRANSFORM_FEEDBACK_VARYINGS minus one selects the last such variable.
External documentation.
getUniformdv(Program :: i(), Location :: i()) -> matrix()
getUniformfv(Program :: i(), Location :: i()) -> matrix()
getUniformiv(Program :: i(), Location :: i()) ->
{i(),
i(),
i(),
i(),
i(),
i(),
i(),
i(),
i(),
i(),
i(),
i(),
i(),
i(),
i(),
i()}
getUniformuiv(Program :: i(), Location :: i()) ->
{i(),
i(),
i(),
i(),
i(),
i(),
i(),
i(),
i(),
i(),
i(),
i(),
i(),
i(),
i(),
i()}
gl:getUniform() and glGetnUniform return in Params the value(s) of the specified
uniform variable. The type of the uniform variable specified by Location determines
the number of values returned. If the uniform variable is defined in the shader as
a boolean, int, or float, a single value will be returned. If it is defined as a
vec2, ivec2, or bvec2, two values will be returned. If it is defined as a vec3,
ivec3, or bvec3, three values will be returned, and so on. To query values stored
in uniform variables declared as arrays, call gl:getUniform() for each element of
the array. To query values stored in uniform variables declared as structures, call
gl:getUniform() for each field in the structure. The values for uniform variables
declared as a matrix will be returned in column major order.
External documentation.
getUniformBlockIndex(Program :: i(), UniformBlockName :: string()) ->
i()
gl:getUniformBlockIndex/2 retrieves the index of a uniform block within Program.
External documentation.
getUniformIndices(Program :: i(),
UniformNames :: [unicode:chardata()]) ->
[i()]
gl:getUniformIndices/2 retrieves the indices of a number of uniforms within
Program.
External documentation.
getUniformLocation(Program :: i(), Name :: string()) -> i()
glGetUniformLocation returns an integer that represents the location of a specific
uniform variable within a program object. Name must be a null terminated string
that contains no white space. Name must be an active uniform variable name in
Program that is not a structure, an array of structures, or a subcomponent of a
vector or a matrix. This function returns -1 if Name does not correspond to an
active uniform variable in Program, if Name starts with the reserved prefix "gl_",
or if Name is associated with an atomic counter or a named uniform block.
External documentation.
getUniformSubroutineuiv(Shadertype :: enum(), Location :: i()) ->
{i(),
i(),
i(),
i(),
i(),
i(),
i(),
i(),
i(),
i(),
i(),
i(),
i(),
i(),
i(),
i()}
gl:getUniformSubroutine() retrieves the value of the subroutine uniform at location
Location for shader stage Shadertype of the current program. Location must be less
than the value of ?GL_ACTIVE_SUBROUTINE_UNIFORM_LOCATIONS for the shader currently
in use at shader stage Shadertype. The value of the subroutine uniform is returned
in Values.
External documentation.
getVertexAttribIiv(Index :: i(), Pname :: enum()) ->
{i(), i(), i(), i()}
getVertexAttribIuiv(Index :: i(), Pname :: enum()) ->
{i(), i(), i(), i()}
getVertexAttribLdv(Index :: i(), Pname :: enum()) ->
{f(), f(), f(), f()}
getVertexAttribdv(Index :: i(), Pname :: enum()) ->
{f(), f(), f(), f()}
getVertexAttribfv(Index :: i(), Pname :: enum()) ->
{f(), f(), f(), f()}
getVertexAttribiv(Index :: i(), Pname :: enum()) ->
{i(), i(), i(), i()}
gl:getVertexAttrib() returns in Params the value of a generic vertex attribute
parameter. The generic vertex attribute to be queried is specified by Index, and
the parameter to be queried is specified by Pname.
External documentation.
hint(Target :: enum(), Mode :: enum()) -> ok
Certain aspects of GL behavior, when there is room for interpretation, can be
controlled with hints. A hint is specified with two arguments. Target is a symbolic
constant indicating the behavior to be controlled, and Mode is another symbolic
constant indicating the desired behavior. The initial value for each Target is
?GL_DONT_CARE. Mode can be one of the following:
External documentation.
histogram(Target :: enum(),
Width :: i(),
Internalformat :: enum(),
Sink :: 0 | 1) ->
ok
When ?GL_HISTOGRAM is enabled, RGBA color components are converted to histogram
table indices by clamping to the range [0,1], multiplying by the width of the
histogram table, and rounding to the nearest integer. The table entries selected by
the RGBA indices are then incremented. (If the internal format of the histogram
table includes luminance, then the index derived from the R color component
determines the luminance table entry to be incremented.) If a histogram table entry
is incremented beyond its maximum value, then its value becomes undefined. (This is
not an error.)
External documentation.
indexd(C :: f()) -> ok
indexdv(X1 :: {C :: f()}) -> ok
indexf(C :: f()) -> ok
indexfv(X1 :: {C :: f()}) -> ok
indexi(C :: i()) -> ok
indexiv(X1 :: {C :: i()}) -> ok
indexs(C :: i()) -> ok
indexsv(X1 :: {C :: i()}) -> ok
indexub(C :: i()) -> ok
indexubv(X1 :: {C :: i()}) -> ok
gl:index() updates the current (single-valued) color index. It takes one argument,
the new value for the current color index.
External documentation.
indexMask(Mask :: i()) -> ok
gl:indexMask/1 controls the writing of individual bits in the color index buffers.
The least significant n bits of Mask, where n is the number of bits in a color
index buffer, specify a mask. Where a 1 (one) appears in the mask, it's possible to
write to the corresponding bit in the color index buffer (or buffers). Where a 0
(zero) appears, the corresponding bit is write-protected.
External documentation.
indexPointer(Type :: enum(),
Stride :: i(),
Ptr :: offset() | mem()) ->
ok
gl:indexPointer/3 specifies the location and data format of an array of color
indexes to use when rendering. Type specifies the data type of each color index and
Stride specifies the byte stride from one color index to the next, allowing
vertices and attributes to be packed into a single array or stored in separate
arrays.
External documentation.
initNames() -> ok
The name stack is used during selection mode to allow sets of rendering commands to
be uniquely identified. It consists of an ordered set of unsigned integers.
gl:initNames/0 causes the name stack to be initialized to its default empty state.
External documentation.
interleavedArrays(Format :: enum(),
Stride :: i(),
Pointer :: offset() | mem()) ->
ok
gl:interleavedArrays/3 lets you specify and enable individual color, normal,
texture and vertex arrays whose elements are part of a larger aggregate array
element. For some implementations, this is more efficient than specifying the
arrays separately.
External documentation.
invalidateBufferData(Buffer :: i()) -> ok
gl:invalidateBufferData/1 invalidates all of the content of the data store of a
buffer object. After invalidation, the content of the buffer's data store becomes
undefined.
External documentation.
invalidateBufferSubData(Buffer :: i(),
Offset :: i(),
Length :: i()) ->
ok
gl:invalidateBufferSubData/3 invalidates all or part of the content of the data
store of a buffer object. After invalidation, the content of the specified range of
the buffer's data store becomes undefined. The start of the range is given by
Offset and its size is given by Length, both measured in basic machine units.
External documentation.
invalidateFramebuffer(Target :: enum(), Attachments :: [enum()]) ->
ok
gl:invalidateFramebuffer/2 and glInvalidateNamedFramebufferData invalidate the
entire contents of a specified set of attachments of a framebuffer.
External documentation.
invalidateSubFramebuffer(Target :: enum(),
Attachments :: [enum()],
X :: i(),
Y :: i(),
Width :: i(),
Height :: i()) ->
ok
gl:invalidateSubFramebuffer/6 and glInvalidateNamedFramebufferSubData invalidate
the contents of a specified region of a specified set of attachments of a
framebuffer.
External documentation.
invalidateTexImage(Texture :: i(), Level :: i()) -> ok
gl:invalidateTexSubImage/8 invalidates all of a texture image. Texture and Level
indicated which texture image is being invalidated. After this command, data in the
texture image has undefined values.
External documentation.
invalidateTexSubImage(Texture, Level, Xoffset, Yoffset, Zoffset,
Width, Height, Depth) ->
ok
Types:
Texture = Level = Xoffset = Yoffset = Zoffset = Width = Height = Depth = i()
gl:invalidateTexSubImage/8 invalidates all or part of a texture image. Texture and
Level indicated which texture image is being invalidated. After this command, data
in that subregion have undefined values. Xoffset, Yoffset, Zoffset, Width, Height,
and Depth are interpreted as they are in gl:texSubImage3D/11. For texture targets
that don't have certain dimensions, this command treats those dimensions as having
a size of 1. For example, to invalidate a portion of a two- dimensional texture,
the application would use Zoffset equal to zero and Depth equal to one. Cube map
textures are treated as an array of six slices in the z-dimension, where a value of
Zoffset is interpreted as specifying face ?GL_TEXTURE_CUBE_MAP_POSITIVE_X +
Zoffset.
External documentation.
isBuffer(Buffer :: i()) -> 0 | 1
gl:isBuffer/1 returns ?GL_TRUE if Buffer is currently the name of a buffer object.
If Buffer is zero, or is a non-zero value that is not currently the name of a
buffer object, or if an error occurs, gl:isBuffer/1 returns ?GL_FALSE.
External documentation.
isEnabled(Cap :: enum()) -> 0 | 1
isEnabledi(Target :: enum(), Index :: i()) -> 0 | 1
gl:isEnabled/1 returns ?GL_TRUE if Cap is an enabled capability and returns
?GL_FALSE otherwise. Boolean states that are indexed may be tested with
gl:isEnabledi/2. For gl:isEnabledi/2, Index specifies the index of the capability
to test. Index must be between zero and the count of indexed capabilities for Cap.
Initially all capabilities except ?GL_DITHER are disabled; ?GL_DITHER is initially
enabled.
External documentation.
isFramebuffer(Framebuffer :: i()) -> 0 | 1
gl:isFramebuffer/1 returns ?GL_TRUE if Framebuffer is currently the name of a
framebuffer object. If Framebuffer is zero, or if ?framebuffer is not the name of a
framebuffer object, or if an error occurs, gl:isFramebuffer/1 returns ?GL_FALSE. If
Framebuffer is a name returned by gl:genFramebuffers/1, by that has not yet been
bound through a call to gl:bindFramebuffer/2, then the name is not a framebuffer
object and gl:isFramebuffer/1 returns ?GL_FALSE.
External documentation.
isList(List :: i()) -> 0 | 1
gl:isList/1 returns ?GL_TRUE if List is the name of a display list and returns
?GL_FALSE if it is not, or if an error occurs.
External documentation.
isProgram(Program :: i()) -> 0 | 1
gl:isProgram/1 returns ?GL_TRUE if Program is the name of a program object
previously created with gl:createProgram/0 and not yet deleted with
gl:deleteProgram/1. If Program is zero or a non-zero value that is not the name of
a program object, or if an error occurs, gl:isProgram/1 returns ?GL_FALSE.
External documentation.
isProgramPipeline(Pipeline :: i()) -> 0 | 1
gl:isProgramPipeline/1 returns ?GL_TRUE if Pipeline is currently the name of a
program pipeline object. If Pipeline is zero, or if ?pipeline is not the name of a
program pipeline object, or if an error occurs, gl:isProgramPipeline/1 returns
?GL_FALSE. If Pipeline is a name returned by gl:genProgramPipelines/1, but that has
not yet been bound through a call to gl:bindProgramPipeline/1, then the name is not
a program pipeline object and gl:isProgramPipeline/1 returns ?GL_FALSE.
External documentation.
isQuery(Id :: i()) -> 0 | 1
gl:isQuery/1 returns ?GL_TRUE if Id is currently the name of a query object. If Id
is zero, or is a non-zero value that is not currently the name of a query object,
or if an error occurs, gl:isQuery/1 returns ?GL_FALSE.
External documentation.
isRenderbuffer(Renderbuffer :: i()) -> 0 | 1
gl:isRenderbuffer/1 returns ?GL_TRUE if Renderbuffer is currently the name of a
renderbuffer object. If Renderbuffer is zero, or if Renderbuffer is not the name of
a renderbuffer object, or if an error occurs, gl:isRenderbuffer/1 returns
?GL_FALSE. If Renderbuffer is a name returned by gl:genRenderbuffers/1, by that has
not yet been bound through a call to gl:bindRenderbuffer/2 or
gl:framebufferRenderbuffer/4, then the name is not a renderbuffer object and
gl:isRenderbuffer/1 returns ?GL_FALSE.
External documentation.
isSampler(Sampler :: i()) -> 0 | 1
gl:isSampler/1 returns ?GL_TRUE if Id is currently the name of a sampler object. If
Id is zero, or is a non-zero value that is not currently the name of a sampler
object, or if an error occurs, gl:isSampler/1 returns ?GL_FALSE.
External documentation.
isShader(Shader :: i()) -> 0 | 1
gl:isShader/1 returns ?GL_TRUE if Shader is the name of a shader object previously
created with gl:createShader/1 and not yet deleted with gl:deleteShader/1. If
Shader is zero or a non-zero value that is not the name of a shader object, or if
an error occurs, glIsShader returns ?GL_FALSE.
External documentation.
isSync(Sync :: i()) -> 0 | 1
gl:isSync/1 returns ?GL_TRUE if Sync is currently the name of a sync object. If
Sync is not the name of a sync object, or if an error occurs, gl:isSync/1 returns
?GL_FALSE. Note that zero is not the name of a sync object.
External documentation.
isTexture(Texture :: i()) -> 0 | 1
gl:isTexture/1 returns ?GL_TRUE if Texture is currently the name of a texture. If
Texture is zero, or is a non-zero value that is not currently the name of a
texture, or if an error occurs, gl:isTexture/1 returns ?GL_FALSE.
External documentation.
isTransformFeedback(Id :: i()) -> 0 | 1
gl:isTransformFeedback/1 returns ?GL_TRUE if Id is currently the name of a
transform feedback object. If Id is zero, or if ?id is not the name of a transform
feedback object, or if an error occurs, gl:isTransformFeedback/1 returns ?GL_FALSE.
If Id is a name returned by gl:genTransformFeedbacks/1, but that has not yet been
bound through a call to gl:bindTransformFeedback/2, then the name is not a
transform feedback object and gl:isTransformFeedback/1 returns ?GL_FALSE.
External documentation.
isVertexArray(Array :: i()) -> 0 | 1
gl:isVertexArray/1 returns ?GL_TRUE if Array is currently the name of a vertex
array object. If Array is zero, or if Array is not the name of a vertex array
object, or if an error occurs, gl:isVertexArray/1 returns ?GL_FALSE. If Array is a
name returned by gl:genVertexArrays/1, by that has not yet been bound through a
call to gl:bindVertexArray/1, then the name is not a vertex array object and
gl:isVertexArray/1 returns ?GL_FALSE.
External documentation.
lightf(Light :: enum(), Pname :: enum(), Param :: f()) -> ok
lightfv(Light :: enum(), Pname :: enum(), Params :: tuple()) -> ok
lighti(Light :: enum(), Pname :: enum(), Param :: i()) -> ok
lightiv(Light :: enum(), Pname :: enum(), Params :: tuple()) -> ok
gl:light() sets the values of individual light source parameters. Light names the
light and is a symbolic name of the form ?GL_LIGHT i, where i ranges from 0 to the
value of ?GL_MAX_LIGHTS - 1. Pname specifies one of ten light source parameters,
again by symbolic name. Params is either a single value or a pointer to an array
that contains the new values.
External documentation.
lightModelf(Pname :: enum(), Param :: f()) -> ok
lightModelfv(Pname :: enum(), Params :: tuple()) -> ok
lightModeli(Pname :: enum(), Param :: i()) -> ok
lightModeliv(Pname :: enum(), Params :: tuple()) -> ok
gl:lightModel() sets the lighting model parameter. Pname names a parameter and
Params gives the new value. There are three lighting model parameters:
External documentation.
lineStipple(Factor :: i(), Pattern :: i()) -> ok
Line stippling masks out certain fragments produced by rasterization; those
fragments will not be drawn. The masking is achieved by using three parameters: the
16-bit line stipple pattern Pattern, the repeat count Factor, and an integer
stipple counter s.
External documentation.
lineWidth(Width :: f()) -> ok
gl:lineWidth/1 specifies the rasterized width of both aliased and antialiased
lines. Using a line width other than 1 has different effects, depending on whether
line antialiasing is enabled. To enable and disable line antialiasing, call
gl:enable/1 and gl:disable/1 with argument ?GL_LINE_SMOOTH. Line antialiasing is
initially disabled.
External documentation.
linkProgram(Program :: i()) -> ok
gl:linkProgram/1 links the program object specified by Program. If any shader
objects of type ?GL_VERTEX_SHADER are attached to Program, they will be used to
create an executable that will run on the programmable vertex processor. If any
shader objects of type ?GL_GEOMETRY_SHADER are attached to Program, they will be
used to create an executable that will run on the programmable geometry processor.
If any shader objects of type ?GL_FRAGMENT_SHADER are attached to Program, they
will be used to create an executable that will run on the programmable fragment
processor.
External documentation.
listBase(Base :: i()) -> ok
gl:callLists/1 specifies an array of offsets. Display-list names are generated by
adding Base to each offset. Names that reference valid display lists are executed;
the others are ignored.
External documentation.
loadIdentity() -> ok
gl:loadIdentity/0 replaces the current matrix with the identity matrix. It is
semantically equivalent to calling gl:loadMatrix() with the identity matrix
External documentation.
loadMatrixd(M :: matrix()) -> ok
loadMatrixf(M :: matrix()) -> ok
gl:loadMatrix() replaces the current matrix with the one whose elements are
specified by M. The current matrix is the projection matrix, modelview matrix, or
texture matrix, depending on the current matrix mode (see gl:matrixMode/1).
External documentation.
loadName(Name :: i()) -> ok
The name stack is used during selection mode to allow sets of rendering commands to
be uniquely identified. It consists of an ordered set of unsigned integers and is
initially empty.
External documentation.
loadTransposeMatrixd(M :: matrix()) -> ok
loadTransposeMatrixf(M :: matrix()) -> ok
gl:loadTransposeMatrix() replaces the current matrix with the one whose elements
are specified by M. The current matrix is the projection matrix, modelview matrix,
or texture matrix, depending on the current matrix mode (see gl:matrixMode/1).
External documentation.
logicOp(Opcode :: enum()) -> ok
gl:logicOp/1 specifies a logical operation that, when enabled, is applied between
the incoming RGBA color and the RGBA color at the corresponding location in the
frame buffer. To enable or disable the logical operation, call gl:enable/1 and
gl:disable/1 using the symbolic constant ?GL_COLOR_LOGIC_OP. The initial value is
disabled.
External documentation.
map1d(Target :: enum(),
U1 :: f(),
U2 :: f(),
Stride :: i(),
Order :: i(),
Points :: binary()) ->
ok
map1f(Target :: enum(),
U1 :: f(),
U2 :: f(),
Stride :: i(),
Order :: i(),
Points :: binary()) ->
ok
Evaluators provide a way to use polynomial or rational polynomial mapping to
produce vertices, normals, texture coordinates, and colors. The values produced by
an evaluator are sent to further stages of GL processing just as if they had been
presented using gl:vertex(), gl:normal(), gl:texCoord(), and gl:color() commands,
except that the generated values do not update the current normal, texture
coordinates, or color.
External documentation.
map2d(Target, U1, U2, Ustride, Uorder, V1, V2, Vstride, Vorder,
Points) ->
ok
map2f(Target, U1, U2, Ustride, Uorder, V1, V2, Vstride, Vorder,
Points) ->
ok
Types:
Target = enum()
U1 = U2 = f()
Ustride = Uorder = i()
V1 = V2 = f()
Vstride = Vorder = i()
Points = binary()
Evaluators provide a way to use polynomial or rational polynomial mapping to
produce vertices, normals, texture coordinates, and colors. The values produced by
an evaluator are sent on to further stages of GL processing just as if they had
been presented using gl:vertex(), gl:normal(), gl:texCoord(), and gl:color()
commands, except that the generated values do not update the current normal,
texture coordinates, or color.
External documentation.
mapGrid1d(Un :: i(), U1 :: f(), U2 :: f()) -> ok
mapGrid1f(Un :: i(), U1 :: f(), U2 :: f()) -> ok
mapGrid2d(Un :: i(),
U1 :: f(),
U2 :: f(),
Vn :: i(),
V1 :: f(),
V2 :: f()) ->
ok
mapGrid2f(Un :: i(),
U1 :: f(),
U2 :: f(),
Vn :: i(),
V1 :: f(),
V2 :: f()) ->
ok
gl:mapGrid() and gl:evalMesh() are used together to efficiently generate and
evaluate a series of evenly-spaced map domain values. gl:evalMesh() steps through
the integer domain of a one- or two-dimensional grid, whose range is the domain of
the evaluation maps specified by glMap1 and glMap2.
External documentation.
materialf(Face :: enum(), Pname :: enum(), Param :: f()) -> ok
materialfv(Face :: enum(), Pname :: enum(), Params :: tuple()) ->
ok
materiali(Face :: enum(), Pname :: enum(), Param :: i()) -> ok
materialiv(Face :: enum(), Pname :: enum(), Params :: tuple()) ->
ok
gl:material() assigns values to material parameters. There are two matched sets of
material parameters. One, the front-facing set, is used to shade points, lines,
bitmaps, and all polygons (when two-sided lighting is disabled), or just front-
facing polygons (when two-sided lighting is enabled). The other set, back-facing,
is used to shade back-facing polygons only when two-sided lighting is enabled.
Refer to the gl:lightModel() reference page for details concerning one- and two-
sided lighting calculations.
External documentation.
matrixMode(Mode :: enum()) -> ok
gl:matrixMode/1 sets the current matrix mode. Mode can assume one of four values:
External documentation.
memoryBarrier(Barriers :: i()) -> ok
memoryBarrierByRegion(Barriers :: i()) -> ok
gl:memoryBarrier/1 defines a barrier ordering the memory transactions issued prior
to the command relative to those issued after the barrier. For the purposes of this
ordering, memory transactions performed by shaders are considered to be issued by
the rendering command that triggered the execution of the shader. Barriers is a
bitfield indicating the set of operations that are synchronized with shader stores;
the bits used in Barriers are as follows:
External documentation.
minSampleShading(Value :: f()) -> ok
gl:minSampleShading/1 specifies the rate at which samples are shaded within a
covered pixel. Sample-rate shading is enabled by calling gl:enable/1 with the
parameter ?GL_SAMPLE_SHADING. If ?GL_MULTISAMPLE or ?GL_SAMPLE_SHADING is disabled,
sample shading has no effect. Otherwise, an implementation must provide at least as
many unique color values for each covered fragment as specified by Value times
Samples where Samples is the value of ?GL_SAMPLES for the current framebuffer. At
least 1 sample for each covered fragment is generated.
External documentation.
minmax(Target :: enum(), Internalformat :: enum(), Sink :: 0 | 1) ->
ok
When ?GL_MINMAX is enabled, the RGBA components of incoming pixels are compared to
the minimum and maximum values for each component, which are stored in the two-
element minmax table. (The first element stores the minima, and the second element
stores the maxima.) If a pixel component is greater than the corresponding
component in the maximum element, then the maximum element is updated with the
pixel component value. If a pixel component is less than the corresponding
component in the minimum element, then the minimum element is updated with the
pixel component value. (In both cases, if the internal format of the minmax table
includes luminance, then the R color component of incoming pixels is used for
comparison.) The contents of the minmax table may be retrieved at a later time by
calling gl:getMinmax/5. The minmax operation is enabled or disabled by calling
gl:enable/1 or gl:disable/1, respectively, with an argument of ?GL_MINMAX.
External documentation.
multMatrixd(M :: matrix()) -> ok
multMatrixf(M :: matrix()) -> ok
gl:multMatrix() multiplies the current matrix with the one specified using M, and
replaces the current matrix with the product.
External documentation.
multTransposeMatrixd(M :: matrix()) -> ok
multTransposeMatrixf(M :: matrix()) -> ok
gl:multTransposeMatrix() multiplies the current matrix with the one specified using
M, and replaces the current matrix with the product.
External documentation.
multiDrawArrays(Mode :: enum(),
First :: [integer()] | mem(),
Count :: [integer()] | mem()) ->
ok
gl:multiDrawArrays/3 specifies multiple sets of geometric primitives with very few
subroutine calls. Instead of calling a GL procedure to pass each individual vertex,
normal, texture coordinate, edge flag, or color, you can prespecify separate arrays
of vertices, normals, and colors and use them to construct a sequence of primitives
with a single call to gl:multiDrawArrays/3.
External documentation.
multiDrawArraysIndirect(Mode :: enum(),
Indirect :: offset() | mem(),
Drawcount :: i(),
Stride :: i()) ->
ok
gl:multiDrawArraysIndirect/4 specifies multiple geometric primitives with very few
subroutine calls. gl:multiDrawArraysIndirect/4 behaves similarly to a multitude of
calls to gl:drawArraysInstancedBaseInstance/5, execept that the parameters to each
call to gl:drawArraysInstancedBaseInstance/5 are stored in an array in memory at
the address given by Indirect, separated by the stride, in basic machine units,
specified by Stride. If Stride is zero, then the array is assumed to be tightly
packed in memory.
External documentation.
multiDrawArraysIndirectCount(Mode, Indirect, Drawcount,
Maxdrawcount, Stride) ->
ok
Types:
Mode = enum()
Indirect = offset() | mem()
Drawcount = Maxdrawcount = Stride = i()
No documentation available.
multiTexCoord1d(Target :: enum(), S :: f()) -> ok
multiTexCoord1dv(Target :: enum(), X2 :: {S :: f()}) -> ok
multiTexCoord1f(Target :: enum(), S :: f()) -> ok
multiTexCoord1fv(Target :: enum(), X2 :: {S :: f()}) -> ok
multiTexCoord1i(Target :: enum(), S :: i()) -> ok
multiTexCoord1iv(Target :: enum(), X2 :: {S :: i()}) -> ok
multiTexCoord1s(Target :: enum(), S :: i()) -> ok
multiTexCoord1sv(Target :: enum(), X2 :: {S :: i()}) -> ok
multiTexCoord2d(Target :: enum(), S :: f(), T :: f()) -> ok
multiTexCoord2dv(Target :: enum(), X2 :: {S :: f(), T :: f()}) ->
ok
multiTexCoord2f(Target :: enum(), S :: f(), T :: f()) -> ok
multiTexCoord2fv(Target :: enum(), X2 :: {S :: f(), T :: f()}) ->
ok
multiTexCoord2i(Target :: enum(), S :: i(), T :: i()) -> ok
multiTexCoord2iv(Target :: enum(), X2 :: {S :: i(), T :: i()}) ->
ok
multiTexCoord2s(Target :: enum(), S :: i(), T :: i()) -> ok
multiTexCoord2sv(Target :: enum(), X2 :: {S :: i(), T :: i()}) ->
ok
multiTexCoord3d(Target :: enum(), S :: f(), T :: f(), R :: f()) ->
ok
multiTexCoord3dv(Target :: enum(),
X2 :: {S :: f(), T :: f(), R :: f()}) ->
ok
multiTexCoord3f(Target :: enum(), S :: f(), T :: f(), R :: f()) ->
ok
multiTexCoord3fv(Target :: enum(),
X2 :: {S :: f(), T :: f(), R :: f()}) ->
ok
multiTexCoord3i(Target :: enum(), S :: i(), T :: i(), R :: i()) ->
ok
multiTexCoord3iv(Target :: enum(),
X2 :: {S :: i(), T :: i(), R :: i()}) ->
ok
multiTexCoord3s(Target :: enum(), S :: i(), T :: i(), R :: i()) ->
ok
multiTexCoord3sv(Target :: enum(),
X2 :: {S :: i(), T :: i(), R :: i()}) ->
ok
multiTexCoord4d(Target :: enum(),
S :: f(),
T :: f(),
R :: f(),
Q :: f()) ->
ok
multiTexCoord4dv(Target :: enum(),
X2 :: {S :: f(), T :: f(), R :: f(), Q :: f()}) ->
ok
multiTexCoord4f(Target :: enum(),
S :: f(),
T :: f(),
R :: f(),
Q :: f()) ->
ok
multiTexCoord4fv(Target :: enum(),
X2 :: {S :: f(), T :: f(), R :: f(), Q :: f()}) ->
ok
multiTexCoord4i(Target :: enum(),
S :: i(),
T :: i(),
R :: i(),
Q :: i()) ->
ok
multiTexCoord4iv(Target :: enum(),
X2 :: {S :: i(), T :: i(), R :: i(), Q :: i()}) ->
ok
multiTexCoord4s(Target :: enum(),
S :: i(),
T :: i(),
R :: i(),
Q :: i()) ->
ok
multiTexCoord4sv(Target :: enum(),
X2 :: {S :: i(), T :: i(), R :: i(), Q :: i()}) ->
ok
gl:multiTexCoord() specifies texture coordinates in one, two, three, or four
dimensions. gl:multiTexCoord1() sets the current texture coordinates to (s 0 0 1);
a call to gl:multiTexCoord2() sets them to (s t 0 1). Similarly,
gl:multiTexCoord3() specifies the texture coordinates as (s t r 1), and
gl:multiTexCoord4() defines all four components explicitly as (s t r q).
External documentation.
endList() -> ok
newList(List :: i(), Mode :: enum()) -> ok
Display lists are groups of GL commands that have been stored for subsequent
execution. Display lists are created with gl:newList/2. All subsequent commands are
placed in the display list, in the order issued, until gl:endList/0 is called.
External documentation.
normal3b(Nx :: i(), Ny :: i(), Nz :: i()) -> ok
normal3bv(X1 :: {Nx :: i(), Ny :: i(), Nz :: i()}) -> ok
normal3d(Nx :: f(), Ny :: f(), Nz :: f()) -> ok
normal3dv(X1 :: {Nx :: f(), Ny :: f(), Nz :: f()}) -> ok
normal3f(Nx :: f(), Ny :: f(), Nz :: f()) -> ok
normal3fv(X1 :: {Nx :: f(), Ny :: f(), Nz :: f()}) -> ok
normal3i(Nx :: i(), Ny :: i(), Nz :: i()) -> ok
normal3iv(X1 :: {Nx :: i(), Ny :: i(), Nz :: i()}) -> ok
normal3s(Nx :: i(), Ny :: i(), Nz :: i()) -> ok
normal3sv(X1 :: {Nx :: i(), Ny :: i(), Nz :: i()}) -> ok
The current normal is set to the given coordinates whenever gl:normal() is issued.
Byte, short, or integer arguments are converted to floating-point format with a
linear mapping that maps the most positive representable integer value to 1.0 and
the most negative representable integer value to -1.0.
External documentation.
normalPointer(Type :: enum(),
Stride :: i(),
Ptr :: offset() | mem()) ->
ok
gl:normalPointer/3 specifies the location and data format of an array of normals to
use when rendering. Type specifies the data type of each normal coordinate, and
Stride specifies the byte stride from one normal to the next, allowing vertices and
attributes to be packed into a single array or stored in separate arrays. (Single-
array storage may be more efficient on some implementations; see
gl:interleavedArrays/3.)
External documentation.
objectPtrLabel(Ptr :: offset() | mem(),
Length :: i(),
Label :: string()) ->
ok
gl:objectPtrLabel/3 labels the sync object identified by Ptr.
External documentation.
ortho(Left :: f(),
Right :: f(),
Bottom :: f(),
Top :: f(),
Near_val :: f(),
Far_val :: f()) ->
ok
gl:ortho/6 describes a transformation that produces a parallel projection. The
current matrix (see gl:matrixMode/1) is multiplied by this matrix and the result
replaces the current matrix, as if gl:multMatrix() were called with the following
matrix as its argument:
External documentation.
passThrough(Token :: f()) -> ok
External documentation.
patchParameterfv(Pname :: enum(), Values :: [f()]) -> ok
patchParameteri(Pname :: enum(), Value :: i()) -> ok
gl:patchParameter() specifies the parameters that will be used for patch
primitives. Pname specifies the parameter to modify and must be either
?GL_PATCH_VERTICES, ?GL_PATCH_DEFAULT_OUTER_LEVEL or ?GL_PATCH_DEFAULT_INNER_LEVEL.
For gl:patchParameteri/2, Value specifies the new value for the parameter specified
by Pname. For gl:patchParameterfv/2, Values specifies the address of an array
containing the new values for the parameter specified by Pname.
External documentation.
pauseTransformFeedback() -> ok
gl:pauseTransformFeedback/0 pauses transform feedback operations on the currently
active transform feedback object. When transform feedback operations are paused,
transform feedback is still considered active and changing most transform feedback
state related to the object results in an error. However, a new transform feedback
object may be bound while transform feedback is paused.
External documentation.
pixelMapfv(Map :: enum(), Mapsize :: i(), Values :: binary()) ->
ok
pixelMapuiv(Map :: enum(), Mapsize :: i(), Values :: binary()) ->
ok
pixelMapusv(Map :: enum(), Mapsize :: i(), Values :: binary()) ->
ok
gl:pixelMap() sets up translation tables, or maps, used by gl:copyPixels/5,
gl:copyTexImage1D/7, gl:copyTexImage2D/8, gl:copyTexSubImage1D/6,
gl:copyTexSubImage2D/8, gl:copyTexSubImage3D/9, gl:drawPixels/5, gl:readPixels/7,
gl:texImage1D/8, gl:texImage2D/9, gl:texImage3D/10, gl:texSubImage1D/7,
gl:texSubImage2D/9, and gl:texSubImage3D/11. Additionally, if the ARB_imaging
subset is supported, the routines gl:colorTable/6, gl:colorSubTable/6,
gl:convolutionFilter1D/6, gl:convolutionFilter2D/7, gl:histogram/4, gl:minmax/3,
and gl:separableFilter2D/8. Use of these maps is described completely in the
gl:pixelTransfer() reference page, and partly in the reference pages for the pixel
and texture image commands. Only the specification of the maps is described in this
reference page.
External documentation.
pixelStoref(Pname :: enum(), Param :: f()) -> ok
pixelStorei(Pname :: enum(), Param :: i()) -> ok
gl:pixelStore() sets pixel storage modes that affect the operation of subsequent
gl:readPixels/7 as well as the unpacking of texture patterns (see gl:texImage1D/8,
gl:texImage2D/9, gl:texImage3D/10, gl:texSubImage1D/7, gl:texSubImage2D/9,
gl:texSubImage3D/11), gl:compressedTexImage1D/7, gl:compressedTexImage2D/8,
gl:compressedTexImage3D/9, gl:compressedTexSubImage1D/7,
gl:compressedTexSubImage2D/9 or gl:compressedTexSubImage1D/7.
External documentation.
pixelTransferf(Pname :: enum(), Param :: f()) -> ok
pixelTransferi(Pname :: enum(), Param :: i()) -> ok
gl:pixelTransfer() sets pixel transfer modes that affect the operation of
subsequent gl:copyPixels/5, gl:copyTexImage1D/7, gl:copyTexImage2D/8,
gl:copyTexSubImage1D/6, gl:copyTexSubImage2D/8, gl:copyTexSubImage3D/9,
gl:drawPixels/5, gl:readPixels/7, gl:texImage1D/8, gl:texImage2D/9,
gl:texImage3D/10, gl:texSubImage1D/7, gl:texSubImage2D/9, and gl:texSubImage3D/11
commands. Additionally, if the ARB_imaging subset is supported, the routines
gl:colorTable/6, gl:colorSubTable/6, gl:convolutionFilter1D/6,
gl:convolutionFilter2D/7, gl:histogram/4, gl:minmax/3, and gl:separableFilter2D/8
are also affected. The algorithms that are specified by pixel transfer modes
operate on pixels after they are read from the frame buffer
(gl:copyPixels/5gl:copyTexImage1D/7, gl:copyTexImage2D/8, gl:copyTexSubImage1D/6,
gl:copyTexSubImage2D/8, gl:copyTexSubImage3D/9, and gl:readPixels/7), or unpacked
from client memory (gl:drawPixels/5, gl:texImage1D/8, gl:texImage2D/9,
gl:texImage3D/10, gl:texSubImage1D/7, gl:texSubImage2D/9, and gl:texSubImage3D/11).
Pixel transfer operations happen in the same order, and in the same manner,
regardless of the command that resulted in the pixel operation. Pixel storage modes
(see gl:pixelStore()) control the unpacking of pixels being read from client memory
and the packing of pixels being written back into client memory.
External documentation.
pixelZoom(Xfactor :: f(), Yfactor :: f()) -> ok
gl:pixelZoom/2 specifies values for the x and y zoom factors. During the execution
of gl:drawPixels/5 or gl:copyPixels/5, if ( xr, yr) is the current raster position,
and a given element is in the mth row and nth column of the pixel rectangle, then
pixels whose centers are in the rectangle with corners at
External documentation.
pointParameterf(Pname :: enum(), Param :: f()) -> ok
pointParameterfv(Pname :: enum(), Params :: tuple()) -> ok
pointParameteri(Pname :: enum(), Param :: i()) -> ok
pointParameteriv(Pname :: enum(), Params :: tuple()) -> ok
The following values are accepted for Pname:
External documentation.
pointSize(Size :: f()) -> ok
gl:pointSize/1 specifies the rasterized diameter of points. If point size mode is
disabled (see gl:enable/1 with parameter ?GL_PROGRAM_POINT_SIZE), this value will
be used to rasterize points. Otherwise, the value written to the shading language
built-in variable gl_PointSize will be used.
External documentation.
polygonMode(Face :: enum(), Mode :: enum()) -> ok
gl:polygonMode/2 controls the interpretation of polygons for rasterization. Face
describes which polygons Mode applies to: both front and back-facing polygons
(?GL_FRONT_AND_BACK). The polygon mode affects only the final rasterization of
polygons. In particular, a polygon's vertices are lit and the polygon is clipped
and possibly culled before these modes are applied.
External documentation.
polygonOffset(Factor :: f(), Units :: f()) -> ok
When ?GL_POLYGON_OFFSET_FILL, ?GL_POLYGON_OFFSET_LINE, or ?GL_POLYGON_OFFSET_POINT
is enabled, each fragment's depth value will be offset after it is interpolated
from the depth values of the appropriate vertices. The value of the offset is
factor×DZ+r×units, where DZ is a measurement of the change in depth relative to the
screen area of the polygon, and r is the smallest value that is guaranteed to
produce a resolvable offset for a given implementation. The offset is added before
the depth test is performed and before the value is written into the depth buffer.
External documentation.
polygonOffsetClamp(Factor :: f(), Units :: f(), Clamp :: f()) ->
ok
No documentation available.
polygonStipple(Mask :: binary()) -> ok
Polygon stippling, like line stippling (see gl:lineStipple/2), masks out certain
fragments produced by rasterization, creating a pattern. Stippling is independent
of polygon antialiasing.
External documentation.
primitiveRestartIndex(Index :: i()) -> ok
gl:primitiveRestartIndex/1 specifies a vertex array element that is treated
specially when primitive restarting is enabled. This is known as the primitive
restart index.
External documentation.
prioritizeTextures(Textures :: [i()], Priorities :: [clamp()]) ->
ok
gl:prioritizeTextures/2 assigns the N texture priorities given in Priorities to the
N textures named in Textures.
External documentation.
programBinary(Program :: i(),
BinaryFormat :: enum(),
Binary :: binary()) ->
ok
gl:programBinary/3 loads a program object with a program binary previously returned
from gl:getProgramBinary/2. BinaryFormat and Binary must be those returned by a
previous call to gl:getProgramBinary/2, and Length must be the length returned by
gl:getProgramBinary/2, or by gl:getProgram() when called with Pname set to
?GL_PROGRAM_BINARY_LENGTH. If these conditions are not met, loading the program
binary will fail and Program's ?GL_LINK_STATUS will be set to ?GL_FALSE.
External documentation.
programParameteri(Program :: i(), Pname :: enum(), Value :: i()) ->
ok
gl:programParameter() specifies a new value for the parameter nameed by Pname for
the program object Program.
External documentation.
programUniform1d(Program :: i(), Location :: i(), V0 :: f()) -> ok
programUniform1dv(Program :: i(), Location :: i(), Value :: [f()]) ->
ok
programUniform1f(Program :: i(), Location :: i(), V0 :: f()) -> ok
programUniform1fv(Program :: i(), Location :: i(), Value :: [f()]) ->
ok
programUniform1i(Program :: i(), Location :: i(), V0 :: i()) -> ok
programUniform1iv(Program :: i(), Location :: i(), Value :: [i()]) ->
ok
programUniform1ui(Program :: i(), Location :: i(), V0 :: i()) ->
ok
programUniform1uiv(Program :: i(),
Location :: i(),
Value :: [i()]) ->
ok
programUniform2d(Program :: i(),
Location :: i(),
V0 :: f(),
V1 :: f()) ->
ok
programUniform2dv(Program :: i(),
Location :: i(),
Value :: [{f(), f()}]) ->
ok
programUniform2f(Program :: i(),
Location :: i(),
V0 :: f(),
V1 :: f()) ->
ok
programUniform2fv(Program :: i(),
Location :: i(),
Value :: [{f(), f()}]) ->
ok
programUniform2i(Program :: i(),
Location :: i(),
V0 :: i(),
V1 :: i()) ->
ok
programUniform2iv(Program :: i(),
Location :: i(),
Value :: [{i(), i()}]) ->
ok
programUniform2ui(Program :: i(),
Location :: i(),
V0 :: i(),
V1 :: i()) ->
ok
programUniform2uiv(Program :: i(),
Location :: i(),
Value :: [{i(), i()}]) ->
ok
programUniform3d(Program :: i(),
Location :: i(),
V0 :: f(),
V1 :: f(),
V2 :: f()) ->
ok
programUniform3dv(Program :: i(),
Location :: i(),
Value :: [{f(), f(), f()}]) ->
ok
programUniform3f(Program :: i(),
Location :: i(),
V0 :: f(),
V1 :: f(),
V2 :: f()) ->
ok
programUniform3fv(Program :: i(),
Location :: i(),
Value :: [{f(), f(), f()}]) ->
ok
programUniform3i(Program :: i(),
Location :: i(),
V0 :: i(),
V1 :: i(),
V2 :: i()) ->
ok
programUniform3iv(Program :: i(),
Location :: i(),
Value :: [{i(), i(), i()}]) ->
ok
programUniform3ui(Program :: i(),
Location :: i(),
V0 :: i(),
V1 :: i(),
V2 :: i()) ->
ok
programUniform3uiv(Program :: i(),
Location :: i(),
Value :: [{i(), i(), i()}]) ->
ok
programUniform4d(Program :: i(),
Location :: i(),
V0 :: f(),
V1 :: f(),
V2 :: f(),
V3 :: f()) ->
ok
programUniform4dv(Program :: i(),
Location :: i(),
Value :: [{f(), f(), f(), f()}]) ->
ok
programUniform4f(Program :: i(),
Location :: i(),
V0 :: f(),
V1 :: f(),
V2 :: f(),
V3 :: f()) ->
ok
programUniform4fv(Program :: i(),
Location :: i(),
Value :: [{f(), f(), f(), f()}]) ->
ok
programUniform4i(Program :: i(),
Location :: i(),
V0 :: i(),
V1 :: i(),
V2 :: i(),
V3 :: i()) ->
ok
programUniform4iv(Program :: i(),
Location :: i(),
Value :: [{i(), i(), i(), i()}]) ->
ok
programUniform4ui(Program :: i(),
Location :: i(),
V0 :: i(),
V1 :: i(),
V2 :: i(),
V3 :: i()) ->
ok
programUniform4uiv(Program :: i(),
Location :: i(),
Value :: [{i(), i(), i(), i()}]) ->
ok
programUniformMatrix2dv(Program :: i(),
Location :: i(),
Transpose :: 0 | 1,
Value :: [{f(), f(), f(), f()}]) ->
ok
programUniformMatrix2fv(Program :: i(),
Location :: i(),
Transpose :: 0 | 1,
Value :: [{f(), f(), f(), f()}]) ->
ok
programUniformMatrix2x3dv(Program :: i(),
Location :: i(),
Transpose :: 0 | 1,
Value ::
[{f(), f(), f(), f(), f(), f()}]) ->
ok
programUniformMatrix2x3fv(Program :: i(),
Location :: i(),
Transpose :: 0 | 1,
Value ::
[{f(), f(), f(), f(), f(), f()}]) ->
ok
programUniformMatrix2x4dv(Program, Location, Transpose, Value) ->
ok
programUniformMatrix2x4fv(Program, Location, Transpose, Value) ->
ok
programUniformMatrix3dv(Program, Location, Transpose, Value) -> ok
programUniformMatrix3fv(Program, Location, Transpose, Value) -> ok
programUniformMatrix3x2dv(Program :: i(),
Location :: i(),
Transpose :: 0 | 1,
Value ::
[{f(), f(), f(), f(), f(), f()}]) ->
ok
programUniformMatrix3x2fv(Program :: i(),
Location :: i(),
Transpose :: 0 | 1,
Value ::
[{f(), f(), f(), f(), f(), f()}]) ->
ok
programUniformMatrix3x4dv(Program, Location, Transpose, Value) ->
ok
programUniformMatrix3x4fv(Program, Location, Transpose, Value) ->
ok
programUniformMatrix4dv(Program, Location, Transpose, Value) -> ok
programUniformMatrix4fv(Program, Location, Transpose, Value) -> ok
programUniformMatrix4x2dv(Program, Location, Transpose, Value) ->
ok
programUniformMatrix4x2fv(Program, Location, Transpose, Value) ->
ok
programUniformMatrix4x3dv(Program, Location, Transpose, Value) ->
ok
programUniformMatrix4x3fv(Program, Location, Transpose, Value) ->
ok
Types:
Program = Location = i()
Transpose = 0 | 1
Value =
[{f(), f(), f(), f(), f(), f(), f(), f(), f(), f(), f(), f()}]
gl:programUniform() modifies the value of a uniform variable or a uniform variable
array. The location of the uniform variable to be modified is specified by
Location, which should be a value returned by gl:getUniformLocation/2.
gl:programUniform() operates on the program object specified by Program.
External documentation.
provokingVertex(Mode :: enum()) -> ok
Flatshading a vertex shader varying output means to assign all vetices of the
primitive the same value for that output. The vertex from which these values is
derived is known as the provoking vertex and gl:provokingVertex/1 specifies which
vertex is to be used as the source of data for flat shaded varyings.
External documentation.
popAttrib() -> ok
pushAttrib(Mask :: i()) -> ok
gl:pushAttrib/1 takes one argument, a mask that indicates which groups of state
variables to save on the attribute stack. Symbolic constants are used to set bits
in the mask. Mask is typically constructed by specifying the bitwise-or of several
of these constants together. The special mask ?GL_ALL_ATTRIB_BITS can be used to
save all stackable states.
External documentation.
popClientAttrib() -> ok
pushClientAttrib(Mask :: i()) -> ok
gl:pushClientAttrib/1 takes one argument, a mask that indicates which groups of
client-state variables to save on the client attribute stack. Symbolic constants
are used to set bits in the mask. Mask is typically constructed by specifying the
bitwise-or of several of these constants together. The special mask
?GL_CLIENT_ALL_ATTRIB_BITS can be used to save all stackable client state.
External documentation.
popDebugGroup() -> ok
pushDebugGroup(Source :: enum(),
Id :: i(),
Length :: i(),
Message :: string()) ->
ok
gl:pushDebugGroup/4 pushes a debug group described by the string Message into the
command stream. The value of Id specifies the ID of messages generated. The
parameter Length contains the number of characters in Message. If Length is
negative, it is implied that Message contains a null terminated string. The message
has the specified Source and Id, the Type?GL_DEBUG_TYPE_PUSH_GROUP, and
Severity?GL_DEBUG_SEVERITY_NOTIFICATION. The GL will put a new debug group on top
of the debug group stack which inherits the control of the volume of debug output
of the debug group previously residing on the top of the debug group stack. Because
debug groups are strictly hierarchical, any additional control of the debug output
volume will only apply within the active debug group and the debug groups pushed on
top of the active debug group.
External documentation.
popMatrix() -> ok
pushMatrix() -> ok
There is a stack of matrices for each of the matrix modes. In ?GL_MODELVIEW mode,
the stack depth is at least 32. In the other modes, ?GL_COLOR, ?GL_PROJECTION, and
?GL_TEXTURE, the depth is at least 2. The current matrix in any mode is the matrix
on the top of the stack for that mode.
External documentation.
popName() -> ok
pushName(Name :: i()) -> ok
The name stack is used during selection mode to allow sets of rendering commands to
be uniquely identified. It consists of an ordered set of unsigned integers and is
initially empty.
External documentation.
queryCounter(Id :: i(), Target :: enum()) -> ok
gl:queryCounter/2 causes the GL to record the current time into the query object
named Id. Target must be ?GL_TIMESTAMP. The time is recorded after all previous
commands on the GL client and server state and the framebuffer have been fully
realized. When the time is recorded, the query result for that object is marked
available. gl:queryCounter/2 timer queries can be used within a gl:beginQuery/2 /
gl:endQuery/1 block where the target is ?GL_TIME_ELAPSED and it does not affect the
result of that query object.
External documentation.
rasterPos2d(X :: f(), Y :: f()) -> ok
rasterPos2dv(X1 :: {X :: f(), Y :: f()}) -> ok
rasterPos2f(X :: f(), Y :: f()) -> ok
rasterPos2fv(X1 :: {X :: f(), Y :: f()}) -> ok
rasterPos2i(X :: i(), Y :: i()) -> ok
rasterPos2iv(X1 :: {X :: i(), Y :: i()}) -> ok
rasterPos2s(X :: i(), Y :: i()) -> ok
rasterPos2sv(X1 :: {X :: i(), Y :: i()}) -> ok
rasterPos3d(X :: f(), Y :: f(), Z :: f()) -> ok
rasterPos3dv(X1 :: {X :: f(), Y :: f(), Z :: f()}) -> ok
rasterPos3f(X :: f(), Y :: f(), Z :: f()) -> ok
rasterPos3fv(X1 :: {X :: f(), Y :: f(), Z :: f()}) -> ok
rasterPos3i(X :: i(), Y :: i(), Z :: i()) -> ok
rasterPos3iv(X1 :: {X :: i(), Y :: i(), Z :: i()}) -> ok
rasterPos3s(X :: i(), Y :: i(), Z :: i()) -> ok
rasterPos3sv(X1 :: {X :: i(), Y :: i(), Z :: i()}) -> ok
rasterPos4d(X :: f(), Y :: f(), Z :: f(), W :: f()) -> ok
rasterPos4dv(X1 :: {X :: f(), Y :: f(), Z :: f(), W :: f()}) -> ok
rasterPos4f(X :: f(), Y :: f(), Z :: f(), W :: f()) -> ok
rasterPos4fv(X1 :: {X :: f(), Y :: f(), Z :: f(), W :: f()}) -> ok
rasterPos4i(X :: i(), Y :: i(), Z :: i(), W :: i()) -> ok
rasterPos4iv(X1 :: {X :: i(), Y :: i(), Z :: i(), W :: i()}) -> ok
rasterPos4s(X :: i(), Y :: i(), Z :: i(), W :: i()) -> ok
rasterPos4sv(X1 :: {X :: i(), Y :: i(), Z :: i(), W :: i()}) -> ok
The GL maintains a 3D position in window coordinates. This position, called the
raster position, is used to position pixel and bitmap write operations. It is
maintained with subpixel accuracy. See gl:bitmap/7, gl:drawPixels/5, and
gl:copyPixels/5.
External documentation.
readBuffer(Mode :: enum()) -> ok
gl:readBuffer/1 specifies a color buffer as the source for subsequent
gl:readPixels/7, gl:copyTexImage1D/7, gl:copyTexImage2D/8, gl:copyTexSubImage1D/6,
gl:copyTexSubImage2D/8, and gl:copyTexSubImage3D/9 commands. Mode accepts one of
twelve or more predefined values. In a fully configured system, ?GL_FRONT,
?GL_LEFT, and ?GL_FRONT_LEFT all name the front left buffer, ?GL_FRONT_RIGHT and
?GL_RIGHT name the front right buffer, and ?GL_BACK_LEFT and ?GL_BACK name the back
left buffer. Further more, the constants ?GL_COLOR_ATTACHMENTi may be used to
indicate the ith color attachment where i ranges from zero to the value of
?GL_MAX_COLOR_ATTACHMENTS minus one.
External documentation.
readPixels(X, Y, Width, Height, Format, Type, Pixels) -> ok
Types:
X = Y = Width = Height = i()
Format = Type = enum()
Pixels = mem()
gl:readPixels/7 and glReadnPixels return pixel data from the frame buffer, starting
with the pixel whose lower left corner is at location (X, Y), into client memory
starting at location Data. Several parameters control the processing of the pixel
data before it is placed into client memory. These parameters are set with
gl:pixelStore(). This reference page describes the effects on gl:readPixels/7 and
glReadnPixels of most, but not all of the parameters specified by these three
commands.
External documentation.
rectd(X1 :: f(), Y1 :: f(), X2 :: f(), Y2 :: f()) -> ok
rectdv(V1 :: {f(), f()}, V2 :: {f(), f()}) -> ok
rectf(X1 :: f(), Y1 :: f(), X2 :: f(), Y2 :: f()) -> ok
rectfv(V1 :: {f(), f()}, V2 :: {f(), f()}) -> ok
recti(X1 :: i(), Y1 :: i(), X2 :: i(), Y2 :: i()) -> ok
rectiv(V1 :: {i(), i()}, V2 :: {i(), i()}) -> ok
rects(X1 :: i(), Y1 :: i(), X2 :: i(), Y2 :: i()) -> ok
rectsv(V1 :: {i(), i()}, V2 :: {i(), i()}) -> ok
gl:rect() supports efficient specification of rectangles as two corner points. Each
rectangle command takes four arguments, organized either as two consecutive pairs
of (x y) coordinates or as two pointers to arrays, each containing an (x y) pair.
The resulting rectangle is defined in the z=0 plane.
External documentation.
releaseShaderCompiler() -> ok
gl:releaseShaderCompiler/0 provides a hint to the implementation that it may free
internal resources associated with its shader compiler. gl:compileShader/1 may
subsequently be called and the implementation may at that time reallocate resources
previously freed by the call to gl:releaseShaderCompiler/0.
External documentation.
renderMode(Mode :: enum()) -> i()
gl:renderMode/1 sets the rasterization mode. It takes one argument, Mode, which can
assume one of three predefined values:
External documentation.
renderbufferStorage(Target :: enum(),
Internalformat :: enum(),
Width :: i(),
Height :: i()) ->
ok
gl:renderbufferStorage/4 is equivalent to calling
gl:renderbufferStorageMultisample/5 with the Samples set to zero, and
glNamedRenderbufferStorage is equivalent to calling
glNamedRenderbufferStorageMultisample with the samples set to zero.
External documentation.
renderbufferStorageMultisample(Target :: enum(),
Samples :: i(),
Internalformat :: enum(),
Width :: i(),
Height :: i()) ->
ok
gl:renderbufferStorageMultisample/5 and glNamedRenderbufferStorageMultisample
establish the data storage, format, dimensions and number of samples of a
renderbuffer object's image.
External documentation.
resetHistogram(Target :: enum()) -> ok
gl:resetHistogram/1 resets all the elements of the current histogram table to zero.
External documentation.
resetMinmax(Target :: enum()) -> ok
gl:resetMinmax/1 resets the elements of the current minmax table to their initial
values: the ``maximum'' element receives the minimum possible component values, and
the ``minimum'' element receives the maximum possible component values.
External documentation.
resumeTransformFeedback() -> ok
gl:resumeTransformFeedback/0 resumes transform feedback operations on the currently
active transform feedback object. When transform feedback operations are paused,
transform feedback is still considered active and changing most transform feedback
state related to the object results in an error. However, a new transform feedback
object may be bound while transform feedback is paused.
External documentation.
rotated(Angle :: f(), X :: f(), Y :: f(), Z :: f()) -> ok
rotatef(Angle :: f(), X :: f(), Y :: f(), Z :: f()) -> ok
gl:rotate() produces a rotation of Angle degrees around the vector (x y z). The
current matrix (see gl:matrixMode/1) is multiplied by a rotation matrix with the
product replacing the current matrix, as if gl:multMatrix() were called with the
following matrix as its argument:
External documentation.
sampleCoverage(Value :: clamp(), Invert :: 0 | 1) -> ok
Multisampling samples a pixel multiple times at various implementation-dependent
subpixel locations to generate antialiasing effects. Multisampling transparently
antialiases points, lines, polygons, and images if it is enabled.
External documentation.
sampleMaski(MaskNumber :: i(), Mask :: i()) -> ok
gl:sampleMaski/2 sets one 32-bit sub-word of the multi-word sample mask,
?GL_SAMPLE_MASK_VALUE.
External documentation.
samplerParameterIiv(Sampler :: i(),
Pname :: enum(),
Param :: [i()]) ->
ok
samplerParameterIuiv(Sampler :: i(),
Pname :: enum(),
Param :: [i()]) ->
ok
samplerParameterf(Sampler :: i(), Pname :: enum(), Param :: f()) ->
ok
samplerParameterfv(Sampler :: i(),
Pname :: enum(),
Param :: [f()]) ->
ok
samplerParameteri(Sampler :: i(), Pname :: enum(), Param :: i()) ->
ok
samplerParameteriv(Sampler :: i(),
Pname :: enum(),
Param :: [i()]) ->
ok
gl:samplerParameter() assigns the value or values in Params to the sampler
parameter specified as Pname. Sampler specifies the sampler object to be modified,
and must be the name of a sampler object previously returned from a call to
gl:genSamplers/1. The following symbols are accepted in Pname:
External documentation.
scaled(X :: f(), Y :: f(), Z :: f()) -> ok
scalef(X :: f(), Y :: f(), Z :: f()) -> ok
gl:scale() produces a nonuniform scaling along the x, y, and z axes. The three
parameters indicate the desired scale factor along each of the three axes.
External documentation.
scissor(X :: i(), Y :: i(), Width :: i(), Height :: i()) -> ok
gl:scissor/4 defines a rectangle, called the scissor box, in window coordinates.
The first two arguments, X and Y, specify the lower left corner of the box. Width
and Height specify the width and height of the box.
External documentation.
scissorArrayv(First :: i(), V :: [{i(), i(), i(), i()}]) -> ok
gl:scissorArrayv/2 defines rectangles, called scissor boxes, in window coordinates
for each viewport. First specifies the index of the first scissor box to modify and
Count specifies the number of scissor boxes to modify. First must be less than the
value of ?GL_MAX_VIEWPORTS, and First + Count must be less than or equal to the
value of ?GL_MAX_VIEWPORTS. V specifies the address of an array containing integers
specifying the lower left corner of the scissor boxes, and the width and height of
the scissor boxes, in that order.
External documentation.
scissorIndexed(Index :: i(),
Left :: i(),
Bottom :: i(),
Width :: i(),
Height :: i()) ->
ok
scissorIndexedv(Index :: i(), V :: {i(), i(), i(), i()}) -> ok
gl:scissorIndexed/5 defines the scissor box for a specified viewport. Index
specifies the index of scissor box to modify. Index must be less than the value of
?GL_MAX_VIEWPORTS. For gl:scissorIndexed/5, Left, Bottom, Width and Height specify
the left, bottom, width and height of the scissor box, in pixels, respectively. For
gl:scissorIndexedv/2, V specifies the address of an array containing integers
specifying the lower left corner of the scissor box, and the width and height of
the scissor box, in that order.
External documentation.
secondaryColor3b(Red :: i(), Green :: i(), Blue :: i()) -> ok
secondaryColor3bv(X1 :: {Red :: i(), Green :: i(), Blue :: i()}) ->
ok
secondaryColor3d(Red :: f(), Green :: f(), Blue :: f()) -> ok
secondaryColor3dv(X1 :: {Red :: f(), Green :: f(), Blue :: f()}) ->
ok
secondaryColor3f(Red :: f(), Green :: f(), Blue :: f()) -> ok
secondaryColor3fv(X1 :: {Red :: f(), Green :: f(), Blue :: f()}) ->
ok
secondaryColor3i(Red :: i(), Green :: i(), Blue :: i()) -> ok
secondaryColor3iv(X1 :: {Red :: i(), Green :: i(), Blue :: i()}) ->
ok
secondaryColor3s(Red :: i(), Green :: i(), Blue :: i()) -> ok
secondaryColor3sv(X1 :: {Red :: i(), Green :: i(), Blue :: i()}) ->
ok
secondaryColor3ub(Red :: i(), Green :: i(), Blue :: i()) -> ok
secondaryColor3ubv(X1 :: {Red :: i(), Green :: i(), Blue :: i()}) ->
ok
secondaryColor3ui(Red :: i(), Green :: i(), Blue :: i()) -> ok
secondaryColor3uiv(X1 :: {Red :: i(), Green :: i(), Blue :: i()}) ->
ok
secondaryColor3us(Red :: i(), Green :: i(), Blue :: i()) -> ok
secondaryColor3usv(X1 :: {Red :: i(), Green :: i(), Blue :: i()}) ->
ok
The GL stores both a primary four-valued RGBA color and a secondary four-valued
RGBA color (where alpha is always set to 0.0) that is associated with every vertex.
External documentation.
secondaryColorPointer(Size :: i(),
Type :: enum(),
Stride :: i(),
Pointer :: offset() | mem()) ->
ok
gl:secondaryColorPointer/4 specifies the location and data format of an array of
color components to use when rendering. Size specifies the number of components per
color, and must be 3. Type specifies the data type of each color component, and
Stride specifies the byte stride from one color to the next, allowing vertices and
attributes to be packed into a single array or stored in separate arrays.
External documentation.
selectBuffer(Size :: i(), Buffer :: mem()) -> ok
gl:selectBuffer/2 has two arguments: Buffer is a pointer to an array of unsigned
integers, and Size indicates the size of the array. Buffer returns values from the
name stack (see gl:initNames/0, gl:loadName/1, gl:pushName/1) when the rendering
mode is ?GL_SELECT (see gl:renderMode/1). gl:selectBuffer/2 must be issued before
selection mode is enabled, and it must not be issued while the rendering mode is
?GL_SELECT.
External documentation.
separableFilter2D(Target, Internalformat, Width, Height, Format,
Type, Row, Column) ->
ok
Types:
Target = Internalformat = enum()
Width = Height = i()
Format = Type = enum()
Row = Column = offset() | mem()
gl:separableFilter2D/8 builds a two-dimensional separable convolution filter kernel
from two arrays of pixels.
External documentation.
shadeModel(Mode :: enum()) -> ok
GL primitives can have either flat or smooth shading. Smooth shading, the default,
causes the computed colors of vertices to be interpolated as the primitive is
rasterized, typically assigning different colors to each resulting pixel fragment.
Flat shading selects the computed color of just one vertex and assigns it to all
the pixel fragments generated by rasterizing a single primitive. In either case,
the computed color of a vertex is the result of lighting if lighting is enabled, or
it is the current color at the time the vertex was specified if lighting is
disabled.
External documentation.
shaderBinary(Shaders :: [i()],
Binaryformat :: enum(),
Binary :: binary()) ->
ok
gl:shaderBinary/3 loads pre-compiled shader binary code into the Count shader
objects whose handles are given in Shaders. Binary points to Length bytes of binary
shader code stored in client memory. BinaryFormat specifies the format of the pre-
compiled code.
External documentation.
shaderSource(Shader :: i(), String :: [unicode:chardata()]) -> ok
gl:shaderSource/2 sets the source code in Shader to the source code in the array of
strings specified by String. Any source code previously stored in the shader object
is completely replaced. The number of strings in the array is specified by Count.
If Length is ?NULL, each string is assumed to be null terminated. If Length is a
value other than ?NULL, it points to an array containing a string length for each
of the corresponding elements of String. Each element in the Length array may
contain the length of the corresponding string (the null character is not counted
as part of the string length) or a value less than 0 to indicate that the string is
null terminated. The source code strings are not scanned or parsed at this time;
they are simply copied into the specified shader object.
External documentation.
shaderStorageBlockBinding(Program :: i(),
StorageBlockIndex :: i(),
StorageBlockBinding :: i()) ->
ok
gl:shaderStorageBlockBinding/3, changes the active shader storage block with an
assigned index of StorageBlockIndex in program object Program. StorageBlockIndex
must be an active shader storage block index in Program. StorageBlockBinding must
be less than the value of ?GL_MAX_SHADER_STORAGE_BUFFER_BINDINGS. If successful,
gl:shaderStorageBlockBinding/3 specifies that Program will use the data store of
the buffer object bound to the binding point StorageBlockBinding to read and write
the values of the buffer variables in the shader storage block identified by
StorageBlockIndex.
External documentation.
stencilFunc(Func :: enum(), Ref :: i(), Mask :: i()) -> ok
Stenciling, like depth-buffering, enables and disables drawing on a per-pixel
basis. Stencil planes are first drawn into using GL drawing primitives, then
geometry and images are rendered using the stencil planes to mask out portions of
the screen. Stenciling is typically used in multipass rendering algorithms to
achieve special effects, such as decals, outlining, and constructive solid geometry
rendering.
External documentation.
stencilFuncSeparate(Face :: enum(),
Func :: enum(),
Ref :: i(),
Mask :: i()) ->
ok
Stenciling, like depth-buffering, enables and disables drawing on a per-pixel
basis. You draw into the stencil planes using GL drawing primitives, then render
geometry and images, using the stencil planes to mask out portions of the screen.
Stenciling is typically used in multipass rendering algorithms to achieve special
effects, such as decals, outlining, and constructive solid geometry rendering.
External documentation.
stencilMask(Mask :: i()) -> ok
gl:stencilMask/1 controls the writing of individual bits in the stencil planes. The
least significant n bits of Mask, where n is the number of bits in the stencil
buffer, specify a mask. Where a 1 appears in the mask, it's possible to write to
the corresponding bit in the stencil buffer. Where a 0 appears, the corresponding
bit is write-protected. Initially, all bits are enabled for writing.
External documentation.
stencilMaskSeparate(Face :: enum(), Mask :: i()) -> ok
gl:stencilMaskSeparate/2 controls the writing of individual bits in the stencil
planes. The least significant n bits of Mask, where n is the number of bits in the
stencil buffer, specify a mask. Where a 1 appears in the mask, it's possible to
write to the corresponding bit in the stencil buffer. Where a 0 appears, the
corresponding bit is write-protected. Initially, all bits are enabled for writing.
External documentation.
stencilOp(Fail :: enum(), Zfail :: enum(), Zpass :: enum()) -> ok
Stenciling, like depth-buffering, enables and disables drawing on a per-pixel
basis. You draw into the stencil planes using GL drawing primitives, then render
geometry and images, using the stencil planes to mask out portions of the screen.
Stenciling is typically used in multipass rendering algorithms to achieve special
effects, such as decals, outlining, and constructive solid geometry rendering.
External documentation.
stencilOpSeparate(Face :: enum(),
Sfail :: enum(),
Dpfail :: enum(),
Dppass :: enum()) ->
ok
Stenciling, like depth-buffering, enables and disables drawing on a per-pixel
basis. You draw into the stencil planes using GL drawing primitives, then render
geometry and images, using the stencil planes to mask out portions of the screen.
Stenciling is typically used in multipass rendering algorithms to achieve special
effects, such as decals, outlining, and constructive solid geometry rendering.
External documentation.
texBuffer(Target :: enum(),
Internalformat :: enum(),
Buffer :: i()) ->
ok
textureBuffer(Texture :: i(),
Internalformat :: enum(),
Buffer :: i()) ->
ok
gl:texBuffer/3 and gl:textureBuffer/3 attaches the data store of a specified buffer
object to a specified texture object, and specify the storage format for the
texture image found in the buffer object. The texture object must be a buffer
texture.
External documentation.
texBufferRange(Target :: enum(),
Internalformat :: enum(),
Buffer :: i(),
Offset :: i(),
Size :: i()) ->
ok
textureBufferRange(Texture :: i(),
Internalformat :: enum(),
Buffer :: i(),
Offset :: i(),
Size :: i()) ->
ok
gl:texBufferRange/5 and gl:textureBufferRange/5 attach a range of the data store of
a specified buffer object to a specified texture object, and specify the storage
format for the texture image found in the buffer object. The texture object must be
a buffer texture.
External documentation.
texCoord1d(S :: f()) -> ok
texCoord1dv(X1 :: {S :: f()}) -> ok
texCoord1f(S :: f()) -> ok
texCoord1fv(X1 :: {S :: f()}) -> ok
texCoord1i(S :: i()) -> ok
texCoord1iv(X1 :: {S :: i()}) -> ok
texCoord1s(S :: i()) -> ok
texCoord1sv(X1 :: {S :: i()}) -> ok
texCoord2d(S :: f(), T :: f()) -> ok
texCoord2dv(X1 :: {S :: f(), T :: f()}) -> ok
texCoord2f(S :: f(), T :: f()) -> ok
texCoord2fv(X1 :: {S :: f(), T :: f()}) -> ok
texCoord2i(S :: i(), T :: i()) -> ok
texCoord2iv(X1 :: {S :: i(), T :: i()}) -> ok
texCoord2s(S :: i(), T :: i()) -> ok
texCoord2sv(X1 :: {S :: i(), T :: i()}) -> ok
texCoord3d(S :: f(), T :: f(), R :: f()) -> ok
texCoord3dv(X1 :: {S :: f(), T :: f(), R :: f()}) -> ok
texCoord3f(S :: f(), T :: f(), R :: f()) -> ok
texCoord3fv(X1 :: {S :: f(), T :: f(), R :: f()}) -> ok
texCoord3i(S :: i(), T :: i(), R :: i()) -> ok
texCoord3iv(X1 :: {S :: i(), T :: i(), R :: i()}) -> ok
texCoord3s(S :: i(), T :: i(), R :: i()) -> ok
texCoord3sv(X1 :: {S :: i(), T :: i(), R :: i()}) -> ok
texCoord4d(S :: f(), T :: f(), R :: f(), Q :: f()) -> ok
texCoord4dv(X1 :: {S :: f(), T :: f(), R :: f(), Q :: f()}) -> ok
texCoord4f(S :: f(), T :: f(), R :: f(), Q :: f()) -> ok
texCoord4fv(X1 :: {S :: f(), T :: f(), R :: f(), Q :: f()}) -> ok
texCoord4i(S :: i(), T :: i(), R :: i(), Q :: i()) -> ok
texCoord4iv(X1 :: {S :: i(), T :: i(), R :: i(), Q :: i()}) -> ok
texCoord4s(S :: i(), T :: i(), R :: i(), Q :: i()) -> ok
texCoord4sv(X1 :: {S :: i(), T :: i(), R :: i(), Q :: i()}) -> ok
gl:texCoord() specifies texture coordinates in one, two, three, or four dimensions.
gl:texCoord1() sets the current texture coordinates to (s 0 0 1); a call to
gl:texCoord2() sets them to (s t 0 1). Similarly, gl:texCoord3() specifies the
texture coordinates as (s t r 1), and gl:texCoord4() defines all four components
explicitly as (s t r q).
External documentation.
texCoordPointer(Size :: i(),
Type :: enum(),
Stride :: i(),
Ptr :: offset() | mem()) ->
ok
gl:texCoordPointer/4 specifies the location and data format of an array of texture
coordinates to use when rendering. Size specifies the number of coordinates per
texture coordinate set, and must be 1, 2, 3, or 4. Type specifies the data type of
each texture coordinate, and Stride specifies the byte stride from one texture
coordinate set to the next, allowing vertices and attributes to be packed into a
single array or stored in separate arrays. (Single-array storage may be more
efficient on some implementations; see gl:interleavedArrays/3.)
External documentation.
texEnvf(Target :: enum(), Pname :: enum(), Param :: f()) -> ok
texEnvfv(Target :: enum(), Pname :: enum(), Params :: tuple()) ->
ok
texEnvi(Target :: enum(), Pname :: enum(), Param :: i()) -> ok
texEnviv(Target :: enum(), Pname :: enum(), Params :: tuple()) ->
ok
A texture environment specifies how texture values are interpreted when a fragment
is textured. When Target is ?GL_TEXTURE_FILTER_CONTROL, Pname must be
?GL_TEXTURE_LOD_BIAS. When Target is ?GL_TEXTURE_ENV, Pname can be
?GL_TEXTURE_ENV_MODE, ?GL_TEXTURE_ENV_COLOR, ?GL_COMBINE_RGB, ?GL_COMBINE_ALPHA,
?GL_RGB_SCALE, ?GL_ALPHA_SCALE, ?GL_SRC0_RGB, ?GL_SRC1_RGB, ?GL_SRC2_RGB,
?GL_SRC0_ALPHA, ?GL_SRC1_ALPHA, or ?GL_SRC2_ALPHA.
External documentation.
texGend(Coord :: enum(), Pname :: enum(), Param :: f()) -> ok
texGendv(Coord :: enum(), Pname :: enum(), Params :: tuple()) ->
ok
texGenf(Coord :: enum(), Pname :: enum(), Param :: f()) -> ok
texGenfv(Coord :: enum(), Pname :: enum(), Params :: tuple()) ->
ok
texGeni(Coord :: enum(), Pname :: enum(), Param :: i()) -> ok
texGeniv(Coord :: enum(), Pname :: enum(), Params :: tuple()) ->
ok
gl:texGen() selects a texture-coordinate generation function or supplies
coefficients for one of the functions. Coord names one of the (s, t, r, q) texture
coordinates; it must be one of the symbols ?GL_S, ?GL_T, ?GL_R, or ?GL_Q. Pname
must be one of three symbolic constants: ?GL_TEXTURE_GEN_MODE, ?GL_OBJECT_PLANE, or
?GL_EYE_PLANE. If Pname is ?GL_TEXTURE_GEN_MODE, then Params chooses a mode, one of
?GL_OBJECT_LINEAR, ?GL_EYE_LINEAR, ?GL_SPHERE_MAP, ?GL_NORMAL_MAP, or
?GL_REFLECTION_MAP. If Pname is either ?GL_OBJECT_PLANE or ?GL_EYE_PLANE, Params
contains coefficients for the corresponding texture generation function.
External documentation.
texImage1D(Target, Level, InternalFormat, Width, Border, Format,
Type, Pixels) ->
ok
Types:
Target = enum()
Level = InternalFormat = Width = Border = i()
Format = Type = enum()
Pixels = offset() | mem()
Texturing maps a portion of a specified texture image onto each graphical primitive
for which texturing is enabled. To enable and disable one-dimensional texturing,
call gl:enable/1 and gl:disable/1 with argument ?GL_TEXTURE_1D.
External documentation.
texImage2D(Target, Level, InternalFormat, Width, Height, Border,
Format, Type, Pixels) ->
ok
Types:
Target = enum()
Level = InternalFormat = Width = Height = Border = i()
Format = Type = enum()
Pixels = offset() | mem()
Texturing allows elements of an image array to be read by shaders.
External documentation.
texImage2DMultisample(Target, Samples, Internalformat, Width,
Height, Fixedsamplelocations) ->
ok
Types:
Target = enum()
Samples = i()
Internalformat = enum()
Width = Height = i()
Fixedsamplelocations = 0 | 1
gl:texImage2DMultisample/6 establishes the data storage, format, dimensions and
number of samples of a multisample texture's image.
External documentation.
texImage3D(Target, Level, InternalFormat, Width, Height, Depth,
Border, Format, Type, Pixels) ->
ok
Types:
Target = enum()
Level = InternalFormat = Width = Height = Depth = Border = i()
Format = Type = enum()
Pixels = offset() | mem()
Texturing maps a portion of a specified texture image onto each graphical primitive
for which texturing is enabled. To enable and disable three-dimensional texturing,
call gl:enable/1 and gl:disable/1 with argument ?GL_TEXTURE_3D.
External documentation.
texImage3DMultisample(Target, Samples, Internalformat, Width,
Height, Depth, Fixedsamplelocations) ->
ok
Types:
Target = enum()
Samples = i()
Internalformat = enum()
Width = Height = Depth = i()
Fixedsamplelocations = 0 | 1
gl:texImage3DMultisample/7 establishes the data storage, format, dimensions and
number of samples of a multisample texture's image.
External documentation.
texParameterIiv(Target :: enum(),
Pname :: enum(),
Params :: tuple()) ->
ok
texParameterIuiv(Target :: enum(),
Pname :: enum(),
Params :: tuple()) ->
ok
texParameterf(Target :: enum(), Pname :: enum(), Param :: f()) ->
ok
texParameterfv(Target :: enum(),
Pname :: enum(),
Params :: tuple()) ->
ok
texParameteri(Target :: enum(), Pname :: enum(), Param :: i()) ->
ok
texParameteriv(Target :: enum(),
Pname :: enum(),
Params :: tuple()) ->
ok
gl:texParameter() and gl:textureParameter() assign the value or values in Params to
the texture parameter specified as Pname. For gl:texParameter(), Target defines the
target texture, either ?GL_TEXTURE_1D, ?GL_TEXTURE_1D_ARRAY, ?GL_TEXTURE_2D,
?GL_TEXTURE_2D_ARRAY, ?GL_TEXTURE_2D_MULTISAMPLE, ?GL_TEXTURE_2D_MULTISAMPLE_ARRAY,
?GL_TEXTURE_3D, ?GL_TEXTURE_CUBE_MAP, ?GL_TEXTURE_CUBE_MAP_ARRAY, or
?GL_TEXTURE_RECTANGLE. The following symbols are accepted in Pname:
External documentation.
texStorage1D(Target :: enum(),
Levels :: i(),
Internalformat :: enum(),
Width :: i()) ->
ok
gl:texStorage1D/4 and gl:textureStorage1D() specify the storage requirements for
all levels of a one-dimensional texture simultaneously. Once a texture is specified
with this command, the format and dimensions of all levels become immutable unless
it is a proxy texture. The contents of the image may still be modified, however,
its storage requirements may not change. Such a texture is referred to as an
immutable-format texture.
External documentation.
texStorage2D(Target :: enum(),
Levels :: i(),
Internalformat :: enum(),
Width :: i(),
Height :: i()) ->
ok
gl:texStorage2D/5 and gl:textureStorage2D() specify the storage requirements for
all levels of a two-dimensional texture or one-dimensional texture array
simultaneously. Once a texture is specified with this command, the format and
dimensions of all levels become immutable unless it is a proxy texture. The
contents of the image may still be modified, however, its storage requirements may
not change. Such a texture is referred to as an immutable-format texture.
External documentation.
texStorage2DMultisample(Target, Samples, Internalformat, Width,
Height, Fixedsamplelocations) ->
ok
Types:
Target = enum()
Samples = i()
Internalformat = enum()
Width = Height = i()
Fixedsamplelocations = 0 | 1
gl:texStorage2DMultisample/6 and gl:textureStorage2DMultisample() specify the
storage requirements for a two-dimensional multisample texture. Once a texture is
specified with this command, its format and dimensions become immutable unless it
is a proxy texture. The contents of the image may still be modified, however, its
storage requirements may not change. Such a texture is referred to as an immutable-
format texture.
External documentation.
texStorage3D(Target, Levels, Internalformat, Width, Height, Depth) ->
ok
Types:
Target = enum()
Levels = i()
Internalformat = enum()
Width = Height = Depth = i()
gl:texStorage3D/6 and gl:textureStorage3D() specify the storage requirements for
all levels of a three-dimensional, two-dimensional array or cube-map array texture
simultaneously. Once a texture is specified with this command, the format and
dimensions of all levels become immutable unless it is a proxy texture. The
contents of the image may still be modified, however, its storage requirements may
not change. Such a texture is referred to as an immutable-format texture.
External documentation.
texStorage3DMultisample(Target, Samples, Internalformat, Width,
Height, Depth, Fixedsamplelocations) ->
ok
Types:
Target = enum()
Samples = i()
Internalformat = enum()
Width = Height = Depth = i()
Fixedsamplelocations = 0 | 1
gl:texStorage3DMultisample/7 and gl:textureStorage3DMultisample() specify the
storage requirements for a two-dimensional multisample array texture. Once a
texture is specified with this command, its format and dimensions become immutable
unless it is a proxy texture. The contents of the image may still be modified,
however, its storage requirements may not change. Such a texture is referred to as
an immutable-format texture.
External documentation.
texSubImage1D(Target, Level, Xoffset, Width, Format, Type, Pixels) ->
ok
Types:
Target = enum()
Level = Xoffset = Width = i()
Format = Type = enum()
Pixels = offset() | mem()
Texturing maps a portion of a specified texture image onto each graphical primitive
for which texturing is enabled. To enable or disable one-dimensional texturing,
call gl:enable/1 and gl:disable/1 with argument ?GL_TEXTURE_1D.
External documentation.
texSubImage2D(Target, Level, Xoffset, Yoffset, Width, Height,
Format, Type, Pixels) ->
ok
Types:
Target = enum()
Level = Xoffset = Yoffset = Width = Height = i()
Format = Type = enum()
Pixels = offset() | mem()
Texturing maps a portion of a specified texture image onto each graphical primitive
for which texturing is enabled.
External documentation.
texSubImage3D(Target, Level, Xoffset, Yoffset, Zoffset, Width,
Height, Depth, Format, Type, Pixels) ->
ok
Types:
Target = enum()
Level = Xoffset = Yoffset = Zoffset = Width = Height = Depth = i()
Format = Type = enum()
Pixels = offset() | mem()
Texturing maps a portion of a specified texture image onto each graphical primitive
for which texturing is enabled.
External documentation.
textureBarrier() -> ok
The values of rendered fragments are undefined when a shader stage fetches texels
and the same texels are written via fragment shader outputs, even if the reads and
writes are not in the same drawing command. To safely read the result of a written
texel via a texel fetch in a subsequent drawing command, call gl:textureBarrier/0
between the two drawing commands to guarantee that writes have completed and caches
have been invalidated before subsequent drawing commands are executed.
External documentation.
textureView(Texture, Target, Origtexture, Internalformat,
Minlevel, Numlevels, Minlayer, Numlayers) ->
ok
Types:
Texture = i()
Target = enum()
Origtexture = i()
Internalformat = enum()
Minlevel = Numlevels = Minlayer = Numlayers = i()
gl:textureView/8 initializes a texture object as an alias, or view of another
texture object, sharing some or all of the parent texture's data store with the
initialized texture. Texture specifies a name previously reserved by a successful
call to gl:genTextures/1 but that has not yet been bound or given a target. Target
specifies the target for the newly initialized texture and must be compatible with
the target of the parent texture, given in Origtexture as specified in the
following table:
External documentation.
transformFeedbackBufferBase(Xfb :: i(),
Index :: i(),
Buffer :: i()) ->
ok
gl:transformFeedbackBufferBase/3 binds the buffer object Buffer to the binding
point at index Index of the transform feedback object Xfb.
External documentation.
transformFeedbackBufferRange(Xfb :: i(),
Index :: i(),
Buffer :: i(),
Offset :: i(),
Size :: i()) ->
ok
gl:transformFeedbackBufferRange/5 binds a range of the buffer object Buffer
represented by Offset and Size to the binding point at index Index of the transform
feedback object Xfb.
External documentation.
transformFeedbackVaryings(Program :: i(),
Varyings :: [unicode:chardata()],
BufferMode :: enum()) ->
ok
The names of the vertex or geometry shader outputs to be recorded in transform
feedback mode are specified using gl:transformFeedbackVaryings/3. When a geometry
shader is active, transform feedback records the values of selected geometry shader
output variables from the emitted vertices. Otherwise, the values of the selected
vertex shader outputs are recorded.
External documentation.
translated(X :: f(), Y :: f(), Z :: f()) -> ok
translatef(X :: f(), Y :: f(), Z :: f()) -> ok
gl:translate() produces a translation by (x y z). The current matrix (see
gl:matrixMode/1) is multiplied by this translation matrix, with the product
replacing the current matrix, as if gl:multMatrix() were called with the following
matrix for its argument:
External documentation.
uniform1d(Location :: i(), X :: f()) -> ok
uniform1dv(Location :: i(), Value :: [f()]) -> ok
uniform1f(Location :: i(), V0 :: f()) -> ok
uniform1fv(Location :: i(), Value :: [f()]) -> ok
uniform1i(Location :: i(), V0 :: i()) -> ok
uniform1iv(Location :: i(), Value :: [i()]) -> ok
uniform1ui(Location :: i(), V0 :: i()) -> ok
uniform1uiv(Location :: i(), Value :: [i()]) -> ok
uniform2d(Location :: i(), X :: f(), Y :: f()) -> ok
uniform2dv(Location :: i(), Value :: [{f(), f()}]) -> ok
uniform2f(Location :: i(), V0 :: f(), V1 :: f()) -> ok
uniform2fv(Location :: i(), Value :: [{f(), f()}]) -> ok
uniform2i(Location :: i(), V0 :: i(), V1 :: i()) -> ok
uniform2iv(Location :: i(), Value :: [{i(), i()}]) -> ok
uniform2ui(Location :: i(), V0 :: i(), V1 :: i()) -> ok
uniform2uiv(Location :: i(), Value :: [{i(), i()}]) -> ok
uniform3d(Location :: i(), X :: f(), Y :: f(), Z :: f()) -> ok
uniform3dv(Location :: i(), Value :: [{f(), f(), f()}]) -> ok
uniform3f(Location :: i(), V0 :: f(), V1 :: f(), V2 :: f()) -> ok
uniform3fv(Location :: i(), Value :: [{f(), f(), f()}]) -> ok
uniform3i(Location :: i(), V0 :: i(), V1 :: i(), V2 :: i()) -> ok
uniform3iv(Location :: i(), Value :: [{i(), i(), i()}]) -> ok
uniform3ui(Location :: i(), V0 :: i(), V1 :: i(), V2 :: i()) -> ok
uniform3uiv(Location :: i(), Value :: [{i(), i(), i()}]) -> ok
uniform4d(Location :: i(), X :: f(), Y :: f(), Z :: f(), W :: f()) ->
ok
uniform4dv(Location :: i(), Value :: [{f(), f(), f(), f()}]) -> ok
uniform4f(Location :: i(),
V0 :: f(),
V1 :: f(),
V2 :: f(),
V3 :: f()) ->
ok
uniform4fv(Location :: i(), Value :: [{f(), f(), f(), f()}]) -> ok
uniform4i(Location :: i(),
V0 :: i(),
V1 :: i(),
V2 :: i(),
V3 :: i()) ->
ok
uniform4iv(Location :: i(), Value :: [{i(), i(), i(), i()}]) -> ok
uniform4ui(Location :: i(),
V0 :: i(),
V1 :: i(),
V2 :: i(),
V3 :: i()) ->
ok
uniform4uiv(Location :: i(), Value :: [{i(), i(), i(), i()}]) ->
ok
uniformMatrix2dv(Location :: i(),
Transpose :: 0 | 1,
Value :: [{f(), f(), f(), f()}]) ->
ok
uniformMatrix2fv(Location :: i(),
Transpose :: 0 | 1,
Value :: [{f(), f(), f(), f()}]) ->
ok
uniformMatrix2x3dv(Location :: i(),
Transpose :: 0 | 1,
Value :: [{f(), f(), f(), f(), f(), f()}]) ->
ok
uniformMatrix2x3fv(Location :: i(),
Transpose :: 0 | 1,
Value :: [{f(), f(), f(), f(), f(), f()}]) ->
ok
uniformMatrix2x4dv(Location :: i(),
Transpose :: 0 | 1,
Value ::
[{f(), f(), f(), f(), f(), f(), f(), f()}]) ->
ok
uniformMatrix2x4fv(Location :: i(),
Transpose :: 0 | 1,
Value ::
[{f(), f(), f(), f(), f(), f(), f(), f()}]) ->
ok
uniformMatrix3dv(Location :: i(),
Transpose :: 0 | 1,
Value ::
[{f(),
f(),
f(),
f(),
f(),
f(),
f(),
f(),
f()}]) ->
ok
uniformMatrix3fv(Location :: i(),
Transpose :: 0 | 1,
Value ::
[{f(),
f(),
f(),
f(),
f(),
f(),
f(),
f(),
f()}]) ->
ok
uniformMatrix3x2dv(Location :: i(),
Transpose :: 0 | 1,
Value :: [{f(), f(), f(), f(), f(), f()}]) ->
ok
uniformMatrix3x2fv(Location :: i(),
Transpose :: 0 | 1,
Value :: [{f(), f(), f(), f(), f(), f()}]) ->
ok
uniformMatrix3x4dv(Location, Transpose, Value) -> ok
uniformMatrix3x4fv(Location, Transpose, Value) -> ok
uniformMatrix4dv(Location, Transpose, Value) -> ok
uniformMatrix4fv(Location, Transpose, Value) -> ok
uniformMatrix4x2dv(Location :: i(),
Transpose :: 0 | 1,
Value ::
[{f(), f(), f(), f(), f(), f(), f(), f()}]) ->
ok
uniformMatrix4x2fv(Location :: i(),
Transpose :: 0 | 1,
Value ::
[{f(), f(), f(), f(), f(), f(), f(), f()}]) ->
ok
uniformMatrix4x3dv(Location, Transpose, Value) -> ok
uniformMatrix4x3fv(Location, Transpose, Value) -> ok
Types:
Location = i()
Transpose = 0 | 1
Value =
[{f(), f(), f(), f(), f(), f(), f(), f(), f(), f(), f(), f()}]
gl:uniform() modifies the value of a uniform variable or a uniform variable array.
The location of the uniform variable to be modified is specified by Location, which
should be a value returned by gl:getUniformLocation/2. gl:uniform() operates on the
program object that was made part of current state by calling gl:useProgram/1.
External documentation.
uniformBlockBinding(Program :: i(),
UniformBlockIndex :: i(),
UniformBlockBinding :: i()) ->
ok
Binding points for active uniform blocks are assigned using
gl:uniformBlockBinding/3. Each of a program's active uniform blocks has a
corresponding uniform buffer binding point. Program is the name of a program object
for which the command gl:linkProgram/1 has been issued in the past.
External documentation.
uniformSubroutinesuiv(Shadertype :: enum(), Indices :: [i()]) ->
ok
gl:uniformSubroutines() loads all active subroutine uniforms for shader stage
Shadertype of the current program with subroutine indices from Indices, storing
Indices[i] into the uniform at location I. Count must be equal to the value of
?GL_ACTIVE_SUBROUTINE_UNIFORM_LOCATIONS for the program currently in use at shader
stage Shadertype. Furthermore, all values in Indices must be less than the value of
?GL_ACTIVE_SUBROUTINES for the shader stage.
External documentation.
useProgram(Program :: i()) -> ok
gl:useProgram/1 installs the program object specified by Program as part of current
rendering state. One or more executables are created in a program object by
successfully attaching shader objects to it with gl:attachShader/2, successfully
compiling the shader objects with gl:compileShader/1, and successfully linking the
program object with gl:linkProgram/1.
External documentation.
useProgramStages(Pipeline :: i(), Stages :: i(), Program :: i()) ->
ok
gl:useProgramStages/3 binds executables from a program object associated with a
specified set of shader stages to the program pipeline object given by Pipeline.
Pipeline specifies the program pipeline object to which to bind the executables.
Stages contains a logical combination of bits indicating the shader stages to use
within Program with the program pipeline object Pipeline. Stages must be a logical
combination of ?GL_VERTEX_SHADER_BIT, ?GL_TESS_CONTROL_SHADER_BIT,
?GL_TESS_EVALUATION_SHADER_BIT, ?GL_GEOMETRY_SHADER_BIT, ?GL_FRAGMENT_SHADER_BIT
and ?GL_COMPUTE_SHADER_BIT. Additionally, the special value ?GL_ALL_SHADER_BITS may
be specified to indicate that all executables contained in Program should be
installed in Pipeline.
External documentation.
validateProgram(Program :: i()) -> ok
gl:validateProgram/1 checks to see whether the executables contained in Program can
execute given the current OpenGL state. The information generated by the validation
process will be stored in Program's information log. The validation information may
consist of an empty string, or it may be a string containing information about how
the current program object interacts with the rest of current OpenGL state. This
provides a way for OpenGL implementers to convey more information about why the
current program is inefficient, suboptimal, failing to execute, and so on.
External documentation.
validateProgramPipeline(Pipeline :: i()) -> ok
gl:validateProgramPipeline/1 instructs the implementation to validate the shader
executables contained in Pipeline against the current GL state. The implementation
may use this as an opportunity to perform any internal shader modifications that
may be required to ensure correct operation of the installed shaders given the
current GL state.
External documentation.
vertex2d(X :: f(), Y :: f()) -> ok
vertex2dv(X1 :: {X :: f(), Y :: f()}) -> ok
vertex2f(X :: f(), Y :: f()) -> ok
vertex2fv(X1 :: {X :: f(), Y :: f()}) -> ok
vertex2i(X :: i(), Y :: i()) -> ok
vertex2iv(X1 :: {X :: i(), Y :: i()}) -> ok
vertex2s(X :: i(), Y :: i()) -> ok
vertex2sv(X1 :: {X :: i(), Y :: i()}) -> ok
vertex3d(X :: f(), Y :: f(), Z :: f()) -> ok
vertex3dv(X1 :: {X :: f(), Y :: f(), Z :: f()}) -> ok
vertex3f(X :: f(), Y :: f(), Z :: f()) -> ok
vertex3fv(X1 :: {X :: f(), Y :: f(), Z :: f()}) -> ok
vertex3i(X :: i(), Y :: i(), Z :: i()) -> ok
vertex3iv(X1 :: {X :: i(), Y :: i(), Z :: i()}) -> ok
vertex3s(X :: i(), Y :: i(), Z :: i()) -> ok
vertex3sv(X1 :: {X :: i(), Y :: i(), Z :: i()}) -> ok
vertex4d(X :: f(), Y :: f(), Z :: f(), W :: f()) -> ok
vertex4dv(X1 :: {X :: f(), Y :: f(), Z :: f(), W :: f()}) -> ok
vertex4f(X :: f(), Y :: f(), Z :: f(), W :: f()) -> ok
vertex4fv(X1 :: {X :: f(), Y :: f(), Z :: f(), W :: f()}) -> ok
vertex4i(X :: i(), Y :: i(), Z :: i(), W :: i()) -> ok
vertex4iv(X1 :: {X :: i(), Y :: i(), Z :: i(), W :: i()}) -> ok
vertex4s(X :: i(), Y :: i(), Z :: i(), W :: i()) -> ok
vertex4sv(X1 :: {X :: i(), Y :: i(), Z :: i(), W :: i()}) -> ok
gl:vertex() commands are used within gl:'begin'/1/gl:'end'/0 pairs to specify
point, line, and polygon vertices. The current color, normal, texture coordinates,
and fog coordinate are associated with the vertex when gl:vertex() is called.
External documentation.
vertexArrayElementBuffer(Vaobj :: i(), Buffer :: i()) -> ok
gl:vertexArrayElementBuffer/2 binds a buffer object with id Buffer to the element
array buffer bind point of a vertex array object with id Vaobj. If Buffer is zero,
any existing element array buffer binding to Vaobj is removed.
External documentation.
vertexAttrib1d(Index :: i(), X :: f()) -> ok
vertexAttrib1dv(Index :: i(), X2 :: {X :: f()}) -> ok
vertexAttrib1f(Index :: i(), X :: f()) -> ok
vertexAttrib1fv(Index :: i(), X2 :: {X :: f()}) -> ok
vertexAttrib1s(Index :: i(), X :: i()) -> ok
vertexAttrib1sv(Index :: i(), X2 :: {X :: i()}) -> ok
vertexAttrib2d(Index :: i(), X :: f(), Y :: f()) -> ok
vertexAttrib2dv(Index :: i(), X2 :: {X :: f(), Y :: f()}) -> ok
vertexAttrib2f(Index :: i(), X :: f(), Y :: f()) -> ok
vertexAttrib2fv(Index :: i(), X2 :: {X :: f(), Y :: f()}) -> ok
vertexAttrib2s(Index :: i(), X :: i(), Y :: i()) -> ok
vertexAttrib2sv(Index :: i(), X2 :: {X :: i(), Y :: i()}) -> ok
vertexAttrib3d(Index :: i(), X :: f(), Y :: f(), Z :: f()) -> ok
vertexAttrib3dv(Index :: i(),
X2 :: {X :: f(), Y :: f(), Z :: f()}) ->
ok
vertexAttrib3f(Index :: i(), X :: f(), Y :: f(), Z :: f()) -> ok
vertexAttrib3fv(Index :: i(),
X2 :: {X :: f(), Y :: f(), Z :: f()}) ->
ok
vertexAttrib3s(Index :: i(), X :: i(), Y :: i(), Z :: i()) -> ok
vertexAttrib3sv(Index :: i(),
X2 :: {X :: i(), Y :: i(), Z :: i()}) ->
ok
vertexAttrib4Nbv(Index :: i(), V :: {i(), i(), i(), i()}) -> ok
vertexAttrib4Niv(Index :: i(), V :: {i(), i(), i(), i()}) -> ok
vertexAttrib4Nsv(Index :: i(), V :: {i(), i(), i(), i()}) -> ok
vertexAttrib4Nub(Index :: i(),
X :: i(),
Y :: i(),
Z :: i(),
W :: i()) ->
ok
vertexAttrib4Nubv(Index :: i(),
X2 :: {X :: i(), Y :: i(), Z :: i(), W :: i()}) ->
ok
vertexAttrib4Nuiv(Index :: i(), V :: {i(), i(), i(), i()}) -> ok
vertexAttrib4Nusv(Index :: i(), V :: {i(), i(), i(), i()}) -> ok
vertexAttrib4bv(Index :: i(), V :: {i(), i(), i(), i()}) -> ok
vertexAttrib4d(Index :: i(),
X :: f(),
Y :: f(),
Z :: f(),
W :: f()) ->
ok
vertexAttrib4dv(Index :: i(),
X2 :: {X :: f(), Y :: f(), Z :: f(), W :: f()}) ->
ok
vertexAttrib4f(Index :: i(),
X :: f(),
Y :: f(),
Z :: f(),
W :: f()) ->
ok
vertexAttrib4fv(Index :: i(),
X2 :: {X :: f(), Y :: f(), Z :: f(), W :: f()}) ->
ok
vertexAttrib4iv(Index :: i(), V :: {i(), i(), i(), i()}) -> ok
vertexAttrib4s(Index :: i(),
X :: i(),
Y :: i(),
Z :: i(),
W :: i()) ->
ok
vertexAttrib4sv(Index :: i(),
X2 :: {X :: i(), Y :: i(), Z :: i(), W :: i()}) ->
ok
vertexAttrib4ubv(Index :: i(), V :: {i(), i(), i(), i()}) -> ok
vertexAttrib4uiv(Index :: i(), V :: {i(), i(), i(), i()}) -> ok
vertexAttrib4usv(Index :: i(), V :: {i(), i(), i(), i()}) -> ok
vertexAttribI1i(Index :: i(), X :: i()) -> ok
vertexAttribI1iv(Index :: i(), X2 :: {X :: i()}) -> ok
vertexAttribI1ui(Index :: i(), X :: i()) -> ok
vertexAttribI1uiv(Index :: i(), X2 :: {X :: i()}) -> ok
vertexAttribI2i(Index :: i(), X :: i(), Y :: i()) -> ok
vertexAttribI2iv(Index :: i(), X2 :: {X :: i(), Y :: i()}) -> ok
vertexAttribI2ui(Index :: i(), X :: i(), Y :: i()) -> ok
vertexAttribI2uiv(Index :: i(), X2 :: {X :: i(), Y :: i()}) -> ok
vertexAttribI3i(Index :: i(), X :: i(), Y :: i(), Z :: i()) -> ok
vertexAttribI3iv(Index :: i(),
X2 :: {X :: i(), Y :: i(), Z :: i()}) ->
ok
vertexAttribI3ui(Index :: i(), X :: i(), Y :: i(), Z :: i()) -> ok
vertexAttribI3uiv(Index :: i(),
X2 :: {X :: i(), Y :: i(), Z :: i()}) ->
ok
vertexAttribI4bv(Index :: i(), V :: {i(), i(), i(), i()}) -> ok
vertexAttribI4i(Index :: i(),
X :: i(),
Y :: i(),
Z :: i(),
W :: i()) ->
ok
vertexAttribI4iv(Index :: i(),
X2 :: {X :: i(), Y :: i(), Z :: i(), W :: i()}) ->
ok
vertexAttribI4sv(Index :: i(), V :: {i(), i(), i(), i()}) -> ok
vertexAttribI4ubv(Index :: i(), V :: {i(), i(), i(), i()}) -> ok
vertexAttribI4ui(Index :: i(),
X :: i(),
Y :: i(),
Z :: i(),
W :: i()) ->
ok
vertexAttribI4uiv(Index :: i(),
X2 :: {X :: i(), Y :: i(), Z :: i(), W :: i()}) ->
ok
vertexAttribI4usv(Index :: i(), V :: {i(), i(), i(), i()}) -> ok
vertexAttribL1d(Index :: i(), X :: f()) -> ok
vertexAttribL1dv(Index :: i(), X2 :: {X :: f()}) -> ok
vertexAttribL2d(Index :: i(), X :: f(), Y :: f()) -> ok
vertexAttribL2dv(Index :: i(), X2 :: {X :: f(), Y :: f()}) -> ok
vertexAttribL3d(Index :: i(), X :: f(), Y :: f(), Z :: f()) -> ok
vertexAttribL3dv(Index :: i(),
X2 :: {X :: f(), Y :: f(), Z :: f()}) ->
ok
vertexAttribL4d(Index :: i(),
X :: f(),
Y :: f(),
Z :: f(),
W :: f()) ->
ok
vertexAttribL4dv(Index :: i(),
X2 :: {X :: f(), Y :: f(), Z :: f(), W :: f()}) ->
ok
The gl:vertexAttrib() family of entry points allows an application to pass generic
vertex attributes in numbered locations.
External documentation.
vertexArrayAttribBinding(Vaobj :: i(),
Attribindex :: i(),
Bindingindex :: i()) ->
ok
vertexAttribBinding(Attribindex :: i(), Bindingindex :: i()) -> ok
gl:vertexAttribBinding/2 and gl:vertexArrayAttribBinding/3 establishes an
association between the generic vertex attribute of a vertex array object whose
index is given by Attribindex, and a vertex buffer binding whose index is given by
Bindingindex. For gl:vertexAttribBinding/2, the vertex array object affected is
that currently bound. For gl:vertexArrayAttribBinding/3, Vaobj is the name of the
vertex array object.
External documentation.
vertexAttribDivisor(Index :: i(), Divisor :: i()) -> ok
gl:vertexAttribDivisor/2 modifies the rate at which generic vertex attributes
advance when rendering multiple instances of primitives in a single draw call. If
Divisor is zero, the attribute at slot Index advances once per vertex. If Divisor
is non-zero, the attribute advances once per Divisor instances of the set(s) of
vertices being rendered. An attribute is referred to as instanced if its
?GL_VERTEX_ATTRIB_ARRAY_DIVISOR value is non-zero.
External documentation.
vertexArrayAttribFormat(Vaobj, Attribindex, Size, Type,
Normalized, Relativeoffset) ->
ok
vertexArrayAttribIFormat(Vaobj :: i(),
Attribindex :: i(),
Size :: i(),
Type :: enum(),
Relativeoffset :: i()) ->
ok
vertexArrayAttribLFormat(Vaobj :: i(),
Attribindex :: i(),
Size :: i(),
Type :: enum(),
Relativeoffset :: i()) ->
ok
vertexAttribFormat(Attribindex :: i(),
Size :: i(),
Type :: enum(),
Normalized :: 0 | 1,
Relativeoffset :: i()) ->
ok
vertexAttribIFormat(Attribindex :: i(),
Size :: i(),
Type :: enum(),
Relativeoffset :: i()) ->
ok
vertexAttribIPointer(Index :: i(),
Size :: i(),
Type :: enum(),
Stride :: i(),
Pointer :: offset() | mem()) ->
ok
vertexAttribLFormat(Attribindex :: i(),
Size :: i(),
Type :: enum(),
Relativeoffset :: i()) ->
ok
vertexAttribLPointer(Index :: i(),
Size :: i(),
Type :: enum(),
Stride :: i(),
Pointer :: offset() | mem()) ->
ok
gl:vertexAttribFormat/5, gl:vertexAttribIFormat/4 and gl:vertexAttribLFormat/4, as
well as gl:vertexArrayAttribFormat/6, gl:vertexArrayAttribIFormat/5 and
gl:vertexArrayAttribLFormat/5 specify the organization of data in vertex arrays.
The first three calls operate on the bound vertex array object, whereas the last
three ones modify the state of a vertex array object with ID Vaobj. Attribindex
specifies the index of the generic vertex attribute array whose data layout is
being described, and must be less than the value of ?GL_MAX_VERTEX_ATTRIBS.
External documentation.
vertexAttribPointer(Index, Size, Type, Normalized, Stride,
Pointer) ->
ok
Types:
Index = Size = i()
Type = enum()
Normalized = 0 | 1
Stride = i()
Pointer = offset() | mem()
gl:vertexAttribPointer/6, gl:vertexAttribIPointer/5 and gl:vertexAttribLPointer/5
specify the location and data format of the array of generic vertex attributes at
index Index to use when rendering. Size specifies the number of components per
attribute and must be 1, 2, 3, 4, or ?GL_BGRA. Type specifies the data type of each
component, and Stride specifies the byte stride from one attribute to the next,
allowing vertices and attributes to be packed into a single array or stored in
separate arrays.
External documentation.
vertexArrayBindingDivisor(Vaobj :: i(),
Bindingindex :: i(),
Divisor :: i()) ->
ok
vertexBindingDivisor(Bindingindex :: i(), Divisor :: i()) -> ok
gl:vertexBindingDivisor/2 and gl:vertexArrayBindingDivisor/3 modify the rate at
which generic vertex attributes advance when rendering multiple instances of
primitives in a single draw command. If Divisor is zero, the attributes using the
buffer bound to Bindingindex advance once per vertex. If Divisor is non-zero, the
attributes advance once per Divisor instances of the set(s) of vertices being
rendered. An attribute is referred to as instanced if the corresponding Divisor
value is non-zero.
External documentation.
vertexPointer(Size :: i(),
Type :: enum(),
Stride :: i(),
Ptr :: offset() | mem()) ->
ok
gl:vertexPointer/4 specifies the location and data format of an array of vertex
coordinates to use when rendering. Size specifies the number of coordinates per
vertex, and must be 2, 3, or 4. Type specifies the data type of each coordinate,
and Stride specifies the byte stride from one vertex to the next, allowing vertices
and attributes to be packed into a single array or stored in separate arrays.
(Single-array storage may be more efficient on some implementations; see
gl:interleavedArrays/3.)
External documentation.
viewport(X :: i(), Y :: i(), Width :: i(), Height :: i()) -> ok
gl:viewport/4 specifies the affine transformation of x and y from normalized device
coordinates to window coordinates. Let (x nd y nd) be normalized device
coordinates. Then the window coordinates (x w y w) are computed as follows:
External documentation.
viewportArrayv(First :: i(), V :: [{f(), f(), f(), f()}]) -> ok
gl:viewportArrayv/2 specifies the parameters for multiple viewports
simulataneously. First specifies the index of the first viewport to modify and
Count specifies the number of viewports to modify. First must be less than the
value of ?GL_MAX_VIEWPORTS, and First + Count must be less than or equal to the
value of ?GL_MAX_VIEWPORTS. Viewports whose indices lie outside the range [First,
First + Count) are not modified. V contains the address of an array of floating
point values specifying the left ( x), bottom ( y), width ( w), and height ( h) of
each viewport, in that order. x and y give the location of the viewport's lower
left corner, and w and h give the width and height of the viewport, respectively.
The viewport specifies the affine transformation of x and y from normalized device
coordinates to window coordinates. Let (x nd y nd) be normalized device
coordinates. Then the window coordinates (x w y w) are computed as follows:
External documentation.
viewportIndexedf(Index :: i(),
X :: f(),
Y :: f(),
W :: f(),
H :: f()) ->
ok
viewportIndexedfv(Index :: i(), V :: {f(), f(), f(), f()}) -> ok
gl:viewportIndexedf/5 and gl:viewportIndexedfv/2 specify the parameters for a
single viewport. Index specifies the index of the viewport to modify. Index must be
less than the value of ?GL_MAX_VIEWPORTS. For gl:viewportIndexedf/5, X, Y, W, and H
specify the left, bottom, width and height of the viewport in pixels, respectively.
For gl:viewportIndexedfv/2, V contains the address of an array of floating point
values specifying the left ( x), bottom ( y), width ( w), and height ( h) of each
viewport, in that order. x and y give the location of the viewport's lower left
corner, and w and h give the width and height of the viewport, respectively. The
viewport specifies the affine transformation of x and y from normalized device
coordinates to window coordinates. Let (x nd y nd) be normalized device
coordinates. Then the window coordinates (x w y w) are computed as follows:
External documentation.
waitSync(Sync :: i(), Flags :: i(), Timeout :: i()) -> ok
gl:waitSync/3 causes the GL server to block and wait until Sync becomes signaled.
Sync is the name of an existing sync object upon which to wait. Flags and Timeout
are currently not used and must be set to zero and the special value
?GL_TIMEOUT_IGNORED, respectively
Flags and Timeout are placeholders for anticipated future extensions of sync object
capabilities. They must have these reserved values in order that existing code
calling gl:waitSync/3 operate properly in the presence of such extensions.
External documentation.
windowPos2d(X :: f(), Y :: f()) -> ok
windowPos2dv(X1 :: {X :: f(), Y :: f()}) -> ok
windowPos2f(X :: f(), Y :: f()) -> ok
windowPos2fv(X1 :: {X :: f(), Y :: f()}) -> ok
windowPos2i(X :: i(), Y :: i()) -> ok
windowPos2iv(X1 :: {X :: i(), Y :: i()}) -> ok
windowPos2s(X :: i(), Y :: i()) -> ok
windowPos2sv(X1 :: {X :: i(), Y :: i()}) -> ok
windowPos3d(X :: f(), Y :: f(), Z :: f()) -> ok
windowPos3dv(X1 :: {X :: f(), Y :: f(), Z :: f()}) -> ok
windowPos3f(X :: f(), Y :: f(), Z :: f()) -> ok
windowPos3fv(X1 :: {X :: f(), Y :: f(), Z :: f()}) -> ok
windowPos3i(X :: i(), Y :: i(), Z :: i()) -> ok
windowPos3iv(X1 :: {X :: i(), Y :: i(), Z :: i()}) -> ok
windowPos3s(X :: i(), Y :: i(), Z :: i()) -> ok
windowPos3sv(X1 :: {X :: i(), Y :: i(), Z :: i()}) -> ok
The GL maintains a 3D position in window coordinates. This position, called the
raster position, is used to position pixel and bitmap write operations. It is
maintained with subpixel accuracy. See gl:bitmap/7, gl:drawPixels/5, and
gl:copyPixels/5.
External documentation.