bionic (3) glVertexAttribPointer.3G.gz
NAME
glVertexAttribPointer - define an array of generic vertex attribute data
C SPECIFICATION
void glVertexAttribPointer(GLuint index, GLint size, GLenum type, GLboolean normalized, GLsizei stride,
const GLvoid * pointer);
void glVertexAttribIPointer(GLuint index, GLint size, GLenum type, GLsizei stride,
const GLvoid * pointer);
void glVertexAttribLPointer(GLuint index, GLint size, GLenum type, GLsizei stride,
const GLvoid * pointer);
PARAMETERS
index
Specifies the index of the generic vertex attribute to be modified.
size
Specifies the number of components per generic vertex attribute. Must be 1, 2, 3, 4. Additionally,
the symbolic constant GL_BGRA is accepted by glVertexAttribPointer. The initial value is 4.
type
Specifies the data type of each component in the array. The symbolic constants GL_BYTE,
GL_UNSIGNED_BYTE, GL_SHORT, GL_UNSIGNED_SHORT, GL_INT, and GL_UNSIGNED_INT are accepted by
glVertexAttribPointer and glVertexAttribIPointer. Additionally GL_HALF_FLOAT, GL_FLOAT, GL_DOUBLE,
GL_FIXED, GL_INT_2_10_10_10_REV, GL_UNSIGNED_INT_2_10_10_10_REV and GL_UNSIGNED_INT_10F_11F_11F_REV
are accepted by glVertexAttribPointer. GL_DOUBLE is also accepted by glVertexAttribLPointer and is
the only token accepted by the type parameter for that function. The initial value is GL_FLOAT.
normalized
For glVertexAttribPointer, specifies whether fixed-point data values should be normalized (GL_TRUE)
or converted directly as fixed-point values (GL_FALSE) when they are accessed.
stride
Specifies the byte offset between consecutive generic vertex attributes. If stride is 0, the generic
vertex attributes are understood to be tightly packed in the array. The initial value is 0.
pointer
Specifies a offset of the first component of the first generic vertex attribute in the array in the
data store of the buffer currently bound to the GL_ARRAY_BUFFER target. The initial value is 0.
DESCRIPTION
glVertexAttribPointer, glVertexAttribIPointer and glVertexAttribLPointer 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.
For glVertexAttribPointer, if normalized is set to GL_TRUE, it indicates that values stored in an integer
format are to be mapped to the range [-1,1] (for signed values) or [0,1] (for unsigned values) when they
are accessed and converted to floating point. Otherwise, values will be converted to floats directly
without normalization.
For glVertexAttribIPointer, only the integer types GL_BYTE, GL_UNSIGNED_BYTE, GL_SHORT,
GL_UNSIGNED_SHORT, GL_INT, GL_UNSIGNED_INT are accepted. Values are always left as integer values.
glVertexAttribLPointer specifies state for a generic vertex attribute array associated with a shader
attribute variable declared with 64-bit double precision components. type must be GL_DOUBLE. index,
size, and stride behave as described for glVertexAttribPointer and glVertexAttribIPointer.
If pointer is not NULL, a non-zero named buffer object must be bound to the GL_ARRAY_BUFFER target (see
glBindBuffer()), otherwise an error is generated. pointer is treated as a byte offset into the buffer
object's data store. The buffer object binding (GL_ARRAY_BUFFER_BINDING) is saved as generic vertex
attribute array state (GL_VERTEX_ATTRIB_ARRAY_BUFFER_BINDING) for index index.
When a generic vertex attribute array is specified, size, type, normalized, stride, and pointer are saved
as vertex array state, in addition to the current vertex array buffer object binding.
To enable and disable a generic vertex attribute array, call glEnableVertexAttribArray() and
glDisableVertexAttribArray with index. If enabled, the generic vertex attribute array is used when
glDrawArrays(), glMultiDrawArrays(), glDrawElements(), glMultiDrawElements(), or glDrawRangeElements() is
called.
NOTES
Each generic vertex attribute array is initially disabled and isn't accessed when glDrawElements(),
glDrawRangeElements(), glDrawArrays(), glMultiDrawArrays(), or glMultiDrawElements() is called.
GL_UNSIGNED_INT_10F_11F_11F_REV is accepted for type only if the GL version is 4.4 or higher.
ERRORS
GL_INVALID_VALUE is generated if index is greater than or equal to GL_MAX_VERTEX_ATTRIBS.
GL_INVALID_VALUE is generated if size is not 1, 2, 3, 4 or (for glVertexAttribPointer), GL_BGRA.
GL_INVALID_ENUM is generated if type is not an accepted value.
GL_INVALID_VALUE is generated if stride is negative.
GL_INVALID_OPERATION is generated if size is GL_BGRA and type is not GL_UNSIGNED_BYTE,
GL_INT_2_10_10_10_REV or GL_UNSIGNED_INT_2_10_10_10_REV.
GL_INVALID_OPERATION is generated if type is GL_INT_2_10_10_10_REV or GL_UNSIGNED_INT_2_10_10_10_REV and
size is not 4 or GL_BGRA.
GL_INVALID_OPERATION is generated if type is GL_UNSIGNED_INT_10F_11F_11F_REV and size is not 3.
GL_INVALID_OPERATION is generated by glVertexAttribPointer if size is GL_BGRA and noramlized is GL_FALSE.
GL_INVALID_OPERATION is generated if zero is bound to the GL_ARRAY_BUFFER buffer object binding point and
the pointer argument is not NULL.
ASSOCIATED GETS
glGet() with argument GL_MAX_VERTEX_ATTRIBS
glGetVertexAttrib() with arguments index and GL_VERTEX_ATTRIB_ARRAY_ENABLED
glGetVertexAttrib() with arguments index and GL_VERTEX_ATTRIB_ARRAY_SIZE
glGetVertexAttrib() with arguments index and GL_VERTEX_ATTRIB_ARRAY_TYPE
glGetVertexAttrib() with arguments index and GL_VERTEX_ATTRIB_ARRAY_NORMALIZED
glGetVertexAttrib() with arguments index and GL_VERTEX_ATTRIB_ARRAY_STRIDE
glGetVertexAttrib() with arguments index and GL_VERTEX_ATTRIB_ARRAY_BUFFER_BINDING
glGet() with argument GL_ARRAY_BUFFER_BINDING
glGetVertexAttribPointerv() with arguments index and GL_VERTEX_ATTRIB_ARRAY_POINTER
VERSION SUPPORT
┌───────────────────────┬───────────────────────────────────────────────────────────────────────┐
│ │ OpenGL Version │
├───────────────────────┼─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┤
│Function │ 2.0 │ 2.1 │ 3.0 │ 3.1 │ 3.2 │ 3.3 │ 4.0 │ 4.1 │ 4.2 │ 4.3 │ 4.4 │ 4.5 │
│/ │ │ │ │ │ │ │ │ │ │ │ │ │
│Feature │ │ │ │ │ │ │ │ │ │ │ │ │
│Name │ │ │ │ │ │ │ │ │ │ │ │ │
├───────────────────────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┤
│glVertexAttribIPointer │ - │ - │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │
├───────────────────────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┤
│glVertexAttribLPointer │ - │ - │ - │ - │ - │ - │ - │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │
├───────────────────────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┤
│glVertexAttribPointer │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │
└───────────────────────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┘
SEE ALSO
glBindAttribLocation(), glBindBuffer(),
glDisableVertexAttribArray, glDrawArrays(), glDrawElements(), glDrawRangeElements(),
glEnableVertexAttribArray(), glMultiDrawArrays(), glMultiDrawElements(), glVertexAttrib()
COPYRIGHT
Copyright © 2003-2005 3Dlabs Inc. Ltd. Copyright © 2010-2014 Khronos Group. This material may be
distributed subject to the terms and conditions set forth in the Open Publication License, v 1.0, 8 June
1999. http://opencontent.org/openpub/.
COPYRIGHT
Copyright © 2003-2005 3Dlabs Inc. Ltd.
Copyright © 2010-2014 Khronos Group
[FIXME: source] 01/03/2018 GLVERTEXATTRIBPOINTE(3G)