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NAME
glGetVertexArrayIndexed - retrieve parameters of an attribute of a vertex array object
C SPECIFICATION
void glGetVertexArrayIndexed64iv(GLuint vaobj, GLuint index, GLenum pname,
GLint64 *param);
void glGetVertexArrayIndexediv(GLuint vaobj, GLuint index, GLenum pname, GLint *param);
PARAMETERS
vaobj
Specifies the name of a vertex array object.
index
Specifies the index of the vertex array object attribute. Must be a number between 0
and (GL_MAX_VERTEX_ATTRIBS - 1).
pname
Specifies the property to be used for the query. For glGetVertexArrayIndexediv, it
must be one of the following values: GL_VERTEX_ATTRIB_ARRAY_ENABLED,
GL_VERTEX_ATTRIB_ARRAY_SIZE, GL_VERTEX_ATTRIB_ARRAY_STRIDE,
GL_VERTEX_ATTRIB_ARRAY_TYPE, GL_VERTEX_ATTRIB_ARRAY_NORMALIZED,
GL_VERTEX_ATTRIB_ARRAY_INTEGER, GL_VERTEX_ATTRIB_ARRAY_LONG,
GL_VERTEX_ATTRIB_ARRAY_DIVISOR, or GL_VERTEX_ATTRIB_RELATIVE_OFFSET. For
glGetVertexArrayIndexed64v, it must be equal to GL_VERTEX_BINDING_OFFSET.
param
Returns the requested value.
DESCRIPTION
glGetVertexArrayIndexediv and glGetVertexArrayIndexed64iv provide a way of querying
parameters of an attribute at an user-specified index of a vertex array object. The vertex
array object does not have to be bound to the rendering context at the time of the call,
but must have been bound at least once prior to this call.
The following parameter values can be retrieved with glGetVertexArrayIndexediv for each of
the attributes defined for a vertex array object:
· GL_VERTEX_ATTRIB_ARRAY_ENABLED: param returns a value that is non-zero (true) if the
vertex attribute array for index is enabled and 0 (false) if it is disabled. The
initial value is GL_FALSE.
· GL_VERTEX_ATTRIB_ARRAY_SIZE: param returns a single value, the size of the vertex
attribute array for index. The size is the number of values for each element of the
vertex attribute array, and it will be 1, 2, 3 or 4. The initial value is 4.
· GL_VERTEX_ATTRIB_ARRAY_STRIDE: param returns a single value, the array stride for
(number of bytes between successive elements in) the vertex attribute array for index.
A value of 0 indicates the array elements are stored sequentially in memory. The
initial value is 0.
· GL_VERTEX_ATTRIB_ARRAY_TYPE: param returns a single value, a symbolic constant
indicating the array type for the vertex attribute array for index. Possible values
are GL_BYTE, GL_DOUBLE, GL_FIXED, GL_FLOAT, GL_HALF_FLOAT, GL_INT,
GL_INT_2_10_10_10_REV, GL_SHORT, GL_UNSIGNED_BYTE, GL_UNSIGNED_SHORT, GL_UNSIGNED_INT,
GL_UNSIGNED_INT_2_10_10_10_REV, and GL_UNSIGNED_INT_10F_11F_11F_REV . The initial
value is GL_FLOAT.
· GL_VERTEX_ATTRIB_ARRAY_NORMALIZED: param returns a single value that is non-zero
(true) if fixed-point data types for the vertex attribute array indicated by index are
normalized when they are converted to floating-point, and 0 (false) otherwise. The
initial value is GL_FALSE.
· GL_VERTEX_ATTRIB_ARRAY_INTEGER: param returns a single value that is non-zero (true)
if fixed-point data types for the vertex attribute array indicated by index have
integer data type, and 0 (false) otherwise. The initial value is 0 (GL_FALSE).
· GL_VERTEX_ATTRIB_ARRAY_LONG: param returns a single value that is non-zero (true) if a
vertex attribute is stored as an unconverted double, and 0 (false) otherwise. The
initial value is 0 (GL_FALSE).
· GL_VERTEX_ATTRIB_ARRAY_DIVISOR: param returns a single value that is the frequency
divisor used for instanced rendering. See glVertexAttribDivisor. The initial value is
0.
· GL_VERTEX_ATTRIB_RELATIVE_OFFSET: param returns a single value that is the byte offset
of the first element relative to the start of the vertex buffer binding specified
attribute fetches from. The initial value is 0.
glGetVertexArrayIndexed64iv can be used to retrieve GL_VERTEX_BINDING_OFFSET parameter
value for any of the attributes defined for a vertex array object. When pname is set to
GL_VERTEX_BINDING_OFFSET, param returns a single value that is the byte offset of the
first element in the bound buffer's data store. The initial value for this parameter is 0.
ERRORS
GL_INVALID_OPERATION error is generated if vaobj is not the name of an existing vertex
array object.
GL_INVALID_VALUE error is generated if index is greater than or equal to the value of
GL_MAX_VERTEX_ATTRIBS.
GL_INVALID_ENUM error is generated if pname is not one of the valid values. For more
details, please see above.
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 │ │ │ │ │ │ │ │ │ │ │ │ │
├────────────────────────────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┤
│glGetVertexArrayIndexed64iv │ - │ - │ - │ - │ - │ - │ - │ - │ - │ - │ - │ ✔ │
├────────────────────────────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┤
│glGetVertexArrayIndexediv │ - │ - │ - │ - │ - │ - │ - │ - │ - │ - │ - │ ✔ │
└────────────────────────────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┘
SEE ALSO
glGetVertexAttrib(), glVertexAttribBinding(), glVertexAttribIPointer(),
glVertexAttribLPointer(), glVertexAttribPointer()
COPYRIGHT
Copyright © 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 © 2014 Khronos Group
[FIXME: source] 07/22/2015 GLGETVERTEXARRAYINDE(3G)