glGetVertexArrayIndexed(3G)
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)
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