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GLGETUNIFORMINDICES(3G) OpenGL Manual GLGETUNIFORMINDICES(3G)
glGetUniformIndices - retrieve the index of a named uniform block
void glGetUniformIndices(GLuint program, GLsizei uniformCount,
const GLchar **uniformNames, GLuint *uniformIndices);
Specifies the name of a program containing uniforms whose indices to query.
Specifies the number of uniforms whose indices to query.
Specifies the address of an array of pointers to buffers containing the names of the
Specifies the address of an array that will receive the indices of the uniforms.
glGetUniformIndices retrieves the indices of a number of uniforms within program.
program must be the name of a program object for which the command glLinkProgram() must
have been called in the past, although it is not required that glLinkProgram() must have
succeeded. The link could have failed because the number of active uniforms exceeded the
uniformCount indicates both the number of elements in the array of names uniformNames and
the number of indices that may be written to uniformIndices.
uniformNames contains a list of uniformCount name strings identifying the uniform names to
be queried for indices. For each name string in uniformNames, the index assigned to the
active uniform of that name will be written to the corresponding element of
uniformIndices. If a string in uniformNames is not the name of an active uniform, the
special value GL_INVALID_INDEX will be written to the corresponding element of
If an error occurs, nothing is written to uniformIndices.
GL_INVALID_OPERATION is generated if program is not the name of a program object for which
glLinkProgram() has been called in the past.
glGetUniformIndices is available only if the GL version is 3.1 or greater.
glGetActiveUniform(), glGetActiveUniformName(), glLinkProgram()
Copyright (C) 2010 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.
opengl.org 06/10/2014 GLGETUNIFORMINDICES(3G)
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