glGetUniformIndices — retrieve the index of a named uniform block
| ||GLuint program,|
|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 queried uniforms.
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 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 limit.
uniformCount indicates both the number of elements in the array of names
uniformNames and the number of indices that may be written to
uniformNames contains a list of
uniformCount nul-terminated 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
GL_INVALID_OPERATION is generated if
program is not the name of a program object for which glLinkProgram has been called in the past.
|OpenGL ES API Version|
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