glGetActiveUniformBlockName — retrieve the name of an active uniform block
| ||GLuint program,|
|GLchar *uniformBlockName |
Specifies the name of a program containing the uniform block.
Specifies the index of the uniform block within
Specifies the size of the buffer addressed by
Specifies the address of a variable to receive the number of characters that were written to
Specifies the address an array of characters to receive the name of the uniform block at
glGetActiveUniformBlockName retrieves the name of the active uniform block at
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.
uniformBlockIndex is an active uniform block index of
program, and must be less than the value of
Upon success, the name of the uniform block identified by
unifomBlockIndex is returned into
uniformBlockName. The name is nul-terminated. The actual number of characters written into
uniformBlockName, excluding the nul terminator, is returned in
NULL, no length is returned.
bufSize contains the maximum number of characters (including the nul terminator) that will be written into
If an error occurs, nothing will be 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.
GL_INVALID_VALUE is generated if
uniformBlockIndex is greater than or equal to the value of
GL_ACTIVE_UNIFORM_BLOCKS or is not the index of an active uniform block in
|OpenGL ES API Version|
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