NAME¶
glGetUniformBlockIndex - retrieve the index of a named uniform block
C SPECIFICATION¶
GLuint
glGetUniformBlockIndex(GLuint program,
const GLchar *uniformBlockName);
PARAMETERS¶
program
Specifies the name of a program containing the
uniform block.
uniformBlockName
Specifies the address an array of characters
to containing the name of the uniform block whose index to retrieve.
DESCRIPTION¶
glGetUniformBlockIndex retrieves the index of a uniform block 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 limit.
uniformBlockName must contain a nul-terminated string specifying the name
of the uniform block.
glGetUniformBlockIndex returns the uniform block index for the uniform
block named
uniformBlockName of
program. If
uniformBlockName does not identify an active uniform block of
program,
glGetUniformBlockIndex returns the special identifier,
GL_INVALID_INDEX. Indices of the active uniform blocks of a program are
assigned in consecutive order, beginning with zero.
ERRORS¶
GL_INVALID_OPERATION is generated if
program is not the name of a
program object for which
glLinkProgram() has been called in the past.
NOTES¶
glGetUniformBlockIndex is available only if the GL version is 3.1 or
greater.
SEE ALSO¶
glGetActiveUniformBlockName(),
glGetActiveUniformBlock(),
glLinkProgram()
COPYRIGHT¶
Copyright © 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.
http://opencontent.org/openpub/.