GLGETPROGRAMRESOURCE(3G) OpenGL Manual GLGETPROGRAMRESOURCE(3G)
glGetProgramResourceIndex - query the index of a named resource within a program
GLuint glGetProgramResourceIndex(GLuint program, GLenum programInterface,
const char * name);
The name of a program object whose resources to query.
A token identifying the interface within program containing the resource named name.
The name of the resource to query the index of.
glGetProgramResourceIndex returns the unsigned integer index assigned to a resource named
name in the interface type programInterface of program object program.
program must be the name of an existing program object. programInterface is the name of
the interface within program which contains the resource named nameand must be one of the
The query is targeted at the set of active uniforms within program.
The query is targeted at the set of active uniform blocks within program.
The query is targeted at the set of active input variables used by the first shader
stage of program. If program contains multiple shader stages then input variables from
any stage other than the first will not be enumerated.
The query is targeted at the set of active output variables produced by the last
shader stage of program. If program contains multiple shader stages then output
variables from any stage other than the last will not be enumerated.
GL_VERTEX_SUBROUTINE, GL_TESS_CONTROL_SUBROUTINE, GL_TESS_EVALUATION_SUBROUTINE,
GL_GEOMETRY_SUBROUTINE, GL_FRAGMENT_SUBROUTINE, GL_COMPUTE_SUBROUTINE
The query is targeted at the set of active subroutines for the vertex,
tessellation control, tessellation evaluation, geometry, fragment and compute shader
stages of program, respectively.
The query is targeted at the set of active subroutine uniform
variables used by the vertex, tessellation control, tessellation evaluation, geometry,
fragment and compute shader stages of program, respectively.
The query is targeted at the set of output variables from the last non-fragment stage
of program that would be captured if transform feedback were active.
The query is targeted at the set of active buffer variables used by program.
The query is targeted at the set of active shader storage blocks used by program.
If name exactly matches the name string of one of the active resources for
programInterface, the index of the matched resource is returned. Additionally, if name
would exactly match the name string of an active resource if "" were appended to name,
the index of the matched resource is returned. Otherwise, name is considered not to be the
name of an active resource, and GL_INVALID_INDEX is returned.
For the interface GL_TRANSFORM_FEEDBACK_VARYING, the value GL_INVALID_INDEX should be
returned when querying the index assigned to the special names gl_NextBuffer,
gl_SkipComponents1, gl_SkipComponents2, gl_SkipComponents3, or gl_SkipComponents4.
GL_INVALID_ENUM is generated if programInterface is not one of the accepted interface
Although not an error, GL_INVALID_INDEX is returned if name is not the name of a resource
within the interface identified by programInterface.
glGetProgramResourceName(), glGetGetProgramResource(), glGetProgramResourceLocation(),
Copyright (C) 2012 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 GLGETPROGRAMRESOURCE(3G)