glGetProgramResourceIndex - query the index of a named resource within a program

GLuintglGetProgramResourceIndex(GLuintprogram,GLenumprogramInterface,constchar*name);

       Copyright © 2013-2014 Khronos Group

[FIXME: source]                                    11/18/2024                           GLGETPROGRAMRESOURCE(3G)

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 following values:

       GL_UNIFORM
           The query is targeted at the set of active uniforms within program.

       GL_UNIFORM_BLOCK
           The query is targeted at the set of active uniform blocks within program.

       GL_PROGRAM_INPUT
           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.

       GL_PROGRAM_OUTPUT
           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.

       GL_VERTEX_SUBROUTINE_UNIFORM, GL_TESS_CONTROL_SUBROUTINE_UNIFORM, GL_TESS_EVALUATION_SUBROUTINE_UNIFORM,
       GL_GEOMETRY_SUBROUTINE_UNIFORM, GL_FRAGMENT_SUBROUTINE_UNIFORM, GL_COMPUTE_SUBROUTINE_UNIFORM
           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.

       GL_TRANSFORM_FEEDBACK_VARYING
           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.

       GL_TRANSFORM_FEEDBACK_BUFFER
           The query is targeted at the set of active buffer binding points to which output variables in the
           GL_TRANSFORM_FEEDBACK_VARYING interface are written.

       GL_BUFFER_VARIABLE
           The query is targeted at the set of active buffer variables used by program.

       GL_SHADER_STORAGE_BLOCK
           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 "[0]" 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 types.

       GL_INVALID_ENUM is generated if programInterface is GL_ATOMIC_COUNTER_BUFFER or
       GL_TRANSFORM_FEEDBACK_BUFFER, since active atomic counter and transform feedback buffer resources are not
       assigned name strings.

       Although not an error, GL_INVALID_INDEX is returned if name is not the name of a resource within the
       interface identified by programInterface.

       glGetProgramResourceIndex - query the index of a named resource within a program

program
           The name of a program object whose resources to query.

       programInterface
           A token identifying the interface within program containing the resource named name.

       name
           The name of the resource to query the index of.

glGetProgramResourceName(), glGetProgramResource(), glGetProgramResourceLocation(),
       glGetProgramResourceLocationIndex().

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       ├───────────────────────────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┤
       │ glGetProgramResourceIndex │  -  │  -  │  -  │  -  │  -  │  -  │  -  │  -  │  -  │  ✔  │  ✔  │  ✔  │
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