glGetProgramResourceName — query the name of an indexed resource within a program
void glGetProgramResourceName( | GLuint | program, |
| GLenum | programInterface, | |
| GLuint | index, | |
| GLsizei | bufSize, | |
| GLsizei * | length, | |
| char * | name); |
programThe name of a program object whose resources to query.
programInterface
A token identifying the interface within program containing the indexed resource.
index
The index of the resource within programInterface of program.
bufSize
The size of the character array whose address is given by name.
lengthThe address of a variable which will receive the length of the resource name.
nameThe address of a character array into which will be written the name of the resource.
glGetProgramResourceName retrieves the name string
assigned to the single active resource with an index of index
in the interface programInterface of program object
program. index must be less than
the number of entries in the active resource list for programInterface.
program must be the name of an existing program object. programInterface
is the name of the interface within program which contains the resource and 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_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.
The name string assigned to the active resource identified by index is
returned as a null-terminated string in the character array whose address is given in name. The actual number of
characters written into name, excluding the null terminator, is returned
in length. If length is NULL, no length is returned. The maximum
number of characters that may be written into name, including the null
terminator, is specified by bufSize. If the length of the name string
including the null terminator is greater than bufSize, the first
bufSize-1 characters of the name string will be written to name,
followed by a null terminator. If bufSize is zero, no error will be
generated but no characters will be written to name. The length of the
longest name string for programInterface>, including a null terminator,
can be queried by calling glGetProgramInterface with a pname of
GL_MAX_NAME_LENGTH.
GL_INVALID_ENUM is generated if programInterface
is not one of the accepted interface types.
GL_INVALID_VALUE is generated if progam is not
the name of an existing program.
GL_INVALID_VALUE is generated if index is greater
than or equal to the number of entries in the active resource list for
programInterface.
glGetProgramResourceIndex, glGetGetProgramResource, glGetProgramResourceLocation, glGetProgramResourceLocationIndex.
Copyright © 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. http://opencontent.org/openpub/.