GLAPI/glGetSubroutineIndex: Difference between revisions
m Renaming category: 'GL 4 API Shader Program Query' to 'Core API Ref Shader Program Query'. |
m Renaming category: 'API Reference 4' to 'Core API Reference'. |
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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/ http://opencontent.org/openpub/]. | 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/ http://opencontent.org/openpub/]. | ||
[[Category:Core API Ref Shader Program Query|GetSubroutineIndex]] | [[Category:Core API Ref Shader Program Query|GetSubroutineIndex]] | ||
[[Category:Core API Reference|GetSubroutineIndex]] | |||
Revision as of 07:47, 26 February 2012
| Core in version | 4.6 | |
|---|---|---|
| Core since version | 4.0 | |
| Core ARB extension | ARB_shader_subroutine | |
glGetSubroutineIndex: retrieve the index of a subroutine uniform of a given shader stage within a program
Function Definition
GLuint glGetSubroutineIndex(GLuint program, GLenum shadertype, const GLchar *name);
- program
- Specifies the name of the program containing shader stage.
- shadertype
- Specifies the shader stage from which to query for subroutine uniform index. shadertype must be one of GL_VERTEX_SHADER, GL_TESS_CONTROL_SHADER, GL_TESS_EVALUATION_SHADER, GL_GEOMETRY_SHADER or GL_FRAGMENT_SHADER.
- name
- Specifies the name of the subroutine uniform whose index to query.
Description
glGetSubroutineIndex returns the index of a subroutine uniform within a shader stage attached to a program object. program contains the name of the program to which the shader is attached. shadertype specifies the stage from which to query shader subroutine index. name contains the null-terminated name of the subroutine uniform whose name to query.
If name is not the name of a subroutine uniform in the shader stage, GL_INVALID_INDEX is returned, but no error is generated. If name is the name of a subroutine uniform in the shader stage, a value between zero and the value of GL_ACTIVE_SUBROUTINES minus one will be returned. Subroutine indices are assigned using consecutive integers in the range from zero to the value of GL_ACTIVE_SUBROUTINES minus one for the shader stage.
Errors
GL_INVALID_ENUM is generated if shadertype or pname is not one of the accepted values.
GL_INVALID_VALUE is generated if program is not the name of an existing program object.
See Also
glGetProgram, glGetActiveSubroutineUniform, glGetActiveSubroutineUniformName
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/.