glgetsubroutineuniformlocation(3g) [debian man page]
GLGETSUBROUTINEUNIFO(3G) [FIXME: manual] GLGETSUBROUTINEUNIFO(3G) NAME
glGetSubroutineUniformLocation - retrieve the location of a subroutine uniform of a given shader stage within a program C SPECIFICATION
GLint glGetSubroutineUniformLocation(GLuint program, GLenum shadertype, const GLchar *name); PARAMETERS
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
glGetSubroutineUniformLocation returns the location of the subroutine uniform variable name in the shader stage of type shadertype attached to program, with behavior otherwise identical to glGetUniformLocation(). If name is not the name of a subroutine uniform in the shader stage, -1 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_SUBROUTINE_LOCATIONS minus one will be returned. Subroutine locations are assigned using consecutive integers in the range from zero to the value of GL_ACTIVE_SUBROUTINE_LOCATIONS minus one for the shader stage. For active subroutine uniforms declared as arrays, the declared array elements are assigned consecutive locations. 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(), glGetUniformLocation() COPYRIGHT
Copyright (C) 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/. [FIXME: source] 05/30/2012 GLGETSUBROUTINEUNIFO(3G)
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GLGETACTIVESUBROUTIN(3G) [FIXME: manual] GLGETACTIVESUBROUTIN(3G) NAME
glGetActiveSubroutineUniformName - query the name of an active shader subroutine uniform C SPECIFICATION
void glGetActiveSubroutineUniformName(GLuint program, GLenum shadertype, GLuint index, GLsizei bufsize, GLsizei *length, GLchar *name); PARAMETERS
program Specifies the name of the program containing the subroutine. shadertype Specifies the shader stage from which to query for the subroutine parameter. shadertype must be one of GL_VERTEX_SHADER, GL_TESS_CONTROL_SHADER, GL_TESS_EVALUATION_SHADER, GL_GEOMETRY_SHADER or GL_FRAGMENT_SHADER. index Specifies the index of the shader subroutine uniform. bufsize Specifies the size of the buffer whose address is given in name. length Specifies the address of a variable into which is written the number of characters copied into name. name Specifies the address of a buffer that will receive the name of the specified shader subroutine uniform. DESCRIPTION
glGetActiveSubroutineUniformName retrieves the name of an active shader subroutine uniform. program contains the name of the program containing the uniform. shadertype specifies the stage for which which the uniform location, given by index, is valid. index must be between zero and the value of GL_ACTIVE_SUBROUTINE_UNIFORMS minus one for the shader stage. The uniform name is returned as a null-terminated string 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. The length of the longest subroutine uniform name in program and shadertype is given by the value of GL_ACTIVE_SUBROUTINE_UNIFORM_MAX_LENGTH, which can be queried with glGetProgramStage(). ERRORS
GL_INVALID_ENUM is generated if shadertype or pname is not one of the accepted values. GL_INVALID_VALUE is generated if index is greater than or equal to the value of GL_ACTIVE_SUBROUTINES. GL_INVALID_VALUE is generated if program is not the name of an existing program object. ASSOCIATED GETS
glGetProgramStage() with argument GL_ACTIVE_SUBROUTINE_UNIFORMS SEE ALSO
glGetSubroutineIndex(), glGetActiveSubroutineUniform(), glGetProgramStage() COPYRIGHT
Copyright (C) 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/. [FIXME: source] 05/30/2012 GLGETACTIVESUBROUTIN(3G)