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glgetprogramstage(3g) [debian man page]

GLGETPROGRAMSTAGE(3G)						  [FIXME: manual]					     GLGETPROGRAMSTAGE(3G)

NAME
glGetProgramStage - retrieve properties of a program object corresponding to a specified shader stage C SPECIFICATION
void glGetProgramStageiv(GLuint program, GLenum shadertype, GLenum pname, GLint *values); PARAMETERS
program Specifies the name of the program containing shader stage. 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. pname Specifies the parameter of the shader to query. pname must be GL_ACTIVE_SUBROUTINE_UNIFORMS, GL_ACTIVE_SUBROUTINE_UNIFORM_LOCATIONS, GL_ACTIVE_SUBROUTINES, GL_ACTIVE_SUBROUTINE_UNIFORM_MAX_LENGTH, or GL_ACTIVE_SUBROUTINE_MAX_LENGTH. values Specifies the address of a variable into which the queried value or values will be placed. DESCRIPTION
glGetProgramStage queries a parameter of 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 the parameter. pname specifies which parameter should be queried. The value or values of the parameter to be queried is returned in the variable whose address is given in values. If pname is GL_ACTIVE_SUBROUTINE_UNIFORMS, the number of active subroutine variables in the stage is returned in values. If pname is GL_ACTIVE_SUBROUTINE_UNIFORM_LOCATIONS, the number of active subroutine variable locations in the stage is returned in values. If pname is GL_ACTIVE_SUBROUTINES, the number of active subroutines in the stage is returned in values. If pname is GL_ACTIVE_SUBROUTINE_UNIFORM_MAX_LENGTH, the length of the longest subroutine uniform for the stage is returned in values. If pname is GL_ACTIVE_SUBROUTINE_MAX_LENGTH, the length of the longest subroutine name for the stage is returned in values. The returned name length includes space for the null-terminator. If there is no shader present of type shadertype, the returned value will be consistent with a shader containing no subroutines or subroutine uniforms. 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() 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 GLGETPROGRAMSTAGE(3G)

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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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