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GLGETACTIVESUBROUTIN(3G) | [FIXME: manual] | GLGETACTIVESUBROUTIN(3G) |
NAME¶
glGetActiveSubroutineUniform - query a property of an active shader subroutine uniformC SPECIFICATION¶
void
glGetActiveSubroutineUniformiv(GLuint program,
GLenum shadertype, GLuint index,
GLenum pname,
GLint *values);
PARAMETERS¶
programSpecifies 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.
pname
Specifies the parameter of the shader subroutine uniform
to query. pname must be GL_NUM_COMPATIBLE_SUBROUTINES,
GL_COMPATIBLE_SUBROUTINES, GL_UNIFORM_SIZE or
GL_UNIFORM_NAME_LENGTH.
values
Specifies the address of a into which the queried value
or values will be placed.
DESCRIPTION¶
glGetActiveSubroutineUniform queries a parameter of an active shader subroutine uniform. program contains the name of the program containing the uniform. shadertype specifies the stage 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. If pname is GL_NUM_COMPATIBLE_SUBROUTINES, a single integer indicating the number of subroutines that can be assigned to the uniform is returned in values. If pname is GL_COMPATIBLE_SUBROUTINES, an array of integers is returned in values, with each integer specifying the index of an active subroutine that can be assigned to the selected subroutine uniform. The number of integers returned is the same as the value returned for GL_NUM_COMPATIBLE_SUBROUTINES. If pname is GL_UNIFORM_SIZE, a single integer is returned in values. If the selected subroutine uniform is an array, the declared size of the array is returned; otherwise, one is returned. If pname is GL_UNIFORM_NAME_LENGTH, a single integer specifying the length of the subroutine uniform name (including the terminating null character) is returned in values.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_UNIFORMSVERSION SUPPORT¶
OpenGL Version | ||||||||||||
Function / Feature Name | 2.0 | 2.1 | 3.0 | 3.1 | 3.2 | 3.3 | 4.0 | 4.1 | 4.2 | 4.3 | 4.4 | 4.5 |
glGetActiveSubroutineUniformiv | - | - | - | - | - | - | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ |
SEE ALSO¶
glGetSubroutineIndex(), glGetActiveSubroutineUniformName(), glGetProgramStage()COPYRIGHT¶
Copyright © 2010-2014 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/.COPYRIGHT¶
Copyright © 2010-2014 Khronos Group.08/26/2014 | [FIXME: source] |