glgetshaderprecisionformat(3g) [centos man page]
GLGETSHADERPRECISION(3G) OpenGL Manual GLGETSHADERPRECISION(3G) NAME
glGetShaderPrecisionFormat - retrieve the range and precision for numeric formats supported by the shader compiler C SPECIFICATION
void glGetShaderPrecisionFormat(GLenum shaderType, GLenum precisionType, GLint *range, GLint *precision); PARAMETERS
shaderType Specifies the type of shader whose precision to query. shaderType must be GL_VERTEX_SHADER or GL_FRAGMENT_SHADER. precisionType Specifies the numeric format whose precision and range to query. range Specifies the address of array of two integers into which encodings of the implementation's numeric range are returned. precision Specifies the address of an integer into which the numeric precision of the implementation is written. DESCRIPTION
glGetShaderPrecisionFormat retrieves the numeric range and precision for the implementation's representation of quantities in different numeric formats in specified shader type. shaderType specifies the type of shader for which the numeric precision and range is to be retrieved and must be one of GL_VERTEX_SHADER or GL_FRAGMENT_SHADER. precisionType specifies the numeric format to query and must be one of GL_LOW_FLOAT, GL_MEDIUM_FLOATGL_HIGH_FLOAT, GL_LOW_INT, GL_MEDIUM_INT, or GL_HIGH_INT. range points to an array of two integers into which the format's numeric range will be returned. If min and max are the smallest values representable in the format, then the values returned are defined to be: range[0] = floor(log2(|min|)) and range[1] = floor(log2(|max|)). precision specifies the address of an integer into which will be written the log2 value of the number of bits of precision of the format. If the smallest representable value greater than 1 is 1 + eps, then the integer addressed by precision will contain floor(-log2(eps)). ERRORS
GL_INVALID_ENUM is generated if shaderType or precisionType is not an accepted value. 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/. AUTHORS
opengl.org opengl.org 06/10/2014 GLGETSHADERPRECISION(3G)
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GLGETACTIVESUBROUTIN(3G) OpenGL Manual GLGETACTIVESUBROUTIN(3G) NAME
glGetActiveSubroutineUniform - query a property of an active shader subroutine uniform C SPECIFICATION
void glGetActiveSubroutineUniformiv(GLuint program, GLenum shadertype, GLuint index, GLenum pname, GLint *values); 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. 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_UNIFORMS SEE ALSO
glGetSubroutineIndex(), glGetActiveSubroutineUniformName(), 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/. AUTHORS
opengl.org opengl.org 06/10/2014 GLGETACTIVESUBROUTIN(3G)