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glgetshaderprecisionformat(3g) [debian man page]

GLGETSHADERPRECISION(3G)					  [FIXME: 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_FLOAT GL_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/.

[FIXME: source] 						    05/30/2012						  GLGETSHADERPRECISION(3G)

Check Out this Related Man Page

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

NAME

       glGetSubroutineIndex - retrieve the index of a subroutine uniform of a given shader stage within a program

C SPECIFICATION

       GLuint glGetSubroutineIndex(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

       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 (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						  GLGETSUBROUTINEINDEX(3G)
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