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glGetShaderPrecisionFormat(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.

VERSION SUPPORT

   
                                              OpenGL Version                                         
   
   Function                    2.0  2.1  3.0  3.1  3.2  3.3  4.0  4.1  4.2  4.3  4.4  4.5 
   /                                                                                      
   Feature                                                                                
   Name                                                                                   
   
   glGetShaderPrecisionFormat   -    -    -    -    -    -    -

SEE ALSO

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

[FIXME: source]                   07/22/2015          GLGETSHADERPRECISION(3G)



	    

	    

	
	    
	    

	      
	      

	      
	    

	    

	
	    
      
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