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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_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 © 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			  03/16/2013	      GLGETSHADERPRECISION(3G)

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