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retrieve the range and precision for numeric formats supported by the shader compiler

function glGetShaderPrecisionFormat(int $shadertype, int $precisiontype, int &$range, int &$precision) : void
  1. int $shadertype
  2. int $precisiontype
  3. int $range Specifies the address of array of two integers into which encodings of the implementation's numeric range are returned.
  4. int $precision Specifies the address of an integer into which the numeric precision of the implementation is written.


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