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/*
* Copyright 2012 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "GrTypes.h"
#ifndef GrGLByteColorConversion_DEFINED
#define GrGLByteColorConversion_DEFINED
class GrGLContextInfo;
enum GrGLByteColorConversion {
kUnknown_GrGLByteColorConversion,
kHigh_GrGLByteColorConversion,
kRound_GrGLByteColorConversion,
kLow_GrGLByteColorConversion
};
/**
* When a fragment shader outputs to a RGBA8888 pixel format the floating point
* result has to be converted to bytes. We would expect that the conversion of
* floating-point component f to be something like round(f * 255). However,
* experience shows that is common for the conversion to be biased towards
* larger than expected byte values, particularly in the low part of the range.
*
* This function determines experimentally whether that is true for the current
* OpenGL context accessible via ctxInfo.
*/
GrGLByteColorConversion
GrGLFloatToByteColorConversion(const GrGLContextInfo& ctxInfo);
#endif
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