1 /* 2 * Copyright 2016 Google Inc. 3 * 4 * Use of this source code is governed by a BSD-style license that can be 5 * found in the LICENSE file. 6 */ 7 8 #ifndef GrColorSpaceXform_DEFINED 9 #define GrColorSpaceXform_DEFINED 10 11 #include "GrColor.h" 12 #include "SkMatrix44.h" 13 #include "SkRefCnt.h" 14 15 class SkColorSpace; 16 17 /** 18 * Represents a color gamut transformation (as a 4x4 color matrix) 19 */ 20 class GrColorSpaceXform : public SkRefCnt { 21 public: 22 GrColorSpaceXform(const SkMatrix44& srcToDst); 23 24 static sk_sp<GrColorSpaceXform> Make(const SkColorSpace* src, const SkColorSpace* dst); 25 26 const SkMatrix44& srcToDst() const { return fSrcToDst; } 27 28 /** 29 * GrGLSLFragmentProcessor::GenKey() must call this and include the returned value in its 30 * computed key. 31 */ 32 static uint32_t XformKey(const GrColorSpaceXform* xform) { 33 // Code generation changes if there is an xform, but it otherwise constant 34 return SkToBool(xform) ? 1 : 0; 35 } 36 37 static bool Equals(const GrColorSpaceXform* a, const GrColorSpaceXform* b); 38 39 GrColor4f apply(const GrColor4f& srcColor); 40 41 private: 42 SkMatrix44 fSrcToDst; 43 }; 44 45 #endif 46
