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 SkNormalMapSource_DEFINED 9 #define SkNormalMapSource_DEFINED 10 11 #include "SkNormalSource.h" 12 13 class SkNormalMapSourceImpl : public SkNormalSource { 14 public: SkNormalMapSourceImpl(sk_sp<SkShader> mapShader,const SkMatrix & invCTM)15 SkNormalMapSourceImpl(sk_sp<SkShader> mapShader, const SkMatrix& invCTM) 16 : fMapShader(std::move(mapShader)) 17 , fInvCTM(invCTM) {} 18 19 #if SK_SUPPORT_GPU 20 sk_sp<GrFragmentProcessor> asFragmentProcessor(const SkShader::AsFPArgs&) const override; 21 #endif 22 23 SkNormalSource::Provider* asProvider(const SkShader::ContextRec& rec, 24 SkArenaAlloc* alloc) const override; 25 26 SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkNormalMapSourceImpl) 27 28 protected: 29 void flatten(SkWriteBuffer& buf) const override; 30 31 bool computeNormTotalInverse(const SkShader::ContextRec& rec, SkMatrix* normTotalInverse) const; 32 33 private: 34 class Provider : public SkNormalSource::Provider { 35 public: 36 Provider(const SkNormalMapSourceImpl& source, SkShader::Context* mapContext); 37 38 void fillScanLine(int x, int y, SkPoint3 output[], int count) const override; 39 40 private: 41 const SkNormalMapSourceImpl& fSource; 42 SkShader::Context* fMapContext; 43 44 typedef SkNormalSource::Provider INHERITED; 45 }; 46 47 sk_sp<SkShader> fMapShader; 48 SkMatrix fInvCTM; // Inverse of the canvas total matrix, used for rotating normals. 49 50 friend class SkNormalSource; 51 52 typedef SkNormalSource INHERITED; 53 }; 54 55 #endif 56 57