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 std::unique_ptr<GrFragmentProcessor> asFragmentProcessor(const GrFPArgs& args) const override; 21 #endif 22 23 SkNormalSource::Provider* asProvider(const SkShaderBase::ContextRec& rec, 24 SkArenaAlloc* alloc) const override; 25 26 protected: 27 void flatten(SkWriteBuffer& buf) const override; 28 29 bool computeNormTotalInverse(const SkShaderBase::ContextRec& rec, 30 SkMatrix* normTotalInverse) const; 31 32 private: SK_FLATTENABLE_HOOKS(SkNormalMapSourceImpl)33 SK_FLATTENABLE_HOOKS(SkNormalMapSourceImpl) 34 35 class Provider : public SkNormalSource::Provider { 36 public: 37 Provider(const SkNormalMapSourceImpl& source, SkShaderBase::Context* mapContext); 38 39 void fillScanLine(int x, int y, SkPoint3 output[], int count) const override; 40 41 private: 42 const SkNormalMapSourceImpl& fSource; 43 SkShaderBase::Context* fMapContext; 44 45 typedef SkNormalSource::Provider INHERITED; 46 }; 47 48 sk_sp<SkShader> fMapShader; 49 SkMatrix fInvCTM; // Inverse of the canvas total matrix, used for rotating normals. 50 51 friend class SkNormalSource; 52 53 typedef SkNormalSource INHERITED; 54 }; 55 56 #endif 57 58