1 /* 2 * Copyright 2020 Google LLC 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 GrMatrixEffect_DEFINED 9 #define GrMatrixEffect_DEFINED 10 11 #include "include/core/SkMatrix.h" 12 #include "include/core/SkTypes.h" 13 #include "include/private/SkColorData.h" 14 #include "include/private/SkSLSampleUsage.h" 15 #include "src/gpu/ganesh/GrFragmentProcessor.h" 16 #include "src/gpu/ganesh/GrProcessorUnitTest.h" 17 18 #include <memory> 19 #include <utility> 20 21 namespace skgpu { class KeyBuilder; } 22 struct GrShaderCaps; 23 24 class GrMatrixEffect : public GrFragmentProcessor { 25 public: 26 static std::unique_ptr<GrFragmentProcessor> Make(const SkMatrix& matrix, 27 std::unique_ptr<GrFragmentProcessor> child); 28 29 std::unique_ptr<GrFragmentProcessor> clone() const override; name()30 const char* name() const override { return "MatrixEffect"; } 31 32 private: 33 GrMatrixEffect(const GrMatrixEffect& src); 34 GrMatrixEffect(SkMatrix matrix,std::unique_ptr<GrFragmentProcessor> child)35 GrMatrixEffect(SkMatrix matrix, std::unique_ptr<GrFragmentProcessor> child) 36 : INHERITED(kGrMatrixEffect_ClassID, ProcessorOptimizationFlags(child.get())) 37 , fMatrix(matrix) { 38 SkASSERT(child); 39 this->registerChild(std::move(child), 40 SkSL::SampleUsage::UniformMatrix(matrix.hasPerspective())); 41 } 42 43 std::unique_ptr<ProgramImpl> onMakeProgramImpl() const override; 44 void onAddToKey(const GrShaderCaps&, skgpu::KeyBuilder*) const override; 45 bool onIsEqual(const GrFragmentProcessor&) const override; constantOutputForConstantInput(const SkPMColor4f & inputColor)46 SkPMColor4f constantOutputForConstantInput(const SkPMColor4f& inputColor) const override { 47 return ConstantOutputForConstantInput(this->childProcessor(0), inputColor); 48 } 49 50 SkMatrix fMatrix; 51 52 GR_DECLARE_FRAGMENT_PROCESSOR_TEST 53 using INHERITED = GrFragmentProcessor; 54 }; 55 #endif 56