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/SkM44.h" |
12 | #include "include/core/SkTypes.h" |
13 | |
14 | #include "src/gpu/GrFragmentProcessor.h" |
15 | |
16 | class GrMatrixEffect : public GrFragmentProcessor { |
17 | public: |
18 | static std::unique_ptr<GrFragmentProcessor> Make( |
19 | const SkMatrix& matrix, std::unique_ptr<GrFragmentProcessor> child) { |
20 | if (matrix.isIdentity()) { |
21 | return child; |
22 | } |
23 | return std::unique_ptr<GrFragmentProcessor>(new GrMatrixEffect(matrix, std::move(child))); |
24 | } |
25 | |
26 | std::unique_ptr<GrFragmentProcessor> clone() const override; |
27 | const char* name() const override { return "MatrixEffect"; } |
28 | const SkMatrix& matrix() const { return fMatrix; } |
29 | |
30 | private: |
31 | GrMatrixEffect(const GrMatrixEffect& src); |
32 | |
33 | GrMatrixEffect(SkMatrix matrix, std::unique_ptr<GrFragmentProcessor> child) |
34 | : INHERITED(kGrMatrixEffect_ClassID, ProcessorOptimizationFlags(child.get())) |
35 | , fMatrix(matrix) { |
36 | SkASSERT(child); |
37 | this->registerChild(std::move(child), |
38 | SkSL::SampleUsage::UniformMatrix( |
39 | "matrix", matrix.hasPerspective())); |
40 | } |
41 | |
42 | GrGLSLFragmentProcessor* onCreateGLSLInstance() const override; |
43 | void onGetGLSLProcessorKey(const GrShaderCaps&, GrProcessorKeyBuilder*) const override; |
44 | bool onIsEqual(const GrFragmentProcessor&) const override; |
45 | SkPMColor4f constantOutputForConstantInput(const SkPMColor4f& inputColor) const override { |
46 | return ConstantOutputForConstantInput(this->childProcessor(0), inputColor); |
47 | } |
48 | |
49 | SkMatrix fMatrix; |
50 | |
51 | GR_DECLARE_FRAGMENT_PROCESSOR_TEST |
52 | typedef GrFragmentProcessor INHERITED; |
53 | }; |
54 | #endif |
55 |