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1 /*
2  * Copyright 2014 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 SkLocalMatrixShader_DEFINED
9 #define SkLocalMatrixShader_DEFINED
10 
11 #include "src/core/SkReadBuffer.h"
12 #include "src/core/SkWriteBuffer.h"
13 #include "src/shaders/SkShaderBase.h"
14 
15 class GrFragmentProcessor;
16 class SkArenaAlloc;
17 
18 class SkLocalMatrixShader final : public SkShaderBase {
19 public:
SkLocalMatrixShader(sk_sp<SkShader> proxy,const SkMatrix & localMatrix)20     SkLocalMatrixShader(sk_sp<SkShader> proxy, const SkMatrix& localMatrix)
21     : INHERITED(&localMatrix)
22     , fProxyShader(std::move(proxy))
23     {}
24 
asAGradient(GradientInfo * info)25     GradientType asAGradient(GradientInfo* info) const override {
26         return fProxyShader->asAGradient(info);
27     }
28 
29 #if SK_SUPPORT_GPU
30     std::unique_ptr<GrFragmentProcessor> asFragmentProcessor(const GrFPArgs&) const override;
31 #endif
32 
makeAsALocalMatrixShader(SkMatrix * localMatrix)33     sk_sp<SkShader> makeAsALocalMatrixShader(SkMatrix* localMatrix) const override {
34         if (localMatrix) {
35             *localMatrix = this->getLocalMatrix();
36         }
37         return fProxyShader;
38     }
39 
40 protected:
41     void flatten(SkWriteBuffer&) const override;
42 
43 #ifdef SK_ENABLE_LEGACY_SHADERCONTEXT
44     Context* onMakeContext(const ContextRec&, SkArenaAlloc*) const override;
45 #endif
46 
47     SkImage* onIsAImage(SkMatrix* matrix, SkTileMode* mode) const override;
48 
49     bool onAppendStages(const SkStageRec&) const override;
50 
51     skvm::Color onProgram(skvm::Builder*, skvm::Coord device, skvm::Coord local, skvm::Color paint,
52                           const SkMatrixProvider&, const SkMatrix* localM, const SkColorInfo& dst,
53                           skvm::Uniforms* uniforms, SkArenaAlloc*) const override;
54 
55 private:
56     SK_FLATTENABLE_HOOKS(SkLocalMatrixShader)
57 
58     sk_sp<SkShader> fProxyShader;
59 
60     using INHERITED = SkShaderBase;
61 };
62 
63 #endif
64