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1 /*
2  * Copyright 2012 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 SkLinearGradient_DEFINED
9 #define SkLinearGradient_DEFINED
10 
11 #include "SkGradientShaderPriv.h"
12 
13 class SkLinearGradient : public SkGradientShaderBase {
14 public:
15     SkLinearGradient(const SkPoint pts[2], const Descriptor&);
16 
17     GradientType asAGradient(GradientInfo* info) const override;
18 #if SK_SUPPORT_GPU
19     std::unique_ptr<GrFragmentProcessor> asFragmentProcessor(const GrFPArgs&) const override;
20 #endif
21 
22     SK_TO_STRING_OVERRIDE()
23     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkLinearGradient)
24 
25 protected:
26     SkLinearGradient(SkReadBuffer& buffer);
27     void flatten(SkWriteBuffer& buffer) const override;
28     Context* onMakeContext(const ContextRec&, SkArenaAlloc*) const override;
29     Context* onMakeBurstPipelineContext(const ContextRec&, SkArenaAlloc*) const override;
30 
31     void appendGradientStages(SkArenaAlloc* alloc, SkRasterPipeline* tPipeline,
32                               SkRasterPipeline* postPipeline) const final;
33 
34 
35     sk_sp<SkShader> onMakeColorSpace(SkColorSpaceXformer* xformer) const override;
36 
37 private:
38     class LinearGradient4fContext;
39 
40     friend class SkGradientShader;
41     typedef SkGradientShaderBase INHERITED;
42     const SkPoint fStart;
43     const SkPoint fEnd;
44 };
45 
46 #endif
47