1 
2 /*
3  * Copyright 2012 Google Inc.
4  *
5  * Use of this source code is governed by a BSD-style license that can be
6  * found in the LICENSE file.
7  */
8 
9 #ifndef SkRadialGradient_DEFINED
10 #define SkRadialGradient_DEFINED
11 
12 #include "SkGradientShaderPriv.h"
13 
14 class SkRadialGradient : public SkGradientShaderBase {
15 public:
16     SkRadialGradient(const SkPoint& center, SkScalar radius, const Descriptor&);
17 
18     size_t contextSize(const ContextRec&) const override;
19 
20     class RadialGradientContext : public SkGradientShaderBase::GradientShaderBaseContext {
21     public:
22         RadialGradientContext(const SkRadialGradient&, const ContextRec&);
23 
24         void shadeSpan(int x, int y, SkPMColor dstC[], int count) override;
25 
26     private:
27         typedef SkGradientShaderBase::GradientShaderBaseContext INHERITED;
28     };
29 
30     GradientType asAGradient(GradientInfo* info) const override;
31 #if SK_SUPPORT_GPU
32     const GrFragmentProcessor* asFragmentProcessor(GrContext*,
33                                                    const SkMatrix& viewM,
34                                                    const SkMatrix*,
35                                                    SkFilterQuality) const override;
36 #endif
37 
38     SK_TO_STRING_OVERRIDE()
39     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkRadialGradient)
40 
41 protected:
42     SkRadialGradient(SkReadBuffer& buffer);
43     void flatten(SkWriteBuffer& buffer) const override;
44     Context* onCreateContext(const ContextRec&, void* storage) const override;
45 
46 private:
47     const SkPoint fCenter;
48     const SkScalar fRadius;
49 
50     friend class SkGradientShader;
51     typedef SkGradientShaderBase INHERITED;
52 };
53 
54 #endif
55