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 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         void shadeSpan16(int x, int y, uint16_t dstC[], int count) override;
26 
27     private:
28         typedef SkGradientShaderBase::GradientShaderBaseContext INHERITED;
29     };
30 
31     virtual BitmapType asABitmap(SkBitmap* bitmap,
32                                  SkMatrix* matrix,
33                                  TileMode* xy) const override;
34     GradientType asAGradient(GradientInfo* info) const override;
35     virtual bool asFragmentProcessor(GrContext*, const SkPaint&, const SkMatrix& viewM,
36                                      const SkMatrix*, GrColor*,
37                                      GrFragmentProcessor**) const override;
38 
39     SK_TO_STRING_OVERRIDE()
40     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkRadialGradient)
41 
42 protected:
43     SkRadialGradient(SkReadBuffer& buffer);
44     void flatten(SkWriteBuffer& buffer) const override;
45     Context* onCreateContext(const ContextRec&, void* storage) const override;
46 
47 private:
48     friend class SkGradientShader;
49     typedef SkGradientShaderBase INHERITED;
50     const SkPoint fCenter;
51     const SkScalar fRadius;
52 };
53 
54 #endif
55