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 SkSweepGradient_DEFINED
10 #define SkSweepGradient_DEFINED
11 
12 #include "SkGradientShaderPriv.h"
13 
14 class SkSweepGradient : public SkGradientShaderBase {
15 public:
16     SkSweepGradient(SkScalar cx, SkScalar cy, const Descriptor&);
17 
18     size_t contextSize() const override;
19 
20     class SweepGradientContext : public SkGradientShaderBase::GradientShaderBaseContext {
21     public:
22         SweepGradientContext(const SkSweepGradient& shader, 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 
35     GradientType asAGradient(GradientInfo* info) const override;
36 
37     virtual bool asFragmentProcessor(GrContext*, const SkPaint&, const SkMatrix& viewM,
38                                      const SkMatrix*, GrColor*,
39                                      GrFragmentProcessor**) const override;
40 
41     SK_TO_STRING_OVERRIDE()
42     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkSweepGradient)
43 
44 protected:
45     void flatten(SkWriteBuffer& buffer) const override;
46     Context* onCreateContext(const ContextRec&, void* storage) const override;
47 
48 private:
49     const SkPoint fCenter;
50 
51     friend class SkGradientShader;
52     typedef SkGradientShaderBase INHERITED;
53 };
54 
55 #endif
56