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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                     const SkMatrix* localMatrix);
18 
19     virtual size_t contextSize() const SK_OVERRIDE;
20 
21     class SweepGradientContext : public SkGradientShaderBase::GradientShaderBaseContext {
22     public:
23         SweepGradientContext(const SkSweepGradient& shader, const ContextRec&);
24 
25         virtual void shadeSpan(int x, int y, SkPMColor dstC[], int count) SK_OVERRIDE;
26         virtual void shadeSpan16(int x, int y, uint16_t dstC[], int count) SK_OVERRIDE;
27 
28     private:
29         typedef SkGradientShaderBase::GradientShaderBaseContext INHERITED;
30     };
31 
32     virtual BitmapType asABitmap(SkBitmap* bitmap,
33                                  SkMatrix* matrix,
34                                  TileMode* xy) const SK_OVERRIDE;
35 
36     virtual GradientType asAGradient(GradientInfo* info) const SK_OVERRIDE;
37 
38     virtual bool asNewEffect(GrContext*, const SkPaint&, const SkMatrix*, GrColor*, GrEffectRef**)
39         const SK_OVERRIDE;
40 
41     SK_TO_STRING_OVERRIDE()
42     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkSweepGradient)
43 
44 protected:
45     SkSweepGradient(SkReadBuffer& buffer);
46     virtual void flatten(SkWriteBuffer& buffer) const SK_OVERRIDE;
47     virtual Context* onCreateContext(const ContextRec&, void* storage) const SK_OVERRIDE;
48 
49 private:
50     const SkPoint fCenter;
51 
52     typedef SkGradientShaderBase INHERITED;
53 };
54 
55 #endif
56