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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 SkTwoPointRadialGradient_DEFINED | |
10 #define SkTwoPointRadialGradient_DEFINED | |
11 | |
12 #include "SkGradientShaderPriv.h" | |
13 | |
14 class SkTwoPointRadialGradient : public SkGradientShaderBase { | |
15 public: | |
16 SkTwoPointRadialGradient(const SkPoint& start, SkScalar startRadius, | |
17 const SkPoint& end, SkScalar endRadius, | |
18 const Descriptor&); | |
19 | |
20 virtual BitmapType asABitmap(SkBitmap* bitmap, | |
21 SkMatrix* matrix, | |
22 TileMode* xy) const override; | |
23 GradientType asAGradient(GradientInfo* info) const override; | |
24 virtual bool asFragmentProcessor(GrContext* context, const SkPaint&, const S
kMatrix& viewM, | |
25 const SkMatrix*, GrColor*, | |
26 GrFragmentProcessor**) const override; | |
27 | |
28 size_t contextSize() const override; | |
29 | |
30 class TwoPointRadialGradientContext : public SkGradientShaderBase::GradientS
haderBaseContext { | |
31 public: | |
32 TwoPointRadialGradientContext(const SkTwoPointRadialGradient&, const Con
textRec&); | |
33 | |
34 void shadeSpan(int x, int y, SkPMColor dstC[], int count) override; | |
35 | |
36 private: | |
37 typedef SkGradientShaderBase::GradientShaderBaseContext INHERITED; | |
38 }; | |
39 | |
40 SkScalar getCenterX1() const { return fDiff.length(); } | |
41 SkScalar getStartRadius() const { return fStartRadius; } | |
42 SkScalar getDiffRadius() const { return fDiffRadius; } | |
43 | |
44 SK_TO_STRING_OVERRIDE() | |
45 SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkTwoPointRadialGradient
) | |
46 | |
47 protected: | |
48 SkTwoPointRadialGradient(SkReadBuffer& buffer); | |
49 void flatten(SkWriteBuffer& buffer) const override; | |
50 Context* onCreateContext(const ContextRec&, void* storage) const override; | |
51 | |
52 private: | |
53 const SkPoint fCenter1; | |
54 const SkPoint fCenter2; | |
55 const SkScalar fRadius1; | |
56 const SkScalar fRadius2; | |
57 SkPoint fDiff; | |
58 SkScalar fStartRadius, fDiffRadius, fSr2D2, fA, fOneOverTwoA; | |
59 | |
60 friend class SkGradientShader; | |
61 typedef SkGradientShaderBase INHERITED; | |
62 }; | |
63 | |
64 #endif | |
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