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comparison: gfx/skia/trunk/src/effects/gradients/SkTwoPointConicalGradient.h
gfx/skia/trunk/src/effects/gradients/SkTwoPointConicalGradient.h
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
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| -1:000000000000 | 0:76a50a0aa295 |
|---|---|
| 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 SkTwoPointConicalGradient_DEFINED | |
| 10 #define SkTwoPointConicalGradient_DEFINED | |
| 11 | |
| 12 #include "SkGradientShaderPriv.h" | |
| 13 | |
| 14 struct TwoPtRadial { | |
| 15 enum { | |
| 16 kDontDrawT = 0x80000000 | |
| 17 }; | |
| 18 | |
| 19 float fCenterX, fCenterY; | |
| 20 float fDCenterX, fDCenterY; | |
| 21 float fRadius; | |
| 22 float fDRadius; | |
| 23 float fA; | |
| 24 float fRadius2; | |
| 25 float fRDR; | |
| 26 | |
| 27 void init(const SkPoint& center0, SkScalar rad0, | |
| 28 const SkPoint& center1, SkScalar rad1); | |
| 29 | |
| 30 // used by setup and nextT | |
| 31 float fRelX, fRelY, fIncX, fIncY; | |
| 32 float fB, fDB; | |
| 33 | |
| 34 void setup(SkScalar fx, SkScalar fy, SkScalar dfx, SkScalar dfy); | |
| 35 SkFixed nextT(); | |
| 36 | |
| 37 static bool DontDrawT(SkFixed t) { | |
| 38 return kDontDrawT == (uint32_t)t; | |
| 39 } | |
| 40 }; | |
| 41 | |
| 42 | |
| 43 class SkTwoPointConicalGradient : public SkGradientShaderBase { | |
| 44 TwoPtRadial fRec; | |
| 45 void init(); | |
| 46 | |
| 47 public: | |
| 48 SkTwoPointConicalGradient(const SkPoint& start, SkScalar startRadius, | |
| 49 const SkPoint& end, SkScalar endRadius, | |
| 50 const Descriptor&); | |
| 51 | |
| 52 virtual void shadeSpan(int x, int y, SkPMColor* dstCParam, | |
| 53 int count) SK_OVERRIDE; | |
| 54 virtual bool setContext(const SkBitmap& device, | |
| 55 const SkPaint& paint, | |
| 56 const SkMatrix& matrix) SK_OVERRIDE; | |
| 57 | |
| 58 virtual BitmapType asABitmap(SkBitmap* bitmap, | |
| 59 SkMatrix* matrix, | |
| 60 TileMode* xy) const; | |
| 61 virtual SkShader::GradientType asAGradient(GradientInfo* info) const SK_OVERRIDE; | |
| 62 virtual GrEffectRef* asNewEffect(GrContext* context, const SkPaint& paint) const SK_OVERRIDE; | |
| 63 virtual bool isOpaque() const SK_OVERRIDE; | |
| 64 | |
| 65 SkScalar getCenterX1() const { return SkPoint::Distance(fCenter1, fCenter2); } | |
| 66 SkScalar getStartRadius() const { return fRadius1; } | |
| 67 SkScalar getDiffRadius() const { return fRadius2 - fRadius1; } | |
| 68 | |
| 69 SK_TO_STRING_OVERRIDE() | |
| 70 SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkTwoPointConicalGradient) | |
| 71 | |
| 72 protected: | |
| 73 SkTwoPointConicalGradient(SkReadBuffer& buffer); | |
| 74 virtual void flatten(SkWriteBuffer& buffer) const SK_OVERRIDE; | |
| 75 | |
| 76 private: | |
| 77 typedef SkGradientShaderBase INHERITED; | |
| 78 const SkPoint fCenter1; | |
| 79 const SkPoint fCenter2; | |
| 80 const SkScalar fRadius1; | |
| 81 const SkScalar fRadius2; | |
| 82 }; | |
| 83 | |
| 84 #endif |
