3 * Copyright 2012 Google Inc.
5 * Use of this source code is governed by a BSD-style license that can be
6 * found in the LICENSE file.
9 #ifndef SkTwoPointRadialGradient_DEFINED
10 #define SkTwoPointRadialGradient_DEFINED
12 #include "SkGradientShaderPriv.h"
14 class SkTwoPointRadialGradient : public SkGradientShaderBase {
16 SkTwoPointRadialGradient(const SkPoint& start, SkScalar startRadius,
17 const SkPoint& end, SkScalar endRadius,
20 virtual BitmapType asABitmap(SkBitmap* bitmap,
22 TileMode* xy) const SK_OVERRIDE;
23 virtual GradientType asAGradient(GradientInfo* info) const SK_OVERRIDE;
24 virtual bool asNewEffect(GrContext* context, const SkPaint&, const SkMatrix*, GrColor*,
25 GrEffect**) const SK_OVERRIDE;
27 virtual size_t contextSize() const SK_OVERRIDE;
29 class TwoPointRadialGradientContext : public SkGradientShaderBase::GradientShaderBaseContext {
31 TwoPointRadialGradientContext(const SkTwoPointRadialGradient&, const ContextRec&);
33 virtual void shadeSpan(int x, int y, SkPMColor dstC[], int count) SK_OVERRIDE;
36 typedef SkGradientShaderBase::GradientShaderBaseContext INHERITED;
39 SkScalar getCenterX1() const { return fDiff.length(); }
40 SkScalar getStartRadius() const { return fStartRadius; }
41 SkScalar getDiffRadius() const { return fDiffRadius; }
43 SK_TO_STRING_OVERRIDE()
44 SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkTwoPointRadialGradient)
47 SkTwoPointRadialGradient(SkReadBuffer& buffer);
48 virtual void flatten(SkWriteBuffer& buffer) const SK_OVERRIDE;
49 virtual Context* onCreateContext(const ContextRec&, void* storage) const SK_OVERRIDE;
52 const SkPoint fCenter1;
53 const SkPoint fCenter2;
54 const SkScalar fRadius1;
55 const SkScalar fRadius2;
57 SkScalar fStartRadius, fDiffRadius, fSr2D2, fA, fOneOverTwoA;
61 typedef SkGradientShaderBase INHERITED;