1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/skia/trunk/src/effects/gradients/SkTwoPointConicalGradient.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,84 @@
1.4 +
1.5 +/*
1.6 + * Copyright 2012 Google Inc.
1.7 + *
1.8 + * Use of this source code is governed by a BSD-style license that can be
1.9 + * found in the LICENSE file.
1.10 + */
1.11 +
1.12 + #ifndef SkTwoPointConicalGradient_DEFINED
1.13 + #define SkTwoPointConicalGradient_DEFINED
1.14 +
1.15 +#include "SkGradientShaderPriv.h"
1.16 +
1.17 +struct TwoPtRadial {
1.18 + enum {
1.19 + kDontDrawT = 0x80000000
1.20 + };
1.21 +
1.22 + float fCenterX, fCenterY;
1.23 + float fDCenterX, fDCenterY;
1.24 + float fRadius;
1.25 + float fDRadius;
1.26 + float fA;
1.27 + float fRadius2;
1.28 + float fRDR;
1.29 +
1.30 + void init(const SkPoint& center0, SkScalar rad0,
1.31 + const SkPoint& center1, SkScalar rad1);
1.32 +
1.33 + // used by setup and nextT
1.34 + float fRelX, fRelY, fIncX, fIncY;
1.35 + float fB, fDB;
1.36 +
1.37 + void setup(SkScalar fx, SkScalar fy, SkScalar dfx, SkScalar dfy);
1.38 + SkFixed nextT();
1.39 +
1.40 + static bool DontDrawT(SkFixed t) {
1.41 + return kDontDrawT == (uint32_t)t;
1.42 + }
1.43 +};
1.44 +
1.45 +
1.46 +class SkTwoPointConicalGradient : public SkGradientShaderBase {
1.47 + TwoPtRadial fRec;
1.48 + void init();
1.49 +
1.50 +public:
1.51 + SkTwoPointConicalGradient(const SkPoint& start, SkScalar startRadius,
1.52 + const SkPoint& end, SkScalar endRadius,
1.53 + const Descriptor&);
1.54 +
1.55 + virtual void shadeSpan(int x, int y, SkPMColor* dstCParam,
1.56 + int count) SK_OVERRIDE;
1.57 + virtual bool setContext(const SkBitmap& device,
1.58 + const SkPaint& paint,
1.59 + const SkMatrix& matrix) SK_OVERRIDE;
1.60 +
1.61 + virtual BitmapType asABitmap(SkBitmap* bitmap,
1.62 + SkMatrix* matrix,
1.63 + TileMode* xy) const;
1.64 + virtual SkShader::GradientType asAGradient(GradientInfo* info) const SK_OVERRIDE;
1.65 + virtual GrEffectRef* asNewEffect(GrContext* context, const SkPaint& paint) const SK_OVERRIDE;
1.66 + virtual bool isOpaque() const SK_OVERRIDE;
1.67 +
1.68 + SkScalar getCenterX1() const { return SkPoint::Distance(fCenter1, fCenter2); }
1.69 + SkScalar getStartRadius() const { return fRadius1; }
1.70 + SkScalar getDiffRadius() const { return fRadius2 - fRadius1; }
1.71 +
1.72 + SK_TO_STRING_OVERRIDE()
1.73 + SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkTwoPointConicalGradient)
1.74 +
1.75 +protected:
1.76 + SkTwoPointConicalGradient(SkReadBuffer& buffer);
1.77 + virtual void flatten(SkWriteBuffer& buffer) const SK_OVERRIDE;
1.78 +
1.79 +private:
1.80 + typedef SkGradientShaderBase INHERITED;
1.81 + const SkPoint fCenter1;
1.82 + const SkPoint fCenter2;
1.83 + const SkScalar fRadius1;
1.84 + const SkScalar fRadius2;
1.85 +};
1.86 +
1.87 +#endif
