The Tor Browser: gfx/skia/trunk/src/effects/gradients/SkTwoPointConicalGradient.h@b8a032363ba2

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

     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  */

     9  #ifndef SkTwoPointConicalGradient_DEFINED

    10  #define SkTwoPointConicalGradient_DEFINED

    12 #include "SkGradientShaderPriv.h"

    14 struct TwoPtRadial {

    15     enum {

    16         kDontDrawT  = 0x80000000

    17     };

    19     float   fCenterX, fCenterY;

    20     float   fDCenterX, fDCenterY;

    21     float   fRadius;

    22     float   fDRadius;

    23     float   fA;

    24     float   fRadius2;

    25     float   fRDR;

    27     void init(const SkPoint& center0, SkScalar rad0,

    28               const SkPoint& center1, SkScalar rad1);

    30     // used by setup and nextT

    31     float   fRelX, fRelY, fIncX, fIncY;

    32     float   fB, fDB;

    34     void setup(SkScalar fx, SkScalar fy, SkScalar dfx, SkScalar dfy);

    35     SkFixed nextT();

    37     static bool DontDrawT(SkFixed t) {

    38         return kDontDrawT == (uint32_t)t;

    39     }

    40 };

    43 class SkTwoPointConicalGradient : public SkGradientShaderBase {

    44     TwoPtRadial fRec;

    45     void init();

    47 public:

    48     SkTwoPointConicalGradient(const SkPoint& start, SkScalar startRadius,

    49                               const SkPoint& end, SkScalar endRadius,

    50                               const Descriptor&);

    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;

    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;

    65     SkScalar getCenterX1() const { return SkPoint::Distance(fCenter1, fCenter2); }

    66     SkScalar getStartRadius() const { return fRadius1; }

    67     SkScalar getDiffRadius() const { return fRadius2 - fRadius1; }

    69     SK_TO_STRING_OVERRIDE()

    70     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkTwoPointConicalGradient)

    72 protected:

    73     SkTwoPointConicalGradient(SkReadBuffer& buffer);

    74     virtual void flatten(SkWriteBuffer& buffer) const SK_OVERRIDE;

    76 private:

    77     typedef SkGradientShaderBase INHERITED;

    78     const SkPoint fCenter1;

    79     const SkPoint fCenter2;

    80     const SkScalar fRadius1;

    81     const SkScalar fRadius2;

    82 };

    84 #endif

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