The Tor Browser: gfx/skia/trunk/include/gpu/GrPaint.h@129ffea94266 (annotated)

gfx/skia/trunk/include/gpu/GrPaint.h@129ffea94266 (annotated)

gfx/skia/trunk/include/gpu/GrPaint.h

Sat, 03 Jan 2015 20:18:00 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Sat, 03 Jan 2015 20:18:00 +0100
branch: TOR_BUG_3246
changeset 7: 129ffea94266
permissions: -rw-r--r--

Conditionally enable double key logic according to:
private browsing mode or privacy.thirdparty.isolate preference and
implement in GetCookieStringCommon and FindCookie where it counts...
With some reservations of how to convince FindCookie users to test
condition and pass a nullptr when disabling double key logic.

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #ifndef GrPaint_DEFINED
 #define GrPaint_DEFINED
 #include "GrColor.h"
 #include "GrEffectStage.h"
 #include "SkXfermode.h"
 /**
  * The paint describes how color and coverage are computed at each pixel by GrContext draw
  * functions and the how color is blended with the destination pixel.
  *
  * The paint allows installation of custom color and coverage stages. New types of stages are
  * created by subclassing GrEffect.
  *
  * The primitive color computation starts with the color specified by setColor(). This color is the
  * input to the first color stage. Each color stage feeds its output to the next color stage. The
  * final color stage's output color is input to the color filter specified by
  * setXfermodeColorFilter which produces the final source color, S.
  *
  * Fractional pixel coverage follows a similar flow. The coverage is initially the value specified
  * by setCoverage(). This is input to the first coverage stage. Coverage stages are chained
  * together in the same manner as color stages. The output of the last stage is modulated by any
  * fractional coverage produced by anti-aliasing. This last step produces the final coverage, C.
  *
  * setBlendFunc() specifies blending coefficients for S (described above) and D, the initial value
  * of the destination pixel, labeled Bs and Bd respectively. The final value of the destination
  * pixel is then D' = (1-C)*D + C*(Bd*D + Bs*S).
  *
  * Note that the coverage is applied after the blend. This is why they are computed as distinct
  * values.
  *
  * TODO: Encapsulate setXfermodeColorFilter in a GrEffect and remove from GrPaint.
  */
 class GrPaint {
 public:
     GrPaint() { this->reset(); }
     GrPaint(const GrPaint& paint) { *this = paint; }
     ~GrPaint() {}
     /**
      * Sets the blending coefficients to use to blend the final primitive color with the
      * destination color. Defaults to kOne for src and kZero for dst (i.e. src mode).
      */
     void setBlendFunc(GrBlendCoeff srcCoeff, GrBlendCoeff dstCoeff) {
         fSrcBlendCoeff = srcCoeff;
         fDstBlendCoeff = dstCoeff;
     }
     GrBlendCoeff getSrcBlendCoeff() const { return fSrcBlendCoeff; }
     GrBlendCoeff getDstBlendCoeff() const { return fDstBlendCoeff; }
     /**
      * The initial color of the drawn primitive. Defaults to solid white.
      */
     void setColor(GrColor color) { fColor = color; }
     GrColor getColor() const { return fColor; }
     /**
      * Applies fractional coverage to the entire drawn primitive. Defaults to 0xff.
      */
     void setCoverage(uint8_t coverage) { fCoverage = coverage; }
     uint8_t getCoverage() const { return fCoverage; }
     /**
      * Should primitives be anti-aliased or not. Defaults to false.
      */
     void setAntiAlias(bool aa) { fAntiAlias = aa; }
     bool isAntiAlias() const { return fAntiAlias; }
     /**
      * Should dithering be applied. Defaults to false.
      */
     void setDither(bool dither) { fDither = dither; }
     bool isDither() const { return fDither; }
     /**
      * Appends an additional color effect to the color computation.
      */
     const GrEffectRef* addColorEffect(const GrEffectRef* effect, int attr0 = -1, int attr1 = -1) {
         SkASSERT(NULL != effect);
         if (!(*effect)->willUseInputColor()) {
             fColorStages.reset();
         }
         SkNEW_APPEND_TO_TARRAY(&fColorStages, GrEffectStage, (effect, attr0, attr1));
         return effect;
     }
     /**
      * Appends an additional coverage effect to the coverage computation.
      */
     const GrEffectRef* addCoverageEffect(const GrEffectRef* effect, int attr0 = -1, int attr1 = -1) {
         SkASSERT(NULL != effect);
         if (!(*effect)->willUseInputColor()) {
             fCoverageStages.reset();
         }
         SkNEW_APPEND_TO_TARRAY(&fCoverageStages, GrEffectStage, (effect, attr0, attr1));
         return effect;
     }
     /**
      * Helpers for adding color or coverage effects that sample a texture. The matrix is applied
      * to the src space position to compute texture coordinates.
      */
     void addColorTextureEffect(GrTexture* texture, const SkMatrix& matrix);
     void addCoverageTextureEffect(GrTexture* texture, const SkMatrix& matrix);
     void addColorTextureEffect(GrTexture* texture,
                                const SkMatrix& matrix,
                                const GrTextureParams& params);
     void addCoverageTextureEffect(GrTexture* texture,
                                   const SkMatrix& matrix,
                                   const GrTextureParams& params);
     int numColorStages() const { return fColorStages.count(); }
     int numCoverageStages() const { return fCoverageStages.count(); }
     int numTotalStages() const { return this->numColorStages() + this->numCoverageStages(); }
     const GrEffectStage& getColorStage(int s) const { return fColorStages[s]; }
     const GrEffectStage& getCoverageStage(int s) const { return fCoverageStages[s]; }
     GrPaint& operator=(const GrPaint& paint) {
         fSrcBlendCoeff = paint.fSrcBlendCoeff;
         fDstBlendCoeff = paint.fDstBlendCoeff;
         fAntiAlias = paint.fAntiAlias;
         fDither = paint.fDither;
         fColor = paint.fColor;
         fCoverage = paint.fCoverage;
         fColorStages = paint.fColorStages;
         fCoverageStages = paint.fCoverageStages;
         return *this;
     }
     /**
      * Resets the paint to the defaults.
      */
     void reset() {
         this->resetBlend();
         this->resetOptions();
         this->resetColor();
         this->resetCoverage();
         this->resetStages();
     }
     /**
      * Determines whether the drawing with this paint is opaque with respect to both color blending
      * and fractional coverage. It does not consider whether AA has been enabled on the paint or
      * not. Depending upon whether multisampling or coverage-based AA is in use, AA may make the
      * result only apply to the interior of primitives.
      *
      */
     bool isOpaque() const;
     /**
      * Returns true if isOpaque would return true and the paint represents a solid constant color
      * draw. If the result is true, constantColor will be updated to contain the constant color.
      */
     bool isOpaqueAndConstantColor(GrColor* constantColor) const;
 private:
     /**
      * Helper for isOpaque and isOpaqueAndConstantColor.
      */
     bool getOpaqueAndKnownColor(GrColor* solidColor, uint32_t* solidColorKnownComponents) const;
     /**
      * Called when the source coord system from which geometry is rendered changes. It ensures that
      * the local coordinates seen by effects remains unchanged. oldToNew gives the transformation
      * from the previous coord system to the new coord system.
      */
     void localCoordChange(const SkMatrix& oldToNew) {
         for (int i = 0; i < fColorStages.count(); ++i) {
             fColorStages[i].localCoordChange(oldToNew);
         }
         for (int i = 0; i < fCoverageStages.count(); ++i) {
             fCoverageStages[i].localCoordChange(oldToNew);
         }
     }
     bool localCoordChangeInverse(const SkMatrix& newToOld) {
         SkMatrix oldToNew;
         bool computed = false;
         for (int i = 0; i < fColorStages.count(); ++i) {
             if (!computed && !newToOld.invert(&oldToNew)) {
                 return false;
             } else {
                 computed = true;
             }
             fColorStages[i].localCoordChange(oldToNew);
         }
         for (int i = 0; i < fCoverageStages.count(); ++i) {
             if (!computed && !newToOld.invert(&oldToNew)) {
                 return false;
             } else {
                 computed = true;
             }
             fCoverageStages[i].localCoordChange(oldToNew);
         }
         return true;
     }
     friend class GrContext; // To access above two functions
     SkSTArray<4, GrEffectStage> fColorStages;
     SkSTArray<2, GrEffectStage> fCoverageStages;
     GrBlendCoeff                fSrcBlendCoeff;
     GrBlendCoeff                fDstBlendCoeff;
     bool                        fAntiAlias;
     bool                        fDither;
     GrColor                     fColor;
     uint8_t                     fCoverage;
     void resetBlend() {
         fSrcBlendCoeff = kOne_GrBlendCoeff;
         fDstBlendCoeff = kZero_GrBlendCoeff;
     }
     void resetOptions() {
         fAntiAlias = false;
         fDither = false;
     }
     void resetColor() {
         fColor = GrColorPackRGBA(0xff, 0xff, 0xff, 0xff);
     }
     void resetCoverage() {
         fCoverage = 0xff;
     }
     void resetStages() {
         fColorStages.reset();
         fCoverageStages.reset();
     }
 };
 #endif

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gfx/skia/trunk/include/gpu/GrPaint.h@129ffea94266 (annotated)

gfx/skia/trunk/include/gpu/GrPaint.h