The Tor Browser: gfx/skia/trunk/include/utils/SkNoSaveLayerCanvas.h@6474c204b198

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

     1 /*

     2  * Copyright 2014 Google Inc.

     3  *

     4  * Use of this source code is governed by a BSD-style license that can be

     5  * found in the LICENSE file.

     6  */

     8 #ifndef SkNoSaveLayerCanvas_DEFINED

     9 #define SkNoSaveLayerCanvas_DEFINED

    11 #include "SkCanvas.h"

    12 #include "SkRRect.h"

    14 // The NoSaveLayerCanvas is used to play back SkPictures when the saveLayer

    15 // functionality isn't required (e.g., during analysis of the draw calls).

    16 // It also simplifies the clipping calls to only use rectangles.

    17 class SK_API SkNoSaveLayerCanvas : public SkCanvas {

    18 public:

    19     SkNoSaveLayerCanvas(SkBaseDevice* device) : INHERITED(device) {}

    21 protected:

    22     virtual SaveLayerStrategy willSaveLayer(const SkRect* bounds, const SkPaint* paint,

    23                                             SaveFlags flags) SK_OVERRIDE {

    24         this->INHERITED::willSaveLayer(bounds, paint, flags);

    25         return kNoLayer_SaveLayerStrategy;

    26     }

    28     // disable aa for speed

    29     virtual void onClipRect(const SkRect& rect, SkRegion::Op op, ClipEdgeStyle) SK_OVERRIDE {

    30         this->INHERITED::onClipRect(rect, op, kHard_ClipEdgeStyle);

    31     }

    33     // for speed, just respect the bounds, and disable AA. May give us a few

    34     // false positives and negatives.

    35     virtual void onClipPath(const SkPath& path, SkRegion::Op op, ClipEdgeStyle) SK_OVERRIDE {

    36         this->updateClipConservativelyUsingBounds(path.getBounds(), op,

    37                                                   path.isInverseFillType());

    38     }

    39     virtual void onClipRRect(const SkRRect& rrect, SkRegion::Op op, ClipEdgeStyle) SK_OVERRIDE {

    40         this->updateClipConservativelyUsingBounds(rrect.getBounds(), op, false);

    41     }

    43 private:

    44     typedef SkCanvas INHERITED;

    45 };

    47 #endif // SkNoSaveLayerCanvas_DEFINED

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