4868e6b221
Fixed rendering of shadows under bitmaps. Added an option to SkBlurMask to produce higher quality blurs. The HQ blur option is propagated through SkBlurDrawLooper so that it can be invoked by WebKit for drawing shadows. Added a shadow rendering test to gm. Bugs fixed: 146, 150 Related Chromium bugs: 11153, 42654 Code review: http://codereview.appspot.com/4174049 git-svn-id: http://skia.googlecode.com/svn/trunk@818 2bbb7eff-a529-9590-31e7-b0007b416f81
88 lines
2.5 KiB
C++
88 lines
2.5 KiB
C++
/*
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* Copyright (C) 2008 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef SkBlurDrawLooper_DEFINED
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#define SkBlurDrawLooper_DEFINED
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#include "SkDrawLooper.h"
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#include "SkColor.h"
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class SkMaskFilter;
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class SkColorFilter;
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/** \class SkBlurDrawLooper
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This class draws a shadow of the object (possibly offset), and then draws
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the original object in its original position.
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should there be an option to just draw the shadow/blur layer? webkit?
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*/
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class SkBlurDrawLooper : public SkDrawLooper {
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public:
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enum BlurFlags {
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kNone_BlurFlag = 0x00,
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/**
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The blur layer's dx/dy/radius aren't affected by the canvas
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transform.
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*/
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kIgnoreTransform_BlurFlag = 0x01,
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kOverrideColor_BlurFlag = 0x02,
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kHighQuality_BlurFlag = 0x04,
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/** mask for all blur flags */
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kAll_BlurFlag = 0x07
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};
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SkBlurDrawLooper(SkScalar radius, SkScalar dx, SkScalar dy, SkColor color,
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uint32_t flags = kNone_BlurFlag);
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virtual ~SkBlurDrawLooper();
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// overrides from SkDrawLooper
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virtual void init(SkCanvas*, SkPaint*);
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virtual bool next();
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virtual void restore();
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static SkFlattenable* CreateProc(SkFlattenableReadBuffer& buffer) {
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return SkNEW_ARGS(SkBlurDrawLooper, (buffer));
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}
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protected:
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SkBlurDrawLooper(SkFlattenableReadBuffer&);
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// overrides from SkFlattenable
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virtual void flatten(SkFlattenableWriteBuffer& );
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virtual Factory getFactory() { return CreateProc; }
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private:
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SkCanvas* fCanvas;
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SkPaint* fPaint;
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SkMaskFilter* fBlur;
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SkColorFilter* fColorFilter;
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SkScalar fDx, fDy;
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SkColor fBlurColor;
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SkColor fSavedColor; // remember the original
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int fSaveCount;
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uint32_t fBlurFlags;
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enum State {
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kBeforeEdge,
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kAfterEdge,
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kDone
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};
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State fState;
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typedef SkDrawLooper INHERITED;
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};
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#endif
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