54924243c1
The following changes were made by this CL: 1. Make flatten() a protected method as callers should use SkFlattenableWriteBuffer to flatten an object 2. Make flatten a const method (including subclasses) 3. Mark subclass implementation of flatten with SK_OVERRIDE 4. Ensure overridden flatten impls call their parent 5. Remove no-op implementations of flatten from subclasses Additionally, if necessary the unflattening constructor was also moved to the protected section of the subclasses header if it was not already there. git-svn-id: http://skia.googlecode.com/svn/trunk@3540 2bbb7eff-a529-9590-31e7-b0007b416f81
71 lines
1.8 KiB
C++
71 lines
1.8 KiB
C++
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/*
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* Copyright 2008 The Android Open Source Project
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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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 SK_API 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*);
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virtual bool next(SkCanvas*, SkPaint* paint);
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SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkBlurDrawLooper)
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protected:
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SkBlurDrawLooper(SkFlattenableReadBuffer&);
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virtual void flatten(SkFlattenableWriteBuffer&) const SK_OVERRIDE;
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private:
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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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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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