9fa60daad4
Refactoring pattern: 1. guard the existing constructor(readbuffer) with the legacy build-flag 2. If you are a instancable subclass, implement CreateProc(readbuffer) to create a new instances from the buffer params (or return NULL). If you're a shader subclass 1. You must read/write the local matrix if your class accepts that in its factory/constructor, else ignore it. R=robertphillips@google.com, mtklein@google.com, senorblanco@google.com, senorblanco@chromium.org, sugoi@chromium.org Author: reed@google.com Review URL: https://codereview.chromium.org/395603002
94 lines
2.6 KiB
C++
94 lines
2.6 KiB
C++
/*
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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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static SkBlurDrawLooper* Create(SkColor color, SkScalar sigma, SkScalar dx, SkScalar dy,
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uint32_t flags = kNone_BlurFlag) {
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return SkNEW_ARGS(SkBlurDrawLooper, (color, sigma, dx, dy, flags));
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}
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virtual ~SkBlurDrawLooper();
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virtual SkDrawLooper::Context* createContext(SkCanvas*, void* storage) const SK_OVERRIDE;
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virtual size_t contextSize() const SK_OVERRIDE { return sizeof(BlurDrawLooperContext); }
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SK_TO_STRING_OVERRIDE()
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SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkBlurDrawLooper)
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protected:
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SkBlurDrawLooper(SkColor color, SkScalar sigma, SkScalar dx, SkScalar dy,
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uint32_t flags);
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#ifdef SK_SUPPORT_LEGACY_DEEPFLATTENING
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SkBlurDrawLooper(SkReadBuffer&);
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#endif
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virtual void flatten(SkWriteBuffer&) const SK_OVERRIDE;
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virtual bool asABlurShadow(BlurShadowRec*) 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, fSigma;
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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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class BlurDrawLooperContext : public SkDrawLooper::Context {
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public:
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explicit BlurDrawLooperContext(const SkBlurDrawLooper* looper);
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virtual bool next(SkCanvas* canvas, SkPaint* paint) SK_OVERRIDE;
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private:
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const SkBlurDrawLooper* fLooper;
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State fState;
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};
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void init(SkScalar sigma, SkScalar dx, SkScalar dy, SkColor color, uint32_t flags);
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void initEffects();
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typedef SkDrawLooper INHERITED;
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};
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#endif
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