f160ad4d76
Android is the only user of this looper. They never pass any flags. BUG=skia: Change-Id: I87b02ef7bc0ed94bca82637d60adddf34575a3e6 Reviewed-on: https://skia-review.googlesource.com/10057 Commit-Queue: Matt Sarett <msarett@google.com> Reviewed-by: Mike Reed <reed@google.com>
71 lines
1.8 KiB
C++
71 lines
1.8 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 SkArenaAlloc;
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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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static sk_sp<SkDrawLooper> Make(SkColor color, SkScalar sigma, SkScalar dx, SkScalar dy) {
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return sk_sp<SkDrawLooper>(new SkBlurDrawLooper(color, sigma, dx, dy));
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}
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SkDrawLooper::Context* makeContext(SkCanvas*, SkArenaAlloc*) const override;
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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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void flatten(SkWriteBuffer&) const override;
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bool asABlurShadow(BlurShadowRec*) const override;
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private:
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sk_sp<SkMaskFilter> fBlur;
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SkScalar fDx, fDy, fSigma;
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SkColor fBlurColor;
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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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bool next(SkCanvas* canvas, SkPaint* paint) 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);
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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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