7b320703d4
This patch adds the parameter to the filterImageGPU() signature, plumbs through the code on the GPU side, and implements support for it in SkXfermodeImageFilter for both raster and GPU. Of the remaining filters with GPU implementations, Blur, Morphology, Bicubic and Displacement work fine; they're commutative wrt offset and can simply pass it up the chain. Blend is not, but will be removed shortly anyway (has been replaced with SkXfermodeImageFilter in Blink). R=reed@google.com, bsalomon@google.com Author: senorblanco@chromium.org Review URL: https://chromiumcodereview.appspot.com/15995026 git-svn-id: http://skia.googlecode.com/svn/trunk@9977 2bbb7eff-a529-9590-31e7-b0007b416f81
59 lines
1.9 KiB
C++
59 lines
1.9 KiB
C++
/*
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* Copyright 2013 Google Inc.
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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 SkDisplacementMapEffect_DEFINED
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#define SkDisplacementMapEffect_DEFINED
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#include "SkImageFilter.h"
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#include "SkBitmap.h"
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class SK_API SkDisplacementMapEffect : public SkImageFilter {
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public:
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enum ChannelSelectorType {
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kUnknown_ChannelSelectorType,
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kR_ChannelSelectorType,
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kG_ChannelSelectorType,
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kB_ChannelSelectorType,
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kA_ChannelSelectorType,
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kKeyBits = 3 // Max value is 4, so 3 bits are required at most
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};
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SkDisplacementMapEffect(ChannelSelectorType xChannelSelector,
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ChannelSelectorType yChannelSelector,
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SkScalar scale, SkImageFilter* displacement,
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SkImageFilter* color = NULL);
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~SkDisplacementMapEffect();
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SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkDisplacementMapEffect)
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virtual bool onFilterImage(Proxy* proxy,
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const SkBitmap& src,
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const SkMatrix& ctm,
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SkBitmap* dst,
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SkIPoint* offset) SK_OVERRIDE;
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#if SK_SUPPORT_GPU
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virtual bool canFilterImageGPU() const SK_OVERRIDE { return true; }
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virtual bool filterImageGPU(Proxy* proxy, const SkBitmap& src, SkBitmap* result,
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SkIPoint* offset) SK_OVERRIDE;
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#endif
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protected:
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explicit SkDisplacementMapEffect(SkFlattenableReadBuffer& buffer);
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virtual void flatten(SkFlattenableWriteBuffer&) const SK_OVERRIDE;
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private:
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ChannelSelectorType fXChannelSelector;
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ChannelSelectorType fYChannelSelector;
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SkScalar fScale;
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typedef SkImageFilter INHERITED;
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SkImageFilter* getDisplacementInput() { return getInput(0); }
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SkImageFilter* getColorInput() { return getInput(1); }
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};
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#endif
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