skia2/include/effects/SkDisplacementMapEffect.h
commit-bot@chromium.org ae761f7545 Make SkImageFilter methods const.
SkImageFilter had some non-const methods that could all be made const.
This is a first step towards making SkImageFilter immutable.

BUG=skia:2097
R=mtklein@google.com, reed@google.com, robertphillips@google.com

Author: dominikg@chromium.org

Review URL: https://codereview.chromium.org/148883011

git-svn-id: http://skia.googlecode.com/svn/trunk@13330 2bbb7eff-a529-9590-31e7-b0007b416f81
2014-02-05 22:32:02 +00:00

65 lines
2.2 KiB
C++

/*
* Copyright 2013 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkDisplacementMapEffect_DEFINED
#define SkDisplacementMapEffect_DEFINED
#include "SkImageFilter.h"
#include "SkBitmap.h"
class SK_API SkDisplacementMapEffect : public SkImageFilter {
public:
enum ChannelSelectorType {
kUnknown_ChannelSelectorType,
kR_ChannelSelectorType,
kG_ChannelSelectorType,
kB_ChannelSelectorType,
kA_ChannelSelectorType,
kKeyBits = 3 // Max value is 4, so 3 bits are required at most
};
SkDisplacementMapEffect(ChannelSelectorType xChannelSelector,
ChannelSelectorType yChannelSelector,
SkScalar scale, SkImageFilter* displacement,
SkImageFilter* color = NULL,
const CropRect* cropRect = NULL);
~SkDisplacementMapEffect();
SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkDisplacementMapEffect)
virtual bool onFilterImage(Proxy* proxy,
const SkBitmap& src,
const SkMatrix& ctm,
SkBitmap* dst,
SkIPoint* offset) const SK_OVERRIDE;
virtual void computeFastBounds(const SkRect& src, SkRect* dst) const SK_OVERRIDE;
virtual bool onFilterBounds(const SkIRect& src, const SkMatrix&,
SkIRect* dst) const SK_OVERRIDE;
#if SK_SUPPORT_GPU
virtual bool canFilterImageGPU() const SK_OVERRIDE { return true; }
virtual bool filterImageGPU(Proxy* proxy, const SkBitmap& src, const SkMatrix& ctm,
SkBitmap* result, SkIPoint* offset) const SK_OVERRIDE;
#endif
protected:
explicit SkDisplacementMapEffect(SkReadBuffer& buffer);
virtual void flatten(SkWriteBuffer&) const SK_OVERRIDE;
private:
ChannelSelectorType fXChannelSelector;
ChannelSelectorType fYChannelSelector;
SkScalar fScale;
typedef SkImageFilter INHERITED;
const SkImageFilter* getDisplacementInput() const { return getInput(0); }
const SkImageFilter* getColorInput() const { return getInput(1); }
};
#endif