The Tor Browser: gfx/skia/trunk/include/effects/SkDisplacementMapEffect.h@6474c204b198

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

     1 /*

     2  * Copyright 2013 Google Inc.

     3  *

     4  * Use of this source code is governed by a BSD-style license that can be

     5  * found in the LICENSE file.

     6  */

     8 #ifndef SkDisplacementMapEffect_DEFINED

     9 #define SkDisplacementMapEffect_DEFINED

    11 #include "SkImageFilter.h"

    12 #include "SkBitmap.h"

    14 class SK_API SkDisplacementMapEffect : public SkImageFilter {

    15 public:

    16     enum ChannelSelectorType {

    17         kUnknown_ChannelSelectorType,

    18         kR_ChannelSelectorType,

    19         kG_ChannelSelectorType,

    20         kB_ChannelSelectorType,

    21         kA_ChannelSelectorType

    22     };

    24     ~SkDisplacementMapEffect();

    26     static SkDisplacementMapEffect* Create(ChannelSelectorType xChannelSelector,

    27                                            ChannelSelectorType yChannelSelector,

    28                                            SkScalar scale, SkImageFilter* displacement,

    29                                            SkImageFilter* color = NULL,

    30                                            const CropRect* cropRect = NULL) {

    31         return SkNEW_ARGS(SkDisplacementMapEffect, (xChannelSelector, yChannelSelector, scale,

    32                                                     displacement, color, cropRect));

    33     }

    35     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkDisplacementMapEffect)

    37     virtual bool onFilterImage(Proxy* proxy,

    38                                const SkBitmap& src,

    39                                const Context& ctx,

    40                                SkBitmap* dst,

    41                                SkIPoint* offset) const SK_OVERRIDE;

    42     virtual void computeFastBounds(const SkRect& src, SkRect* dst) const SK_OVERRIDE;

    44     virtual bool onFilterBounds(const SkIRect& src, const SkMatrix&,

    45                                 SkIRect* dst) const SK_OVERRIDE;

    47 #if SK_SUPPORT_GPU

    48     virtual bool canFilterImageGPU() const SK_OVERRIDE { return true; }

    49     virtual bool filterImageGPU(Proxy* proxy, const SkBitmap& src, const Context& ctx,

    50                                 SkBitmap* result, SkIPoint* offset) const SK_OVERRIDE;

    51 #endif

    53 protected:

    54     explicit SkDisplacementMapEffect(SkReadBuffer& buffer);

    55     virtual void flatten(SkWriteBuffer&) const SK_OVERRIDE;

    57 #ifdef SK_SUPPORT_LEGACY_PUBLICEFFECTCONSTRUCTORS

    58 public:

    59 #endif

    60     SkDisplacementMapEffect(ChannelSelectorType xChannelSelector,

    61                             ChannelSelectorType yChannelSelector,

    62                             SkScalar scale, SkImageFilter* displacement,

    63                             SkImageFilter* color = NULL,

    64                             const CropRect* cropRect = NULL);

    66 private:

    67     ChannelSelectorType fXChannelSelector;

    68     ChannelSelectorType fYChannelSelector;

    69     SkScalar fScale;

    70     typedef SkImageFilter INHERITED;

    71     const SkImageFilter* getDisplacementInput() const { return getInput(0); }

    72     const SkImageFilter* getColorInput() const { return getInput(1); }

    73 };

    75 #endif

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