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/*
* Copyright 2013 The Android Open Source Project
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkPictureImageFilter_DEFINED
#define SkPictureImageFilter_DEFINED
#include "SkImageFilter.h"
#include "SkPicture.h"
class SK_API SkPictureImageFilter : public SkImageFilter {
public:
/**
* Refs the passed-in picture.
*/
static sk_sp<SkImageFilter> Make(sk_sp<SkPicture> picture);
/**
* Refs the passed-in picture. cropRect can be used to crop or expand the destination rect when
* the picture is drawn. (No scaling is implied by the dest rect; only the CTM is applied.)
*/
static sk_sp<SkImageFilter> Make(sk_sp<SkPicture> picture, const SkRect& cropRect);
/**
* Refs the passed-in picture. The picture is rasterized at a resolution that matches the
* local coordinate space. If the picture needs to be resampled for drawing it into the
* destination canvas, bilinear filtering will be used. cropRect can be used to crop or
* expand the destination rect when the picture is drawn. (No scaling is implied by the
* dest rect; only the CTM is applied.)
*/
static sk_sp<SkImageFilter> MakeForLocalSpace(sk_sp<SkPicture> picture,
const SkRect& cropRect,
SkFilterQuality filterQuality);
SK_TO_STRING_OVERRIDE()
SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkPictureImageFilter)
protected:
enum PictureResolution {
kDeviceSpace_PictureResolution,
kLocalSpace_PictureResolution
};
/* Constructs an SkPictureImageFilter object from an SkReadBuffer.
* Note: If the SkPictureImageFilter object construction requires bitmap
* decoding, the decoder must be set on the SkReadBuffer parameter by calling
* SkReadBuffer::setBitmapDecoder() before calling this constructor.
* @param SkReadBuffer Serialized picture data.
*/
void flatten(SkWriteBuffer&) const override;
sk_sp<SkSpecialImage> onFilterImage(SkSpecialImage* source, const Context&,
SkIPoint* offset) const override;
private:
explicit SkPictureImageFilter(sk_sp<SkPicture> picture);
SkPictureImageFilter(sk_sp<SkPicture> picture, const SkRect& cropRect,
PictureResolution, SkFilterQuality);
void drawPictureAtDeviceResolution(SkCanvas* canvas,
const SkIRect& deviceBounds,
const Context&) const;
void drawPictureAtLocalResolution(SkSpecialImage* source,
SkCanvas*,
const SkIRect& deviceBounds,
const Context&) const;
sk_sp<SkPicture> fPicture;
SkRect fCropRect;
PictureResolution fPictureResolution;
SkFilterQuality fFilterQuality;
typedef SkImageFilter INHERITED;
};
#endif
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