SkPictureImageFilter.h revision 910702b564048d77e36a68b0f8dda7cc48a8fcff 
1/*
2 * Copyright 2013 The Android Open Source Project
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
7
8#ifndef SkPictureImageFilter_DEFINED
9#define SkPictureImageFilter_DEFINED
10
11#include "SkImageFilter.h"
12#include "SkPicture.h"
13
14class SK_API SkPictureImageFilter : public SkImageFilter {
15public:
16    /**
17     *  Refs the passed-in picture.
18     */
19    static SkPictureImageFilter* Create(SkPicture* picture) {
20        return SkNEW_ARGS(SkPictureImageFilter, (picture));
21    }
22
23    /**
24     *  Refs the passed-in picture. cropRect can be used to crop or expand the destination rect when
25     *  the picture is drawn. (No scaling is implied by the dest rect; only the CTM is applied.)
26     */
27    static SkPictureImageFilter* Create(SkPicture* picture, const SkRect& cropRect) {
28        return SkNEW_ARGS(SkPictureImageFilter, (picture, cropRect));
29    }
30
31    SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkPictureImageFilter)
32
33protected:
34    explicit SkPictureImageFilter(SkPicture* picture);
35    SkPictureImageFilter(SkPicture* picture, const SkRect& cropRect);
36    virtual ~SkPictureImageFilter();
37    /*  Constructs an SkPictureImageFilter object from an SkReadBuffer.
38     *  Note: If the SkPictureImageFilter object construction requires bitmap
39     *  decoding, the decoder must be set on the SkReadBuffer parameter by calling
40     *  SkReadBuffer::setBitmapDecoder() before calling this constructor.
41     *  @param SkReadBuffer Serialized picture data.
42     */
43    explicit SkPictureImageFilter(SkReadBuffer&);
44    virtual void flatten(SkWriteBuffer&) const SK_OVERRIDE;
45    virtual bool onFilterImage(Proxy*, const SkBitmap& src, const Context&,
46                               SkBitmap* result, SkIPoint* offset) const SK_OVERRIDE;
47    virtual bool onFilterBounds(const SkIRect& src, const SkMatrix&,
48                                SkIRect* dst) const SK_OVERRIDE;
49
50private:
51    SkPicture* fPicture;
52    SkRect     fCropRect;
53    typedef SkImageFilter INHERITED;
54};
55
56#endif
57