SkBitmapSource.h revision bd0be25074e53a6d1abc284562568c9745191984 
1/*
2 * Copyright 2012 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 SkBitmapSource_DEFINED
9#define SkBitmapSource_DEFINED
10
11#include "SkImageFilter.h"
12#include "SkBitmap.h"
13
14class SK_API SkBitmapSource : public SkImageFilter {
15public:
16    static SkBitmapSource* Create(const SkBitmap& bitmap) {
17        return SkNEW_ARGS(SkBitmapSource, (bitmap));
18    }
19    static SkBitmapSource* Create(const SkBitmap& bitmap, const SkRect& srcRect,
20                                  const SkRect& dstRect) {
21        return SkNEW_ARGS(SkBitmapSource, (bitmap, srcRect, dstRect));
22    }
23    virtual void computeFastBounds(const SkRect& src, SkRect* dst) const SK_OVERRIDE;
24
25    SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkBitmapSource)
26
27protected:
28    explicit SkBitmapSource(const SkBitmap& bitmap);
29    SkBitmapSource(const SkBitmap& bitmap, const SkRect& srcRect, const SkRect& dstRect);
30    explicit SkBitmapSource(SkReadBuffer& buffer);
31    virtual void flatten(SkWriteBuffer&) const SK_OVERRIDE;
32
33    virtual bool onFilterImage(Proxy*, const SkBitmap& src, const Context&,
34                               SkBitmap* result, SkIPoint* offset) const SK_OVERRIDE;
35    virtual bool onFilterBounds(const SkIRect& src, const SkMatrix& ctm, SkIRect* dst) const SK_OVERRIDE;
36
37private:
38    SkBitmap fBitmap;
39    SkRect   fSrcRect, fDstRect;
40    typedef SkImageFilter INHERITED;
41};
42
43#endif
44