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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 SkResizeImageFilter_DEFINED | |
9 #define SkResizeImageFilter_DEFINED | |
10 | |
11 #include "SkImageFilter.h" | |
12 #include "SkScalar.h" | |
13 #include "SkRect.h" | |
14 #include "SkPoint.h" | |
15 #include "SkPaint.h" | |
16 | |
17 /*! \class SkResizeImageFilter | |
18 Resampling image filter. This filter draws its source image resampled using
the given scale | |
19 values. | |
20 */ | |
21 | |
22 class SK_API SkResizeImageFilter : public SkImageFilter { | |
23 public: | |
24 virtual ~SkResizeImageFilter(); | |
25 | |
26 /** Construct a (scaling-only) resampling image filter. | |
27 * @param sx The x scale parameter to apply when resizing. | |
28 * @param sy The y scale parameter to apply when resizing. | |
29 * @param filterLevel The quality of filtering to apply when scaling. | |
30 * @param input The input image filter. If NULL, the src bitmap | |
31 * passed to filterImage() is used instead. | |
32 */ | |
33 static SkResizeImageFilter* Create(SkScalar sx, SkScalar sy, SkPaint::Filter
Level filterLevel, | |
34 SkImageFilter* input = NULL) { | |
35 return SkNEW_ARGS(SkResizeImageFilter, (sx, sy, filterLevel, input)); | |
36 } | |
37 | |
38 virtual void computeFastBounds(const SkRect&, SkRect*) const SK_OVERRIDE; | |
39 | |
40 SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkResizeImageFilter) | |
41 | |
42 protected: | |
43 SkResizeImageFilter(SkReadBuffer& buffer); | |
44 virtual void flatten(SkWriteBuffer&) const SK_OVERRIDE; | |
45 | |
46 virtual bool onFilterImage(Proxy*, const SkBitmap& src, const Context&, | |
47 SkBitmap* result, SkIPoint* loc) const SK_OVERRID
E; | |
48 virtual bool onFilterBounds(const SkIRect& src, const SkMatrix&, | |
49 SkIRect* dst) const SK_OVERRIDE; | |
50 | |
51 #ifdef SK_SUPPORT_LEGACY_PUBLICEFFECTCONSTRUCTORS | |
52 public: | |
53 #endif | |
54 SkResizeImageFilter(SkScalar sx, SkScalar sy, SkPaint::FilterLevel filterLev
el, | |
55 SkImageFilter* input = NULL); | |
56 | |
57 private: | |
58 SkScalar fSx, fSy; | |
59 SkPaint::FilterLevel fFilterLevel; | |
60 typedef SkImageFilter INHERITED; | |
61 }; | |
62 | |
63 #endif | |
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