OLD | NEW |
1 /* | 1 /* |
2 * Copyright 2011 Google Inc. | 2 * Copyright 2011 Google Inc. |
3 * | 3 * |
4 * Use of this source code is governed by a BSD-style license that can be | 4 * Use of this source code is governed by a BSD-style license that can be |
5 * found in the LICENSE file. | 5 * found in the LICENSE file. |
6 */ | 6 */ |
7 | 7 |
8 #ifndef SkImageFilter_DEFINED | 8 #ifndef SkImageFilter_DEFINED |
9 #define SkImageFilter_DEFINED | 9 #define SkImageFilter_DEFINED |
10 | 10 |
(...skipping 14 matching lines...) Expand all Loading... |
25 | 25 |
26 /** | 26 /** |
27 * Base class for image filters. If one is installed in the paint, then | 27 * Base class for image filters. If one is installed in the paint, then |
28 * all drawing occurs as usual, but it is as if the drawing happened into an | 28 * all drawing occurs as usual, but it is as if the drawing happened into an |
29 * offscreen (before the xfermode is applied). This offscreen bitmap will | 29 * offscreen (before the xfermode is applied). This offscreen bitmap will |
30 * then be handed to the imagefilter, who in turn creates a new bitmap which | 30 * then be handed to the imagefilter, who in turn creates a new bitmap which |
31 * is what will finally be drawn to the device (using the original xfermode). | 31 * is what will finally be drawn to the device (using the original xfermode). |
32 */ | 32 */ |
33 class SK_API SkImageFilter : public SkFlattenable { | 33 class SK_API SkImageFilter : public SkFlattenable { |
34 public: | 34 public: |
35 class CropRect { | |
36 public: | |
37 enum CropEdge { | |
38 kHasLeft_CropEdge = 0x01, | |
39 kHasTop_CropEdge = 0x02, | |
40 kHasRight_CropEdge = 0x04, | |
41 kHasBottom_CropEdge = 0x08, | |
42 kHasAll_CropEdge = 0x0F, | |
43 }; | |
44 CropRect() {} | |
45 explicit CropRect(const SkRect& rect, uint32_t flags = kHasAll_CropEdge)
: fRect(rect), fFlags(flags) {} | |
46 uint32_t flags() const { return fFlags; } | |
47 const SkRect& rect() const { return fRect; } | |
48 private: | |
49 SkRect fRect; | |
50 uint32_t fFlags; | |
51 }; | |
52 | |
53 // This cache maps from (filter's unique ID + CTM + clipBounds + src bitmap
generation ID) to | 35 // This cache maps from (filter's unique ID + CTM + clipBounds + src bitmap
generation ID) to |
54 // (result, offset). | 36 // (result, offset). |
55 class Cache : public SkRefCnt { | 37 class Cache : public SkRefCnt { |
56 public: | 38 public: |
57 struct Key; | 39 struct Key; |
58 virtual ~Cache() {} | 40 virtual ~Cache() {} |
59 static Cache* Create(size_t maxBytes); | 41 static Cache* Create(size_t maxBytes); |
60 static Cache* Get(); | 42 static Cache* Get(); |
61 virtual bool get(const Key& key, SkBitmap* result, SkIPoint* offset) con
st = 0; | 43 virtual bool get(const Key& key, SkBitmap* result, SkIPoint* offset) con
st = 0; |
62 virtual void set(const Key& key, const SkBitmap& result, const SkIPoint&
offset) = 0; | 44 virtual void set(const Key& key, const SkBitmap& result, const SkIPoint&
offset) = 0; |
63 virtual void purge() {} | 45 virtual void purge() {} |
64 }; | 46 }; |
65 | 47 |
66 class Context { | 48 class Context { |
67 public: | 49 public: |
68 Context(const SkMatrix& ctm, const SkIRect& clipBounds, Cache* cache) : | 50 Context(const SkMatrix& ctm, const SkIRect& clipBounds, Cache* cache) : |
69 fCTM(ctm), fClipBounds(clipBounds), fCache(cache) { | 51 fCTM(ctm), fClipBounds(clipBounds), fCache(cache) { |
70 } | 52 } |
71 const SkMatrix& ctm() const { return fCTM; } | 53 const SkMatrix& ctm() const { return fCTM; } |
72 const SkIRect& clipBounds() const { return fClipBounds; } | 54 const SkIRect& clipBounds() const { return fClipBounds; } |
73 Cache* cache() const { return fCache; } | 55 Cache* cache() const { return fCache; } |
74 private: | 56 private: |
75 SkMatrix fCTM; | 57 SkMatrix fCTM; |
76 SkIRect fClipBounds; | 58 SkIRect fClipBounds; |
77 Cache* fCache; | 59 Cache* fCache; |
78 }; | 60 }; |
79 | 61 |
| 62 class CropRect { |
| 63 public: |
| 64 enum CropEdge { |
| 65 kHasLeft_CropEdge = 0x01, |
| 66 kHasTop_CropEdge = 0x02, |
| 67 kHasRight_CropEdge = 0x04, |
| 68 kHasBottom_CropEdge = 0x08, |
| 69 kHasAll_CropEdge = 0x0F, |
| 70 }; |
| 71 CropRect() {} |
| 72 explicit CropRect(const SkRect& rect, uint32_t flags = kHasAll_CropEdge) |
| 73 : fRect(rect), fFlags(flags) {} |
| 74 uint32_t flags() const { return fFlags; } |
| 75 const SkRect& rect() const { return fRect; } |
| 76 #ifndef SK_IGNORE_TO_STRING |
| 77 void toString(SkString* str) const; |
| 78 #endif |
| 79 |
| 80 /** |
| 81 * Apply this cropRect to the imageBounds. If a given edge of the cropR
ect is not |
| 82 * set, then the corresponding edge from imageBounds will be used. |
| 83 * |
| 84 * Note: imageBounds is in "device" space, as the output cropped rectan
gle will be, |
| 85 * so the context's CTM is ignore for those. It is only applied the cro
prect's bounds. |
| 86 * |
| 87 * The resulting rect will be intersected with the context's clip. If t
hat intersection is |
| 88 * empty, then this returns false and cropped is unmodified. |
| 89 */ |
| 90 bool applyTo(const SkIRect& imageBounds, const Context&, SkIRect* croppe
d) const; |
| 91 |
| 92 private: |
| 93 SkRect fRect; |
| 94 uint32_t fFlags; |
| 95 }; |
| 96 |
80 class Proxy { | 97 class Proxy { |
81 public: | 98 public: |
82 Proxy(SkBaseDevice* device) : fDevice(device) { } | 99 Proxy(SkBaseDevice* device) : fDevice(device) { } |
83 | 100 |
84 SkBaseDevice* createDevice(int width, int height); | 101 SkBaseDevice* createDevice(int width, int height); |
85 | 102 |
86 // Returns true if the proxy handled the filter itself. If this returns | 103 // Returns true if the proxy handled the filter itself. If this returns |
87 // false then the filter's code will be called. | 104 // false then the filter's code will be called. |
88 bool filterImage(const SkImageFilter*, const SkBitmap& src, const SkImag
eFilter::Context&, | 105 bool filterImage(const SkImageFilter*, const SkBitmap& src, const SkImag
eFilter::Context&, |
89 SkBitmap* result, SkIPoint* offset); | 106 SkBitmap* result, SkIPoint* offset); |
(...skipping 85 matching lines...) Expand 10 before | Expand all | Expand 10 after Loading... |
175 * connected. The indices used are filter-specific. | 192 * connected. The indices used are filter-specific. |
176 */ | 193 */ |
177 SkImageFilter* getInput(int i) const { | 194 SkImageFilter* getInput(int i) const { |
178 SkASSERT(i < fInputCount); | 195 SkASSERT(i < fInputCount); |
179 return fInputs[i]; | 196 return fInputs[i]; |
180 } | 197 } |
181 | 198 |
182 /** | 199 /** |
183 * Returns whether any edges of the crop rect have been set. The crop | 200 * Returns whether any edges of the crop rect have been set. The crop |
184 * rect is set at construction time, and determines which pixels from the | 201 * rect is set at construction time, and determines which pixels from the |
185 * input image will be processed. The size of the crop rect should be | 202 * input image will be processed, and which pixels in the output image will
be allowed. |
| 203 * The size of the crop rect should be |
186 * used as the size of the destination image. The origin of this rect | 204 * used as the size of the destination image. The origin of this rect |
187 * should be used to offset access to the input images, and should also | 205 * should be used to offset access to the input images, and should also |
188 * be added to the "offset" parameter in onFilterImage and | 206 * be added to the "offset" parameter in onFilterImage and |
189 * filterImageGPU(). (The latter ensures that the resulting buffer is | 207 * filterImageGPU(). (The latter ensures that the resulting buffer is |
190 * drawn in the correct location.) | 208 * drawn in the correct location.) |
191 */ | 209 */ |
192 bool cropRectIsSet() const { return fCropRect.flags() != 0x0; } | 210 bool cropRectIsSet() const { return fCropRect.flags() != 0x0; } |
193 | 211 |
194 CropRect getCropRect() const { return fCropRect; } | 212 CropRect getCropRect() const { return fCropRect; } |
195 | 213 |
(...skipping 167 matching lines...) Expand 10 before | Expand all | Expand 10 after Loading... |
363 */ | 381 */ |
364 #define SK_IMAGEFILTER_UNFLATTEN_COMMON(localVar, expectedCount) \ | 382 #define SK_IMAGEFILTER_UNFLATTEN_COMMON(localVar, expectedCount) \ |
365 Common localVar; \ | 383 Common localVar; \ |
366 do { \ | 384 do { \ |
367 if (!localVar.unflatten(buffer, expectedCount)) { \ | 385 if (!localVar.unflatten(buffer, expectedCount)) { \ |
368 return NULL; \ | 386 return NULL; \ |
369 } \ | 387 } \ |
370 } while (0) | 388 } while (0) |
371 | 389 |
372 #endif | 390 #endif |
OLD | NEW |