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1 | 1 |
2 /* | 2 /* |
3 * Copyright 2010 Google Inc. | 3 * Copyright 2010 Google Inc. |
4 * | 4 * |
5 * Use of this source code is governed by a BSD-style license that can be | 5 * Use of this source code is governed by a BSD-style license that can be |
6 * found in the LICENSE file. | 6 * found in the LICENSE file. |
7 */ | 7 */ |
8 | 8 |
9 | 9 |
10 | 10 |
11 #include "SkGrPixelRef.h" | 11 #include "SkGrPixelRef.h" |
12 | |
13 #include "GrContext.h" | 12 #include "GrContext.h" |
14 #include "GrTexture.h" | 13 #include "GrTexture.h" |
15 #include "SkBitmapCache.h" | |
16 #include "SkGr.h" | 14 #include "SkGr.h" |
17 #include "SkRect.h" | 15 #include "SkRect.h" |
18 | 16 |
19 // since we call lockPixels recursively on fBitmap, we need a distinct mutex, | 17 // since we call lockPixels recursively on fBitmap, we need a distinct mutex, |
20 // to avoid deadlock with the default one provided by SkPixelRef. | 18 // to avoid deadlock with the default one provided by SkPixelRef. |
21 SK_DECLARE_STATIC_MUTEX(gROLockPixelsPixelRefMutex); | 19 SK_DECLARE_STATIC_MUTEX(gROLockPixelsPixelRefMutex); |
22 | 20 |
23 SkROLockPixelsPixelRef::SkROLockPixelsPixelRef(const SkImageInfo& info) | 21 SkROLockPixelsPixelRef::SkROLockPixelsPixelRef(const SkImageInfo& info) |
24 : INHERITED(info, &gROLockPixelsPixelRefMutex) {} | 22 : INHERITED(info, &gROLockPixelsPixelRefMutex) {} |
25 | 23 |
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138 if (fSurface) { | 136 if (fSurface) { |
139 return fSurface->asTexture(); | 137 return fSurface->asTexture(); |
140 } | 138 } |
141 return NULL; | 139 return NULL; |
142 } | 140 } |
143 | 141 |
144 SkPixelRef* SkGrPixelRef::deepCopy(SkColorType dstCT, const SkIRect* subset) { | 142 SkPixelRef* SkGrPixelRef::deepCopy(SkColorType dstCT, const SkIRect* subset) { |
145 if (NULL == fSurface) { | 143 if (NULL == fSurface) { |
146 return NULL; | 144 return NULL; |
147 } | 145 } |
148 | 146 |
149 // Note that when copying a render-target-backed pixel ref, we | 147 // Note that when copying a render-target-backed pixel ref, we |
150 // return a texture-backed pixel ref instead. This is because | 148 // return a texture-backed pixel ref instead. This is because |
151 // render-target pixel refs are usually created in conjunction with | 149 // render-target pixel refs are usually created in conjunction with |
152 // a GrTexture owned elsewhere (e.g., SkGpuDevice), and cannot live | 150 // a GrTexture owned elsewhere (e.g., SkGpuDevice), and cannot live |
153 // independently of that texture. Texture-backed pixel refs, on the other | 151 // independently of that texture. Texture-backed pixel refs, on the other |
154 // hand, own their GrTextures, and are thus self-contained. | 152 // hand, own their GrTextures, and are thus self-contained. |
155 return copyToTexturePixelRef(fSurface->asTexture(), dstCT, subset); | 153 return copyToTexturePixelRef(fSurface->asTexture(), dstCT, subset); |
156 } | 154 } |
157 | 155 |
158 static bool tryAllocBitmapPixels(SkBitmap* bitmap) { | |
159 SkBitmap::Allocator* allocator = SkBitmapCache::GetAllocator(); | |
160 if (NULL != allocator) { | |
161 return allocator->allocPixelRef(bitmap, 0); | |
162 } else { | |
163 // DiscardableMemory is not available, fallback to default allocator | |
164 return bitmap->tryAllocPixels(); | |
165 } | |
166 } | |
167 | |
168 bool SkGrPixelRef::onReadPixels(SkBitmap* dst, const SkIRect* subset) { | 156 bool SkGrPixelRef::onReadPixels(SkBitmap* dst, const SkIRect* subset) { |
169 if (NULL == fSurface || fSurface->wasDestroyed()) { | 157 if (NULL == fSurface || fSurface->wasDestroyed()) { |
170 return false; | 158 return false; |
171 } | 159 } |
172 | 160 |
173 SkIRect bounds; | 161 int left, top, width, height; |
174 if (subset) { | 162 if (subset) { |
175 bounds = *subset; | 163 left = subset->fLeft; |
| 164 width = subset->width(); |
| 165 top = subset->fTop; |
| 166 height = subset->height(); |
176 } else { | 167 } else { |
177 bounds = SkIRect::MakeWH(this->info().width(), this->info().height()); | 168 left = 0; |
| 169 width = this->info().width(); |
| 170 top = 0; |
| 171 height = this->info().height(); |
178 } | 172 } |
179 | 173 if (!dst->tryAllocN32Pixels(width, height)) { |
180 //Check the cache | 174 SkDebugf("SkGrPixelRef::onReadPixels failed to alloc bitmap for result!\
n"); |
181 if(!SkBitmapCache::Find(this->getGenerationID(), bounds, dst)) { | 175 return false; |
182 //Cache miss | 176 } |
183 | 177 SkAutoLockPixels al(*dst); |
184 SkBitmap cachedBitmap; | 178 void* buffer = dst->getPixels(); |
185 cachedBitmap.setInfo(this->info().makeWH(bounds.width(), bounds.height()
)); | 179 return fSurface->readPixels(left, top, width, height, |
186 | |
187 // If we can't alloc the pixels, then fail | |
188 if (!tryAllocBitmapPixels(&cachedBitmap)) { | |
189 return false; | |
190 } | |
191 | |
192 // Try to read the pixels from the surface | |
193 void* buffer = cachedBitmap.getPixels(); | |
194 bool readPixelsOk = fSurface->readPixels(bounds.fLeft, bounds.fTop, | |
195 bounds.width(), bounds.height(), | |
196 kSkia8888_GrPixelConfig, | 180 kSkia8888_GrPixelConfig, |
197 buffer, cachedBitmap.rowBytes()); | 181 buffer, dst->rowBytes()); |
198 | |
199 if (!readPixelsOk) { | |
200 return false; | |
201 } | |
202 | |
203 // If we are here, pixels were read correctly from the surface. | |
204 cachedBitmap.setImmutable(); | |
205 //Add to the cache | |
206 SkBitmapCache::Add(this->getGenerationID(), bounds, cachedBitmap); | |
207 | |
208 dst->swap(cachedBitmap); | |
209 } | |
210 | |
211 return true; | |
212 | |
213 } | 182 } |
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