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1 /* | 1 /* |
2 * Copyright 2013 Google Inc. | 2 * Copyright 2013 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 #include "SkMipMap.h" | 8 #include "SkMipMap.h" |
9 #include "SkBitmap.h" | 9 #include "SkBitmap.h" |
10 #include "SkColorPriv.h" | 10 #include "SkColorPriv.h" |
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185 | 185 |
186 for (int i = 0; i < countLevels; ++i) { | 186 for (int i = 0; i < countLevels; ++i) { |
187 width >>= 1; | 187 width >>= 1; |
188 height >>= 1; | 188 height >>= 1; |
189 rowBytes = SkToU32(SkBitmap::ComputeRowBytes(config, width)); | 189 rowBytes = SkToU32(SkBitmap::ComputeRowBytes(config, width)); |
190 | 190 |
191 levels[i].fPixels = addr; | 191 levels[i].fPixels = addr; |
192 levels[i].fWidth = width; | 192 levels[i].fWidth = width; |
193 levels[i].fHeight = height; | 193 levels[i].fHeight = height; |
194 levels[i].fRowBytes = rowBytes; | 194 levels[i].fRowBytes = rowBytes; |
| 195 levels[i].fScale = (float)width / src.width(); |
195 | 196 |
196 SkBitmap dstBM; | 197 SkBitmap dstBM; |
197 dstBM.setConfig(config, width, height, rowBytes); | 198 dstBM.setConfig(config, width, height, rowBytes); |
198 dstBM.setPixels(addr); | 199 dstBM.setPixels(addr); |
199 | 200 |
200 srcBM.lockPixels(); | 201 srcBM.lockPixels(); |
201 for (int y = 0; y < height; y++) { | 202 for (int y = 0; y < height; y++) { |
202 for (int x = 0; x < width; x++) { | 203 for (int x = 0; x < width; x++) { |
203 proc(&dstBM, x, y, srcBM); | 204 proc(&dstBM, x, y, srcBM); |
204 } | 205 } |
205 } | 206 } |
206 srcBM.unlockPixels(); | 207 srcBM.unlockPixels(); |
207 | 208 |
208 srcBM = dstBM; | 209 srcBM = dstBM; |
209 addr += height * rowBytes; | 210 addr += height * rowBytes; |
210 } | 211 } |
211 SkASSERT(addr == baseAddr + size); | 212 SkASSERT(addr == baseAddr + size); |
212 | 213 |
213 return SkNEW_ARGS(SkMipMap, (levels, countLevels)); | 214 return SkNEW_ARGS(SkMipMap, (levels, countLevels, size)); |
| 215 } |
| 216 |
| 217 /////////////////////////////////////////////////////////////////////////////// |
| 218 |
| 219 //static int gCounter; |
| 220 |
| 221 SkMipMap::SkMipMap(Level* levels, int count, size_t size) |
| 222 : fSize(size), fLevels(levels), fCount(count) { |
| 223 SkASSERT(levels); |
| 224 SkASSERT(count > 0); |
| 225 // SkDebugf("mips %d\n", ++gCounter); |
| 226 } |
| 227 |
| 228 SkMipMap::~SkMipMap() { |
| 229 sk_free(fLevels); |
| 230 // SkDebugf("mips %d\n", --gCounter); |
214 } | 231 } |
215 | 232 |
216 static SkFixed compute_level(SkScalar scale) { | 233 static SkFixed compute_level(SkScalar scale) { |
217 SkFixed s = SkAbs32(SkScalarToFixed(SkScalarInvert(scale))); | 234 SkFixed s = SkAbs32(SkScalarToFixed(SkScalarInvert(scale))); |
218 | 235 |
219 if (s < SK_Fixed1) { | 236 if (s < SK_Fixed1) { |
220 return 0; | 237 return 0; |
221 } | 238 } |
222 int clz = SkCLZ(s); | 239 int clz = SkCLZ(s); |
223 SkASSERT(clz >= 1 && clz <= 15); | 240 SkASSERT(clz >= 1 && clz <= 15); |
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236 } | 253 } |
237 | 254 |
238 if (level > fCount) { | 255 if (level > fCount) { |
239 level = fCount; | 256 level = fCount; |
240 } | 257 } |
241 if (levelPtr) { | 258 if (levelPtr) { |
242 *levelPtr = fLevels[level - 1]; | 259 *levelPtr = fLevels[level - 1]; |
243 } | 260 } |
244 return true; | 261 return true; |
245 } | 262 } |
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