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1 /* | 1 /* |
2 * Copyright 2015 Google Inc. | 2 * Copyright 2015 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 SkBlurImageFilter_opts_DEFINED | 8 #ifndef SkBlurImageFilter_opts_DEFINED |
9 #define SkBlurImageFilter_opts_DEFINED | 9 #define SkBlurImageFilter_opts_DEFINED |
10 | 10 |
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167 sumB -= SkGetPackedB32(c) | 167 sumB -= SkGetPackedB32(c) |
168 #define STORE_SUMS \ | 168 #define STORE_SUMS \ |
169 *dptr = SkPackARGB32((sumA * scale + half) >> 24, \ | 169 *dptr = SkPackARGB32((sumA * scale + half) >> 24, \ |
170 (sumR * scale + half) >> 24, \ | 170 (sumR * scale + half) >> 24, \ |
171 (sumG * scale + half) >> 24, \ | 171 (sumG * scale + half) >> 24, \ |
172 (sumB * scale + half) >> 24); | 172 (sumB * scale + half) >> 24); |
173 #define DOUBLE_ROW_OPTIMIZATION | 173 #define DOUBLE_ROW_OPTIMIZATION |
174 | 174 |
175 #endif | 175 #endif |
176 | 176 |
| 177 #define PREFETCH_RPTR \ |
| 178 if (srcDirection == BlurDirection::kY) { \ |
| 179 SK_PREFETCH(rptr); \ |
| 180 } |
| 181 |
177 template<BlurDirection srcDirection, BlurDirection dstDirection> | 182 template<BlurDirection srcDirection, BlurDirection dstDirection> |
178 static void box_blur(const SkPMColor* src, int srcStride, SkPMColor* dst, int ke
rnelSize, | 183 static void box_blur(const SkPMColor* src, int srcStride, SkPMColor* dst, int ke
rnelSize, |
179 int leftOffset, int rightOffset, int width, int height) { | 184 int leftOffset, int rightOffset, int width, int height) { |
180 int rightBorder = SkMin32(rightOffset + 1, width); | 185 int incrementStart = SkMax32(-rightOffset - 1, -width); |
| 186 int incrementEnd = SkMax32(width - rightOffset - 1, 0); |
| 187 int decrementStart = SkMin32(leftOffset, width); |
181 int srcStrideX = srcDirection == BlurDirection::kX ? 1 : srcStride; | 188 int srcStrideX = srcDirection == BlurDirection::kX ? 1 : srcStride; |
182 int dstStrideX = dstDirection == BlurDirection::kX ? 1 : height; | 189 int dstStrideX = dstDirection == BlurDirection::kX ? 1 : height; |
183 int srcStrideY = srcDirection == BlurDirection::kX ? srcStride : 1; | 190 int srcStrideY = srcDirection == BlurDirection::kX ? srcStride : 1; |
184 int dstStrideY = dstDirection == BlurDirection::kX ? width : 1; | 191 int dstStrideY = dstDirection == BlurDirection::kX ? width : 1; |
185 INIT_SCALE | 192 INIT_SCALE |
186 INIT_HALF | 193 INIT_HALF |
187 | 194 |
188 DOUBLE_ROW_OPTIMIZATION | 195 DOUBLE_ROW_OPTIMIZATION |
189 | 196 |
190 for (int y = 0; y < height; ++y) { | 197 for (int y = 0; y < height; ++y) { |
191 INIT_SUMS | 198 INIT_SUMS |
192 const SkPMColor* p = src; | 199 const SkPMColor* lptr = src; |
193 for (int i = 0; i < rightBorder; ++i) { | 200 const SkPMColor* rptr = src; |
194 INCREMENT_SUMS(*p); | 201 SkColor* dptr = dst; |
195 p += srcStrideX; | 202 int x; |
| 203 for (x = incrementStart; x < 0; ++x) { |
| 204 INCREMENT_SUMS(*rptr); |
| 205 rptr += srcStrideX; |
| 206 PREFETCH_RPTR |
196 } | 207 } |
197 | 208 for (; x < decrementStart && x < incrementEnd; ++x) { |
198 const SkPMColor* sptr = src; | |
199 SkColor* dptr = dst; | |
200 for (int x = 0; x < width; ++x) { | |
201 STORE_SUMS | 209 STORE_SUMS |
202 if (x >= leftOffset) { | |
203 SkColor l = *(sptr - leftOffset * srcStrideX); | |
204 DECREMENT_SUMS(l); | |
205 } | |
206 if (x + rightOffset + 1 < width) { | |
207 SkColor r = *(sptr + (rightOffset + 1) * srcStrideX); | |
208 INCREMENT_SUMS(r); | |
209 } | |
210 sptr += srcStrideX; | |
211 if (srcDirection == BlurDirection::kY) { | |
212 SK_PREFETCH(sptr + (rightOffset + 1) * srcStrideX); | |
213 } | |
214 dptr += dstStrideX; | 210 dptr += dstStrideX; |
| 211 INCREMENT_SUMS(*rptr); |
| 212 rptr += srcStrideX; |
| 213 PREFETCH_RPTR |
| 214 } |
| 215 for (x = decrementStart; x < incrementEnd; ++x) { |
| 216 STORE_SUMS |
| 217 dptr += dstStrideX; |
| 218 INCREMENT_SUMS(*rptr); |
| 219 rptr += srcStrideX; |
| 220 PREFETCH_RPTR |
| 221 DECREMENT_SUMS(*lptr); |
| 222 lptr += srcStrideX; |
| 223 } |
| 224 for (x = incrementEnd; x < decrementStart; ++x) { |
| 225 STORE_SUMS |
| 226 dptr += dstStrideX; |
| 227 } |
| 228 for (; x < width; ++x) { |
| 229 STORE_SUMS |
| 230 dptr += dstStrideX; |
| 231 DECREMENT_SUMS(*lptr); |
| 232 lptr += srcStrideX; |
215 } | 233 } |
216 src += srcStrideY; | 234 src += srcStrideY; |
217 dst += dstStrideY; | 235 dst += dstStrideY; |
218 } | 236 } |
219 } | 237 } |
220 | 238 |
221 static auto box_blur_xx = &box_blur<BlurDirection::kX, BlurDirection::kX>, | 239 static auto box_blur_xx = &box_blur<BlurDirection::kX, BlurDirection::kX>, |
222 box_blur_xy = &box_blur<BlurDirection::kX, BlurDirection::kY>, | 240 box_blur_xy = &box_blur<BlurDirection::kX, BlurDirection::kY>, |
223 box_blur_yx = &box_blur<BlurDirection::kY, BlurDirection::kX>; | 241 box_blur_yx = &box_blur<BlurDirection::kY, BlurDirection::kX>; |
224 | 242 |
225 } // namespace SK_OPTS_NS | 243 } // namespace SK_OPTS_NS |
226 | 244 |
227 #endif | 245 #endif |
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