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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 "SkGpuBlurUtils.h" | 8 #include "SkGpuBlurUtils.h" |
9 | 9 |
10 #include "SkRect.h" | 10 #include "SkRect.h" |
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156 // Draw right and left margins with bounds; middle without. | 156 // Draw right and left margins with bounds; middle without. |
157 convolve_gaussian_1d(drawContext, clip, leftRect, srcOffset, texture, | 157 convolve_gaussian_1d(drawContext, clip, leftRect, srcOffset, texture, |
158 direction, radius, sigma, true, bounds); | 158 direction, radius, sigma, true, bounds); |
159 convolve_gaussian_1d(drawContext, clip, rightRect, srcOffset, texture, | 159 convolve_gaussian_1d(drawContext, clip, rightRect, srcOffset, texture, |
160 direction, radius, sigma, true, bounds); | 160 direction, radius, sigma, true, bounds); |
161 convolve_gaussian_1d(drawContext, clip, midRect, srcOffset, texture, | 161 convolve_gaussian_1d(drawContext, clip, midRect, srcOffset, texture, |
162 direction, radius, sigma, false, bounds); | 162 direction, radius, sigma, false, bounds); |
163 } | 163 } |
164 } | 164 } |
165 | 165 |
166 GrTexture* GaussianBlur(GrContext* context, | 166 sk_sp<GrDrawContext> GaussianBlur(GrContext* context, |
167 GrTexture* srcTexture, | 167 GrTexture* origSrc, |
168 bool gammaCorrect, | 168 bool gammaCorrect, |
169 const SkRect& dstBounds, | 169 const SkRect& dstBounds, |
170 const SkRect* srcBounds, | 170 const SkRect* srcBounds, |
171 float sigmaX, | 171 float sigmaX, |
172 float sigmaY) { | 172 float sigmaY) { |
173 SkASSERT(context); | 173 SkASSERT(context); |
174 SkIRect clearRect; | 174 SkIRect clearRect; |
175 int scaleFactorX, radiusX; | 175 int scaleFactorX, radiusX; |
176 int scaleFactorY, radiusY; | 176 int scaleFactorY, radiusY; |
177 int maxTextureSize = context->caps()->maxTextureSize(); | 177 int maxTextureSize = context->caps()->maxTextureSize(); |
178 sigmaX = adjust_sigma(sigmaX, maxTextureSize, &scaleFactorX, &radiusX); | 178 sigmaX = adjust_sigma(sigmaX, maxTextureSize, &scaleFactorX, &radiusX); |
179 sigmaY = adjust_sigma(sigmaY, maxTextureSize, &scaleFactorY, &radiusY); | 179 sigmaY = adjust_sigma(sigmaY, maxTextureSize, &scaleFactorY, &radiusY); |
180 | 180 |
181 SkPoint srcOffset = SkPoint::Make(-dstBounds.x(), -dstBounds.y()); | 181 SkPoint srcOffset = SkPoint::Make(-dstBounds.x(), -dstBounds.y()); |
182 SkRect localDstBounds = SkRect::MakeWH(dstBounds.width(), dstBounds.height()
); | 182 SkRect localDstBounds = SkRect::MakeWH(dstBounds.width(), dstBounds.height()
); |
183 SkRect localSrcBounds; | 183 SkRect localSrcBounds; |
184 SkRect srcRect; | 184 SkRect srcRect; |
185 if (srcBounds) { | 185 if (srcBounds) { |
186 srcRect = localSrcBounds = *srcBounds; | 186 srcRect = localSrcBounds = *srcBounds; |
187 srcRect.offset(srcOffset); | 187 srcRect.offset(srcOffset); |
188 srcBounds = &localSrcBounds; | 188 srcBounds = &localSrcBounds; |
189 } else { | 189 } else { |
190 srcRect = localDstBounds; | 190 srcRect = localDstBounds; |
191 } | 191 } |
192 | 192 |
193 scale_rect(&srcRect, 1.0f / scaleFactorX, 1.0f / scaleFactorY); | 193 scale_rect(&srcRect, 1.0f / scaleFactorX, 1.0f / scaleFactorY); |
194 srcRect.roundOut(&srcRect); | 194 srcRect.roundOut(&srcRect); |
195 scale_rect(&srcRect, static_cast<float>(scaleFactorX), | 195 scale_rect(&srcRect, static_cast<float>(scaleFactorX), |
196 static_cast<float>(scaleFactorY)); | 196 static_cast<float>(scaleFactorY)); |
197 | 197 |
198 // setup new clip | 198 // setup new clip |
199 GrClip clip(localDstBounds); | 199 GrClip clip(localDstBounds); |
200 | 200 |
| 201 sk_sp<GrTexture> srcTexture(sk_ref_sp(origSrc)); |
| 202 |
201 SkASSERT(kBGRA_8888_GrPixelConfig == srcTexture->config() || | 203 SkASSERT(kBGRA_8888_GrPixelConfig == srcTexture->config() || |
202 kRGBA_8888_GrPixelConfig == srcTexture->config() || | 204 kRGBA_8888_GrPixelConfig == srcTexture->config() || |
203 kSRGBA_8888_GrPixelConfig == srcTexture->config() || | 205 kSRGBA_8888_GrPixelConfig == srcTexture->config() || |
204 kSBGRA_8888_GrPixelConfig == srcTexture->config() || | 206 kSBGRA_8888_GrPixelConfig == srcTexture->config() || |
205 kAlpha_8_GrPixelConfig == srcTexture->config()); | 207 kAlpha_8_GrPixelConfig == srcTexture->config()); |
206 | 208 |
207 const int width = SkScalarFloorToInt(dstBounds.width()); | 209 const int width = SkScalarFloorToInt(dstBounds.width()); |
208 const int height = SkScalarFloorToInt(dstBounds.height()); | 210 const int height = SkScalarFloorToInt(dstBounds.height()); |
209 const GrPixelConfig config = srcTexture->config(); | 211 const GrPixelConfig config = srcTexture->config(); |
210 | 212 |
211 const SkSurfaceProps props(gammaCorrect ? SkSurfaceProps::kGammaCorrect_Flag
: 0, | 213 const SkSurfaceProps props(gammaCorrect ? SkSurfaceProps::kGammaCorrect_Flag
: 0, |
212 SkSurfaceProps::kLegacyFontHost_InitType); | 214 SkSurfaceProps::kLegacyFontHost_InitType); |
213 | 215 |
| 216 sk_sp<GrDrawContext> dstDrawContext(context->newDrawContext(SkBackingFit::kA
pprox, |
| 217 width, height, c
onfig, |
| 218 0, kDefault_GrSu
rfaceOrigin, |
| 219 &props)); |
| 220 if (!dstDrawContext) { |
| 221 return nullptr; |
| 222 } |
| 223 |
214 // For really small blurs (certainly no wider than 5x5 on desktop gpus) it i
s faster to just | 224 // For really small blurs (certainly no wider than 5x5 on desktop gpus) it i
s faster to just |
215 // launch a single non separable kernel vs two launches | 225 // launch a single non separable kernel vs two launches |
216 if (sigmaX > 0.0f && sigmaY > 0.0f && | 226 if (sigmaX > 0.0f && sigmaY > 0.0f && |
217 (2 * radiusX + 1) * (2 * radiusY + 1) <= MAX_KERNEL_SIZE) { | 227 (2 * radiusX + 1) * (2 * radiusY + 1) <= MAX_KERNEL_SIZE) { |
218 // We shouldn't be scaling because this is a small size blur | 228 // We shouldn't be scaling because this is a small size blur |
219 SkASSERT((1 == scaleFactorX) && (1 == scaleFactorY)); | 229 SkASSERT((1 == scaleFactorX) && (1 == scaleFactorY)); |
220 | 230 |
221 sk_sp<GrDrawContext> dstDrawContext(context->newDrawContext(SkBackingFit
::kApprox, | |
222 width, heigh
t, config, | |
223 0, kDefault_
GrSurfaceOrigin, | |
224 &props)); | |
225 if (!dstDrawContext) { | |
226 return nullptr; | |
227 } | |
228 convolve_gaussian_2d(dstDrawContext.get(), clip, localDstBounds, srcOffs
et, | 231 convolve_gaussian_2d(dstDrawContext.get(), clip, localDstBounds, srcOffs
et, |
229 srcTexture, radiusX, radiusY, sigmaX, sigmaY, srcBo
unds); | 232 srcTexture.get(), radiusX, radiusY, sigmaX, sigmaY,
srcBounds); |
230 | 233 |
231 return dstDrawContext->asTexture().release(); | 234 return dstDrawContext; |
232 } | 235 } |
233 | 236 |
234 GrSurfaceDesc desc; | 237 sk_sp<GrDrawContext> tmpDrawContext(context->newDrawContext(SkBackingFit::kA
pprox, |
235 desc.fFlags = kRenderTarget_GrSurfaceFlag; | 238 width, height, c
onfig, |
236 desc.fWidth = width; | 239 0, kDefault_GrSu
rfaceOrigin, |
237 desc.fHeight = height; | 240 &props)); |
238 desc.fConfig = config; | 241 if (!tmpDrawContext) { |
239 | |
240 GrTexture* dstTexture; | |
241 GrTexture* tempTexture; | |
242 SkAutoTUnref<GrTexture> temp1, temp2; | |
243 | |
244 temp1.reset(context->textureProvider()->createApproxTexture(desc)); | |
245 dstTexture = temp1.get(); | |
246 temp2.reset(context->textureProvider()->createApproxTexture(desc)); | |
247 tempTexture = temp2.get(); | |
248 | |
249 if (!dstTexture || !tempTexture) { | |
250 return nullptr; | 242 return nullptr; |
251 } | 243 } |
252 | 244 |
253 sk_sp<GrDrawContext> srcDrawContext; | 245 sk_sp<GrDrawContext> srcDrawContext; |
254 | 246 |
255 for (int i = 1; i < scaleFactorX || i < scaleFactorY; i *= 2) { | 247 for (int i = 1; i < scaleFactorX || i < scaleFactorY; i *= 2) { |
256 GrPaint paint; | 248 GrPaint paint; |
257 paint.setGammaCorrect(gammaCorrect); | 249 paint.setGammaCorrect(gammaCorrect); |
258 SkMatrix matrix; | 250 SkMatrix matrix; |
259 matrix.setIDiv(srcTexture->width(), srcTexture->height()); | 251 matrix.setIDiv(srcTexture->width(), srcTexture->height()); |
260 SkRect dstRect(srcRect); | 252 SkRect dstRect(srcRect); |
261 if (srcBounds && i == 1) { | 253 if (srcBounds && i == 1) { |
262 SkRect domain; | 254 SkRect domain; |
263 matrix.mapRect(&domain, *srcBounds); | 255 matrix.mapRect(&domain, *srcBounds); |
264 domain.inset((i < scaleFactorX) ? SK_ScalarHalf / srcTexture->width(
) : 0.0f, | 256 domain.inset((i < scaleFactorX) ? SK_ScalarHalf / srcTexture->width(
) : 0.0f, |
265 (i < scaleFactorY) ? SK_ScalarHalf / srcTexture->height
() : 0.0f); | 257 (i < scaleFactorY) ? SK_ScalarHalf / srcTexture->height
() : 0.0f); |
266 sk_sp<const GrFragmentProcessor> fp(GrTextureDomainEffect::Create( | 258 sk_sp<const GrFragmentProcessor> fp(GrTextureDomainEffect::Create( |
267 srcTexture, | 259 srcTexture.get(), |
268 matrix, | 260 matrix, |
269 domain, | 261 domain, |
270 GrTextureDomain::kDecal_
Mode, | 262 GrTextureDomain::kDecal_
Mode, |
271 GrTextureParams::kBilerp
_FilterMode)); | 263 GrTextureParams::kBilerp
_FilterMode)); |
272 paint.addColorFragmentProcessor(fp.get()); | 264 paint.addColorFragmentProcessor(fp.get()); |
273 srcRect.offset(-srcOffset); | 265 srcRect.offset(-srcOffset); |
274 srcOffset.set(0, 0); | 266 srcOffset.set(0, 0); |
275 } else { | 267 } else { |
276 GrTextureParams params(SkShader::kClamp_TileMode, GrTextureParams::k
Bilerp_FilterMode); | 268 GrTextureParams params(SkShader::kClamp_TileMode, GrTextureParams::k
Bilerp_FilterMode); |
277 paint.addColorTextureProcessor(srcTexture, matrix, params); | 269 paint.addColorTextureProcessor(srcTexture.get(), matrix, params); |
278 } | 270 } |
279 paint.setPorterDuffXPFactory(SkXfermode::kSrc_Mode); | 271 paint.setPorterDuffXPFactory(SkXfermode::kSrc_Mode); |
280 scale_rect(&dstRect, i < scaleFactorX ? 0.5f : 1.0f, | 272 scale_rect(&dstRect, i < scaleFactorX ? 0.5f : 1.0f, |
281 i < scaleFactorY ? 0.5f : 1.0f); | 273 i < scaleFactorY ? 0.5f : 1.0f); |
282 | 274 |
283 sk_sp<GrDrawContext> dstDrawContext( | |
284 context->drawContext(sk_ref_sp(dstTexture->as
RenderTarget()))); | |
285 if (!dstDrawContext) { | |
286 return nullptr; | |
287 } | |
288 dstDrawContext->fillRectToRect(clip, paint, SkMatrix::I(), dstRect, srcR
ect); | 275 dstDrawContext->fillRectToRect(clip, paint, SkMatrix::I(), dstRect, srcR
ect); |
289 | 276 |
290 srcDrawContext.swap(dstDrawContext); | 277 srcDrawContext = dstDrawContext; |
291 srcRect = dstRect; | 278 srcRect = dstRect; |
292 srcTexture = dstTexture; | 279 srcTexture = srcDrawContext->asTexture(); |
293 SkTSwap(dstTexture, tempTexture); | 280 dstDrawContext.swap(tmpDrawContext); |
294 localSrcBounds = srcRect; | 281 localSrcBounds = srcRect; |
295 } | 282 } |
296 | 283 |
297 srcRect = localDstBounds; | 284 srcRect = localDstBounds; |
298 | 285 |
299 scale_rect(&srcRect, 1.0f / scaleFactorX, 1.0f / scaleFactorY); | 286 scale_rect(&srcRect, 1.0f / scaleFactorX, 1.0f / scaleFactorY); |
300 srcRect.roundOut(&srcRect); | 287 srcRect.roundOut(&srcRect); |
301 SkIRect srcIRect = srcRect.roundOut(); | 288 SkIRect srcIRect = srcRect.roundOut(); |
302 if (sigmaX > 0.0f) { | 289 if (sigmaX > 0.0f) { |
303 if (scaleFactorX > 1) { | 290 if (scaleFactorX > 1) { |
304 // TODO: if we pass in the source draw context we don't need this he
re | 291 SkASSERT(srcDrawContext); |
305 if (!srcDrawContext) { | |
306 srcDrawContext = context->drawContext(sk_ref_sp(srcTexture->asRe
nderTarget())); | |
307 if (!srcDrawContext) { | |
308 return nullptr; | |
309 } | |
310 } | |
311 | 292 |
312 // Clear out a radius to the right of the srcRect to prevent the | 293 // Clear out a radius to the right of the srcRect to prevent the |
313 // X convolution from reading garbage. | 294 // X convolution from reading garbage. |
314 clearRect = SkIRect::MakeXYWH(srcIRect.fRight, srcIRect.fTop, | 295 clearRect = SkIRect::MakeXYWH(srcIRect.fRight, srcIRect.fTop, |
315 radiusX, srcIRect.height()); | 296 radiusX, srcIRect.height()); |
316 srcDrawContext->clear(&clearRect, 0x0, false); | 297 srcDrawContext->clear(&clearRect, 0x0, false); |
317 } | 298 } |
318 | 299 |
319 sk_sp<GrDrawContext> dstDrawContext( | |
320 context->drawContext(sk_ref_sp(dstTexture->asRenderTarget()), &props
)); | |
321 if (!dstDrawContext) { | |
322 return nullptr; | |
323 } | |
324 convolve_gaussian(dstDrawContext.get(), clip, srcRect, | 300 convolve_gaussian(dstDrawContext.get(), clip, srcRect, |
325 srcTexture, Gr1DKernelEffect::kX_Direction, radiusX, s
igmaX, | 301 srcTexture.get(), Gr1DKernelEffect::kX_Direction, radi
usX, sigmaX, |
326 srcBounds, srcOffset); | 302 srcBounds, srcOffset); |
327 srcDrawContext.swap(dstDrawContext); | 303 srcDrawContext = dstDrawContext; |
328 srcTexture = dstTexture; | 304 srcTexture = srcDrawContext->asTexture(); |
329 srcRect.offsetTo(0, 0); | 305 srcRect.offsetTo(0, 0); |
330 SkTSwap(dstTexture, tempTexture); | 306 dstDrawContext.swap(tmpDrawContext); |
331 localSrcBounds = srcRect; | 307 localSrcBounds = srcRect; |
332 srcOffset.set(0, 0); | 308 srcOffset.set(0, 0); |
333 } | 309 } |
334 | 310 |
335 if (sigmaY > 0.0f) { | 311 if (sigmaY > 0.0f) { |
336 if (scaleFactorY > 1 || sigmaX > 0.0f) { | 312 if (scaleFactorY > 1 || sigmaX > 0.0f) { |
337 // TODO: if we pass in the source draw context we don't need this he
re | 313 SkASSERT(srcDrawContext); |
338 if (!srcDrawContext) { | |
339 srcDrawContext = context->drawContext(sk_ref_sp(srcTexture->asRe
nderTarget())); | |
340 if (!srcDrawContext) { | |
341 return nullptr; | |
342 } | |
343 } | |
344 | 314 |
345 // Clear out a radius below the srcRect to prevent the Y | 315 // Clear out a radius below the srcRect to prevent the Y |
346 // convolution from reading garbage. | 316 // convolution from reading garbage. |
347 clearRect = SkIRect::MakeXYWH(srcIRect.fLeft, srcIRect.fBottom, | 317 clearRect = SkIRect::MakeXYWH(srcIRect.fLeft, srcIRect.fBottom, |
348 srcIRect.width(), radiusY); | 318 srcIRect.width(), radiusY); |
349 srcDrawContext->clear(&clearRect, 0x0, false); | 319 srcDrawContext->clear(&clearRect, 0x0, false); |
350 } | 320 } |
351 | 321 |
352 sk_sp<GrDrawContext> dstDrawContext( | |
353 context->drawContext(sk_ref_sp(dstTexture->asRenderTarget()), &props
)); | |
354 if (!dstDrawContext) { | |
355 return nullptr; | |
356 } | |
357 convolve_gaussian(dstDrawContext.get(), clip, srcRect, | 322 convolve_gaussian(dstDrawContext.get(), clip, srcRect, |
358 srcTexture, Gr1DKernelEffect::kY_Direction, radiusY, s
igmaY, | 323 srcTexture.get(), Gr1DKernelEffect::kY_Direction, radi
usY, sigmaY, |
359 srcBounds, srcOffset); | 324 srcBounds, srcOffset); |
360 | 325 |
361 srcDrawContext.swap(dstDrawContext); | 326 srcDrawContext = dstDrawContext; |
362 srcTexture = dstTexture; | |
363 srcRect.offsetTo(0, 0); | 327 srcRect.offsetTo(0, 0); |
364 SkTSwap(dstTexture, tempTexture); | 328 dstDrawContext.swap(tmpDrawContext); |
365 } | 329 } |
366 | 330 |
| 331 SkASSERT(srcDrawContext); |
| 332 srcTexture = nullptr; // we don't use this from here on out |
367 srcIRect = srcRect.roundOut(); | 333 srcIRect = srcRect.roundOut(); |
368 | 334 |
369 if (scaleFactorX > 1 || scaleFactorY > 1) { | 335 if (scaleFactorX > 1 || scaleFactorY > 1) { |
370 SkASSERT(srcDrawContext); | 336 // Clear one pixel to the right and below, to accommodate bilinear upsam
pling. |
| 337 clearRect = SkIRect::MakeXYWH(srcIRect.fLeft, srcIRect.fBottom, srcIRect
.width() + 1, 1); |
| 338 srcDrawContext->clear(&clearRect, 0x0, false); |
| 339 clearRect = SkIRect::MakeXYWH(srcIRect.fRight, srcIRect.fTop, 1, srcIRec
t.height()); |
| 340 srcDrawContext->clear(&clearRect, 0x0, false); |
371 | 341 |
372 // Clear one pixel to the right and below, to accommodate bilinear | |
373 // upsampling. | |
374 clearRect = SkIRect::MakeXYWH(srcIRect.fLeft, srcIRect.fBottom, | |
375 srcIRect.width() + 1, 1); | |
376 srcDrawContext->clear(&clearRect, 0x0, false); | |
377 clearRect = SkIRect::MakeXYWH(srcIRect.fRight, srcIRect.fTop, | |
378 1, srcIRect.height()); | |
379 srcDrawContext->clear(&clearRect, 0x0, false); | |
380 SkMatrix matrix; | 342 SkMatrix matrix; |
381 matrix.setIDiv(srcTexture->width(), srcTexture->height()); | 343 matrix.setIDiv(srcDrawContext->width(), srcDrawContext->height()); |
382 | 344 |
383 GrPaint paint; | 345 GrPaint paint; |
384 paint.setGammaCorrect(gammaCorrect); | 346 paint.setGammaCorrect(gammaCorrect); |
385 // FIXME: this should be mitchell, not bilinear. | 347 // FIXME: this should be mitchell, not bilinear. |
386 GrTextureParams params(SkShader::kClamp_TileMode, GrTextureParams::kBile
rp_FilterMode); | 348 GrTextureParams params(SkShader::kClamp_TileMode, GrTextureParams::kBile
rp_FilterMode); |
387 paint.addColorTextureProcessor(srcTexture, matrix, params); | 349 sk_sp<GrTexture> tex(srcDrawContext->asTexture()); |
| 350 paint.addColorTextureProcessor(tex.get(), matrix, params); |
388 paint.setPorterDuffXPFactory(SkXfermode::kSrc_Mode); | 351 paint.setPorterDuffXPFactory(SkXfermode::kSrc_Mode); |
389 | 352 |
390 SkRect dstRect(srcRect); | 353 SkRect dstRect(srcRect); |
391 scale_rect(&dstRect, (float) scaleFactorX, (float) scaleFactorY); | 354 scale_rect(&dstRect, (float) scaleFactorX, (float) scaleFactorY); |
392 | 355 |
393 sk_sp<GrDrawContext> dstDrawContext( | |
394 context->drawContext(sk_ref_sp(dstTexture->asRen
derTarget()))); | |
395 if (!dstDrawContext) { | |
396 return nullptr; | |
397 } | |
398 dstDrawContext->fillRectToRect(clip, paint, SkMatrix::I(), dstRect, srcR
ect); | 356 dstDrawContext->fillRectToRect(clip, paint, SkMatrix::I(), dstRect, srcR
ect); |
399 | 357 |
400 srcDrawContext.swap(dstDrawContext); | 358 srcDrawContext = dstDrawContext; |
401 srcRect = dstRect; | 359 srcRect = dstRect; |
402 srcTexture = dstTexture; | 360 dstDrawContext.swap(tmpDrawContext); |
403 SkTSwap(dstTexture, tempTexture); | |
404 } | 361 } |
405 | 362 |
406 return SkRef(srcTexture); | 363 return srcDrawContext; |
407 } | 364 } |
408 #endif | 365 #endif |
409 | 366 |
410 } | 367 } |
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