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| 1 /* | |
| 2 * Copyright (C) 2008 Alex Mathews <possessedpenguinbob@gmail.com> | |
| 3 * Copyright (C) 2009 Dirk Schulze <krit@webkit.org> | |
| 4 * Copyright (C) Research In Motion Limited 2010. All rights reserved. | |
| 5 * Copyright (C) 2012 University of Szeged | |
| 6 * Copyright (C) 2013 Google Inc. All rights reserved. | |
| 7 * | |
| 8 * This library is free software; you can redistribute it and/or | |
| 9 * modify it under the terms of the GNU Library General Public | |
| 10 * License as published by the Free Software Foundation; either | |
| 11 * version 2 of the License, or (at your option) any later version. | |
| 12 * | |
| 13 * This library is distributed in the hope that it will be useful, | |
| 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 16 * Library General Public License for more details. | |
| 17 * | |
| 18 * You should have received a copy of the GNU Library General Public License | |
| 19 * along with this library; see the file COPYING.LIB. If not, write to | |
| 20 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, | |
| 21 * Boston, MA 02110-1301, USA. | |
| 22 */ | |
| 23 | |
| 24 #include "config.h" | |
| 25 | |
| 26 #include "core/platform/graphics/filters/FilterEffect.h" | |
| 27 | |
| 28 #include "core/platform/graphics/ImageBuffer.h" | |
| 29 #include "core/platform/graphics/filters/Filter.h" | |
| 30 | |
| 31 #if HAVE(ARM_NEON_INTRINSICS) | |
| 32 #include <arm_neon.h> | |
| 33 #endif | |
| 34 | |
| 35 namespace WebCore { | |
| 36 | |
| 37 FilterEffect::FilterEffect(Filter* filter) | |
| 38 : m_alphaImage(false) | |
| 39 , m_filter(filter) | |
| 40 , m_hasX(false) | |
| 41 , m_hasY(false) | |
| 42 , m_hasWidth(false) | |
| 43 , m_hasHeight(false) | |
| 44 , m_clipsToBounds(true) | |
| 45 , m_operatingColorSpace(ColorSpaceLinearRGB) | |
| 46 , m_resultColorSpace(ColorSpaceDeviceRGB) | |
| 47 { | |
| 48 ASSERT(m_filter); | |
| 49 } | |
| 50 | |
| 51 FilterEffect::~FilterEffect() | |
| 52 { | |
| 53 } | |
| 54 | |
| 55 inline bool isFilterSizeValid(IntRect rect) | |
| 56 { | |
| 57 if (rect.width() < 0 || rect.width() > kMaxFilterSize | |
| 58 || rect.height() < 0 || rect.height() > kMaxFilterSize) | |
| 59 return false; | |
| 60 return true; | |
| 61 } | |
| 62 | |
| 63 void FilterEffect::determineAbsolutePaintRect() | |
| 64 { | |
| 65 m_absolutePaintRect = IntRect(); | |
| 66 unsigned size = m_inputEffects.size(); | |
| 67 for (unsigned i = 0; i < size; ++i) | |
| 68 m_absolutePaintRect.unite(m_inputEffects.at(i)->absolutePaintRect()); | |
| 69 | |
| 70 // Filters in SVG clip to primitive subregion, while CSS doesn't. | |
| 71 if (m_clipsToBounds) | |
| 72 m_absolutePaintRect.intersect(enclosingIntRect(m_maxEffectRect)); | |
| 73 else | |
| 74 m_absolutePaintRect.unite(enclosingIntRect(m_maxEffectRect)); | |
| 75 | |
| 76 } | |
| 77 | |
| 78 FloatRect FilterEffect::mapRectRecursive(const FloatRect& rect) | |
| 79 { | |
| 80 FloatRect result; | |
| 81 if (m_inputEffects.size() > 0) { | |
| 82 result = m_inputEffects.at(0)->mapRectRecursive(rect); | |
| 83 for (unsigned i = 1; i < m_inputEffects.size(); ++i) | |
| 84 result.unite(m_inputEffects.at(i)->mapRectRecursive(rect)); | |
| 85 } else | |
| 86 result = rect; | |
| 87 return mapRect(result); | |
| 88 } | |
| 89 | |
| 90 FloatRect FilterEffect::getSourceRect(const FloatRect& destRect, const FloatRect
& destClipRect) | |
| 91 { | |
| 92 FloatRect sourceRect = mapRect(destRect, false); | |
| 93 FloatRect sourceClipRect = mapRect(destClipRect, false); | |
| 94 | |
| 95 FloatRect boundaries = effectBoundaries(); | |
| 96 if (hasX()) | |
| 97 sourceClipRect.setX(boundaries.x()); | |
| 98 if (hasY()) | |
| 99 sourceClipRect.setY(boundaries.y()); | |
| 100 if (hasWidth()) | |
| 101 sourceClipRect.setWidth(boundaries.width()); | |
| 102 if (hasHeight()) | |
| 103 sourceClipRect.setHeight(boundaries.height()); | |
| 104 | |
| 105 FloatRect result; | |
| 106 if (m_inputEffects.size() > 0) { | |
| 107 result = m_inputEffects.at(0)->getSourceRect(sourceRect, sourceClipRect)
; | |
| 108 for (unsigned i = 1; i < m_inputEffects.size(); ++i) | |
| 109 result.unite(m_inputEffects.at(i)->getSourceRect(sourceRect, sourceC
lipRect)); | |
| 110 } else { | |
| 111 result = sourceRect; | |
| 112 result.intersect(sourceClipRect); | |
| 113 } | |
| 114 return result; | |
| 115 } | |
| 116 | |
| 117 IntRect FilterEffect::requestedRegionOfInputImageData(const IntRect& effectRect)
const | |
| 118 { | |
| 119 ASSERT(hasResult()); | |
| 120 IntPoint location = m_absolutePaintRect.location(); | |
| 121 location.moveBy(-effectRect.location()); | |
| 122 return IntRect(location, m_absolutePaintRect.size()); | |
| 123 } | |
| 124 | |
| 125 IntRect FilterEffect::drawingRegionOfInputImage(const IntRect& srcRect) const | |
| 126 { | |
| 127 return IntRect(IntPoint(srcRect.x() - m_absolutePaintRect.x(), | |
| 128 srcRect.y() - m_absolutePaintRect.y()), srcRect.size
()); | |
| 129 } | |
| 130 | |
| 131 FilterEffect* FilterEffect::inputEffect(unsigned number) const | |
| 132 { | |
| 133 ASSERT_WITH_SECURITY_IMPLICATION(number < m_inputEffects.size()); | |
| 134 return m_inputEffects.at(number).get(); | |
| 135 } | |
| 136 | |
| 137 void FilterEffect::apply() | |
| 138 { | |
| 139 if (hasResult()) | |
| 140 return; | |
| 141 unsigned size = m_inputEffects.size(); | |
| 142 for (unsigned i = 0; i < size; ++i) { | |
| 143 FilterEffect* in = m_inputEffects.at(i).get(); | |
| 144 in->apply(); | |
| 145 if (!in->hasResult()) | |
| 146 return; | |
| 147 | |
| 148 // Convert input results to the current effect's color space. | |
| 149 transformResultColorSpace(in, i); | |
| 150 } | |
| 151 | |
| 152 determineAbsolutePaintRect(); | |
| 153 setResultColorSpace(m_operatingColorSpace); | |
| 154 | |
| 155 if (!isFilterSizeValid(m_absolutePaintRect)) | |
| 156 return; | |
| 157 | |
| 158 if (requiresValidPreMultipliedPixels()) { | |
| 159 for (unsigned i = 0; i < size; ++i) | |
| 160 inputEffect(i)->correctFilterResultIfNeeded(); | |
| 161 } | |
| 162 | |
| 163 if (applySkia()) | |
| 164 return; | |
| 165 | |
| 166 applySoftware(); | |
| 167 } | |
| 168 | |
| 169 void FilterEffect::forceValidPreMultipliedPixels() | |
| 170 { | |
| 171 // Must operate on pre-multiplied results; other formats cannot have invalid
pixels. | |
| 172 if (!m_premultipliedImageResult) | |
| 173 return; | |
| 174 | |
| 175 Uint8ClampedArray* imageArray = m_premultipliedImageResult.get(); | |
| 176 unsigned char* pixelData = imageArray->data(); | |
| 177 int pixelArrayLength = imageArray->length(); | |
| 178 | |
| 179 // We must have four bytes per pixel, and complete pixels | |
| 180 ASSERT(!(pixelArrayLength % 4)); | |
| 181 | |
| 182 #if HAVE(ARM_NEON_INTRINSICS) | |
| 183 if (pixelArrayLength >= 64) { | |
| 184 unsigned char* lastPixel = pixelData + (pixelArrayLength & ~0x3f); | |
| 185 do { | |
| 186 // Increments pixelData by 64. | |
| 187 uint8x16x4_t sixteenPixels = vld4q_u8(pixelData); | |
| 188 sixteenPixels.val[0] = vminq_u8(sixteenPixels.val[0], sixteenPixels.
val[3]); | |
| 189 sixteenPixels.val[1] = vminq_u8(sixteenPixels.val[1], sixteenPixels.
val[3]); | |
| 190 sixteenPixels.val[2] = vminq_u8(sixteenPixels.val[2], sixteenPixels.
val[3]); | |
| 191 vst4q_u8(pixelData, sixteenPixels); | |
| 192 pixelData += 64; | |
| 193 } while (pixelData < lastPixel); | |
| 194 | |
| 195 pixelArrayLength &= 0x3f; | |
| 196 if (!pixelArrayLength) | |
| 197 return; | |
| 198 } | |
| 199 #endif | |
| 200 | |
| 201 int numPixels = pixelArrayLength / 4; | |
| 202 | |
| 203 // Iterate over each pixel, checking alpha and adjusting color components if
necessary | |
| 204 while (--numPixels >= 0) { | |
| 205 // Alpha is the 4th byte in a pixel | |
| 206 unsigned char a = *(pixelData + 3); | |
| 207 // Clamp each component to alpha, and increment the pixel location | |
| 208 for (int i = 0; i < 3; ++i) { | |
| 209 if (*pixelData > a) | |
| 210 *pixelData = a; | |
| 211 ++pixelData; | |
| 212 } | |
| 213 // Increment for alpha | |
| 214 ++pixelData; | |
| 215 } | |
| 216 } | |
| 217 | |
| 218 void FilterEffect::clearResult() | |
| 219 { | |
| 220 if (m_imageBufferResult) | |
| 221 m_imageBufferResult.clear(); | |
| 222 if (m_unmultipliedImageResult) | |
| 223 m_unmultipliedImageResult.clear(); | |
| 224 if (m_premultipliedImageResult) | |
| 225 m_premultipliedImageResult.clear(); | |
| 226 } | |
| 227 | |
| 228 void FilterEffect::clearResultsRecursive() | |
| 229 { | |
| 230 // Clear all results, regardless that the current effect has | |
| 231 // a result. Can be used if an effect is in an erroneous state. | |
| 232 if (hasResult()) | |
| 233 clearResult(); | |
| 234 | |
| 235 unsigned size = m_inputEffects.size(); | |
| 236 for (unsigned i = 0; i < size; ++i) | |
| 237 m_inputEffects.at(i).get()->clearResultsRecursive(); | |
| 238 } | |
| 239 | |
| 240 ImageBuffer* FilterEffect::asImageBuffer() | |
| 241 { | |
| 242 if (!hasResult()) | |
| 243 return 0; | |
| 244 if (m_imageBufferResult) | |
| 245 return m_imageBufferResult.get(); | |
| 246 m_imageBufferResult = ImageBuffer::create(m_absolutePaintRect.size(), 1, m_f
ilter->renderingMode()); | |
| 247 IntRect destinationRect(IntPoint(), m_absolutePaintRect.size()); | |
| 248 if (m_premultipliedImageResult) | |
| 249 m_imageBufferResult->putByteArray(Premultiplied, m_premultipliedImageRes
ult.get(), destinationRect.size(), destinationRect, IntPoint()); | |
| 250 else | |
| 251 m_imageBufferResult->putByteArray(Unmultiplied, m_unmultipliedImageResul
t.get(), destinationRect.size(), destinationRect, IntPoint()); | |
| 252 return m_imageBufferResult.get(); | |
| 253 } | |
| 254 | |
| 255 PassRefPtr<Uint8ClampedArray> FilterEffect::asUnmultipliedImage(const IntRect& r
ect) | |
| 256 { | |
| 257 ASSERT(isFilterSizeValid(rect)); | |
| 258 RefPtr<Uint8ClampedArray> imageData = Uint8ClampedArray::createUninitialized
(rect.width() * rect.height() * 4); | |
| 259 copyUnmultipliedImage(imageData.get(), rect); | |
| 260 return imageData.release(); | |
| 261 } | |
| 262 | |
| 263 PassRefPtr<Uint8ClampedArray> FilterEffect::asPremultipliedImage(const IntRect&
rect) | |
| 264 { | |
| 265 ASSERT(isFilterSizeValid(rect)); | |
| 266 RefPtr<Uint8ClampedArray> imageData = Uint8ClampedArray::createUninitialized
(rect.width() * rect.height() * 4); | |
| 267 copyPremultipliedImage(imageData.get(), rect); | |
| 268 return imageData.release(); | |
| 269 } | |
| 270 | |
| 271 inline void FilterEffect::copyImageBytes(Uint8ClampedArray* source, Uint8Clamped
Array* destination, const IntRect& rect) | |
| 272 { | |
| 273 // Initialize the destination to transparent black, if not entirely covered
by the source. | |
| 274 if (rect.x() < 0 || rect.y() < 0 || rect.maxX() > m_absolutePaintRect.width(
) || rect.maxY() > m_absolutePaintRect.height()) | |
| 275 memset(destination->data(), 0, destination->length()); | |
| 276 | |
| 277 // Early return if the rect does not intersect with the source. | |
| 278 if (rect.maxX() <= 0 || rect.maxY() <= 0 || rect.x() >= m_absolutePaintRect.
width() || rect.y() >= m_absolutePaintRect.height()) | |
| 279 return; | |
| 280 | |
| 281 int xOrigin = rect.x(); | |
| 282 int xDest = 0; | |
| 283 if (xOrigin < 0) { | |
| 284 xDest = -xOrigin; | |
| 285 xOrigin = 0; | |
| 286 } | |
| 287 int xEnd = rect.maxX(); | |
| 288 if (xEnd > m_absolutePaintRect.width()) | |
| 289 xEnd = m_absolutePaintRect.width(); | |
| 290 | |
| 291 int yOrigin = rect.y(); | |
| 292 int yDest = 0; | |
| 293 if (yOrigin < 0) { | |
| 294 yDest = -yOrigin; | |
| 295 yOrigin = 0; | |
| 296 } | |
| 297 int yEnd = rect.maxY(); | |
| 298 if (yEnd > m_absolutePaintRect.height()) | |
| 299 yEnd = m_absolutePaintRect.height(); | |
| 300 | |
| 301 int size = (xEnd - xOrigin) * 4; | |
| 302 int destinationScanline = rect.width() * 4; | |
| 303 int sourceScanline = m_absolutePaintRect.width() * 4; | |
| 304 unsigned char *destinationPixel = destination->data() + ((yDest * rect.width
()) + xDest) * 4; | |
| 305 unsigned char *sourcePixel = source->data() + ((yOrigin * m_absolutePaintRec
t.width()) + xOrigin) * 4; | |
| 306 | |
| 307 while (yOrigin < yEnd) { | |
| 308 memcpy(destinationPixel, sourcePixel, size); | |
| 309 destinationPixel += destinationScanline; | |
| 310 sourcePixel += sourceScanline; | |
| 311 ++yOrigin; | |
| 312 } | |
| 313 } | |
| 314 | |
| 315 void FilterEffect::copyUnmultipliedImage(Uint8ClampedArray* destination, const I
ntRect& rect) | |
| 316 { | |
| 317 ASSERT(hasResult()); | |
| 318 | |
| 319 if (!m_unmultipliedImageResult) { | |
| 320 // We prefer a conversion from the image buffer. | |
| 321 if (m_imageBufferResult) | |
| 322 m_unmultipliedImageResult = m_imageBufferResult->getUnmultipliedImag
eData(IntRect(IntPoint(), m_absolutePaintRect.size())); | |
| 323 else { | |
| 324 ASSERT(isFilterSizeValid(m_absolutePaintRect)); | |
| 325 m_unmultipliedImageResult = Uint8ClampedArray::createUninitialized(m
_absolutePaintRect.width() * m_absolutePaintRect.height() * 4); | |
| 326 unsigned char* sourceComponent = m_premultipliedImageResult->data(); | |
| 327 unsigned char* destinationComponent = m_unmultipliedImageResult->dat
a(); | |
| 328 unsigned char* end = sourceComponent + (m_absolutePaintRect.width()
* m_absolutePaintRect.height() * 4); | |
| 329 while (sourceComponent < end) { | |
| 330 int alpha = sourceComponent[3]; | |
| 331 if (alpha) { | |
| 332 destinationComponent[0] = static_cast<int>(sourceComponent[0
]) * 255 / alpha; | |
| 333 destinationComponent[1] = static_cast<int>(sourceComponent[1
]) * 255 / alpha; | |
| 334 destinationComponent[2] = static_cast<int>(sourceComponent[2
]) * 255 / alpha; | |
| 335 } else { | |
| 336 destinationComponent[0] = 0; | |
| 337 destinationComponent[1] = 0; | |
| 338 destinationComponent[2] = 0; | |
| 339 } | |
| 340 destinationComponent[3] = alpha; | |
| 341 sourceComponent += 4; | |
| 342 destinationComponent += 4; | |
| 343 } | |
| 344 } | |
| 345 } | |
| 346 copyImageBytes(m_unmultipliedImageResult.get(), destination, rect); | |
| 347 } | |
| 348 | |
| 349 void FilterEffect::copyPremultipliedImage(Uint8ClampedArray* destination, const
IntRect& rect) | |
| 350 { | |
| 351 ASSERT(hasResult()); | |
| 352 | |
| 353 if (!m_premultipliedImageResult) { | |
| 354 // We prefer a conversion from the image buffer. | |
| 355 if (m_imageBufferResult) | |
| 356 m_premultipliedImageResult = m_imageBufferResult->getPremultipliedIm
ageData(IntRect(IntPoint(), m_absolutePaintRect.size())); | |
| 357 else { | |
| 358 ASSERT(isFilterSizeValid(m_absolutePaintRect)); | |
| 359 m_premultipliedImageResult = Uint8ClampedArray::createUninitialized(
m_absolutePaintRect.width() * m_absolutePaintRect.height() * 4); | |
| 360 unsigned char* sourceComponent = m_unmultipliedImageResult->data(); | |
| 361 unsigned char* destinationComponent = m_premultipliedImageResult->da
ta(); | |
| 362 unsigned char* end = sourceComponent + (m_absolutePaintRect.width()
* m_absolutePaintRect.height() * 4); | |
| 363 while (sourceComponent < end) { | |
| 364 int alpha = sourceComponent[3]; | |
| 365 destinationComponent[0] = static_cast<int>(sourceComponent[0]) *
alpha / 255; | |
| 366 destinationComponent[1] = static_cast<int>(sourceComponent[1]) *
alpha / 255; | |
| 367 destinationComponent[2] = static_cast<int>(sourceComponent[2]) *
alpha / 255; | |
| 368 destinationComponent[3] = alpha; | |
| 369 sourceComponent += 4; | |
| 370 destinationComponent += 4; | |
| 371 } | |
| 372 } | |
| 373 } | |
| 374 copyImageBytes(m_premultipliedImageResult.get(), destination, rect); | |
| 375 } | |
| 376 | |
| 377 ImageBuffer* FilterEffect::createImageBufferResult() | |
| 378 { | |
| 379 // Only one result type is allowed. | |
| 380 ASSERT(!hasResult()); | |
| 381 if (m_absolutePaintRect.isEmpty()) | |
| 382 return 0; | |
| 383 m_imageBufferResult = ImageBuffer::create(m_absolutePaintRect.size(), 1, m_f
ilter->renderingMode()); | |
| 384 if (!m_imageBufferResult) | |
| 385 return 0; | |
| 386 ASSERT(m_imageBufferResult->context()); | |
| 387 return m_imageBufferResult.get(); | |
| 388 } | |
| 389 | |
| 390 Uint8ClampedArray* FilterEffect::createUnmultipliedImageResult() | |
| 391 { | |
| 392 // Only one result type is allowed. | |
| 393 ASSERT(!hasResult()); | |
| 394 ASSERT(isFilterSizeValid(m_absolutePaintRect)); | |
| 395 | |
| 396 if (m_absolutePaintRect.isEmpty()) | |
| 397 return 0; | |
| 398 m_unmultipliedImageResult = Uint8ClampedArray::createUninitialized(m_absolut
ePaintRect.width() * m_absolutePaintRect.height() * 4); | |
| 399 return m_unmultipliedImageResult.get(); | |
| 400 } | |
| 401 | |
| 402 Uint8ClampedArray* FilterEffect::createPremultipliedImageResult() | |
| 403 { | |
| 404 // Only one result type is allowed. | |
| 405 ASSERT(!hasResult()); | |
| 406 ASSERT(isFilterSizeValid(m_absolutePaintRect)); | |
| 407 | |
| 408 if (m_absolutePaintRect.isEmpty()) | |
| 409 return 0; | |
| 410 m_premultipliedImageResult = Uint8ClampedArray::createUninitialized(m_absolu
tePaintRect.width() * m_absolutePaintRect.height() * 4); | |
| 411 return m_premultipliedImageResult.get(); | |
| 412 } | |
| 413 | |
| 414 void FilterEffect::transformResultColorSpace(ColorSpace dstColorSpace) | |
| 415 { | |
| 416 if (!hasResult() || dstColorSpace == m_resultColorSpace) | |
| 417 return; | |
| 418 | |
| 419 // FIXME: We can avoid this potentially unnecessary ImageBuffer conversion b
y adding | |
| 420 // color space transform support for the {pre,un}multiplied arrays. | |
| 421 asImageBuffer()->transformColorSpace(m_resultColorSpace, dstColorSpace); | |
| 422 | |
| 423 m_resultColorSpace = dstColorSpace; | |
| 424 | |
| 425 if (m_unmultipliedImageResult) | |
| 426 m_unmultipliedImageResult.clear(); | |
| 427 if (m_premultipliedImageResult) | |
| 428 m_premultipliedImageResult.clear(); | |
| 429 } | |
| 430 | |
| 431 TextStream& FilterEffect::externalRepresentation(TextStream& ts, int) const | |
| 432 { | |
| 433 // FIXME: We should dump the subRegions of the filter primitives here later.
This isn't | |
| 434 // possible at the moment, because we need more detailed informations from t
he target object. | |
| 435 return ts; | |
| 436 } | |
| 437 | |
| 438 FloatRect FilterEffect::determineFilterPrimitiveSubregion(DetermineSubregionFlag
s flags) | |
| 439 { | |
| 440 ASSERT(filter()); | |
| 441 | |
| 442 // FETile, FETurbulence, FEFlood don't have input effects, take the filter r
egion as unite rect. | |
| 443 FloatRect subregion; | |
| 444 if (unsigned numberOfInputEffects = inputEffects().size()) { | |
| 445 subregion = inputEffect(0)->determineFilterPrimitiveSubregion(flags); | |
| 446 for (unsigned i = 1; i < numberOfInputEffects; ++i) | |
| 447 subregion.unite(inputEffect(i)->determineFilterPrimitiveSubregion(fl
ags)); | |
| 448 } else | |
| 449 subregion = filter()->filterRegion(); | |
| 450 | |
| 451 // After calling determineFilterPrimitiveSubregion on the target effect, res
et the subregion again for <feTile>. | |
| 452 if (filterEffectType() == FilterEffectTypeTile) | |
| 453 subregion = filter()->filterRegion(); | |
| 454 | |
| 455 if (flags & MapRectForward) | |
| 456 subregion = mapRect(subregion); | |
| 457 | |
| 458 FloatRect boundaries = effectBoundaries(); | |
| 459 if (hasX()) | |
| 460 subregion.setX(boundaries.x()); | |
| 461 if (hasY()) | |
| 462 subregion.setY(boundaries.y()); | |
| 463 if (hasWidth()) | |
| 464 subregion.setWidth(boundaries.width()); | |
| 465 if (hasHeight()) | |
| 466 subregion.setHeight(boundaries.height()); | |
| 467 | |
| 468 setFilterPrimitiveSubregion(subregion); | |
| 469 | |
| 470 FloatRect absoluteSubregion = filter()->absoluteTransform().mapRect(subregio
n); | |
| 471 FloatSize filterResolution = filter()->filterResolution(); | |
| 472 absoluteSubregion.scale(filterResolution.width(), filterResolution.height())
; | |
| 473 | |
| 474 // Clip every filter effect to the filter region. | |
| 475 if (flags & ClipToFilterRegion) { | |
| 476 FloatRect absoluteScaledFilterRegion = filter()->absoluteFilterRegion(); | |
| 477 absoluteScaledFilterRegion.scale(filterResolution.width(), filterResolut
ion.height()); | |
| 478 absoluteSubregion.intersect(absoluteScaledFilterRegion); | |
| 479 } | |
| 480 | |
| 481 setMaxEffectRect(absoluteSubregion); | |
| 482 return subregion; | |
| 483 } | |
| 484 | |
| 485 PassRefPtr<SkImageFilter> FilterEffect::createImageFilter(SkiaImageFilterBuilder
* builder) | |
| 486 { | |
| 487 return 0; | |
| 488 } | |
| 489 | |
| 490 SkImageFilter::CropRect FilterEffect::getCropRect(const FloatSize& cropOffset) c
onst | |
| 491 { | |
| 492 SkRect rect = SkRect::MakeEmpty(); | |
| 493 uint32_t flags = 0; | |
| 494 FloatRect boundaries = effectBoundaries(); | |
| 495 FloatSize resolution = filter()->filterResolution(); | |
| 496 boundaries.scale(resolution.width(), resolution.height()); | |
| 497 boundaries.move(cropOffset); | |
| 498 if (hasX()) { | |
| 499 rect.fLeft = boundaries.x(); | |
| 500 flags |= SkImageFilter::CropRect::kHasLeft_CropEdge; | |
| 501 } | |
| 502 if (hasY()) { | |
| 503 rect.fTop = boundaries.y(); | |
| 504 flags |= SkImageFilter::CropRect::kHasTop_CropEdge; | |
| 505 } | |
| 506 if (hasWidth()) { | |
| 507 rect.fRight = rect.fLeft + boundaries.width(); | |
| 508 flags |= SkImageFilter::CropRect::kHasRight_CropEdge; | |
| 509 } | |
| 510 if (hasHeight()) { | |
| 511 rect.fBottom = rect.fTop + boundaries.height(); | |
| 512 flags |= SkImageFilter::CropRect::kHasBottom_CropEdge; | |
| 513 } | |
| 514 return SkImageFilter::CropRect(rect, flags); | |
| 515 } | |
| 516 | |
| 517 } // namespace WebCore | |
| OLD | NEW |
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Chromium Code Reviews
Issue 99103006:
Moving GraphicsContext and dependencies from core to platform. (Closed)
Base URL: svn://svn.chromium.org/blink/trunk