1 /* 2 * Copyright (C) 1999 Lars Knoll (knoll (at) kde.org) 3 * (C) 1999 Antti Koivisto (koivisto (at) kde.org) 4 * (C) 2005 Allan Sandfeld Jensen (kde (at) carewolf.com) 5 * (C) 2005, 2006 Samuel Weinig (sam.weinig (at) gmail.com) 6 * Copyright (C) 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved. 7 * Copyright (C) 2010 Google Inc. All rights reserved. 8 * 9 * This library is free software; you can redistribute it and/or 10 * modify it under the terms of the GNU Library General Public 11 * License as published by the Free Software Foundation; either 12 * version 2 of the License, or (at your option) any later version. 13 * 14 * This library is distributed in the hope that it will be useful, 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 17 * Library General Public License for more details. 18 * 19 * You should have received a copy of the GNU Library General Public License 20 * along with this library; see the file COPYING.LIB. If not, write to 21 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 22 * Boston, MA 02110-1301, USA. 23 * 24 */ 25 26 #include "config.h" 27 #include "RenderBoxModelObject.h" 28 29 #include "GraphicsContext.h" 30 #include "HTMLFrameOwnerElement.h" 31 #include "HTMLNames.h" 32 #include "ImageBuffer.h" 33 #include "Path.h" 34 #include "RenderBlock.h" 35 #include "RenderInline.h" 36 #include "RenderLayer.h" 37 #include "RenderView.h" 38 #include <wtf/CurrentTime.h> 39 40 using namespace std; 41 42 namespace WebCore { 43 44 using namespace HTMLNames; 45 46 bool RenderBoxModelObject::s_wasFloating = false; 47 bool RenderBoxModelObject::s_hadLayer = false; 48 bool RenderBoxModelObject::s_layerWasSelfPainting = false; 49 50 static const double cInterpolationCutoff = 800. * 800.; 51 static const double cLowQualityTimeThreshold = 0.500; // 500 ms 52 53 typedef HashMap<const void*, IntSize> LayerSizeMap; 54 typedef HashMap<RenderBoxModelObject*, LayerSizeMap> ObjectLayerSizeMap; 55 56 // The HashMap for storing continuation pointers. 57 // An inline can be split with blocks occuring in between the inline content. 58 // When this occurs we need a pointer to the next object. We can basically be 59 // split into a sequence of inlines and blocks. The continuation will either be 60 // an anonymous block (that houses other blocks) or it will be an inline flow. 61 // <b><i><p>Hello</p></i></b>. In this example the <i> will have a block as 62 // its continuation but the <b> will just have an inline as its continuation. 63 typedef HashMap<const RenderBoxModelObject*, RenderBoxModelObject*> ContinuationMap; 64 static ContinuationMap* continuationMap = 0; 65 66 class ImageQualityController { 67 WTF_MAKE_NONCOPYABLE(ImageQualityController); WTF_MAKE_FAST_ALLOCATED; 68 public: 69 ImageQualityController(); 70 bool shouldPaintAtLowQuality(GraphicsContext*, RenderBoxModelObject*, Image*, const void* layer, const IntSize&); 71 void removeLayer(RenderBoxModelObject*, LayerSizeMap* innerMap, const void* layer); 72 void set(RenderBoxModelObject*, LayerSizeMap* innerMap, const void* layer, const IntSize&); 73 void objectDestroyed(RenderBoxModelObject*); 74 bool isEmpty() { return m_objectLayerSizeMap.isEmpty(); } 75 76 private: 77 void highQualityRepaintTimerFired(Timer<ImageQualityController>*); 78 void restartTimer(); 79 80 ObjectLayerSizeMap m_objectLayerSizeMap; 81 Timer<ImageQualityController> m_timer; 82 bool m_animatedResizeIsActive; 83 }; 84 85 ImageQualityController::ImageQualityController() 86 : m_timer(this, &ImageQualityController::highQualityRepaintTimerFired) 87 , m_animatedResizeIsActive(false) 88 { 89 } 90 91 void ImageQualityController::removeLayer(RenderBoxModelObject* object, LayerSizeMap* innerMap, const void* layer) 92 { 93 if (innerMap) { 94 innerMap->remove(layer); 95 if (innerMap->isEmpty()) 96 objectDestroyed(object); 97 } 98 } 99 100 void ImageQualityController::set(RenderBoxModelObject* object, LayerSizeMap* innerMap, const void* layer, const IntSize& size) 101 { 102 if (innerMap) 103 innerMap->set(layer, size); 104 else { 105 LayerSizeMap newInnerMap; 106 newInnerMap.set(layer, size); 107 m_objectLayerSizeMap.set(object, newInnerMap); 108 } 109 } 110 111 void ImageQualityController::objectDestroyed(RenderBoxModelObject* object) 112 { 113 m_objectLayerSizeMap.remove(object); 114 if (m_objectLayerSizeMap.isEmpty()) { 115 m_animatedResizeIsActive = false; 116 m_timer.stop(); 117 } 118 } 119 120 void ImageQualityController::highQualityRepaintTimerFired(Timer<ImageQualityController>*) 121 { 122 if (m_animatedResizeIsActive) { 123 m_animatedResizeIsActive = false; 124 for (ObjectLayerSizeMap::iterator it = m_objectLayerSizeMap.begin(); it != m_objectLayerSizeMap.end(); ++it) 125 it->first->repaint(); 126 } 127 } 128 129 void ImageQualityController::restartTimer() 130 { 131 m_timer.startOneShot(cLowQualityTimeThreshold); 132 } 133 134 bool ImageQualityController::shouldPaintAtLowQuality(GraphicsContext* context, RenderBoxModelObject* object, Image* image, const void *layer, const IntSize& size) 135 { 136 // If the image is not a bitmap image, then none of this is relevant and we just paint at high 137 // quality. 138 if (!image || !image->isBitmapImage() || context->paintingDisabled()) 139 return false; 140 141 // Make sure to use the unzoomed image size, since if a full page zoom is in effect, the image 142 // is actually being scaled. 143 IntSize imageSize(image->width(), image->height()); 144 145 // Look ourselves up in the hashtables. 146 ObjectLayerSizeMap::iterator i = m_objectLayerSizeMap.find(object); 147 LayerSizeMap* innerMap = i != m_objectLayerSizeMap.end() ? &i->second : 0; 148 IntSize oldSize; 149 bool isFirstResize = true; 150 if (innerMap) { 151 LayerSizeMap::iterator j = innerMap->find(layer); 152 if (j != innerMap->end()) { 153 isFirstResize = false; 154 oldSize = j->second; 155 } 156 } 157 158 const AffineTransform& currentTransform = context->getCTM(); 159 bool contextIsScaled = !currentTransform.isIdentityOrTranslationOrFlipped(); 160 if (!contextIsScaled && imageSize == size) { 161 // There is no scale in effect. If we had a scale in effect before, we can just remove this object from the list. 162 removeLayer(object, innerMap, layer); 163 return false; 164 } 165 166 // There is no need to hash scaled images that always use low quality mode when the page demands it. This is the iChat case. 167 if (object->document()->page()->inLowQualityImageInterpolationMode()) { 168 double totalPixels = static_cast<double>(image->width()) * static_cast<double>(image->height()); 169 if (totalPixels > cInterpolationCutoff) 170 return true; 171 } 172 173 // If an animated resize is active, paint in low quality and kick the timer ahead. 174 if (m_animatedResizeIsActive) { 175 set(object, innerMap, layer, size); 176 restartTimer(); 177 return true; 178 } 179 // If this is the first time resizing this image, or its size is the 180 // same as the last resize, draw at high res, but record the paint 181 // size and set the timer. 182 if (isFirstResize || oldSize == size) { 183 restartTimer(); 184 set(object, innerMap, layer, size); 185 return false; 186 } 187 // If the timer is no longer active, draw at high quality and don't 188 // set the timer. 189 if (!m_timer.isActive()) { 190 removeLayer(object, innerMap, layer); 191 return false; 192 } 193 // This object has been resized to two different sizes while the timer 194 // is active, so draw at low quality, set the flag for animated resizes and 195 // the object to the list for high quality redraw. 196 set(object, innerMap, layer, size); 197 m_animatedResizeIsActive = true; 198 restartTimer(); 199 return true; 200 } 201 202 static ImageQualityController* gImageQualityController = 0; 203 204 static ImageQualityController* imageQualityController() 205 { 206 if (!gImageQualityController) 207 gImageQualityController = new ImageQualityController; 208 209 return gImageQualityController; 210 } 211 212 void RenderBoxModelObject::setSelectionState(SelectionState s) 213 { 214 if (selectionState() == s) 215 return; 216 217 if (s == SelectionInside && selectionState() != SelectionNone) 218 return; 219 220 if ((s == SelectionStart && selectionState() == SelectionEnd) 221 || (s == SelectionEnd && selectionState() == SelectionStart)) 222 RenderObject::setSelectionState(SelectionBoth); 223 else 224 RenderObject::setSelectionState(s); 225 226 // FIXME: 227 // We should consider whether it is OK propagating to ancestor RenderInlines. 228 // This is a workaround for http://webkit.org/b/32123 229 RenderBlock* cb = containingBlock(); 230 if (cb && !cb->isRenderView()) 231 cb->setSelectionState(s); 232 } 233 234 bool RenderBoxModelObject::shouldPaintAtLowQuality(GraphicsContext* context, Image* image, const void* layer, const IntSize& size) 235 { 236 return imageQualityController()->shouldPaintAtLowQuality(context, this, image, layer, size); 237 } 238 239 RenderBoxModelObject::RenderBoxModelObject(Node* node) 240 : RenderObject(node) 241 , m_layer(0) 242 { 243 } 244 245 RenderBoxModelObject::~RenderBoxModelObject() 246 { 247 // Our layer should have been destroyed and cleared by now 248 ASSERT(!hasLayer()); 249 ASSERT(!m_layer); 250 if (gImageQualityController) { 251 gImageQualityController->objectDestroyed(this); 252 if (gImageQualityController->isEmpty()) { 253 delete gImageQualityController; 254 gImageQualityController = 0; 255 } 256 } 257 } 258 259 void RenderBoxModelObject::destroyLayer() 260 { 261 ASSERT(!hasLayer()); // Callers should have already called setHasLayer(false) 262 ASSERT(m_layer); 263 m_layer->destroy(renderArena()); 264 m_layer = 0; 265 } 266 267 void RenderBoxModelObject::destroy() 268 { 269 // This must be done before we destroy the RenderObject. 270 if (m_layer) 271 m_layer->clearClipRects(); 272 273 // A continuation of this RenderObject should be destroyed at subclasses. 274 ASSERT(!continuation()); 275 276 // RenderObject::destroy calls back to destroyLayer() for layer destruction 277 RenderObject::destroy(); 278 } 279 280 bool RenderBoxModelObject::hasSelfPaintingLayer() const 281 { 282 return m_layer && m_layer->isSelfPaintingLayer(); 283 } 284 285 void RenderBoxModelObject::styleWillChange(StyleDifference diff, const RenderStyle* newStyle) 286 { 287 s_wasFloating = isFloating(); 288 s_hadLayer = hasLayer(); 289 if (s_hadLayer) 290 s_layerWasSelfPainting = layer()->isSelfPaintingLayer(); 291 292 // If our z-index changes value or our visibility changes, 293 // we need to dirty our stacking context's z-order list. 294 if (style() && newStyle) { 295 if (parent()) { 296 // Do a repaint with the old style first, e.g., for example if we go from 297 // having an outline to not having an outline. 298 if (diff == StyleDifferenceRepaintLayer) { 299 layer()->repaintIncludingDescendants(); 300 if (!(style()->clip() == newStyle->clip())) 301 layer()->clearClipRectsIncludingDescendants(); 302 } else if (diff == StyleDifferenceRepaint || newStyle->outlineSize() < style()->outlineSize()) 303 repaint(); 304 } 305 306 if (diff == StyleDifferenceLayout || diff == StyleDifferenceSimplifiedLayout) { 307 // When a layout hint happens, we go ahead and do a repaint of the layer, since the layer could 308 // end up being destroyed. 309 if (hasLayer()) { 310 if (style()->position() != newStyle->position() || 311 style()->zIndex() != newStyle->zIndex() || 312 style()->hasAutoZIndex() != newStyle->hasAutoZIndex() || 313 !(style()->clip() == newStyle->clip()) || 314 style()->hasClip() != newStyle->hasClip() || 315 style()->opacity() != newStyle->opacity() || 316 style()->transform() != newStyle->transform()) 317 layer()->repaintIncludingDescendants(); 318 } else if (newStyle->hasTransform() || newStyle->opacity() < 1) { 319 // If we don't have a layer yet, but we are going to get one because of transform or opacity, 320 // then we need to repaint the old position of the object. 321 repaint(); 322 } 323 } 324 325 if (hasLayer() && (style()->hasAutoZIndex() != newStyle->hasAutoZIndex() || 326 style()->zIndex() != newStyle->zIndex() || 327 style()->visibility() != newStyle->visibility())) { 328 layer()->dirtyStackingContextZOrderLists(); 329 if (style()->hasAutoZIndex() != newStyle->hasAutoZIndex() || style()->visibility() != newStyle->visibility()) 330 layer()->dirtyZOrderLists(); 331 } 332 } 333 334 RenderObject::styleWillChange(diff, newStyle); 335 } 336 337 void RenderBoxModelObject::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle) 338 { 339 RenderObject::styleDidChange(diff, oldStyle); 340 updateBoxModelInfoFromStyle(); 341 342 if (requiresLayer()) { 343 if (!layer()) { 344 if (s_wasFloating && isFloating()) 345 setChildNeedsLayout(true); 346 m_layer = new (renderArena()) RenderLayer(this); 347 setHasLayer(true); 348 m_layer->insertOnlyThisLayer(); 349 if (parent() && !needsLayout() && containingBlock()) { 350 m_layer->setNeedsFullRepaint(); 351 m_layer->updateLayerPositions(); 352 } 353 } 354 } else if (layer() && layer()->parent()) { 355 setHasTransform(false); // Either a transform wasn't specified or the object doesn't support transforms, so just null out the bit. 356 setHasReflection(false); 357 m_layer->removeOnlyThisLayer(); // calls destroyLayer() which clears m_layer 358 if (s_wasFloating && isFloating()) 359 setChildNeedsLayout(true); 360 } 361 362 if (layer()) { 363 layer()->styleChanged(diff, oldStyle); 364 if (s_hadLayer && layer()->isSelfPaintingLayer() != s_layerWasSelfPainting) 365 setChildNeedsLayout(true); 366 } 367 } 368 369 void RenderBoxModelObject::updateBoxModelInfoFromStyle() 370 { 371 // Set the appropriate bits for a box model object. Since all bits are cleared in styleWillChange, 372 // we only check for bits that could possibly be set to true. 373 setHasBoxDecorations(hasBackground() || style()->hasBorder() || style()->hasAppearance() || style()->boxShadow()); 374 setInline(style()->isDisplayInlineType()); 375 setRelPositioned(style()->position() == RelativePosition); 376 setHorizontalWritingMode(style()->isHorizontalWritingMode()); 377 } 378 379 int RenderBoxModelObject::relativePositionOffsetX() const 380 { 381 // Objects that shrink to avoid floats normally use available line width when computing containing block width. However 382 // in the case of relative positioning using percentages, we can't do this. The offset should always be resolved using the 383 // available width of the containing block. Therefore we don't use containingBlockLogicalWidthForContent() here, but instead explicitly 384 // call availableWidth on our containing block. 385 if (!style()->left().isAuto()) { 386 RenderBlock* cb = containingBlock(); 387 if (!style()->right().isAuto() && !cb->style()->isLeftToRightDirection()) 388 return -style()->right().calcValue(cb->availableWidth()); 389 return style()->left().calcValue(cb->availableWidth()); 390 } 391 if (!style()->right().isAuto()) { 392 RenderBlock* cb = containingBlock(); 393 return -style()->right().calcValue(cb->availableWidth()); 394 } 395 return 0; 396 } 397 398 int RenderBoxModelObject::relativePositionOffsetY() const 399 { 400 RenderBlock* containingBlock = this->containingBlock(); 401 402 // If the containing block of a relatively positioned element does not 403 // specify a height, a percentage top or bottom offset should be resolved as 404 // auto. An exception to this is if the containing block has the WinIE quirk 405 // where <html> and <body> assume the size of the viewport. In this case, 406 // calculate the percent offset based on this height. 407 // See <https://bugs.webkit.org/show_bug.cgi?id=26396>. 408 if (!style()->top().isAuto() 409 && (!containingBlock->style()->height().isAuto() 410 || !style()->top().isPercent() 411 || containingBlock->stretchesToViewport())) 412 return style()->top().calcValue(containingBlock->availableHeight()); 413 414 if (!style()->bottom().isAuto() 415 && (!containingBlock->style()->height().isAuto() 416 || !style()->bottom().isPercent() 417 || containingBlock->stretchesToViewport())) 418 return -style()->bottom().calcValue(containingBlock->availableHeight()); 419 420 return 0; 421 } 422 423 int RenderBoxModelObject::offsetLeft() const 424 { 425 // If the element is the HTML body element or does not have an associated box 426 // return 0 and stop this algorithm. 427 if (isBody()) 428 return 0; 429 430 RenderBoxModelObject* offsetPar = offsetParent(); 431 int xPos = (isBox() ? toRenderBox(this)->x() : 0); 432 433 // If the offsetParent of the element is null, or is the HTML body element, 434 // return the distance between the canvas origin and the left border edge 435 // of the element and stop this algorithm. 436 if (offsetPar) { 437 if (offsetPar->isBox() && !offsetPar->isBody()) 438 xPos -= toRenderBox(offsetPar)->borderLeft(); 439 if (!isPositioned()) { 440 if (isRelPositioned()) 441 xPos += relativePositionOffsetX(); 442 RenderObject* curr = parent(); 443 while (curr && curr != offsetPar) { 444 // FIXME: What are we supposed to do inside SVG content? 445 if (curr->isBox() && !curr->isTableRow()) 446 xPos += toRenderBox(curr)->x(); 447 curr = curr->parent(); 448 } 449 if (offsetPar->isBox() && offsetPar->isBody() && !offsetPar->isRelPositioned() && !offsetPar->isPositioned()) 450 xPos += toRenderBox(offsetPar)->x(); 451 } 452 } 453 454 return xPos; 455 } 456 457 int RenderBoxModelObject::offsetTop() const 458 { 459 // If the element is the HTML body element or does not have an associated box 460 // return 0 and stop this algorithm. 461 if (isBody()) 462 return 0; 463 464 RenderBoxModelObject* offsetPar = offsetParent(); 465 int yPos = (isBox() ? toRenderBox(this)->y() : 0); 466 467 // If the offsetParent of the element is null, or is the HTML body element, 468 // return the distance between the canvas origin and the top border edge 469 // of the element and stop this algorithm. 470 if (offsetPar) { 471 if (offsetPar->isBox() && !offsetPar->isBody()) 472 yPos -= toRenderBox(offsetPar)->borderTop(); 473 if (!isPositioned()) { 474 if (isRelPositioned()) 475 yPos += relativePositionOffsetY(); 476 RenderObject* curr = parent(); 477 while (curr && curr != offsetPar) { 478 // FIXME: What are we supposed to do inside SVG content? 479 if (curr->isBox() && !curr->isTableRow()) 480 yPos += toRenderBox(curr)->y(); 481 curr = curr->parent(); 482 } 483 if (offsetPar->isBox() && offsetPar->isBody() && !offsetPar->isRelPositioned() && !offsetPar->isPositioned()) 484 yPos += toRenderBox(offsetPar)->y(); 485 } 486 } 487 return yPos; 488 } 489 490 int RenderBoxModelObject::paddingTop(bool) const 491 { 492 int w = 0; 493 Length padding = style()->paddingTop(); 494 if (padding.isPercent()) 495 w = containingBlock()->availableLogicalWidth(); 496 return padding.calcMinValue(w); 497 } 498 499 int RenderBoxModelObject::paddingBottom(bool) const 500 { 501 int w = 0; 502 Length padding = style()->paddingBottom(); 503 if (padding.isPercent()) 504 w = containingBlock()->availableLogicalWidth(); 505 return padding.calcMinValue(w); 506 } 507 508 int RenderBoxModelObject::paddingLeft(bool) const 509 { 510 int w = 0; 511 Length padding = style()->paddingLeft(); 512 if (padding.isPercent()) 513 w = containingBlock()->availableLogicalWidth(); 514 return padding.calcMinValue(w); 515 } 516 517 int RenderBoxModelObject::paddingRight(bool) const 518 { 519 int w = 0; 520 Length padding = style()->paddingRight(); 521 if (padding.isPercent()) 522 w = containingBlock()->availableLogicalWidth(); 523 return padding.calcMinValue(w); 524 } 525 526 int RenderBoxModelObject::paddingBefore(bool) const 527 { 528 int w = 0; 529 Length padding = style()->paddingBefore(); 530 if (padding.isPercent()) 531 w = containingBlock()->availableLogicalWidth(); 532 return padding.calcMinValue(w); 533 } 534 535 int RenderBoxModelObject::paddingAfter(bool) const 536 { 537 int w = 0; 538 Length padding = style()->paddingAfter(); 539 if (padding.isPercent()) 540 w = containingBlock()->availableLogicalWidth(); 541 return padding.calcMinValue(w); 542 } 543 544 int RenderBoxModelObject::paddingStart(bool) const 545 { 546 int w = 0; 547 Length padding = style()->paddingStart(); 548 if (padding.isPercent()) 549 w = containingBlock()->availableLogicalWidth(); 550 return padding.calcMinValue(w); 551 } 552 553 int RenderBoxModelObject::paddingEnd(bool) const 554 { 555 int w = 0; 556 Length padding = style()->paddingEnd(); 557 if (padding.isPercent()) 558 w = containingBlock()->availableLogicalWidth(); 559 return padding.calcMinValue(w); 560 } 561 562 RoundedIntRect RenderBoxModelObject::getBackgroundRoundedRect(const IntRect& borderRect, InlineFlowBox* box, int inlineBoxWidth, int inlineBoxHeight, 563 bool includeLogicalLeftEdge, bool includeLogicalRightEdge) 564 { 565 RoundedIntRect border = style()->getRoundedBorderFor(borderRect, includeLogicalLeftEdge, includeLogicalRightEdge); 566 if (box && (box->nextLineBox() || box->prevLineBox())) { 567 RoundedIntRect segmentBorder = style()->getRoundedBorderFor(IntRect(0, 0, inlineBoxWidth, inlineBoxHeight), includeLogicalLeftEdge, includeLogicalRightEdge); 568 border.setRadii(segmentBorder.radii()); 569 } 570 571 return border; 572 } 573 574 void RenderBoxModelObject::paintFillLayerExtended(const PaintInfo& paintInfo, const Color& color, const FillLayer* bgLayer, int tx, int ty, int w, int h, 575 InlineFlowBox* box, int inlineBoxWidth, int inlineBoxHeight, CompositeOperator op, RenderObject* backgroundObject) 576 { 577 GraphicsContext* context = paintInfo.context; 578 if (context->paintingDisabled()) 579 return; 580 581 bool includeLeftEdge = box ? box->includeLogicalLeftEdge() : true; 582 bool includeRightEdge = box ? box->includeLogicalRightEdge() : true; 583 584 bool hasRoundedBorder = style()->hasBorderRadius() && (includeLeftEdge || includeRightEdge); 585 bool clippedWithLocalScrolling = hasOverflowClip() && bgLayer->attachment() == LocalBackgroundAttachment; 586 bool isBorderFill = bgLayer->clip() == BorderFillBox; 587 bool isRoot = this->isRoot(); 588 589 Color bgColor = color; 590 StyleImage* bgImage = bgLayer->image(); 591 bool shouldPaintBackgroundImage = bgImage && bgImage->canRender(style()->effectiveZoom()); 592 593 // When this style flag is set, change existing background colors and images to a solid white background. 594 // If there's no bg color or image, leave it untouched to avoid affecting transparency. 595 // We don't try to avoid loading the background images, because this style flag is only set 596 // when printing, and at that point we've already loaded the background images anyway. (To avoid 597 // loading the background images we'd have to do this check when applying styles rather than 598 // while rendering.) 599 if (style()->forceBackgroundsToWhite()) { 600 // Note that we can't reuse this variable below because the bgColor might be changed 601 bool shouldPaintBackgroundColor = !bgLayer->next() && bgColor.isValid() && bgColor.alpha() > 0; 602 if (shouldPaintBackgroundImage || shouldPaintBackgroundColor) { 603 bgColor = Color::white; 604 shouldPaintBackgroundImage = false; 605 } 606 } 607 608 bool colorVisible = bgColor.isValid() && bgColor.alpha() > 0; 609 610 // Fast path for drawing simple color backgrounds. 611 if (!isRoot && !clippedWithLocalScrolling && !shouldPaintBackgroundImage && isBorderFill) { 612 if (!colorVisible) 613 return; 614 615 IntRect borderRect(tx, ty, w, h); 616 if (borderRect.isEmpty()) 617 return; 618 619 if (hasRoundedBorder) { 620 RoundedIntRect border = getBackgroundRoundedRect(borderRect, box, inlineBoxWidth, inlineBoxHeight, includeLeftEdge, includeRightEdge); 621 context->fillRoundedRect(border, bgColor, style()->colorSpace()); 622 } else 623 context->fillRect(borderRect, bgColor, style()->colorSpace()); 624 625 return; 626 } 627 628 bool clippedToBorderRadius = false; 629 if (hasRoundedBorder) { 630 IntRect borderRect(tx, ty, w, h); 631 632 if (borderRect.isEmpty()) 633 return; 634 635 context->save(); 636 637 RoundedIntRect border = getBackgroundRoundedRect(borderRect, box, inlineBoxWidth, inlineBoxHeight, includeLeftEdge, includeRightEdge); 638 context->addRoundedRectClip(border); 639 clippedToBorderRadius = true; 640 } 641 642 int bLeft = includeLeftEdge ? borderLeft() : 0; 643 int bRight = includeRightEdge ? borderRight() : 0; 644 int pLeft = includeLeftEdge ? paddingLeft() : 0; 645 int pRight = includeRightEdge ? paddingRight() : 0; 646 647 if (clippedWithLocalScrolling) { 648 // Clip to the overflow area. 649 context->save(); 650 context->clip(toRenderBox(this)->overflowClipRect(tx, ty)); 651 652 // Now adjust our tx, ty, w, h to reflect a scrolled content box with borders at the ends. 653 IntSize offset = layer()->scrolledContentOffset(); 654 tx -= offset.width(); 655 ty -= offset.height(); 656 w = bLeft + layer()->scrollWidth() + bRight; 657 h = borderTop() + layer()->scrollHeight() + borderBottom(); 658 } 659 660 if (bgLayer->clip() == PaddingFillBox || bgLayer->clip() == ContentFillBox) { 661 // Clip to the padding or content boxes as necessary. 662 bool includePadding = bgLayer->clip() == ContentFillBox; 663 int x = tx + bLeft + (includePadding ? pLeft : 0); 664 int y = ty + borderTop() + (includePadding ? paddingTop() : 0); 665 int width = w - bLeft - bRight - (includePadding ? pLeft + pRight : 0); 666 int height = h - borderTop() - borderBottom() - (includePadding ? paddingTop() + paddingBottom() : 0); 667 context->save(); 668 context->clip(IntRect(x, y, width, height)); 669 } else if (bgLayer->clip() == TextFillBox) { 670 // We have to draw our text into a mask that can then be used to clip background drawing. 671 // First figure out how big the mask has to be. It should be no bigger than what we need 672 // to actually render, so we should intersect the dirty rect with the border box of the background. 673 IntRect maskRect(tx, ty, w, h); 674 maskRect.intersect(paintInfo.rect); 675 676 // Now create the mask. 677 OwnPtr<ImageBuffer> maskImage = ImageBuffer::create(maskRect.size()); 678 if (!maskImage) 679 return; 680 681 GraphicsContext* maskImageContext = maskImage->context(); 682 maskImageContext->translate(-maskRect.x(), -maskRect.y()); 683 684 // Now add the text to the clip. We do this by painting using a special paint phase that signals to 685 // InlineTextBoxes that they should just add their contents to the clip. 686 PaintInfo info(maskImageContext, maskRect, PaintPhaseTextClip, true, 0, 0); 687 if (box) { 688 RootInlineBox* root = box->root(); 689 box->paint(info, tx - box->x(), ty - box->y(), root->lineTop(), root->lineBottom()); 690 } else { 691 int x = isBox() ? toRenderBox(this)->x() : 0; 692 int y = isBox() ? toRenderBox(this)->y() : 0; 693 paint(info, tx - x, ty - y); 694 } 695 696 // The mask has been created. Now we just need to clip to it. 697 context->save(); 698 context->clipToImageBuffer(maskImage.get(), maskRect); 699 } 700 701 // Only fill with a base color (e.g., white) if we're the root document, since iframes/frames with 702 // no background in the child document should show the parent's background. 703 bool isOpaqueRoot = false; 704 if (isRoot) { 705 isOpaqueRoot = true; 706 if (!bgLayer->next() && !(bgColor.isValid() && bgColor.alpha() == 255) && view()->frameView()) { 707 Element* ownerElement = document()->ownerElement(); 708 if (ownerElement) { 709 if (!ownerElement->hasTagName(frameTag)) { 710 // Locate the <body> element using the DOM. This is easier than trying 711 // to crawl around a render tree with potential :before/:after content and 712 // anonymous blocks created by inline <body> tags etc. We can locate the <body> 713 // render object very easily via the DOM. 714 HTMLElement* body = document()->body(); 715 if (body) { 716 // Can't scroll a frameset document anyway. 717 isOpaqueRoot = body->hasLocalName(framesetTag); 718 } 719 #if ENABLE(SVG) 720 else { 721 // SVG documents and XML documents with SVG root nodes are transparent. 722 isOpaqueRoot = !document()->hasSVGRootNode(); 723 } 724 #endif 725 } 726 } else 727 isOpaqueRoot = !view()->frameView()->isTransparent(); 728 } 729 view()->frameView()->setContentIsOpaque(isOpaqueRoot); 730 } 731 732 // Paint the color first underneath all images. 733 if (!bgLayer->next()) { 734 IntRect rect(tx, ty, w, h); 735 rect.intersect(paintInfo.rect); 736 // If we have an alpha and we are painting the root element, go ahead and blend with the base background color. 737 if (isOpaqueRoot) { 738 Color baseColor = view()->frameView()->baseBackgroundColor(); 739 if (baseColor.alpha() > 0) { 740 CompositeOperator previousOperator = context->compositeOperation(); 741 context->setCompositeOperation(CompositeCopy); 742 context->fillRect(rect, baseColor, style()->colorSpace()); 743 context->setCompositeOperation(previousOperator); 744 } else 745 context->clearRect(rect); 746 } 747 748 if (bgColor.isValid() && bgColor.alpha() > 0) 749 context->fillRect(rect, bgColor, style()->colorSpace()); 750 } 751 752 // no progressive loading of the background image 753 if (shouldPaintBackgroundImage) { 754 IntRect destRect; 755 IntPoint phase; 756 IntSize tileSize; 757 758 calculateBackgroundImageGeometry(bgLayer, tx, ty, w, h, destRect, phase, tileSize); 759 IntPoint destOrigin = destRect.location(); 760 destRect.intersect(paintInfo.rect); 761 if (!destRect.isEmpty()) { 762 phase += destRect.location() - destOrigin; 763 CompositeOperator compositeOp = op == CompositeSourceOver ? bgLayer->composite() : op; 764 RenderObject* clientForBackgroundImage = backgroundObject ? backgroundObject : this; 765 RefPtr<Image> image = bgImage->image(clientForBackgroundImage, tileSize); 766 bool useLowQualityScaling = shouldPaintAtLowQuality(context, image.get(), bgLayer, tileSize); 767 context->drawTiledImage(image.get(), style()->colorSpace(), destRect, phase, tileSize, compositeOp, useLowQualityScaling); 768 } 769 } 770 771 if (!isBorderFill) // Undo the background clip 772 context->restore(); 773 774 if (clippedToBorderRadius) // Undo the border radius clip 775 context->restore(); 776 777 if (clippedWithLocalScrolling) // Undo the clip for local background attachments. 778 context->restore(); 779 } 780 781 IntSize RenderBoxModelObject::calculateFillTileSize(const FillLayer* fillLayer, IntSize positioningAreaSize) const 782 { 783 StyleImage* image = fillLayer->image(); 784 image->setImageContainerSize(positioningAreaSize); // Use the box established by background-origin. 785 786 EFillSizeType type = fillLayer->size().type; 787 788 switch (type) { 789 case SizeLength: { 790 int w = positioningAreaSize.width(); 791 int h = positioningAreaSize.height(); 792 793 Length layerWidth = fillLayer->size().size.width(); 794 Length layerHeight = fillLayer->size().size.height(); 795 796 if (layerWidth.isFixed()) 797 w = layerWidth.value(); 798 else if (layerWidth.isPercent()) 799 w = layerWidth.calcValue(positioningAreaSize.width()); 800 801 if (layerHeight.isFixed()) 802 h = layerHeight.value(); 803 else if (layerHeight.isPercent()) 804 h = layerHeight.calcValue(positioningAreaSize.height()); 805 806 // If one of the values is auto we have to use the appropriate 807 // scale to maintain our aspect ratio. 808 if (layerWidth.isAuto() && !layerHeight.isAuto()) { 809 IntSize imageIntrinsicSize = image->imageSize(this, style()->effectiveZoom()); 810 if (imageIntrinsicSize.height()) 811 w = imageIntrinsicSize.width() * h / imageIntrinsicSize.height(); 812 } else if (!layerWidth.isAuto() && layerHeight.isAuto()) { 813 IntSize imageIntrinsicSize = image->imageSize(this, style()->effectiveZoom()); 814 if (imageIntrinsicSize.width()) 815 h = imageIntrinsicSize.height() * w / imageIntrinsicSize.width(); 816 } else if (layerWidth.isAuto() && layerHeight.isAuto()) { 817 // If both width and height are auto, use the image's intrinsic size. 818 IntSize imageIntrinsicSize = image->imageSize(this, style()->effectiveZoom()); 819 w = imageIntrinsicSize.width(); 820 h = imageIntrinsicSize.height(); 821 } 822 823 return IntSize(max(1, w), max(1, h)); 824 } 825 case Contain: 826 case Cover: { 827 IntSize imageIntrinsicSize = image->imageSize(this, 1); 828 float horizontalScaleFactor = imageIntrinsicSize.width() 829 ? static_cast<float>(positioningAreaSize.width()) / imageIntrinsicSize.width() : 1; 830 float verticalScaleFactor = imageIntrinsicSize.height() 831 ? static_cast<float>(positioningAreaSize.height()) / imageIntrinsicSize.height() : 1; 832 float scaleFactor = type == Contain ? min(horizontalScaleFactor, verticalScaleFactor) : max(horizontalScaleFactor, verticalScaleFactor); 833 return IntSize(max<int>(1, imageIntrinsicSize.width() * scaleFactor), max<int>(1, imageIntrinsicSize.height() * scaleFactor)); 834 } 835 case SizeNone: 836 break; 837 } 838 839 return image->imageSize(this, style()->effectiveZoom()); 840 } 841 842 void RenderBoxModelObject::calculateBackgroundImageGeometry(const FillLayer* fillLayer, int tx, int ty, int w, int h, 843 IntRect& destRect, IntPoint& phase, IntSize& tileSize) 844 { 845 int left = 0; 846 int top = 0; 847 IntSize positioningAreaSize; 848 849 // Determine the background positioning area and set destRect to the background painting area. 850 // destRect will be adjusted later if the background is non-repeating. 851 bool fixedAttachment = fillLayer->attachment() == FixedBackgroundAttachment; 852 853 #if ENABLE(FAST_MOBILE_SCROLLING) 854 if (view()->frameView() && view()->frameView()->canBlitOnScroll()) { 855 // As a side effect of an optimization to blit on scroll, we do not honor the CSS 856 // property "background-attachment: fixed" because it may result in rendering 857 // artifacts. Note, these artifacts only appear if we are blitting on scroll of 858 // a page that has fixed background images. 859 fixedAttachment = false; 860 } 861 #endif 862 863 if (!fixedAttachment) { 864 destRect = IntRect(tx, ty, w, h); 865 866 int right = 0; 867 int bottom = 0; 868 // Scroll and Local. 869 if (fillLayer->origin() != BorderFillBox) { 870 left = borderLeft(); 871 right = borderRight(); 872 top = borderTop(); 873 bottom = borderBottom(); 874 if (fillLayer->origin() == ContentFillBox) { 875 left += paddingLeft(); 876 right += paddingRight(); 877 top += paddingTop(); 878 bottom += paddingBottom(); 879 } 880 } 881 882 // The background of the box generated by the root element covers the entire canvas including 883 // its margins. Since those were added in already, we have to factor them out when computing 884 // the background positioning area. 885 if (isRoot()) { 886 positioningAreaSize = IntSize(toRenderBox(this)->width() - left - right, toRenderBox(this)->height() - top - bottom); 887 left += marginLeft(); 888 top += marginTop(); 889 } else 890 positioningAreaSize = IntSize(w - left - right, h - top - bottom); 891 } else { 892 destRect = viewRect(); 893 positioningAreaSize = destRect.size(); 894 } 895 896 tileSize = calculateFillTileSize(fillLayer, positioningAreaSize); 897 898 EFillRepeat backgroundRepeatX = fillLayer->repeatX(); 899 EFillRepeat backgroundRepeatY = fillLayer->repeatY(); 900 901 int xPosition = fillLayer->xPosition().calcMinValue(positioningAreaSize.width() - tileSize.width(), true); 902 if (backgroundRepeatX == RepeatFill) 903 phase.setX(tileSize.width() ? tileSize.width() - (xPosition + left) % tileSize.width() : 0); 904 else { 905 destRect.move(max(xPosition + left, 0), 0); 906 phase.setX(-min(xPosition + left, 0)); 907 destRect.setWidth(tileSize.width() + min(xPosition + left, 0)); 908 } 909 910 int yPosition = fillLayer->yPosition().calcMinValue(positioningAreaSize.height() - tileSize.height(), true); 911 if (backgroundRepeatY == RepeatFill) 912 phase.setY(tileSize.height() ? tileSize.height() - (yPosition + top) % tileSize.height() : 0); 913 else { 914 destRect.move(0, max(yPosition + top, 0)); 915 phase.setY(-min(yPosition + top, 0)); 916 destRect.setHeight(tileSize.height() + min(yPosition + top, 0)); 917 } 918 919 if (fixedAttachment) 920 phase.move(max(tx - destRect.x(), 0), max(ty - destRect.y(), 0)); 921 922 destRect.intersect(IntRect(tx, ty, w, h)); 923 } 924 925 bool RenderBoxModelObject::paintNinePieceImage(GraphicsContext* graphicsContext, int tx, int ty, int w, int h, const RenderStyle* style, 926 const NinePieceImage& ninePieceImage, CompositeOperator op) 927 { 928 StyleImage* styleImage = ninePieceImage.image(); 929 if (!styleImage) 930 return false; 931 932 if (!styleImage->isLoaded()) 933 return true; // Never paint a nine-piece image incrementally, but don't paint the fallback borders either. 934 935 if (!styleImage->canRender(style->effectiveZoom())) 936 return false; 937 938 // FIXME: border-image is broken with full page zooming when tiling has to happen, since the tiling function 939 // doesn't have any understanding of the zoom that is in effect on the tile. 940 styleImage->setImageContainerSize(IntSize(w, h)); 941 IntSize imageSize = styleImage->imageSize(this, 1.0f); 942 int imageWidth = imageSize.width(); 943 int imageHeight = imageSize.height(); 944 945 int topSlice = min(imageHeight, ninePieceImage.slices().top().calcValue(imageHeight)); 946 int bottomSlice = min(imageHeight, ninePieceImage.slices().bottom().calcValue(imageHeight)); 947 int leftSlice = min(imageWidth, ninePieceImage.slices().left().calcValue(imageWidth)); 948 int rightSlice = min(imageWidth, ninePieceImage.slices().right().calcValue(imageWidth)); 949 950 ENinePieceImageRule hRule = ninePieceImage.horizontalRule(); 951 ENinePieceImageRule vRule = ninePieceImage.verticalRule(); 952 953 bool fitToBorder = style->borderImage() == ninePieceImage; 954 955 int leftWidth = fitToBorder ? style->borderLeftWidth() : leftSlice; 956 int topWidth = fitToBorder ? style->borderTopWidth() : topSlice; 957 int rightWidth = fitToBorder ? style->borderRightWidth() : rightSlice; 958 int bottomWidth = fitToBorder ? style->borderBottomWidth() : bottomSlice; 959 960 bool drawLeft = leftSlice > 0 && leftWidth > 0; 961 bool drawTop = topSlice > 0 && topWidth > 0; 962 bool drawRight = rightSlice > 0 && rightWidth > 0; 963 bool drawBottom = bottomSlice > 0 && bottomWidth > 0; 964 bool drawMiddle = (imageWidth - leftSlice - rightSlice) > 0 && (w - leftWidth - rightWidth) > 0 && 965 (imageHeight - topSlice - bottomSlice) > 0 && (h - topWidth - bottomWidth) > 0; 966 967 RefPtr<Image> image = styleImage->image(this, imageSize); 968 ColorSpace colorSpace = style->colorSpace(); 969 970 if (drawLeft) { 971 // Paint the top and bottom left corners. 972 973 // The top left corner rect is (tx, ty, leftWidth, topWidth) 974 // The rect to use from within the image is obtained from our slice, and is (0, 0, leftSlice, topSlice) 975 if (drawTop) 976 graphicsContext->drawImage(image.get(), colorSpace, IntRect(tx, ty, leftWidth, topWidth), 977 IntRect(0, 0, leftSlice, topSlice), op); 978 979 // The bottom left corner rect is (tx, ty + h - bottomWidth, leftWidth, bottomWidth) 980 // The rect to use from within the image is (0, imageHeight - bottomSlice, leftSlice, botomSlice) 981 if (drawBottom) 982 graphicsContext->drawImage(image.get(), colorSpace, IntRect(tx, ty + h - bottomWidth, leftWidth, bottomWidth), 983 IntRect(0, imageHeight - bottomSlice, leftSlice, bottomSlice), op); 984 985 // Paint the left edge. 986 // Have to scale and tile into the border rect. 987 graphicsContext->drawTiledImage(image.get(), colorSpace, IntRect(tx, ty + topWidth, leftWidth, 988 h - topWidth - bottomWidth), 989 IntRect(0, topSlice, leftSlice, imageHeight - topSlice - bottomSlice), 990 Image::StretchTile, (Image::TileRule)vRule, op); 991 } 992 993 if (drawRight) { 994 // Paint the top and bottom right corners 995 // The top right corner rect is (tx + w - rightWidth, ty, rightWidth, topWidth) 996 // The rect to use from within the image is obtained from our slice, and is (imageWidth - rightSlice, 0, rightSlice, topSlice) 997 if (drawTop) 998 graphicsContext->drawImage(image.get(), colorSpace, IntRect(tx + w - rightWidth, ty, rightWidth, topWidth), 999 IntRect(imageWidth - rightSlice, 0, rightSlice, topSlice), op); 1000 1001 // The bottom right corner rect is (tx + w - rightWidth, ty + h - bottomWidth, rightWidth, bottomWidth) 1002 // The rect to use from within the image is (imageWidth - rightSlice, imageHeight - bottomSlice, rightSlice, bottomSlice) 1003 if (drawBottom) 1004 graphicsContext->drawImage(image.get(), colorSpace, IntRect(tx + w - rightWidth, ty + h - bottomWidth, rightWidth, bottomWidth), 1005 IntRect(imageWidth - rightSlice, imageHeight - bottomSlice, rightSlice, bottomSlice), op); 1006 1007 // Paint the right edge. 1008 graphicsContext->drawTiledImage(image.get(), colorSpace, IntRect(tx + w - rightWidth, ty + topWidth, rightWidth, 1009 h - topWidth - bottomWidth), 1010 IntRect(imageWidth - rightSlice, topSlice, rightSlice, imageHeight - topSlice - bottomSlice), 1011 Image::StretchTile, (Image::TileRule)vRule, op); 1012 } 1013 1014 // Paint the top edge. 1015 if (drawTop) 1016 graphicsContext->drawTiledImage(image.get(), colorSpace, IntRect(tx + leftWidth, ty, w - leftWidth - rightWidth, topWidth), 1017 IntRect(leftSlice, 0, imageWidth - rightSlice - leftSlice, topSlice), 1018 (Image::TileRule)hRule, Image::StretchTile, op); 1019 1020 // Paint the bottom edge. 1021 if (drawBottom) 1022 graphicsContext->drawTiledImage(image.get(), colorSpace, IntRect(tx + leftWidth, ty + h - bottomWidth, 1023 w - leftWidth - rightWidth, bottomWidth), 1024 IntRect(leftSlice, imageHeight - bottomSlice, imageWidth - rightSlice - leftSlice, bottomSlice), 1025 (Image::TileRule)hRule, Image::StretchTile, op); 1026 1027 // Paint the middle. 1028 if (drawMiddle) 1029 graphicsContext->drawTiledImage(image.get(), colorSpace, IntRect(tx + leftWidth, ty + topWidth, w - leftWidth - rightWidth, 1030 h - topWidth - bottomWidth), 1031 IntRect(leftSlice, topSlice, imageWidth - rightSlice - leftSlice, imageHeight - topSlice - bottomSlice), 1032 (Image::TileRule)hRule, (Image::TileRule)vRule, op); 1033 1034 return true; 1035 } 1036 1037 #if HAVE(PATH_BASED_BORDER_RADIUS_DRAWING) 1038 static bool borderWillArcInnerEdge(const IntSize& firstRadius, const IntSize& secondRadius) 1039 { 1040 return !firstRadius.isZero() || !secondRadius.isZero(); 1041 } 1042 1043 enum BorderEdgeFlag { 1044 TopBorderEdge = 1 << BSTop, 1045 RightBorderEdge = 1 << BSRight, 1046 BottomBorderEdge = 1 << BSBottom, 1047 LeftBorderEdge = 1 << BSLeft, 1048 AllBorderEdges = TopBorderEdge | BottomBorderEdge | LeftBorderEdge | RightBorderEdge 1049 }; 1050 1051 static inline BorderEdgeFlag edgeFlagForSide(BoxSide side) 1052 { 1053 return static_cast<BorderEdgeFlag>(1 << side); 1054 } 1055 1056 static inline bool includesEdge(BorderEdgeFlags flags, BoxSide side) 1057 { 1058 return flags & edgeFlagForSide(side); 1059 } 1060 1061 class BorderEdge { 1062 public: 1063 BorderEdge(int edgeWidth, const Color& edgeColor, EBorderStyle edgeStyle, bool edgeIsTransparent, bool edgeIsPresent) 1064 : width(edgeWidth) 1065 , color(edgeColor) 1066 , style(edgeStyle) 1067 , isTransparent(edgeIsTransparent) 1068 , isPresent(edgeIsPresent) 1069 { 1070 if (style == DOUBLE && edgeWidth < 3) 1071 style = SOLID; 1072 } 1073 1074 bool hasVisibleColorAndStyle() const { return style > BHIDDEN && !isTransparent; } 1075 bool shouldRender() const { return isPresent && hasVisibleColorAndStyle(); } 1076 bool presentButInvisible() const { return usedWidth() && !hasVisibleColorAndStyle(); } 1077 1078 int usedWidth() const { return isPresent ? width : 0; } 1079 1080 void getDoubleBorderStripeWidths(int& outerWidth, int& innerWidth) const 1081 { 1082 int fullWidth = usedWidth(); 1083 outerWidth = fullWidth / 3; 1084 innerWidth = fullWidth * 2 / 3; 1085 1086 // We need certain integer rounding results 1087 if (fullWidth % 3 == 2) 1088 outerWidth += 1; 1089 1090 if (fullWidth % 3 == 1) 1091 innerWidth += 1; 1092 } 1093 1094 int width; 1095 Color color; 1096 EBorderStyle style; 1097 bool isTransparent; 1098 bool isPresent; 1099 }; 1100 1101 inline bool edgesShareColor(const BorderEdge& firstEdge, const BorderEdge& secondEdge) 1102 { 1103 return firstEdge.color == secondEdge.color; 1104 } 1105 1106 inline bool styleRequiresClipPolygon(EBorderStyle style) 1107 { 1108 return style == DOTTED || style == DASHED; // These are drawn with a stroke, so we have to clip to get corner miters. 1109 } 1110 1111 static bool borderStyleFillsBorderArea(EBorderStyle style) 1112 { 1113 return !(style == DOTTED || style == DASHED || style == DOUBLE); 1114 } 1115 1116 static bool borderStyleHasInnerDetail(EBorderStyle style) 1117 { 1118 return style == GROOVE || style == RIDGE || style == DOUBLE; 1119 } 1120 1121 static bool borderStyleIsDottedOrDashed(EBorderStyle style) 1122 { 1123 return style == DOTTED || style == DASHED; 1124 } 1125 1126 // OUTSET darkens the bottom and right (and maybe lightens the top and left) 1127 // INSET darkens the top and left (and maybe lightens the bottom and right) 1128 static inline bool borderStyleHasUnmatchedColorsAtCorner(EBorderStyle style, BoxSide side, BoxSide adjacentSide) 1129 { 1130 // These styles match at the top/left and bottom/right. 1131 if (style == INSET || style == GROOVE || style == RIDGE || style == OUTSET) { 1132 const BorderEdgeFlags topRightFlags = edgeFlagForSide(BSTop) | edgeFlagForSide(BSRight); 1133 const BorderEdgeFlags bottomLeftFlags = edgeFlagForSide(BSBottom) | edgeFlagForSide(BSLeft); 1134 1135 BorderEdgeFlags flags = edgeFlagForSide(side) | edgeFlagForSide(adjacentSide); 1136 return flags == topRightFlags || flags == bottomLeftFlags; 1137 } 1138 return false; 1139 } 1140 1141 static inline bool colorsMatchAtCorner(BoxSide side, BoxSide adjacentSide, const BorderEdge edges[]) 1142 { 1143 if (edges[side].shouldRender() != edges[adjacentSide].shouldRender()) 1144 return false; 1145 1146 if (!edgesShareColor(edges[side], edges[adjacentSide])) 1147 return false; 1148 1149 return !borderStyleHasUnmatchedColorsAtCorner(edges[side].style, side, adjacentSide); 1150 } 1151 1152 // This assumes that we draw in order: top, bottom, left, right. 1153 static inline bool willBeOverdrawn(BoxSide side, BoxSide adjacentSide, const BorderEdge edges[]) 1154 { 1155 switch (side) { 1156 case BSTop: 1157 case BSBottom: 1158 if (edges[adjacentSide].presentButInvisible()) 1159 return false; 1160 1161 if (!edgesShareColor(edges[side], edges[adjacentSide]) && edges[adjacentSide].color.hasAlpha()) 1162 return false; 1163 1164 if (!borderStyleFillsBorderArea(edges[adjacentSide].style)) 1165 return false; 1166 1167 return true; 1168 1169 case BSLeft: 1170 case BSRight: 1171 // These draw last, so are never overdrawn. 1172 return false; 1173 } 1174 return false; 1175 } 1176 1177 static inline bool borderStylesRequireMitre(BoxSide side, BoxSide adjacentSide, EBorderStyle style, EBorderStyle adjacentStyle) 1178 { 1179 if (style == DOUBLE || adjacentStyle == DOUBLE || adjacentStyle == GROOVE || adjacentStyle == RIDGE) 1180 return true; 1181 1182 if (borderStyleIsDottedOrDashed(style) != borderStyleIsDottedOrDashed(adjacentStyle)) 1183 return true; 1184 1185 if (style != adjacentStyle) 1186 return true; 1187 1188 return borderStyleHasUnmatchedColorsAtCorner(style, side, adjacentSide); 1189 } 1190 1191 static bool joinRequiresMitre(BoxSide side, BoxSide adjacentSide, const BorderEdge edges[], bool allowOverdraw) 1192 { 1193 if ((edges[side].isTransparent && edges[adjacentSide].isTransparent) || !edges[adjacentSide].isPresent) 1194 return false; 1195 1196 if (allowOverdraw && willBeOverdrawn(side, adjacentSide, edges)) 1197 return false; 1198 1199 if (!edgesShareColor(edges[side], edges[adjacentSide])) 1200 return true; 1201 1202 if (borderStylesRequireMitre(side, adjacentSide, edges[side].style, edges[adjacentSide].style)) 1203 return true; 1204 1205 return false; 1206 } 1207 1208 void RenderBoxModelObject::paintOneBorderSide(GraphicsContext* graphicsContext, const RenderStyle* style, const RoundedIntRect& outerBorder, const RoundedIntRect& innerBorder, 1209 const IntRect& sideRect, BoxSide side, BoxSide adjacentSide1, BoxSide adjacentSide2, const BorderEdge edges[], const Path* path, 1210 bool includeLogicalLeftEdge, bool includeLogicalRightEdge, bool antialias, const Color* overrideColor) 1211 { 1212 const BorderEdge& edgeToRender = edges[side]; 1213 const BorderEdge& adjacentEdge1 = edges[adjacentSide1]; 1214 const BorderEdge& adjacentEdge2 = edges[adjacentSide2]; 1215 1216 bool mitreAdjacentSide1 = joinRequiresMitre(side, adjacentSide1, edges, !antialias); 1217 bool mitreAdjacentSide2 = joinRequiresMitre(side, adjacentSide2, edges, !antialias); 1218 1219 bool adjacentSide1StylesMatch = colorsMatchAtCorner(side, adjacentSide1, edges); 1220 bool adjacentSide2StylesMatch = colorsMatchAtCorner(side, adjacentSide2, edges); 1221 1222 const Color& colorToPaint = overrideColor ? *overrideColor : edgeToRender.color; 1223 1224 if (path) { 1225 graphicsContext->save(); 1226 clipBorderSidePolygon(graphicsContext, outerBorder, innerBorder, side, adjacentSide1StylesMatch, adjacentSide2StylesMatch); 1227 float thickness = max(max(edgeToRender.width, adjacentEdge1.width), adjacentEdge2.width); 1228 drawBoxSideFromPath(graphicsContext, outerBorder.rect(), *path, edges, edgeToRender.width, thickness, side, style, colorToPaint, edgeToRender.style, includeLogicalLeftEdge, includeLogicalRightEdge); 1229 graphicsContext->restore(); 1230 } else { 1231 bool didClip = false; 1232 1233 if (styleRequiresClipPolygon(edgeToRender.style) && (mitreAdjacentSide1 || mitreAdjacentSide2)) { 1234 graphicsContext->save(); 1235 clipBorderSidePolygon(graphicsContext, outerBorder, innerBorder, side, !mitreAdjacentSide1, !mitreAdjacentSide2); 1236 didClip = true; 1237 // Since we clipped, no need to draw with a mitre. 1238 mitreAdjacentSide1 = false; 1239 mitreAdjacentSide2 = false; 1240 } 1241 1242 drawLineForBoxSide(graphicsContext, sideRect.x(), sideRect.y(), sideRect.maxX(), sideRect.maxY(), side, colorToPaint, edgeToRender.style, 1243 mitreAdjacentSide1 ? adjacentEdge1.width : 0, mitreAdjacentSide2 ? adjacentEdge2.width : 0, antialias); 1244 1245 if (didClip) 1246 graphicsContext->restore(); 1247 } 1248 } 1249 1250 void RenderBoxModelObject::paintBorderSides(GraphicsContext* graphicsContext, const RenderStyle* style, const RoundedIntRect& outerBorder, const RoundedIntRect& innerBorder, 1251 const BorderEdge edges[], BorderEdgeFlags edgeSet, bool includeLogicalLeftEdge, bool includeLogicalRightEdge, bool antialias, const Color* overrideColor) 1252 { 1253 bool renderRadii = outerBorder.isRounded(); 1254 1255 Path roundedPath; 1256 if (renderRadii) 1257 roundedPath.addRoundedRect(outerBorder); 1258 1259 if (edges[BSTop].shouldRender() && includesEdge(edgeSet, BSTop)) { 1260 IntRect sideRect = outerBorder.rect(); 1261 sideRect.setHeight(edges[BSTop].width); 1262 1263 bool usePath = renderRadii && (borderStyleHasInnerDetail(edges[BSTop].style) || borderWillArcInnerEdge(innerBorder.radii().topLeft(), innerBorder.radii().topRight())); 1264 paintOneBorderSide(graphicsContext, style, outerBorder, innerBorder, sideRect, BSTop, BSLeft, BSRight, edges, usePath ? &roundedPath : 0, includeLogicalLeftEdge, includeLogicalRightEdge, antialias, overrideColor); 1265 } 1266 1267 if (edges[BSBottom].shouldRender() && includesEdge(edgeSet, BSBottom)) { 1268 IntRect sideRect = outerBorder.rect(); 1269 sideRect.shiftYEdgeTo(sideRect.maxY() - edges[BSBottom].width); 1270 1271 bool usePath = renderRadii && (borderStyleHasInnerDetail(edges[BSBottom].style) || borderWillArcInnerEdge(innerBorder.radii().bottomLeft(), innerBorder.radii().bottomRight())); 1272 paintOneBorderSide(graphicsContext, style, outerBorder, innerBorder, sideRect, BSBottom, BSLeft, BSRight, edges, usePath ? &roundedPath : 0, includeLogicalLeftEdge, includeLogicalRightEdge, antialias, overrideColor); 1273 } 1274 1275 if (edges[BSLeft].shouldRender() && includesEdge(edgeSet, BSLeft)) { 1276 IntRect sideRect = outerBorder.rect(); 1277 sideRect.setWidth(edges[BSLeft].width); 1278 1279 bool usePath = renderRadii && (borderStyleHasInnerDetail(edges[BSLeft].style) || borderWillArcInnerEdge(innerBorder.radii().bottomLeft(), innerBorder.radii().topLeft())); 1280 paintOneBorderSide(graphicsContext, style, outerBorder, innerBorder, sideRect, BSLeft, BSTop, BSBottom, edges, usePath ? &roundedPath : 0, includeLogicalLeftEdge, includeLogicalRightEdge, antialias, overrideColor); 1281 } 1282 1283 if (edges[BSRight].shouldRender() && includesEdge(edgeSet, BSRight)) { 1284 IntRect sideRect = outerBorder.rect(); 1285 sideRect.shiftXEdgeTo(sideRect.maxX() - edges[BSRight].width); 1286 1287 bool usePath = renderRadii && (borderStyleHasInnerDetail(edges[BSRight].style) || borderWillArcInnerEdge(innerBorder.radii().bottomRight(), innerBorder.radii().topRight())); 1288 paintOneBorderSide(graphicsContext, style, outerBorder, innerBorder, sideRect, BSRight, BSTop, BSBottom, edges, usePath ? &roundedPath : 0, includeLogicalLeftEdge, includeLogicalRightEdge, antialias, overrideColor); 1289 } 1290 } 1291 1292 void RenderBoxModelObject::paintTranslucentBorderSides(GraphicsContext* graphicsContext, const RenderStyle* style, const RoundedIntRect& outerBorder, const RoundedIntRect& innerBorder, 1293 const BorderEdge edges[], bool includeLogicalLeftEdge, bool includeLogicalRightEdge, bool antialias) 1294 { 1295 BorderEdgeFlags edgesToDraw = AllBorderEdges; 1296 while (edgesToDraw) { 1297 // Find undrawn edges sharing a color. 1298 Color commonColor; 1299 1300 BorderEdgeFlags commonColorEdgeSet = 0; 1301 for (int i = BSTop; i <= BSLeft; ++i) { 1302 BoxSide currSide = static_cast<BoxSide>(i); 1303 if (!includesEdge(edgesToDraw, currSide)) 1304 continue; 1305 1306 bool includeEdge; 1307 if (!commonColorEdgeSet) { 1308 commonColor = edges[currSide].color; 1309 includeEdge = true; 1310 } else 1311 includeEdge = edges[currSide].color == commonColor; 1312 1313 if (includeEdge) 1314 commonColorEdgeSet |= edgeFlagForSide(currSide); 1315 } 1316 1317 bool useTransparencyLayer = commonColor.hasAlpha(); 1318 if (useTransparencyLayer) { 1319 graphicsContext->beginTransparencyLayer(static_cast<float>(commonColor.alpha()) / 255); 1320 commonColor = Color(commonColor.red(), commonColor.green(), commonColor.blue()); 1321 } 1322 1323 paintBorderSides(graphicsContext, style, outerBorder, innerBorder, edges, commonColorEdgeSet, includeLogicalLeftEdge, includeLogicalRightEdge, antialias, &commonColor); 1324 1325 if (useTransparencyLayer) 1326 graphicsContext->endTransparencyLayer(); 1327 1328 edgesToDraw &= ~commonColorEdgeSet; 1329 } 1330 } 1331 1332 void RenderBoxModelObject::paintBorder(GraphicsContext* graphicsContext, int tx, int ty, int w, int h, 1333 const RenderStyle* style, bool includeLogicalLeftEdge, bool includeLogicalRightEdge) 1334 { 1335 if (paintNinePieceImage(graphicsContext, tx, ty, w, h, style, style->borderImage())) 1336 return; 1337 1338 if (graphicsContext->paintingDisabled()) 1339 return; 1340 1341 bool horizontal = style->isHorizontalWritingMode(); 1342 1343 BorderEdge edges[4] = { 1344 // BSTop 1345 BorderEdge(style->borderTopWidth(), 1346 style->visitedDependentColor(CSSPropertyBorderTopColor), 1347 style->borderTopStyle(), 1348 style->borderTopIsTransparent(), 1349 horizontal || includeLogicalLeftEdge), 1350 // BSRight 1351 BorderEdge(style->borderRightWidth(), 1352 style->visitedDependentColor(CSSPropertyBorderRightColor), 1353 style->borderRightStyle(), 1354 style->borderRightIsTransparent(), 1355 !horizontal || includeLogicalRightEdge), 1356 // BSBottom 1357 BorderEdge(style->borderBottomWidth(), 1358 style->visitedDependentColor(CSSPropertyBorderBottomColor), 1359 style->borderBottomStyle(), 1360 style->borderBottomIsTransparent(), 1361 horizontal || includeLogicalRightEdge), 1362 // BSLeft 1363 BorderEdge(style->borderLeftWidth(), 1364 style->visitedDependentColor(CSSPropertyBorderLeftColor), 1365 style->borderLeftStyle(), 1366 style->borderLeftIsTransparent(), 1367 !horizontal || includeLogicalLeftEdge) 1368 }; 1369 1370 IntRect borderRect(tx, ty, w, h); 1371 RoundedIntRect outerBorder = style->getRoundedBorderFor(borderRect, includeLogicalLeftEdge, includeLogicalRightEdge); 1372 RoundedIntRect innerBorder = style->getRoundedInnerBorderFor(borderRect, includeLogicalLeftEdge, includeLogicalRightEdge); 1373 1374 const AffineTransform& currentCTM = graphicsContext->getCTM(); 1375 // FIXME: this isn't quite correct. We may want to antialias when scaled by a non-integral value, or when the translation is non-integral. 1376 bool antialias = !currentCTM.isIdentityOrTranslationOrFlipped(); 1377 1378 bool haveAlphaColor = false; 1379 bool haveAllSolidEdges = true; 1380 bool allEdgesVisible = true; 1381 bool allEdgesShareColor = true; 1382 int firstVisibleEdge = -1; 1383 1384 for (int i = BSTop; i <= BSLeft; ++i) { 1385 const BorderEdge& currEdge = edges[i]; 1386 if (currEdge.presentButInvisible()) { 1387 allEdgesVisible = false; 1388 continue; 1389 } 1390 1391 if (!currEdge.width) 1392 continue; 1393 1394 if (firstVisibleEdge == -1) 1395 firstVisibleEdge = i; 1396 else if (currEdge.color != edges[firstVisibleEdge].color) 1397 allEdgesShareColor = false; 1398 1399 if (currEdge.color.hasAlpha()) 1400 haveAlphaColor = true; 1401 1402 if (currEdge.style != SOLID) 1403 haveAllSolidEdges = false; 1404 } 1405 1406 // isRenderable() check avoids issue described in https://bugs.webkit.org/show_bug.cgi?id=38787 1407 if (haveAllSolidEdges && allEdgesVisible && allEdgesShareColor && innerBorder.isRenderable()) { 1408 // Fast path for drawing all solid edges. 1409 if (outerBorder.isRounded() || haveAlphaColor) { 1410 Path path; 1411 1412 // FIXME: Path should take a RoundedIntRect directly. 1413 if (outerBorder.isRounded()) 1414 path.addRoundedRect(outerBorder); 1415 else 1416 path.addRect(outerBorder.rect()); 1417 1418 if (innerBorder.isRounded()) 1419 path.addRoundedRect(innerBorder); 1420 else 1421 path.addRect(innerBorder.rect()); 1422 1423 graphicsContext->setFillRule(RULE_EVENODD); 1424 graphicsContext->setFillColor(edges[firstVisibleEdge].color, style->colorSpace()); 1425 graphicsContext->fillPath(path); 1426 } else 1427 paintBorderSides(graphicsContext, style, outerBorder, innerBorder, edges, AllBorderEdges, includeLogicalLeftEdge, includeLogicalRightEdge, antialias); 1428 1429 return; 1430 } 1431 1432 if (outerBorder.isRounded()) { 1433 // Clip to the inner and outer radii rects. 1434 graphicsContext->save(); 1435 graphicsContext->addRoundedRectClip(outerBorder); 1436 graphicsContext->clipOutRoundedRect(innerBorder); 1437 } 1438 1439 if (haveAlphaColor) 1440 paintTranslucentBorderSides(graphicsContext, style, outerBorder, innerBorder, edges, includeLogicalLeftEdge, includeLogicalRightEdge, antialias); 1441 else 1442 paintBorderSides(graphicsContext, style, outerBorder, innerBorder, edges, AllBorderEdges, includeLogicalLeftEdge, includeLogicalRightEdge, antialias); 1443 1444 if (outerBorder.isRounded()) 1445 graphicsContext->restore(); 1446 } 1447 1448 void RenderBoxModelObject::drawBoxSideFromPath(GraphicsContext* graphicsContext, const IntRect& borderRect, const Path& borderPath, const BorderEdge edges[], 1449 float thickness, float drawThickness, BoxSide side, const RenderStyle* style, 1450 Color color, EBorderStyle borderStyle, bool includeLogicalLeftEdge, bool includeLogicalRightEdge) 1451 { 1452 if (thickness <= 0) 1453 return; 1454 1455 if (borderStyle == DOUBLE && thickness < 3) 1456 borderStyle = SOLID; 1457 1458 switch (borderStyle) { 1459 case BNONE: 1460 case BHIDDEN: 1461 return; 1462 case DOTTED: 1463 case DASHED: { 1464 graphicsContext->setStrokeColor(color, style->colorSpace()); 1465 1466 // The stroke is doubled here because the provided path is the 1467 // outside edge of the border so half the stroke is clipped off. 1468 // The extra multiplier is so that the clipping mask can antialias 1469 // the edges to prevent jaggies. 1470 graphicsContext->setStrokeThickness(drawThickness * 2 * 1.1f); 1471 graphicsContext->setStrokeStyle(borderStyle == DASHED ? DashedStroke : DottedStroke); 1472 1473 // If the number of dashes that fit in the path is odd and non-integral then we 1474 // will have an awkwardly-sized dash at the end of the path. To try to avoid that 1475 // here, we simply make the whitespace dashes ever so slightly bigger. 1476 // FIXME: This could be even better if we tried to manipulate the dash offset 1477 // and possibly the gapLength to get the corners dash-symmetrical. 1478 float dashLength = thickness * ((borderStyle == DASHED) ? 3.0f : 1.0f); 1479 float gapLength = dashLength; 1480 float numberOfDashes = borderPath.length() / dashLength; 1481 // Don't try to show dashes if we have less than 2 dashes + 2 gaps. 1482 // FIXME: should do this test per side. 1483 if (numberOfDashes >= 4) { 1484 bool evenNumberOfFullDashes = !((int)numberOfDashes % 2); 1485 bool integralNumberOfDashes = !(numberOfDashes - (int)numberOfDashes); 1486 if (!evenNumberOfFullDashes && !integralNumberOfDashes) { 1487 float numberOfGaps = numberOfDashes / 2; 1488 gapLength += (dashLength / numberOfGaps); 1489 } 1490 1491 DashArray lineDash; 1492 lineDash.append(dashLength); 1493 lineDash.append(gapLength); 1494 graphicsContext->setLineDash(lineDash, dashLength); 1495 } 1496 1497 // FIXME: stroking the border path causes issues with tight corners: 1498 // https://bugs.webkit.org/show_bug.cgi?id=58711 1499 // Also, to get the best appearance we should stroke a path between the two borders. 1500 graphicsContext->strokePath(borderPath); 1501 return; 1502 } 1503 case DOUBLE: { 1504 // Get the inner border rects for both the outer border line and the inner border line 1505 int outerBorderTopWidth; 1506 int innerBorderTopWidth; 1507 edges[BSTop].getDoubleBorderStripeWidths(outerBorderTopWidth, innerBorderTopWidth); 1508 1509 int outerBorderRightWidth; 1510 int innerBorderRightWidth; 1511 edges[BSRight].getDoubleBorderStripeWidths(outerBorderRightWidth, innerBorderRightWidth); 1512 1513 int outerBorderBottomWidth; 1514 int innerBorderBottomWidth; 1515 edges[BSBottom].getDoubleBorderStripeWidths(outerBorderBottomWidth, innerBorderBottomWidth); 1516 1517 int outerBorderLeftWidth; 1518 int innerBorderLeftWidth; 1519 edges[BSLeft].getDoubleBorderStripeWidths(outerBorderLeftWidth, innerBorderLeftWidth); 1520 1521 // Draw inner border line 1522 graphicsContext->save(); 1523 1524 RoundedIntRect innerClip = style->getRoundedInnerBorderFor(borderRect, 1525 innerBorderTopWidth, innerBorderBottomWidth, innerBorderLeftWidth, innerBorderRightWidth, 1526 includeLogicalLeftEdge, includeLogicalRightEdge); 1527 1528 graphicsContext->addRoundedRectClip(innerClip); 1529 drawBoxSideFromPath(graphicsContext, borderRect, borderPath, edges, thickness, drawThickness, side, style, color, SOLID, includeLogicalLeftEdge, includeLogicalRightEdge); 1530 graphicsContext->restore(); 1531 1532 // Draw outer border line 1533 graphicsContext->save(); 1534 1535 RoundedIntRect outerClip = style->getRoundedInnerBorderFor(borderRect, 1536 outerBorderTopWidth, outerBorderBottomWidth, outerBorderLeftWidth, outerBorderRightWidth, 1537 includeLogicalLeftEdge, includeLogicalRightEdge); 1538 1539 graphicsContext->clipOutRoundedRect(outerClip); 1540 drawBoxSideFromPath(graphicsContext, borderRect, borderPath, edges, thickness, drawThickness, side, style, color, SOLID, includeLogicalLeftEdge, includeLogicalRightEdge); 1541 graphicsContext->restore(); 1542 return; 1543 } 1544 case RIDGE: 1545 case GROOVE: 1546 { 1547 EBorderStyle s1; 1548 EBorderStyle s2; 1549 if (borderStyle == GROOVE) { 1550 s1 = INSET; 1551 s2 = OUTSET; 1552 } else { 1553 s1 = OUTSET; 1554 s2 = INSET; 1555 } 1556 1557 // Paint full border 1558 drawBoxSideFromPath(graphicsContext, borderRect, borderPath, edges, thickness, drawThickness, side, style, color, s1, includeLogicalLeftEdge, includeLogicalRightEdge); 1559 1560 // Paint inner only 1561 graphicsContext->save(); 1562 1563 int topWidth = edges[BSTop].usedWidth() / 2; 1564 int bottomWidth = edges[BSBottom].usedWidth() / 2; 1565 int leftWidth = edges[BSLeft].usedWidth() / 2; 1566 int rightWidth = edges[BSRight].usedWidth() / 2; 1567 1568 RoundedIntRect clipRect = style->getRoundedInnerBorderFor(borderRect, 1569 topWidth, bottomWidth, leftWidth, rightWidth, 1570 includeLogicalLeftEdge, includeLogicalRightEdge); 1571 1572 graphicsContext->addRoundedRectClip(clipRect); 1573 drawBoxSideFromPath(graphicsContext, borderRect, borderPath, edges, thickness, drawThickness, side, style, color, s2, includeLogicalLeftEdge, includeLogicalRightEdge); 1574 graphicsContext->restore(); 1575 return; 1576 } 1577 case INSET: 1578 if (side == BSTop || side == BSLeft) 1579 color = color.dark(); 1580 break; 1581 case OUTSET: 1582 if (side == BSBottom || side == BSRight) 1583 color = color.dark(); 1584 break; 1585 default: 1586 break; 1587 } 1588 1589 graphicsContext->setStrokeStyle(NoStroke); 1590 graphicsContext->setFillColor(color, style->colorSpace()); 1591 graphicsContext->drawRect(borderRect); 1592 } 1593 #else 1594 void RenderBoxModelObject::paintBorder(GraphicsContext* graphicsContext, int tx, int ty, int w, int h, 1595 const RenderStyle* style, bool includeLogicalLeftEdge, bool includeLogicalRightEdge) 1596 { 1597 // FIXME: This old version of paintBorder should be removed when all ports implement 1598 // GraphicsContext::clipConvexPolygon()!! This should happen soon. 1599 if (paintNinePieceImage(graphicsContext, tx, ty, w, h, style, style->borderImage())) 1600 return; 1601 1602 const Color& topColor = style->visitedDependentColor(CSSPropertyBorderTopColor); 1603 const Color& bottomColor = style->visitedDependentColor(CSSPropertyBorderBottomColor); 1604 const Color& leftColor = style->visitedDependentColor(CSSPropertyBorderLeftColor); 1605 const Color& rightColor = style->visitedDependentColor(CSSPropertyBorderRightColor); 1606 1607 bool topTransparent = style->borderTopIsTransparent(); 1608 bool bottomTransparent = style->borderBottomIsTransparent(); 1609 bool rightTransparent = style->borderRightIsTransparent(); 1610 bool leftTransparent = style->borderLeftIsTransparent(); 1611 1612 EBorderStyle topStyle = style->borderTopStyle(); 1613 EBorderStyle bottomStyle = style->borderBottomStyle(); 1614 EBorderStyle leftStyle = style->borderLeftStyle(); 1615 EBorderStyle rightStyle = style->borderRightStyle(); 1616 1617 bool horizontal = style->isHorizontalWritingMode(); 1618 bool renderTop = topStyle > BHIDDEN && !topTransparent && (horizontal || includeLogicalLeftEdge); 1619 bool renderLeft = leftStyle > BHIDDEN && !leftTransparent && (!horizontal || includeLogicalLeftEdge); 1620 bool renderRight = rightStyle > BHIDDEN && !rightTransparent && (!horizontal || includeLogicalRightEdge); 1621 bool renderBottom = bottomStyle > BHIDDEN && !bottomTransparent && (horizontal || includeLogicalRightEdge); 1622 1623 1624 RoundedIntRect border(tx, ty, w, h); 1625 if (style->hasBorderRadius()) { 1626 border.includeLogicalEdges(style->getRoundedBorderFor(border.rect()).radii(), 1627 horizontal, includeLogicalLeftEdge, includeLogicalRightEdge); 1628 if (border.isRounded()) { 1629 graphicsContext->save(); 1630 graphicsContext->addRoundedRectClip(border); 1631 } 1632 } 1633 1634 int firstAngleStart, secondAngleStart, firstAngleSpan, secondAngleSpan; 1635 float thickness; 1636 bool renderRadii = border.isRounded(); 1637 bool upperLeftBorderStylesMatch = renderLeft && (topStyle == leftStyle) && (topColor == leftColor); 1638 bool upperRightBorderStylesMatch = renderRight && (topStyle == rightStyle) && (topColor == rightColor) && (topStyle != OUTSET) && (topStyle != RIDGE) && (topStyle != INSET) && (topStyle != GROOVE); 1639 bool lowerLeftBorderStylesMatch = renderLeft && (bottomStyle == leftStyle) && (bottomColor == leftColor) && (bottomStyle != OUTSET) && (bottomStyle != RIDGE) && (bottomStyle != INSET) && (bottomStyle != GROOVE); 1640 bool lowerRightBorderStylesMatch = renderRight && (bottomStyle == rightStyle) && (bottomColor == rightColor); 1641 1642 if (renderTop) { 1643 bool ignoreLeft = (renderRadii && border.radii().topLeft().width() > 0) 1644 || (topColor == leftColor && topTransparent == leftTransparent && topStyle >= OUTSET 1645 && (leftStyle == DOTTED || leftStyle == DASHED || leftStyle == SOLID || leftStyle == OUTSET)); 1646 1647 bool ignoreRight = (renderRadii && border.radii().topRight().width() > 0) 1648 || (topColor == rightColor && topTransparent == rightTransparent && topStyle >= OUTSET 1649 && (rightStyle == DOTTED || rightStyle == DASHED || rightStyle == SOLID || rightStyle == INSET)); 1650 1651 int x = tx; 1652 int x2 = tx + w; 1653 if (renderRadii) { 1654 x += border.radii().topLeft().width(); 1655 x2 -= border.radii().topRight().width(); 1656 } 1657 1658 drawLineForBoxSide(graphicsContext, x, ty, x2, ty + style->borderTopWidth(), BSTop, topColor, topStyle, 1659 ignoreLeft ? 0 : style->borderLeftWidth(), ignoreRight ? 0 : style->borderRightWidth()); 1660 1661 if (renderRadii) { 1662 int leftY = ty; 1663 1664 // We make the arc double thick and let the clip rect take care of clipping the extra off. 1665 // We're doing this because it doesn't seem possible to match the curve of the clip exactly 1666 // with the arc-drawing function. 1667 thickness = style->borderTopWidth() * 2; 1668 1669 if (border.radii().topLeft().width()) { 1670 int leftX = tx; 1671 // The inner clip clips inside the arc. This is especially important for 1px borders. 1672 bool applyLeftInnerClip = (style->borderLeftWidth() < border.radii().topLeft().width()) 1673 && (style->borderTopWidth() < border.radii().topLeft().height()) 1674 && (topStyle != DOUBLE || style->borderTopWidth() > 6); 1675 if (applyLeftInnerClip) { 1676 graphicsContext->save(); 1677 graphicsContext->addInnerRoundedRectClip(IntRect(leftX, leftY, border.radii().topLeft().width() * 2, border.radii().topLeft().height() * 2), 1678 style->borderTopWidth()); 1679 } 1680 1681 firstAngleStart = 90; 1682 firstAngleSpan = upperLeftBorderStylesMatch ? 90 : 45; 1683 1684 // Draw upper left arc 1685 drawArcForBoxSide(graphicsContext, leftX, leftY, thickness, border.radii().topLeft(), firstAngleStart, firstAngleSpan, 1686 BSTop, topColor, topStyle, true); 1687 if (applyLeftInnerClip) 1688 graphicsContext->restore(); 1689 } 1690 1691 if (border.radii().topRight().width()) { 1692 int rightX = tx + w - border.radii().topRight().width() * 2; 1693 bool applyRightInnerClip = (style->borderRightWidth() < border.radii().topRight().width()) 1694 && (style->borderTopWidth() < border.radii().topRight().height()) 1695 && (topStyle != DOUBLE || style->borderTopWidth() > 6); 1696 if (applyRightInnerClip) { 1697 graphicsContext->save(); 1698 graphicsContext->addInnerRoundedRectClip(IntRect(rightX, leftY, border.radii().topRight().width() * 2, border.radii().topRight().height() * 2), 1699 style->borderTopWidth()); 1700 } 1701 1702 if (upperRightBorderStylesMatch) { 1703 secondAngleStart = 0; 1704 secondAngleSpan = 90; 1705 } else { 1706 secondAngleStart = 45; 1707 secondAngleSpan = 45; 1708 } 1709 1710 // Draw upper right arc 1711 drawArcForBoxSide(graphicsContext, rightX, leftY, thickness, border.radii().topRight(), secondAngleStart, secondAngleSpan, 1712 BSTop, topColor, topStyle, false); 1713 if (applyRightInnerClip) 1714 graphicsContext->restore(); 1715 } 1716 } 1717 } 1718 1719 if (renderBottom) { 1720 bool ignoreLeft = (renderRadii && border.radii().bottomLeft().width() > 0) 1721 || (bottomColor == leftColor && bottomTransparent == leftTransparent && bottomStyle >= OUTSET 1722 && (leftStyle == DOTTED || leftStyle == DASHED || leftStyle == SOLID || leftStyle == OUTSET)); 1723 1724 bool ignoreRight = (renderRadii && border.radii().bottomRight().width() > 0) 1725 || (bottomColor == rightColor && bottomTransparent == rightTransparent && bottomStyle >= OUTSET 1726 && (rightStyle == DOTTED || rightStyle == DASHED || rightStyle == SOLID || rightStyle == INSET)); 1727 1728 int x = tx; 1729 int x2 = tx + w; 1730 if (renderRadii) { 1731 x += border.radii().bottomLeft().width(); 1732 x2 -= border.radii().bottomRight().width(); 1733 } 1734 1735 drawLineForBoxSide(graphicsContext, x, ty + h - style->borderBottomWidth(), x2, ty + h, BSBottom, bottomColor, bottomStyle, 1736 ignoreLeft ? 0 : style->borderLeftWidth(), ignoreRight ? 0 : style->borderRightWidth()); 1737 1738 if (renderRadii) { 1739 thickness = style->borderBottomWidth() * 2; 1740 1741 if (border.radii().bottomLeft().width()) { 1742 int leftX = tx; 1743 int leftY = ty + h - border.radii().bottomLeft().height() * 2; 1744 bool applyLeftInnerClip = (style->borderLeftWidth() < border.radii().bottomLeft().width()) 1745 && (style->borderBottomWidth() < border.radii().bottomLeft().height()) 1746 && (bottomStyle != DOUBLE || style->borderBottomWidth() > 6); 1747 if (applyLeftInnerClip) { 1748 graphicsContext->save(); 1749 graphicsContext->addInnerRoundedRectClip(IntRect(leftX, leftY, border.radii().bottomLeft().width() * 2, border.radii().bottomLeft().height() * 2), 1750 style->borderBottomWidth()); 1751 } 1752 1753 if (lowerLeftBorderStylesMatch) { 1754 firstAngleStart = 180; 1755 firstAngleSpan = 90; 1756 } else { 1757 firstAngleStart = 225; 1758 firstAngleSpan = 45; 1759 } 1760 1761 // Draw lower left arc 1762 drawArcForBoxSide(graphicsContext, leftX, leftY, thickness, border.radii().bottomLeft(), firstAngleStart, firstAngleSpan, 1763 BSBottom, bottomColor, bottomStyle, true); 1764 if (applyLeftInnerClip) 1765 graphicsContext->restore(); 1766 } 1767 1768 if (border.radii().bottomRight().width()) { 1769 int rightY = ty + h - border.radii().bottomRight().height() * 2; 1770 int rightX = tx + w - border.radii().bottomRight().width() * 2; 1771 bool applyRightInnerClip = (style->borderRightWidth() < border.radii().bottomRight().width()) 1772 && (style->borderBottomWidth() < border.radii().bottomRight().height()) 1773 && (bottomStyle != DOUBLE || style->borderBottomWidth() > 6); 1774 if (applyRightInnerClip) { 1775 graphicsContext->save(); 1776 graphicsContext->addInnerRoundedRectClip(IntRect(rightX, rightY, border.radii().bottomRight().width() * 2, border.radii().bottomRight().height() * 2), 1777 style->borderBottomWidth()); 1778 } 1779 1780 secondAngleStart = 270; 1781 secondAngleSpan = lowerRightBorderStylesMatch ? 90 : 45; 1782 1783 // Draw lower right arc 1784 drawArcForBoxSide(graphicsContext, rightX, rightY, thickness, border.radii().bottomRight(), secondAngleStart, secondAngleSpan, 1785 BSBottom, bottomColor, bottomStyle, false); 1786 if (applyRightInnerClip) 1787 graphicsContext->restore(); 1788 } 1789 } 1790 } 1791 1792 if (renderLeft) { 1793 bool ignoreTop = (renderRadii && border.radii().topLeft().height() > 0) 1794 || (topColor == leftColor && topTransparent == leftTransparent && leftStyle >= OUTSET 1795 && (topStyle == DOTTED || topStyle == DASHED || topStyle == SOLID || topStyle == OUTSET)); 1796 1797 bool ignoreBottom = (renderRadii && border.radii().bottomLeft().height() > 0) 1798 || (bottomColor == leftColor && bottomTransparent == leftTransparent && leftStyle >= OUTSET 1799 && (bottomStyle == DOTTED || bottomStyle == DASHED || bottomStyle == SOLID || bottomStyle == INSET)); 1800 1801 int y = ty; 1802 int y2 = ty + h; 1803 if (renderRadii) { 1804 y += border.radii().topLeft().height(); 1805 y2 -= border.radii().bottomLeft().height(); 1806 } 1807 1808 drawLineForBoxSide(graphicsContext, tx, y, tx + style->borderLeftWidth(), y2, BSLeft, leftColor, leftStyle, 1809 ignoreTop ? 0 : style->borderTopWidth(), ignoreBottom ? 0 : style->borderBottomWidth()); 1810 1811 if (renderRadii && (!upperLeftBorderStylesMatch || !lowerLeftBorderStylesMatch)) { 1812 int topX = tx; 1813 thickness = style->borderLeftWidth() * 2; 1814 1815 if (!upperLeftBorderStylesMatch && border.radii().topLeft().width()) { 1816 int topY = ty; 1817 bool applyTopInnerClip = (style->borderLeftWidth() < border.radii().topLeft().width()) 1818 && (style->borderTopWidth() < border.radii().topLeft().height()) 1819 && (leftStyle != DOUBLE || style->borderLeftWidth() > 6); 1820 if (applyTopInnerClip) { 1821 graphicsContext->save(); 1822 graphicsContext->addInnerRoundedRectClip(IntRect(topX, topY, border.radii().topLeft().width() * 2, border.radii().topLeft().height() * 2), 1823 style->borderLeftWidth()); 1824 } 1825 1826 firstAngleStart = 135; 1827 firstAngleSpan = 45; 1828 1829 // Draw top left arc 1830 drawArcForBoxSide(graphicsContext, topX, topY, thickness, border.radii().topLeft(), firstAngleStart, firstAngleSpan, 1831 BSLeft, leftColor, leftStyle, true); 1832 if (applyTopInnerClip) 1833 graphicsContext->restore(); 1834 } 1835 1836 if (!lowerLeftBorderStylesMatch && border.radii().bottomLeft().width()) { 1837 int bottomY = ty + h - border.radii().bottomLeft().height() * 2; 1838 bool applyBottomInnerClip = (style->borderLeftWidth() < border.radii().bottomLeft().width()) 1839 && (style->borderBottomWidth() < border.radii().bottomLeft().height()) 1840 && (leftStyle != DOUBLE || style->borderLeftWidth() > 6); 1841 if (applyBottomInnerClip) { 1842 graphicsContext->save(); 1843 graphicsContext->addInnerRoundedRectClip(IntRect(topX, bottomY, border.radii().bottomLeft().width() * 2, border.radii().bottomLeft().height() * 2), 1844 style->borderLeftWidth()); 1845 } 1846 1847 secondAngleStart = 180; 1848 secondAngleSpan = 45; 1849 1850 // Draw bottom left arc 1851 drawArcForBoxSide(graphicsContext, topX, bottomY, thickness, border.radii().bottomLeft(), secondAngleStart, secondAngleSpan, 1852 BSLeft, leftColor, leftStyle, false); 1853 if (applyBottomInnerClip) 1854 graphicsContext->restore(); 1855 } 1856 } 1857 } 1858 1859 if (renderRight) { 1860 bool ignoreTop = (renderRadii && border.radii().topRight().height() > 0) 1861 || ((topColor == rightColor) && (topTransparent == rightTransparent) 1862 && (rightStyle >= DOTTED || rightStyle == INSET) 1863 && (topStyle == DOTTED || topStyle == DASHED || topStyle == SOLID || topStyle == OUTSET)); 1864 1865 bool ignoreBottom = (renderRadii && border.radii().bottomRight().height() > 0) 1866 || ((bottomColor == rightColor) && (bottomTransparent == rightTransparent) 1867 && (rightStyle >= DOTTED || rightStyle == INSET) 1868 && (bottomStyle == DOTTED || bottomStyle == DASHED || bottomStyle == SOLID || bottomStyle == INSET)); 1869 1870 int y = ty; 1871 int y2 = ty + h; 1872 if (renderRadii) { 1873 y += border.radii().topRight().height(); 1874 y2 -= border.radii().bottomRight().height(); 1875 } 1876 1877 drawLineForBoxSide(graphicsContext, tx + w - style->borderRightWidth(), y, tx + w, y2, BSRight, rightColor, rightStyle, 1878 ignoreTop ? 0 : style->borderTopWidth(), ignoreBottom ? 0 : style->borderBottomWidth()); 1879 1880 if (renderRadii && (!upperRightBorderStylesMatch || !lowerRightBorderStylesMatch)) { 1881 thickness = style->borderRightWidth() * 2; 1882 1883 if (!upperRightBorderStylesMatch && border.radii().topRight().width()) { 1884 int topX = tx + w - border.radii().topRight().width() * 2; 1885 int topY = ty; 1886 bool applyTopInnerClip = (style->borderRightWidth() < border.radii().topRight().width()) 1887 && (style->borderTopWidth() < border.radii().topRight().height()) 1888 && (rightStyle != DOUBLE || style->borderRightWidth() > 6); 1889 if (applyTopInnerClip) { 1890 graphicsContext->save(); 1891 graphicsContext->addInnerRoundedRectClip(IntRect(topX, topY, border.radii().topRight().width() * 2, border.radii().topRight().height() * 2), 1892 style->borderRightWidth()); 1893 } 1894 1895 firstAngleStart = 0; 1896 firstAngleSpan = 45; 1897 1898 // Draw top right arc 1899 drawArcForBoxSide(graphicsContext, topX, topY, thickness, border.radii().topRight(), firstAngleStart, firstAngleSpan, 1900 BSRight, rightColor, rightStyle, true); 1901 if (applyTopInnerClip) 1902 graphicsContext->restore(); 1903 } 1904 1905 if (!lowerRightBorderStylesMatch && border.radii().bottomRight().width()) { 1906 int bottomX = tx + w - border.radii().bottomRight().width() * 2; 1907 int bottomY = ty + h - border.radii().bottomRight().height() * 2; 1908 bool applyBottomInnerClip = (style->borderRightWidth() < border.radii().bottomRight().width()) 1909 && (style->borderBottomWidth() < border.radii().bottomRight().height()) 1910 && (rightStyle != DOUBLE || style->borderRightWidth() > 6); 1911 if (applyBottomInnerClip) { 1912 graphicsContext->save(); 1913 graphicsContext->addInnerRoundedRectClip(IntRect(bottomX, bottomY, border.radii().bottomRight().width() * 2, border.radii().bottomRight().height() * 2), 1914 style->borderRightWidth()); 1915 } 1916 1917 secondAngleStart = 315; 1918 secondAngleSpan = 45; 1919 1920 // Draw bottom right arc 1921 drawArcForBoxSide(graphicsContext, bottomX, bottomY, thickness, border.radii().bottomRight(), secondAngleStart, secondAngleSpan, 1922 BSRight, rightColor, rightStyle, false); 1923 if (applyBottomInnerClip) 1924 graphicsContext->restore(); 1925 } 1926 } 1927 } 1928 1929 if (renderRadii) 1930 graphicsContext->restore(); 1931 } 1932 #endif 1933 1934 static void findInnerVertex(const FloatPoint& outerCorner, const FloatPoint& innerCorner, const FloatPoint& centerPoint, FloatPoint& result) 1935 { 1936 // If the line between outer and inner corner is towards the horizontal, intersect with a vertical line through the center, 1937 // otherwise with a horizontal line through the center. The points that form this line are arbitrary (we use 0, 100). 1938 // Note that if findIntersection fails, it will leave result untouched. 1939 if (fabs(outerCorner.x() - innerCorner.x()) > fabs(outerCorner.y() - innerCorner.y())) 1940 findIntersection(outerCorner, innerCorner, FloatPoint(centerPoint.x(), 0), FloatPoint(centerPoint.x(), 100), result); 1941 else 1942 findIntersection(outerCorner, innerCorner, FloatPoint(0, centerPoint.y()), FloatPoint(100, centerPoint.y()), result); 1943 } 1944 1945 void RenderBoxModelObject::clipBorderSidePolygon(GraphicsContext* graphicsContext, const RoundedIntRect& outerBorder, const RoundedIntRect& innerBorder, 1946 BoxSide side, bool firstEdgeMatches, bool secondEdgeMatches) 1947 { 1948 FloatPoint quad[4]; 1949 1950 const IntRect& outerRect = outerBorder.rect(); 1951 const IntRect& innerRect = innerBorder.rect(); 1952 1953 FloatPoint centerPoint(innerRect.location().x() + static_cast<float>(innerRect.width()) / 2, innerRect.location().y() + static_cast<float>(innerRect.height()) / 2); 1954 1955 // For each side, create a quad that encompasses all parts of that side that may draw, 1956 // including areas inside the innerBorder. 1957 // 1958 // 0----------------3 1959 // 0 \ / 0 1960 // |\ 1----------- 2 /| 1961 // | 1 1 | 1962 // | | | | 1963 // | | | | 1964 // | 2 2 | 1965 // |/ 1------------2 \| 1966 // 3 / \ 3 1967 // 0----------------3 1968 // 1969 switch (side) { 1970 case BSTop: 1971 quad[0] = outerRect.minXMinYCorner(); 1972 quad[1] = innerRect.minXMinYCorner(); 1973 quad[2] = innerRect.maxXMinYCorner(); 1974 quad[3] = outerRect.maxXMinYCorner(); 1975 1976 if (!innerBorder.radii().topLeft().isZero()) 1977 findInnerVertex(outerRect.minXMinYCorner(), innerRect.minXMinYCorner(), centerPoint, quad[1]); 1978 1979 if (!innerBorder.radii().topRight().isZero()) 1980 findInnerVertex(outerRect.maxXMinYCorner(), innerRect.maxXMinYCorner(), centerPoint, quad[2]); 1981 break; 1982 1983 case BSLeft: 1984 quad[0] = outerRect.minXMinYCorner(); 1985 quad[1] = innerRect.minXMinYCorner(); 1986 quad[2] = innerRect.minXMaxYCorner(); 1987 quad[3] = outerRect.minXMaxYCorner(); 1988 1989 if (!innerBorder.radii().topLeft().isZero()) 1990 findInnerVertex(outerRect.minXMinYCorner(), innerRect.minXMinYCorner(), centerPoint, quad[1]); 1991 1992 if (!innerBorder.radii().bottomLeft().isZero()) 1993 findInnerVertex(outerRect.minXMaxYCorner(), innerRect.minXMaxYCorner(), centerPoint, quad[2]); 1994 break; 1995 1996 case BSBottom: 1997 quad[0] = outerRect.minXMaxYCorner(); 1998 quad[1] = innerRect.minXMaxYCorner(); 1999 quad[2] = innerRect.maxXMaxYCorner(); 2000 quad[3] = outerRect.maxXMaxYCorner(); 2001 2002 if (!innerBorder.radii().bottomLeft().isZero()) 2003 findInnerVertex(outerRect.minXMaxYCorner(), innerRect.minXMaxYCorner(), centerPoint, quad[1]); 2004 2005 if (!innerBorder.radii().bottomRight().isZero()) 2006 findInnerVertex(outerRect.maxXMaxYCorner(), innerRect.maxXMaxYCorner(), centerPoint, quad[2]); 2007 break; 2008 2009 case BSRight: 2010 quad[0] = outerRect.maxXMinYCorner(); 2011 quad[1] = innerRect.maxXMinYCorner(); 2012 quad[2] = innerRect.maxXMaxYCorner(); 2013 quad[3] = outerRect.maxXMaxYCorner(); 2014 2015 if (!innerBorder.radii().topRight().isZero()) 2016 findInnerVertex(outerRect.maxXMinYCorner(), innerRect.maxXMinYCorner(), centerPoint, quad[1]); 2017 2018 if (!innerBorder.radii().bottomRight().isZero()) 2019 findInnerVertex(outerRect.maxXMaxYCorner(), innerRect.maxXMaxYCorner(), centerPoint, quad[2]); 2020 break; 2021 } 2022 2023 // If the border matches both of its adjacent sides, don't anti-alias the clip, and 2024 // if neither side matches, anti-alias the clip. 2025 if (firstEdgeMatches == secondEdgeMatches) { 2026 graphicsContext->clipConvexPolygon(4, quad, !firstEdgeMatches); 2027 return; 2028 } 2029 2030 // Square off the end which shouldn't be affected by antialiasing, and clip. 2031 FloatPoint firstQuad[4]; 2032 firstQuad[0] = quad[0]; 2033 firstQuad[1] = quad[1]; 2034 firstQuad[2] = side == BSTop || side == BSBottom ? FloatPoint(quad[3].x(), quad[2].y()) 2035 : FloatPoint(quad[2].x(), quad[3].y()); 2036 firstQuad[3] = quad[3]; 2037 graphicsContext->clipConvexPolygon(4, firstQuad, !firstEdgeMatches); 2038 2039 FloatPoint secondQuad[4]; 2040 secondQuad[0] = quad[0]; 2041 secondQuad[1] = side == BSTop || side == BSBottom ? FloatPoint(quad[0].x(), quad[1].y()) 2042 : FloatPoint(quad[1].x(), quad[0].y()); 2043 secondQuad[2] = quad[2]; 2044 secondQuad[3] = quad[3]; 2045 // Antialiasing affects the second side. 2046 graphicsContext->clipConvexPolygon(4, secondQuad, !secondEdgeMatches); 2047 } 2048 2049 static inline IntRect areaCastingShadowInHole(const IntRect& holeRect, int shadowBlur, int shadowSpread, const IntSize& shadowOffset) 2050 { 2051 IntRect bounds(holeRect); 2052 2053 bounds.inflate(shadowBlur); 2054 2055 if (shadowSpread < 0) 2056 bounds.inflate(-shadowSpread); 2057 2058 IntRect offsetBounds = bounds; 2059 offsetBounds.move(-shadowOffset); 2060 return unionRect(bounds, offsetBounds); 2061 } 2062 2063 void RenderBoxModelObject::paintBoxShadow(GraphicsContext* context, int tx, int ty, int w, int h, const RenderStyle* s, ShadowStyle shadowStyle, bool includeLogicalLeftEdge, bool includeLogicalRightEdge) 2064 { 2065 // FIXME: Deal with border-image. Would be great to use border-image as a mask. 2066 2067 if (context->paintingDisabled() || !s->boxShadow()) 2068 return; 2069 2070 IntRect borderRect(tx, ty, w, h); 2071 RoundedIntRect border = (shadowStyle == Inset) ? s->getRoundedInnerBorderFor(borderRect, includeLogicalLeftEdge, includeLogicalRightEdge) 2072 : s->getRoundedBorderFor(borderRect, includeLogicalLeftEdge, includeLogicalRightEdge); 2073 2074 bool hasBorderRadius = s->hasBorderRadius(); 2075 bool isHorizontal = s->isHorizontalWritingMode(); 2076 2077 bool hasOpaqueBackground = s->visitedDependentColor(CSSPropertyBackgroundColor).isValid() && s->visitedDependentColor(CSSPropertyBackgroundColor).alpha() == 255; 2078 for (const ShadowData* shadow = s->boxShadow(); shadow; shadow = shadow->next()) { 2079 if (shadow->style() != shadowStyle) 2080 continue; 2081 2082 IntSize shadowOffset(shadow->x(), shadow->y()); 2083 int shadowBlur = shadow->blur(); 2084 int shadowSpread = shadow->spread(); 2085 const Color& shadowColor = shadow->color(); 2086 2087 if (shadow->style() == Normal) { 2088 RoundedIntRect fillRect = border; 2089 fillRect.inflate(shadowSpread); 2090 if (fillRect.isEmpty()) 2091 continue; 2092 2093 IntRect shadowRect(border.rect()); 2094 shadowRect.inflate(shadowBlur + shadowSpread); 2095 shadowRect.move(shadowOffset); 2096 2097 context->save(); 2098 context->clip(shadowRect); 2099 2100 // Move the fill just outside the clip, adding 1 pixel separation so that the fill does not 2101 // bleed in (due to antialiasing) if the context is transformed. 2102 IntSize extraOffset(w + max(0, shadowOffset.width()) + shadowBlur + 2 * shadowSpread + 1, 0); 2103 shadowOffset -= extraOffset; 2104 fillRect.move(extraOffset); 2105 2106 if (shadow->isWebkitBoxShadow()) 2107 context->setLegacyShadow(shadowOffset, shadowBlur, shadowColor, s->colorSpace()); 2108 else 2109 context->setShadow(shadowOffset, shadowBlur, shadowColor, s->colorSpace()); 2110 2111 if (hasBorderRadius) { 2112 RoundedIntRect rectToClipOut = border; 2113 2114 // If the box is opaque, it is unnecessary to clip it out. However, doing so saves time 2115 // when painting the shadow. On the other hand, it introduces subpixel gaps along the 2116 // corners. Those are avoided by insetting the clipping path by one pixel. 2117 if (hasOpaqueBackground) { 2118 rectToClipOut.inflateWithRadii(-1); 2119 } 2120 2121 if (!rectToClipOut.isEmpty()) 2122 context->clipOutRoundedRect(rectToClipOut); 2123 2124 fillRect.expandRadii(shadowSpread); 2125 context->fillRoundedRect(fillRect, Color::black, s->colorSpace()); 2126 } else { 2127 IntRect rectToClipOut = border.rect(); 2128 2129 // If the box is opaque, it is unnecessary to clip it out. However, doing so saves time 2130 // when painting the shadow. On the other hand, it introduces subpixel gaps along the 2131 // edges if they are not pixel-aligned. Those are avoided by insetting the clipping path 2132 // by one pixel. 2133 if (hasOpaqueBackground) { 2134 AffineTransform currentTransformation = context->getCTM(); 2135 if (currentTransformation.a() != 1 || (currentTransformation.d() != 1 && currentTransformation.d() != -1) 2136 || currentTransformation.b() || currentTransformation.c()) 2137 rectToClipOut.inflate(-1); 2138 } 2139 2140 if (!rectToClipOut.isEmpty()) 2141 context->clipOut(rectToClipOut); 2142 context->fillRect(fillRect.rect(), Color::black, s->colorSpace()); 2143 } 2144 2145 context->restore(); 2146 } else { 2147 // Inset shadow. 2148 IntRect holeRect(border.rect()); 2149 holeRect.inflate(-shadowSpread); 2150 2151 if (holeRect.isEmpty()) { 2152 if (hasBorderRadius) 2153 context->fillRoundedRect(border, shadowColor, s->colorSpace()); 2154 else 2155 context->fillRect(border.rect(), shadowColor, s->colorSpace()); 2156 continue; 2157 } 2158 2159 if (!includeLogicalLeftEdge) { 2160 if (isHorizontal) { 2161 holeRect.move(-max(shadowOffset.width(), 0) - shadowBlur, 0); 2162 holeRect.setWidth(holeRect.width() + max(shadowOffset.width(), 0) + shadowBlur); 2163 } else { 2164 holeRect.move(0, -max(shadowOffset.height(), 0) - shadowBlur); 2165 holeRect.setHeight(holeRect.height() + max(shadowOffset.height(), 0) + shadowBlur); 2166 } 2167 } 2168 if (!includeLogicalRightEdge) { 2169 if (isHorizontal) 2170 holeRect.setWidth(holeRect.width() - min(shadowOffset.width(), 0) + shadowBlur); 2171 else 2172 holeRect.setHeight(holeRect.height() - min(shadowOffset.height(), 0) + shadowBlur); 2173 } 2174 2175 Color fillColor(shadowColor.red(), shadowColor.green(), shadowColor.blue(), 255); 2176 2177 IntRect outerRect = areaCastingShadowInHole(border.rect(), shadowBlur, shadowSpread, shadowOffset); 2178 RoundedIntRect roundedHole(holeRect, border.radii()); 2179 2180 context->save(); 2181 2182 if (hasBorderRadius) { 2183 Path path; 2184 path.addRoundedRect(border); 2185 context->clip(path); 2186 roundedHole.shrinkRadii(shadowSpread); 2187 } else 2188 context->clip(border.rect()); 2189 2190 IntSize extraOffset(2 * w + max(0, shadowOffset.width()) + shadowBlur - 2 * shadowSpread + 1, 0); 2191 context->translate(extraOffset.width(), extraOffset.height()); 2192 shadowOffset -= extraOffset; 2193 2194 if (shadow->isWebkitBoxShadow()) 2195 context->setLegacyShadow(shadowOffset, shadowBlur, shadowColor, s->colorSpace()); 2196 else 2197 context->setShadow(shadowOffset, shadowBlur, shadowColor, s->colorSpace()); 2198 2199 context->fillRectWithRoundedHole(outerRect, roundedHole, fillColor, s->colorSpace()); 2200 2201 context->restore(); 2202 } 2203 } 2204 } 2205 2206 int RenderBoxModelObject::containingBlockLogicalWidthForContent() const 2207 { 2208 return containingBlock()->availableLogicalWidth(); 2209 } 2210 2211 RenderBoxModelObject* RenderBoxModelObject::continuation() const 2212 { 2213 if (!continuationMap) 2214 return 0; 2215 return continuationMap->get(this); 2216 } 2217 2218 void RenderBoxModelObject::setContinuation(RenderBoxModelObject* continuation) 2219 { 2220 if (continuation) { 2221 if (!continuationMap) 2222 continuationMap = new ContinuationMap; 2223 continuationMap->set(this, continuation); 2224 } else { 2225 if (continuationMap) 2226 continuationMap->remove(this); 2227 } 2228 } 2229 2230 } // namespace WebCore 2231
