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1 /* | 1 /* |
2 * Copyright (C) 2009, 2010, 2011 Apple Inc. All rights reserved. | 2 * Copyright (C) 2009, 2010, 2011 Apple Inc. All rights reserved. |
3 * | 3 * |
4 * Redistribution and use in source and binary forms, with or without | 4 * Redistribution and use in source and binary forms, with or without |
5 * modification, are permitted provided that the following conditions | 5 * modification, are permitted provided that the following conditions |
6 * are met: | 6 * are met: |
7 * 1. Redistributions of source code must retain the above copyright | 7 * 1. Redistributions of source code must retain the above copyright |
8 * notice, this list of conditions and the following disclaimer. | 8 * notice, this list of conditions and the following disclaimer. |
9 * 2. Redistributions in binary form must reproduce the above copyright | 9 * 2. Redistributions in binary form must reproduce the above copyright |
10 * notice, this list of conditions and the following disclaimer in the | 10 * notice, this list of conditions and the following disclaimer in the |
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2278 if (!scrollbar) | 2278 if (!scrollbar) |
2279 return; | 2279 return; |
2280 | 2280 |
2281 const IntRect& scrollbarRect = scrollbar->frameRect(); | 2281 const IntRect& scrollbarRect = scrollbar->frameRect(); |
2282 TransformRecorder transformRecorder(context, *scrollbar, AffineTransform::tr anslation(-scrollbarRect.x(), -scrollbarRect.y())); | 2282 TransformRecorder transformRecorder(context, *scrollbar, AffineTransform::tr anslation(-scrollbarRect.x(), -scrollbarRect.y())); |
2283 IntRect transformedClip = clip; | 2283 IntRect transformedClip = clip; |
2284 transformedClip.moveBy(scrollbarRect.location()); | 2284 transformedClip.moveBy(scrollbarRect.location()); |
2285 scrollbar->paint(context, CullRect(transformedClip)); | 2285 scrollbar->paint(context, CullRect(transformedClip)); |
2286 } | 2286 } |
2287 | 2287 |
2288 // TODO(eseckler): Make recording distance configurable, e.g. for use in | |
2289 // headless, where we would like to record an exact area (distance = 0). | |
2288 static const int kPixelDistanceToRecord = 4000; | 2290 static const int kPixelDistanceToRecord = 4000; |
2289 | 2291 |
2290 IntRect CompositedLayerMapping::recomputeInterestRect(const GraphicsLayer* graph icsLayer) const | 2292 IntRect CompositedLayerMapping::recomputeInterestRect(const GraphicsLayer* graph icsLayer) const |
2291 { | 2293 { |
2292 FloatRect graphicsLayerBounds(FloatPoint(), graphicsLayer->size()); | 2294 FloatRect graphicsLayerBounds(FloatPoint(), graphicsLayer->size()); |
2293 | 2295 |
2294 IntSize offsetFromAnchorLayoutObject; | 2296 IntSize offsetFromAnchorLayoutObject; |
2295 const LayoutBoxModelObject* anchorLayoutObject; | 2297 const LayoutBoxModelObject* anchorLayoutObject; |
2296 if (graphicsLayer == m_squashingLayer.get()) { | 2298 if (graphicsLayer == m_squashingLayer.get()) { |
2297 // TODO(chrishtr): this is a speculative fix for crbug.com/561306. Howev er, it should never be the case that | 2299 // TODO(chrishtr): this is a speculative fix for crbug.com/561306. Howev er, it should never be the case that |
2298 // m_squashingLayer exists yet m_squashedLayers.size() == 0. There must be a bug elsewhere. | 2300 // m_squashingLayer exists yet m_squashedLayers.size() == 0. There must be a bug elsewhere. |
2299 if (m_squashedLayers.size() == 0) | 2301 if (m_squashedLayers.size() == 0) |
2300 return IntRect(); | 2302 return IntRect(); |
2301 // All squashed layers have the same clip and transform space, so we can use the first squashed layer's | 2303 // All squashed layers have the same clip and transform space, so we can use the first squashed layer's |
2302 // layoutObject to map the squashing layer's bounds into viewport space, with offsetFromAnchorLayoutObject | 2304 // layoutObject to map the squashing layer's bounds into viewport space, with offsetFromAnchorLayoutObject |
2303 // to translate squashing layer's bounds into the first squashed layer's space. | 2305 // to translate squashing layer's bounds into the first squashed layer's space. |
2304 anchorLayoutObject = m_squashedLayers[0].paintLayer->layoutObject(); | 2306 anchorLayoutObject = m_squashedLayers[0].paintLayer->layoutObject(); |
2305 offsetFromAnchorLayoutObject = m_squashedLayers[0].offsetFromLayoutObjec t; | 2307 offsetFromAnchorLayoutObject = m_squashedLayers[0].offsetFromLayoutObjec t; |
2306 } else { | 2308 } else { |
2307 ASSERT(graphicsLayer == m_graphicsLayer.get() || graphicsLayer == m_scro llingContentsLayer.get()); | 2309 ASSERT(graphicsLayer == m_graphicsLayer.get() || graphicsLayer == m_scro llingContentsLayer.get()); |
2308 anchorLayoutObject = m_owningLayer.layoutObject(); | 2310 anchorLayoutObject = m_owningLayer.layoutObject(); |
2309 offsetFromAnchorLayoutObject = graphicsLayer->offsetFromLayoutObject(); | 2311 offsetFromAnchorLayoutObject = graphicsLayer->offsetFromLayoutObject(); |
2310 adjustForCompositedScrolling(graphicsLayer, offsetFromAnchorLayoutObject ); | 2312 adjustForCompositedScrolling(graphicsLayer, offsetFromAnchorLayoutObject ); |
2311 } | 2313 } |
2312 | 2314 |
2313 // Start with the bounds of the graphics layer in the space of the anchor La youtObject. | 2315 // Start with the bounds of the graphics layer in the space of the anchor La youtObject. |
2314 FloatRect graphicsLayerBoundsInObjectSpace(graphicsLayerBounds); | 2316 FloatRect graphicsLayerBoundsInObjectSpace(graphicsLayerBounds); |
2315 graphicsLayerBoundsInObjectSpace.move(offsetFromAnchorLayoutObject); | 2317 graphicsLayerBoundsInObjectSpace.move(offsetFromAnchorLayoutObject); |
2316 | 2318 |
2317 // Now map the bounds to its visible content rect in screen space, including applying clips along the way. | 2319 // Now map the bounds to its visible content rect in root view space, includ ing applying clips along the way. |
2318 LayoutRect visibleContentRect(graphicsLayerBoundsInObjectSpace); | 2320 LayoutRect graphicsLayerBoundsInRootViewSpace(graphicsLayerBoundsInObjectSpa ce); |
2319 LayoutView* rootView = anchorLayoutObject->view(); | 2321 LayoutView* rootView = anchorLayoutObject->view(); |
2320 while (rootView->frame()->ownerLayoutObject()) | 2322 while (rootView->frame()->ownerLayoutObject()) |
2321 rootView = rootView->frame()->ownerLayoutObject()->view(); | 2323 rootView = rootView->frame()->ownerLayoutObject()->view(); |
2322 anchorLayoutObject->mapToVisualRectInAncestorSpace(rootView, visibleContentR ect); | 2324 anchorLayoutObject->mapToVisualRectInAncestorSpace(rootView, graphicsLayerBo undsInRootViewSpace); |
2323 visibleContentRect.intersect(LayoutRect(rootView->frameView()->visibleConten tRect())); | 2325 FloatRect visibleContentRect(graphicsLayerBoundsInRootViewSpace); |
2326 rootView->frameView()->clipPaintRect(&visibleContentRect); | |
2324 | 2327 |
2325 IntRect enclosingGraphicsLayerBounds(enclosingIntRect(graphicsLayerBounds)); | 2328 IntRect enclosingGraphicsLayerBounds(enclosingIntRect(graphicsLayerBounds)); |
2326 | 2329 |
2327 // Map the visible content rect from screen space to local graphics layer sp ace. | 2330 // Map the visible content rect from root view space to local graphics layer space. |
2328 IntRect localInterestRect; | 2331 IntRect localInterestRect; |
2329 // If the visible content rect is empty, then it makes no sense to map it ba ck since there is nothing to map. | 2332 // If the visible content rect is empty, then it makes no sense to map it ba ck since there is nothing to map. |
2330 if (!visibleContentRect.isEmpty()) { | 2333 if (!visibleContentRect.isEmpty()) { |
2331 localInterestRect = anchorLayoutObject->absoluteToLocalQuad(FloatRect(vi sibleContentRect), UseTransforms | TraverseDocumentBoundaries).enclosingBounding Box(); | 2334 localInterestRect = anchorLayoutObject->absoluteToLocalQuad(visibleConte ntRect, UseTransforms | TraverseDocumentBoundaries).enclosingBoundingBox(); |
2332 localInterestRect.move(-offsetFromAnchorLayoutObject); | 2335 localInterestRect.move(-offsetFromAnchorLayoutObject); |
2333 // TODO(chrishtr): the code below is a heuristic, instead we should dete ct and return whether the mapping failed. | 2336 // TODO(chrishtr): the code below is a heuristic, instead we should dete ct and return whether the mapping failed. |
2334 // In some cases, absoluteToLocalQuad can fail to map back to the local space, due to passing through | 2337 // In some cases, absoluteToLocalQuad can fail to map back to the local space, due to passing through |
2335 // non-invertible transforms or floating-point accuracy issues. Examples include rotation near 90 degrees | 2338 // non-invertible transforms or floating-point accuracy issues. Examples include rotation near 90 degrees |
2336 // or perspective. In such cases, fall back to painting the first kPixel DistanceToRecord pixels in each direction. | 2339 // or perspective. In such cases, fall back to painting the first kPixel DistanceToRecord pixels in each direction. |
2337 localInterestRect.intersect(enclosingGraphicsLayerBounds); | 2340 localInterestRect.intersect(enclosingGraphicsLayerBounds); |
2338 } | 2341 } |
2339 // Expand by interest rect padding amount. | 2342 // Expand by interest rect padding amount. |
2340 localInterestRect.inflate(kPixelDistanceToRecord); | 2343 localInterestRect.inflate(kPixelDistanceToRecord); |
2341 localInterestRect.intersect(enclosingGraphicsLayerBounds); | 2344 localInterestRect.intersect(enclosingGraphicsLayerBounds); |
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2373 if (newInterestRect.maxY() == layerSize.height() && previousInterestRect.max Y() != layerSize.height()) | 2376 if (newInterestRect.maxY() == layerSize.height() && previousInterestRect.max Y() != layerSize.height()) |
2374 return true; | 2377 return true; |
2375 | 2378 |
2376 return false; | 2379 return false; |
2377 } | 2380 } |
2378 | 2381 |
2379 IntRect CompositedLayerMapping::computeInterestRect(const GraphicsLayer* graphic sLayer, const IntRect& previousInterestRect) const | 2382 IntRect CompositedLayerMapping::computeInterestRect(const GraphicsLayer* graphic sLayer, const IntRect& previousInterestRect) const |
2380 { | 2383 { |
2381 // Use the previous interest rect if it covers the whole layer. | 2384 // Use the previous interest rect if it covers the whole layer. |
2382 IntRect wholeLayerRect = IntRect(IntPoint(), expandedIntSize(graphicsLayer-> size())); | 2385 IntRect wholeLayerRect = IntRect(IntPoint(), expandedIntSize(graphicsLayer-> size())); |
2383 if (!needsRepaint(*graphicsLayer) && previousInterestRect == wholeLayerRect) | 2386 if (!needsRepaint(*graphicsLayer) && previousInterestRect == wholeLayerRect) |
dgozman
2016/08/29 20:45:36
I'm curios what happens if you forceViewport to co
Eric Seckler
2016/09/12 13:58:00
I think you're right, the logic for replacing old
chrishtr
2016/09/13 00:49:18
https://codereview.chromium.org/1441973003 is what
Xianzhu
2016/09/13 01:20:11
The behavior is mainly for performance. See https:
| |
2384 return previousInterestRect; | 2387 return previousInterestRect; |
2385 | 2388 |
2386 // Paint the whole layer if "mainFrameClipsContent" is false, meaning that W ebPreferences::record_whole_document is true. | 2389 if (graphicsLayer != m_graphicsLayer.get() && graphicsLayer != m_squashingLa yer.get() && graphicsLayer != m_scrollingContentsLayer.get()) |
2387 bool shouldPaintWholePage = !m_owningLayer.layoutObject()->document().settin gs()->mainFrameClipsContent(); | |
2388 if (shouldPaintWholePage | |
2389 || (graphicsLayer != m_graphicsLayer.get() && graphicsLayer != m_squashi ngLayer.get() && graphicsLayer != m_scrollingContentsLayer.get())) | |
2390 return wholeLayerRect; | 2390 return wholeLayerRect; |
2391 | 2391 |
2392 IntRect newInterestRect = recomputeInterestRect(graphicsLayer); | 2392 IntRect newInterestRect = recomputeInterestRect(graphicsLayer); |
2393 if (interestRectChangedEnoughToRepaint(previousInterestRect, newInterestRect , expandedIntSize(graphicsLayer->size()))) | 2393 if (interestRectChangedEnoughToRepaint(previousInterestRect, newInterestRect , expandedIntSize(graphicsLayer->size()))) |
2394 return newInterestRect; | 2394 return newInterestRect; |
2395 return previousInterestRect; | 2395 return previousInterestRect; |
2396 } | 2396 } |
2397 | 2397 |
2398 LayoutSize CompositedLayerMapping::subpixelAccumulation() const | 2398 LayoutSize CompositedLayerMapping::subpixelAccumulation() const |
2399 { | 2399 { |
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2694 } else if (graphicsLayer == m_scrollingContentsLayer.get()) { | 2694 } else if (graphicsLayer == m_scrollingContentsLayer.get()) { |
2695 name = "Scrolling Contents Layer"; | 2695 name = "Scrolling Contents Layer"; |
2696 } else { | 2696 } else { |
2697 ASSERT_NOT_REACHED(); | 2697 ASSERT_NOT_REACHED(); |
2698 } | 2698 } |
2699 | 2699 |
2700 return name; | 2700 return name; |
2701 } | 2701 } |
2702 | 2702 |
2703 } // namespace blink | 2703 } // namespace blink |
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