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| 1 // Copyright 2014 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #include "config.h" | |
| 6 #include "core/paint/LayerClipRecorder.h" | |
| 7 | |
| 8 #include "core/paint/ClipRecorder.h" | |
| 9 #include "core/rendering/ClipRect.h" | |
| 10 #include "core/rendering/RenderLayer.h" | |
| 11 #include "core/rendering/RenderView.h" | |
| 12 #include "platform/RuntimeEnabledFeatures.h" | |
| 13 #include "platform/geometry/IntRect.h" | |
| 14 #include "platform/graphics/GraphicsContext.h" | |
| 15 | |
| 16 namespace blink { | |
| 17 | |
| 18 void ClipDisplayItem::replay(GraphicsContext* context) | |
| 19 { | |
| 20 context->save(); | |
| 21 context->clip(m_clipRect); | |
| 22 for (RoundedRect roundedRect : m_roundedRectClips) | |
| 23 context->clipRoundedRect(roundedRect); | |
| 24 } | |
| 25 | |
| 26 void EndClipDisplayItem::replay(GraphicsContext* context) | |
| 27 { | |
| 28 context->restore(); | |
| 29 } | |
| 30 | |
| 31 LayerClipRecorder::LayerClipRecorder(const RenderLayerModelObject* renderer, Gra
phicsContext* graphicsContext, DisplayItem::Type clipType, const ClipRect& clipR
ect, | |
| 32 const LayerPaintingInfo* localPaintingInfo, const LayoutPoint& fragmentOffse
t, PaintLayerFlags paintFlags, BorderRadiusClippingRule rule) | |
| 33 : m_graphicsContext(graphicsContext) | |
| 34 , m_renderer(renderer) | |
| 35 { | |
| 36 IntRect snappedClipRect = pixelSnappedIntRect(clipRect.rect()); | |
| 37 OwnPtr<ClipDisplayItem> clipDisplayItem = adoptPtr(new ClipDisplayItem(rende
rer, clipType, snappedClipRect)); | |
| 38 if (localPaintingInfo && clipRect.hasRadius()) | |
| 39 collectRoundedRectClips(*renderer->layer(), *localPaintingInfo, graphics
Context, fragmentOffset, paintFlags, rule, clipDisplayItem->roundedRectClips()); | |
| 40 if (!RuntimeEnabledFeatures::slimmingPaintEnabled()) { | |
| 41 clipDisplayItem->replay(graphicsContext); | |
| 42 } else { | |
| 43 m_renderer->view()->viewDisplayList().add(clipDisplayItem.release()); | |
| 44 } | |
| 45 } | |
| 46 | |
| 47 static bool inContainingBlockChain(RenderLayer* startLayer, RenderLayer* endLaye
r) | |
| 48 { | |
| 49 if (startLayer == endLayer) | |
| 50 return true; | |
| 51 | |
| 52 RenderView* view = startLayer->renderer()->view(); | |
| 53 for (RenderBlock* currentBlock = startLayer->renderer()->containingBlock();
currentBlock && currentBlock != view; currentBlock = currentBlock->containingBlo
ck()) { | |
| 54 if (currentBlock->layer() == endLayer) | |
| 55 return true; | |
| 56 } | |
| 57 | |
| 58 return false; | |
| 59 } | |
| 60 | |
| 61 void LayerClipRecorder::collectRoundedRectClips(RenderLayer& renderLayer, const
LayerPaintingInfo& localPaintingInfo, GraphicsContext* context, const LayoutPoin
t& fragmentOffset, PaintLayerFlags paintFlags, | |
| 62 BorderRadiusClippingRule rule, Vector<RoundedRect>& roundedRectClips) | |
| 63 { | |
| 64 // If the clip rect has been tainted by a border radius, then we have to wal
k up our layer chain applying the clips from | |
| 65 // any layers with overflow. The condition for being able to apply these cli
ps is that the overflow object be in our | |
| 66 // containing block chain so we check that also. | |
| 67 for (RenderLayer* layer = rule == IncludeSelfForBorderRadius ? &renderLayer
: renderLayer.parent(); layer; layer = layer->parent()) { | |
| 68 // Composited scrolling layers handle border-radius clip in the composit
or via a mask layer. We do not | |
| 69 // want to apply a border-radius clip to the layer contents itself, beca
use that would require re-rastering | |
| 70 // every frame to update the clip. We only want to make sure that the ma
sk layer is properly clipped so | |
| 71 // that it can in turn clip the scrolled contents in the compositor. | |
| 72 if (layer->needsCompositedScrolling() && !(paintFlags & PaintLayerPainti
ngChildClippingMaskPhase)) | |
| 73 break; | |
| 74 | |
| 75 if (layer->renderer()->hasOverflowClip() && layer->renderer()->style()->
hasBorderRadius() && inContainingBlockChain(&renderLayer, layer)) { | |
| 76 LayoutPoint delta(fragmentOffset); | |
| 77 layer->convertToLayerCoords(localPaintingInfo.rootLayer, delta); | |
| 78 roundedRectClips.append(layer->renderer()->style()->getRoundedInnerB
orderFor(LayoutRect(delta, LayoutSize(layer->size())))); | |
| 79 } | |
| 80 | |
| 81 if (layer == localPaintingInfo.rootLayer) | |
| 82 break; | |
| 83 } | |
| 84 } | |
| 85 | |
| 86 LayerClipRecorder::~LayerClipRecorder() | |
| 87 { | |
| 88 if (RuntimeEnabledFeatures::slimmingPaintEnabled()) { | |
| 89 OwnPtr<EndClipDisplayItem> endClip = adoptPtr(new EndClipDisplayItem(m_r
enderer)); | |
| 90 m_renderer->view()->viewDisplayList().add(endClip.release()); | |
| 91 } else { | |
| 92 m_graphicsContext->restore(); | |
| 93 } | |
| 94 } | |
| 95 | |
| 96 #ifndef NDEBUG | |
| 97 WTF::String ClipDisplayItem::asDebugString() const | |
| 98 { | |
| 99 return String::format("{%s, type: \"%s\", clipRect: [%d,%d,%d,%d]}", | |
| 100 rendererDebugString(renderer()).utf8().data(), typeAsDebugString(type())
.utf8().data(), | |
| 101 m_clipRect.x(), m_clipRect.y(), m_clipRect.width(), m_clipRect.height())
; | |
| 102 } | |
| 103 #endif | |
| 104 | |
| 105 } // namespace blink | |
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Chromium Code Reviews
Issue 757183003:
Revert of Enable fast/images with slimming paint (Closed)
Base URL: svn://svn.chromium.org/blink/trunk