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/*
* Copyright (C) 2009, 2010 Apple Inc. All rights reserved.
* Copyright (C) 2014 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "core/rendering/compositing/GraphicsLayerUpdater.h"
#include "core/html/HTMLMediaElement.h"
#include "core/rendering/RenderLayer.h"
#include "core/rendering/RenderLayerReflectionInfo.h"
#include "core/rendering/RenderPart.h"
#include "core/rendering/compositing/CompositedLayerMapping.h"
#include "core/rendering/compositing/RenderLayerCompositor.h"
namespace WebCore {
GraphicsLayerUpdater::UpdateContext::UpdateContext(const UpdateContext& other, const RenderLayer& layer)
: m_compositingStackingContext(other.m_compositingStackingContext)
, m_compositingAncestor(other.compositingContainer(layer))
{
CompositingState compositingState = layer.compositingState();
if (compositingState != NotComposited && compositingState != PaintsIntoGroupedBacking) {
m_compositingAncestor = &layer;
if (layer.stackingNode()->isStackingContext())
m_compositingStackingContext = &layer;
}
}
const RenderLayer* GraphicsLayerUpdater::UpdateContext::compositingContainer(const RenderLayer& layer) const
{
return layer.stackingNode()->isNormalFlowOnly() ? m_compositingAncestor : m_compositingStackingContext;
}
GraphicsLayerUpdater::GraphicsLayerUpdater()
: m_needsRebuildTree(false)
{
}
GraphicsLayerUpdater::~GraphicsLayerUpdater()
{
}
void GraphicsLayerUpdater::update(Vector<RenderLayer*>& layersNeedingPaintInvalidation, RenderLayer& layer, UpdateType updateType, const UpdateContext& context)
{
if (layer.hasCompositedLayerMapping()) {
CompositedLayerMappingPtr mapping = layer.compositedLayerMapping();
const RenderLayer* compositingContainer = context.compositingContainer(layer);
ASSERT(compositingContainer == layer.ancestorCompositingLayer());
if (mapping->updateRequiresOwnBackingStoreForAncestorReasons(compositingContainer))
updateType = ForceUpdate;
// Note carefully: here we assume that the compositing state of all descendants have been updated already,
// so it is legitimate to compute and cache the composited bounds for this layer.
mapping->updateCompositedBounds(updateType);
if (RenderLayerReflectionInfo* reflection = layer.reflectionInfo()) {
if (reflection->reflectionLayer()->hasCompositedLayerMapping())
reflection->reflectionLayer()->compositedLayerMapping()->updateCompositedBounds(ForceUpdate);
}
if (mapping->updateGraphicsLayerConfiguration(updateType))
m_needsRebuildTree = true;
mapping->updateGraphicsLayerGeometry(updateType, compositingContainer, layersNeedingPaintInvalidation);
updateType = mapping->updateTypeForChildren(updateType);
mapping->clearNeedsGraphicsLayerUpdate();
if (!layer.parent())
layer.compositor()->updateRootLayerPosition();
if (mapping->hasUnpositionedOverflowControlsLayers())
layer.scrollableArea()->positionOverflowControls(IntSize());
}
UpdateContext childContext(context, layer);
for (RenderLayer* child = layer.firstChild(); child; child = child->nextSibling())
update(layersNeedingPaintInvalidation, *child, updateType, childContext);
}
#if ASSERT_ENABLED
void GraphicsLayerUpdater::assertNeedsToUpdateGraphicsLayerBitsCleared(RenderLayer& layer)
{
if (layer.hasCompositedLayerMapping())
layer.compositedLayerMapping()->assertNeedsToUpdateGraphicsLayerBitsCleared();
for (RenderLayer* child = layer.firstChild(); child; child = child->nextSibling())
assertNeedsToUpdateGraphicsLayerBitsCleared(*child);
}
#endif
} // namespace WebCore
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