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e0fd75b5ab
This caused us to lose our gn check certification. :( Turns out gn check was just ignoring all the header paths it didn't understand and so gn check passing for sky wasn't meaning much. I tried to straighten out some of the mess in this CL, but its going to take several more rounds of massaging before gn check passes again. On the bright side (almost) all of our headers are absolute now. Turns out my script (attached to the bug) didn't notice ../ includes but I'll fix that in the next patch. R=abarth@chromium.org BUG=435361 Review URL: https://codereview.chromium.org/746023002
143 lines
4.9 KiB
C++
143 lines
4.9 KiB
C++
/*
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Copyright (C) 2012 Google Inc. All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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1. Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
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EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
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DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "sky/engine/config.h"
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#include "sky/engine/platform/graphics/Canvas2DLayerManager.h"
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#include "sky/engine/public/platform/Platform.h"
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#include "sky/engine/wtf/StdLibExtras.h"
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namespace {
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enum {
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DefaultMaxBytesAllocated = 64*1024*1024,
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DefaultTargetBytesAllocated = 16*1024*1024,
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};
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} // unnamed namespace
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namespace blink {
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Canvas2DLayerManager::Canvas2DLayerManager()
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: m_bytesAllocated(0)
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, m_maxBytesAllocated(DefaultMaxBytesAllocated)
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, m_targetBytesAllocated(DefaultTargetBytesAllocated)
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, m_limitPendingFramesTimer(this, &Canvas2DLayerManager::limitPendingFramesTimerFired)
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{
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}
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Canvas2DLayerManager::~Canvas2DLayerManager()
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{
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ASSERT(!m_bytesAllocated);
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ASSERT(!m_layerList.head());
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}
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void Canvas2DLayerManager::init(size_t maxBytesAllocated, size_t targetBytesAllocated)
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{
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ASSERT(maxBytesAllocated >= targetBytesAllocated);
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m_maxBytesAllocated = maxBytesAllocated;
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m_targetBytesAllocated = targetBytesAllocated;
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if (m_limitPendingFramesTimer.isActive())
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m_limitPendingFramesTimer.stop();
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}
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Canvas2DLayerManager& Canvas2DLayerManager::get()
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{
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DEFINE_STATIC_LOCAL(Canvas2DLayerManager, manager, ());
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return manager;
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}
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void Canvas2DLayerManager::limitPendingFramesTimerFired(Timer<Canvas2DLayerManager>*)
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{
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Canvas2DLayerBridge* layer = m_layerList.head();
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while (layer) {
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Canvas2DLayerBridge* currentLayer = layer;
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// must increment iterator before calling limitPendingFrames, which
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// may result in the layer being removed from the list.
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layer = layer->next();
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currentLayer->limitPendingFrames();
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}
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}
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void Canvas2DLayerManager::layerDidDraw(Canvas2DLayerBridge* layer)
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{
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if (isInList(layer)) {
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if (layer != m_layerList.head()) {
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m_layerList.remove(layer);
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m_layerList.push(layer); // Set as MRU
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}
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}
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if (!m_limitPendingFramesTimer.isActive())
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m_limitPendingFramesTimer.startOneShot(0, FROM_HERE);
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}
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void Canvas2DLayerManager::layerTransientResourceAllocationChanged(Canvas2DLayerBridge* layer, intptr_t deltaBytes)
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{
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ASSERT((intptr_t)m_bytesAllocated + deltaBytes >= 0);
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m_bytesAllocated = (intptr_t)m_bytesAllocated + deltaBytes;
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if (!isInList(layer) && layer->hasTransientResources()) {
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m_layerList.push(layer);
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} else if (isInList(layer) && !layer->hasTransientResources()) {
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m_layerList.remove(layer);
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layer->setNext(0);
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layer->setPrev(0);
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}
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if (deltaBytes > 0)
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freeMemoryIfNecessary();
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}
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void Canvas2DLayerManager::freeMemoryIfNecessary()
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{
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if (m_bytesAllocated >= m_maxBytesAllocated) {
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// Pass 1: Free memory from caches
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Canvas2DLayerBridge* layer = m_layerList.tail(); // LRU
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while (layer && m_bytesAllocated > m_targetBytesAllocated) {
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Canvas2DLayerBridge* currentLayer = layer;
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layer = layer->prev();
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currentLayer->freeMemoryIfPossible(m_bytesAllocated - m_targetBytesAllocated);
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ASSERT(isInList(currentLayer) == currentLayer->hasTransientResources());
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}
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// Pass 2: Flush canvases
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layer = m_layerList.tail();
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while (m_bytesAllocated > m_targetBytesAllocated && layer) {
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Canvas2DLayerBridge* currentLayer = layer;
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layer = layer->prev();
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currentLayer->flush();
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currentLayer->freeMemoryIfPossible(m_bytesAllocated - m_targetBytesAllocated);
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ASSERT(isInList(currentLayer) == currentLayer->hasTransientResources());
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}
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}
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}
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bool Canvas2DLayerManager::isInList(Canvas2DLayerBridge* layer) const
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{
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return layer->prev() || m_layerList.head() == layer;
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}
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} // namespace blink
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