DrawingAreaProxyImpl.cpp [plain text]
#include "config.h"
#include "DrawingAreaProxyImpl.h"
#include "DrawingAreaMessages.h"
#include "DrawingAreaProxyMessages.h"
#include "LayerTreeContext.h"
#include "UpdateInfo.h"
#include "WebPageGroup.h"
#include "WebPageProxy.h"
#include "WebPreferences.h"
#include "WebProcessProxy.h"
#include <WebCore/Region.h>
using namespace WebCore;
namespace WebKit {
DrawingAreaProxyImpl::DrawingAreaProxyImpl(WebPageProxy& webPageProxy)
: DrawingAreaProxy(DrawingAreaTypeImpl, webPageProxy)
, m_currentBackingStoreStateID(0)
, m_nextBackingStoreStateID(0)
, m_isWaitingForDidUpdateBackingStoreState(false)
, m_hasReceivedFirstUpdate(false)
, m_isBackingStoreDiscardable(true)
, m_discardBackingStoreTimer(RunLoop::current(), this, &DrawingAreaProxyImpl::discardBackingStore)
{
}
DrawingAreaProxyImpl::~DrawingAreaProxyImpl()
{
if (isInAcceleratedCompositingMode())
exitAcceleratedCompositingMode();
}
void DrawingAreaProxyImpl::paint(BackingStore::PlatformGraphicsContext context, const IntRect& rect, Region& unpaintedRegion)
{
unpaintedRegion = rect;
if (isInAcceleratedCompositingMode())
return;
ASSERT(m_currentBackingStoreStateID <= m_nextBackingStoreStateID);
if (m_currentBackingStoreStateID < m_nextBackingStoreStateID) {
sendUpdateBackingStoreState(RespondImmediately);
if (!m_hasReceivedFirstUpdate)
return;
if (m_isWaitingForDidUpdateBackingStoreState) {
waitForAndDispatchDidUpdateBackingStoreState();
}
if (!m_backingStore || isInAcceleratedCompositingMode())
return;
} else {
ASSERT(!m_isWaitingForDidUpdateBackingStoreState);
if (!m_backingStore) {
return;
}
}
m_backingStore->paint(context, rect);
unpaintedRegion.subtract(IntRect(IntPoint(), m_backingStore->size()));
discardBackingStoreSoon();
}
void DrawingAreaProxyImpl::sizeDidChange()
{
backingStoreStateDidChange(RespondImmediately);
}
void DrawingAreaProxyImpl::deviceScaleFactorDidChange()
{
backingStoreStateDidChange(RespondImmediately);
}
void DrawingAreaProxyImpl::setBackingStoreIsDiscardable(bool isBackingStoreDiscardable)
{
if (m_isBackingStoreDiscardable == isBackingStoreDiscardable)
return;
m_isBackingStoreDiscardable = isBackingStoreDiscardable;
if (m_isBackingStoreDiscardable)
discardBackingStoreSoon();
else
m_discardBackingStoreTimer.stop();
}
void DrawingAreaProxyImpl::waitForBackingStoreUpdateOnNextPaint()
{
m_hasReceivedFirstUpdate = true;
}
void DrawingAreaProxyImpl::update(uint64_t backingStoreStateID, const UpdateInfo& updateInfo)
{
ASSERT_ARG(backingStoreStateID, backingStoreStateID <= m_currentBackingStoreStateID);
if (backingStoreStateID < m_currentBackingStoreStateID)
return;
incorporateUpdate(updateInfo);
m_webPageProxy.process().send(Messages::DrawingArea::DidUpdate(), m_webPageProxy.pageID());
}
void DrawingAreaProxyImpl::didUpdateBackingStoreState(uint64_t backingStoreStateID, const UpdateInfo& updateInfo, const LayerTreeContext& layerTreeContext)
{
ASSERT_ARG(backingStoreStateID, backingStoreStateID <= m_nextBackingStoreStateID);
ASSERT_ARG(backingStoreStateID, backingStoreStateID > m_currentBackingStoreStateID);
m_currentBackingStoreStateID = backingStoreStateID;
m_isWaitingForDidUpdateBackingStoreState = false;
m_webPageProxy.process().responsivenessTimer()->stop();
if (layerTreeContext != m_layerTreeContext) {
if (!m_layerTreeContext.isEmpty()) {
exitAcceleratedCompositingMode();
ASSERT(m_layerTreeContext.isEmpty());
}
if (!layerTreeContext.isEmpty()) {
enterAcceleratedCompositingMode(layerTreeContext);
ASSERT(layerTreeContext == m_layerTreeContext);
}
}
if (m_nextBackingStoreStateID != m_currentBackingStoreStateID)
sendUpdateBackingStoreState(RespondImmediately);
else
m_hasReceivedFirstUpdate = true;
if (isInAcceleratedCompositingMode()) {
ASSERT(!m_backingStore);
return;
}
if (m_backingStore && (m_backingStore->size() != updateInfo.viewSize || m_backingStore->deviceScaleFactor() != updateInfo.deviceScaleFactor))
m_backingStore = nullptr;
incorporateUpdate(updateInfo);
}
void DrawingAreaProxyImpl::enterAcceleratedCompositingMode(uint64_t backingStoreStateID, const LayerTreeContext& layerTreeContext)
{
ASSERT_ARG(backingStoreStateID, backingStoreStateID <= m_currentBackingStoreStateID);
if (backingStoreStateID < m_currentBackingStoreStateID)
return;
enterAcceleratedCompositingMode(layerTreeContext);
}
void DrawingAreaProxyImpl::exitAcceleratedCompositingMode(uint64_t backingStoreStateID, const UpdateInfo& updateInfo)
{
ASSERT_ARG(backingStoreStateID, backingStoreStateID <= m_currentBackingStoreStateID);
if (backingStoreStateID < m_currentBackingStoreStateID)
return;
exitAcceleratedCompositingMode();
incorporateUpdate(updateInfo);
}
void DrawingAreaProxyImpl::updateAcceleratedCompositingMode(uint64_t backingStoreStateID, const LayerTreeContext& layerTreeContext)
{
ASSERT_ARG(backingStoreStateID, backingStoreStateID <= m_currentBackingStoreStateID);
if (backingStoreStateID < m_currentBackingStoreStateID)
return;
updateAcceleratedCompositingMode(layerTreeContext);
}
void DrawingAreaProxyImpl::incorporateUpdate(const UpdateInfo& updateInfo)
{
ASSERT(!isInAcceleratedCompositingMode());
if (updateInfo.updateRectBounds.isEmpty())
return;
if (!m_backingStore)
m_backingStore = std::make_unique<BackingStore>(updateInfo.viewSize, updateInfo.deviceScaleFactor, m_webPageProxy);
m_backingStore->incorporateUpdate(updateInfo);
bool shouldScroll = !updateInfo.scrollRect.isEmpty();
if (shouldScroll)
m_webPageProxy.scrollView(updateInfo.scrollRect, updateInfo.scrollOffset);
if (shouldScroll && !m_webPageProxy.canScrollView())
m_webPageProxy.setViewNeedsDisplay(IntRect(IntPoint(), m_webPageProxy.viewSize()));
else {
for (size_t i = 0; i < updateInfo.updateRects.size(); ++i)
m_webPageProxy.setViewNeedsDisplay(updateInfo.updateRects[i]);
}
if (shouldScroll)
m_webPageProxy.displayView();
}
void DrawingAreaProxyImpl::backingStoreStateDidChange(RespondImmediatelyOrNot respondImmediatelyOrNot)
{
++m_nextBackingStoreStateID;
sendUpdateBackingStoreState(respondImmediatelyOrNot);
}
void DrawingAreaProxyImpl::sendUpdateBackingStoreState(RespondImmediatelyOrNot respondImmediatelyOrNot)
{
ASSERT(m_currentBackingStoreStateID < m_nextBackingStoreStateID);
if (!m_webPageProxy.isValid())
return;
if (m_isWaitingForDidUpdateBackingStoreState)
return;
if (m_webPageProxy.viewSize().isEmpty() && !m_webPageProxy.useFixedLayout())
return;
m_isWaitingForDidUpdateBackingStoreState = respondImmediatelyOrNot == RespondImmediately;
m_webPageProxy.process().send(Messages::DrawingArea::UpdateBackingStoreState(m_nextBackingStoreStateID, respondImmediatelyOrNot == RespondImmediately, m_webPageProxy.deviceScaleFactor(), m_size, m_scrollOffset), m_webPageProxy.pageID());
m_scrollOffset = IntSize();
if (m_isWaitingForDidUpdateBackingStoreState) {
m_webPageProxy.process().responsivenessTimer()->start();
}
if (m_isWaitingForDidUpdateBackingStoreState && !m_layerTreeContext.isEmpty()) {
waitForAndDispatchDidUpdateBackingStoreState();
}
}
void DrawingAreaProxyImpl::waitForAndDispatchDidUpdateBackingStoreState()
{
ASSERT(m_isWaitingForDidUpdateBackingStoreState);
if (!m_webPageProxy.isValid())
return;
if (m_webPageProxy.process().state() == WebProcessProxy::State::Launching)
return;
m_webPageProxy.process().connection()->waitForAndDispatchImmediately<Messages::DrawingAreaProxy::DidUpdateBackingStoreState>(m_webPageProxy.pageID(), std::chrono::milliseconds(500));
}
void DrawingAreaProxyImpl::enterAcceleratedCompositingMode(const LayerTreeContext& layerTreeContext)
{
ASSERT(!isInAcceleratedCompositingMode());
m_backingStore = nullptr;
m_layerTreeContext = layerTreeContext;
m_webPageProxy.enterAcceleratedCompositingMode(layerTreeContext);
}
#if USE(TEXTURE_MAPPER_GL) && PLATFORM(GTK)
void DrawingAreaProxyImpl::setNativeSurfaceHandleForCompositing(uint64_t handle)
{
m_webPageProxy.process().send(Messages::DrawingArea::SetNativeSurfaceHandleForCompositing(handle), m_webPageProxy.pageID());
}
#endif
void DrawingAreaProxyImpl::exitAcceleratedCompositingMode()
{
ASSERT(isInAcceleratedCompositingMode());
m_layerTreeContext = LayerTreeContext();
m_webPageProxy.exitAcceleratedCompositingMode();
}
void DrawingAreaProxyImpl::updateAcceleratedCompositingMode(const LayerTreeContext& layerTreeContext)
{
ASSERT(isInAcceleratedCompositingMode());
m_layerTreeContext = layerTreeContext;
m_webPageProxy.updateAcceleratedCompositingMode(layerTreeContext);
}
void DrawingAreaProxyImpl::discardBackingStoreSoon()
{
if (!m_isBackingStoreDiscardable || m_discardBackingStoreTimer.isActive())
return;
static const double discardBackingStoreDelay = 2;
m_discardBackingStoreTimer.startOneShot(discardBackingStoreDelay);
}
void DrawingAreaProxyImpl::discardBackingStore()
{
m_backingStore = nullptr;
backingStoreStateDidChange(DoNotRespondImmediately);
}
}