#include "config.h"
#include "LayerTreeHost.h"
#if USE(COORDINATED_GRAPHICS)
#include "DrawingArea.h"
#include "WebPage.h"
#include "WebPageProxyMessages.h"
#include <WebCore/Chrome.h>
#include <WebCore/Frame.h>
#include <WebCore/FrameView.h>
#include <WebCore/PageOverlayController.h>
#if USE(GLIB_EVENT_LOOP)
#include <wtf/glib/RunLoopSourcePriority.h>
#endif
namespace WebKit {
using namespace WebCore;
LayerTreeHost::LayerTreeHost(WebPage& webPage)
: m_webPage(webPage)
, m_compositorClient(*this)
, m_surface(AcceleratedSurface::create(webPage, *this))
, m_viewportController(webPage.size())
, m_layerFlushTimer(RunLoop::main(), this, &LayerTreeHost::layerFlushTimerFired)
, m_coordinator(webPage, *this)
, m_displayID(std::numeric_limits<uint32_t>::max() - m_webPage.identifier().toUInt64())
{
#if USE(GLIB_EVENT_LOOP)
m_layerFlushTimer.setPriority(RunLoopSourcePriority::LayerFlushTimer);
m_layerFlushTimer.setName("[WebKit] LayerTreeHost");
#endif
scheduleLayerFlush();
if (FrameView* frameView = m_webPage.mainFrameView()) {
auto contentsSize = frameView->contentsSize();
if (!contentsSize.isEmpty())
m_viewportController.didChangeContentsSize(contentsSize);
}
IntSize scaledSize(m_webPage.size());
scaledSize.scale(m_webPage.deviceScaleFactor());
float scaleFactor = m_webPage.deviceScaleFactor() * m_viewportController.pageScaleFactor();
TextureMapper::PaintFlags paintFlags = 0;
if (m_surface->shouldPaintMirrored())
paintFlags |= TextureMapper::PaintingMirrored;
m_compositor = ThreadedCompositor::create(m_compositorClient, m_compositorClient, m_displayID, scaledSize, scaleFactor, paintFlags);
m_layerTreeContext.contextID = m_surface->surfaceID();
didChangeViewport();
}
LayerTreeHost::~LayerTreeHost()
{
cancelPendingLayerFlush();
m_coordinator.invalidate();
m_compositor->invalidate();
m_surface = nullptr;
}
void LayerTreeHost::setLayerFlushSchedulingEnabled(bool layerFlushingEnabled)
{
if (m_layerFlushSchedulingEnabled == layerFlushingEnabled)
return;
m_layerFlushSchedulingEnabled = layerFlushingEnabled;
if (m_layerFlushSchedulingEnabled) {
m_compositor->resume();
scheduleLayerFlush();
return;
}
cancelPendingLayerFlush();
m_compositor->suspend();
}
void LayerTreeHost::setShouldNotifyAfterNextScheduledLayerFlush(bool notifyAfterScheduledLayerFlush)
{
m_notifyAfterScheduledLayerFlush = notifyAfterScheduledLayerFlush;
}
void LayerTreeHost::scheduleLayerFlush()
{
if (!m_layerFlushSchedulingEnabled)
return;
if (m_isWaitingForRenderer) {
m_scheduledWhileWaitingForRenderer = true;
return;
}
if (!m_layerFlushTimer.isActive())
m_layerFlushTimer.startOneShot(0_s);
}
void LayerTreeHost::cancelPendingLayerFlush()
{
m_layerFlushTimer.stop();
}
void LayerTreeHost::layerFlushTimerFired()
{
if (m_isSuspended || m_isWaitingForRenderer)
return;
if (!m_coordinator.rootCompositingLayer())
return;
if (m_forceRepaintAsync.callbackID)
m_coordinator.forceFrameSync();
bool didSync = m_coordinator.flushPendingLayerChanges();
if (m_notifyAfterScheduledLayerFlush && didSync) {
m_webPage.drawingArea()->layerHostDidFlushLayers();
m_notifyAfterScheduledLayerFlush = false;
}
}
void LayerTreeHost::setRootCompositingLayer(GraphicsLayer* graphicsLayer)
{
m_coordinator.setRootCompositingLayer(graphicsLayer);
}
void LayerTreeHost::setViewOverlayRootLayer(GraphicsLayer* viewOverlayRootLayer)
{
m_viewOverlayRootLayer = viewOverlayRootLayer;
m_coordinator.setViewOverlayRootLayer(viewOverlayRootLayer);
}
void LayerTreeHost::scrollNonCompositedContents(const IntRect& rect)
{
auto* frameView = m_webPage.mainFrameView();
if (!frameView || !frameView->delegatesScrolling())
return;
m_viewportController.didScroll(rect.location());
if (m_isDiscardable)
m_discardableSyncActions.add(DiscardableSyncActions::UpdateViewport);
else
didChangeViewport();
}
void LayerTreeHost::forceRepaint()
{
m_coordinator.syncDisplayState();
scheduleLayerFlush();
if (!m_isWaitingForRenderer)
m_coordinator.flushPendingLayerChanges();
m_compositor->forceRepaint();
}
bool LayerTreeHost::forceRepaintAsync(CallbackID callbackID)
{
scheduleLayerFlush();
ASSERT(!m_forceRepaintAsync.callbackID);
m_forceRepaintAsync.callbackID = OptionalCallbackID(callbackID);
m_forceRepaintAsync.needsFreshFlush = m_scheduledWhileWaitingForRenderer;
return true;
}
void LayerTreeHost::sizeDidChange(const IntSize& size)
{
if (m_isDiscardable) {
m_discardableSyncActions.add(DiscardableSyncActions::UpdateSize);
m_viewportController.didChangeViewportSize(size);
return;
}
if (m_surface->hostResize(size))
m_layerTreeContext.contextID = m_surface->surfaceID();
m_coordinator.sizeDidChange(size);
scheduleLayerFlush();
m_viewportController.didChangeViewportSize(size);
IntSize scaledSize(size);
scaledSize.scale(m_webPage.deviceScaleFactor());
m_compositor->setViewportSize(scaledSize, m_webPage.deviceScaleFactor() * m_viewportController.pageScaleFactor());
didChangeViewport();
}
void LayerTreeHost::pauseRendering()
{
m_isSuspended = true;
m_compositor->suspend();
}
void LayerTreeHost::resumeRendering()
{
m_isSuspended = false;
m_compositor->resume();
scheduleLayerFlush();
}
GraphicsLayerFactory* LayerTreeHost::graphicsLayerFactory()
{
return &m_coordinator;
}
void LayerTreeHost::contentsSizeChanged(const IntSize& newSize)
{
m_viewportController.didChangeContentsSize(newSize);
if (m_isDiscardable)
m_discardableSyncActions.add(DiscardableSyncActions::UpdateViewport);
else
didChangeViewport();
}
void LayerTreeHost::didChangeViewportAttributes(ViewportAttributes&& attr)
{
m_viewportController.didChangeViewportAttributes(WTFMove(attr));
if (m_isDiscardable)
m_discardableSyncActions.add(DiscardableSyncActions::UpdateViewport);
else
didChangeViewport();
}
void LayerTreeHost::didChangeViewport()
{
FloatRect visibleRect(m_viewportController.visibleContentsRect());
if (visibleRect.isEmpty())
return;
FrameView* view = m_webPage.corePage()->mainFrame().view();
Scrollbar* scrollbar = view->verticalScrollbar();
if (scrollbar && !scrollbar->isOverlayScrollbar())
visibleRect.expand(scrollbar->width(), 0);
scrollbar = view->horizontalScrollbar();
if (scrollbar && !scrollbar->isOverlayScrollbar())
visibleRect.expand(0, scrollbar->height());
m_coordinator.setVisibleContentsRect(visibleRect);
scheduleLayerFlush();
float pageScale = m_viewportController.pageScaleFactor();
IntPoint scrollPosition = roundedIntPoint(visibleRect.location());
if (m_lastScrollPosition != scrollPosition) {
m_lastScrollPosition = scrollPosition;
m_compositor->setScrollPosition(m_lastScrollPosition, m_webPage.deviceScaleFactor() * pageScale);
if (!view->useFixedLayout())
view->notifyScrollPositionChanged(m_lastScrollPosition);
}
if (m_lastPageScaleFactor != pageScale) {
m_lastPageScaleFactor = pageScale;
m_webPage.scalePage(pageScale, m_lastScrollPosition);
}
}
void LayerTreeHost::setIsDiscardable(bool discardable)
{
m_isDiscardable = discardable;
if (m_isDiscardable) {
m_discardableSyncActions = OptionSet<DiscardableSyncActions>();
return;
}
if (m_discardableSyncActions.isEmpty())
return;
if (m_discardableSyncActions.contains(DiscardableSyncActions::UpdateSize)) {
sizeDidChange(m_webPage.size());
return;
}
if (m_discardableSyncActions.contains(DiscardableSyncActions::UpdateScale))
deviceOrPageScaleFactorChanged();
if (m_discardableSyncActions.contains(DiscardableSyncActions::UpdateViewport))
didChangeViewport();
}
void LayerTreeHost::deviceOrPageScaleFactorChanged()
{
if (m_isDiscardable) {
m_discardableSyncActions.add(DiscardableSyncActions::UpdateScale);
return;
}
if (m_surface->hostResize(m_webPage.size()))
m_layerTreeContext.contextID = m_surface->surfaceID();
m_coordinator.deviceOrPageScaleFactorChanged();
m_webPage.corePage()->pageOverlayController().didChangeDeviceScaleFactor();
m_compositor->setScaleFactor(m_webPage.deviceScaleFactor() * m_viewportController.pageScaleFactor());
}
RefPtr<DisplayRefreshMonitor> LayerTreeHost::createDisplayRefreshMonitor(PlatformDisplayID displayID)
{
return m_compositor->displayRefreshMonitor(displayID);
}
void LayerTreeHost::didFlushRootLayer(const FloatRect& visibleContentRect)
{
if (m_viewOverlayRootLayer)
m_viewOverlayRootLayer->flushCompositingState(visibleContentRect);
}
void LayerTreeHost::commitSceneState(const CoordinatedGraphicsState& state)
{
m_isWaitingForRenderer = true;
m_compositor->updateSceneState(state);
}
void LayerTreeHost::updateScene()
{
m_compositor->updateScene();
}
void LayerTreeHost::frameComplete()
{
m_compositor->frameComplete();
}
uint64_t LayerTreeHost::nativeSurfaceHandleForCompositing()
{
m_surface->initialize();
return m_surface->window();
}
void LayerTreeHost::didDestroyGLContext()
{
m_surface->finalize();
}
void LayerTreeHost::willRenderFrame()
{
m_surface->willRenderFrame();
}
void LayerTreeHost::didRenderFrame()
{
m_surface->didRenderFrame();
}
void LayerTreeHost::requestDisplayRefreshMonitorUpdate()
{
m_coordinator.forceFrameSync();
scheduleLayerFlush();
}
void LayerTreeHost::handleDisplayRefreshMonitorUpdate(bool hasBeenRescheduled)
{
renderNextFrame(hasBeenRescheduled);
}
void LayerTreeHost::renderNextFrame(bool forceRepaint)
{
m_isWaitingForRenderer = false;
bool scheduledWhileWaitingForRenderer = std::exchange(m_scheduledWhileWaitingForRenderer, false);
m_coordinator.renderNextFrame();
if (m_forceRepaintAsync.callbackID) {
ASSERT(!m_forceRepaintAsync.needsFreshFlush || scheduledWhileWaitingForRenderer);
if (!m_forceRepaintAsync.needsFreshFlush) {
m_webPage.send(Messages::WebPageProxy::VoidCallback(m_forceRepaintAsync.callbackID.callbackID()));
m_forceRepaintAsync.callbackID = OptionalCallbackID();
}
m_forceRepaintAsync.needsFreshFlush = false;
}
if (scheduledWhileWaitingForRenderer || m_layerFlushTimer.isActive() || forceRepaint) {
m_layerFlushTimer.stop();
if (forceRepaint)
m_coordinator.forceFrameSync();
layerFlushTimerFired();
}
}
}
#endif // USE(COORDINATED_GRAPHICS)