DisplayRefreshMonitorMac.cpp [plain text]
#include "config.h"
#include "DisplayRefreshMonitorMac.h"
#if USE(REQUEST_ANIMATION_FRAME_DISPLAY_MONITOR)
#include <QuartzCore/QuartzCore.h>
#include <wtf/CurrentTime.h>
#include <wtf/RunLoop.h>
namespace WebCore {
DisplayRefreshMonitorMac::DisplayRefreshMonitorMac(PlatformDisplayID displayID)
: DisplayRefreshMonitor(displayID)
, m_weakFactory(this)
, m_displayLink(nullptr)
{
}
DisplayRefreshMonitorMac::~DisplayRefreshMonitorMac()
{
if (m_displayLink) {
CVDisplayLinkStop(m_displayLink);
CVDisplayLinkRelease(m_displayLink);
m_displayLink = nullptr;
}
}
static CVReturn displayLinkCallback(CVDisplayLinkRef, const CVTimeStamp*, const CVTimeStamp*, CVOptionFlags, CVOptionFlags*, void* data)
{
DisplayRefreshMonitorMac* monitor = static_cast<DisplayRefreshMonitorMac*>(data);
monitor->displayLinkFired();
return kCVReturnSuccess;
}
bool DisplayRefreshMonitorMac::requestRefreshCallback()
{
if (!isActive())
return false;
if (!m_displayLink) {
setIsActive(false);
CVReturn error = CVDisplayLinkCreateWithCGDisplay(displayID(), &m_displayLink);
if (error)
return false;
error = CVDisplayLinkSetOutputCallback(m_displayLink, displayLinkCallback, this);
if (error)
return false;
error = CVDisplayLinkStart(m_displayLink);
if (error)
return false;
setIsActive(true);
}
LockHolder lock(mutex());
setIsScheduled(true);
return true;
}
void DisplayRefreshMonitorMac::displayLinkFired()
{
LockHolder lock(mutex());
if (!isPreviousFrameDone())
return;
setIsPreviousFrameDone(false);
RunLoop::main().dispatch([weakPtr = m_weakFactory.createWeakPtr()] {
if (auto* monitor = weakPtr.get())
handleDisplayRefreshedNotificationOnMainThread(monitor);
});
}
}
#endif // USE(REQUEST_ANIMATION_FRAME_DISPLAY_MONITOR)