ContentfulPaintChecker.cpp [plain text]
#include "config.h"
#include "ContentfulPaintChecker.h"
#include "FrameView.h"
#include "GraphicsContext.h"
#include "RenderView.h"
namespace WebCore {
bool ContentfulPaintChecker::qualifiesForContentfulPaint(FrameView& frameView)
{
ASSERT(!frameView.needsLayout());
ASSERT(frameView.renderView());
auto oldPaintBehavior = frameView.paintBehavior();
auto oldEntireContents = frameView.paintsEntireContents();
frameView.setPaintBehavior(PaintBehavior::FlattenCompositingLayers);
frameView.setPaintsEntireContents(true);
GraphicsContext checkerContext(GraphicsContext::PaintInvalidationReasons::DetectingContentfulPaint);
frameView.paint(checkerContext, frameView.renderView()->documentRect());
frameView.setPaintsEntireContents(oldEntireContents);
frameView.setPaintBehavior(oldPaintBehavior);
return checkerContext.contenfulPaintDetected();
}
}