DisplayListReplayer.cpp [plain text]
#include "config.h"
#include "DisplayListReplayer.h"
#include "DisplayListItems.h"
#include "GraphicsContext.h"
#include "Logging.h"
#include "TextStream.h"
namespace WebCore {
namespace DisplayList {
Replayer::Replayer(GraphicsContext& context, const DisplayList& displayList)
: m_displayList(displayList)
, m_context(context)
{
}
Replayer::~Replayer()
{
}
std::unique_ptr<DisplayList> Replayer::replay(const FloatRect& initialClip, bool trackReplayList)
{
LOG_WITH_STREAM(DisplayLists, stream << "\nReplaying with clip " << initialClip);
UNUSED_PARAM(initialClip);
std::unique_ptr<DisplayList> replayList;
if (UNLIKELY(trackReplayList))
replayList = std::make_unique<DisplayList>();
size_t numItems = m_displayList.itemCount();
for (size_t i = 0; i < numItems; ++i) {
auto& item = m_displayList.list()[i].get();
if (is<DrawingItem>(item)) {
const DrawingItem& drawingItem = downcast<DrawingItem>(item);
if (drawingItem.extentKnown() && !drawingItem.extent().intersects(initialClip)) {
LOG_WITH_STREAM(DisplayLists, stream << "skipping " << i << " " << item);
continue;
}
}
LOG_WITH_STREAM(DisplayLists, stream << "applying " << i << " " << item);
item.apply(m_context);
if (UNLIKELY(trackReplayList))
replayList->appendItem(const_cast<Item&>(item));
}
return replayList;
}
} }