ImageQualityController.h [plain text]
#ifndef ImageQualityController_h
#define ImageQualityController_h
#include "GraphicsTypes.h"
#include "Timer.h"
#include <wtf/HashMap.h>
#include <wtf/Optional.h>
namespace WebCore {
class GraphicsContext;
class Image;
class LayoutSize;
class RenderBoxModelObject;
class RenderView;
class RenderStyle;
class ImageQualityController {
WTF_MAKE_NONCOPYABLE(ImageQualityController); WTF_MAKE_FAST_ALLOCATED;
public:
explicit ImageQualityController(const RenderView&);
static Optional<InterpolationQuality> interpolationQualityFromStyle(const RenderStyle&);
InterpolationQuality chooseInterpolationQuality(GraphicsContext&, RenderBoxModelObject*, Image&, const void* layer, const LayoutSize&);
void rendererWillBeDestroyed(RenderBoxModelObject& renderer) { removeObject(&renderer); }
private:
typedef HashMap<const void*, LayoutSize> LayerSizeMap;
typedef HashMap<RenderBoxModelObject*, LayerSizeMap> ObjectLayerSizeMap;
void removeLayer(RenderBoxModelObject*, LayerSizeMap* innerMap, const void* layer);
void set(RenderBoxModelObject*, LayerSizeMap* innerMap, const void* layer, const LayoutSize&);
void highQualityRepaintTimerFired();
void restartTimer();
void removeObject(RenderBoxModelObject*);
const RenderView& m_renderView;
ObjectLayerSizeMap m_objectLayerSizeMap;
Timer m_timer;
bool m_animatedResizeIsActive { false };
bool m_liveResizeOptimizationIsActive { false };
};
}
#endif