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31 #ifndef ResourceLoadPriorityOptimizer_h
32 #define ResourceLoadPriorityOptimizer_h
34 #include "core/fetch/ImageResource.h"
35 #include "core/fetch/ResourcePtr.h"
36 #include "platform/geometry/LayoutRect.h"
38 #include "wtf/HashMap.h"
39 #include "wtf/HashSet.h"
40 #include "wtf/OwnPtr.h"
44 class ResourceLoadPriorityOptimizer {
46 enum VisibilityStatus {
50 void notifyImageResourceVisibility(ImageResource*, VisibilityStatus, const LayoutRect&);
51 void updateAllImageResourcePriorities();
52 void addRenderObject(RenderObject*);
53 void removeRenderObject(RenderObject*);
55 static ResourceLoadPriorityOptimizer* resourceLoadPriorityOptimizer();
58 ResourceLoadPriorityOptimizer();
59 ~ResourceLoadPriorityOptimizer();
61 void updateImageResourcesWithLoadPriority();
63 struct ResourceAndVisibility {
64 ResourceAndVisibility(ImageResource*, VisibilityStatus, uint32_t);
65 ~ResourceAndVisibility();
66 ResourcePtr<ImageResource> imageResource;
67 VisibilityStatus status;
71 typedef HashMap<unsigned long, OwnPtr<ResourceAndVisibility>, WTF::IntHash<unsigned>, WTF::UnsignedWithZeroKeyHashTraits<unsigned>> ImageResourceMap;
72 ImageResourceMap m_imageResources;
74 typedef HashSet<RenderObject*> RenderObjectSet;
75 RenderObjectSet m_objects;