1 files changed, 12 insertions, 3 deletions
diff --git a/Source/WebKit2/UIProcess/BackingStore.h b/Source/WebKit2/UIProcess/BackingStore.h
index e196a55..a3ea065 100644
--- a/Source/WebKit2/UIProcess/BackingStore.h
+++ b/Source/WebKit2/UIProcess/BackingStore.h
@@ -40,6 +40,7 @@ namespace WebCore {
 
 namespace WebKit {
 
+class ShareableBitmap;
 class UpdateInfo;
 class WebPageProxy;
 
@@ -47,9 +48,11 @@ class BackingStore {
     WTF_MAKE_NONCOPYABLE(BackingStore);
 
 public:
-    static PassOwnPtr<BackingStore> create(const WebCore::IntSize&);
+    static PassOwnPtr<BackingStore> create(const WebCore::IntSize&, WebPageProxy*);
     ~BackingStore();
 
+    const WebCore::IntSize& size() const { return m_size; }
+
 #if PLATFORM(MAC)
     typedef CGContextRef PlatformGraphicsContext;
 #endif
@@ -58,13 +61,19 @@ public:
     void incorporateUpdate(const UpdateInfo&);
 
 private:
-    explicit BackingStore(const WebCore::IntSize&);
+    BackingStore(const WebCore::IntSize&, WebPageProxy*);
 
-    void scroll(const WebCore::IntRect& scrollRect, const WebCore::IntSize& scrollDelta);
+    void incorporateUpdate(ShareableBitmap*, const UpdateInfo&);
+    void scroll(const WebCore::IntRect& scrollRect, const WebCore::IntSize& scrollOffset);
 
     WebCore::IntSize m_size;
+    WebPageProxy* m_webPageProxy;
+    double m_latestUpdateTimestamp;
 
 #if PLATFORM(MAC)
+    CGContextRef backingStoreContext();
+
+    RetainPtr<CGLayerRef> m_cgLayer;
     RetainPtr<CGContextRef> m_bitmapContext;
 #endif
 };