Source/WebKit/WebProcess/WebPage/DrawingArea.messages.in

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messages -> DrawingArea NotRefCounted {
#if USE(COORDINATED_GRAPHICS) || USE(TEXTURE_MAPPER)
    UpdateBackingStoreState(uint64_t backingStoreStateID, bool respondImmediately, float deviceScaleFactor, WebCore::IntSize size, WebCore::IntSize scrollOffset)
#endif

    DidUpdate()

#if PLATFORM(COCOA)
    // Used by TiledCoreAnimationDrawingArea.
    UpdateGeometry(WebCore::IntSize viewSize, bool flushSynchronously, MachSendRight fencePort)
    SetDeviceScaleFactor(float deviceScaleFactor)
    SetColorSpace(struct std::optional<WebCore::DestinationColorSpace> colorSpace)
    SetViewExposedRect(std::optional<WebCore::FloatRect> viewExposedRect)

    AcceleratedAnimationDidStart(uint64_t layerID, String key, MonotonicTime startTime)
    AcceleratedAnimationDidEnd(uint64_t layerID, String key)
    
    AddTransactionCallbackID(WebKit::CallbackID callbackID)
#endif

#if USE(GRAPHICS_LAYER_WC)
    UpdateGeometry(uint64_t backingStoreStateID, WebCore::IntSize viewSize)
#endif

#if PLATFORM(COCOA) || PLATFORM(GTK)
    AdjustTransientZoom(double scale, WebCore::FloatPoint origin)
    CommitTransientZoom(double scale, WebCore::FloatPoint origin)
#endif
}