[Webkit-unassigned] [Bug 217558] New: [GPU Process] Introduce RemoteResourceCache to manage the remote resources in Web Process

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=217558

            Bug ID: 217558
           Summary: [GPU Process] Introduce RemoteResourceCache to manage
                    the remote resources in Web Process
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: sabouhallawa at apple.com
                CC: bfulgham at webkit.org, simon.fraser at apple.com,
                    zalan at apple.com

RemoteRenderingBackend will own an instance of RemoteResourceCache. One type of these resources will be the RemoteImageBuffer. We can split the responsibilities of the remote rendering in Web Process among these classes like this:

-- RemoteRenderingBackend: is responsible for sending messages to and receiving messages from the RemoteRenderingBackendProxy. It will delegate all the resource management to its RemoteResourceCache.
-- RemoteResourceCache: is responsible for managing the remote resources including the actual life cycle of these resources and syncing with the GPU Process RemoteResourceCacheProxy.
-- RemoteImageBuffer: is responsible for the ImageBuffer functionalities taking into consideration it is a remote resource, i.e drawing is recorded in WebProcess and backend lives in the GPU Process.

RemoteResourceCache has ensure the remote resources in GPU Process are available till all the clients which are referencing these remote resources are replayed back.

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