[Webkit-unassigned] [Bug 103046] New: [TexMap] Remove dependency of TextureMapperLayer on GraphicsLayerTextureMapper.

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=103046

           Summary: [TexMap] Remove dependency of TextureMapperLayer on
                    GraphicsLayerTextureMapper.
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: luxtella at company100.net


It is a preparation patch for Threaded Coordinated Graphics on WK1.

We want to make TextureMapperLayer into an actor model. After making an actor
model, GraphicsLayerTextureMapper and LayerTreeRenderer will communicate with
TextureMapperLayer using message passing. In the first step, we want to hide
GraphicsLayerTextureMapper from TextureMapperLayer.

There are 2 kinds of dependencies of TextureMapperLayer in GraphicsLayerTextureMapper.
1. To query layer states
2. To paint layer contents

In this patch, we removed the second dependency. Currently, TextureMapperLayer
requests painting contents to GraphicsLayerTextureMapper in WK1 while
Coordinated Graphics prepares the contents in LayerTreeRenderer. This patch
makes WK1 prepare the contents in GraphicsLayerTextureMapper like
LayerTreeRenderer.

We will remove the first dependency in a follow-up patch.

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