[Webkit-unassigned] [Bug 87797] New: [Cairo] [TextureMapperGL] Nvidia card does not update WebGL texture when interacting with canvas

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=87797

           Summary: [Cairo] [TextureMapperGL] Nvidia card does not update
                    WebGL texture when interacting with canvas
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
               URL: http://www.ibiblio.org/e-notes/webgl/deflate/ship.html
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Platform
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: mrobinson at webkit.org


When interacting with http://www.ibiblio.org/e-notes/webgl/deflate/ship.html with TextureMapperGL enabled, the canvas content does not update after the first render. It seems that Nvidia cards require manually rebinding to the multisampling FBO after multisample resolution. This is likely because the texture cannot be active on two framebuffers at once. This does not seem to be an issue for my Intel driver.

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