[Webkit-unassigned] [Bug 81340] New: Setting WebGL canvas width/height does not reset context state

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=81340

           Summary: Setting WebGL canvas width/height does not reset
                    context state
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebGL
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: skyostil at google.com


>From http://www.whatwg.org/specs/web-apps/current-work/multipage/the-canvas-element.html:

"When the canvas element is created, and subsequently whenever the width and height attributes are set (whether to a new value or to the previous value), the bitmap and any associated contexts must be cleared back to their initial state and reinitialized with the newly specified coordinate space dimensions."

Currently this is only done for 2D contexts and not for WebGL. Also, the fast path for clearing the canvas when its size remains constant (https://bugs.webkit.org/show_bug.cgi?id=80871) is not applied to WebGL.

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