[Bug 9714] New: Canvas element stops functioning at large widths


           Summary: Canvas element stops functioning at large widths
           Product: HTML WG
           Version: unspecified
          Platform: PC
        OS/Version: Windows NT
            Status: NEW
          Severity: normal
          Priority: P2
         Component: HTML Canvas 2D Context (editor: Ian Hickson)
        AssignedTo: ian@hixie.ch
        ReportedBy: troy.brophy@gmail.com
         QAContact: public-html-bugzilla@w3.org
                CC: mike@w3.org, public-html@w3.org

I have created a functional canvas element at widths up to 22,000 pixels, with
a 2d object drawn at 20,000 pixels (horizontal position).

But as I try to increase the width of the canvas element beyond that width, the
2d object no longer appears.

Code sample:

<canvas id="mycanvas" style="position: absolute;" width="4000600"
height="600">your browser does not support the canvas tag</canvas>

<script type="text/javascript">
    var canvas=document.getElementById('mycanvas');
    var ctx=canvas.getContext('2d');


Expected to see the 300X300px red square just to the left of the page's right
edge (600 pixels to the left), but nothing appears. 

I'm new to this element, so I may be missing something, but this code works
fine if the width of the CANVAS element is reduced, and the fillRect horizontal
position is also reduced, both under 30,000 pixels.

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Received on Wednesday, 12 May 2010 09:27:54 UTC