[webkit-dev] Canvas Layout Behaviour after Device Orientation Change

[Pierre-Antoine LaFayette]

I'm looking at a layout issue on mobile and would like someone to help
clarify what behaviour would be expected. Below I will describe this issue:

The web page is composed of a 1024x1024 canvas with style="width:100%;
height: 100%", does not specify viewport meta tag, rather just uses the
platform default (980 in my case).

Device loads the page in landscape mode, the canvas takes up the entire
viewport, and is zoomed out completely (can see the full canvas).

<<Rotate the device to portrait mode>>

What would be the expected layout? Should the canvas be zoomed out to fit
the width of the device in portrait mode? Should the canvas width be
preserved and the canvas be clipped at the device width boundary allowing
to scroll to see the rest of the canvas?

<<Rotate the device to landscape mode>>

I imagine the layout should now be the same as when loaded initially.


Any thoughts or opinions on what the correct layout behaviour should be
here would be much appreciated. I'm not sure if there is a formal
specification for this or if it left as an exercise for the vendor.

Thanks,
Pierre
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