1258417 - Unable to grow window past a 512px threshold when HWA is disabled on Mac OS X

Status: RESOLVED DUPLICATE of bug 1256576

(Core :: Graphics, defect)

Description

[Jonathan Kew [:jfkthame]]

Attachment: screenshot of window that was small when originally opened, after growing past the 512px-width barrier

STR, on Mac OS X 10.9.5 with current Nightly:

* Disable hardware acceleration in Preferences / Advanced, and restart the browser.

* Make the browser window quite small -- say, less than 500px wide.

* Hit Cmd-N to create a new window, which will inherit the same small size.

* Grab the bottom-right corner of the new window and grow it.

Expect:
The window can be freely stretched to cover as much of the screen as you like, and its contents will re-layout and paint as needed.

Result:
The window content stops drawing when the width reaches 512px.

If the window was over 512px wide when originally opened, it will be fine until it is stretched beyond 1024px, and so on...

It looks like we must be allocating something (texture? tile? layer? ...?) with a specific size when the window is created, and failing to resize as needed when the window grows past these allocation-unit boundaries.