[webkit-qt] How to see the debug border and repaint count for Accelerated Compositing.

[Dongsung Huang]

Hi folks!

Before yesterday, only Coordinated Graphics System showed the debug border
and repaint count for a tiled layer.

Now both Coordinated Graphics System and Texture Mapper can show the debug
border and repaint count.
If you run Qt WK1, WK2, EFL WK2, GTK WK1 and WK2, you can see the debug
visuals when setting WEBKIT_SHOW_COMPOSITING_DEBUG_VISUALS environment
value to 1.
like > WEBKIT_SHOW_COMPOSITING_DEBUG_VISUALS=1 ./MiniBrowser

I hope it helps your debugging :)

https://bugs.webkit.org/show_bug.cgi?id=105787 is the related bug.

In addition, if you set setShowDebugBorders() and setShowRepaintCounter()
in Settings, you can see the debug visuals also, without the
strange environment setting.

Cheers!

Dongsung Huang

p.s. I tried to amend
https://trac.webkit.org/wiki/CoordinatedGraphicsSystem, but
it seems like I don't have authority. Could anyone help me?
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