DumpRenderTree behaves differently to WebKitTestRunner wrt integrated/discrete GPU behavior

[Kimmo Kinnunen]

DumpRenderTree behaves differently to WebKitTestRunner wrt integrated/discrete GPU behaviour.
WebKitTestRunner runs web content in WebProcess, which supports graphics switching.
DumpRenderTree does not support graphics switching.

# This uses integrated gpu
run-webkit-tests --prefer-integrated-gpu webgl/

# This uses discrete gpu
run-webkit-tests --prefer-integrated-gpu -1 webgl/

It would simplify interpretation of the results if both runners would run with same gpu for same input.

[Kimmo Kinnunen]

Created attachment 418122 [details]
Patch

[Alexey Proskuryakov]

Comment on attachment 418122 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=418122&action=review

I didn't know about this key, and this is an excellent thing to consider. Just to confirm, this changes nothing on the bots, correct?

Presumably most Legacy WebKit clients don't have NSSupportsAutomaticGraphicsSwitching in their plists, so we should continue to test WebGL with discrete GPU on bots that have it.

> Tools/ChangeLog:12
> +        * DumpRenderTree/Info.plist: Added.

This file should be in DumpRenderTree/mac.

> Tools/DumpRenderTree/DumpRenderTree.xcodeproj/project.pbxproj:1416
>  			baseConfigurationReference = BCB281F00CFA713D007E533E /* DumpRenderTree.xcconfig */;
>  			buildSettings = {
> +				CREATE_INFOPLIST_SECTION_IN_BINARY = YES;
> +				INFOPLIST_FILE = "$(SRCROOT)/Info.plist";

Even though iOS has this in .xcodeproj, adding configurations to xcodeproj makes me cringe. Normally, everything should be in .xcconfig.

[Kimmo Kinnunen]

Created attachment 418263 [details]
Patch

[Kimmo Kinnunen]

Created attachment 418264 [details]
Patch

[Kimmo Kinnunen]

(In reply to Alexey Proskuryakov from comment #2)
> I didn't know about this key, and this is an excellent thing to consider.
> Just to confirm, this changes nothing on the bots, correct?

Correct. As far as I understand, --prefer-integrated-gpu is not used on bots.
The intended behavior change is only for --prefer-integrated-gpu

> Even though iOS has this in .xcodeproj, adding configurations to xcodeproj
> makes me cringe. Normally, everything should be in .xcconfig.

Done, as far as I understand.

[EWS]

Committed r271792: <https://trac.webkit.org/changeset/271792>

All reviewed patches have been landed. Closing bug and clearing flags on attachment 418264 [details].

[Radar WebKit Bug Importer]

<rdar://problem/73567106>