Enable building with CEF 6261 & 6367 (Chromium 122 & 124)

[WizardCM]

Description

This allows compiling OBS Browser with Chromium 124-based CEF versions.

This also adds basic support for the new, official, shared textures API on both Windows and macOS.

Sources:

• https://github.com/chromiumembedded/cef/blame/d3a483ef59f8f40c624967361e05edda413bbf5b/libcef_dll/ctocpp/browser_ctocpp.h#L57
• https://bitbucket.org/chromiumembedded/cef/commits/f3b570c
• https://bitbucket.org/chromiumembedded/cef/commits/260dd0ca2

Fun note; Remote debugging now requires --remote-allow-origins=* otherwise Remote Debugging immediately disconnects - even for localhost.

Motivation and Context

At some point we'd like to upgrade to modern CEF. To do that, obs-browser needs to compile.

How Has This Been Tested?

Launch OBS with a CEF 6261 or 6367 build. Have not tested downgrading CEF to our currently supported versions.

Only tested on Windows.

Types of changes

• Tweak (non-breaking change to improve existing functionality)

Checklist:

• My code has been run through clang-format.
• I have read the contributing document.
• My code is not on the master branch.
• The code has been tested.
• All commit messages are properly formatted and commits squashed where appropriate.
• I have included updates to all appropriate documentation.

[jmickelonis]

Slightly off-topic, but you might be interested to know.
I built with 6261 (beta) on Ubuntu 23.10. Browser sources and docks do show up, but calls to ExecuteJavascript fail silently without effect. 6167 stable works fine.

[PatTheMav]

@WizardCM do you want to include the texture flip override for builds above 6261 in this PR as well (as discussed off-thread)?

As the texture shared with us is originally created for video encoding, it's pre-flipped already.

[RytoEX]

@WizardCM do you want to include the texture flip override for builds above 6261 in this PR as well (as discussed off-thread)?

As the texture shared with us is originally created for video encoding, it's pre-flipped already.

Gentle ping, @WizardCM ?

[WizardCM]

@RytoEX @PatTheMav Per prior discussion, this PR now makes the necessary adjustments (including flip) to correctly run shared textures with CEF 6367. I have tested it on Windows 10 with the 6367 CEF build only. I've also kept the two commits separate for easier review, and they can realistically be combined for final merge.

[WizardCM]

Alright, commits have been updated. Tested on macOS, and OnScheduleMessagePumpWork changed somewhere between 5563 and 5938, so our code handles that case too. Tested on Linux, and no additional changes were needed on our side (obviously without shared textures).

This now builds and runs on Windows, macOS and Linux without issue, and the first 2 with shared textures. In my opinion this seems good to merge.

For now, I've left the code to set bs->last_handle but it's not read. I'll let others confirm what we want to do there.

[reitowo]

Great work!

I forgot why, but is there a chance to import gbm in Linux? Seems OBS is the easiest user to make this work because it has a handy render pipeline.

[jpietek]

Great work!

I forgot why, but is there a chance to import gbm in Linux? Seems OBS is the easiest user to make this work because it has a handy render pipeline.

I tried once (obs discord long discussion), but failed on Nvidia (OK with Intel and AMD) with some old fork of yours. Would it makes sense to try again with 126 chromium? I see the api has changed not void* but some structure with the handle now.

[RytoEX]

There are still be open feedback threads. They should be resolved before this can be merged.

[RytoEX]

The CEF API changes look good to me. I haven't done a local test build of this yet.

[RytoEX]

I can confirm that I can build OBS Studio on Windows against both CEF 103 (5060) and 126 (6478) with these changes.