texSubImage2D optimisation for cube maps

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Rik Cabanier

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Jun 27, 2022, 2:00:50 PMJun 27
to Graphics-dev
All,

I'm seeing some strange behavior where 6 calls to `texSubImage2D` with an image for each cubemap side are coalesced into a single `texSubImage2D` call.
Does anyone know where in the chromium stack this is happening?

This code is not executing correctly in our product and I'm trying to investigate why.

Zhenyao Mo

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Jun 27, 2022, 8:22:17 PMJun 27
to Rik Cabanier, Graphics-dev
AFAIK: there is no GL API to upload images to all six cubemap sides in
one GL call. So I don't think such optimization exists in Chrome.

Why do you think this is what happens in Chrome?

Rik Cabanier

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Jun 28, 2022, 1:41:53 AMJun 28
to Zhenyao Mo, Graphics-dev
I put a debug statement in GLES2Implementation::TexSubImage2D and it is called only once with a texture that includes all sides.

Rik Cabanier

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Jun 28, 2022, 4:16:54 AMJun 28
to Zhenyao Mo, Graphics-dev
Never mind! I was looking at the wrong code :-)
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