GLES2 disable half-float project setting #38453
Merged
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It seems that particles (and some other features) do not work correctly on iOS in GLES2 because either many of the devices do not support half float compression, or the GL constant used to reference it from Godot is incorrect.
This PR adds a project setting in rendering/gles2/ to disable half-float compression on iOS.
See #38441
May fix - #38318, #38211, #32837, #27191, #31907
Notes
Also, I'm not sure the whole approach (also currently used in web) of compressing to half float in the visual server then decompressing in the renderer is a good idea. It would be better to set some flags or something in the visual server to disable compression happening at all. But maybe it only happens as a once off during mesh creation, not sure yet, in which case it isn't so bad.