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egl/x11: Allow all RGB visuals to match 32-bit RGBA EGLConfigs

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Drop the limitation to 24 or 30 bit configs. It was an abritrary
compromise to usually give apps what they wanted, but now we are about
to get a clean solution for alpha-blending on X11.

Based on a patch by Freya Gentz <zegentzy@protonmail.com>, see
https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/2376

Signed-off-by: Robert Mader <robert.mader@posteo.de>
Signed-off-by: David Heidelberg <david.heidelberg@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/9989>
This commit is contained in:
Robert Mader 2021-10-16 17:16:46 +02:00 • committed by Marge Bot
parent 9bdab38424
commit 8a02ca1b2e
1 changed files with 1 additions and 5 deletions
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6
src/egl/drivers/dri2/platform_x11.c
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@ -843,8 +843,7 @@ dri2_x11_add_configs_for_visuals(struct dri2_egl_display *dri2_dpy,
continue;
}
/* Allow a 24-bit RGB visual to match a 32-bit RGBA EGLConfig.
* Ditto for 30-bit RGB visuals to match a 32-bit RGBA EGLConfig.
/* Allows RGB visuals to match a 32-bit RGBA EGLConfig.
* Otherwise it will only match a 32-bit RGBA visual. On a
* composited window manager on X11, this will make all of the
* EGLConfigs with destination alpha get blended by the
@ -852,9 +851,6 @@ dri2_x11_add_configs_for_visuals(struct dri2_egl_display *dri2_dpy,
* wants... especially on drivers that only have 32-bit RGBA
* EGLConfigs! */
if (sizes[3] != 0) {
if (d.data->depth != 24 && d.data->depth != 30)
continue;
unsigned int rgba_mask =
~(visuals[i].red_mask | visuals[i].green_mask |
visuals[i].blue_mask);