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drisw: do an MSAA resolve when copying the backbuffer
author
Italo Nicola
<italonicola@collabora.com>
Fri, 9 Jul 2021 10:34:02 +0000
(07:34 -0300)
committer
Marge Bot
<emma+marge@anholt.net>
Sat, 11 Dec 2021 17:49:00 +0000
(17:49 +0000)
When calling glXCopySubBuffer, we must resolve the backbuffer before
copying it the frontbuffer.
Fixes piglit's glx/glx-copy-sub-buffer on virgl.
Signed-off-by: Italo Nicola <italonicola@collabora.com>
Reviewed-by: Gert Wollny <gert.wollny@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/11714>
src/gallium/frontends/dri/drisw.c
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diff --git
a/src/gallium/frontends/dri/drisw.c
b/src/gallium/frontends/dri/drisw.c
index
adb486c
..
64c7788
100644
(file)
--- a/
src/gallium/frontends/dri/drisw.c
+++ b/
src/gallium/frontends/dri/drisw.c
@@
-285,6
+285,13
@@
drisw_copy_sub_buffer(__DRIdrawable *dPriv, int x, int y,
ctx->st->flush(ctx->st, ST_FLUSH_FRONT, NULL, NULL, NULL);
+ if (drawable->stvis.samples > 1) {
+ /* Resolve the back buffer. */
+ dri_pipe_blit(ctx->st->pipe,
+ drawable->textures[ST_ATTACHMENT_BACK_LEFT],
+ drawable->msaa_textures[ST_ATTACHMENT_BACK_LEFT]);
+ }
+
u_box_2d(x, dPriv->h - y - h, w, h, &box);
drisw_present_texture(ctx->st->pipe, dPriv, ptex, &box);
}