AlexIndustrial/mesa
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

virgl: Fake MSAA when max samples is 1

Browse Source 
When the host is running on softpipe/llvmpipe the maximum number of
samples for multisampling is 1. GL 3.0 requires at least 4 samples, and
softpipe/llvmpipe get around this by enabling PIPE_CAP_FAKE_SW_MSAA.

This patch mimics softpipe/llvmpipe behavior in virgl by enabling the
same PIPE_CAP_FAKE_SW_MSAA workaround when the max sample count reported
by the host is 1. This change allows virgl on a softpipe/llvmpipe host
to advertise support for GL 3.0 and beyond.

Signed-off-by: Alexandros Frantzis <alexandros.frantzis@collabora.com>
Reviewed-By: Gert Wollny <gert.wollny@collabora.com>
This commit is contained in:
Alexandros Frantzis
2019-03-18 16:30:29 +02:00
parent d6a07732c9
commit 3bccf70211
1 changed files with 4 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/gallium/drivers/virgl/virgl_screen.c
+4 -1
View File
@@ -265,9 +265,12 @@ virgl_get_param(struct pipe_screen *screen, enum pipe_cap param)
if (vscreen->caps.caps.v1.glsl_level < 150)
return vscreen->caps.caps.v2.max_vertex_attribs;
return 32;
case PIPE_CAP_FAKE_SW_MSAA:
/* If the host supports only one sample (e.g., if it is using softpipe),
* fake multisampling to able to advertise higher GL versions. */
return (vscreen->caps.caps.v1.max_samples == 1) ? 1 : 0;
case PIPE_CAP_TEXTURE_GATHER_SM5:
case PIPE_CAP_BUFFER_MAP_PERSISTENT_COHERENT:
case PIPE_CAP_FAKE_SW_MSAA:
case PIPE_CAP_TEXTURE_GATHER_OFFSETS:
case PIPE_CAP_TGSI_VS_WINDOW_SPACE_POSITION:
case PIPE_CAP_MULTI_DRAW_INDIRECT: