Mesa (master): svga: only support 4x, 8x, 16x msaa

[Brian Paul]

Module: Mesa
Branch: master
Commit: dc62ddfb39e2287f1376df94e15bf108a73f12b0
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=dc62ddfb39e2287f1376df94e15bf108a73f12b0

Author: Brian Paul <brianp at vmware.com>
Date:   Thu Jul 20 14:53:07 2017 -0600

svga: only support 4x, 8x, 16x msaa

Skip 2x MSAA, for example, since it's seldom used and just bloats
the list of pixel formats.

Reviewed-by: Charmaine Lee <charmainel at vmware.com>

---

 src/gallium/drivers/svga/svga_screen.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/gallium/drivers/svga/svga_screen.c b/src/gallium/drivers/svga/svga_screen.c
index 1ec91e57d3..77223c9c91 100644
--- a/src/gallium/drivers/svga/svga_screen.c
+++ b/src/gallium/drivers/svga/svga_screen.c
@@ -1116,6 +1116,11 @@ svga_screen_create(struct svga_winsys_screen *sws)
             get_uint_cap(sws, SVGA3D_DEVCAP_MULTISAMPLE_MASKABLESAMPLES, 0);
       }
 
+      /* We only support 4x, 8x, 16x MSAA */
+      svgascreen->ms_samples &= ((1 << (4-1)) |
+                                 (1 << (8-1)) |
+                                 (1 << (16-1)));
+
       /* Maximum number of constant buffers */
       svgascreen->max_const_buffers =
          get_uint_cap(sws, SVGA3D_DEVCAP_DX_MAX_CONSTANT_BUFFERS, 1);