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

i965/Gen7: Allow CMS layout for multisample textures 

Now that all the pieces are in place, this should provide
a nice performance boost for apps using multisample textures.

Signed-off-by: Chris Forbes <chrisf@ijw.co.nz>
Reviewed-by: Paul Berry <stereotype441@gmail.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
This commit is contained in:
Chris Forbes 2013-11-30 10:03:10 +13:00
parent 3122c2421a
commit 83b83fb984
1 changed files with 1 additions and 17 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

18
src/mesa/drivers/dri/i965/intel_mipmap_tree.c
View File

@ -99,23 +99,7 @@ compute_msaa_layout(struct brw_context *brw, gl_format format, GLenum target)
assert(brw->gen == 7);
return INTEL_MSAA_LAYOUT_UMS;
} else {
/* For now, if we're going to be texturing from this surface,
* force UMS, so that the shader doesn't have to do different things
* based on whether there's a multisample control surface needing sampled first.
* We can't just blindly read the MCS surface in all cases because:
*
* From the Ivy Bridge PRM, Vol4 Part1 p77 ("MCS Enable"):
*
* If this field is disabled and the sampling engine <ld_mcs> message
* is issued on this surface, the MCS surface may be accessed. Software
* must ensure that the surface is defined to avoid GTT errors.
*/
if (target == GL_TEXTURE_2D_MULTISAMPLE ||
target == GL_TEXTURE_2D_MULTISAMPLE_ARRAY) {
return INTEL_MSAA_LAYOUT_UMS;
} else {
return INTEL_MSAA_LAYOUT_CMS;
}
return INTEL_MSAA_LAYOUT_CMS;
}
}
}