andreacavalli/xserver-multidpi
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

glamor: Use GL_STREAM_READ also for read/write access to a PBO

Browse Source 
Otherwise the CPU may end up reading from non-cacheable memory, which is
very slow.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=84178
Signed-off-by: Michel Dänzer <michel.daenzer@amd.com>
Reviewed-by: Markus Wick <markus@selfnet.de>
Reviewed-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Keith Packard <keithp@keithp.com>
This commit is contained in:
Michel Dänzer 2014-09-25 15:27:22 +09:00 committed by Keith Packard
parent 78c27d12e1
commit d3d845ca9e
1 changed files with 1 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
glamor/glamor_prepare.c
View File

@ -84,10 +84,7 @@ glamor_prep_pixmap_box(PixmapPtr pixmap, glamor_access_t access, BoxPtr box)
if (priv->base.pbo == 0)
glGenBuffers(1, &priv->base.pbo);
if (access == GLAMOR_ACCESS_RW)
gl_usage = GL_DYNAMIC_DRAW;
else
gl_usage = GL_STREAM_READ;
gl_usage = GL_STREAM_READ;
glBindBuffer(GL_PIXEL_PACK_BUFFER, priv->base.pbo);
glBufferData(GL_PIXEL_PACK_BUFFER,