path: root/src/mesa/drivers/dri/common
diff options
authorEric Anholt <>2004-10-07 23:30:29 +0000
committerEric Anholt <>2004-10-07 23:30:29 +0000
commitd09209f5530e8bba78e4e0ec62b2027c588cc8f3 (patch)
tree0c7bdde2064bcf0c880e8bf259a8ef80dbc933a0 /src/mesa/drivers/dri/common
parent554e5a2eaf4b681b5c43b6aeb66f100a66da4a42 (diff)
Add Roland Scheidegger's S3TC patch. This patch does not implement the
(patented) S3TC/DXTC algorithms, but adds an option to dlopen a library module providing functions to do so. Because it uses dlopen, it is only enabled if USE_EXTERNAL_DXTN_LIB=1 is defined (which is only in linux-dri config, so far). It adds support for S3TC to several DRI drivers, and adds a DRI config option to force enabling S3TC even if the software compression/decompression is unavailable. This may allow people to use apps that require S3TC even though they don't have a license to implement the patented material themselves, if those apps use precompressed textures. Ideally we would get permission from the current holder of the patents to implement the algorithm in Mesa, at which point the dlopen mess could go away. Until then, this allows some to run applications they couldn't otherwise, and hopefully will provide us with more push to get the final step of getting that permission done.
Diffstat (limited to 'src/mesa/drivers/dri/common')
1 files changed, 6 insertions, 0 deletions
diff --git a/src/mesa/drivers/dri/common/xmlpool.h b/src/mesa/drivers/dri/common/xmlpool.h
index 7b8222e0a2..efd13a136a 100644
--- a/src/mesa/drivers/dri/common/xmlpool.h
+++ b/src/mesa/drivers/dri/common/xmlpool.h
@@ -159,6 +159,12 @@ DRI_CONF_OPT_BEGIN(no_neg_lod_bias,bool,def) \
DRI_CONF_DESC(de,"Verbiete negativen Textur-LOD-Bias") \
+#define DRI_CONF_FORCE_S3TC_ENABLE(def) \
+DRI_CONF_OPT_BEGIN(force_s3tc_enable,bool,def) \
+ DRI_CONF_DESC(en,"enable s3tc even if software support is not available") \
+ DRI_CONF_DESC(de,"Benutze s3tc auch ohne Softwareunterstuetzung") \