Add support for the "crunch" texture compression tool.

[xonotic/xonotic.git] / misc / tools / cached-converter.sh

diff --git a/misc/tools/cached-converter.sh b/misc/tools/cached-converter.sh
index 9fbdf240eb3594fbd3b243fa9a1edf93606bdbdf..ec976351921dcd0329a86710e2ea5a8f379a1f80 100755 (executable)
--- a/misc/tools/cached-converter.sh
+++ b/misc/tools/cached-converter.sh
@@ -396,25 +396,31 @@ for F in "$@"; do
                        ;;
        esac
 
-       # configure S2TC
+       # Specific hacks for normalmaps.
        case "$f" in
                ./maps/*/lm_[0-9][0-9][0-9][13579]) # deluxemap
                        export S2TC_COLORDIST_MODE=NORMALMAP
                        export S2TC_RANDOM_COLORS=256
                        export S2TC_REFINE_COLORS=LOOP
                        export S2TC_DITHER_MODE=NONE
+                       # Engine ignores alpha channel on these, so we can use the DXT1 black encoding.
+                       export CRUNCH_TEXTYPEFLAGS='-gamma 1.0 -renormalize -rtopmip -uniformMetrics -usetransparentindicesforblack'
                        ;;
                *_norm)
                        export S2TC_COLORDIST_MODE=NORMALMAP
                        export S2TC_RANDOM_COLORS=256
                        export S2TC_REFINE_COLORS=LOOP
                        export S2TC_DITHER_MODE=NONE
+                       # Alpha channel here means height.
+                       export CRUNCH_TEXTYPEFLAGS='-gamma 1.0 -renormalize -rtopmip -uniformMetrics'
                        ;;
                *)
                        export S2TC_COLORDIST_MODE=SRGB_MIXED
                        export S2TC_RANDOM_COLORS=64
                        export S2TC_REFINE_COLORS=LOOP
                        export S2TC_DITHER_MODE=FLOYDSTEINBERG
+                       # Color channel-like images - consider as sRGB.
+                       export CRUNCH_TEXTYPEFLAGS='-gamma 2.2'
                        ;;
        esac