support s2tc for texture compression

[xonotic/xonotic.git] / misc / tools / compress-texture

diff --git a/misc/tools/compress-texture b/misc/tools/compress-texture
index 7b998fb7499ec606ea3255893216540a3ef72373..5141b92d04a0da6ec0f1aff748190114e48a12ad 100755 (executable)
--- a/misc/tools/compress-texture
+++ b/misc/tools/compress-texture
@@ -10,8 +10,46 @@ format=$1; shift
 src=$1; shift
 dst=$1; shift
 
+ext=${src##*.}
+
 c=
 f=
+
+fourcchack=
+case "$tool" in
+       compressonator-dxtc)
+               # we still have to preprocess the image to premultiply alpha, as it seems
+               case "$format" in
+                       dxt2)
+                               fourcchack=DXT2
+                               format=dxt2
+                               ;;
+                       dxt4)
+                               fourcchack=DXT4
+                               format=dxt4
+                               ;;
+               esac
+               ;;
+       *)
+               case "$format" in
+                       dxt2)
+                               fourcchack=DXT2
+                               format=dxt3
+                               ;;
+                       dxt4)
+                               fourcchack=DXT4
+                               format=dxt5
+                               ;;
+               esac
+               ;;
+esac
+
+if [ -n "$fourcchack" ]; then
+       fourcchack_dir=`mktemp -d`
+       convert "$src" -fx "u*u.a" "$fourcchack_dir/src.$ext"
+       src="$fourcchack_dir/src.$ext"
+fi
+
 case "$tool" in
        compressonator-dxtc|compressonator-atic)
                case "$tool" in
@@ -20,17 +58,18 @@ case "$tool" in
                esac
                case "$format" in
                        dxt1) f="+fourCC DXT1" ;;
+                       dxt2) f="+fourCC DXT2" ;;
                        dxt3) f="+fourCC DXT3" ;;
+                       dxt4) f="+fourCC DXT4" ;;
                        dxt5) f="+fourCC DXT5" ;;
                esac
                dir=`mktemp -d "$HOME/.wine/drive_c/compressonator.XXXXXX"`
                dir_dos="C:/${dir##*/}"
-               ext=${src##*.}
                cp "$src" "$dir/src.$ext"
 
                # compressonator and wine suck, so we sometimes have to retry :(
                for retry in 1 2 3 4 5; do
-                       wine "$HOME/.wine/drive_c/Program Files/AMD/The Compressonator 1.50/TheCompressonator.exe" -convert -mipmaps "$dir_dos/src.$ext" "$dir_dos/dst.dds" $c $f "$@" -mipper BoxFilter.dll
+                       wine "c:/Program Files/AMD/The Compressonator 1.50/TheCompressonator.exe" -convert -mipmaps "$dir_dos/src.$ext" "$dir_dos/dst.dds" $c $f "$@" -mipper BoxFilter.dll
                        if mv "$dir/dst.dds" "$dst"; then
                                break
                        fi
@@ -46,4 +85,18 @@ case "$tool" in
                esac
                nvcompress $f "$@" "$src" "$dst"
                ;;
+       s2tc)
+               case "$format" in
+                       dxt1) f="-t DXT1" ;;
+                       dxt3) f="-t DXT3" ;;
+                       dxt5) f="-t DXT5" ;;
+               esac
+               s2tc $f "$@" -i "$src" -o "$dst"
+               ;;
 esac
+
+if [ -n "$fourcchack" ]; then
+       # use dd to hack in the right FOURCC
+       echo -n "$fourcchack" | dd of="$dst" bs=1 count=4 seek=84 conv=notrunc
+       rm -rf "$fourcchack_dir"
+fi