+case "$0" in
+ */*)
+ cd "${0%/*}"
+ ;;
+esac
+
+pid=$$
+status=true
+trap 'status=false' USR1
+seterror()
+{
+ kill -USR1 "$pid"
+}
+
+nowarn=false
+err()
+{
+ echo "(EE) $*"
+ seterror
+}
+warn()
+{
+ $nowarn || echo "(WW) $*"
+}
+
+LF="
+"
+
+normalize()
+{
+ echo "$1" | sed 's/\.\(tga\|jpg\|png\)$//'
+}
+
+allowed_prefixes=
+forbidden_prefixes=
+
+getstats_e()
+{
+ identify -verbose -depth 8 -alpha set -alpha extract "$1" | {
+ pix=0
+ while read -r L V R; do
+ case "$L" in
+ Geometry:)
+ V=${V%%[-+]*}
+ pix=$(( (${V%%x*} * ${V#*x}) / 2 ))
+ ;;
+ min:)
+ min=$V
+ ;;
+ max:)
+ max=$V
+ ;;
+ [0-9]*:)
+ pix=$(( $pix - ${L%:} ))
+ if [ $pix -le 0 ]; then
+ median=`echo "$V $R" | cut -d , -f 1 | tr -cd 0-9`
+ break
+ fi
+ esac
+ done
+ cat >/dev/null
+ echo "min=$min"
+ echo "max=$max"
+ echo "median=$median"
+ echo "error=false"
+ }
+}
+getstats()
+{
+ min=255
+ max=255
+ median=255
+ error=true
+ [ -f "$1" ] || return 1
+ eval `getstats_e "$1"`
+}
+
+textures_used=
+# $1 = shader
+# $2 = texture
+# $3 = shader | map | animmap | editorimage | sky
+use_texture()
+{
+ # does texture exist?
+ if \
+ [ -f "../$2.tga" ] || \
+ [ -f "../$2.jpg" ] || \
+ [ -f "../$2.png" ]; then
+ :
+ else
+ if [ "$3" = "shader" ]; then
+ return
+ else
+ err "$1 uses non-existing texture $2"
+ fi
+ fi
+ textures_used="$textures_used$LF$2"
+
+ if [ x"$3" = x"map" ]; then
+ lasttex=$2
+ if [ -n "$AUDIT_ALPHACHANNELS" ] && [ x"$offsetmapping_match8" != x"firststagedone" ]; then
+ if [ -f "../${2}_norm.tga" ] || [ -f "../${2}_norm.png" ] || [ -f "../${2}_norm.jpg" ]; then
+ case "$offsetmapping_match8" in
+ '') # no dpoffsetmapping keyword
+ getstats "../${2}_norm.tga" || getstats "../${2}_norm.png" || getstats "../${2}_norm.jpg"
+ if [ "$min" -eq "$max" ]; then
+ warn "$1 uses broken normalmap ${2}_norm.tga (add dpoffsetmapping none)"
+ else
+ err "$1 uses ${2}_norm.tga but lacks median (add dpoffsetmapping - 1 match8 $median)"
+ fi
+ ;;
+ none) # offsetmapping turned off explicitly
+ ;;
+ default) # offsetmapping keyword without bias
+ getstats "../${2}_norm.tga"
+ if [ "$min" -eq "$max" ]; then
+ warn "$1 uses broken normalmap ${2}_norm.tga, maybe use dpoffsetmapping none?"
+ else
+ err "$1 uses ${2}_norm.tga but lacks median (add to dpoffsetmapping: match8 $median)"
+ fi
+ ;;
+ *) # offsetmapping keyword with bias
+ ;;
+ esac
+ else
+ if [ -n "$offsetmapping_match8" ]; then
+ warn "$1 specifies offsetmapping, but texture $2 does not have a normalmap"
+ fi
+ fi
+ fi
+ fi
+
+ if [ -n "$allowed_prefixes" ]; then
+ ok=false
+ for p in $allowed_prefixes; do
+ case "$1:" in
+ "$p"*)
+ ok=true
+ ;;
+ esac
+ done
+ else
+ ok=true
+ fi
+ for p in $forbidden_prefixes; do
+ case "$1:" in
+ "$p"*)
+ ok=false
+ ;;
+ esac
+ done
+ if ! $ok; then
+ err "$1 is not allowed in this shader file (allowed: $allowed_prefixes, forbidden: $forbidden_prefixes)"
+ fi
+
+ case "$3" in
+ ## RULE: skyboxes must lie in env/
+ sky)
+ case "$2" in
+ env/*)
+ ;;
+ *)
+ err "texture $2 of shader $1 is out of place, $3 textures must be in env/"
+ ;;
+ esac
+ ;;
+ ## RULE: non-skyboxes must not lie in env/
+ *)
+ case "$2" in
+ env/*)
+ err "texture $2 of shader $1 is out of place, $3 textures must not be in env/"
+ ;;
+ *)
+ ;;
+ esac
+ ;;
+ esac
+
+ # verify shader -> texture name
+ case "$1" in
+ ## RULE: textures/FOOx/BAR-BAZ must use textures/FOOx/*/*, recommended textures/FOOx/BAR/BAZ
+ textures/*x/*-*)
+ pre=${1%%x/*}x
+ suf=${1#*x/}
+ suf="`echo "$suf" | sed 's,-,/,g'`"
+ case "$2" in
+ "$pre"/*/*)
+ ;;
+ *)
+ err "texture $2 of shader $1 is out of place, recommended file name is $pre/$suf"
+ ;;
+ esac
+ ;;
+ ## RULE: textures/FOOx/BAR must use textures/FOOx/*/*, recommended textures/FOOx/base/BAR
+ textures/*x/*)
+ pre=${1%%x/*}x
+ suf=${1#*x/}
+ case "$2" in
+ "$pre"/*/*)
+ ;;
+ *)
+ err "texture $2 of shader $1 is out of place, recommended file name is $pre/base/$suf"
+ ;;
+ esac
+ ;;
+ ## RULE: textures/map_FOO[_/]* must use textures/map_FOO[_/]*
+ textures/map_*/*)
+ pre=${1%%/map_*}
+ suf=${1#*/map_}
+ map=${suf%%[_/]*}
+ case "$2" in
+ "$pre"/map_$map[/_]*)
+ ;;
+ textures/map_*)
+ # protect one map's textures from the evil of other maps :P
+ err "texture $2 of shader $1 is out of place, recommended file name is $pre/map_$map/*"
+ ;;
+ *)
+ # using outside stuff is permitted
+ ;;
+ esac
+ ;;
+ ## RULE: textures/common/FOO must use textures/common/FOO or textures/common/*/*
+ textures/common/*)
+ case "$2" in
+ "$1")
+ ;;
+ textures/common/*/*)
+ ;;
+ *)
+ err "texture $2 of shader $1 is out of place, recommended file name is $1 or textures/common/*/*"
+ ;;
+ esac
+ ;;
+ ## RULE: textures/FOO/* must use textures/FOO/*, for FOO in decals, liquids_water, liquids_slime, liquids_lava, alphamod
+ textures/decals/*|textures/liquids_*/*|textures/effects_*/*|textures/screens/*|textures/logos/*|textures/alphamod/*)
+ pre=`echo "$1" | cut -d / -f 1-2`
+ case "$2" in
+ "$pre"/*)
+ # I _suppose_ this is fine, as tZork committed this pack
+ ;;
+ *)
+ err "texture $2 of shader $1 is out of place, recommended file name is $1"
+ ;;
+ esac
+ ;;
+ ## RULE: textures/skies/FOO or textures/skies/FOO_BAR must use textures/skies/FOO respective textures/skies/FOO_BAR as preview image, and env/FOO[_/]* as skybox
+ textures/skies/*)
+ sky=${1#textures/skies/}
+ sky=${sky%%_*}
+ case "$2" in
+ textures/skies/$sky|textures/skies/$sky[_]*)
+ # typical place for preview image
+ ;;
+ env/$sky[/_]*)
+ # typical place for skybox
+ ;;
+ *)
+ err "texture $2 of shader $1 is out of place, recommended file name is $1"
+ ;;
+ esac
+ ;;
+ ## RULE: models/* must use models/*
+ models/*)
+ case "$2" in
+ models/*)
+ ;;
+ *)
+ err "texture $2 of shader $1 is out of place, recommended file name is $1 or models/*"
+ ;;
+ esac
+ ;;
+ *)
+ err "no shader name pattern for $1"
+ ;;
+ esac
+}
+
+parsing_shader=
+parse_shaderstage()
+{
+ ss_blendfunc=none
+ ss_alphafunc=none
+ ss_alphagen=none
+ ss_map=
+ while read L A1 Aother; do
+ case "`echo "$L" | tr A-Z a-z`" in
+ blendfunc)
+ ss_blendfunc=`echo $A1 $Aother | tr A-Z a-z`
+ ;;
+ alphafunc)
+ ss_alphafunc=`echo $A1 | tr A-Z a-z`
+ ;;
+ alphagen)
+ ss_alphagen=`echo $A1 | tr A-Z a-z`
+ ;;
+ map|clampmap)
+ case "$A1" in
+ '$lightmap')
+ ;;
+ *)
+ use_texture "$parsing_shader" "`normalize "$A1"`" map
+ ss_map="`normalize "$A1"`"
+ offsetmapping_match8=firststagedone
+ ;;
+ esac
+ ;;
+ animmap)
+ for X in $Aother; do
+ use_texture "$parsing_shader" "`normalize "$X"`" animmap
+ done
+ for X in $Aother; do
+ ss_map="`normalize "$X"`"
+ break
+ done
+ ;;
+ '{')
+ err "brace nesting error in $parsing_shader"
+ ;;
+ '}')
+ break
+ ;;
+ *)
+ ;;
+ esac
+ done
+
+ if [ -n "$ss_map" ]; then
+ if [ -z "$maintexture" ]; then
+ maintexture=$ss_map
+ mainblendfunc=$ss_blendfunc
+ mainalphafunc=$ss_alphafunc
+ mainalphagen=$ss_alphagen
+ elif [ x"$ss_alphagen" = x"vertex" ] && ! $textureblending; then
+ case "$mainblendfunc:$mainalphafunc:$ss_blendfunc:$ss_alphafunc" in
+ none:none:"gl_src_alpha gl_one_minus_src_alpha":none) textureblending=true ;;
+ none:none:filter:none) textureblending=true ;;
+ none:none:none:g*) textureblending=true ;;
+ "gl_one gl_zero":none:filter:none) textureblending=true ;;
+ "gl_one gl_zero":none:none:g*) textureblending=true ;;
+ *)
+ err "texture blending requires first stage to have no blendfunc/alphatest, and requires second stage to be blendfunc filter"
+ ;;
+ esac
+ else
+ err "multistage shader without alphagen vertex, or using more than 2 stages, is not supported by DarkPlaces"
+ fi