shader audit: support auditing heights/normalmaps

diff --git a/scripts/shader-audit.sh b/scripts/shader-audit.sh
index ab8de9070307869da062163a12479301c54da711..3f0fb83b9e7c2ce6fbd9eecea1c3aca68ed12934 100755 (executable)
--- a/scripts/shader-audit.sh
+++ b/scripts/shader-audit.sh
@@ -25,6 +25,41 @@ normalize()
 allowed_prefixes=
 forbidden_prefixes=
 
+getstats_e()
+{
+       identify -verbose -alpha extract -depth 8 "$1" | {
+               pix=0
+               while read -r L V R; do
+                       case "$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"
+       }
+}
+getstats()
+{
+       eval `getstats_e "$1"`
+}
+
 textures_used=
 # $1 = shader
 # $2 = texture
@@ -46,6 +81,40 @@ use_texture()
        fi
        textures_used="$textures_used$LF$2"
 
+       if [ x"$3" = x"map" ]; then
+               lasttex=$2
+               if [ -n "$AUDIT_OFFSETMAPPING" ]; then
+                       if [ -f "../${2}_norm.tga" ]; then
+                               case "$offsetmapping_match8" in
+                                       '') # no dpoffsetmapping keyword
+                                               getstats "../${2}_norm.tga"
+                                               if [ "$min" -eq "$max" ]; then
+                                                       echo "(EE) shader $1 uses broken normalmap ${2}_norm.tga (add dpoffsetmapping none)"; seterror
+                                               else
+                                                       echo "(EE) shader $1 uses ${2}_norm.tga but lacks median (add dpoffsetmapping with: match8 $median)"; seterror
+                                               fi
+                                               ;;
+                                       none) # offsetmapping turned off explicitly
+                                               ;;
+                                       default) # offsetmapping keyword without bias
+                                               getstats "../${2}_norm.tga"
+                                               if [ "$min" -eq "$max" ]; then
+                                                       echo "(EE) shader $1 uses broken normalmap ${2}_norm.tga, maybe use dpoffsetmapping none?"; seterror
+                                               else
+                                                       echo "(EE) shader $1 uses ${2}_norm.tga but lacks median (add to dpoffsetmapping: match8 $median)"; seterror
+                                               fi
+                                               ;;
+                                       *) # offsetmapping keyword with bias
+                                               ;;
+                               esac
+                       else
+                               if [ -n "$offsetmapping_match8" ]; then
+                                       echo "(EE) shader $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 $allowed_prefixes; do
@@ -197,7 +266,7 @@ parse_shaderstage()
 {
        while read L A1 Aother; do
                case "`echo "$L" | tr A-Z a-z`" in
-                       map)
+                       map|clampmap)
                                case "$A1" in
                                        '$lightmap')
                                                ;;
@@ -226,8 +295,29 @@ parse_shaderstage()
 parse_shader()
 {
        use_texture "$parsing_shader" "$parsing_shader" shader
+       offsetmapping_match8=
        while read L A1 Aother; do
                case "`echo "$L" | tr A-Z a-z`" in
+                       dpoffsetmapping)
+                               set -- $Aother
+                               if [ x"$A1" = x"none" ]; then
+                                       offsetmapping_match8=none
+                               elif [ x"$A1" = x"off" ]; then
+                                       offsetmapping_match8=none
+                               elif [ x"$A1" = x"disabled" ]; then
+                                       offsetmapping_match8=none
+                               elif [ x"$2" = x"match8" ]; then
+                                       offsetmapping_match8=`echo "($3 + 0.5) / 1" | bc`
+                               elif [ x"$2" = x"match16" ]; then
+                                       offsetmapping_match8=`echo "($3 / 257 + 0.5) / 1" | bc`
+                               elif [ x"$2" = x"match" ]; then
+                                       offsetmapping_match8=`echo "($3 * 255 + 0.5) / 1" | bc`
+                               elif [ x"$2" = x"bias" ]; then
+                                       offsetmapping_match8=`echo "((1 - $3) * 255 + 0.5) / 1" | bc`
+                               else
+                                       offsetmapping_match8=default
+                               fi
+                               ;;
                        qer_editorimage)
                                use_texture "$parsing_shader" "`normalize "$A1"`" editorimage
                                ;;