improve conversion script to support multiple backends

1 files changed, 43 insertions, 4 deletions

diff --git a/contrib/convert-svgs-to-pngs b/contrib/convert-svgs-to-pngs
index a132794..d17136e 100755
--- a/contrib/convert-svgs-to-pngs
+++ b/contrib/convert-svgs-to-pngs
@@ -1,14 +1,53 @@
 #!/bin/bash
 # This file is in the public domain.
 # Convert local SVGs to the PNGs for display.
+
+# Please make sure you have the relevant fonts installed - in the case of the builtin SVGs, these are the following:
+# All:
+#   - Roboto          (Arch: `ttf-roboto`)
+# ADs:
+#   - Inter           (Arch: `inter-font`)
+#   - Source Sans Pro (Arch: `adobe-source-sans-fonts`)
+# Err:
+#   - JetBrains Mono  (Arch: `ttf-jetbrains-mono`)
+
 set -eu
-for dir in err;
+
+# General Config
+echo "${CONVERSION_TOOL:=inkscape}" &> /dev/null; # Which conversion tool to use - "im" (imagemagick), "gm" (graphicsmagick, can produce weird font results) and "inkscape"
+echo "${TARGET_RESOLUTION:="768x576"}" &> /dev/null; # The final output resolution
+
+# Imagemagick/Graphicsmagick Options
+echo "${IM_SCALE_RESOLUTION:="1536x1152"}" &> /dev/null; # The resolution we set when telling magick to parse the SVG - higher than TARGET_RESOLUTION due to some blurry imagery caused by imagemagick otherwise.
+
+# Loop over every directory with imagesfor dir in err ads;
+for dir in err ads;
 do
   mkdir -p "${dir}/png"
+
+  if [[ "$CONVERSION_TOOL" == "inkscape" ]]; then
+    width=$(echo -n "$TARGET_RESOLUTION" | sed 's/x/ /' | awk '{print $1}')
+    height=$(echo -n "$TARGET_RESOLUTION" | sed 's/x/ /' | awk '{print $2}')
+  fi;
+
+  # Convert them
   for svg in "${dir}/svg/"*; 
-  do 
+  do
     png=$(sed 's/svg/png/g' <<< "$svg");
-    echo "Converting $svg to $png"
-    inkscape -w 768 -h 576 "$svg" -o "$png" &> /dev/null
+    echo "Converting $svg to $png with $CONVERSION_TOOL";
+    case "$CONVERSION_TOOL" in
+      "im")
+        magick convert -density "$TARGET_RESOLUTION" "$svg" -resize "$TARGET_RESOLUTION" "$png";
+        ;;
+      "gm")
+        gm convert -density "$TARGET_RESOLUTION" "$svg" -resize "$TARGET_RESOLUTION" "$png";
+        ;;
+      "inkscape")
+        inkscape -w "$width" -h "$height" "$svg" -o "$png" &> /dev/null
+        ;;
+      *)
+        echo "FATAL: Invalid tool \"$CONVERSION_TOOL\"" 1>&2
+        ;;
+    esac;
   done;
 done;