feat: graphicsmagick support

.gitignore

@@ -0,0 +1 @@
+test*/

Dockerfile

@@ -0,0 +1,9 @@
+FROM docker.io/debian:12-slim
+ENV DEBIAN_FRONTEND=noninteractive
+RUN apt-get update \
+    && apt-get install -y --no-install-recommends \
+        imagemagick \
+        zenity \
+    && rm -rf /var/lib/apt/lists/*
+COPY compress /usr/local/bin/
+CMD ["compress", "/images/"]

compose.yaml

@@ -0,0 +1,12 @@
+---
+services:
+  app:
+    build: .
+    environment:
+      - DISPLAY=$DISPLAY
+      - XAUTHORITY=/.Xauthority
+    volumes:
+      - ./test/:/images/:ro
+      - ./test_1080p/:/images_1080p/
+      - "$XAUTHORITY:/.Xauthority:ro"
+      - "/tmp/.X11-unix/:/tmp/.X11-unix/"

compress

@@ -9,6 +9,30 @@ function wait_queue() {
     done
 }
 
+function compress() {(
+    local nb total dir newdir file
+    cd "$DIR"
+
+    dir="$PWD"
+    total="$(printf '%s\n' * | wc -l)"
+    newdir="${PWD%/*}/$(basename "$dir")_1080p"
+    mkdir -p "$newdir"
+    for file in *; do
+        "${IDENTIFY[@]}" "$file" 2> /dev/null >&2 \
+            && "${CONVERT[@]}" -resize x1080 "$file" "$newdir/$file" &
+        wait_queue
+        nb="$(printf '%s\n' "$newdir"/* | wc -l)"
+        echo "$((nb * 100 / total))"
+    done
+)}
+
+IDENTIFY=(identify)
+CONVERT=(convert)
+if command -v gm > /dev/null; then
+    IDENTIFY=(gm "${IDENTIFY[@]}")
+    CONVERT=(gm "${CONVERT[@]}")
+fi
+
 if [ -z "$1" ]; then
     set "$(zenity --file-selection --multiple --directory --separator='
 ')" > /dev/null
@@ -19,16 +43,5 @@ if [ -z "$1" ]; then
 fi
 
 for DIR in "$@"; do
-    cd "$DIR"
+    compress | zenity --progress --title="$DIR"
-    DIR="$PWD"
-    NEWDIR="${PWD%/*}/$(basename "$DIR")_1080p"
-    mkdir -p "$NEWDIR"
-    for FILE in *; do
-        wait_queue
-        identify "$FILE" 2> /dev/null >&2 \
-            && convert -resize x1080 "$FILE" "$NEWDIR/$FILE" &
 done
-done
-
-wait_queue
-zenity --info --text="Done"

test.sh

@@ -0,0 +1,12 @@
+#!/bin/bash -e
+
+CONVERT=(convert)
+if command -v gm > /dev/null; then
+    CONVERT=(gm "${CONVERT[@]}")
+fi
+
+mkdir -p test test_1080p
+
+"${CONVERT[@]}" -size 3840x2160 xc:black test/000.png
+
+printf '%s\n' {001..127} | xargs -P0 -I'{}' cp test/000.png test/'{}'.png