fix: Display config (#519)

* fix: Display config

src/display.sh

@@ -0,0 +1,42 @@
+#!/usr/bin/env bash
+set -Eeuo pipefail
+
+# Docker environment variables
+
+: ${GPU:='N'}           # GPU passthrough
+: ${DISPLAY:='none'}  # Display type
+
+case "${DISPLAY,,}" in
+  vnc)
+    DISPLAY_OPTS="-display vnc=:0 -vga virtio"
+    ;;
+  *)
+    DISPLAY_OPTS="-display $DISPLAY -vga none"
+    ;;
+esac
+
+if [[ "$GPU" != [Yy1]* ]] || [[ "$ARCH" != "amd64" ]]; then
+  return 0
+fi
+
+DISPLAY_OPTS="-display egl-headless,rendernode=/dev/dri/renderD128 -vga virtio"
+[[ "${DISPLAY,,}" == "vnc" ]] && DISPLAY_OPTS="$DISPLAY_OPTS -vnc :0"
+
+[ ! -d /dev/dri ] && mkdir -m 755 /dev/dri
+
+if [ ! -c /dev/dri/card0 ]; then
+  if mknod /dev/dri/card0 c 226 0; then
+    chmod 666 /dev/dri/card0
+  fi
+fi
+
+if [ ! -c /dev/dri/renderD128 ]; then
+  if mknod /dev/dri/renderD128 c 226 128; then
+    chmod 666 /dev/dri/renderD128
+  fi
+fi
+
+addPackage "xserver-xorg-video-intel" "Intel GPU drivers"
+addPackage "qemu-system-modules-opengl" "OpenGL module"
+
+return 0