A tool to generate notification images

notification_images/generate_images.sh

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+#!/bin/bash
+# vim: tabstop=4 expandtab shiftwidth=4 softtabstop=4 syn=bash
+
+function make_image() {
+    BASENAME="$1"
+    TEXTCOLOR="$2"
+    STROKE="$3"
+    BGCOLOR="$4"
+    MSG="$5"
+    FS=$6
+    EXTS="jpg png"
+
+    echo "${BASENAME}" | grep -qEi '[.](${EXTS/ /|})'
+    if [ $? -ne 1 ] ; then
+        echo "run this function with only the image basename, eg."
+        echo "make_image StartingUp '#00ff00' '#000000' '#404040' 'Allsky Starting Up'"
+        exit 1
+    fi
+
+    # Hack to make these images more detectable. Typically camera images are
+    # at least an even number of pixels, and usually a multiple of 8 pixels.
+    # So just in case someone has a camera configured for 960x720 images, or
+    # is rescaling to 960x720... this will allow them to be detected.
+    IM_SIZE="959x719"
+    FONT="Arial"
+    FONT_SIZE=${FS:-128}
+    SW="2"
+
+    for EXT in ${EXTS} ; do
+        convert \
+            -background "${BGCOLOR}" \
+            -fill "${TEXTCOLOR}" \
+            -strokewidth "${SW}" \
+            -stroke "${STROKE}" \
+            -size "${IM_SIZE}" \
+            -font "${FONT}" \
+            -pointsize "${FONT_SIZE}" \
+            -gravity center \
+            -depth 8 \
+            label:"${MSG}" \
+            "${BASENAME}.${EXT}"
+    done
+
+}
+
+if [ -z "$(which mogrify)" ] ; then
+    # Testing for mogrify which seems like a much more distinctive executable
+    # name than "convert". I assume that if "mogrify" is in the path, then
+    # ImageMagick is installed and "convert" will run ImageMagick and not some
+    # other tool.
+    echo ImageMagick does not appear to be installed. Please install it.
+    exit 1
+fi
+
+#          BaseName           TxtColor  Stroke    BgColor   Message                                                       FontSize
+make_image NotRunning         "#ff0000" "#000000" "#404040" "Allsky Software\nis not running"
+make_image DarkFrames         "#00ff00" "#ffffff" "#000000" "Camera is taking\ndark frames"
+make_image StartingUp         "#00ff00" "#000000" "#404040" "Allsky Software\nis starting up"
+make_image CameraOffDuringDay "#ffff4a" "#000000" "#404040" "Camera is off\nduring the day"
+make_image Error              "#ff0000" "#000000" "#404040" "ERROR: See\n/var/log/allsky.log\nfor details"                110