add screen snapshot

Signed-off-by: Michel-FK <michel.stempin@funkey-project.com>

FunKey/board/funkey/rootfs-overlay/etc/funkey_gpio_mapping.conf

@@ -49,6 +49,7 @@
 13, KEYBOARD, KEY_Y, KEY_Y, Y
 11, KEYBOARD, KEY_X, KEY_X, X
 
+7+6, SHELL_COMMAND, snap, Fn+Start, Snapshot
 7+12, SHELL_COMMAND, quick_action_volume_up, Fn+Y, Volume++
 7+13, SHELL_COMMAND, quick_action_volume_down, Fn+A, Volume--
 7+11, SHELL_COMMAND, quick_action_bright_up, Fn+B, Brightness++

FunKey/board/funkey/rootfs-overlay/usr/local/sbin/snap

@@ -0,0 +1,18 @@
+#!/bin/sh
+SNAPSHOT_DIR=/mnt/funkey/snapshots
+# Check args
+if [ ${#} -ne 0 ]; then
+    echo "Usage: $(basename ${0})"
+    exit 1
+fi
+mkdir -p "${SNAPSHOT_DIR}"
+last=$(cd ${SNAPSHOT_DIR}; ls IMG_*.PNG 2> /dev/null | tail -1 | sed 's/^IMG_\([0-9]\+\)\.PNG$/\1/')
+if [ "x${last}" = "x" ]; then
+    last=1
+else
+    let last++
+fi
+snapshot_file=$(printf "IMG_%04d.PNG" $last)
+fbgrab "${SNAPSHOT_DIR}/${snapshot_file}"
+notif_disp 1 "   CAPTURE TO ${snapshot_file}"
+exit 0

Recovery/board/funkey/rootfs-overlay/etc/funkey_gpio_mapping.conf

@@ -49,6 +49,7 @@
 13, KEYBOARD, KEY_Y, KEY_Y, Y
 11, KEYBOARD, KEY_X, KEY_X, X
 
+7+6, SHELL_COMMAND, snap, Fn+Start, Snapshot
 7+12, SHELL_COMMAND, quick_action_volume_up, Fn+Y, Volume++
 7+13, SHELL_COMMAND, quick_action_volume_down, Fn+A, Volume--
 7+11, SHELL_COMMAND, quick_action_bright_up, Fn+B, Brightness++

Recovery/board/funkey/rootfs-overlay/usr/local/sbin/snap

@@ -0,0 +1,21 @@
+#!/bin/sh
+
+SNAPSHOT_DIR=/mnt/funkey/snapshots
+
+# Check args
+if [ ${#} -ne 0 ]; then
+    echo "Usage: $(basename ${0})"
+    exit 1
+fi
+
+mkdir -p "${SNAPSHOT_DIR}"
+last=$(cd ${SNAPSHOT_DIR}; ls IMG_*.PNG 2> /dev/null | tail -1 | sed 's/^IMG_\([0-9]\+\)\.PNG$/\1/')
+if [ "x${last}" = "x" ]; then
+    last=1
+else
+    let last++
+fi
+snapshot_file=$(printf "IMG_%04d.PNG" $last)
+fbgrab "${SNAPSHOT_DIR}/${snapshot_file}"
+notif_disp 1 "   CAPTURE TO ${snapshot_file}"
+exit 0