devshell/screenshot

#!/bin/bash
# Copyright 2018 The Fuchsia Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

### takes a screenshot and copies it to the host

## usage: fx screenshot [--landscape] [--png] [--trim] [-o <screencap_file>]
##
## This command invokes Fuchsia's screencap tool to create a screenshot.
## The result is written to screencap.ppm or screencap.png. To write to
## another filename, use the -o parameter.
## The --trim, --landscape and --png commands require ImageMagick to be
## installed.  Unrecognized parameters will be passed to ssh.
##
## -o FILENAME     Write to the given filename instead of screencap.ppm
## --png           Create a .png file instead of a .ppm file
## --trim          Remove black borders
## --landscape     Rotate image ninety degrees
##
## Example usage:
##   fx screenshot --trim --png --landscape

set -e

source "$(cd "$(dirname "${BASH_SOURCE[0]}")" >/dev/null 2>&1 && pwd)"/lib/vars.sh || exit $?
fx-config-read

OUT=screencap.ppm
png_command=cat
enable_trim=0
enable_landscape=0
while [[ $# -ne 0 ]]; do
  case $1 in
  -h|--help)
    fx-command-help
    exit 0
    ;;
  -o|--out)
    shift
    OUT=$1
    ;;
  --png)
    OUT=${OUT%.*}.png
    png_command=pnmtopng
    ;;
  --landscape)
    enable_landscape=1
    ;;
  --trim)
    enable_trim=1
    ;;
  *)
    break
    ;;
  esac
  shift
done

fx-command-run shell "$@" screencap | $png_command > "$OUT"
mog_opts=
if [[ $enable_trim -ne 0 ]]; then
  mog_opts="$mog_opts -trim +repage"
fi
if [[ $enable_landscape -ne 0 ]]; then
  mog_opts="$mog_opts -rotate 90"
fi
if [[ ! -z $mog_opts ]]; then
  # Also add a black border so it's easier to see the image when
  # pasted into the bug database.
  mogrify -bordercolor black -border 3 $mog_opts $OUT
fi