| 1 | #!/bin/sh |
| 2 | |
| 3 | # Crop one image into another, after first checking that the source |
| 4 | # image has the expected size in pixels. |
| 5 | # |
| 6 | # This is used in the Puzzles icon build scripts to construct icons |
| 7 | # which are zoomed in on a particular sub-area of the puzzle's |
| 8 | # basic screenshot. This way I can define crop areas in pixels, |
| 9 | # while not having to worry too much that if I adjust the source |
| 10 | # puzzle so as to alter the layout the crop area might start |
| 11 | # hitting the wrong bit of picture. Most layout changes I can |
| 12 | # conveniently imagine will also alter the overall image size, so |
| 13 | # this script will give a build error and alert me to the fact that |
| 14 | # I need to fiddle with the icon makefile. |
| 15 | |
| 16 | infile="$1" |
| 17 | outfile="$2" |
| 18 | insize="$3" |
| 19 | crop="$4" |
| 20 | |
| 21 | # Special case: if no input size or crop parameter was specified at |
| 22 | # all, we just copy the input to the output file. |
| 23 | |
| 24 | if test $# -lt 3; then |
| 25 | cp "$infile" "$outfile" |
| 26 | exit 0 |
| 27 | fi |
| 28 | |
| 29 | # Check the input image size. |
| 30 | realsize=`identify -format %wx%h "$infile"` |
| 31 | if test "x$insize" != "x$realsize"; then |
| 32 | echo "crop.sh: '$infile' has wrong initial size: $realsize != $insize" >&2 |
| 33 | exit 1 |
| 34 | fi |
| 35 | |
| 36 | # And crop. |
| 37 | convert -crop "$crop" "$infile" "$outfile" |