e0433c68 |
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" |