1#!/bin/sh
 2#
 3# Make a set of test PNG files, MAKEPNG is the name of the makepng executable
 4# built from contrib/libtests/makepng.c
 5
 6# Copyright (c) 2015 John Cunningham Bowler
 7
 8# Last changed in libpng 1.6.20 [December 3, 2015]
 9
10# This code is released under the libpng license.
11# For conditions of distribution and use, see the disclaimer
12# and license in png.h
13
14# The arguments say whether to build all the files or whether just to build the
15# ones that extend the code-coverage of libpng from the existing test files in
16# contrib/pngsuite.
17test -n "$MAKEPNG" || MAKEPNG=./makepng
18opts=
19
20mp(){
21   ${MAKEPNG} $opts $1 "$3" "$4" "$3-$4$2.png"
22}
23
24mpg(){
25   if test "$1" = "none"
26   then
27      mp "" "" "$2" "$3"
28   else
29      mp "--$1" "-$1" "$2" "$3"
30   fi
31}
32
33mptrans(){
34   if test "$1" = "none"
35   then
36      mp "--tRNS" "-tRNS" "$2" "$3"
37   else
38      mp "--tRNS --$1" "-$1-tRNS" "$2" "$3"
39   fi
40}
41
42case "$1" in
43   --small)
44      opts="--small";;&
45
46   --all|--small)
47      for g in none sRGB linear 1.8
48      do
49         for c in gray palette
50         do
51            for b in 1 2 4
52            do
53               mpg "$g" "$c" "$b"
54               mptrans "$g" "$c" "$b"
55            done
56         done
57
58         mpg "$g" palette 8
59         mptrans "$g" palette 8
60
61         for b in 8 16
62         do
63            for c in gray gray-alpha rgb rgb-alpha
64            do
65               mpg "$g" "$c" "$b"
66            done
67            for c in gray rgb
68            do
69               mptrans "$g" "$c" "$b"
70            done
71         done
72      done;;
73
74   --coverage)
75      # Comments below indicate cases known to be required and not duplicated
76      # in other (required) cases; the aim is to get a minimal set that gives
77      # the maxium code coverage.
78      mpg none gray-alpha 8 # required: code coverage, sRGB opaque component
79      mpg none palette 8 # required: basic palette read
80      mpg 1.8 gray 2 # required: tests gamma threshold code
81      mpg 1.8 palette 2 # required: code coverage
82      mpg 1.8 palette 4 # required: code coverage
83      mpg 1.8 palette 8 # error limits only
84      mpg linear palette 8 # error limits only
85      mpg linear rgb-alpha 16 # error limits only
86      mpg sRGB palette 1 # required: code coverage
87      mpg sRGB rgb-alpha 16 # required: code coverage: pngread.c:2422 untested
88      :;;
89
90   *)
91      echo "$0 $1: unknown argument, usage:" >&2
92      echo "  $0 [--all|--coverage|--small]" >&2
93      exit 1
94esac