| 1 | #!/usr/bin/perl -w
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| 2 |
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| 3 | ###########################################################################
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| 4 | #
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| 5 | # green_bar.pl
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| 6 | # A component of the Greenstone digital library software
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| 7 | # from the New Zealand Digital Library Project at the
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| 8 | # University of Waikato, New Zealand.
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| 9 | #
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| 10 | # Copyright (C) 1999 New Zealand Digital Library Project
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| 11 | #
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| 12 | # This program is free software; you can redistribute it and/or modify
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| 13 | # it under the terms of the GNU General Public License as published by
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| 14 | # the Free Software Foundation; either version 2 of the License, or
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| 15 | # (at your option) any later version.
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| 16 | #
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| 17 | # This program is distributed in the hope that it will be useful,
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| 18 | # but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 19 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 20 | # GNU General Public License for more details.
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| 21 | #
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| 22 | # You should have received a copy of the GNU General Public License
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| 23 | # along with this program; if not, write to the Free Software
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| 24 | # Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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| 25 | #
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| 26 | ###########################################################################
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| 27 |
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| 28 | # green_bar.pl generates all the black on green gradient background
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| 29 | # images used by Greenstone.
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| 30 | # these are the icons described in macro files as:
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| 31 | # green version of nav_bar_button
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| 32 | # green_bar_left_aligned
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| 33 |
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| 34 | BEGIN {
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| 35 | die "GSDLHOME not set\n" unless defined $ENV{'GSDLHOME'};
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| 36 | unshift (@INC, "$ENV{'GSDLHOME'}/perllib");
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| 37 | }
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| 38 |
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| 39 | use Gimp;
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| 40 | use parsargv;
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| 41 | use util;
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| 42 |
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| 43 | # set trace level to watch functions as they are executed
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| 44 | #Gimp::set_trace(TRACE_ALL);
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| 45 | #Gimp::set_trace(TRACE_CALL);
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| 46 |
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| 47 | my $gsdl_green = "#96c19b";
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| 48 | my $black = "#000000";
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| 49 |
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| 50 | my ($cfg_file, $width, $height, $text, $filename, $width_space,
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| 51 | $dont_center, $bgcolor, $fontcolor, $fontsize, $fontname,
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| 52 | $fontweight, $fontslant, $fontwidth, $fontspacing, $image_dir);
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| 53 |
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| 54 | sub print_usage {
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| 55 | print STDERR "\n usage: $0 [options] macrofile\n\n";
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| 56 | print STDERR " options:\n";
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| 57 | print STDERR " -cfg_file file configuration file containing one or more\n";
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| 58 | print STDERR " sets of the following options - use to create\n";
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| 59 | print STDERR " batches of images\n";
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| 60 | print STDERR " -image_dir directory directory to create images in [`pwd`]\n";
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| 61 | print STDERR " this should be full path to existing directory\n";
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| 62 | print STDERR " -width number width of bar [87]\n";
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| 63 | print STDERR " -height number height of bar [17]\n";
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| 64 | print STDERR " -text string icon text\n";
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| 65 | print STDERR " -filename string filename of resulting image\n";
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| 66 | print STDERR " -width_space number width in pixels of blank space to leave at left\n";
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| 67 | print STDERR " and right edges of text [1]\n";
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| 68 | print STDERR " -dont_center don't center text horizontally\n";
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| 69 | print STDERR " -bgcolor hex_value background color of bar [$gsdl_green]\n";
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| 70 | print STDERR " -fontcolor hex_value text color [$black]\n";
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| 71 | print STDERR " -fontsize number font point size [17]\n";
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| 72 | print STDERR " -fontname string [lucida]\n";
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| 73 | print STDERR " -fontweight string [medium]\n";
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| 74 | print STDERR " -fontslant [r]\n";
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| 75 | print STDERR " -fontwidth [*]\n";
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| 76 | print STDERR " -fontspacing [*]\n\n";
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| 77 | }
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| 78 |
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| 79 | sub reset_options {
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| 80 | $image_dir = "./";
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| 81 | $width = 87;
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| 82 | $height = 17;
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| 83 | $text = "";
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| 84 | $filename = "";
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| 85 | $width_space = 1;
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| 86 | $dont_center = 0;
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| 87 | $bgcolor = $gsdl_green;
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| 88 | $fontcolor = $black;
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| 89 | $fontsize = 17;
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| 90 | $fontname = "lucida";
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| 91 | $fontweight = "medium";
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| 92 | $fontslant = "r";
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| 93 | $fontwidth = "*";
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| 94 | $fontspacing = "*";
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| 95 | }
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| 96 |
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| 97 | sub gsdl_green_bar {
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| 98 |
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| 99 | if (!parsargv::parse(\@ARGV,
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| 100 | 'cfg_file/.*/', \$cfg_file,
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| 101 | 'image_dir/.*/./', \$image_dir,
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| 102 | 'width/^\d+$/87', \$width,
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| 103 | 'height/^\d+$/17', \$height,
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| 104 | 'text/.*/', \$text,
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| 105 | 'filename/.*', \$filename,
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| 106 | 'width_space/^\d+$/1', \$width_space,
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| 107 | 'dont_center', \$dont_center,
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| 108 | "bgcolor/#[0-9A-Fa-f]{6}/$gsdl_green", \$bgcolor,
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| 109 | "fontcolor/#[0-9A-Fa-f]{6}/$black", \$fontcolor,
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| 110 | 'fontsize/^\d+$/17', \$fontsize,
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| 111 | 'fontname/.*/lucida', \$fontname,
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| 112 | 'fontweight/.*/medium', \$fontweight,
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| 113 | 'fontslant/.*/r', \$fontslant,
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| 114 | 'fontwidth/.*/*', \$fontwidth,
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| 115 | 'fontspacing/.*/*', \$fontspacing)) {
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| 116 | &print_usage();
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| 117 | die "green_bar.pl: incorrect options\n";
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| 118 | }
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| 119 |
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| 120 | # will create wherever gimp was started up from if we don't do this
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| 121 | if ($image_dir eq "./") {
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| 122 | $image_dir = `pwd`;
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| 123 | chomp $image_dir;
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| 124 | }
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| 125 |
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| 126 | if ($cfg_file =~ /\w/) {
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| 127 |
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| 128 | open (CONF, $cfg_file) || die "couldn't open cfg_file $cfg_file\n";
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| 129 | while (1) {
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| 130 |
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| 131 | &reset_options ();
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| 132 |
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| 133 | # read image configuration entry
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| 134 | my $status = &read_config_entry (CONF);
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| 135 | if ($filename !~ /\w/) {
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| 136 | if ($status) {last;}
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| 137 | else {next;}
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| 138 | }
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| 139 |
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| 140 | &produce_image ();
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| 141 | if ($status) {last;}
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| 142 | }
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| 143 |
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| 144 | close CONF;
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| 145 |
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| 146 | } else {
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| 147 |
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| 148 | &produce_image ();
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| 149 |
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| 150 | }
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| 151 | }
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| 152 |
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| 153 | sub produce_image {
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| 154 |
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| 155 | # create image, set background color etc.
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| 156 | my ($image, $backlayer) = &create_image ();
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| 157 |
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| 158 | # set the text if there is any
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| 159 | if (length($text)) {
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| 160 |
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| 161 | my $textlayer = gimp_text ($image, $backlayer, 0, 0, $text, 0, 1,
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| 162 | $fontsize, PIXELS, "*", $fontname, $fontweight,
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| 163 | $fontslant, $fontwidth, $fontspacing);
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| 164 |
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| 165 |
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| 166 | my $textwidth = gimp_drawable_width($textlayer);
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| 167 | my $textheight = gimp_drawable_height($textlayer);
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| 168 |
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| 169 | # check that text fits within image
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| 170 | if ($textheight > $height) {
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| 171 | die "'$text' at fontsize of $fontsize pixels does not fit within image\n" .
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| 172 | "$height pixels high. Decrease fontsize or increase image height\n";
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| 173 | }
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| 174 |
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| 175 | my $spacers = $width_space * 2;
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| 176 |
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| 177 | if ($textwidth > $width) {
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| 178 |
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| 179 | print STDERR "WARNING (green_bar.pl): '$text' does not fit within $width pixel fixed width ";
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| 180 | print STDERR "image. Image width was increased to ",$textwidth + $spacers, " pixels\n";
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| 181 |
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| 182 | $width = $textwidth + $spacers;
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| 183 |
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| 184 | # recreate image in new size
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| 185 | ($image, $backlayer) = &create_image ();
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| 186 | $textlayer = gimp_text ($image, $backlayer, 0, 0, $text, 0, 1,
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| 187 | $fontsize, PIXELS, "*", $fontname, $fontweight,
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| 188 | $fontslant, $fontwidth, $fontspacing);
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| 189 |
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| 190 | }
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| 191 |
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| 192 | my $y_offset = ($height-$textheight)-int($fontsize/5);
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| 193 | if ($text =~ /[gjpqy]/) {
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| 194 | # descenders - put text at bottom of image, otherwise
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| 195 | # go for fontsize/5 pixels above bottom. This is kind of hacky
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| 196 | # and may need some playing with for different fonts/fontsizes
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| 197 | $y_offset = $height-$textheight;
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| 198 | }
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| 199 |
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| 200 | if ($dont_center) {
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| 201 | # don't center text horizontally (start it width_space pixels from left edge)
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| 202 | my $x_offset = $width_space;
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| 203 | gimp_layer_set_offsets ($textlayer, $x_offset, $y_offset);
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| 204 | } else {
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| 205 | gimp_layer_set_offsets ($textlayer, ($width-$textwidth)/2, $y_offset);
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| 206 | }
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| 207 | }
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| 208 |
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| 209 | # flatten the image
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| 210 | my $finishedlayer = gimp_image_flatten ($image);
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| 211 |
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| 212 | # make indexed colour
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| 213 | gimp_convert_indexed ($image, 0, 256);
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| 214 |
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| 215 | # save image
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| 216 | $filename = &util::filename_cat ($image_dir, $filename);
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| 217 |
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| 218 | gimp_file_save (RUN_NONINTERACTIVE, $image, $finishedlayer, $filename, $filename);
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| 219 |
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| 220 | }
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| 221 |
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| 222 | sub create_image {
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| 223 | # create the image
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| 224 | my $image = gimp_image_new ($width, $height, RGB_IMAGE);
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| 225 |
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| 226 | # background layer
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| 227 | my $backlayer = gimp_layer_new ($image, $width, $height, RGB_IMAGE,
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| 228 | "BGLayer", 100, NORMAL_MODE);
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| 229 |
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| 230 | # add the background layer
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| 231 | gimp_image_add_layer ($image, $backlayer, 0);
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| 232 |
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| 233 | # set colour of background
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| 234 | gimp_palette_set_foreground ($bgcolor);
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| 235 |
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| 236 | # clear the background
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| 237 | gimp_selection_all ($image);
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| 238 | gimp_edit_clear ($image, $backlayer);
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| 239 | gimp_selection_none ($image);
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| 240 |
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| 241 | # create the gradient background
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| 242 | gimp_blend ($image, $backlayer, 0, NORMAL_MODE, LINEAR, 70, 0, REPEAT_NONE, 0, 0, 0, 5, $height-3, 5, 0);
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| 243 |
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| 244 | # set colour of text
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| 245 | gimp_palette_set_foreground ($fontcolor);
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| 246 |
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| 247 | return ($image, $backlayer);
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| 248 | }
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| 249 |
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| 250 | # returns 1 if this is the last entry,
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| 251 | sub read_config_entry {
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| 252 | my ($handle) = @_;
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| 253 |
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| 254 | my $line = "";
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| 255 | while (defined ($line = <$handle>)) {
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| 256 | next unless $line =~ /\w/;
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| 257 | my @line = ();
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| 258 | if ($line =~ /^\-+/) {return 0;}
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| 259 | $line =~ s/^\#.*$//; # remove comments
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| 260 | $line =~ s/\cM|\cJ//g; # remove end-of-line characters
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| 261 | $line =~ s/^\s+//; # remove initial white space
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| 262 | while ($line =~ s/\s*(\"[^\"]*\"|\'[^\']*\'|\S+)\s*//) {
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| 263 | if (defined $1) {
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| 264 | # remove any enclosing quotes
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| 265 | my $entry = $1;
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| 266 | $entry =~ s/^([\"\'])(.*)\1$/$2/;
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| 267 |
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| 268 | # substitute any environment variables
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| 269 | $entry =~ s/\$(\w+)/$ENV{$1}/g;
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| 270 | $entry =~ s/\$\{(\w+)\}/$ENV{$1}/g;
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| 271 |
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| 272 | push (@line, $entry);
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| 273 | } else {
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| 274 | push (@line, "");
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| 275 | }
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| 276 | }
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| 277 | if (scalar (@line) == 2 && defined ${$line[0]}) {
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| 278 | ${$line[0]} = $line[1];
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| 279 | }
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| 280 | }
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| 281 | return 1;
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| 282 | }
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| 283 |
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| 284 | sub query {
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| 285 |
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| 286 | gimp_install_procedure("gsdl_green_bar", "create green bar icons for gsdl",
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| 287 | "", "Stefan Boddie", "Stefan Boddie", "2000-03-10",
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| 288 | "<Toolbox>/Xtns/gsdl_green_bar", "*", &PROC_EXTENSION,
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| 289 | [[PARAM_INT32, "run_mode", "Interactive, [non-interactive]"]], []);
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| 290 | }
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| 291 |
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| 292 | sub net {
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| 293 | gsdl_green_bar;
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| 294 | }
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| 295 |
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| 296 | exit main;
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