Mercurial > fife-parpg

annotate ext/libpng-1.2.29/contrib/gregbook/readppm.c @ 164:5b04a7d3ded6

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typo fix some missing event (de)registrations ability to capture one event multiple times (instead of only having one slot, we have groups and each group has an own slot, the default group is "default" so we are backward compatible
author spq@33b003aa-7bff-0310-803a-e67f0ece8222
date Wed, 15 Oct 2008 14:57:04 +0000
parents 4a0efb7baf70
children
rev   line source
0
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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1 /*---------------------------------------------------------------------------
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2
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3 rpng - simple PNG display program readppm.c
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4
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5 ---------------------------------------------------------------------------
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6
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7 This is a special-purpose replacement for readpng.c that allows binary
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8 PPM files to be used in place of PNG images.
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9
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10 ---------------------------------------------------------------------------
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11
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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12 Copyright (c) 1998-2007 Greg Roelofs. All rights reserved.
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13
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14 This software is provided "as is," without warranty of any kind,
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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15 express or implied. In no event shall the author or contributors
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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16 be held liable for any damages arising in any way from the use of
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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17 this software.
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18
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19 The contents of this file are DUAL-LICENSED. You may modify and/or
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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20 redistribute this software according to the terms of one of the
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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21 following two licenses (at your option):
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22
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23
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24 LICENSE 1 ("BSD-like with advertising clause"):
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25
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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26 Permission is granted to anyone to use this software for any purpose,
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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27 including commercial applications, and to alter it and redistribute
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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28 it freely, subject to the following restrictions:
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29
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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30 1. Redistributions of source code must retain the above copyright
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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31 notice, disclaimer, and this list of conditions.
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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32 2. Redistributions in binary form must reproduce the above copyright
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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33 notice, disclaimer, and this list of conditions in the documenta-
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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34 tion and/or other materials provided with the distribution.
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35 3. All advertising materials mentioning features or use of this
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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36 software must display the following acknowledgment:
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37
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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38 This product includes software developed by Greg Roelofs
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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39 and contributors for the book, "PNG: The Definitive Guide,"
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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40 published by O'Reilly and Associates.
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41
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42
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43 LICENSE 2 (GNU GPL v2 or later):
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44
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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45 This program is free software; you can redistribute it and/or modify
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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46 it under the terms of the GNU General Public License as published by
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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47 the Free Software Foundation; either version 2 of the License, or
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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48 (at your option) any later version.
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49
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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50 This program is distributed in the hope that it will be useful,
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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51 but WITHOUT ANY WARRANTY; without even the implied warranty of
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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52 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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53 GNU General Public License for more details.
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54
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55 You should have received a copy of the GNU General Public License
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56 along with this program; if not, write to the Free Software Foundation,
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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57 Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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58
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59 ---------------------------------------------------------------------------*/
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60
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61 #include <stdio.h>
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62 #include <stdlib.h>
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63
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64 #include "readpng.h" /* typedefs, common macros, public prototypes */
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65
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66
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67 ulg width, height;
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68 int bit_depth, color_type, channels;
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69 uch *image_data = NULL;
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70 FILE *saved_infile;
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71
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72
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73 void readpng_version_info()
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74 {
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75 fprintf(stderr, " Compiled without libpng, zlib or PBMPLUS/NetPBM.\n");
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76 }
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77
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78
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79 /* return value = 0 for success, 1 for bad sig, 2 for bad IHDR, 4 for no mem */
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80
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81 int readpng_init(FILE *infile, ulg *pWidth, ulg *pHeight)
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82 {
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83 static uch ppmline[256];
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84 int maxval;
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85
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86
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87 saved_infile = infile;
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88
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89 fgets(ppmline, 256, infile);
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90 if (ppmline[0] != 'P' || ppmline[1] != '6') {
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91 fprintf(stderr, "ERROR: not a PPM file\n");
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92 return 1;
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93 }
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94 /* possible color types: P5 = grayscale (0), P6 = RGB (2), P8 = RGBA (6) */
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95 if (ppmline[1] == '6') {
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96 color_type = 2;
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97 channels = 3;
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98 } else if (ppmline[1] == '8') {
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99 color_type = 6;
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100 channels = 4;
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101 } else /* if (ppmline[1] == '5') */ {
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102 color_type = 0;
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103 channels = 1;
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104 }
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105
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106 do {
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107 fgets(ppmline, 256, infile);
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108 } while (ppmline[0] == '#');
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109 sscanf(ppmline, "%lu %lu", &width, &height);
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
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110
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
111 do {
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
112 fgets(ppmline, 256, infile);
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
113 } while (ppmline[0] == '#');
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
114 sscanf(ppmline, "%d", &maxval);
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
115 if (maxval != 255) {
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
116 fprintf(stderr, "ERROR: maxval = %d\n", maxval);
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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117 return 2;
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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118 }
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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119 bit_depth = 8;
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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120
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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121 *pWidth = width;
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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122 *pHeight = height;
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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123
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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124 return 0;
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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125 }
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
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126
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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127
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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128
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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129
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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130 /* returns 0 if succeeds, 1 if fails due to no bKGD chunk, 2 if libpng error;
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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131 * scales values to 8-bit if necessary */
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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132
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
133 int readpng_get_bgcolor(uch *red, uch *green, uch *blue)
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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134 {
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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135 return 1;
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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136 }
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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137
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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138
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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139
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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140
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
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141 /* display_exponent == LUT_exponent * CRT_exponent */
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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142
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
143 uch *readpng_get_image(double display_exponent, int *pChannels, ulg *pRowbytes)
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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144 {
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
145 ulg rowbytes;
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
146
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
147
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
148 /* expand palette images to RGB, low-bit-depth grayscale images to 8 bits,
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
149 * transparency chunks to full alpha channel; strip 16-bit-per-sample
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
150 * images to 8 bits per sample; and convert grayscale to RGB[A] */
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
151
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
152 /* GRR WARNING: grayscale needs to be expanded and channels reset! */
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
153
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
154 *pRowbytes = rowbytes = channels*width;
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
155 *pChannels = channels;
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
156
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
157 if ((image_data = (uch *)malloc(rowbytes*height)) == NULL) {
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
158 return NULL;
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
159 }
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
160
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
161 Trace((stderr, "readpng_get_image: rowbytes = %ld, height = %ld\n", rowbytes, height));
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
162
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
163
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
164 /* now we can go ahead and just read the whole image */
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
165
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
166 fread(image_data, 1L, rowbytes*height, saved_infile);
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
167
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
168
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
169 return image_data;
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
170 }
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
171
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
172
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
173 void readpng_cleanup(int free_image_data)
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
174 {
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
175 if (free_image_data && image_data) {
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
176 free(image_data);
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
177 image_data = NULL;
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
178 }
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
179 }