Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1 | |
| 2 | /* pngset.c - storage of image information into info struct |
Glenn Randers-Pehrson | b6ce43d | 1998-01-01 07:13:13 -0600 | [diff] [blame] | 3 | * |
Glenn Randers-Pehrson | 67ee8ce | 2011-12-22 08:21:00 -0600 | [diff] [blame] | 4 | * Last changed in libpng 1.6.0 [(PENDING RELEASE)] |
Glenn Randers-Pehrson | 9477ecd | 2013-01-01 07:45:42 -0600 | [diff] [blame] | 5 | * Copyright (c) 1998-2013 Glenn Randers-Pehrson |
Glenn Randers-Pehrson | d436672 | 2000-06-04 14:29:29 -0500 | [diff] [blame] | 6 | * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) |
| 7 | * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) |
Glenn Randers-Pehrson | b6ce43d | 1998-01-01 07:13:13 -0600 | [diff] [blame] | 8 | * |
Glenn Randers-Pehrson | bfbf865 | 2009-06-26 21:46:52 -0500 | [diff] [blame] | 9 | * This code is released under the libpng license. |
Glenn Randers-Pehrson | c332bbc | 2009-06-25 13:43:50 -0500 | [diff] [blame] | 10 | * For conditions of distribution and use, see the disclaimer |
Glenn Randers-Pehrson | 037023b | 2009-06-24 10:27:36 -0500 | [diff] [blame] | 11 | * and license in png.h |
Glenn Randers-Pehrson | 3e61d79 | 2009-06-24 09:31:28 -0500 | [diff] [blame] | 12 | * |
Glenn Randers-Pehrson | b6ce43d | 1998-01-01 07:13:13 -0600 | [diff] [blame] | 13 | * The functions here are used during reads to store data from the file |
| 14 | * into the info struct, and during writes to store application data |
| 15 | * into the info struct for writing into the file. This abstracts the |
| 16 | * info struct and allows us to change the structure in the future. |
| 17 | */ |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 18 | |
Glenn Randers-Pehrson | 145f5c8 | 2008-07-10 09:13:13 -0500 | [diff] [blame] | 19 | #include "pngpriv.h" |
Glenn Randers-Pehrson | 9c3ab68 | 2006-02-20 22:09:05 -0600 | [diff] [blame] | 20 | |
Glenn Randers-Pehrson | c3cd22b | 2010-03-08 21:10:25 -0600 | [diff] [blame] | 21 | #if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) |
| 22 | |
Glenn Randers-Pehrson | e26c095 | 2009-09-23 11:22:08 -0500 | [diff] [blame] | 23 | #ifdef PNG_bKGD_SUPPORTED |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 24 | void PNGAPI |
John Bowler | 4f67e40 | 2011-12-28 08:43:37 -0600 | [diff] [blame] | 25 | png_set_bKGD(png_const_structrp png_ptr, png_inforp info_ptr, |
Glenn Randers-Pehrson | e600c51 | 2010-08-18 07:25:46 -0500 | [diff] [blame] | 26 | png_const_color_16p background) |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 27 | { |
Glenn Randers-Pehrson | 51650b8 | 2008-08-05 07:44:42 -0500 | [diff] [blame] | 28 | png_debug1(1, "in %s storage function", "bKGD"); |
Glenn Randers-Pehrson | da00980 | 2009-08-15 13:25:47 -0500 | [diff] [blame] | 29 | |
John Bowler | fcd301d | 2011-12-28 21:34:27 -0600 | [diff] [blame] | 30 | if (png_ptr == NULL || info_ptr == NULL || background == NULL) |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 31 | return; |
| 32 | |
John Bowler | fcd301d | 2011-12-28 21:34:27 -0600 | [diff] [blame] | 33 | info_ptr->background = *background; |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 34 | info_ptr->valid |= PNG_INFO_bKGD; |
| 35 | } |
| 36 | #endif |
| 37 | |
Glenn Randers-Pehrson | e26c095 | 2009-09-23 11:22:08 -0500 | [diff] [blame] | 38 | #ifdef PNG_cHRM_SUPPORTED |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 39 | void PNGFAPI |
John Bowler | 4f67e40 | 2011-12-28 08:43:37 -0600 | [diff] [blame] | 40 | png_set_cHRM_fixed(png_const_structrp png_ptr, png_inforp info_ptr, |
Glenn Randers-Pehrson | da30135 | 2010-03-06 06:42:48 -0600 | [diff] [blame] | 41 | png_fixed_point white_x, png_fixed_point white_y, png_fixed_point red_x, |
| 42 | png_fixed_point red_y, png_fixed_point green_x, png_fixed_point green_y, |
| 43 | png_fixed_point blue_x, png_fixed_point blue_y) |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 44 | { |
John Bowler | b11b31a | 2012-03-21 07:55:46 -0500 | [diff] [blame] | 45 | png_xy xy; |
| 46 | |
Glenn Randers-Pehrson | d6d8075 | 2008-12-02 09:49:43 -0600 | [diff] [blame] | 47 | png_debug1(1, "in %s storage function", "cHRM fixed"); |
Glenn Randers-Pehrson | da00980 | 2009-08-15 13:25:47 -0500 | [diff] [blame] | 48 | |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 49 | if (png_ptr == NULL || info_ptr == NULL) |
| 50 | return; |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 51 | |
John Bowler | b11b31a | 2012-03-21 07:55:46 -0500 | [diff] [blame] | 52 | xy.redx = red_x; |
| 53 | xy.redy = red_y; |
| 54 | xy.greenx = green_x; |
| 55 | xy.greeny = green_y; |
| 56 | xy.bluex = blue_x; |
| 57 | xy.bluey = blue_y; |
| 58 | xy.whitex = white_x; |
| 59 | xy.whitey = white_y; |
| 60 | |
| 61 | if (png_colorspace_set_chromaticities(png_ptr, &info_ptr->colorspace, &xy, |
| 62 | 2/* override with app values*/)) |
| 63 | info_ptr->colorspace.flags |= PNG_COLORSPACE_FROM_cHRM; |
| 64 | |
| 65 | png_colorspace_sync_info(png_ptr, info_ptr); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 66 | } |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 67 | |
John Bowler | 736f40f | 2011-08-25 16:19:44 -0500 | [diff] [blame] | 68 | void PNGFAPI |
John Bowler | 4f67e40 | 2011-12-28 08:43:37 -0600 | [diff] [blame] | 69 | png_set_cHRM_XYZ_fixed(png_const_structrp png_ptr, png_inforp info_ptr, |
John Bowler | 736f40f | 2011-08-25 16:19:44 -0500 | [diff] [blame] | 70 | png_fixed_point int_red_X, png_fixed_point int_red_Y, |
| 71 | png_fixed_point int_red_Z, png_fixed_point int_green_X, |
| 72 | png_fixed_point int_green_Y, png_fixed_point int_green_Z, |
| 73 | png_fixed_point int_blue_X, png_fixed_point int_blue_Y, |
| 74 | png_fixed_point int_blue_Z) |
| 75 | { |
| 76 | png_XYZ XYZ; |
John Bowler | 736f40f | 2011-08-25 16:19:44 -0500 | [diff] [blame] | 77 | |
| 78 | png_debug1(1, "in %s storage function", "cHRM XYZ fixed"); |
| 79 | |
| 80 | if (png_ptr == NULL || info_ptr == NULL) |
| 81 | return; |
| 82 | |
Glenn Randers-Pehrson | 702053d | 2012-08-17 21:23:06 -0500 | [diff] [blame] | 83 | XYZ.red_X = int_red_X; |
| 84 | XYZ.red_Y = int_red_Y; |
| 85 | XYZ.red_Z = int_red_Z; |
| 86 | XYZ.green_X = int_green_X; |
| 87 | XYZ.green_Y = int_green_Y; |
| 88 | XYZ.green_Z = int_green_Z; |
| 89 | XYZ.blue_X = int_blue_X; |
| 90 | XYZ.blue_Y = int_blue_Y; |
| 91 | XYZ.blue_Z = int_blue_Z; |
John Bowler | 736f40f | 2011-08-25 16:19:44 -0500 | [diff] [blame] | 92 | |
John Bowler | b11b31a | 2012-03-21 07:55:46 -0500 | [diff] [blame] | 93 | if (png_colorspace_set_endpoints(png_ptr, &info_ptr->colorspace, &XYZ, 2)) |
| 94 | info_ptr->colorspace.flags |= PNG_COLORSPACE_FROM_cHRM; |
John Bowler | 736f40f | 2011-08-25 16:19:44 -0500 | [diff] [blame] | 95 | |
John Bowler | b11b31a | 2012-03-21 07:55:46 -0500 | [diff] [blame] | 96 | png_colorspace_sync_info(png_ptr, info_ptr); |
John Bowler | 736f40f | 2011-08-25 16:19:44 -0500 | [diff] [blame] | 97 | } |
| 98 | |
Glenn Randers-Pehrson | 62333ba | 2010-10-23 08:48:51 -0500 | [diff] [blame] | 99 | # ifdef PNG_FLOATING_POINT_SUPPORTED |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 100 | void PNGAPI |
John Bowler | 4f67e40 | 2011-12-28 08:43:37 -0600 | [diff] [blame] | 101 | png_set_cHRM(png_const_structrp png_ptr, png_inforp info_ptr, |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 102 | double white_x, double white_y, double red_x, double red_y, |
| 103 | double green_x, double green_y, double blue_x, double blue_y) |
| 104 | { |
| 105 | png_set_cHRM_fixed(png_ptr, info_ptr, |
| 106 | png_fixed(png_ptr, white_x, "cHRM White X"), |
| 107 | png_fixed(png_ptr, white_y, "cHRM White Y"), |
| 108 | png_fixed(png_ptr, red_x, "cHRM Red X"), |
| 109 | png_fixed(png_ptr, red_y, "cHRM Red Y"), |
| 110 | png_fixed(png_ptr, green_x, "cHRM Green X"), |
| 111 | png_fixed(png_ptr, green_y, "cHRM Green Y"), |
| 112 | png_fixed(png_ptr, blue_x, "cHRM Blue X"), |
| 113 | png_fixed(png_ptr, blue_y, "cHRM Blue Y")); |
| 114 | } |
John Bowler | 736f40f | 2011-08-25 16:19:44 -0500 | [diff] [blame] | 115 | |
| 116 | void PNGAPI |
John Bowler | 4f67e40 | 2011-12-28 08:43:37 -0600 | [diff] [blame] | 117 | png_set_cHRM_XYZ(png_const_structrp png_ptr, png_inforp info_ptr, double red_X, |
John Bowler | 736f40f | 2011-08-25 16:19:44 -0500 | [diff] [blame] | 118 | double red_Y, double red_Z, double green_X, double green_Y, double green_Z, |
| 119 | double blue_X, double blue_Y, double blue_Z) |
| 120 | { |
| 121 | png_set_cHRM_XYZ_fixed(png_ptr, info_ptr, |
| 122 | png_fixed(png_ptr, red_X, "cHRM Red X"), |
| 123 | png_fixed(png_ptr, red_Y, "cHRM Red Y"), |
| 124 | png_fixed(png_ptr, red_Z, "cHRM Red Z"), |
| 125 | png_fixed(png_ptr, green_X, "cHRM Red X"), |
| 126 | png_fixed(png_ptr, green_Y, "cHRM Red Y"), |
| 127 | png_fixed(png_ptr, green_Z, "cHRM Red Z"), |
| 128 | png_fixed(png_ptr, blue_X, "cHRM Red X"), |
| 129 | png_fixed(png_ptr, blue_Y, "cHRM Red Y"), |
| 130 | png_fixed(png_ptr, blue_Z, "cHRM Red Z")); |
| 131 | } |
Glenn Randers-Pehrson | 62333ba | 2010-10-23 08:48:51 -0500 | [diff] [blame] | 132 | # endif /* PNG_FLOATING_POINT_SUPPORTED */ |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 133 | |
Glenn Randers-Pehrson | f783101 | 2008-11-13 06:05:13 -0600 | [diff] [blame] | 134 | #endif /* PNG_cHRM_SUPPORTED */ |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 135 | |
Glenn Randers-Pehrson | e26c095 | 2009-09-23 11:22:08 -0500 | [diff] [blame] | 136 | #ifdef PNG_gAMA_SUPPORTED |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 137 | void PNGFAPI |
John Bowler | 4f67e40 | 2011-12-28 08:43:37 -0600 | [diff] [blame] | 138 | png_set_gAMA_fixed(png_const_structrp png_ptr, png_inforp info_ptr, |
| 139 | png_fixed_point file_gamma) |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 140 | { |
| 141 | png_debug1(1, "in %s storage function", "gAMA"); |
| 142 | |
| 143 | if (png_ptr == NULL || info_ptr == NULL) |
| 144 | return; |
| 145 | |
John Bowler | f8dfd12 | 2012-10-25 19:30:02 -0500 | [diff] [blame] | 146 | png_colorspace_set_gamma(png_ptr, &info_ptr->colorspace, file_gamma); |
| 147 | png_colorspace_sync_info(png_ptr, info_ptr); |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 148 | } |
| 149 | |
Glenn Randers-Pehrson | 62333ba | 2010-10-23 08:48:51 -0500 | [diff] [blame] | 150 | # ifdef PNG_FLOATING_POINT_SUPPORTED |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 151 | void PNGAPI |
John Bowler | 4f67e40 | 2011-12-28 08:43:37 -0600 | [diff] [blame] | 152 | png_set_gAMA(png_const_structrp png_ptr, png_inforp info_ptr, double file_gamma) |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 153 | { |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 154 | png_set_gAMA_fixed(png_ptr, info_ptr, png_fixed(png_ptr, file_gamma, |
Glenn Randers-Pehrson | 62333ba | 2010-10-23 08:48:51 -0500 | [diff] [blame] | 155 | "png_set_gAMA")); |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 156 | } |
Glenn Randers-Pehrson | 62333ba | 2010-10-23 08:48:51 -0500 | [diff] [blame] | 157 | # endif |
Glenn Randers-Pehrson | a272d8f | 2010-06-25 21:45:31 -0500 | [diff] [blame] | 158 | #endif |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 159 | |
Glenn Randers-Pehrson | e26c095 | 2009-09-23 11:22:08 -0500 | [diff] [blame] | 160 | #ifdef PNG_hIST_SUPPORTED |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 161 | void PNGAPI |
John Bowler | 4f67e40 | 2011-12-28 08:43:37 -0600 | [diff] [blame] | 162 | png_set_hIST(png_const_structrp png_ptr, png_inforp info_ptr, |
| 163 | png_const_uint_16p hist) |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 164 | { |
Glenn Randers-Pehrson | d1e8c86 | 2002-06-20 06:54:34 -0500 | [diff] [blame] | 165 | int i; |
Glenn Randers-Pehrson | 76e5fd6 | 2000-12-28 07:50:05 -0600 | [diff] [blame] | 166 | |
Glenn Randers-Pehrson | 51650b8 | 2008-08-05 07:44:42 -0500 | [diff] [blame] | 167 | png_debug1(1, "in %s storage function", "hIST"); |
Glenn Randers-Pehrson | da00980 | 2009-08-15 13:25:47 -0500 | [diff] [blame] | 168 | |
Glenn Randers-Pehrson | a357b99 | 1998-02-08 20:56:40 -0600 | [diff] [blame] | 169 | if (png_ptr == NULL || info_ptr == NULL) |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 170 | return; |
Glenn Randers-Pehrson | b3ce365 | 2009-08-15 21:47:03 -0500 | [diff] [blame] | 171 | |
Glenn Randers-Pehrson | 145f5c8 | 2008-07-10 09:13:13 -0500 | [diff] [blame] | 172 | if (info_ptr->num_palette == 0 || info_ptr->num_palette |
Glenn Randers-Pehrson | 9c3ab68 | 2006-02-20 22:09:05 -0600 | [diff] [blame] | 173 | > PNG_MAX_PALETTE_LENGTH) |
Glenn Randers-Pehrson | 3097f61 | 2001-05-07 14:52:45 -0500 | [diff] [blame] | 174 | { |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 175 | png_warning(png_ptr, |
Glenn Randers-Pehrson | da30135 | 2010-03-06 06:42:48 -0600 | [diff] [blame] | 176 | "Invalid palette size, hIST allocation skipped"); |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 177 | |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 178 | return; |
Glenn Randers-Pehrson | 3097f61 | 2001-05-07 14:52:45 -0500 | [diff] [blame] | 179 | } |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 180 | |
Glenn Randers-Pehrson | 76e5fd6 | 2000-12-28 07:50:05 -0600 | [diff] [blame] | 181 | png_free_data(png_ptr, info_ptr, PNG_FREE_HIST, 0); |
Glenn Randers-Pehrson | 62333ba | 2010-10-23 08:48:51 -0500 | [diff] [blame] | 182 | |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 183 | /* Changed from info->num_palette to PNG_MAX_PALETTE_LENGTH in |
| 184 | * version 1.2.1 |
| 185 | */ |
John Bowler | 4f67e40 | 2011-12-28 08:43:37 -0600 | [diff] [blame] | 186 | info_ptr->hist = png_voidcast(png_uint_16p, png_malloc_warn(png_ptr, |
Glenn Randers-Pehrson | 432c174 | 2012-08-09 20:14:48 -0500 | [diff] [blame] | 187 | PNG_MAX_PALETTE_LENGTH * (sizeof (png_uint_16)))); |
Glenn Randers-Pehrson | 62333ba | 2010-10-23 08:48:51 -0500 | [diff] [blame] | 188 | |
John Bowler | 4f67e40 | 2011-12-28 08:43:37 -0600 | [diff] [blame] | 189 | if (info_ptr->hist == NULL) |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 190 | { |
| 191 | png_warning(png_ptr, "Insufficient memory for hIST chunk data"); |
| 192 | return; |
| 193 | } |
Glenn Randers-Pehrson | 76e5fd6 | 2000-12-28 07:50:05 -0600 | [diff] [blame] | 194 | |
Glenn Randers-Pehrson | 76e5fd6 | 2000-12-28 07:50:05 -0600 | [diff] [blame] | 195 | info_ptr->free_me |= PNG_FREE_HIST; |
John Bowler | 4f67e40 | 2011-12-28 08:43:37 -0600 | [diff] [blame] | 196 | |
| 197 | for (i = 0; i < info_ptr->num_palette; i++) |
| 198 | info_ptr->hist[i] = hist[i]; |
| 199 | |
| 200 | info_ptr->valid |= PNG_INFO_hIST; |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 201 | } |
| 202 | #endif |
| 203 | |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 204 | void PNGAPI |
John Bowler | 4f67e40 | 2011-12-28 08:43:37 -0600 | [diff] [blame] | 205 | png_set_IHDR(png_const_structrp png_ptr, png_inforp info_ptr, |
Glenn Randers-Pehrson | 62333ba | 2010-10-23 08:48:51 -0500 | [diff] [blame] | 206 | png_uint_32 width, png_uint_32 height, int bit_depth, |
| 207 | int color_type, int interlace_type, int compression_type, |
| 208 | int filter_type) |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 209 | { |
Glenn Randers-Pehrson | 51650b8 | 2008-08-05 07:44:42 -0500 | [diff] [blame] | 210 | png_debug1(1, "in %s storage function", "IHDR"); |
Glenn Randers-Pehrson | da00980 | 2009-08-15 13:25:47 -0500 | [diff] [blame] | 211 | |
Glenn Randers-Pehrson | a357b99 | 1998-02-08 20:56:40 -0600 | [diff] [blame] | 212 | if (png_ptr == NULL || info_ptr == NULL) |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 213 | return; |
| 214 | |
| 215 | info_ptr->width = width; |
| 216 | info_ptr->height = height; |
| 217 | info_ptr->bit_depth = (png_byte)bit_depth; |
Glenn Randers-Pehrson | b35a745 | 2009-09-30 23:12:13 -0500 | [diff] [blame] | 218 | info_ptr->color_type = (png_byte)color_type; |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 219 | info_ptr->compression_type = (png_byte)compression_type; |
| 220 | info_ptr->filter_type = (png_byte)filter_type; |
| 221 | info_ptr->interlace_type = (png_byte)interlace_type; |
Glenn Randers-Pehrson | b35a745 | 2009-09-30 23:12:13 -0500 | [diff] [blame] | 222 | |
| 223 | png_check_IHDR (png_ptr, info_ptr->width, info_ptr->height, |
| 224 | info_ptr->bit_depth, info_ptr->color_type, info_ptr->interlace_type, |
| 225 | info_ptr->compression_type, info_ptr->filter_type); |
| 226 | |
Glenn Randers-Pehrson | 25d8224 | 2002-05-01 11:51:26 -0500 | [diff] [blame] | 227 | if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE) |
| 228 | info_ptr->channels = 1; |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 229 | |
Glenn Randers-Pehrson | 25d8224 | 2002-05-01 11:51:26 -0500 | [diff] [blame] | 230 | else if (info_ptr->color_type & PNG_COLOR_MASK_COLOR) |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 231 | info_ptr->channels = 3; |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 232 | |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 233 | else |
| 234 | info_ptr->channels = 1; |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 235 | |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 236 | if (info_ptr->color_type & PNG_COLOR_MASK_ALPHA) |
| 237 | info_ptr->channels++; |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 238 | |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 239 | info_ptr->pixel_depth = (png_byte)(info_ptr->channels * info_ptr->bit_depth); |
Glenn Randers-Pehrson | 0f881d6 | 1998-02-07 10:20:57 -0600 | [diff] [blame] | 240 | |
Glenn Randers-Pehrson | 4bb4d01 | 2009-05-20 12:45:29 -0500 | [diff] [blame] | 241 | /* Check for potential overflow */ |
Glenn Randers-Pehrson | 62333ba | 2010-10-23 08:48:51 -0500 | [diff] [blame] | 242 | if (width > |
| 243 | (PNG_UINT_32_MAX >> 3) /* 8-byte RRGGBBAA pixels */ |
| 244 | - 48 /* bigrowbuf hack */ |
| 245 | - 1 /* filter byte */ |
| 246 | - 7*8 /* rounding of width to multiple of 8 pixels */ |
| 247 | - 8) /* extra max_pixel_depth pad */ |
Glenn Randers-Pehrson | beb572e | 2006-08-19 13:59:24 -0500 | [diff] [blame] | 248 | info_ptr->rowbytes = 0; |
Glenn Randers-Pehrson | 896239b | 1998-04-21 15:03:57 -0500 | [diff] [blame] | 249 | else |
Glenn Randers-Pehrson | 145f5c8 | 2008-07-10 09:13:13 -0500 | [diff] [blame] | 250 | info_ptr->rowbytes = PNG_ROWBYTES(info_ptr->pixel_depth, width); |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 251 | } |
| 252 | |
Glenn Randers-Pehrson | e26c095 | 2009-09-23 11:22:08 -0500 | [diff] [blame] | 253 | #ifdef PNG_oFFs_SUPPORTED |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 254 | void PNGAPI |
John Bowler | 4f67e40 | 2011-12-28 08:43:37 -0600 | [diff] [blame] | 255 | png_set_oFFs(png_const_structrp png_ptr, png_inforp info_ptr, |
Glenn Randers-Pehrson | da30135 | 2010-03-06 06:42:48 -0600 | [diff] [blame] | 256 | png_int_32 offset_x, png_int_32 offset_y, int unit_type) |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 257 | { |
Glenn Randers-Pehrson | 51650b8 | 2008-08-05 07:44:42 -0500 | [diff] [blame] | 258 | png_debug1(1, "in %s storage function", "oFFs"); |
Glenn Randers-Pehrson | da00980 | 2009-08-15 13:25:47 -0500 | [diff] [blame] | 259 | |
Glenn Randers-Pehrson | a357b99 | 1998-02-08 20:56:40 -0600 | [diff] [blame] | 260 | if (png_ptr == NULL || info_ptr == NULL) |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 261 | return; |
| 262 | |
| 263 | info_ptr->x_offset = offset_x; |
| 264 | info_ptr->y_offset = offset_y; |
| 265 | info_ptr->offset_unit_type = (png_byte)unit_type; |
| 266 | info_ptr->valid |= PNG_INFO_oFFs; |
| 267 | } |
| 268 | #endif |
| 269 | |
Glenn Randers-Pehrson | e26c095 | 2009-09-23 11:22:08 -0500 | [diff] [blame] | 270 | #ifdef PNG_pCAL_SUPPORTED |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 271 | void PNGAPI |
John Bowler | 4f67e40 | 2011-12-28 08:43:37 -0600 | [diff] [blame] | 272 | png_set_pCAL(png_const_structrp png_ptr, png_inforp info_ptr, |
Glenn Randers-Pehrson | e600c51 | 2010-08-18 07:25:46 -0500 | [diff] [blame] | 273 | png_const_charp purpose, png_int_32 X0, png_int_32 X1, int type, |
| 274 | int nparams, png_const_charp units, png_charpp params) |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 275 | { |
Glenn Randers-Pehrson | beb572e | 2006-08-19 13:59:24 -0500 | [diff] [blame] | 276 | png_size_t length; |
Glenn Randers-Pehrson | a357b99 | 1998-02-08 20:56:40 -0600 | [diff] [blame] | 277 | int i; |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 278 | |
Glenn Randers-Pehrson | 51650b8 | 2008-08-05 07:44:42 -0500 | [diff] [blame] | 279 | png_debug1(1, "in %s storage function", "pCAL"); |
Glenn Randers-Pehrson | da00980 | 2009-08-15 13:25:47 -0500 | [diff] [blame] | 280 | |
John Bowler | fcd301d | 2011-12-28 21:34:27 -0600 | [diff] [blame] | 281 | if (png_ptr == NULL || info_ptr == NULL || purpose == NULL || units == NULL |
| 282 | || (nparams > 0 && params == NULL)) |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 283 | return; |
| 284 | |
Glenn Randers-Pehrson | ece07cf | 2012-08-10 18:08:02 -0500 | [diff] [blame] | 285 | length = strlen(purpose) + 1; |
Glenn Randers-Pehrson | 51650b8 | 2008-08-05 07:44:42 -0500 | [diff] [blame] | 286 | png_debug1(3, "allocating purpose for info (%lu bytes)", |
Glenn Randers-Pehrson | da30135 | 2010-03-06 06:42:48 -0600 | [diff] [blame] | 287 | (unsigned long)length); |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 288 | |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 289 | /* TODO: validate format of calibration name and unit name */ |
| 290 | |
| 291 | /* Check that the type matches the specification. */ |
| 292 | if (type < 0 || type > 3) |
| 293 | png_error(png_ptr, "Invalid pCAL equation type"); |
| 294 | |
John Bowler | fcd301d | 2011-12-28 21:34:27 -0600 | [diff] [blame] | 295 | if (nparams < 0 || nparams > 255) |
| 296 | png_error(png_ptr, "Invalid pCAL parameter count"); |
| 297 | |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 298 | /* Validate params[nparams] */ |
| 299 | for (i=0; i<nparams; ++i) |
John Bowler | fcd301d | 2011-12-28 21:34:27 -0600 | [diff] [blame] | 300 | if (params[i] == NULL || |
Glenn Randers-Pehrson | ece07cf | 2012-08-10 18:08:02 -0500 | [diff] [blame] | 301 | !png_check_fp_string(params[i], strlen(params[i]))) |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 302 | png_error(png_ptr, "Invalid format for pCAL parameter"); |
| 303 | |
John Bowler | fcd301d | 2011-12-28 21:34:27 -0600 | [diff] [blame] | 304 | info_ptr->pcal_purpose = png_voidcast(png_charp, |
| 305 | png_malloc_warn(png_ptr, length)); |
Glenn Randers-Pehrson | 62333ba | 2010-10-23 08:48:51 -0500 | [diff] [blame] | 306 | |
Glenn Randers-Pehrson | 07748d1 | 2002-05-25 11:12:10 -0500 | [diff] [blame] | 307 | if (info_ptr->pcal_purpose == NULL) |
Glenn Randers-Pehrson | beb572e | 2006-08-19 13:59:24 -0500 | [diff] [blame] | 308 | { |
Glenn Randers-Pehrson | 83fb855 | 2009-06-16 17:52:23 -0500 | [diff] [blame] | 309 | png_warning(png_ptr, "Insufficient memory for pCAL purpose"); |
Glenn Randers-Pehrson | beb572e | 2006-08-19 13:59:24 -0500 | [diff] [blame] | 310 | return; |
| 311 | } |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 312 | |
Glenn Randers-Pehrson | dbb7e19 | 2012-08-10 17:27:42 -0500 | [diff] [blame] | 313 | memcpy(info_ptr->pcal_purpose, purpose, length); |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 314 | |
Glenn Randers-Pehrson | 51650b8 | 2008-08-05 07:44:42 -0500 | [diff] [blame] | 315 | png_debug(3, "storing X0, X1, type, and nparams in info"); |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 316 | info_ptr->pcal_X0 = X0; |
| 317 | info_ptr->pcal_X1 = X1; |
| 318 | info_ptr->pcal_type = (png_byte)type; |
| 319 | info_ptr->pcal_nparams = (png_byte)nparams; |
| 320 | |
Glenn Randers-Pehrson | ece07cf | 2012-08-10 18:08:02 -0500 | [diff] [blame] | 321 | length = strlen(units) + 1; |
Glenn Randers-Pehrson | 51650b8 | 2008-08-05 07:44:42 -0500 | [diff] [blame] | 322 | png_debug1(3, "allocating units for info (%lu bytes)", |
Glenn Randers-Pehrson | 6bc53be | 2006-06-16 07:52:03 -0500 | [diff] [blame] | 323 | (unsigned long)length); |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 324 | |
John Bowler | fcd301d | 2011-12-28 21:34:27 -0600 | [diff] [blame] | 325 | info_ptr->pcal_units = png_voidcast(png_charp, |
| 326 | png_malloc_warn(png_ptr, length)); |
Glenn Randers-Pehrson | 62333ba | 2010-10-23 08:48:51 -0500 | [diff] [blame] | 327 | |
Glenn Randers-Pehrson | 07748d1 | 2002-05-25 11:12:10 -0500 | [diff] [blame] | 328 | if (info_ptr->pcal_units == NULL) |
Glenn Randers-Pehrson | beb572e | 2006-08-19 13:59:24 -0500 | [diff] [blame] | 329 | { |
Glenn Randers-Pehrson | 83fb855 | 2009-06-16 17:52:23 -0500 | [diff] [blame] | 330 | png_warning(png_ptr, "Insufficient memory for pCAL units"); |
Glenn Randers-Pehrson | beb572e | 2006-08-19 13:59:24 -0500 | [diff] [blame] | 331 | return; |
| 332 | } |
Glenn Randers-Pehrson | 62333ba | 2010-10-23 08:48:51 -0500 | [diff] [blame] | 333 | |
Glenn Randers-Pehrson | dbb7e19 | 2012-08-10 17:27:42 -0500 | [diff] [blame] | 334 | memcpy(info_ptr->pcal_units, units, length); |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 335 | |
John Bowler | fcd301d | 2011-12-28 21:34:27 -0600 | [diff] [blame] | 336 | info_ptr->pcal_params = png_voidcast(png_charpp, png_malloc_warn(png_ptr, |
Glenn Randers-Pehrson | 432c174 | 2012-08-09 20:14:48 -0500 | [diff] [blame] | 337 | (png_size_t)((nparams + 1) * (sizeof (png_charp))))); |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 338 | |
Glenn Randers-Pehrson | 07748d1 | 2002-05-25 11:12:10 -0500 | [diff] [blame] | 339 | if (info_ptr->pcal_params == NULL) |
Glenn Randers-Pehrson | beb572e | 2006-08-19 13:59:24 -0500 | [diff] [blame] | 340 | { |
Glenn Randers-Pehrson | 83fb855 | 2009-06-16 17:52:23 -0500 | [diff] [blame] | 341 | png_warning(png_ptr, "Insufficient memory for pCAL params"); |
Glenn Randers-Pehrson | beb572e | 2006-08-19 13:59:24 -0500 | [diff] [blame] | 342 | return; |
| 343 | } |
Glenn Randers-Pehrson | 3097f61 | 2001-05-07 14:52:45 -0500 | [diff] [blame] | 344 | |
Glenn Randers-Pehrson | dbb7e19 | 2012-08-10 17:27:42 -0500 | [diff] [blame] | 345 | memset(info_ptr->pcal_params, 0, (nparams + 1) * (sizeof (png_charp))); |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 346 | |
| 347 | for (i = 0; i < nparams; i++) |
| 348 | { |
Glenn Randers-Pehrson | ece07cf | 2012-08-10 18:08:02 -0500 | [diff] [blame] | 349 | length = strlen(params[i]) + 1; |
Glenn Randers-Pehrson | 51650b8 | 2008-08-05 07:44:42 -0500 | [diff] [blame] | 350 | png_debug2(3, "allocating parameter %d for info (%lu bytes)", i, |
Glenn Randers-Pehrson | 62333ba | 2010-10-23 08:48:51 -0500 | [diff] [blame] | 351 | (unsigned long)length); |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 352 | |
Glenn Randers-Pehrson | 07748d1 | 2002-05-25 11:12:10 -0500 | [diff] [blame] | 353 | info_ptr->pcal_params[i] = (png_charp)png_malloc_warn(png_ptr, length); |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 354 | |
Glenn Randers-Pehrson | 07748d1 | 2002-05-25 11:12:10 -0500 | [diff] [blame] | 355 | if (info_ptr->pcal_params[i] == NULL) |
Glenn Randers-Pehrson | beb572e | 2006-08-19 13:59:24 -0500 | [diff] [blame] | 356 | { |
Glenn Randers-Pehrson | 83fb855 | 2009-06-16 17:52:23 -0500 | [diff] [blame] | 357 | png_warning(png_ptr, "Insufficient memory for pCAL parameter"); |
| 358 | return; |
Glenn Randers-Pehrson | beb572e | 2006-08-19 13:59:24 -0500 | [diff] [blame] | 359 | } |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 360 | |
Glenn Randers-Pehrson | dbb7e19 | 2012-08-10 17:27:42 -0500 | [diff] [blame] | 361 | memcpy(info_ptr->pcal_params[i], params[i], length); |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 362 | } |
| 363 | |
| 364 | info_ptr->valid |= PNG_INFO_pCAL; |
Glenn Randers-Pehrson | 1ef65b6 | 2000-05-12 06:19:53 -0500 | [diff] [blame] | 365 | info_ptr->free_me |= PNG_FREE_PCAL; |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 366 | } |
| 367 | #endif |
| 368 | |
Glenn Randers-Pehrson | a272d8f | 2010-06-25 21:45:31 -0500 | [diff] [blame] | 369 | #ifdef PNG_sCAL_SUPPORTED |
Glenn Randers-Pehrson | 4009a76 | 2010-07-31 06:34:36 -0500 | [diff] [blame] | 370 | void PNGAPI |
John Bowler | 4f67e40 | 2011-12-28 08:43:37 -0600 | [diff] [blame] | 371 | png_set_sCAL_s(png_const_structrp png_ptr, png_inforp info_ptr, |
Glenn Randers-Pehrson | e600c51 | 2010-08-18 07:25:46 -0500 | [diff] [blame] | 372 | int unit, png_const_charp swidth, png_const_charp sheight) |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 373 | { |
Glenn Randers-Pehrson | 4009a76 | 2010-07-31 06:34:36 -0500 | [diff] [blame] | 374 | png_size_t lengthw = 0, lengthh = 0; |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 375 | |
Glenn Randers-Pehrson | 51650b8 | 2008-08-05 07:44:42 -0500 | [diff] [blame] | 376 | png_debug1(1, "in %s storage function", "sCAL"); |
Glenn Randers-Pehrson | da00980 | 2009-08-15 13:25:47 -0500 | [diff] [blame] | 377 | |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 378 | if (png_ptr == NULL || info_ptr == NULL) |
| 379 | return; |
| 380 | |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 381 | /* Double check the unit (should never get here with an invalid |
| 382 | * unit unless this is an API call.) |
| 383 | */ |
| 384 | if (unit != 1 && unit != 2) |
| 385 | png_error(png_ptr, "Invalid sCAL unit"); |
| 386 | |
Glenn Randers-Pehrson | ece07cf | 2012-08-10 18:08:02 -0500 | [diff] [blame] | 387 | if (swidth == NULL || (lengthw = strlen(swidth)) == 0 || |
Glenn Randers-Pehrson | b75b241 | 2011-04-16 19:35:05 -0500 | [diff] [blame] | 388 | swidth[0] == 45 /* '-' */ || !png_check_fp_string(swidth, lengthw)) |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 389 | png_error(png_ptr, "Invalid sCAL width"); |
| 390 | |
Glenn Randers-Pehrson | ece07cf | 2012-08-10 18:08:02 -0500 | [diff] [blame] | 391 | if (sheight == NULL || (lengthh = strlen(sheight)) == 0 || |
Glenn Randers-Pehrson | b75b241 | 2011-04-16 19:35:05 -0500 | [diff] [blame] | 392 | sheight[0] == 45 /* '-' */ || !png_check_fp_string(sheight, lengthh)) |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 393 | png_error(png_ptr, "Invalid sCAL height"); |
| 394 | |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 395 | info_ptr->scal_unit = (png_byte)unit; |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 396 | |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 397 | ++lengthw; |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 398 | |
Glenn Randers-Pehrson | b764c60 | 2011-01-14 21:18:37 -0600 | [diff] [blame] | 399 | png_debug1(3, "allocating unit for info (%u bytes)", (unsigned int)lengthw); |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 400 | |
John Bowler | fcd301d | 2011-12-28 21:34:27 -0600 | [diff] [blame] | 401 | info_ptr->scal_s_width = png_voidcast(png_charp, |
| 402 | png_malloc_warn(png_ptr, lengthw)); |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 403 | |
Glenn Randers-Pehrson | 5fea36f | 2004-07-28 08:20:44 -0500 | [diff] [blame] | 404 | if (info_ptr->scal_s_width == NULL) |
| 405 | { |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 406 | png_warning(png_ptr, "Memory allocation failed while processing sCAL"); |
Glenn Randers-Pehrson | 145f5c8 | 2008-07-10 09:13:13 -0500 | [diff] [blame] | 407 | return; |
Glenn Randers-Pehrson | 5fea36f | 2004-07-28 08:20:44 -0500 | [diff] [blame] | 408 | } |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 409 | |
Glenn Randers-Pehrson | dbb7e19 | 2012-08-10 17:27:42 -0500 | [diff] [blame] | 410 | memcpy(info_ptr->scal_s_width, swidth, lengthw); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 411 | |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 412 | ++lengthh; |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 413 | |
Glenn Randers-Pehrson | b764c60 | 2011-01-14 21:18:37 -0600 | [diff] [blame] | 414 | png_debug1(3, "allocating unit for info (%u bytes)", (unsigned int)lengthh); |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 415 | |
John Bowler | fcd301d | 2011-12-28 21:34:27 -0600 | [diff] [blame] | 416 | info_ptr->scal_s_height = png_voidcast(png_charp, |
| 417 | png_malloc_warn(png_ptr, lengthh)); |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 418 | |
Glenn Randers-Pehrson | 5fea36f | 2004-07-28 08:20:44 -0500 | [diff] [blame] | 419 | if (info_ptr->scal_s_height == NULL) |
| 420 | { |
| 421 | png_free (png_ptr, info_ptr->scal_s_width); |
Glenn Randers-Pehrson | 895a9c9 | 2008-07-25 08:51:18 -0500 | [diff] [blame] | 422 | info_ptr->scal_s_width = NULL; |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 423 | |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 424 | png_warning(png_ptr, "Memory allocation failed while processing sCAL"); |
Glenn Randers-Pehrson | 145f5c8 | 2008-07-10 09:13:13 -0500 | [diff] [blame] | 425 | return; |
Glenn Randers-Pehrson | 5fea36f | 2004-07-28 08:20:44 -0500 | [diff] [blame] | 426 | } |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 427 | |
Glenn Randers-Pehrson | dbb7e19 | 2012-08-10 17:27:42 -0500 | [diff] [blame] | 428 | memcpy(info_ptr->scal_s_height, sheight, lengthh); |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 429 | |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 430 | info_ptr->valid |= PNG_INFO_sCAL; |
Glenn Randers-Pehrson | 1ef65b6 | 2000-05-12 06:19:53 -0500 | [diff] [blame] | 431 | info_ptr->free_me |= PNG_FREE_SCAL; |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 432 | } |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 433 | |
Glenn Randers-Pehrson | 62333ba | 2010-10-23 08:48:51 -0500 | [diff] [blame] | 434 | # ifdef PNG_FLOATING_POINT_SUPPORTED |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 435 | void PNGAPI |
John Bowler | 4f67e40 | 2011-12-28 08:43:37 -0600 | [diff] [blame] | 436 | png_set_sCAL(png_const_structrp png_ptr, png_inforp info_ptr, int unit, |
| 437 | double width, double height) |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 438 | { |
| 439 | png_debug1(1, "in %s storage function", "sCAL"); |
| 440 | |
| 441 | /* Check the arguments. */ |
| 442 | if (width <= 0) |
| 443 | png_warning(png_ptr, "Invalid sCAL width ignored"); |
Glenn Randers-Pehrson | 62333ba | 2010-10-23 08:48:51 -0500 | [diff] [blame] | 444 | |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 445 | else if (height <= 0) |
| 446 | png_warning(png_ptr, "Invalid sCAL height ignored"); |
Glenn Randers-Pehrson | 62333ba | 2010-10-23 08:48:51 -0500 | [diff] [blame] | 447 | |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 448 | else |
| 449 | { |
| 450 | /* Convert 'width' and 'height' to ASCII. */ |
| 451 | char swidth[PNG_sCAL_MAX_DIGITS+1]; |
| 452 | char sheight[PNG_sCAL_MAX_DIGITS+1]; |
| 453 | |
Glenn Randers-Pehrson | 432c174 | 2012-08-09 20:14:48 -0500 | [diff] [blame] | 454 | png_ascii_from_fp(png_ptr, swidth, (sizeof swidth), width, |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 455 | PNG_sCAL_PRECISION); |
Glenn Randers-Pehrson | 432c174 | 2012-08-09 20:14:48 -0500 | [diff] [blame] | 456 | png_ascii_from_fp(png_ptr, sheight, (sizeof sheight), height, |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 457 | PNG_sCAL_PRECISION); |
| 458 | |
| 459 | png_set_sCAL_s(png_ptr, info_ptr, unit, swidth, sheight); |
| 460 | } |
| 461 | } |
Glenn Randers-Pehrson | 62333ba | 2010-10-23 08:48:51 -0500 | [diff] [blame] | 462 | # endif |
Glenn Randers-Pehrson | 4009a76 | 2010-07-31 06:34:36 -0500 | [diff] [blame] | 463 | |
Glenn Randers-Pehrson | 62333ba | 2010-10-23 08:48:51 -0500 | [diff] [blame] | 464 | # ifdef PNG_FIXED_POINT_SUPPORTED |
Glenn Randers-Pehrson | 4009a76 | 2010-07-31 06:34:36 -0500 | [diff] [blame] | 465 | void PNGAPI |
John Bowler | 4f67e40 | 2011-12-28 08:43:37 -0600 | [diff] [blame] | 466 | png_set_sCAL_fixed(png_const_structrp png_ptr, png_inforp info_ptr, int unit, |
Glenn Randers-Pehrson | 62333ba | 2010-10-23 08:48:51 -0500 | [diff] [blame] | 467 | png_fixed_point width, png_fixed_point height) |
Glenn Randers-Pehrson | 4009a76 | 2010-07-31 06:34:36 -0500 | [diff] [blame] | 468 | { |
| 469 | png_debug1(1, "in %s storage function", "sCAL"); |
| 470 | |
| 471 | /* Check the arguments. */ |
| 472 | if (width <= 0) |
| 473 | png_warning(png_ptr, "Invalid sCAL width ignored"); |
Glenn Randers-Pehrson | 62333ba | 2010-10-23 08:48:51 -0500 | [diff] [blame] | 474 | |
Glenn Randers-Pehrson | 4009a76 | 2010-07-31 06:34:36 -0500 | [diff] [blame] | 475 | else if (height <= 0) |
| 476 | png_warning(png_ptr, "Invalid sCAL height ignored"); |
Glenn Randers-Pehrson | 62333ba | 2010-10-23 08:48:51 -0500 | [diff] [blame] | 477 | |
Glenn Randers-Pehrson | 4009a76 | 2010-07-31 06:34:36 -0500 | [diff] [blame] | 478 | else |
| 479 | { |
| 480 | /* Convert 'width' and 'height' to ASCII. */ |
| 481 | char swidth[PNG_sCAL_MAX_DIGITS+1]; |
| 482 | char sheight[PNG_sCAL_MAX_DIGITS+1]; |
| 483 | |
Glenn Randers-Pehrson | 432c174 | 2012-08-09 20:14:48 -0500 | [diff] [blame] | 484 | png_ascii_from_fixed(png_ptr, swidth, (sizeof swidth), width); |
| 485 | png_ascii_from_fixed(png_ptr, sheight, (sizeof sheight), height); |
Glenn Randers-Pehrson | 4009a76 | 2010-07-31 06:34:36 -0500 | [diff] [blame] | 486 | |
| 487 | png_set_sCAL_s(png_ptr, info_ptr, unit, swidth, sheight); |
| 488 | } |
| 489 | } |
Glenn Randers-Pehrson | 62333ba | 2010-10-23 08:48:51 -0500 | [diff] [blame] | 490 | # endif |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 491 | #endif |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 492 | |
Glenn Randers-Pehrson | e26c095 | 2009-09-23 11:22:08 -0500 | [diff] [blame] | 493 | #ifdef PNG_pHYs_SUPPORTED |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 494 | void PNGAPI |
John Bowler | 4f67e40 | 2011-12-28 08:43:37 -0600 | [diff] [blame] | 495 | png_set_pHYs(png_const_structrp png_ptr, png_inforp info_ptr, |
Glenn Randers-Pehrson | da30135 | 2010-03-06 06:42:48 -0600 | [diff] [blame] | 496 | png_uint_32 res_x, png_uint_32 res_y, int unit_type) |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 497 | { |
Glenn Randers-Pehrson | 51650b8 | 2008-08-05 07:44:42 -0500 | [diff] [blame] | 498 | png_debug1(1, "in %s storage function", "pHYs"); |
Glenn Randers-Pehrson | da00980 | 2009-08-15 13:25:47 -0500 | [diff] [blame] | 499 | |
Glenn Randers-Pehrson | a357b99 | 1998-02-08 20:56:40 -0600 | [diff] [blame] | 500 | if (png_ptr == NULL || info_ptr == NULL) |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 501 | return; |
| 502 | |
| 503 | info_ptr->x_pixels_per_unit = res_x; |
| 504 | info_ptr->y_pixels_per_unit = res_y; |
| 505 | info_ptr->phys_unit_type = (png_byte)unit_type; |
| 506 | info_ptr->valid |= PNG_INFO_pHYs; |
| 507 | } |
| 508 | #endif |
| 509 | |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 510 | void PNGAPI |
John Bowler | 5d56786 | 2011-12-24 09:12:00 -0600 | [diff] [blame] | 511 | png_set_PLTE(png_structrp png_ptr, png_inforp info_ptr, |
Glenn Randers-Pehrson | e600c51 | 2010-08-18 07:25:46 -0500 | [diff] [blame] | 512 | png_const_colorp palette, int num_palette) |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 513 | { |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 514 | |
Glenn Randers-Pehrson | 51650b8 | 2008-08-05 07:44:42 -0500 | [diff] [blame] | 515 | png_debug1(1, "in %s storage function", "PLTE"); |
Glenn Randers-Pehrson | da00980 | 2009-08-15 13:25:47 -0500 | [diff] [blame] | 516 | |
John Bowler | fcd301d | 2011-12-28 21:34:27 -0600 | [diff] [blame] | 517 | if (png_ptr == NULL || info_ptr == NULL || palette == NULL) |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 518 | return; |
| 519 | |
Glenn Randers-Pehrson | 9c3ab68 | 2006-02-20 22:09:05 -0600 | [diff] [blame] | 520 | if (num_palette < 0 || num_palette > PNG_MAX_PALETTE_LENGTH) |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 521 | { |
| 522 | if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE) |
Glenn Randers-Pehrson | 9c3ab68 | 2006-02-20 22:09:05 -0600 | [diff] [blame] | 523 | png_error(png_ptr, "Invalid palette length"); |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 524 | |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 525 | else |
| 526 | { |
Glenn Randers-Pehrson | 9c3ab68 | 2006-02-20 22:09:05 -0600 | [diff] [blame] | 527 | png_warning(png_ptr, "Invalid palette length"); |
| 528 | return; |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 529 | } |
| 530 | } |
Glenn Randers-Pehrson | 9c3ab68 | 2006-02-20 22:09:05 -0600 | [diff] [blame] | 531 | |
Glenn Randers-Pehrson | f81b50b | 2009-12-29 16:50:15 -0600 | [diff] [blame] | 532 | /* It may not actually be necessary to set png_ptr->palette here; |
Glenn Randers-Pehrson | 76e5fd6 | 2000-12-28 07:50:05 -0600 | [diff] [blame] | 533 | * we do it for backward compatibility with the way the png_handle_tRNS |
| 534 | * function used to do the allocation. |
John Bowler | 4f67e40 | 2011-12-28 08:43:37 -0600 | [diff] [blame] | 535 | * |
| 536 | * 1.6.0: the above statement appears to be incorrect; something has to set |
| 537 | * the palette inside png_struct on read. |
Glenn Randers-Pehrson | 76e5fd6 | 2000-12-28 07:50:05 -0600 | [diff] [blame] | 538 | */ |
Glenn Randers-Pehrson | 76e5fd6 | 2000-12-28 07:50:05 -0600 | [diff] [blame] | 539 | png_free_data(png_ptr, info_ptr, PNG_FREE_PLTE, 0); |
Glenn Randers-Pehrson | 5fea36f | 2004-07-28 08:20:44 -0500 | [diff] [blame] | 540 | |
Glenn Randers-Pehrson | 9c3ab68 | 2006-02-20 22:09:05 -0600 | [diff] [blame] | 541 | /* Changed in libpng-1.2.1 to allocate PNG_MAX_PALETTE_LENGTH instead |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 542 | * of num_palette entries, in case of an invalid PNG file that has |
| 543 | * too-large sample values. |
| 544 | */ |
John Bowler | fcd301d | 2011-12-28 21:34:27 -0600 | [diff] [blame] | 545 | png_ptr->palette = png_voidcast(png_colorp, png_calloc(png_ptr, |
Glenn Randers-Pehrson | 432c174 | 2012-08-09 20:14:48 -0500 | [diff] [blame] | 546 | PNG_MAX_PALETTE_LENGTH * (sizeof (png_color)))); |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 547 | |
Glenn Randers-Pehrson | dbb7e19 | 2012-08-10 17:27:42 -0500 | [diff] [blame] | 548 | memcpy(png_ptr->palette, palette, num_palette * (sizeof (png_color))); |
Glenn Randers-Pehrson | 76e5fd6 | 2000-12-28 07:50:05 -0600 | [diff] [blame] | 549 | info_ptr->palette = png_ptr->palette; |
| 550 | info_ptr->num_palette = png_ptr->num_palette = (png_uint_16)num_palette; |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 551 | |
Glenn Randers-Pehrson | 76e5fd6 | 2000-12-28 07:50:05 -0600 | [diff] [blame] | 552 | info_ptr->free_me |= PNG_FREE_PLTE; |
Glenn Randers-Pehrson | 76e5fd6 | 2000-12-28 07:50:05 -0600 | [diff] [blame] | 553 | |
Glenn Randers-Pehrson | a77ef62 | 2000-02-18 13:48:52 -0600 | [diff] [blame] | 554 | info_ptr->valid |= PNG_INFO_PLTE; |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 555 | } |
| 556 | |
Glenn Randers-Pehrson | e26c095 | 2009-09-23 11:22:08 -0500 | [diff] [blame] | 557 | #ifdef PNG_sBIT_SUPPORTED |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 558 | void PNGAPI |
John Bowler | 4f67e40 | 2011-12-28 08:43:37 -0600 | [diff] [blame] | 559 | png_set_sBIT(png_const_structrp png_ptr, png_inforp info_ptr, |
Glenn Randers-Pehrson | e600c51 | 2010-08-18 07:25:46 -0500 | [diff] [blame] | 560 | png_const_color_8p sig_bit) |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 561 | { |
Glenn Randers-Pehrson | 51650b8 | 2008-08-05 07:44:42 -0500 | [diff] [blame] | 562 | png_debug1(1, "in %s storage function", "sBIT"); |
Glenn Randers-Pehrson | da00980 | 2009-08-15 13:25:47 -0500 | [diff] [blame] | 563 | |
John Bowler | fcd301d | 2011-12-28 21:34:27 -0600 | [diff] [blame] | 564 | if (png_ptr == NULL || info_ptr == NULL || sig_bit == NULL) |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 565 | return; |
| 566 | |
John Bowler | fcd301d | 2011-12-28 21:34:27 -0600 | [diff] [blame] | 567 | info_ptr->sig_bit = *sig_bit; |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 568 | info_ptr->valid |= PNG_INFO_sBIT; |
| 569 | } |
| 570 | #endif |
| 571 | |
Glenn Randers-Pehrson | e26c095 | 2009-09-23 11:22:08 -0500 | [diff] [blame] | 572 | #ifdef PNG_sRGB_SUPPORTED |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 573 | void PNGAPI |
John Bowler | 4f67e40 | 2011-12-28 08:43:37 -0600 | [diff] [blame] | 574 | png_set_sRGB(png_const_structrp png_ptr, png_inforp info_ptr, int srgb_intent) |
Glenn Randers-Pehrson | b6ce43d | 1998-01-01 07:13:13 -0600 | [diff] [blame] | 575 | { |
Glenn Randers-Pehrson | 51650b8 | 2008-08-05 07:44:42 -0500 | [diff] [blame] | 576 | png_debug1(1, "in %s storage function", "sRGB"); |
Glenn Randers-Pehrson | da00980 | 2009-08-15 13:25:47 -0500 | [diff] [blame] | 577 | |
Glenn Randers-Pehrson | a357b99 | 1998-02-08 20:56:40 -0600 | [diff] [blame] | 578 | if (png_ptr == NULL || info_ptr == NULL) |
Glenn Randers-Pehrson | b6ce43d | 1998-01-01 07:13:13 -0600 | [diff] [blame] | 579 | return; |
| 580 | |
John Bowler | 520803d | 2012-11-01 08:12:47 -0500 | [diff] [blame] | 581 | (void)png_colorspace_set_sRGB(png_ptr, &info_ptr->colorspace, srgb_intent); |
John Bowler | b11b31a | 2012-03-21 07:55:46 -0500 | [diff] [blame] | 582 | png_colorspace_sync_info(png_ptr, info_ptr); |
Glenn Randers-Pehrson | b6ce43d | 1998-01-01 07:13:13 -0600 | [diff] [blame] | 583 | } |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 584 | |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 585 | void PNGAPI |
John Bowler | 4f67e40 | 2011-12-28 08:43:37 -0600 | [diff] [blame] | 586 | png_set_sRGB_gAMA_and_cHRM(png_const_structrp png_ptr, png_inforp info_ptr, |
Glenn Randers-Pehrson | 8d0bc0f | 2011-01-25 22:15:58 -0600 | [diff] [blame] | 587 | int srgb_intent) |
Glenn Randers-Pehrson | b6ce43d | 1998-01-01 07:13:13 -0600 | [diff] [blame] | 588 | { |
Glenn Randers-Pehrson | 51650b8 | 2008-08-05 07:44:42 -0500 | [diff] [blame] | 589 | png_debug1(1, "in %s storage function", "sRGB_gAMA_and_cHRM"); |
Glenn Randers-Pehrson | da00980 | 2009-08-15 13:25:47 -0500 | [diff] [blame] | 590 | |
Glenn Randers-Pehrson | a357b99 | 1998-02-08 20:56:40 -0600 | [diff] [blame] | 591 | if (png_ptr == NULL || info_ptr == NULL) |
Glenn Randers-Pehrson | b6ce43d | 1998-01-01 07:13:13 -0600 | [diff] [blame] | 592 | return; |
| 593 | |
John Bowler | f8dfd12 | 2012-10-25 19:30:02 -0500 | [diff] [blame] | 594 | if (png_colorspace_set_sRGB(png_ptr, &info_ptr->colorspace, srgb_intent)) |
John Bowler | b11b31a | 2012-03-21 07:55:46 -0500 | [diff] [blame] | 595 | { |
John Bowler | f8dfd12 | 2012-10-25 19:30:02 -0500 | [diff] [blame] | 596 | /* This causes the gAMA and cHRM to be written too */ |
John Bowler | b11b31a | 2012-03-21 07:55:46 -0500 | [diff] [blame] | 597 | info_ptr->colorspace.flags |= |
| 598 | PNG_COLORSPACE_FROM_gAMA|PNG_COLORSPACE_FROM_cHRM; |
| 599 | } |
Glenn Randers-Pehrson | b6ce43d | 1998-01-01 07:13:13 -0600 | [diff] [blame] | 600 | |
John Bowler | b11b31a | 2012-03-21 07:55:46 -0500 | [diff] [blame] | 601 | png_colorspace_sync_info(png_ptr, info_ptr); |
Glenn Randers-Pehrson | b6ce43d | 1998-01-01 07:13:13 -0600 | [diff] [blame] | 602 | } |
Glenn Randers-Pehrson | 02a5e33 | 2008-11-24 22:10:23 -0600 | [diff] [blame] | 603 | #endif /* sRGB */ |
Glenn Randers-Pehrson | b6ce43d | 1998-01-01 07:13:13 -0600 | [diff] [blame] | 604 | |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 605 | |
Glenn Randers-Pehrson | e26c095 | 2009-09-23 11:22:08 -0500 | [diff] [blame] | 606 | #ifdef PNG_iCCP_SUPPORTED |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 607 | void PNGAPI |
John Bowler | 4f67e40 | 2011-12-28 08:43:37 -0600 | [diff] [blame] | 608 | png_set_iCCP(png_const_structrp png_ptr, png_inforp info_ptr, |
Glenn Randers-Pehrson | e600c51 | 2010-08-18 07:25:46 -0500 | [diff] [blame] | 609 | png_const_charp name, int compression_type, |
| 610 | png_const_bytep profile, png_uint_32 proflen) |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 611 | { |
Glenn Randers-Pehrson | 4accabb | 2000-04-14 14:20:47 -0500 | [diff] [blame] | 612 | png_charp new_iccp_name; |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 613 | png_bytep new_iccp_profile; |
John Bowler | f3f7e14 | 2011-09-09 07:32:37 -0500 | [diff] [blame] | 614 | png_size_t length; |
Glenn Randers-Pehrson | 4accabb | 2000-04-14 14:20:47 -0500 | [diff] [blame] | 615 | |
Glenn Randers-Pehrson | 51650b8 | 2008-08-05 07:44:42 -0500 | [diff] [blame] | 616 | png_debug1(1, "in %s storage function", "iCCP"); |
Glenn Randers-Pehrson | da00980 | 2009-08-15 13:25:47 -0500 | [diff] [blame] | 617 | |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 618 | if (png_ptr == NULL || info_ptr == NULL || name == NULL || profile == NULL) |
| 619 | return; |
| 620 | |
John Bowler | b11b31a | 2012-03-21 07:55:46 -0500 | [diff] [blame] | 621 | if (compression_type != PNG_COMPRESSION_TYPE_BASE) |
| 622 | png_app_error(png_ptr, "Invalid iCCP compression method"); |
| 623 | |
| 624 | /* Set the colorspace first because this validates the profile; do not |
| 625 | * override previously set app cHRM or gAMA here (because likely as not the |
John Bowler | 14d0ca6 | 2012-08-25 16:21:46 -0500 | [diff] [blame] | 626 | * application knows better than libpng what the correct values are.) Pass |
| 627 | * the info_ptr color_type field to png_colorspace_set_ICC because in the |
| 628 | * write case it has not yet been stored in png_ptr. |
John Bowler | b11b31a | 2012-03-21 07:55:46 -0500 | [diff] [blame] | 629 | */ |
| 630 | { |
| 631 | int result = png_colorspace_set_ICC(png_ptr, &info_ptr->colorspace, name, |
John Bowler | b98681b | 2012-09-04 11:19:00 -0500 | [diff] [blame] | 632 | proflen, profile, info_ptr->color_type); |
John Bowler | b11b31a | 2012-03-21 07:55:46 -0500 | [diff] [blame] | 633 | |
| 634 | png_colorspace_sync_info(png_ptr, info_ptr); |
| 635 | |
| 636 | /* Don't do any of the copying if the profile was bad, or inconsistent. */ |
| 637 | if (!result) |
| 638 | return; |
| 639 | |
| 640 | /* But do write the gAMA and cHRM chunks from the profile. */ |
| 641 | info_ptr->colorspace.flags |= |
| 642 | PNG_COLORSPACE_FROM_gAMA|PNG_COLORSPACE_FROM_cHRM; |
| 643 | } |
| 644 | |
Glenn Randers-Pehrson | ece07cf | 2012-08-10 18:08:02 -0500 | [diff] [blame] | 645 | length = strlen(name)+1; |
John Bowler | fcd301d | 2011-12-28 21:34:27 -0600 | [diff] [blame] | 646 | new_iccp_name = png_voidcast(png_charp, png_malloc_warn(png_ptr, length)); |
Glenn Randers-Pehrson | 62333ba | 2010-10-23 08:48:51 -0500 | [diff] [blame] | 647 | |
Glenn Randers-Pehrson | 5fea36f | 2004-07-28 08:20:44 -0500 | [diff] [blame] | 648 | if (new_iccp_name == NULL) |
| 649 | { |
John Bowler | b11b31a | 2012-03-21 07:55:46 -0500 | [diff] [blame] | 650 | png_benign_error(png_ptr, "Insufficient memory to process iCCP chunk"); |
Glenn Randers-Pehrson | 5fea36f | 2004-07-28 08:20:44 -0500 | [diff] [blame] | 651 | return; |
| 652 | } |
Glenn Randers-Pehrson | 62333ba | 2010-10-23 08:48:51 -0500 | [diff] [blame] | 653 | |
Glenn Randers-Pehrson | dbb7e19 | 2012-08-10 17:27:42 -0500 | [diff] [blame] | 654 | memcpy(new_iccp_name, name, length); |
John Bowler | fcd301d | 2011-12-28 21:34:27 -0600 | [diff] [blame] | 655 | new_iccp_profile = png_voidcast(png_bytep, |
| 656 | png_malloc_warn(png_ptr, proflen)); |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 657 | |
Glenn Randers-Pehrson | 5fea36f | 2004-07-28 08:20:44 -0500 | [diff] [blame] | 658 | if (new_iccp_profile == NULL) |
| 659 | { |
John Bowler | b11b31a | 2012-03-21 07:55:46 -0500 | [diff] [blame] | 660 | png_free(png_ptr, new_iccp_name); |
| 661 | png_benign_error(png_ptr, |
Glenn Randers-Pehrson | f81b50b | 2009-12-29 16:50:15 -0600 | [diff] [blame] | 662 | "Insufficient memory to process iCCP profile"); |
Glenn Randers-Pehrson | 5fea36f | 2004-07-28 08:20:44 -0500 | [diff] [blame] | 663 | return; |
| 664 | } |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 665 | |
Glenn Randers-Pehrson | dbb7e19 | 2012-08-10 17:27:42 -0500 | [diff] [blame] | 666 | memcpy(new_iccp_profile, profile, proflen); |
Glenn Randers-Pehrson | 4accabb | 2000-04-14 14:20:47 -0500 | [diff] [blame] | 667 | |
Glenn Randers-Pehrson | 38e6e77 | 2000-04-09 19:06:13 -0500 | [diff] [blame] | 668 | png_free_data(png_ptr, info_ptr, PNG_FREE_ICCP, 0); |
Glenn Randers-Pehrson | 4accabb | 2000-04-14 14:20:47 -0500 | [diff] [blame] | 669 | |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 670 | info_ptr->iccp_proflen = proflen; |
Glenn Randers-Pehrson | 4accabb | 2000-04-14 14:20:47 -0500 | [diff] [blame] | 671 | info_ptr->iccp_name = new_iccp_name; |
| 672 | info_ptr->iccp_profile = new_iccp_profile; |
Glenn Randers-Pehrson | a77ef62 | 2000-02-18 13:48:52 -0600 | [diff] [blame] | 673 | info_ptr->free_me |= PNG_FREE_ICCP; |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 674 | info_ptr->valid |= PNG_INFO_iCCP; |
| 675 | } |
| 676 | #endif |
| 677 | |
Glenn Randers-Pehrson | e26c095 | 2009-09-23 11:22:08 -0500 | [diff] [blame] | 678 | #ifdef PNG_TEXT_SUPPORTED |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 679 | void PNGAPI |
John Bowler | 4f67e40 | 2011-12-28 08:43:37 -0600 | [diff] [blame] | 680 | png_set_text(png_const_structrp png_ptr, png_inforp info_ptr, |
| 681 | png_const_textp text_ptr, int num_text) |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 682 | { |
Glenn Randers-Pehrson | 07748d1 | 2002-05-25 11:12:10 -0500 | [diff] [blame] | 683 | int ret; |
Glenn Randers-Pehrson | 895a9c9 | 2008-07-25 08:51:18 -0500 | [diff] [blame] | 684 | ret = png_set_text_2(png_ptr, info_ptr, text_ptr, num_text); |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 685 | |
Glenn Randers-Pehrson | 07748d1 | 2002-05-25 11:12:10 -0500 | [diff] [blame] | 686 | if (ret) |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 687 | png_error(png_ptr, "Insufficient memory to store text"); |
Glenn Randers-Pehrson | 07748d1 | 2002-05-25 11:12:10 -0500 | [diff] [blame] | 688 | } |
| 689 | |
| 690 | int /* PRIVATE */ |
John Bowler | 4f67e40 | 2011-12-28 08:43:37 -0600 | [diff] [blame] | 691 | png_set_text_2(png_const_structrp png_ptr, png_inforp info_ptr, |
Glenn Randers-Pehrson | e600c51 | 2010-08-18 07:25:46 -0500 | [diff] [blame] | 692 | png_const_textp text_ptr, int num_text) |
Glenn Randers-Pehrson | 07748d1 | 2002-05-25 11:12:10 -0500 | [diff] [blame] | 693 | { |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 694 | int i; |
| 695 | |
Glenn Randers-Pehrson | bb5cb14 | 2011-09-22 12:41:58 -0500 | [diff] [blame] | 696 | png_debug1(1, "in %lx storage function", png_ptr == NULL ? "unexpected" : |
| 697 | (unsigned long)png_ptr->chunk_name); |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 698 | |
John Bowler | 2414bd9 | 2013-01-19 23:18:59 -0600 | [diff] [blame^] | 699 | if (png_ptr == NULL || info_ptr == NULL || num_text <= 0 || text_ptr == NULL) |
Glenn Randers-Pehrson | 07748d1 | 2002-05-25 11:12:10 -0500 | [diff] [blame] | 700 | return(0); |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 701 | |
| 702 | /* Make sure we have enough space in the "text" array in info_struct |
John Bowler | 2414bd9 | 2013-01-19 23:18:59 -0600 | [diff] [blame^] | 703 | * to hold all of the incoming text_ptr objects. This compare can't overflow |
| 704 | * because max_text >= num_text (anyway, subtract of two positive integers |
| 705 | * can't overflow in any case.) |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 706 | */ |
John Bowler | 2414bd9 | 2013-01-19 23:18:59 -0600 | [diff] [blame^] | 707 | if (num_text > info_ptr->max_text - info_ptr->num_text) |
Glenn Randers-Pehrson | 590c8b0 | 2013-01-19 08:49:12 -0600 | [diff] [blame] | 708 | { |
Glenn Randers-Pehrson | 96027d9 | 2012-03-29 06:15:55 -0500 | [diff] [blame] | 709 | int old_num_text = info_ptr->num_text; |
John Bowler | 2414bd9 | 2013-01-19 23:18:59 -0600 | [diff] [blame^] | 710 | int max_text; |
| 711 | png_textp new_text = NULL; |
Glenn Randers-Pehrson | 96027d9 | 2012-03-29 06:15:55 -0500 | [diff] [blame] | 712 | |
John Bowler | 2414bd9 | 2013-01-19 23:18:59 -0600 | [diff] [blame^] | 713 | /* Calculate an appropriate max_text, checking for overflow. */ |
| 714 | max_text = old_num_text; |
| 715 | if (num_text <= INT_MAX - max_text) |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 716 | { |
John Bowler | 2414bd9 | 2013-01-19 23:18:59 -0600 | [diff] [blame^] | 717 | max_text += num_text; |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 718 | |
John Bowler | 2414bd9 | 2013-01-19 23:18:59 -0600 | [diff] [blame^] | 719 | /* Round up to a multiple of 8 */ |
| 720 | if (max_text < INT_MAX-8) |
| 721 | max_text = (max_text + 8) & ~0x7; |
Glenn Randers-Pehrson | 96027d9 | 2012-03-29 06:15:55 -0500 | [diff] [blame] | 722 | |
John Bowler | 2414bd9 | 2013-01-19 23:18:59 -0600 | [diff] [blame^] | 723 | else |
| 724 | max_text = INT_MAX; |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 725 | |
John Bowler | 2414bd9 | 2013-01-19 23:18:59 -0600 | [diff] [blame^] | 726 | /* Now allocate a new array and copy the old members in, this does all |
| 727 | * the overflow checks. |
| 728 | */ |
| 729 | new_text = png_voidcast(png_textp,png_realloc_array(png_ptr, |
| 730 | info_ptr->text, old_num_text, max_text-old_num_text, |
| 731 | sizeof *new_text)); |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 732 | } |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 733 | |
John Bowler | 2414bd9 | 2013-01-19 23:18:59 -0600 | [diff] [blame^] | 734 | if (new_text == NULL) |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 735 | { |
John Bowler | 2414bd9 | 2013-01-19 23:18:59 -0600 | [diff] [blame^] | 736 | png_chunk_report(png_ptr, "too many text chunks", |
| 737 | PNG_CHUNK_WRITE_ERROR); |
| 738 | return 1; |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 739 | } |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 740 | |
John Bowler | 2414bd9 | 2013-01-19 23:18:59 -0600 | [diff] [blame^] | 741 | png_free(png_ptr, info_ptr->text); |
| 742 | |
| 743 | info_ptr->text = new_text; |
| 744 | info_ptr->free_me |= PNG_FREE_TEXT; |
| 745 | info_ptr->max_text = max_text; |
| 746 | /* num_text is adjusted below as the entries are copied in */ |
| 747 | |
| 748 | png_debug1(3, "allocated %d entries for info_ptr->text", max_text); |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 749 | } |
John Bowler | 2414bd9 | 2013-01-19 23:18:59 -0600 | [diff] [blame^] | 750 | |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 751 | for (i = 0; i < num_text; i++) |
| 752 | { |
John Bowler | 2414bd9 | 2013-01-19 23:18:59 -0600 | [diff] [blame^] | 753 | size_t text_length, key_len; |
| 754 | size_t lang_len, lang_key_len; |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 755 | png_textp textp = &(info_ptr->text[info_ptr->num_text]); |
| 756 | |
Glenn Randers-Pehrson | 3097f61 | 2001-05-07 14:52:45 -0500 | [diff] [blame] | 757 | if (text_ptr[i].key == NULL) |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 758 | continue; |
| 759 | |
Glenn Randers-Pehrson | 79b2d64 | 2010-10-13 07:31:14 -0500 | [diff] [blame] | 760 | if (text_ptr[i].compression < PNG_TEXT_COMPRESSION_NONE || |
| 761 | text_ptr[i].compression >= PNG_TEXT_COMPRESSION_LAST) |
Glenn Randers-Pehrson | e34f80e | 2010-10-13 06:55:30 -0500 | [diff] [blame] | 762 | { |
John Bowler | 2414bd9 | 2013-01-19 23:18:59 -0600 | [diff] [blame^] | 763 | png_chunk_report(png_ptr, "text compression mode is out of range", |
| 764 | PNG_CHUNK_WRITE_ERROR); |
Glenn Randers-Pehrson | e34f80e | 2010-10-13 06:55:30 -0500 | [diff] [blame] | 765 | continue; |
| 766 | } |
| 767 | |
Glenn Randers-Pehrson | ece07cf | 2012-08-10 18:08:02 -0500 | [diff] [blame] | 768 | key_len = strlen(text_ptr[i].key); |
Glenn Randers-Pehrson | 79b2d64 | 2010-10-13 07:31:14 -0500 | [diff] [blame] | 769 | |
Glenn Randers-Pehrson | 145f5c8 | 2008-07-10 09:13:13 -0500 | [diff] [blame] | 770 | if (text_ptr[i].compression <= 0) |
Glenn Randers-Pehrson | 1ef65b6 | 2000-05-12 06:19:53 -0500 | [diff] [blame] | 771 | { |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 772 | lang_len = 0; |
| 773 | lang_key_len = 0; |
Glenn Randers-Pehrson | 1ef65b6 | 2000-05-12 06:19:53 -0500 | [diff] [blame] | 774 | } |
Glenn Randers-Pehrson | ef29a5e | 2009-10-31 19:37:05 -0500 | [diff] [blame] | 775 | |
Glenn Randers-Pehrson | dd78d52 | 2010-03-30 08:34:02 -0500 | [diff] [blame] | 776 | else |
Glenn Randers-Pehrson | 62333ba | 2010-10-23 08:48:51 -0500 | [diff] [blame] | 777 | # ifdef PNG_iTXt_SUPPORTED |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 778 | { |
Glenn Randers-Pehrson | 4bb4d01 | 2009-05-20 12:45:29 -0500 | [diff] [blame] | 779 | /* Set iTXt data */ |
Glenn Randers-Pehrson | d6ea40a | 2009-11-02 07:32:00 -0600 | [diff] [blame] | 780 | |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 781 | if (text_ptr[i].lang != NULL) |
Glenn Randers-Pehrson | ece07cf | 2012-08-10 18:08:02 -0500 | [diff] [blame] | 782 | lang_len = strlen(text_ptr[i].lang); |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 783 | |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 784 | else |
| 785 | lang_len = 0; |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 786 | |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 787 | if (text_ptr[i].lang_key != NULL) |
Glenn Randers-Pehrson | ece07cf | 2012-08-10 18:08:02 -0500 | [diff] [blame] | 788 | lang_key_len = strlen(text_ptr[i].lang_key); |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 789 | |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 790 | else |
| 791 | lang_key_len = 0; |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 792 | } |
Glenn Randers-Pehrson | 62333ba | 2010-10-23 08:48:51 -0500 | [diff] [blame] | 793 | # else /* PNG_iTXt_SUPPORTED */ |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 794 | { |
John Bowler | 2414bd9 | 2013-01-19 23:18:59 -0600 | [diff] [blame^] | 795 | png_chunk_report(png_ptr, "iTXt chunk not supported", |
| 796 | PNG_CHUNK_WRITE_ERROR); |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 797 | continue; |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 798 | } |
Glenn Randers-Pehrson | 62333ba | 2010-10-23 08:48:51 -0500 | [diff] [blame] | 799 | # endif |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 800 | |
Glenn Randers-Pehrson | 3097f61 | 2001-05-07 14:52:45 -0500 | [diff] [blame] | 801 | if (text_ptr[i].text == NULL || text_ptr[i].text[0] == '\0') |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 802 | { |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 803 | text_length = 0; |
Glenn Randers-Pehrson | 62333ba | 2010-10-23 08:48:51 -0500 | [diff] [blame] | 804 | # ifdef PNG_iTXt_SUPPORTED |
Glenn Randers-Pehrson | 145f5c8 | 2008-07-10 09:13:13 -0500 | [diff] [blame] | 805 | if (text_ptr[i].compression > 0) |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 806 | textp->compression = PNG_ITXT_COMPRESSION_NONE; |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 807 | |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 808 | else |
Glenn Randers-Pehrson | 62333ba | 2010-10-23 08:48:51 -0500 | [diff] [blame] | 809 | # endif |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 810 | textp->compression = PNG_TEXT_COMPRESSION_NONE; |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 811 | } |
Glenn Randers-Pehrson | ef29a5e | 2009-10-31 19:37:05 -0500 | [diff] [blame] | 812 | |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 813 | else |
| 814 | { |
Glenn Randers-Pehrson | ece07cf | 2012-08-10 18:08:02 -0500 | [diff] [blame] | 815 | text_length = strlen(text_ptr[i].text); |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 816 | textp->compression = text_ptr[i].compression; |
| 817 | } |
Glenn Randers-Pehrson | 6d8f3b0 | 1999-10-23 08:39:18 -0500 | [diff] [blame] | 818 | |
John Bowler | 2414bd9 | 2013-01-19 23:18:59 -0600 | [diff] [blame^] | 819 | textp->key = png_voidcast(png_charp,png_malloc_base(png_ptr, |
| 820 | key_len + text_length + lang_len + lang_key_len + 4)); |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 821 | |
Glenn Randers-Pehrson | 07748d1 | 2002-05-25 11:12:10 -0500 | [diff] [blame] | 822 | if (textp->key == NULL) |
John Bowler | 2414bd9 | 2013-01-19 23:18:59 -0600 | [diff] [blame^] | 823 | { |
| 824 | png_chunk_report(png_ptr, "text chunk: out of memory", |
| 825 | PNG_CHUNK_WRITE_ERROR); |
| 826 | return 1; |
| 827 | } |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 828 | |
Glenn Randers-Pehrson | b764c60 | 2011-01-14 21:18:37 -0600 | [diff] [blame] | 829 | png_debug2(2, "Allocated %lu bytes at %p in png_set_text", |
Glenn Randers-Pehrson | da30135 | 2010-03-06 06:42:48 -0600 | [diff] [blame] | 830 | (unsigned long)(png_uint_32) |
| 831 | (key_len + lang_len + lang_key_len + text_length + 4), |
Glenn Randers-Pehrson | b764c60 | 2011-01-14 21:18:37 -0600 | [diff] [blame] | 832 | textp->key); |
Glenn Randers-Pehrson | 6d8f3b0 | 1999-10-23 08:39:18 -0500 | [diff] [blame] | 833 | |
John Bowler | 2414bd9 | 2013-01-19 23:18:59 -0600 | [diff] [blame^] | 834 | memcpy(textp->key, text_ptr[i].key, key_len); |
Glenn Randers-Pehrson | 145f5c8 | 2008-07-10 09:13:13 -0500 | [diff] [blame] | 835 | *(textp->key + key_len) = '\0'; |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 836 | |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 837 | if (text_ptr[i].compression > 0) |
| 838 | { |
Glenn Randers-Pehrson | 895a9c9 | 2008-07-25 08:51:18 -0500 | [diff] [blame] | 839 | textp->lang = textp->key + key_len + 1; |
Glenn Randers-Pehrson | dbb7e19 | 2012-08-10 17:27:42 -0500 | [diff] [blame] | 840 | memcpy(textp->lang, text_ptr[i].lang, lang_len); |
Glenn Randers-Pehrson | 145f5c8 | 2008-07-10 09:13:13 -0500 | [diff] [blame] | 841 | *(textp->lang + lang_len) = '\0'; |
Glenn Randers-Pehrson | 895a9c9 | 2008-07-25 08:51:18 -0500 | [diff] [blame] | 842 | textp->lang_key = textp->lang + lang_len + 1; |
Glenn Randers-Pehrson | dbb7e19 | 2012-08-10 17:27:42 -0500 | [diff] [blame] | 843 | memcpy(textp->lang_key, text_ptr[i].lang_key, lang_key_len); |
Glenn Randers-Pehrson | 145f5c8 | 2008-07-10 09:13:13 -0500 | [diff] [blame] | 844 | *(textp->lang_key + lang_key_len) = '\0'; |
Glenn Randers-Pehrson | 895a9c9 | 2008-07-25 08:51:18 -0500 | [diff] [blame] | 845 | textp->text = textp->lang_key + lang_key_len + 1; |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 846 | } |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 847 | |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 848 | else |
| 849 | { |
Glenn Randers-Pehrson | 3f54925 | 2001-10-27 07:35:13 -0500 | [diff] [blame] | 850 | textp->lang=NULL; |
| 851 | textp->lang_key=NULL; |
Glenn Randers-Pehrson | 895a9c9 | 2008-07-25 08:51:18 -0500 | [diff] [blame] | 852 | textp->text = textp->key + key_len + 1; |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 853 | } |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 854 | |
Glenn Randers-Pehrson | 145f5c8 | 2008-07-10 09:13:13 -0500 | [diff] [blame] | 855 | if (text_length) |
John Bowler | 2414bd9 | 2013-01-19 23:18:59 -0600 | [diff] [blame^] | 856 | memcpy(textp->text, text_ptr[i].text, text_length); |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 857 | |
Glenn Randers-Pehrson | 145f5c8 | 2008-07-10 09:13:13 -0500 | [diff] [blame] | 858 | *(textp->text + text_length) = '\0'; |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 859 | |
Glenn Randers-Pehrson | 62333ba | 2010-10-23 08:48:51 -0500 | [diff] [blame] | 860 | # ifdef PNG_iTXt_SUPPORTED |
Glenn Randers-Pehrson | 145f5c8 | 2008-07-10 09:13:13 -0500 | [diff] [blame] | 861 | if (textp->compression > 0) |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 862 | { |
| 863 | textp->text_length = 0; |
| 864 | textp->itxt_length = text_length; |
| 865 | } |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 866 | |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 867 | else |
Glenn Randers-Pehrson | 62333ba | 2010-10-23 08:48:51 -0500 | [diff] [blame] | 868 | # endif |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 869 | { |
| 870 | textp->text_length = text_length; |
| 871 | textp->itxt_length = 0; |
| 872 | } |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 873 | |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 874 | info_ptr->num_text++; |
Glenn Randers-Pehrson | 51650b8 | 2008-08-05 07:44:42 -0500 | [diff] [blame] | 875 | png_debug1(3, "transferred text chunk %d", info_ptr->num_text); |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 876 | } |
John Bowler | 2414bd9 | 2013-01-19 23:18:59 -0600 | [diff] [blame^] | 877 | |
Glenn Randers-Pehrson | 07748d1 | 2002-05-25 11:12:10 -0500 | [diff] [blame] | 878 | return(0); |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 879 | } |
| 880 | #endif |
| 881 | |
Glenn Randers-Pehrson | e26c095 | 2009-09-23 11:22:08 -0500 | [diff] [blame] | 882 | #ifdef PNG_tIME_SUPPORTED |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 883 | void PNGAPI |
John Bowler | 4f67e40 | 2011-12-28 08:43:37 -0600 | [diff] [blame] | 884 | png_set_tIME(png_const_structrp png_ptr, png_inforp info_ptr, |
| 885 | png_const_timep mod_time) |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 886 | { |
Glenn Randers-Pehrson | 51650b8 | 2008-08-05 07:44:42 -0500 | [diff] [blame] | 887 | png_debug1(1, "in %s storage function", "tIME"); |
Glenn Randers-Pehrson | da00980 | 2009-08-15 13:25:47 -0500 | [diff] [blame] | 888 | |
John Bowler | fcd301d | 2011-12-28 21:34:27 -0600 | [diff] [blame] | 889 | if (png_ptr == NULL || info_ptr == NULL || mod_time == NULL || |
Glenn Randers-Pehrson | 5379b24 | 1999-11-27 10:22:33 -0600 | [diff] [blame] | 890 | (png_ptr->mode & PNG_WROTE_tIME)) |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 891 | return; |
| 892 | |
Glenn Randers-Pehrson | 29fca79 | 2011-11-19 15:08:04 -0600 | [diff] [blame] | 893 | if (mod_time->month == 0 || mod_time->month > 12 || |
| 894 | mod_time->day == 0 || mod_time->day > 31 || |
| 895 | mod_time->hour > 23 || mod_time->minute > 59 || |
| 896 | mod_time->second > 60) |
| 897 | { |
| 898 | png_warning(png_ptr, "Ignoring invalid time value"); |
| 899 | return; |
| 900 | } |
| 901 | |
John Bowler | fcd301d | 2011-12-28 21:34:27 -0600 | [diff] [blame] | 902 | info_ptr->mod_time = *mod_time; |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 903 | info_ptr->valid |= PNG_INFO_tIME; |
| 904 | } |
| 905 | #endif |
| 906 | |
Glenn Randers-Pehrson | e26c095 | 2009-09-23 11:22:08 -0500 | [diff] [blame] | 907 | #ifdef PNG_tRNS_SUPPORTED |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 908 | void PNGAPI |
John Bowler | 5d56786 | 2011-12-24 09:12:00 -0600 | [diff] [blame] | 909 | png_set_tRNS(png_structrp png_ptr, png_inforp info_ptr, |
Glenn Randers-Pehrson | e600c51 | 2010-08-18 07:25:46 -0500 | [diff] [blame] | 910 | png_const_bytep trans_alpha, int num_trans, png_const_color_16p trans_color) |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 911 | { |
Glenn Randers-Pehrson | 51650b8 | 2008-08-05 07:44:42 -0500 | [diff] [blame] | 912 | png_debug1(1, "in %s storage function", "tRNS"); |
Glenn Randers-Pehrson | da00980 | 2009-08-15 13:25:47 -0500 | [diff] [blame] | 913 | |
Glenn Randers-Pehrson | a357b99 | 1998-02-08 20:56:40 -0600 | [diff] [blame] | 914 | if (png_ptr == NULL || info_ptr == NULL) |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 915 | return; |
| 916 | |
Glenn Randers-Pehrson | 6abea75 | 2009-08-08 16:52:06 -0500 | [diff] [blame] | 917 | if (trans_alpha != NULL) |
Glenn Randers-Pehrson | 76e5fd6 | 2000-12-28 07:50:05 -0600 | [diff] [blame] | 918 | { |
Glenn Randers-Pehrson | ef29a5e | 2009-10-31 19:37:05 -0500 | [diff] [blame] | 919 | /* It may not actually be necessary to set png_ptr->trans_alpha here; |
Glenn Randers-Pehrson | d1e8c86 | 2002-06-20 06:54:34 -0500 | [diff] [blame] | 920 | * we do it for backward compatibility with the way the png_handle_tRNS |
| 921 | * function used to do the allocation. |
John Bowler | 4f67e40 | 2011-12-28 08:43:37 -0600 | [diff] [blame] | 922 | * |
| 923 | * 1.6.0: The above statement is incorrect; png_handle_tRNS effectively |
| 924 | * relies on png_set_tRNS storing the information in png_struct |
| 925 | * (otherwise it won't be there for the code in pngrtran.c). |
Glenn Randers-Pehrson | d1e8c86 | 2002-06-20 06:54:34 -0500 | [diff] [blame] | 926 | */ |
Glenn Randers-Pehrson | 145f5c8 | 2008-07-10 09:13:13 -0500 | [diff] [blame] | 927 | |
Glenn Randers-Pehrson | 76e5fd6 | 2000-12-28 07:50:05 -0600 | [diff] [blame] | 928 | png_free_data(png_ptr, info_ptr, PNG_FREE_TRNS, 0); |
Glenn Randers-Pehrson | 145f5c8 | 2008-07-10 09:13:13 -0500 | [diff] [blame] | 929 | |
Glenn Randers-Pehrson | 9c3ab68 | 2006-02-20 22:09:05 -0600 | [diff] [blame] | 930 | /* Changed from num_trans to PNG_MAX_PALETTE_LENGTH in version 1.2.1 */ |
John Bowler | 4f67e40 | 2011-12-28 08:43:37 -0600 | [diff] [blame] | 931 | png_ptr->trans_alpha = info_ptr->trans_alpha = png_voidcast(png_bytep, |
| 932 | png_malloc(png_ptr, PNG_MAX_PALETTE_LENGTH)); |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 933 | |
Glenn Randers-Pehrson | 145f5c8 | 2008-07-10 09:13:13 -0500 | [diff] [blame] | 934 | if (num_trans > 0 && num_trans <= PNG_MAX_PALETTE_LENGTH) |
Glenn Randers-Pehrson | dbb7e19 | 2012-08-10 17:27:42 -0500 | [diff] [blame] | 935 | memcpy(info_ptr->trans_alpha, trans_alpha, (png_size_t)num_trans); |
Glenn Randers-Pehrson | 76e5fd6 | 2000-12-28 07:50:05 -0600 | [diff] [blame] | 936 | } |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 937 | |
Glenn Randers-Pehrson | 56f6396 | 2008-10-06 10:16:17 -0500 | [diff] [blame] | 938 | if (trans_color != NULL) |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 939 | { |
Glenn Randers-Pehrson | 145f5c8 | 2008-07-10 09:13:13 -0500 | [diff] [blame] | 940 | int sample_max = (1 << info_ptr->bit_depth); |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 941 | |
Glenn Randers-Pehrson | 145f5c8 | 2008-07-10 09:13:13 -0500 | [diff] [blame] | 942 | if ((info_ptr->color_type == PNG_COLOR_TYPE_GRAY && |
John Bowler | 4f67e40 | 2011-12-28 08:43:37 -0600 | [diff] [blame] | 943 | trans_color->gray > sample_max) || |
Glenn Randers-Pehrson | 145f5c8 | 2008-07-10 09:13:13 -0500 | [diff] [blame] | 944 | (info_ptr->color_type == PNG_COLOR_TYPE_RGB && |
John Bowler | 4f67e40 | 2011-12-28 08:43:37 -0600 | [diff] [blame] | 945 | (trans_color->red > sample_max || |
| 946 | trans_color->green > sample_max || |
| 947 | trans_color->blue > sample_max))) |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 948 | png_warning(png_ptr, |
| 949 | "tRNS chunk has out-of-range samples for bit_depth"); |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 950 | |
John Bowler | fcd301d | 2011-12-28 21:34:27 -0600 | [diff] [blame] | 951 | info_ptr->trans_color = *trans_color; |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 952 | |
Glenn Randers-Pehrson | b6ce43d | 1998-01-01 07:13:13 -0600 | [diff] [blame] | 953 | if (num_trans == 0) |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 954 | num_trans = 1; |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 955 | } |
Glenn Randers-Pehrson | 145f5c8 | 2008-07-10 09:13:13 -0500 | [diff] [blame] | 956 | |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 957 | info_ptr->num_trans = (png_uint_16)num_trans; |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 958 | |
Glenn Randers-Pehrson | 145f5c8 | 2008-07-10 09:13:13 -0500 | [diff] [blame] | 959 | if (num_trans != 0) |
| 960 | { |
| 961 | info_ptr->valid |= PNG_INFO_tRNS; |
Glenn Randers-Pehrson | 145f5c8 | 2008-07-10 09:13:13 -0500 | [diff] [blame] | 962 | info_ptr->free_me |= PNG_FREE_TRNS; |
Glenn Randers-Pehrson | 145f5c8 | 2008-07-10 09:13:13 -0500 | [diff] [blame] | 963 | } |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 964 | } |
| 965 | #endif |
| 966 | |
Glenn Randers-Pehrson | e26c095 | 2009-09-23 11:22:08 -0500 | [diff] [blame] | 967 | #ifdef PNG_sPLT_SUPPORTED |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 968 | void PNGAPI |
John Bowler | 4f67e40 | 2011-12-28 08:43:37 -0600 | [diff] [blame] | 969 | png_set_sPLT(png_const_structrp png_ptr, |
John Bowler | 5d56786 | 2011-12-24 09:12:00 -0600 | [diff] [blame] | 970 | png_inforp info_ptr, png_const_sPLT_tp entries, int nentries) |
Glenn Randers-Pehrson | 3779c69 | 2006-11-07 20:38:11 -0600 | [diff] [blame] | 971 | /* |
| 972 | * entries - array of png_sPLT_t structures |
| 973 | * to be added to the list of palettes |
| 974 | * in the info structure. |
Glenn Randers-Pehrson | 62333ba | 2010-10-23 08:48:51 -0500 | [diff] [blame] | 975 | * |
Glenn Randers-Pehrson | 3779c69 | 2006-11-07 20:38:11 -0600 | [diff] [blame] | 976 | * nentries - number of palette structures to be |
| 977 | * added. |
| 978 | */ |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 979 | { |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 980 | png_sPLT_tp np; |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 981 | |
John Bowler | 2414bd9 | 2013-01-19 23:18:59 -0600 | [diff] [blame^] | 982 | if (png_ptr == NULL || info_ptr == NULL || nentries <= 0 || entries == NULL) |
Glenn Randers-Pehrson | 07748d1 | 2002-05-25 11:12:10 -0500 | [diff] [blame] | 983 | return; |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 984 | |
John Bowler | 2414bd9 | 2013-01-19 23:18:59 -0600 | [diff] [blame^] | 985 | /* Use the internal realloc function, which checks for all the possible |
| 986 | * overflows. Notice that the parameters are (int) and (size_t) |
| 987 | */ |
| 988 | np = png_voidcast(png_sPLT_tp,png_realloc_array(png_ptr, |
| 989 | info_ptr->splt_palettes, info_ptr->splt_palettes_num, nentries, |
| 990 | sizeof *np)); |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 991 | |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 992 | if (np == NULL) |
| 993 | { |
John Bowler | 2414bd9 | 2013-01-19 23:18:59 -0600 | [diff] [blame^] | 994 | /* Out of memory or too many chunks */ |
| 995 | png_chunk_report(png_ptr, "too many sPLT chunks", PNG_CHUNK_WRITE_ERROR); |
Glenn Randers-Pehrson | f81b50b | 2009-12-29 16:50:15 -0600 | [diff] [blame] | 996 | return; |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 997 | } |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 998 | |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 999 | png_free(png_ptr, info_ptr->splt_palettes); |
John Bowler | 2414bd9 | 2013-01-19 23:18:59 -0600 | [diff] [blame^] | 1000 | info_ptr->splt_palettes = np; |
| 1001 | info_ptr->free_me |= PNG_FREE_SPLT; |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1002 | |
John Bowler | 2414bd9 | 2013-01-19 23:18:59 -0600 | [diff] [blame^] | 1003 | np += info_ptr->splt_palettes_num; |
| 1004 | |
| 1005 | do |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 1006 | { |
John Bowler | f3f7e14 | 2011-09-09 07:32:37 -0500 | [diff] [blame] | 1007 | png_size_t length; |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 1008 | |
John Bowler | 2414bd9 | 2013-01-19 23:18:59 -0600 | [diff] [blame^] | 1009 | /* Skip invalid input entries */ |
| 1010 | if (entries->name == NULL || entries->entries == NULL) |
| 1011 | { |
| 1012 | /* png_handle_sPLT doesn't do this, so this is an app error */ |
| 1013 | png_app_error(png_ptr, "png_set_sPLT: invalid sPLT"); |
| 1014 | /* Just skip the invalid entry */ |
| 1015 | continue; |
| 1016 | } |
| 1017 | |
| 1018 | np->depth = entries->depth; |
| 1019 | |
| 1020 | /* In the even of out-of-memory just return - there's no point keeping on |
| 1021 | * trying to add sPLT chunks. |
John Bowler | fcd301d | 2011-12-28 21:34:27 -0600 | [diff] [blame] | 1022 | */ |
John Bowler | 2414bd9 | 2013-01-19 23:18:59 -0600 | [diff] [blame^] | 1023 | length = strlen(entries->name) + 1; |
| 1024 | np->name = png_voidcast(png_charp, png_malloc_base(png_ptr, length)); |
John Bowler | fcd301d | 2011-12-28 21:34:27 -0600 | [diff] [blame] | 1025 | |
John Bowler | 2414bd9 | 2013-01-19 23:18:59 -0600 | [diff] [blame^] | 1026 | if (np->name == NULL) |
| 1027 | break; |
John Bowler | fcd301d | 2011-12-28 21:34:27 -0600 | [diff] [blame] | 1028 | |
John Bowler | 2414bd9 | 2013-01-19 23:18:59 -0600 | [diff] [blame^] | 1029 | memcpy(np->name, entries->name, length); |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 1030 | |
John Bowler | 2414bd9 | 2013-01-19 23:18:59 -0600 | [diff] [blame^] | 1031 | /* IMPORTANT: we have memory now that won't get freed if something else |
| 1032 | * goes wrong, this code must free it. png_malloc_array produces no |
| 1033 | * warnings, use a png_chunk_report (below) if there is an error. |
| 1034 | */ |
| 1035 | np->entries = png_voidcast(png_sPLT_entryp, png_malloc_array(png_ptr, |
| 1036 | entries->nentries, sizeof (png_sPLT_entry))); |
| 1037 | |
| 1038 | if (np->entries == NULL) |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 1039 | { |
John Bowler | 2414bd9 | 2013-01-19 23:18:59 -0600 | [diff] [blame^] | 1040 | png_free(png_ptr, np->name); |
| 1041 | break; |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 1042 | } |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 1043 | |
John Bowler | 2414bd9 | 2013-01-19 23:18:59 -0600 | [diff] [blame^] | 1044 | np->nentries = entries->nentries; |
| 1045 | /* This multiply can't overflow because png_malloc_array has already |
| 1046 | * checked it when doing the allocation. |
| 1047 | */ |
| 1048 | memcpy(np->entries, entries->entries, |
| 1049 | entries->nentries * sizeof (png_sPLT_entry)); |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 1050 | |
John Bowler | 2414bd9 | 2013-01-19 23:18:59 -0600 | [diff] [blame^] | 1051 | /* Note that 'continue' skips the advance of the out pointer and out |
| 1052 | * count, so an invalid entry is not added. |
| 1053 | */ |
| 1054 | info_ptr->valid |= PNG_INFO_sPLT; |
| 1055 | ++(info_ptr->splt_palettes_num); |
| 1056 | ++np; |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 1057 | } |
John Bowler | 2414bd9 | 2013-01-19 23:18:59 -0600 | [diff] [blame^] | 1058 | while (++entries, --nentries); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1059 | |
John Bowler | 2414bd9 | 2013-01-19 23:18:59 -0600 | [diff] [blame^] | 1060 | if (nentries > 0) |
| 1061 | png_chunk_report(png_ptr, "sPLT out of memory", PNG_CHUNK_WRITE_ERROR); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1062 | } |
| 1063 | #endif /* PNG_sPLT_SUPPORTED */ |
| 1064 | |
John Bowler | e956751 | 2012-08-15 22:53:00 -0500 | [diff] [blame] | 1065 | #ifdef PNG_STORE_UNKNOWN_CHUNKS_SUPPORTED |
| 1066 | static png_byte |
John Bowler | b98681b | 2012-09-04 11:19:00 -0500 | [diff] [blame] | 1067 | check_location(png_const_structrp png_ptr, int location) |
John Bowler | e956751 | 2012-08-15 22:53:00 -0500 | [diff] [blame] | 1068 | { |
| 1069 | location &= (PNG_HAVE_IHDR|PNG_HAVE_PLTE|PNG_AFTER_IDAT); |
| 1070 | |
| 1071 | /* New in 1.6.0; copy the location and check it. This is an API |
| 1072 | * change, previously the app had to use the |
| 1073 | * png_set_unknown_chunk_location API below for each chunk. |
| 1074 | */ |
| 1075 | if (location == 0 && !(png_ptr->mode & PNG_IS_READ_STRUCT)) |
| 1076 | { |
| 1077 | /* Write struct, so unknown chunks come from the app */ |
| 1078 | png_app_warning(png_ptr, |
| 1079 | "png_set_unknown_chunks now expects a valid location"); |
| 1080 | /* Use the old behavior */ |
John Bowler | b98681b | 2012-09-04 11:19:00 -0500 | [diff] [blame] | 1081 | location = (png_byte)(png_ptr->mode & |
| 1082 | (PNG_HAVE_IHDR|PNG_HAVE_PLTE|PNG_AFTER_IDAT)); |
John Bowler | e956751 | 2012-08-15 22:53:00 -0500 | [diff] [blame] | 1083 | } |
| 1084 | |
John Bowler | 2414bd9 | 2013-01-19 23:18:59 -0600 | [diff] [blame^] | 1085 | /* This need not be an internal error - if the app calls |
| 1086 | * png_set_unknown_chunks on a read pointer it must get the location right. |
| 1087 | */ |
John Bowler | e956751 | 2012-08-15 22:53:00 -0500 | [diff] [blame] | 1088 | if (location == 0) |
| 1089 | png_error(png_ptr, "invalid location in png_set_unknown_chunks"); |
| 1090 | |
| 1091 | /* Now reduce the location to the top-most set bit by removing each least |
| 1092 | * significant bit in turn. |
| 1093 | */ |
| 1094 | while (location != (location & -location)) |
John Bowler | b98681b | 2012-09-04 11:19:00 -0500 | [diff] [blame] | 1095 | location &= ~(location & -location); |
John Bowler | e956751 | 2012-08-15 22:53:00 -0500 | [diff] [blame] | 1096 | |
| 1097 | /* The cast is safe because 'location' is a bit mask and only the low four |
| 1098 | * bits are significant. |
| 1099 | */ |
| 1100 | return (png_byte)location; |
| 1101 | } |
| 1102 | |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 1103 | void PNGAPI |
John Bowler | 4f67e40 | 2011-12-28 08:43:37 -0600 | [diff] [blame] | 1104 | png_set_unknown_chunks(png_const_structrp png_ptr, |
Glenn Randers-Pehrson | 590c8b0 | 2013-01-19 08:49:12 -0600 | [diff] [blame] | 1105 | png_inforp info_ptr, png_const_unknown_chunkp unknowns, int num_unknowns) |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1106 | { |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 1107 | png_unknown_chunkp np; |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1108 | |
John Bowler | 2414bd9 | 2013-01-19 23:18:59 -0600 | [diff] [blame^] | 1109 | if (png_ptr == NULL || info_ptr == NULL || num_unknowns <= 0 || |
| 1110 | unknowns == NULL) |
Glenn Randers-Pehrson | 83fb855 | 2009-06-16 17:52:23 -0500 | [diff] [blame] | 1111 | return; |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 1112 | |
John Bowler | 4a6c6df | 2012-08-16 16:12:13 -0500 | [diff] [blame] | 1113 | /* Check for the failure cases where support has been disabled at compile |
| 1114 | * time. This code is hardly ever compiled - it's here because |
| 1115 | * STORE_UNKNOWN_CHUNKS is set by both read and write code (compiling in this |
| 1116 | * code) but may be meaningless if the read or write handling of unknown |
| 1117 | * chunks is not compiled in. |
| 1118 | */ |
| 1119 | # if !(defined PNG_READ_UNKNOWN_CHUNKS_SUPPORTED) && \ |
| 1120 | (defined PNG_READ_SUPPORTED) |
| 1121 | if (png_ptr->mode & PNG_IS_READ_STRUCT) |
| 1122 | { |
| 1123 | png_app_error(png_ptr, "no unknown chunk support on read"); |
| 1124 | return; |
| 1125 | } |
| 1126 | # endif |
| 1127 | # if !(defined PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED) && \ |
| 1128 | (defined PNG_WRITE_SUPPORTED) |
| 1129 | if (!(png_ptr->mode & PNG_IS_READ_STRUCT)) |
| 1130 | { |
| 1131 | png_app_error(png_ptr, "no unknown chunk support on write"); |
| 1132 | return; |
| 1133 | } |
| 1134 | # endif |
| 1135 | |
John Bowler | 2414bd9 | 2013-01-19 23:18:59 -0600 | [diff] [blame^] | 1136 | /* Prior to 1.6.0 this code used png_malloc_warn; however, this meant that |
| 1137 | * unknown critical chunks could be lost with just a warning resulting in |
| 1138 | * undefined behavior. Now png_chunk_report is used to provide behavior |
| 1139 | * appropriate to read or write. |
| 1140 | */ |
| 1141 | np = png_voidcast(png_unknown_chunkp, png_realloc_array(png_ptr, |
| 1142 | info_ptr->unknown_chunks, info_ptr->unknown_chunks_num, num_unknowns, |
| 1143 | sizeof *np)); |
Glenn Randers-Pehrson | 590c8b0 | 2013-01-19 08:49:12 -0600 | [diff] [blame] | 1144 | |
| 1145 | if (np == NULL) |
| 1146 | { |
John Bowler | 2414bd9 | 2013-01-19 23:18:59 -0600 | [diff] [blame^] | 1147 | png_chunk_report(png_ptr, "too many unknown chunks", |
| 1148 | PNG_CHUNK_WRITE_ERROR); |
John Bowler | 1c6e22a | 2013-01-10 10:55:34 -0600 | [diff] [blame] | 1149 | return; |
| 1150 | } |
| 1151 | |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 1152 | png_free(png_ptr, info_ptr->unknown_chunks); |
John Bowler | e956751 | 2012-08-15 22:53:00 -0500 | [diff] [blame] | 1153 | info_ptr->unknown_chunks = np; /* safe because it is initialized */ |
| 1154 | info_ptr->free_me |= PNG_FREE_UNKN; |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1155 | |
John Bowler | e956751 | 2012-08-15 22:53:00 -0500 | [diff] [blame] | 1156 | np += info_ptr->unknown_chunks_num; |
| 1157 | |
| 1158 | /* Increment unknown_chunks_num each time round the loop to protect the |
| 1159 | * just-allocated chunk data. |
| 1160 | */ |
John Bowler | 2414bd9 | 2013-01-19 23:18:59 -0600 | [diff] [blame^] | 1161 | for (; num_unknowns > 0; --num_unknowns, ++unknowns) |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 1162 | { |
John Bowler | 2414bd9 | 2013-01-19 23:18:59 -0600 | [diff] [blame^] | 1163 | memcpy(np->name, unknowns->name, (sizeof np->name)); |
John Bowler | e956751 | 2012-08-15 22:53:00 -0500 | [diff] [blame] | 1164 | np->name[(sizeof np->name)-1] = '\0'; |
John Bowler | e956751 | 2012-08-15 22:53:00 -0500 | [diff] [blame] | 1165 | np->location = check_location(png_ptr, unknowns->location); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1166 | |
John Bowler | e956751 | 2012-08-15 22:53:00 -0500 | [diff] [blame] | 1167 | if (unknowns->size == 0) |
John Bowler | 2414bd9 | 2013-01-19 23:18:59 -0600 | [diff] [blame^] | 1168 | { |
John Bowler | e956751 | 2012-08-15 22:53:00 -0500 | [diff] [blame] | 1169 | np->data = NULL; |
John Bowler | 2414bd9 | 2013-01-19 23:18:59 -0600 | [diff] [blame^] | 1170 | np->size = 0; |
| 1171 | } |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 1172 | |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 1173 | else |
| 1174 | { |
John Bowler | e956751 | 2012-08-15 22:53:00 -0500 | [diff] [blame] | 1175 | np->data = png_voidcast(png_bytep, |
John Bowler | 2414bd9 | 2013-01-19 23:18:59 -0600 | [diff] [blame^] | 1176 | png_malloc_base(png_ptr, unknowns->size)); |
| 1177 | |
| 1178 | if (np->data == NULL) |
| 1179 | { |
| 1180 | png_chunk_report(png_ptr, "unknown chunk: out of memory", |
| 1181 | PNG_CHUNK_WRITE_ERROR); |
| 1182 | /* But just skip storing the unknown chunk */ |
| 1183 | continue; |
| 1184 | } |
| 1185 | |
John Bowler | e956751 | 2012-08-15 22:53:00 -0500 | [diff] [blame] | 1186 | memcpy(np->data, unknowns->data, unknowns->size); |
John Bowler | 2414bd9 | 2013-01-19 23:18:59 -0600 | [diff] [blame^] | 1187 | np->size = unknowns->size; |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 1188 | } |
John Bowler | 2414bd9 | 2013-01-19 23:18:59 -0600 | [diff] [blame^] | 1189 | |
| 1190 | /* These increments are skipped on out-of-memory for the data - the |
| 1191 | * unknown chunk entry gets overwritten if the png_chunk_report returns. |
| 1192 | * This is correct in the read case (the chunk is just dropped.) |
| 1193 | */ |
| 1194 | ++np; |
| 1195 | ++(info_ptr->unknown_chunks_num); |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 1196 | } |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1197 | } |
Glenn Randers-Pehrson | 67439c4 | 2010-08-19 07:01:09 -0500 | [diff] [blame] | 1198 | |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 1199 | void PNGAPI |
John Bowler | 4f67e40 | 2011-12-28 08:43:37 -0600 | [diff] [blame] | 1200 | png_set_unknown_chunk_location(png_const_structrp png_ptr, png_inforp info_ptr, |
Glenn Randers-Pehrson | da30135 | 2010-03-06 06:42:48 -0600 | [diff] [blame] | 1201 | int chunk, int location) |
Glenn Randers-Pehrson | 228bd39 | 2000-04-23 23:14:02 -0500 | [diff] [blame] | 1202 | { |
John Bowler | e956751 | 2012-08-15 22:53:00 -0500 | [diff] [blame] | 1203 | /* This API is pretty pointless in 1.6.0 because the location can be set |
| 1204 | * before the call to png_set_unknown_chunks. |
| 1205 | * |
| 1206 | * TODO: add a png_app_warning in 1.7 |
| 1207 | */ |
| 1208 | if (png_ptr != NULL && info_ptr != NULL && chunk >= 0 && |
John Bowler | 2414bd9 | 2013-01-19 23:18:59 -0600 | [diff] [blame^] | 1209 | chunk < info_ptr->unknown_chunks_num) |
John Bowler | e956751 | 2012-08-15 22:53:00 -0500 | [diff] [blame] | 1210 | { |
| 1211 | if ((location & (PNG_HAVE_IHDR|PNG_HAVE_PLTE|PNG_AFTER_IDAT)) == 0) |
| 1212 | { |
| 1213 | png_app_error(png_ptr, "invalid unknown chunk location"); |
| 1214 | /* Fake out the pre 1.6.0 behavior: */ |
| 1215 | if ((location & PNG_HAVE_IDAT)) /* undocumented! */ |
| 1216 | location = PNG_AFTER_IDAT; |
| 1217 | |
| 1218 | else |
| 1219 | location = PNG_HAVE_IHDR; /* also undocumented */ |
| 1220 | } |
| 1221 | |
| 1222 | info_ptr->unknown_chunks[chunk].location = |
John Bowler | b98681b | 2012-09-04 11:19:00 -0500 | [diff] [blame] | 1223 | check_location(png_ptr, location); |
John Bowler | e956751 | 2012-08-15 22:53:00 -0500 | [diff] [blame] | 1224 | } |
Glenn Randers-Pehrson | 228bd39 | 2000-04-23 23:14:02 -0500 | [diff] [blame] | 1225 | } |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1226 | #endif |
| 1227 | |
Glenn Randers-Pehrson | 145f5c8 | 2008-07-10 09:13:13 -0500 | [diff] [blame] | 1228 | |
Glenn Randers-Pehrson | e26c095 | 2009-09-23 11:22:08 -0500 | [diff] [blame] | 1229 | #ifdef PNG_MNG_FEATURES_SUPPORTED |
Glenn Randers-Pehrson | 5e5c1e1 | 2000-11-10 12:26:19 -0600 | [diff] [blame] | 1230 | png_uint_32 PNGAPI |
John Bowler | 5d56786 | 2011-12-24 09:12:00 -0600 | [diff] [blame] | 1231 | png_permit_mng_features (png_structrp png_ptr, png_uint_32 mng_features) |
Glenn Randers-Pehrson | 5e5c1e1 | 2000-11-10 12:26:19 -0600 | [diff] [blame] | 1232 | { |
Glenn Randers-Pehrson | 51650b8 | 2008-08-05 07:44:42 -0500 | [diff] [blame] | 1233 | png_debug(1, "in png_permit_mng_features"); |
Glenn Randers-Pehrson | da00980 | 2009-08-15 13:25:47 -0500 | [diff] [blame] | 1234 | |
Glenn Randers-Pehrson | 5e5c1e1 | 2000-11-10 12:26:19 -0600 | [diff] [blame] | 1235 | if (png_ptr == NULL) |
John Bowler | 4f67e40 | 2011-12-28 08:43:37 -0600 | [diff] [blame] | 1236 | return 0; |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 1237 | |
John Bowler | 4f67e40 | 2011-12-28 08:43:37 -0600 | [diff] [blame] | 1238 | png_ptr->mng_features_permitted = mng_features & PNG_ALL_MNG_FEATURES; |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 1239 | |
John Bowler | 4f67e40 | 2011-12-28 08:43:37 -0600 | [diff] [blame] | 1240 | return png_ptr->mng_features_permitted; |
Glenn Randers-Pehrson | 4393a9a | 1999-09-17 12:27:26 -0500 | [diff] [blame] | 1241 | } |
| 1242 | #endif |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1243 | |
Glenn Randers-Pehrson | 6ba9088 | 2009-12-25 14:26:13 -0600 | [diff] [blame] | 1244 | #ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED |
John Bowler | e956751 | 2012-08-15 22:53:00 -0500 | [diff] [blame] | 1245 | static unsigned int |
| 1246 | add_one_chunk(png_bytep list, unsigned int count, png_const_bytep add, int keep) |
| 1247 | { |
| 1248 | unsigned int i; |
| 1249 | |
| 1250 | /* Utility function: update the 'keep' state of a chunk if it is already in |
| 1251 | * the list, otherwise add it to the list. |
| 1252 | */ |
| 1253 | for (i=0; i<count; ++i, list += 5) if (memcmp(list, add, 4) == 0) |
| 1254 | { |
| 1255 | list[4] = (png_byte)keep; |
| 1256 | return count; |
| 1257 | } |
| 1258 | |
| 1259 | if (keep != PNG_HANDLE_CHUNK_AS_DEFAULT) |
| 1260 | { |
| 1261 | ++count; |
| 1262 | memcpy(list, add, 4); |
| 1263 | list[4] = (png_byte)keep; |
| 1264 | } |
| 1265 | |
| 1266 | return count; |
| 1267 | } |
| 1268 | |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 1269 | void PNGAPI |
John Bowler | e956751 | 2012-08-15 22:53:00 -0500 | [diff] [blame] | 1270 | png_set_keep_unknown_chunks(png_structrp png_ptr, int keep, |
Glenn Randers-Pehrson | 702053d | 2012-08-17 21:23:06 -0500 | [diff] [blame] | 1271 | png_const_bytep chunk_list, int num_chunks_in) |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 1272 | { |
John Bowler | e956751 | 2012-08-15 22:53:00 -0500 | [diff] [blame] | 1273 | png_bytep new_list; |
| 1274 | unsigned int num_chunks, old_num_chunks; |
| 1275 | |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 1276 | if (png_ptr == NULL) |
| 1277 | return; |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 1278 | |
John Bowler | e956751 | 2012-08-15 22:53:00 -0500 | [diff] [blame] | 1279 | if (keep < 0 || keep >= PNG_HANDLE_CHUNK_LAST) |
John Bowler | aa9dea5 | 2012-08-10 19:04:08 -0500 | [diff] [blame] | 1280 | { |
John Bowler | e956751 | 2012-08-15 22:53:00 -0500 | [diff] [blame] | 1281 | png_app_error(png_ptr, "png_set_keep_unknown_chunks: invalid keep"); |
| 1282 | return; |
John Bowler | aa9dea5 | 2012-08-10 19:04:08 -0500 | [diff] [blame] | 1283 | } |
| 1284 | |
Glenn Randers-Pehrson | 702053d | 2012-08-17 21:23:06 -0500 | [diff] [blame] | 1285 | if (num_chunks_in <= 0) |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 1286 | { |
John Bowler | e956751 | 2012-08-15 22:53:00 -0500 | [diff] [blame] | 1287 | png_ptr->unknown_default = keep; |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 1288 | |
John Bowler | e956751 | 2012-08-15 22:53:00 -0500 | [diff] [blame] | 1289 | /* '0' means just set the flags, so stop here */ |
Glenn Randers-Pehrson | 702053d | 2012-08-17 21:23:06 -0500 | [diff] [blame] | 1290 | if (num_chunks_in == 0) |
Glenn Randers-Pehrson | 96b9170 | 2012-06-16 13:26:28 -0500 | [diff] [blame] | 1291 | return; |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 1292 | } |
Glenn Randers-Pehrson | 62333ba | 2010-10-23 08:48:51 -0500 | [diff] [blame] | 1293 | |
Glenn Randers-Pehrson | 702053d | 2012-08-17 21:23:06 -0500 | [diff] [blame] | 1294 | if (num_chunks_in < 0) |
John Bowler | aa9dea5 | 2012-08-10 19:04:08 -0500 | [diff] [blame] | 1295 | { |
| 1296 | /* Ignore all unknown chunks and all chunks recognized by |
| 1297 | * libpng except for IHDR, PLTE, tRNS, IDAT, and IEND |
| 1298 | */ |
| 1299 | static PNG_CONST png_byte chunks_to_ignore[] = { |
| 1300 | 98, 75, 71, 68, '\0', /* bKGD */ |
| 1301 | 99, 72, 82, 77, '\0', /* cHRM */ |
| 1302 | 103, 65, 77, 65, '\0', /* gAMA */ |
| 1303 | 104, 73, 83, 84, '\0', /* hIST */ |
| 1304 | 105, 67, 67, 80, '\0', /* iCCP */ |
| 1305 | 105, 84, 88, 116, '\0', /* iTXt */ |
| 1306 | 111, 70, 70, 115, '\0', /* oFFs */ |
| 1307 | 112, 67, 65, 76, '\0', /* pCAL */ |
| 1308 | 112, 72, 89, 115, '\0', /* pHYs */ |
| 1309 | 115, 66, 73, 84, '\0', /* sBIT */ |
| 1310 | 115, 67, 65, 76, '\0', /* sCAL */ |
| 1311 | 115, 80, 76, 84, '\0', /* sPLT */ |
| 1312 | 115, 84, 69, 82, '\0', /* sTER */ |
| 1313 | 115, 82, 71, 66, '\0', /* sRGB */ |
| 1314 | 116, 69, 88, 116, '\0', /* tEXt */ |
| 1315 | 116, 73, 77, 69, '\0', /* tIME */ |
| 1316 | 122, 84, 88, 116, '\0' /* zTXt */ |
| 1317 | }; |
Glenn Randers-Pehrson | 96b9170 | 2012-06-16 13:26:28 -0500 | [diff] [blame] | 1318 | |
John Bowler | aa9dea5 | 2012-08-10 19:04:08 -0500 | [diff] [blame] | 1319 | chunk_list = chunks_to_ignore; |
| 1320 | num_chunks = (sizeof chunks_to_ignore)/5; |
| 1321 | } |
Glenn Randers-Pehrson | 96b9170 | 2012-06-16 13:26:28 -0500 | [diff] [blame] | 1322 | |
Glenn Randers-Pehrson | 702053d | 2012-08-17 21:23:06 -0500 | [diff] [blame] | 1323 | else /* num_chunks_in > 0 */ |
John Bowler | aa9dea5 | 2012-08-10 19:04:08 -0500 | [diff] [blame] | 1324 | { |
| 1325 | if (chunk_list == NULL) |
John Bowler | e956751 | 2012-08-15 22:53:00 -0500 | [diff] [blame] | 1326 | { |
| 1327 | /* Prior to 1.6.0 this was silently ignored, now it is an app_error |
| 1328 | * which can be switched off. |
| 1329 | */ |
| 1330 | png_app_error(png_ptr, "png_set_keep_unknown_chunks: no chunk list"); |
John Bowler | aa9dea5 | 2012-08-10 19:04:08 -0500 | [diff] [blame] | 1331 | return; |
John Bowler | e956751 | 2012-08-15 22:53:00 -0500 | [diff] [blame] | 1332 | } |
Glenn Randers-Pehrson | 62333ba | 2010-10-23 08:48:51 -0500 | [diff] [blame] | 1333 | |
Glenn Randers-Pehrson | 702053d | 2012-08-17 21:23:06 -0500 | [diff] [blame] | 1334 | num_chunks = num_chunks_in; |
John Bowler | aa9dea5 | 2012-08-10 19:04:08 -0500 | [diff] [blame] | 1335 | } |
John Bowler | fcd301d | 2011-12-28 21:34:27 -0600 | [diff] [blame] | 1336 | |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 1337 | old_num_chunks = png_ptr->num_chunk_list; |
John Bowler | e956751 | 2012-08-15 22:53:00 -0500 | [diff] [blame] | 1338 | if (png_ptr->chunk_list == NULL) |
| 1339 | old_num_chunks = 0; |
John Bowler | aa9dea5 | 2012-08-10 19:04:08 -0500 | [diff] [blame] | 1340 | |
| 1341 | /* Since num_chunks is always restricted to UINT_MAX/5 this can't overflow. |
| 1342 | */ |
| 1343 | if (num_chunks + old_num_chunks > UINT_MAX/5) |
| 1344 | { |
| 1345 | png_app_error(png_ptr, "png_set_keep_unknown_chunks: too many chunks"); |
| 1346 | return; |
| 1347 | } |
| 1348 | |
John Bowler | e956751 | 2012-08-15 22:53:00 -0500 | [diff] [blame] | 1349 | /* If these chunks are being reset to the default then no more memory is |
| 1350 | * required because add_one_chunk above doesn't extend the list if the 'keep' |
| 1351 | * parameter is the default. |
| 1352 | */ |
| 1353 | if (keep) |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 1354 | { |
John Bowler | e956751 | 2012-08-15 22:53:00 -0500 | [diff] [blame] | 1355 | new_list = png_voidcast(png_bytep, png_malloc(png_ptr, |
| 1356 | 5 * (num_chunks + old_num_chunks))); |
| 1357 | |
| 1358 | if (old_num_chunks > 0) |
| 1359 | memcpy(new_list, png_ptr->chunk_list, 5*old_num_chunks); |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 1360 | } |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 1361 | |
John Bowler | e956751 | 2012-08-15 22:53:00 -0500 | [diff] [blame] | 1362 | else if (old_num_chunks > 0) |
| 1363 | new_list = png_ptr->chunk_list; |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 1364 | |
John Bowler | e956751 | 2012-08-15 22:53:00 -0500 | [diff] [blame] | 1365 | else |
| 1366 | new_list = NULL; |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 1367 | |
John Bowler | e956751 | 2012-08-15 22:53:00 -0500 | [diff] [blame] | 1368 | /* Add the new chunks together with each one's handling code. If the chunk |
| 1369 | * already exists the code is updated, otherwise the chunk is added to the |
| 1370 | * end. (In libpng 1.6.0 order no longer matters because this code enforces |
| 1371 | * the earlier convention that the last setting is the one that is used.) |
| 1372 | */ |
| 1373 | if (new_list != NULL) |
| 1374 | { |
| 1375 | png_const_bytep inlist; |
| 1376 | png_bytep outlist; |
| 1377 | unsigned int i; |
| 1378 | |
| 1379 | for (i=0; i<num_chunks; ++i) |
| 1380 | old_num_chunks = add_one_chunk(new_list, old_num_chunks, |
| 1381 | chunk_list+5*i, keep); |
| 1382 | |
| 1383 | /* Now remove any spurious 'default' entries. */ |
| 1384 | num_chunks = 0; |
| 1385 | for (i=0, inlist=outlist=new_list; i<old_num_chunks; ++i, inlist += 5) |
| 1386 | if (inlist[4]) |
| 1387 | { |
| 1388 | if (outlist != inlist) |
| 1389 | memcpy(outlist, inlist, 5); |
| 1390 | outlist += 5; |
| 1391 | ++num_chunks; |
| 1392 | } |
| 1393 | |
| 1394 | /* This means the application has removed all the specialized handling. */ |
| 1395 | if (num_chunks == 0) |
| 1396 | { |
| 1397 | if (png_ptr->chunk_list != new_list) |
| 1398 | png_free(png_ptr, new_list); |
| 1399 | |
| 1400 | new_list = NULL; |
| 1401 | } |
| 1402 | } |
| 1403 | |
| 1404 | else |
| 1405 | num_chunks = 0; |
| 1406 | |
| 1407 | png_ptr->num_chunk_list = num_chunks; |
| 1408 | |
| 1409 | if (png_ptr->chunk_list != new_list) |
| 1410 | { |
| 1411 | if (png_ptr->chunk_list != NULL) |
| 1412 | png_free(png_ptr, png_ptr->chunk_list); |
| 1413 | |
| 1414 | png_ptr->chunk_list = new_list; |
| 1415 | } |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 1416 | } |
| 1417 | #endif |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1418 | |
Glenn Randers-Pehrson | e26c095 | 2009-09-23 11:22:08 -0500 | [diff] [blame] | 1419 | #ifdef PNG_READ_USER_CHUNKS_SUPPORTED |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 1420 | void PNGAPI |
John Bowler | 5d56786 | 2011-12-24 09:12:00 -0600 | [diff] [blame] | 1421 | png_set_read_user_chunk_fn(png_structrp png_ptr, png_voidp user_chunk_ptr, |
Glenn Randers-Pehrson | da30135 | 2010-03-06 06:42:48 -0600 | [diff] [blame] | 1422 | png_user_chunk_ptr read_user_chunk_fn) |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 1423 | { |
Glenn Randers-Pehrson | 51650b8 | 2008-08-05 07:44:42 -0500 | [diff] [blame] | 1424 | png_debug(1, "in png_set_read_user_chunk_fn"); |
Glenn Randers-Pehrson | da00980 | 2009-08-15 13:25:47 -0500 | [diff] [blame] | 1425 | |
Glenn Randers-Pehrson | 170b70c | 2006-03-10 10:19:04 -0600 | [diff] [blame] | 1426 | if (png_ptr == NULL) |
| 1427 | return; |
Glenn Randers-Pehrson | b3ce365 | 2009-08-15 21:47:03 -0500 | [diff] [blame] | 1428 | |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 1429 | png_ptr->read_user_chunk_fn = read_user_chunk_fn; |
| 1430 | png_ptr->user_chunk_ptr = user_chunk_ptr; |
| 1431 | } |
| 1432 | #endif |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1433 | |
Glenn Randers-Pehrson | e26c095 | 2009-09-23 11:22:08 -0500 | [diff] [blame] | 1434 | #ifdef PNG_INFO_IMAGE_SUPPORTED |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 1435 | void PNGAPI |
John Bowler | 4f67e40 | 2011-12-28 08:43:37 -0600 | [diff] [blame] | 1436 | png_set_rows(png_const_structrp png_ptr, png_inforp info_ptr, |
| 1437 | png_bytepp row_pointers) |
Glenn Randers-Pehrson | a77ef62 | 2000-02-18 13:48:52 -0600 | [diff] [blame] | 1438 | { |
Glenn Randers-Pehrson | 51650b8 | 2008-08-05 07:44:42 -0500 | [diff] [blame] | 1439 | png_debug1(1, "in %s storage function", "rows"); |
Glenn Randers-Pehrson | fc4a143 | 2000-05-17 17:39:34 -0500 | [diff] [blame] | 1440 | |
Glenn Randers-Pehrson | a77ef62 | 2000-02-18 13:48:52 -0600 | [diff] [blame] | 1441 | if (png_ptr == NULL || info_ptr == NULL) |
| 1442 | return; |
| 1443 | |
Glenn Randers-Pehrson | 145f5c8 | 2008-07-10 09:13:13 -0500 | [diff] [blame] | 1444 | if (info_ptr->row_pointers && (info_ptr->row_pointers != row_pointers)) |
Glenn Randers-Pehrson | 4accabb | 2000-04-14 14:20:47 -0500 | [diff] [blame] | 1445 | png_free_data(png_ptr, info_ptr, PNG_FREE_ROWS, 0); |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 1446 | |
Glenn Randers-Pehrson | fc4a143 | 2000-05-17 17:39:34 -0500 | [diff] [blame] | 1447 | info_ptr->row_pointers = row_pointers; |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 1448 | |
Glenn Randers-Pehrson | 145f5c8 | 2008-07-10 09:13:13 -0500 | [diff] [blame] | 1449 | if (row_pointers) |
Glenn Randers-Pehrson | fc4a143 | 2000-05-17 17:39:34 -0500 | [diff] [blame] | 1450 | info_ptr->valid |= PNG_INFO_IDAT; |
Glenn Randers-Pehrson | a77ef62 | 2000-02-18 13:48:52 -0600 | [diff] [blame] | 1451 | } |
| 1452 | #endif |
| 1453 | |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 1454 | void PNGAPI |
John Bowler | 5d56786 | 2011-12-24 09:12:00 -0600 | [diff] [blame] | 1455 | png_set_compression_buffer_size(png_structrp png_ptr, png_size_t size) |
Glenn Randers-Pehrson | 228bd39 | 2000-04-23 23:14:02 -0500 | [diff] [blame] | 1456 | { |
Glenn Randers-Pehrson | 170b70c | 2006-03-10 10:19:04 -0600 | [diff] [blame] | 1457 | if (png_ptr == NULL) |
| 1458 | return; |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 1459 | |
John Bowler | b5d0051 | 2012-03-09 09:15:18 -0600 | [diff] [blame] | 1460 | if (size == 0 || size > PNG_UINT_31_MAX) |
| 1461 | png_error(png_ptr, "invalid compression buffer size"); |
Glenn Randers-Pehrson | 62333ba | 2010-10-23 08:48:51 -0500 | [diff] [blame] | 1462 | |
John Bowler | b5d0051 | 2012-03-09 09:15:18 -0600 | [diff] [blame] | 1463 | # ifdef PNG_SEQUENTIAL_READ_SUPPORTED |
| 1464 | if (png_ptr->mode & PNG_IS_READ_STRUCT) |
| 1465 | { |
| 1466 | png_ptr->IDAT_read_size = (png_uint_32)size; /* checked above */ |
| 1467 | return; |
| 1468 | } |
| 1469 | # endif |
Glenn Randers-Pehrson | 62333ba | 2010-10-23 08:48:51 -0500 | [diff] [blame] | 1470 | |
John Bowler | 134c576 | 2012-08-10 10:46:45 -0500 | [diff] [blame] | 1471 | # ifdef PNG_WRITE_SUPPORTED |
John Bowler | b5d0051 | 2012-03-09 09:15:18 -0600 | [diff] [blame] | 1472 | if (!(png_ptr->mode & PNG_IS_READ_STRUCT)) |
| 1473 | { |
| 1474 | if (png_ptr->zowner != 0) |
| 1475 | { |
| 1476 | png_warning(png_ptr, |
| 1477 | "Compression buffer size cannot be changed because it is in use"); |
| 1478 | return; |
| 1479 | } |
John Bowler | aa9dea5 | 2012-08-10 19:04:08 -0500 | [diff] [blame] | 1480 | |
John Bowler | b5d0051 | 2012-03-09 09:15:18 -0600 | [diff] [blame] | 1481 | if (size > ZLIB_IO_MAX) |
| 1482 | { |
| 1483 | png_warning(png_ptr, |
| 1484 | "Compression buffer size limited to system maximum"); |
| 1485 | size = ZLIB_IO_MAX; /* must fit */ |
| 1486 | } |
John Bowler | aa9dea5 | 2012-08-10 19:04:08 -0500 | [diff] [blame] | 1487 | |
John Bowler | b5d0051 | 2012-03-09 09:15:18 -0600 | [diff] [blame] | 1488 | else if (size < 6) |
| 1489 | { |
| 1490 | /* Deflate will potentially go into an infinite loop on a SYNC_FLUSH |
| 1491 | * if this is permitted. |
| 1492 | */ |
| 1493 | png_warning(png_ptr, |
| 1494 | "Compression buffer size cannot be reduced below 6"); |
| 1495 | return; |
| 1496 | } |
John Bowler | aa9dea5 | 2012-08-10 19:04:08 -0500 | [diff] [blame] | 1497 | |
John Bowler | b5d0051 | 2012-03-09 09:15:18 -0600 | [diff] [blame] | 1498 | if (png_ptr->zbuffer_size != size) |
| 1499 | { |
| 1500 | png_free_buffer_list(png_ptr, &png_ptr->zbuffer_list); |
| 1501 | png_ptr->zbuffer_size = (uInt)size; |
| 1502 | } |
| 1503 | } |
| 1504 | # endif |
Glenn Randers-Pehrson | 228bd39 | 2000-04-23 23:14:02 -0500 | [diff] [blame] | 1505 | } |
Glenn Randers-Pehrson | fc4a143 | 2000-05-17 17:39:34 -0500 | [diff] [blame] | 1506 | |
| 1507 | void PNGAPI |
John Bowler | 5d56786 | 2011-12-24 09:12:00 -0600 | [diff] [blame] | 1508 | png_set_invalid(png_const_structrp png_ptr, png_inforp info_ptr, int mask) |
Glenn Randers-Pehrson | fc4a143 | 2000-05-17 17:39:34 -0500 | [diff] [blame] | 1509 | { |
| 1510 | if (png_ptr && info_ptr) |
Glenn Randers-Pehrson | 145f5c8 | 2008-07-10 09:13:13 -0500 | [diff] [blame] | 1511 | info_ptr->valid &= ~mask; |
Glenn Randers-Pehrson | fc4a143 | 2000-05-17 17:39:34 -0500 | [diff] [blame] | 1512 | } |
Glenn Randers-Pehrson | 231e687 | 2001-01-12 15:13:06 -0600 | [diff] [blame] | 1513 | |
Glenn Randers-Pehrson | e68f5a3 | 2001-05-14 09:20:53 -0500 | [diff] [blame] | 1514 | |
Glenn Randers-Pehrson | 272489d | 2004-08-04 06:34:52 -0500 | [diff] [blame] | 1515 | #ifdef PNG_SET_USER_LIMITS_SUPPORTED |
Glenn Randers-Pehrson | 4bb4d01 | 2009-05-20 12:45:29 -0500 | [diff] [blame] | 1516 | /* This function was added to libpng 1.2.6 */ |
Glenn Randers-Pehrson | 272489d | 2004-08-04 06:34:52 -0500 | [diff] [blame] | 1517 | void PNGAPI |
John Bowler | 5d56786 | 2011-12-24 09:12:00 -0600 | [diff] [blame] | 1518 | png_set_user_limits (png_structrp png_ptr, png_uint_32 user_width_max, |
Glenn Randers-Pehrson | 272489d | 2004-08-04 06:34:52 -0500 | [diff] [blame] | 1519 | png_uint_32 user_height_max) |
| 1520 | { |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 1521 | /* Images with dimensions larger than these limits will be |
| 1522 | * rejected by png_set_IHDR(). To accept any PNG datastream |
| 1523 | * regardless of dimensions, set both limits to 0x7ffffffL. |
| 1524 | */ |
| 1525 | if (png_ptr == NULL) |
| 1526 | return; |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 1527 | |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 1528 | png_ptr->user_width_max = user_width_max; |
| 1529 | png_ptr->user_height_max = user_height_max; |
Glenn Randers-Pehrson | 272489d | 2004-08-04 06:34:52 -0500 | [diff] [blame] | 1530 | } |
Glenn Randers-Pehrson | e3f3c4e | 2010-02-07 18:08:50 -0600 | [diff] [blame] | 1531 | |
Glenn Randers-Pehrson | 17ca340 | 2009-11-09 06:51:16 -0600 | [diff] [blame] | 1532 | /* This function was added to libpng 1.4.0 */ |
Glenn Randers-Pehrson | 800d1e9 | 2008-08-20 17:25:21 -0500 | [diff] [blame] | 1533 | void PNGAPI |
John Bowler | 4f67e40 | 2011-12-28 08:43:37 -0600 | [diff] [blame] | 1534 | png_set_chunk_cache_max (png_structrp png_ptr, png_uint_32 user_chunk_cache_max) |
Glenn Randers-Pehrson | 800d1e9 | 2008-08-20 17:25:21 -0500 | [diff] [blame] | 1535 | { |
Glenn Randers-Pehrson | e3f3c4e | 2010-02-07 18:08:50 -0600 | [diff] [blame] | 1536 | if (png_ptr) |
John Bowler | 2414bd9 | 2013-01-19 23:18:59 -0600 | [diff] [blame^] | 1537 | png_ptr->user_chunk_cache_max = user_chunk_cache_max; |
Glenn Randers-Pehrson | e3f3c4e | 2010-02-07 18:08:50 -0600 | [diff] [blame] | 1538 | } |
| 1539 | |
| 1540 | /* This function was added to libpng 1.4.1 */ |
| 1541 | void PNGAPI |
John Bowler | 5d56786 | 2011-12-24 09:12:00 -0600 | [diff] [blame] | 1542 | png_set_chunk_malloc_max (png_structrp png_ptr, |
Glenn Randers-Pehrson | 62333ba | 2010-10-23 08:48:51 -0500 | [diff] [blame] | 1543 | png_alloc_size_t user_chunk_malloc_max) |
Glenn Randers-Pehrson | e3f3c4e | 2010-02-07 18:08:50 -0600 | [diff] [blame] | 1544 | { |
Glenn Randers-Pehrson | 62333ba | 2010-10-23 08:48:51 -0500 | [diff] [blame] | 1545 | if (png_ptr) |
| 1546 | png_ptr->user_chunk_malloc_max = user_chunk_malloc_max; |
Glenn Randers-Pehrson | 800d1e9 | 2008-08-20 17:25:21 -0500 | [diff] [blame] | 1547 | } |
Glenn Randers-Pehrson | 272489d | 2004-08-04 06:34:52 -0500 | [diff] [blame] | 1548 | #endif /* ?PNG_SET_USER_LIMITS_SUPPORTED */ |
| 1549 | |
Glenn Randers-Pehrson | 6bc53be | 2006-06-16 07:52:03 -0500 | [diff] [blame] | 1550 | |
Glenn Randers-Pehrson | e26c095 | 2009-09-23 11:22:08 -0500 | [diff] [blame] | 1551 | #ifdef PNG_BENIGN_ERRORS_SUPPORTED |
Glenn Randers-Pehrson | 6bc53be | 2006-06-16 07:52:03 -0500 | [diff] [blame] | 1552 | void PNGAPI |
John Bowler | 5d56786 | 2011-12-24 09:12:00 -0600 | [diff] [blame] | 1553 | png_set_benign_errors(png_structrp png_ptr, int allowed) |
Glenn Randers-Pehrson | 6bc53be | 2006-06-16 07:52:03 -0500 | [diff] [blame] | 1554 | { |
Glenn Randers-Pehrson | 51650b8 | 2008-08-05 07:44:42 -0500 | [diff] [blame] | 1555 | png_debug(1, "in png_set_benign_errors"); |
Glenn Randers-Pehrson | da00980 | 2009-08-15 13:25:47 -0500 | [diff] [blame] | 1556 | |
Glenn Randers-Pehrson | dd6ecbe | 2012-03-16 07:33:38 -0500 | [diff] [blame] | 1557 | /* If allowed is 1, png_benign_error() is treated as a warning. |
| 1558 | * |
| 1559 | * If allowed is 0, png_benign_error() is treated as an error (which |
| 1560 | * is the default behavior if png_set_benign_errors() is not called). |
| 1561 | */ |
| 1562 | |
Glenn Randers-Pehrson | 6bc53be | 2006-06-16 07:52:03 -0500 | [diff] [blame] | 1563 | if (allowed) |
Glenn Randers-Pehrson | ce9d8a3 | 2012-03-18 22:39:52 -0500 | [diff] [blame] | 1564 | png_ptr->flags |= PNG_FLAG_BENIGN_ERRORS_WARN | |
| 1565 | PNG_FLAG_APP_WARNINGS_WARN | PNG_FLAG_APP_ERRORS_WARN; |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 1566 | |
Glenn Randers-Pehrson | 6bc53be | 2006-06-16 07:52:03 -0500 | [diff] [blame] | 1567 | else |
Glenn Randers-Pehrson | ce9d8a3 | 2012-03-18 22:39:52 -0500 | [diff] [blame] | 1568 | png_ptr->flags &= ~(PNG_FLAG_BENIGN_ERRORS_WARN | |
| 1569 | PNG_FLAG_APP_WARNINGS_WARN | PNG_FLAG_APP_ERRORS_WARN); |
Glenn Randers-Pehrson | 6bc53be | 2006-06-16 07:52:03 -0500 | [diff] [blame] | 1570 | } |
| 1571 | #endif /* PNG_BENIGN_ERRORS_SUPPORTED */ |
Glenn Randers-Pehrson | eeb1bb6 | 2012-03-02 22:10:15 -0600 | [diff] [blame] | 1572 | |
Glenn Randers-Pehrson | e243a1f | 2012-04-13 12:35:21 -0500 | [diff] [blame] | 1573 | #ifdef PNG_CHECK_FOR_INVALID_INDEX_SUPPORTED |
Glenn Randers-Pehrson | 6dae6d8 | 2012-11-25 12:40:13 -0600 | [diff] [blame] | 1574 | /* Whether to report invalid palette index; added at libng-1.5.10. |
| 1575 | * It is possible for an indexed (color-type==3) PNG file to contain |
| 1576 | * pixels with invalid (out-of-range) indexes if the PLTE chunk has |
| 1577 | * fewer entries than the image's bit-depth would allow. We recover |
| 1578 | * from this gracefully by filling any incomplete palette with zeroes |
| 1579 | * (opaque black). By default, when this occurs libpng will issue |
| 1580 | * a benign error. This API can be used to override that behavior. |
| 1581 | */ |
Glenn Randers-Pehrson | eeb1bb6 | 2012-03-02 22:10:15 -0600 | [diff] [blame] | 1582 | void PNGAPI |
| 1583 | png_set_check_for_invalid_index(png_structrp png_ptr, int allowed) |
| 1584 | { |
| 1585 | png_debug(1, "in png_set_check_for_invalid_index"); |
| 1586 | |
Glenn Randers-Pehrson | 945cb1f | 2012-03-10 08:48:04 -0600 | [diff] [blame] | 1587 | if (allowed > 0) |
Glenn Randers-Pehrson | eeb1bb6 | 2012-03-02 22:10:15 -0600 | [diff] [blame] | 1588 | png_ptr->num_palette_max = 0; |
| 1589 | |
| 1590 | else |
| 1591 | png_ptr->num_palette_max = -1; |
| 1592 | } |
Glenn Randers-Pehrson | eeb1bb6 | 2012-03-02 22:10:15 -0600 | [diff] [blame] | 1593 | #endif |
Glenn Randers-Pehrson | 9c3ab68 | 2006-02-20 22:09:05 -0600 | [diff] [blame] | 1594 | #endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */ |