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 | * |
Cosmin Truta | a873893 | 2018-07-28 18:47:21 -0400 | [diff] [blame] | 4 | * Copyright (c) 2018 Cosmin Truta |
Cosmin Truta | 46aedd8 | 2018-07-15 23:58:00 -0400 | [diff] [blame] | 5 | * Copyright (c) 1998-2018 Glenn Randers-Pehrson |
Cosmin Truta | a873893 | 2018-07-28 18:47:21 -0400 | [diff] [blame] | 6 | * Copyright (c) 1996-1997 Andreas Dilger |
| 7 | * 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 | { |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [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 | |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [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, |
Glenn Randers-Pehrson | 5d713fe | 2014-10-31 20:48:55 -0500 | [diff] [blame] | 62 | 2/* override with app values*/) != 0) |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 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 | 871b1d0 | 2013-03-02 14:58:22 -0600 | [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 | |
Glenn Randers-Pehrson | 5d713fe | 2014-10-31 20:48:55 -0500 | [diff] [blame] | 93 | if (png_colorspace_set_endpoints(png_ptr, &info_ptr->colorspace, |
| 94 | &XYZ, 2) != 0) |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 95 | info_ptr->colorspace.flags |= PNG_COLORSPACE_FROM_cHRM; |
John Bowler | 736f40f | 2011-08-25 16:19:44 -0500 | [diff] [blame] | 96 | |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 97 | png_colorspace_sync_info(png_ptr, info_ptr); |
John Bowler | 736f40f | 2011-08-25 16:19:44 -0500 | [diff] [blame] | 98 | } |
| 99 | |
Glenn Randers-Pehrson | 62333ba | 2010-10-23 08:48:51 -0500 | [diff] [blame] | 100 | # ifdef PNG_FLOATING_POINT_SUPPORTED |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 101 | void PNGAPI |
John Bowler | 4f67e40 | 2011-12-28 08:43:37 -0600 | [diff] [blame] | 102 | 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] | 103 | double white_x, double white_y, double red_x, double red_y, |
| 104 | double green_x, double green_y, double blue_x, double blue_y) |
| 105 | { |
| 106 | png_set_cHRM_fixed(png_ptr, info_ptr, |
Glenn Randers-Pehrson | dd70604 | 2016-07-15 11:20:46 -0500 | [diff] [blame] | 107 | png_fixed(png_ptr, white_x, "cHRM White X"), |
| 108 | png_fixed(png_ptr, white_y, "cHRM White Y"), |
| 109 | png_fixed(png_ptr, red_x, "cHRM Red X"), |
| 110 | png_fixed(png_ptr, red_y, "cHRM Red Y"), |
| 111 | png_fixed(png_ptr, green_x, "cHRM Green X"), |
| 112 | png_fixed(png_ptr, green_y, "cHRM Green Y"), |
| 113 | png_fixed(png_ptr, blue_x, "cHRM Blue X"), |
| 114 | png_fixed(png_ptr, blue_y, "cHRM Blue Y")); |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 115 | } |
John Bowler | 736f40f | 2011-08-25 16:19:44 -0500 | [diff] [blame] | 116 | |
| 117 | void PNGAPI |
John Bowler | 4f67e40 | 2011-12-28 08:43:37 -0600 | [diff] [blame] | 118 | 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] | 119 | double red_Y, double red_Z, double green_X, double green_Y, double green_Z, |
| 120 | double blue_X, double blue_Y, double blue_Z) |
| 121 | { |
| 122 | png_set_cHRM_XYZ_fixed(png_ptr, info_ptr, |
Glenn Randers-Pehrson | dd70604 | 2016-07-15 11:20:46 -0500 | [diff] [blame] | 123 | png_fixed(png_ptr, red_X, "cHRM Red X"), |
| 124 | png_fixed(png_ptr, red_Y, "cHRM Red Y"), |
| 125 | png_fixed(png_ptr, red_Z, "cHRM Red Z"), |
| 126 | png_fixed(png_ptr, green_X, "cHRM Green X"), |
| 127 | png_fixed(png_ptr, green_Y, "cHRM Green Y"), |
| 128 | png_fixed(png_ptr, green_Z, "cHRM Green Z"), |
| 129 | png_fixed(png_ptr, blue_X, "cHRM Blue X"), |
| 130 | png_fixed(png_ptr, blue_Y, "cHRM Blue Y"), |
| 131 | png_fixed(png_ptr, blue_Z, "cHRM Blue Z")); |
John Bowler | 736f40f | 2011-08-25 16:19:44 -0500 | [diff] [blame] | 132 | } |
Glenn Randers-Pehrson | cda68df | 2014-11-06 22:11:39 -0600 | [diff] [blame] | 133 | # endif /* FLOATING_POINT */ |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 134 | |
Glenn Randers-Pehrson | cda68df | 2014-11-06 22:11:39 -0600 | [diff] [blame] | 135 | #endif /* cHRM */ |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 136 | |
Glenn Randers-Pehrson | 68cb0aa | 2017-07-13 11:19:53 -0500 | [diff] [blame] | 137 | #ifdef PNG_eXIf_SUPPORTED |
| 138 | void PNGAPI |
Glenn Randers-Pehrson | 7c709f0 | 2017-08-02 16:48:11 -0500 | [diff] [blame] | 139 | png_set_eXIf(png_const_structrp png_ptr, png_inforp info_ptr, |
Cosmin Truta | ceb3277 | 2018-08-18 22:47:16 -0400 | [diff] [blame] | 140 | png_bytep eXIf_buf) |
Glenn Randers-Pehrson | 7c709f0 | 2017-08-02 16:48:11 -0500 | [diff] [blame] | 141 | { |
Glenn Randers-Pehrson | d930d36 | 2017-08-03 10:29:10 -0500 | [diff] [blame] | 142 | png_warning(png_ptr, "png_set_eXIf does not work; use png_set_eXIf_1"); |
| 143 | PNG_UNUSED(info_ptr) |
| 144 | PNG_UNUSED(eXIf_buf) |
| 145 | } |
| 146 | |
| 147 | void PNGAPI |
| 148 | png_set_eXIf_1(png_const_structrp png_ptr, png_inforp info_ptr, |
Cosmin Truta | ceb3277 | 2018-08-18 22:47:16 -0400 | [diff] [blame] | 149 | png_uint_32 num_exif, png_bytep eXIf_buf) |
Glenn Randers-Pehrson | d930d36 | 2017-08-03 10:29:10 -0500 | [diff] [blame] | 150 | { |
Glenn Randers-Pehrson | 68cb0aa | 2017-07-13 11:19:53 -0500 | [diff] [blame] | 151 | int i; |
| 152 | |
| 153 | png_debug1(1, "in %s storage function", "eXIf"); |
| 154 | |
| 155 | if (png_ptr == NULL || info_ptr == NULL) |
| 156 | return; |
| 157 | |
Glenn Randers-Pehrson | 71a5618 | 2017-08-01 21:42:16 -0500 | [diff] [blame] | 158 | if (info_ptr->exif) |
| 159 | { |
| 160 | png_free(png_ptr, info_ptr->exif); |
| 161 | info_ptr->exif = NULL; |
| 162 | } |
Glenn Randers-Pehrson | 68cb0aa | 2017-07-13 11:19:53 -0500 | [diff] [blame] | 163 | |
Glenn Randers-Pehrson | d930d36 | 2017-08-03 10:29:10 -0500 | [diff] [blame] | 164 | info_ptr->num_exif = num_exif; |
Glenn Randers-Pehrson | 40afb68 | 2017-07-31 14:20:40 -0500 | [diff] [blame] | 165 | |
Glenn Randers-Pehrson | 68cb0aa | 2017-07-13 11:19:53 -0500 | [diff] [blame] | 166 | info_ptr->exif = png_voidcast(png_bytep, png_malloc_warn(png_ptr, |
| 167 | info_ptr->num_exif)); |
| 168 | |
| 169 | if (info_ptr->exif == NULL) |
| 170 | { |
| 171 | png_warning(png_ptr, "Insufficient memory for eXIf chunk data"); |
Glenn Randers-Pehrson | 68cb0aa | 2017-07-13 11:19:53 -0500 | [diff] [blame] | 172 | return; |
| 173 | } |
| 174 | |
| 175 | info_ptr->free_me |= PNG_FREE_EXIF; |
| 176 | |
Glenn Randers-Pehrson | 3fa1df4 | 2017-08-02 17:27:41 -0500 | [diff] [blame] | 177 | for (i = 0; i < (int) info_ptr->num_exif; i++) |
Glenn Randers-Pehrson | 68cb0aa | 2017-07-13 11:19:53 -0500 | [diff] [blame] | 178 | info_ptr->exif[i] = eXIf_buf[i]; |
| 179 | |
| 180 | info_ptr->valid |= PNG_INFO_eXIf; |
| 181 | } |
| 182 | #endif /* eXIf */ |
| 183 | |
Glenn Randers-Pehrson | e26c095 | 2009-09-23 11:22:08 -0500 | [diff] [blame] | 184 | #ifdef PNG_gAMA_SUPPORTED |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 185 | void PNGFAPI |
John Bowler | 4f67e40 | 2011-12-28 08:43:37 -0600 | [diff] [blame] | 186 | png_set_gAMA_fixed(png_const_structrp png_ptr, png_inforp info_ptr, |
| 187 | png_fixed_point file_gamma) |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 188 | { |
| 189 | png_debug1(1, "in %s storage function", "gAMA"); |
| 190 | |
| 191 | if (png_ptr == NULL || info_ptr == NULL) |
| 192 | return; |
| 193 | |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 194 | png_colorspace_set_gamma(png_ptr, &info_ptr->colorspace, file_gamma); |
| 195 | png_colorspace_sync_info(png_ptr, info_ptr); |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 196 | } |
| 197 | |
Glenn Randers-Pehrson | 62333ba | 2010-10-23 08:48:51 -0500 | [diff] [blame] | 198 | # ifdef PNG_FLOATING_POINT_SUPPORTED |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 199 | void PNGAPI |
John Bowler | 4f67e40 | 2011-12-28 08:43:37 -0600 | [diff] [blame] | 200 | 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] | 201 | { |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 202 | 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] | 203 | "png_set_gAMA")); |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 204 | } |
Glenn Randers-Pehrson | 62333ba | 2010-10-23 08:48:51 -0500 | [diff] [blame] | 205 | # endif |
Glenn Randers-Pehrson | a272d8f | 2010-06-25 21:45:31 -0500 | [diff] [blame] | 206 | #endif |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 207 | |
Glenn Randers-Pehrson | e26c095 | 2009-09-23 11:22:08 -0500 | [diff] [blame] | 208 | #ifdef PNG_hIST_SUPPORTED |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 209 | void PNGAPI |
John Bowler | 4f67e40 | 2011-12-28 08:43:37 -0600 | [diff] [blame] | 210 | png_set_hIST(png_const_structrp png_ptr, png_inforp info_ptr, |
| 211 | png_const_uint_16p hist) |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 212 | { |
Glenn Randers-Pehrson | d1e8c86 | 2002-06-20 06:54:34 -0500 | [diff] [blame] | 213 | int i; |
Glenn Randers-Pehrson | 76e5fd6 | 2000-12-28 07:50:05 -0600 | [diff] [blame] | 214 | |
Glenn Randers-Pehrson | 51650b8 | 2008-08-05 07:44:42 -0500 | [diff] [blame] | 215 | png_debug1(1, "in %s storage function", "hIST"); |
Glenn Randers-Pehrson | da00980 | 2009-08-15 13:25:47 -0500 | [diff] [blame] | 216 | |
Glenn Randers-Pehrson | a357b99 | 1998-02-08 20:56:40 -0600 | [diff] [blame] | 217 | if (png_ptr == NULL || info_ptr == NULL) |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 218 | return; |
Glenn Randers-Pehrson | b3ce365 | 2009-08-15 21:47:03 -0500 | [diff] [blame] | 219 | |
Glenn Randers-Pehrson | 145f5c8 | 2008-07-10 09:13:13 -0500 | [diff] [blame] | 220 | if (info_ptr->num_palette == 0 || info_ptr->num_palette |
Glenn Randers-Pehrson | 9c3ab68 | 2006-02-20 22:09:05 -0600 | [diff] [blame] | 221 | > PNG_MAX_PALETTE_LENGTH) |
Glenn Randers-Pehrson | 3097f61 | 2001-05-07 14:52:45 -0500 | [diff] [blame] | 222 | { |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 223 | png_warning(png_ptr, |
Glenn Randers-Pehrson | da30135 | 2010-03-06 06:42:48 -0600 | [diff] [blame] | 224 | "Invalid palette size, hIST allocation skipped"); |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 225 | |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 226 | return; |
Glenn Randers-Pehrson | 3097f61 | 2001-05-07 14:52:45 -0500 | [diff] [blame] | 227 | } |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 228 | |
Glenn Randers-Pehrson | 76e5fd6 | 2000-12-28 07:50:05 -0600 | [diff] [blame] | 229 | png_free_data(png_ptr, info_ptr, PNG_FREE_HIST, 0); |
Glenn Randers-Pehrson | 62333ba | 2010-10-23 08:48:51 -0500 | [diff] [blame] | 230 | |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 231 | /* Changed from info->num_palette to PNG_MAX_PALETTE_LENGTH in |
| 232 | * version 1.2.1 |
| 233 | */ |
John Bowler | 4f67e40 | 2011-12-28 08:43:37 -0600 | [diff] [blame] | 234 | info_ptr->hist = png_voidcast(png_uint_16p, png_malloc_warn(png_ptr, |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 235 | PNG_MAX_PALETTE_LENGTH * (sizeof (png_uint_16)))); |
Glenn Randers-Pehrson | 62333ba | 2010-10-23 08:48:51 -0500 | [diff] [blame] | 236 | |
John Bowler | 4f67e40 | 2011-12-28 08:43:37 -0600 | [diff] [blame] | 237 | if (info_ptr->hist == NULL) |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 238 | { |
| 239 | png_warning(png_ptr, "Insufficient memory for hIST chunk data"); |
Glenn Randers-Pehrson | bd76965 | 2015-01-27 06:53:56 -0600 | [diff] [blame] | 240 | |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 241 | return; |
| 242 | } |
Glenn Randers-Pehrson | 76e5fd6 | 2000-12-28 07:50:05 -0600 | [diff] [blame] | 243 | |
Glenn Randers-Pehrson | 76e5fd6 | 2000-12-28 07:50:05 -0600 | [diff] [blame] | 244 | info_ptr->free_me |= PNG_FREE_HIST; |
John Bowler | 4f67e40 | 2011-12-28 08:43:37 -0600 | [diff] [blame] | 245 | |
| 246 | for (i = 0; i < info_ptr->num_palette; i++) |
| 247 | info_ptr->hist[i] = hist[i]; |
| 248 | |
| 249 | info_ptr->valid |= PNG_INFO_hIST; |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 250 | } |
| 251 | #endif |
| 252 | |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 253 | void PNGAPI |
John Bowler | 4f67e40 | 2011-12-28 08:43:37 -0600 | [diff] [blame] | 254 | 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] | 255 | png_uint_32 width, png_uint_32 height, int bit_depth, |
| 256 | int color_type, int interlace_type, int compression_type, |
| 257 | int filter_type) |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 258 | { |
Glenn Randers-Pehrson | 51650b8 | 2008-08-05 07:44:42 -0500 | [diff] [blame] | 259 | png_debug1(1, "in %s storage function", "IHDR"); |
Glenn Randers-Pehrson | da00980 | 2009-08-15 13:25:47 -0500 | [diff] [blame] | 260 | |
Glenn Randers-Pehrson | a357b99 | 1998-02-08 20:56:40 -0600 | [diff] [blame] | 261 | if (png_ptr == NULL || info_ptr == NULL) |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 262 | return; |
| 263 | |
| 264 | info_ptr->width = width; |
| 265 | info_ptr->height = height; |
| 266 | info_ptr->bit_depth = (png_byte)bit_depth; |
Glenn Randers-Pehrson | b35a745 | 2009-09-30 23:12:13 -0500 | [diff] [blame] | 267 | info_ptr->color_type = (png_byte)color_type; |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 268 | info_ptr->compression_type = (png_byte)compression_type; |
| 269 | info_ptr->filter_type = (png_byte)filter_type; |
| 270 | info_ptr->interlace_type = (png_byte)interlace_type; |
Glenn Randers-Pehrson | b35a745 | 2009-09-30 23:12:13 -0500 | [diff] [blame] | 271 | |
| 272 | png_check_IHDR (png_ptr, info_ptr->width, info_ptr->height, |
| 273 | info_ptr->bit_depth, info_ptr->color_type, info_ptr->interlace_type, |
| 274 | info_ptr->compression_type, info_ptr->filter_type); |
| 275 | |
Glenn Randers-Pehrson | 25d8224 | 2002-05-01 11:51:26 -0500 | [diff] [blame] | 276 | if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE) |
| 277 | info_ptr->channels = 1; |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 278 | |
Glenn Randers-Pehrson | 5d713fe | 2014-10-31 20:48:55 -0500 | [diff] [blame] | 279 | else if ((info_ptr->color_type & PNG_COLOR_MASK_COLOR) != 0) |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 280 | info_ptr->channels = 3; |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 281 | |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 282 | else |
| 283 | info_ptr->channels = 1; |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 284 | |
Glenn Randers-Pehrson | 5d713fe | 2014-10-31 20:48:55 -0500 | [diff] [blame] | 285 | if ((info_ptr->color_type & PNG_COLOR_MASK_ALPHA) != 0) |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 286 | info_ptr->channels++; |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 287 | |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 288 | 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] | 289 | |
Glenn Randers-Pehrson | 421f95d | 2013-06-04 15:05:12 -0500 | [diff] [blame] | 290 | info_ptr->rowbytes = PNG_ROWBYTES(info_ptr->pixel_depth, width); |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 291 | } |
| 292 | |
Glenn Randers-Pehrson | e26c095 | 2009-09-23 11:22:08 -0500 | [diff] [blame] | 293 | #ifdef PNG_oFFs_SUPPORTED |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 294 | void PNGAPI |
John Bowler | 4f67e40 | 2011-12-28 08:43:37 -0600 | [diff] [blame] | 295 | 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] | 296 | 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] | 297 | { |
Glenn Randers-Pehrson | 51650b8 | 2008-08-05 07:44:42 -0500 | [diff] [blame] | 298 | png_debug1(1, "in %s storage function", "oFFs"); |
Glenn Randers-Pehrson | da00980 | 2009-08-15 13:25:47 -0500 | [diff] [blame] | 299 | |
Glenn Randers-Pehrson | a357b99 | 1998-02-08 20:56:40 -0600 | [diff] [blame] | 300 | if (png_ptr == NULL || info_ptr == NULL) |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 301 | return; |
| 302 | |
| 303 | info_ptr->x_offset = offset_x; |
| 304 | info_ptr->y_offset = offset_y; |
| 305 | info_ptr->offset_unit_type = (png_byte)unit_type; |
| 306 | info_ptr->valid |= PNG_INFO_oFFs; |
| 307 | } |
| 308 | #endif |
| 309 | |
Glenn Randers-Pehrson | e26c095 | 2009-09-23 11:22:08 -0500 | [diff] [blame] | 310 | #ifdef PNG_pCAL_SUPPORTED |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 311 | void PNGAPI |
John Bowler | 4f67e40 | 2011-12-28 08:43:37 -0600 | [diff] [blame] | 312 | 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] | 313 | png_const_charp purpose, png_int_32 X0, png_int_32 X1, int type, |
| 314 | int nparams, png_const_charp units, png_charpp params) |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 315 | { |
Cosmin Truta | a74aa9a | 2018-06-17 22:37:44 -0400 | [diff] [blame] | 316 | size_t length; |
Glenn Randers-Pehrson | a357b99 | 1998-02-08 20:56:40 -0600 | [diff] [blame] | 317 | int i; |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 318 | |
Glenn Randers-Pehrson | 51650b8 | 2008-08-05 07:44:42 -0500 | [diff] [blame] | 319 | png_debug1(1, "in %s storage function", "pCAL"); |
Glenn Randers-Pehrson | da00980 | 2009-08-15 13:25:47 -0500 | [diff] [blame] | 320 | |
John Bowler | fcd301d | 2011-12-28 21:34:27 -0600 | [diff] [blame] | 321 | if (png_ptr == NULL || info_ptr == NULL || purpose == NULL || units == NULL |
Glenn Randers-Pehrson | bd76965 | 2015-01-27 06:53:56 -0600 | [diff] [blame] | 322 | || (nparams > 0 && params == NULL)) |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 323 | return; |
| 324 | |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 325 | length = strlen(purpose) + 1; |
Glenn Randers-Pehrson | 51650b8 | 2008-08-05 07:44:42 -0500 | [diff] [blame] | 326 | png_debug1(3, "allocating purpose for info (%lu bytes)", |
Glenn Randers-Pehrson | da30135 | 2010-03-06 06:42:48 -0600 | [diff] [blame] | 327 | (unsigned long)length); |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 328 | |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 329 | /* TODO: validate format of calibration name and unit name */ |
| 330 | |
| 331 | /* Check that the type matches the specification. */ |
| 332 | if (type < 0 || type > 3) |
John Bowler | 7dc0329 | 2016-09-02 19:26:42 -0700 | [diff] [blame] | 333 | { |
| 334 | png_chunk_report(png_ptr, "Invalid pCAL equation type", |
| 335 | PNG_CHUNK_WRITE_ERROR); |
| 336 | return; |
| 337 | } |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 338 | |
John Bowler | fcd301d | 2011-12-28 21:34:27 -0600 | [diff] [blame] | 339 | if (nparams < 0 || nparams > 255) |
John Bowler | 7dc0329 | 2016-09-02 19:26:42 -0700 | [diff] [blame] | 340 | { |
| 341 | png_chunk_report(png_ptr, "Invalid pCAL parameter count", |
| 342 | PNG_CHUNK_WRITE_ERROR); |
| 343 | return; |
| 344 | } |
John Bowler | fcd301d | 2011-12-28 21:34:27 -0600 | [diff] [blame] | 345 | |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 346 | /* Validate params[nparams] */ |
| 347 | for (i=0; i<nparams; ++i) |
Glenn Randers-Pehrson | 5d713fe | 2014-10-31 20:48:55 -0500 | [diff] [blame] | 348 | { |
John Bowler | fcd301d | 2011-12-28 21:34:27 -0600 | [diff] [blame] | 349 | if (params[i] == NULL || |
Glenn Randers-Pehrson | 5d713fe | 2014-10-31 20:48:55 -0500 | [diff] [blame] | 350 | !png_check_fp_string(params[i], strlen(params[i]))) |
John Bowler | 7dc0329 | 2016-09-02 19:26:42 -0700 | [diff] [blame] | 351 | { |
| 352 | png_chunk_report(png_ptr, "Invalid format for pCAL parameter", |
| 353 | PNG_CHUNK_WRITE_ERROR); |
| 354 | return; |
| 355 | } |
Glenn Randers-Pehrson | 5d713fe | 2014-10-31 20:48:55 -0500 | [diff] [blame] | 356 | } |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 357 | |
John Bowler | fcd301d | 2011-12-28 21:34:27 -0600 | [diff] [blame] | 358 | info_ptr->pcal_purpose = png_voidcast(png_charp, |
Glenn Randers-Pehrson | 5d713fe | 2014-10-31 20:48:55 -0500 | [diff] [blame] | 359 | png_malloc_warn(png_ptr, length)); |
Glenn Randers-Pehrson | 62333ba | 2010-10-23 08:48:51 -0500 | [diff] [blame] | 360 | |
Glenn Randers-Pehrson | 07748d1 | 2002-05-25 11:12:10 -0500 | [diff] [blame] | 361 | if (info_ptr->pcal_purpose == NULL) |
Glenn Randers-Pehrson | beb572e | 2006-08-19 13:59:24 -0500 | [diff] [blame] | 362 | { |
John Bowler | 7dc0329 | 2016-09-02 19:26:42 -0700 | [diff] [blame] | 363 | png_chunk_report(png_ptr, "Insufficient memory for pCAL purpose", |
| 364 | PNG_CHUNK_WRITE_ERROR); |
Glenn Randers-Pehrson | beb572e | 2006-08-19 13:59:24 -0500 | [diff] [blame] | 365 | return; |
| 366 | } |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 367 | |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 368 | memcpy(info_ptr->pcal_purpose, purpose, length); |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 369 | |
Glenn Randers-Pehrson | 51650b8 | 2008-08-05 07:44:42 -0500 | [diff] [blame] | 370 | png_debug(3, "storing X0, X1, type, and nparams in info"); |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 371 | info_ptr->pcal_X0 = X0; |
| 372 | info_ptr->pcal_X1 = X1; |
| 373 | info_ptr->pcal_type = (png_byte)type; |
| 374 | info_ptr->pcal_nparams = (png_byte)nparams; |
| 375 | |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 376 | length = strlen(units) + 1; |
Glenn Randers-Pehrson | 51650b8 | 2008-08-05 07:44:42 -0500 | [diff] [blame] | 377 | png_debug1(3, "allocating units for info (%lu bytes)", |
Glenn Randers-Pehrson | 192e92d | 2016-07-13 14:43:42 -0500 | [diff] [blame] | 378 | (unsigned long)length); |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 379 | |
John Bowler | fcd301d | 2011-12-28 21:34:27 -0600 | [diff] [blame] | 380 | info_ptr->pcal_units = png_voidcast(png_charp, |
Glenn Randers-Pehrson | 192e92d | 2016-07-13 14:43:42 -0500 | [diff] [blame] | 381 | png_malloc_warn(png_ptr, length)); |
Glenn Randers-Pehrson | 62333ba | 2010-10-23 08:48:51 -0500 | [diff] [blame] | 382 | |
Glenn Randers-Pehrson | 07748d1 | 2002-05-25 11:12:10 -0500 | [diff] [blame] | 383 | if (info_ptr->pcal_units == NULL) |
Glenn Randers-Pehrson | beb572e | 2006-08-19 13:59:24 -0500 | [diff] [blame] | 384 | { |
Glenn Randers-Pehrson | 83fb855 | 2009-06-16 17:52:23 -0500 | [diff] [blame] | 385 | png_warning(png_ptr, "Insufficient memory for pCAL units"); |
Glenn Randers-Pehrson | bd76965 | 2015-01-27 06:53:56 -0600 | [diff] [blame] | 386 | |
Glenn Randers-Pehrson | beb572e | 2006-08-19 13:59:24 -0500 | [diff] [blame] | 387 | return; |
| 388 | } |
Glenn Randers-Pehrson | 62333ba | 2010-10-23 08:48:51 -0500 | [diff] [blame] | 389 | |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 390 | memcpy(info_ptr->pcal_units, units, length); |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 391 | |
John Bowler | fcd301d | 2011-12-28 21:34:27 -0600 | [diff] [blame] | 392 | info_ptr->pcal_params = png_voidcast(png_charpp, png_malloc_warn(png_ptr, |
Cosmin Truta | a74aa9a | 2018-06-17 22:37:44 -0400 | [diff] [blame] | 393 | (size_t)(((unsigned int)nparams + 1) * (sizeof (png_charp))))); |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 394 | |
Glenn Randers-Pehrson | 07748d1 | 2002-05-25 11:12:10 -0500 | [diff] [blame] | 395 | if (info_ptr->pcal_params == NULL) |
Glenn Randers-Pehrson | beb572e | 2006-08-19 13:59:24 -0500 | [diff] [blame] | 396 | { |
Glenn Randers-Pehrson | 83fb855 | 2009-06-16 17:52:23 -0500 | [diff] [blame] | 397 | png_warning(png_ptr, "Insufficient memory for pCAL params"); |
Glenn Randers-Pehrson | bd76965 | 2015-01-27 06:53:56 -0600 | [diff] [blame] | 398 | |
Glenn Randers-Pehrson | beb572e | 2006-08-19 13:59:24 -0500 | [diff] [blame] | 399 | return; |
| 400 | } |
Glenn Randers-Pehrson | 3097f61 | 2001-05-07 14:52:45 -0500 | [diff] [blame] | 401 | |
Glenn Randers-Pehrson | 3875d9a | 2016-10-02 17:08:46 -0500 | [diff] [blame] | 402 | memset(info_ptr->pcal_params, 0, ((unsigned int)nparams + 1) * |
| 403 | (sizeof (png_charp))); |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 404 | |
| 405 | for (i = 0; i < nparams; i++) |
| 406 | { |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 407 | length = strlen(params[i]) + 1; |
Glenn Randers-Pehrson | 51650b8 | 2008-08-05 07:44:42 -0500 | [diff] [blame] | 408 | png_debug2(3, "allocating parameter %d for info (%lu bytes)", i, |
Glenn Randers-Pehrson | 62333ba | 2010-10-23 08:48:51 -0500 | [diff] [blame] | 409 | (unsigned long)length); |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 410 | |
Glenn Randers-Pehrson | 07748d1 | 2002-05-25 11:12:10 -0500 | [diff] [blame] | 411 | 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] | 412 | |
Glenn Randers-Pehrson | 07748d1 | 2002-05-25 11:12:10 -0500 | [diff] [blame] | 413 | if (info_ptr->pcal_params[i] == NULL) |
Glenn Randers-Pehrson | beb572e | 2006-08-19 13:59:24 -0500 | [diff] [blame] | 414 | { |
Glenn Randers-Pehrson | 83fb855 | 2009-06-16 17:52:23 -0500 | [diff] [blame] | 415 | png_warning(png_ptr, "Insufficient memory for pCAL parameter"); |
Glenn Randers-Pehrson | bd76965 | 2015-01-27 06:53:56 -0600 | [diff] [blame] | 416 | |
Glenn Randers-Pehrson | 83fb855 | 2009-06-16 17:52:23 -0500 | [diff] [blame] | 417 | return; |
Glenn Randers-Pehrson | beb572e | 2006-08-19 13:59:24 -0500 | [diff] [blame] | 418 | } |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 419 | |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 420 | memcpy(info_ptr->pcal_params[i], params[i], length); |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 421 | } |
| 422 | |
| 423 | info_ptr->valid |= PNG_INFO_pCAL; |
Glenn Randers-Pehrson | 1ef65b6 | 2000-05-12 06:19:53 -0500 | [diff] [blame] | 424 | info_ptr->free_me |= PNG_FREE_PCAL; |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 425 | } |
| 426 | #endif |
| 427 | |
Glenn Randers-Pehrson | a272d8f | 2010-06-25 21:45:31 -0500 | [diff] [blame] | 428 | #ifdef PNG_sCAL_SUPPORTED |
Glenn Randers-Pehrson | 4009a76 | 2010-07-31 06:34:36 -0500 | [diff] [blame] | 429 | void PNGAPI |
John Bowler | 4f67e40 | 2011-12-28 08:43:37 -0600 | [diff] [blame] | 430 | 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] | 431 | int unit, png_const_charp swidth, png_const_charp sheight) |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 432 | { |
Cosmin Truta | a74aa9a | 2018-06-17 22:37:44 -0400 | [diff] [blame] | 433 | size_t lengthw = 0, lengthh = 0; |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 434 | |
Glenn Randers-Pehrson | 51650b8 | 2008-08-05 07:44:42 -0500 | [diff] [blame] | 435 | png_debug1(1, "in %s storage function", "sCAL"); |
Glenn Randers-Pehrson | da00980 | 2009-08-15 13:25:47 -0500 | [diff] [blame] | 436 | |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 437 | if (png_ptr == NULL || info_ptr == NULL) |
| 438 | return; |
| 439 | |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 440 | /* Double check the unit (should never get here with an invalid |
| 441 | * unit unless this is an API call.) |
| 442 | */ |
| 443 | if (unit != 1 && unit != 2) |
| 444 | png_error(png_ptr, "Invalid sCAL unit"); |
| 445 | |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 446 | if (swidth == NULL || (lengthw = strlen(swidth)) == 0 || |
Glenn Randers-Pehrson | b75b241 | 2011-04-16 19:35:05 -0500 | [diff] [blame] | 447 | swidth[0] == 45 /* '-' */ || !png_check_fp_string(swidth, lengthw)) |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 448 | png_error(png_ptr, "Invalid sCAL width"); |
| 449 | |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 450 | if (sheight == NULL || (lengthh = strlen(sheight)) == 0 || |
Glenn Randers-Pehrson | b75b241 | 2011-04-16 19:35:05 -0500 | [diff] [blame] | 451 | sheight[0] == 45 /* '-' */ || !png_check_fp_string(sheight, lengthh)) |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 452 | png_error(png_ptr, "Invalid sCAL height"); |
| 453 | |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 454 | info_ptr->scal_unit = (png_byte)unit; |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 455 | |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 456 | ++lengthw; |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 457 | |
Glenn Randers-Pehrson | b764c60 | 2011-01-14 21:18:37 -0600 | [diff] [blame] | 458 | 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] | 459 | |
John Bowler | fcd301d | 2011-12-28 21:34:27 -0600 | [diff] [blame] | 460 | info_ptr->scal_s_width = png_voidcast(png_charp, |
Glenn Randers-Pehrson | dd70604 | 2016-07-15 11:20:46 -0500 | [diff] [blame] | 461 | png_malloc_warn(png_ptr, lengthw)); |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 462 | |
Glenn Randers-Pehrson | 5fea36f | 2004-07-28 08:20:44 -0500 | [diff] [blame] | 463 | if (info_ptr->scal_s_width == NULL) |
| 464 | { |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 465 | png_warning(png_ptr, "Memory allocation failed while processing sCAL"); |
Glenn Randers-Pehrson | bd76965 | 2015-01-27 06:53:56 -0600 | [diff] [blame] | 466 | |
Glenn Randers-Pehrson | 145f5c8 | 2008-07-10 09:13:13 -0500 | [diff] [blame] | 467 | return; |
Glenn Randers-Pehrson | 5fea36f | 2004-07-28 08:20:44 -0500 | [diff] [blame] | 468 | } |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 469 | |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 470 | memcpy(info_ptr->scal_s_width, swidth, lengthw); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 471 | |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 472 | ++lengthh; |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 473 | |
Glenn Randers-Pehrson | b764c60 | 2011-01-14 21:18:37 -0600 | [diff] [blame] | 474 | 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] | 475 | |
John Bowler | fcd301d | 2011-12-28 21:34:27 -0600 | [diff] [blame] | 476 | info_ptr->scal_s_height = png_voidcast(png_charp, |
Glenn Randers-Pehrson | dd70604 | 2016-07-15 11:20:46 -0500 | [diff] [blame] | 477 | png_malloc_warn(png_ptr, lengthh)); |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 478 | |
Glenn Randers-Pehrson | 5fea36f | 2004-07-28 08:20:44 -0500 | [diff] [blame] | 479 | if (info_ptr->scal_s_height == NULL) |
| 480 | { |
| 481 | png_free (png_ptr, info_ptr->scal_s_width); |
Glenn Randers-Pehrson | 895a9c9 | 2008-07-25 08:51:18 -0500 | [diff] [blame] | 482 | info_ptr->scal_s_width = NULL; |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 483 | |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 484 | png_warning(png_ptr, "Memory allocation failed while processing sCAL"); |
Glenn Randers-Pehrson | bd76965 | 2015-01-27 06:53:56 -0600 | [diff] [blame] | 485 | |
Glenn Randers-Pehrson | 145f5c8 | 2008-07-10 09:13:13 -0500 | [diff] [blame] | 486 | return; |
Glenn Randers-Pehrson | 5fea36f | 2004-07-28 08:20:44 -0500 | [diff] [blame] | 487 | } |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 488 | |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 489 | memcpy(info_ptr->scal_s_height, sheight, lengthh); |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 490 | |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 491 | info_ptr->valid |= PNG_INFO_sCAL; |
Glenn Randers-Pehrson | 1ef65b6 | 2000-05-12 06:19:53 -0500 | [diff] [blame] | 492 | info_ptr->free_me |= PNG_FREE_SCAL; |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 493 | } |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 494 | |
Glenn Randers-Pehrson | 62333ba | 2010-10-23 08:48:51 -0500 | [diff] [blame] | 495 | # ifdef PNG_FLOATING_POINT_SUPPORTED |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 496 | void PNGAPI |
John Bowler | 4f67e40 | 2011-12-28 08:43:37 -0600 | [diff] [blame] | 497 | png_set_sCAL(png_const_structrp png_ptr, png_inforp info_ptr, int unit, |
| 498 | double width, double height) |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 499 | { |
| 500 | png_debug1(1, "in %s storage function", "sCAL"); |
| 501 | |
| 502 | /* Check the arguments. */ |
| 503 | if (width <= 0) |
| 504 | png_warning(png_ptr, "Invalid sCAL width ignored"); |
Glenn Randers-Pehrson | 62333ba | 2010-10-23 08:48:51 -0500 | [diff] [blame] | 505 | |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 506 | else if (height <= 0) |
| 507 | png_warning(png_ptr, "Invalid sCAL height ignored"); |
Glenn Randers-Pehrson | 62333ba | 2010-10-23 08:48:51 -0500 | [diff] [blame] | 508 | |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 509 | else |
| 510 | { |
| 511 | /* Convert 'width' and 'height' to ASCII. */ |
| 512 | char swidth[PNG_sCAL_MAX_DIGITS+1]; |
| 513 | char sheight[PNG_sCAL_MAX_DIGITS+1]; |
| 514 | |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 515 | png_ascii_from_fp(png_ptr, swidth, (sizeof swidth), width, |
Glenn Randers-Pehrson | dd70604 | 2016-07-15 11:20:46 -0500 | [diff] [blame] | 516 | PNG_sCAL_PRECISION); |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 517 | png_ascii_from_fp(png_ptr, sheight, (sizeof sheight), height, |
Glenn Randers-Pehrson | dd70604 | 2016-07-15 11:20:46 -0500 | [diff] [blame] | 518 | PNG_sCAL_PRECISION); |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 519 | |
| 520 | png_set_sCAL_s(png_ptr, info_ptr, unit, swidth, sheight); |
| 521 | } |
| 522 | } |
Glenn Randers-Pehrson | 62333ba | 2010-10-23 08:48:51 -0500 | [diff] [blame] | 523 | # endif |
Glenn Randers-Pehrson | 4009a76 | 2010-07-31 06:34:36 -0500 | [diff] [blame] | 524 | |
Glenn Randers-Pehrson | 62333ba | 2010-10-23 08:48:51 -0500 | [diff] [blame] | 525 | # ifdef PNG_FIXED_POINT_SUPPORTED |
Glenn Randers-Pehrson | 4009a76 | 2010-07-31 06:34:36 -0500 | [diff] [blame] | 526 | void PNGAPI |
John Bowler | 4f67e40 | 2011-12-28 08:43:37 -0600 | [diff] [blame] | 527 | 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] | 528 | png_fixed_point width, png_fixed_point height) |
Glenn Randers-Pehrson | 4009a76 | 2010-07-31 06:34:36 -0500 | [diff] [blame] | 529 | { |
| 530 | png_debug1(1, "in %s storage function", "sCAL"); |
| 531 | |
| 532 | /* Check the arguments. */ |
| 533 | if (width <= 0) |
| 534 | png_warning(png_ptr, "Invalid sCAL width ignored"); |
Glenn Randers-Pehrson | 62333ba | 2010-10-23 08:48:51 -0500 | [diff] [blame] | 535 | |
Glenn Randers-Pehrson | 4009a76 | 2010-07-31 06:34:36 -0500 | [diff] [blame] | 536 | else if (height <= 0) |
| 537 | png_warning(png_ptr, "Invalid sCAL height ignored"); |
Glenn Randers-Pehrson | 62333ba | 2010-10-23 08:48:51 -0500 | [diff] [blame] | 538 | |
Glenn Randers-Pehrson | 4009a76 | 2010-07-31 06:34:36 -0500 | [diff] [blame] | 539 | else |
| 540 | { |
| 541 | /* Convert 'width' and 'height' to ASCII. */ |
| 542 | char swidth[PNG_sCAL_MAX_DIGITS+1]; |
| 543 | char sheight[PNG_sCAL_MAX_DIGITS+1]; |
| 544 | |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 545 | png_ascii_from_fixed(png_ptr, swidth, (sizeof swidth), width); |
| 546 | png_ascii_from_fixed(png_ptr, sheight, (sizeof sheight), height); |
Glenn Randers-Pehrson | 4009a76 | 2010-07-31 06:34:36 -0500 | [diff] [blame] | 547 | |
| 548 | png_set_sCAL_s(png_ptr, info_ptr, unit, swidth, sheight); |
| 549 | } |
| 550 | } |
Glenn Randers-Pehrson | 62333ba | 2010-10-23 08:48:51 -0500 | [diff] [blame] | 551 | # endif |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 552 | #endif |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 553 | |
Glenn Randers-Pehrson | e26c095 | 2009-09-23 11:22:08 -0500 | [diff] [blame] | 554 | #ifdef PNG_pHYs_SUPPORTED |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 555 | void PNGAPI |
John Bowler | 4f67e40 | 2011-12-28 08:43:37 -0600 | [diff] [blame] | 556 | 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] | 557 | 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] | 558 | { |
Glenn Randers-Pehrson | 51650b8 | 2008-08-05 07:44:42 -0500 | [diff] [blame] | 559 | png_debug1(1, "in %s storage function", "pHYs"); |
Glenn Randers-Pehrson | da00980 | 2009-08-15 13:25:47 -0500 | [diff] [blame] | 560 | |
Glenn Randers-Pehrson | a357b99 | 1998-02-08 20:56:40 -0600 | [diff] [blame] | 561 | if (png_ptr == NULL || info_ptr == NULL) |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 562 | return; |
| 563 | |
| 564 | info_ptr->x_pixels_per_unit = res_x; |
| 565 | info_ptr->y_pixels_per_unit = res_y; |
| 566 | info_ptr->phys_unit_type = (png_byte)unit_type; |
| 567 | info_ptr->valid |= PNG_INFO_pHYs; |
| 568 | } |
| 569 | #endif |
| 570 | |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 571 | void PNGAPI |
John Bowler | 5d56786 | 2011-12-24 09:12:00 -0600 | [diff] [blame] | 572 | png_set_PLTE(png_structrp png_ptr, png_inforp info_ptr, |
Glenn Randers-Pehrson | e600c51 | 2010-08-18 07:25:46 -0500 | [diff] [blame] | 573 | png_const_colorp palette, int num_palette) |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 574 | { |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 575 | |
Glenn Randers-Pehrson | a901eb3 | 2015-10-30 07:57:49 -0500 | [diff] [blame] | 576 | png_uint_32 max_palette_length; |
| 577 | |
Glenn Randers-Pehrson | 51650b8 | 2008-08-05 07:44:42 -0500 | [diff] [blame] | 578 | png_debug1(1, "in %s storage function", "PLTE"); |
Glenn Randers-Pehrson | da00980 | 2009-08-15 13:25:47 -0500 | [diff] [blame] | 579 | |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 580 | if (png_ptr == NULL || info_ptr == NULL) |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 581 | return; |
| 582 | |
Glenn Randers-Pehrson | 0a9afc1 | 2015-11-22 20:53:02 -0600 | [diff] [blame] | 583 | max_palette_length = (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE) ? |
| 584 | (1 << info_ptr->bit_depth) : PNG_MAX_PALETTE_LENGTH; |
Glenn Randers-Pehrson | a901eb3 | 2015-10-30 07:57:49 -0500 | [diff] [blame] | 585 | |
Glenn Randers-Pehrson | 1bef8e9 | 2015-10-30 11:34:37 -0500 | [diff] [blame] | 586 | if (num_palette < 0 || num_palette > (int) max_palette_length) |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 587 | { |
| 588 | if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE) |
Glenn Randers-Pehrson | 9c3ab68 | 2006-02-20 22:09:05 -0600 | [diff] [blame] | 589 | png_error(png_ptr, "Invalid palette length"); |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 590 | |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 591 | else |
| 592 | { |
Glenn Randers-Pehrson | 9c3ab68 | 2006-02-20 22:09:05 -0600 | [diff] [blame] | 593 | png_warning(png_ptr, "Invalid palette length"); |
Glenn Randers-Pehrson | bd76965 | 2015-01-27 06:53:56 -0600 | [diff] [blame] | 594 | |
Glenn Randers-Pehrson | 9c3ab68 | 2006-02-20 22:09:05 -0600 | [diff] [blame] | 595 | return; |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 596 | } |
| 597 | } |
Glenn Randers-Pehrson | 9c3ab68 | 2006-02-20 22:09:05 -0600 | [diff] [blame] | 598 | |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 599 | if ((num_palette > 0 && palette == NULL) || |
| 600 | (num_palette == 0 |
| 601 | # ifdef PNG_MNG_FEATURES_SUPPORTED |
| 602 | && (png_ptr->mng_features_permitted & PNG_FLAG_MNG_EMPTY_PLTE) == 0 |
| 603 | # endif |
| 604 | )) |
| 605 | { |
Glenn Randers-Pehrson | 67f101e | 2013-12-14 12:36:28 -0600 | [diff] [blame] | 606 | png_error(png_ptr, "Invalid palette"); |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 607 | } |
| 608 | |
Glenn Randers-Pehrson | f81b50b | 2009-12-29 16:50:15 -0600 | [diff] [blame] | 609 | /* 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] | 610 | * we do it for backward compatibility with the way the png_handle_tRNS |
| 611 | * function used to do the allocation. |
John Bowler | 4f67e40 | 2011-12-28 08:43:37 -0600 | [diff] [blame] | 612 | * |
| 613 | * 1.6.0: the above statement appears to be incorrect; something has to set |
| 614 | * the palette inside png_struct on read. |
Glenn Randers-Pehrson | 76e5fd6 | 2000-12-28 07:50:05 -0600 | [diff] [blame] | 615 | */ |
Glenn Randers-Pehrson | 76e5fd6 | 2000-12-28 07:50:05 -0600 | [diff] [blame] | 616 | png_free_data(png_ptr, info_ptr, PNG_FREE_PLTE, 0); |
Glenn Randers-Pehrson | 5fea36f | 2004-07-28 08:20:44 -0500 | [diff] [blame] | 617 | |
Glenn Randers-Pehrson | 9c3ab68 | 2006-02-20 22:09:05 -0600 | [diff] [blame] | 618 | /* Changed in libpng-1.2.1 to allocate PNG_MAX_PALETTE_LENGTH instead |
Glenn Randers-Pehrson | a901eb3 | 2015-10-30 07:57:49 -0500 | [diff] [blame] | 619 | * of num_palette entries, in case of an invalid PNG file or incorrect |
| 620 | * call to png_set_PLTE() with too-large sample values. |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 621 | */ |
John Bowler | fcd301d | 2011-12-28 21:34:27 -0600 | [diff] [blame] | 622 | png_ptr->palette = png_voidcast(png_colorp, png_calloc(png_ptr, |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 623 | PNG_MAX_PALETTE_LENGTH * (sizeof (png_color)))); |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 624 | |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 625 | if (num_palette > 0) |
Glenn Randers-Pehrson | 0e06b59 | 2018-03-06 13:54:52 -0600 | [diff] [blame] | 626 | memcpy(png_ptr->palette, palette, (unsigned int)num_palette * |
Glenn Randers-Pehrson | 3875d9a | 2016-10-02 17:08:46 -0500 | [diff] [blame] | 627 | (sizeof (png_color))); |
Glenn Randers-Pehrson | 76e5fd6 | 2000-12-28 07:50:05 -0600 | [diff] [blame] | 628 | info_ptr->palette = png_ptr->palette; |
| 629 | 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] | 630 | |
Glenn Randers-Pehrson | 76e5fd6 | 2000-12-28 07:50:05 -0600 | [diff] [blame] | 631 | info_ptr->free_me |= PNG_FREE_PLTE; |
Glenn Randers-Pehrson | 76e5fd6 | 2000-12-28 07:50:05 -0600 | [diff] [blame] | 632 | |
Glenn Randers-Pehrson | a77ef62 | 2000-02-18 13:48:52 -0600 | [diff] [blame] | 633 | info_ptr->valid |= PNG_INFO_PLTE; |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 634 | } |
| 635 | |
Glenn Randers-Pehrson | e26c095 | 2009-09-23 11:22:08 -0500 | [diff] [blame] | 636 | #ifdef PNG_sBIT_SUPPORTED |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 637 | void PNGAPI |
John Bowler | 4f67e40 | 2011-12-28 08:43:37 -0600 | [diff] [blame] | 638 | 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] | 639 | png_const_color_8p sig_bit) |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 640 | { |
Glenn Randers-Pehrson | 51650b8 | 2008-08-05 07:44:42 -0500 | [diff] [blame] | 641 | png_debug1(1, "in %s storage function", "sBIT"); |
Glenn Randers-Pehrson | da00980 | 2009-08-15 13:25:47 -0500 | [diff] [blame] | 642 | |
John Bowler | fcd301d | 2011-12-28 21:34:27 -0600 | [diff] [blame] | 643 | if (png_ptr == NULL || info_ptr == NULL || sig_bit == NULL) |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 644 | return; |
| 645 | |
John Bowler | fcd301d | 2011-12-28 21:34:27 -0600 | [diff] [blame] | 646 | info_ptr->sig_bit = *sig_bit; |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 647 | info_ptr->valid |= PNG_INFO_sBIT; |
| 648 | } |
| 649 | #endif |
| 650 | |
Glenn Randers-Pehrson | e26c095 | 2009-09-23 11:22:08 -0500 | [diff] [blame] | 651 | #ifdef PNG_sRGB_SUPPORTED |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 652 | void PNGAPI |
John Bowler | 4f67e40 | 2011-12-28 08:43:37 -0600 | [diff] [blame] | 653 | 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] | 654 | { |
Glenn Randers-Pehrson | 51650b8 | 2008-08-05 07:44:42 -0500 | [diff] [blame] | 655 | png_debug1(1, "in %s storage function", "sRGB"); |
Glenn Randers-Pehrson | da00980 | 2009-08-15 13:25:47 -0500 | [diff] [blame] | 656 | |
Glenn Randers-Pehrson | a357b99 | 1998-02-08 20:56:40 -0600 | [diff] [blame] | 657 | if (png_ptr == NULL || info_ptr == NULL) |
Glenn Randers-Pehrson | b6ce43d | 1998-01-01 07:13:13 -0600 | [diff] [blame] | 658 | return; |
| 659 | |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 660 | (void)png_colorspace_set_sRGB(png_ptr, &info_ptr->colorspace, srgb_intent); |
| 661 | png_colorspace_sync_info(png_ptr, info_ptr); |
Glenn Randers-Pehrson | b6ce43d | 1998-01-01 07:13:13 -0600 | [diff] [blame] | 662 | } |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 663 | |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 664 | void PNGAPI |
John Bowler | 4f67e40 | 2011-12-28 08:43:37 -0600 | [diff] [blame] | 665 | 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] | 666 | int srgb_intent) |
Glenn Randers-Pehrson | b6ce43d | 1998-01-01 07:13:13 -0600 | [diff] [blame] | 667 | { |
Glenn Randers-Pehrson | 51650b8 | 2008-08-05 07:44:42 -0500 | [diff] [blame] | 668 | png_debug1(1, "in %s storage function", "sRGB_gAMA_and_cHRM"); |
Glenn Randers-Pehrson | da00980 | 2009-08-15 13:25:47 -0500 | [diff] [blame] | 669 | |
Glenn Randers-Pehrson | a357b99 | 1998-02-08 20:56:40 -0600 | [diff] [blame] | 670 | if (png_ptr == NULL || info_ptr == NULL) |
Glenn Randers-Pehrson | b6ce43d | 1998-01-01 07:13:13 -0600 | [diff] [blame] | 671 | return; |
| 672 | |
Glenn Randers-Pehrson | 5d713fe | 2014-10-31 20:48:55 -0500 | [diff] [blame] | 673 | if (png_colorspace_set_sRGB(png_ptr, &info_ptr->colorspace, |
| 674 | srgb_intent) != 0) |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 675 | { |
| 676 | /* This causes the gAMA and cHRM to be written too */ |
| 677 | info_ptr->colorspace.flags |= |
| 678 | PNG_COLORSPACE_FROM_gAMA|PNG_COLORSPACE_FROM_cHRM; |
| 679 | } |
Glenn Randers-Pehrson | b6ce43d | 1998-01-01 07:13:13 -0600 | [diff] [blame] | 680 | |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 681 | png_colorspace_sync_info(png_ptr, info_ptr); |
Glenn Randers-Pehrson | b6ce43d | 1998-01-01 07:13:13 -0600 | [diff] [blame] | 682 | } |
Glenn Randers-Pehrson | 02a5e33 | 2008-11-24 22:10:23 -0600 | [diff] [blame] | 683 | #endif /* sRGB */ |
Glenn Randers-Pehrson | b6ce43d | 1998-01-01 07:13:13 -0600 | [diff] [blame] | 684 | |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 685 | |
Glenn Randers-Pehrson | e26c095 | 2009-09-23 11:22:08 -0500 | [diff] [blame] | 686 | #ifdef PNG_iCCP_SUPPORTED |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 687 | void PNGAPI |
John Bowler | 4f67e40 | 2011-12-28 08:43:37 -0600 | [diff] [blame] | 688 | 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] | 689 | png_const_charp name, int compression_type, |
| 690 | png_const_bytep profile, png_uint_32 proflen) |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 691 | { |
Glenn Randers-Pehrson | 4accabb | 2000-04-14 14:20:47 -0500 | [diff] [blame] | 692 | png_charp new_iccp_name; |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 693 | png_bytep new_iccp_profile; |
Cosmin Truta | a74aa9a | 2018-06-17 22:37:44 -0400 | [diff] [blame] | 694 | size_t length; |
Glenn Randers-Pehrson | 4accabb | 2000-04-14 14:20:47 -0500 | [diff] [blame] | 695 | |
Glenn Randers-Pehrson | 51650b8 | 2008-08-05 07:44:42 -0500 | [diff] [blame] | 696 | png_debug1(1, "in %s storage function", "iCCP"); |
Glenn Randers-Pehrson | da00980 | 2009-08-15 13:25:47 -0500 | [diff] [blame] | 697 | |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 698 | if (png_ptr == NULL || info_ptr == NULL || name == NULL || profile == NULL) |
| 699 | return; |
| 700 | |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 701 | if (compression_type != PNG_COMPRESSION_TYPE_BASE) |
| 702 | png_app_error(png_ptr, "Invalid iCCP compression method"); |
| 703 | |
| 704 | /* Set the colorspace first because this validates the profile; do not |
| 705 | * override previously set app cHRM or gAMA here (because likely as not the |
| 706 | * application knows better than libpng what the correct values are.) Pass |
| 707 | * the info_ptr color_type field to png_colorspace_set_ICC because in the |
| 708 | * write case it has not yet been stored in png_ptr. |
| 709 | */ |
| 710 | { |
| 711 | int result = png_colorspace_set_ICC(png_ptr, &info_ptr->colorspace, name, |
Glenn Randers-Pehrson | dd70604 | 2016-07-15 11:20:46 -0500 | [diff] [blame] | 712 | proflen, profile, info_ptr->color_type); |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 713 | |
| 714 | png_colorspace_sync_info(png_ptr, info_ptr); |
| 715 | |
| 716 | /* Don't do any of the copying if the profile was bad, or inconsistent. */ |
Glenn Randers-Pehrson | 0567015 | 2014-03-08 12:39:52 -0600 | [diff] [blame] | 717 | if (result == 0) |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 718 | return; |
| 719 | |
| 720 | /* But do write the gAMA and cHRM chunks from the profile. */ |
| 721 | info_ptr->colorspace.flags |= |
| 722 | PNG_COLORSPACE_FROM_gAMA|PNG_COLORSPACE_FROM_cHRM; |
| 723 | } |
| 724 | |
| 725 | length = strlen(name)+1; |
John Bowler | fcd301d | 2011-12-28 21:34:27 -0600 | [diff] [blame] | 726 | 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] | 727 | |
Glenn Randers-Pehrson | 5fea36f | 2004-07-28 08:20:44 -0500 | [diff] [blame] | 728 | if (new_iccp_name == NULL) |
| 729 | { |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 730 | png_benign_error(png_ptr, "Insufficient memory to process iCCP chunk"); |
Glenn Randers-Pehrson | bd76965 | 2015-01-27 06:53:56 -0600 | [diff] [blame] | 731 | |
Glenn Randers-Pehrson | 5fea36f | 2004-07-28 08:20:44 -0500 | [diff] [blame] | 732 | return; |
| 733 | } |
Glenn Randers-Pehrson | 62333ba | 2010-10-23 08:48:51 -0500 | [diff] [blame] | 734 | |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 735 | memcpy(new_iccp_name, name, length); |
John Bowler | fcd301d | 2011-12-28 21:34:27 -0600 | [diff] [blame] | 736 | new_iccp_profile = png_voidcast(png_bytep, |
Glenn Randers-Pehrson | dd70604 | 2016-07-15 11:20:46 -0500 | [diff] [blame] | 737 | png_malloc_warn(png_ptr, proflen)); |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 738 | |
Glenn Randers-Pehrson | 5fea36f | 2004-07-28 08:20:44 -0500 | [diff] [blame] | 739 | if (new_iccp_profile == NULL) |
| 740 | { |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 741 | png_free(png_ptr, new_iccp_name); |
| 742 | png_benign_error(png_ptr, |
Glenn Randers-Pehrson | f81b50b | 2009-12-29 16:50:15 -0600 | [diff] [blame] | 743 | "Insufficient memory to process iCCP profile"); |
Glenn Randers-Pehrson | bd76965 | 2015-01-27 06:53:56 -0600 | [diff] [blame] | 744 | |
Glenn Randers-Pehrson | 5fea36f | 2004-07-28 08:20:44 -0500 | [diff] [blame] | 745 | return; |
| 746 | } |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 747 | |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 748 | memcpy(new_iccp_profile, profile, proflen); |
Glenn Randers-Pehrson | 4accabb | 2000-04-14 14:20:47 -0500 | [diff] [blame] | 749 | |
Glenn Randers-Pehrson | 38e6e77 | 2000-04-09 19:06:13 -0500 | [diff] [blame] | 750 | png_free_data(png_ptr, info_ptr, PNG_FREE_ICCP, 0); |
Glenn Randers-Pehrson | 4accabb | 2000-04-14 14:20:47 -0500 | [diff] [blame] | 751 | |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 752 | info_ptr->iccp_proflen = proflen; |
Glenn Randers-Pehrson | 4accabb | 2000-04-14 14:20:47 -0500 | [diff] [blame] | 753 | info_ptr->iccp_name = new_iccp_name; |
| 754 | info_ptr->iccp_profile = new_iccp_profile; |
Glenn Randers-Pehrson | a77ef62 | 2000-02-18 13:48:52 -0600 | [diff] [blame] | 755 | info_ptr->free_me |= PNG_FREE_ICCP; |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 756 | info_ptr->valid |= PNG_INFO_iCCP; |
| 757 | } |
| 758 | #endif |
| 759 | |
Glenn Randers-Pehrson | e26c095 | 2009-09-23 11:22:08 -0500 | [diff] [blame] | 760 | #ifdef PNG_TEXT_SUPPORTED |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 761 | void PNGAPI |
John Bowler | 4f67e40 | 2011-12-28 08:43:37 -0600 | [diff] [blame] | 762 | png_set_text(png_const_structrp png_ptr, png_inforp info_ptr, |
| 763 | png_const_textp text_ptr, int num_text) |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 764 | { |
Glenn Randers-Pehrson | 07748d1 | 2002-05-25 11:12:10 -0500 | [diff] [blame] | 765 | int ret; |
Glenn Randers-Pehrson | 895a9c9 | 2008-07-25 08:51:18 -0500 | [diff] [blame] | 766 | 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] | 767 | |
Glenn Randers-Pehrson | 0567015 | 2014-03-08 12:39:52 -0600 | [diff] [blame] | 768 | if (ret != 0) |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 769 | png_error(png_ptr, "Insufficient memory to store text"); |
Glenn Randers-Pehrson | 07748d1 | 2002-05-25 11:12:10 -0500 | [diff] [blame] | 770 | } |
| 771 | |
| 772 | int /* PRIVATE */ |
John Bowler | 4f67e40 | 2011-12-28 08:43:37 -0600 | [diff] [blame] | 773 | 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] | 774 | png_const_textp text_ptr, int num_text) |
Glenn Randers-Pehrson | 07748d1 | 2002-05-25 11:12:10 -0500 | [diff] [blame] | 775 | { |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 776 | int i; |
| 777 | |
Glenn Randers-Pehrson | a8242fe | 2015-08-17 20:46:27 -0500 | [diff] [blame] | 778 | png_debug1(1, "in %lx storage function", png_ptr == NULL ? 0xabadca11U : |
Glenn Randers-Pehrson | bb5cb14 | 2011-09-22 12:41:58 -0500 | [diff] [blame] | 779 | (unsigned long)png_ptr->chunk_name); |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 780 | |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 781 | 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] | 782 | return(0); |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 783 | |
| 784 | /* Make sure we have enough space in the "text" array in info_struct |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 785 | * to hold all of the incoming text_ptr objects. This compare can't overflow |
| 786 | * because max_text >= num_text (anyway, subtract of two positive integers |
| 787 | * can't overflow in any case.) |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 788 | */ |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 789 | if (num_text > info_ptr->max_text - info_ptr->num_text) |
Glenn Randers-Pehrson | 590c8b0 | 2013-01-19 08:49:12 -0600 | [diff] [blame] | 790 | { |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 791 | int old_num_text = info_ptr->num_text; |
| 792 | int max_text; |
| 793 | png_textp new_text = NULL; |
| 794 | |
| 795 | /* Calculate an appropriate max_text, checking for overflow. */ |
| 796 | max_text = old_num_text; |
| 797 | if (num_text <= INT_MAX - max_text) |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 798 | { |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 799 | max_text += num_text; |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 800 | |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 801 | /* Round up to a multiple of 8 */ |
| 802 | if (max_text < INT_MAX-8) |
| 803 | max_text = (max_text + 8) & ~0x7; |
Glenn Randers-Pehrson | 96027d9 | 2012-03-29 06:15:55 -0500 | [diff] [blame] | 804 | |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 805 | else |
| 806 | max_text = INT_MAX; |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 807 | |
Glenn Randers-Pehrson | 9127138 | 2014-10-03 20:23:31 -0500 | [diff] [blame] | 808 | /* Now allocate a new array and copy the old members in; this does all |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 809 | * the overflow checks. |
| 810 | */ |
| 811 | new_text = png_voidcast(png_textp,png_realloc_array(png_ptr, |
Glenn Randers-Pehrson | dd70604 | 2016-07-15 11:20:46 -0500 | [diff] [blame] | 812 | info_ptr->text, old_num_text, max_text-old_num_text, |
| 813 | sizeof *new_text)); |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 814 | } |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 815 | |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 816 | if (new_text == NULL) |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 817 | { |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 818 | png_chunk_report(png_ptr, "too many text chunks", |
Glenn Randers-Pehrson | dd70604 | 2016-07-15 11:20:46 -0500 | [diff] [blame] | 819 | PNG_CHUNK_WRITE_ERROR); |
Glenn Randers-Pehrson | bd76965 | 2015-01-27 06:53:56 -0600 | [diff] [blame] | 820 | |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 821 | return 1; |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 822 | } |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 823 | |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 824 | png_free(png_ptr, info_ptr->text); |
| 825 | |
| 826 | info_ptr->text = new_text; |
| 827 | info_ptr->free_me |= PNG_FREE_TEXT; |
| 828 | info_ptr->max_text = max_text; |
| 829 | /* num_text is adjusted below as the entries are copied in */ |
| 830 | |
| 831 | png_debug1(3, "allocated %d entries for info_ptr->text", max_text); |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 832 | } |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 833 | |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 834 | for (i = 0; i < num_text; i++) |
| 835 | { |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 836 | size_t text_length, key_len; |
| 837 | size_t lang_len, lang_key_len; |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 838 | png_textp textp = &(info_ptr->text[info_ptr->num_text]); |
| 839 | |
Glenn Randers-Pehrson | 3097f61 | 2001-05-07 14:52:45 -0500 | [diff] [blame] | 840 | if (text_ptr[i].key == NULL) |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 841 | continue; |
| 842 | |
Glenn Randers-Pehrson | 79b2d64 | 2010-10-13 07:31:14 -0500 | [diff] [blame] | 843 | if (text_ptr[i].compression < PNG_TEXT_COMPRESSION_NONE || |
| 844 | text_ptr[i].compression >= PNG_TEXT_COMPRESSION_LAST) |
Glenn Randers-Pehrson | e34f80e | 2010-10-13 06:55:30 -0500 | [diff] [blame] | 845 | { |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 846 | png_chunk_report(png_ptr, "text compression mode is out of range", |
Glenn Randers-Pehrson | dd70604 | 2016-07-15 11:20:46 -0500 | [diff] [blame] | 847 | PNG_CHUNK_WRITE_ERROR); |
Glenn Randers-Pehrson | e34f80e | 2010-10-13 06:55:30 -0500 | [diff] [blame] | 848 | continue; |
| 849 | } |
| 850 | |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 851 | key_len = strlen(text_ptr[i].key); |
Glenn Randers-Pehrson | 79b2d64 | 2010-10-13 07:31:14 -0500 | [diff] [blame] | 852 | |
Glenn Randers-Pehrson | 145f5c8 | 2008-07-10 09:13:13 -0500 | [diff] [blame] | 853 | if (text_ptr[i].compression <= 0) |
Glenn Randers-Pehrson | 1ef65b6 | 2000-05-12 06:19:53 -0500 | [diff] [blame] | 854 | { |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 855 | lang_len = 0; |
| 856 | lang_key_len = 0; |
Glenn Randers-Pehrson | 1ef65b6 | 2000-05-12 06:19:53 -0500 | [diff] [blame] | 857 | } |
Glenn Randers-Pehrson | ef29a5e | 2009-10-31 19:37:05 -0500 | [diff] [blame] | 858 | |
Glenn Randers-Pehrson | dd78d52 | 2010-03-30 08:34:02 -0500 | [diff] [blame] | 859 | else |
Glenn Randers-Pehrson | 62333ba | 2010-10-23 08:48:51 -0500 | [diff] [blame] | 860 | # ifdef PNG_iTXt_SUPPORTED |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 861 | { |
Glenn Randers-Pehrson | 4bb4d01 | 2009-05-20 12:45:29 -0500 | [diff] [blame] | 862 | /* Set iTXt data */ |
Glenn Randers-Pehrson | d6ea40a | 2009-11-02 07:32:00 -0600 | [diff] [blame] | 863 | |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 864 | if (text_ptr[i].lang != NULL) |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 865 | lang_len = strlen(text_ptr[i].lang); |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 866 | |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 867 | else |
| 868 | lang_len = 0; |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 869 | |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 870 | if (text_ptr[i].lang_key != NULL) |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 871 | lang_key_len = strlen(text_ptr[i].lang_key); |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 872 | |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 873 | else |
| 874 | lang_key_len = 0; |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 875 | } |
Glenn Randers-Pehrson | bd76965 | 2015-01-27 06:53:56 -0600 | [diff] [blame] | 876 | # else /* iTXt */ |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 877 | { |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 878 | png_chunk_report(png_ptr, "iTXt chunk not supported", |
Glenn Randers-Pehrson | dd70604 | 2016-07-15 11:20:46 -0500 | [diff] [blame] | 879 | PNG_CHUNK_WRITE_ERROR); |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 880 | continue; |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 881 | } |
Glenn Randers-Pehrson | 62333ba | 2010-10-23 08:48:51 -0500 | [diff] [blame] | 882 | # endif |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 883 | |
Glenn Randers-Pehrson | d7edcc4 | 2017-09-13 19:34:51 -0500 | [diff] [blame] | 884 | if (text_ptr[i].text == NULL || text_ptr[i].text[0] == '\0') |
Glenn Randers-Pehrson | 1aabcfd | 2017-09-10 05:45:44 -0500 | [diff] [blame] | 885 | { |
| 886 | text_length = 0; |
| 887 | # ifdef PNG_iTXt_SUPPORTED |
| 888 | if (text_ptr[i].compression > 0) |
| 889 | textp->compression = PNG_ITXT_COMPRESSION_NONE; |
| 890 | |
| 891 | else |
| 892 | # endif |
| 893 | textp->compression = PNG_TEXT_COMPRESSION_NONE; |
| 894 | } |
Glenn Randers-Pehrson | 066cb34 | 2017-09-19 15:52:36 -0500 | [diff] [blame] | 895 | |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 896 | else |
| 897 | { |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 898 | text_length = strlen(text_ptr[i].text); |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 899 | textp->compression = text_ptr[i].compression; |
| 900 | } |
Glenn Randers-Pehrson | 6d8f3b0 | 1999-10-23 08:39:18 -0500 | [diff] [blame] | 901 | |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 902 | textp->key = png_voidcast(png_charp,png_malloc_base(png_ptr, |
| 903 | key_len + text_length + lang_len + lang_key_len + 4)); |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 904 | |
Glenn Randers-Pehrson | 07748d1 | 2002-05-25 11:12:10 -0500 | [diff] [blame] | 905 | if (textp->key == NULL) |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 906 | { |
| 907 | png_chunk_report(png_ptr, "text chunk: out of memory", |
Glenn Randers-Pehrson | dd70604 | 2016-07-15 11:20:46 -0500 | [diff] [blame] | 908 | PNG_CHUNK_WRITE_ERROR); |
Glenn Randers-Pehrson | bd76965 | 2015-01-27 06:53:56 -0600 | [diff] [blame] | 909 | |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 910 | return 1; |
| 911 | } |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 912 | |
Glenn Randers-Pehrson | b764c60 | 2011-01-14 21:18:37 -0600 | [diff] [blame] | 913 | 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] | 914 | (unsigned long)(png_uint_32) |
| 915 | (key_len + lang_len + lang_key_len + text_length + 4), |
Glenn Randers-Pehrson | b764c60 | 2011-01-14 21:18:37 -0600 | [diff] [blame] | 916 | textp->key); |
Glenn Randers-Pehrson | 6d8f3b0 | 1999-10-23 08:39:18 -0500 | [diff] [blame] | 917 | |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 918 | memcpy(textp->key, text_ptr[i].key, key_len); |
Glenn Randers-Pehrson | 145f5c8 | 2008-07-10 09:13:13 -0500 | [diff] [blame] | 919 | *(textp->key + key_len) = '\0'; |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 920 | |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 921 | if (text_ptr[i].compression > 0) |
| 922 | { |
Glenn Randers-Pehrson | 895a9c9 | 2008-07-25 08:51:18 -0500 | [diff] [blame] | 923 | textp->lang = textp->key + key_len + 1; |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 924 | memcpy(textp->lang, text_ptr[i].lang, lang_len); |
Glenn Randers-Pehrson | 145f5c8 | 2008-07-10 09:13:13 -0500 | [diff] [blame] | 925 | *(textp->lang + lang_len) = '\0'; |
Glenn Randers-Pehrson | 895a9c9 | 2008-07-25 08:51:18 -0500 | [diff] [blame] | 926 | textp->lang_key = textp->lang + lang_len + 1; |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 927 | 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] | 928 | *(textp->lang_key + lang_key_len) = '\0'; |
Glenn Randers-Pehrson | 895a9c9 | 2008-07-25 08:51:18 -0500 | [diff] [blame] | 929 | textp->text = textp->lang_key + lang_key_len + 1; |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 930 | } |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 931 | |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 932 | else |
| 933 | { |
Glenn Randers-Pehrson | 3f54925 | 2001-10-27 07:35:13 -0500 | [diff] [blame] | 934 | textp->lang=NULL; |
| 935 | textp->lang_key=NULL; |
Glenn Randers-Pehrson | 895a9c9 | 2008-07-25 08:51:18 -0500 | [diff] [blame] | 936 | textp->text = textp->key + key_len + 1; |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 937 | } |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 938 | |
Glenn Randers-Pehrson | 0567015 | 2014-03-08 12:39:52 -0600 | [diff] [blame] | 939 | if (text_length != 0) |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 940 | memcpy(textp->text, text_ptr[i].text, text_length); |
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 | *(textp->text + text_length) = '\0'; |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 943 | |
Glenn Randers-Pehrson | 62333ba | 2010-10-23 08:48:51 -0500 | [diff] [blame] | 944 | # ifdef PNG_iTXt_SUPPORTED |
Glenn Randers-Pehrson | 145f5c8 | 2008-07-10 09:13:13 -0500 | [diff] [blame] | 945 | if (textp->compression > 0) |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 946 | { |
| 947 | textp->text_length = 0; |
| 948 | textp->itxt_length = text_length; |
| 949 | } |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 950 | |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 951 | else |
Glenn Randers-Pehrson | 62333ba | 2010-10-23 08:48:51 -0500 | [diff] [blame] | 952 | # endif |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 953 | { |
| 954 | textp->text_length = text_length; |
| 955 | textp->itxt_length = 0; |
| 956 | } |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 957 | |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 958 | info_ptr->num_text++; |
Glenn Randers-Pehrson | 51650b8 | 2008-08-05 07:44:42 -0500 | [diff] [blame] | 959 | png_debug1(3, "transferred text chunk %d", info_ptr->num_text); |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 960 | } |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 961 | |
Glenn Randers-Pehrson | 07748d1 | 2002-05-25 11:12:10 -0500 | [diff] [blame] | 962 | return(0); |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 963 | } |
| 964 | #endif |
| 965 | |
Glenn Randers-Pehrson | e26c095 | 2009-09-23 11:22:08 -0500 | [diff] [blame] | 966 | #ifdef PNG_tIME_SUPPORTED |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 967 | void PNGAPI |
John Bowler | 4f67e40 | 2011-12-28 08:43:37 -0600 | [diff] [blame] | 968 | png_set_tIME(png_const_structrp png_ptr, png_inforp info_ptr, |
| 969 | png_const_timep mod_time) |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 970 | { |
Glenn Randers-Pehrson | 51650b8 | 2008-08-05 07:44:42 -0500 | [diff] [blame] | 971 | png_debug1(1, "in %s storage function", "tIME"); |
Glenn Randers-Pehrson | da00980 | 2009-08-15 13:25:47 -0500 | [diff] [blame] | 972 | |
John Bowler | fcd301d | 2011-12-28 21:34:27 -0600 | [diff] [blame] | 973 | if (png_ptr == NULL || info_ptr == NULL || mod_time == NULL || |
Glenn Randers-Pehrson | 5d713fe | 2014-10-31 20:48:55 -0500 | [diff] [blame] | 974 | (png_ptr->mode & PNG_WROTE_tIME) != 0) |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 975 | return; |
| 976 | |
Glenn Randers-Pehrson | 29fca79 | 2011-11-19 15:08:04 -0600 | [diff] [blame] | 977 | if (mod_time->month == 0 || mod_time->month > 12 || |
| 978 | mod_time->day == 0 || mod_time->day > 31 || |
| 979 | mod_time->hour > 23 || mod_time->minute > 59 || |
| 980 | mod_time->second > 60) |
| 981 | { |
| 982 | png_warning(png_ptr, "Ignoring invalid time value"); |
Glenn Randers-Pehrson | bd76965 | 2015-01-27 06:53:56 -0600 | [diff] [blame] | 983 | |
Glenn Randers-Pehrson | 29fca79 | 2011-11-19 15:08:04 -0600 | [diff] [blame] | 984 | return; |
| 985 | } |
| 986 | |
John Bowler | fcd301d | 2011-12-28 21:34:27 -0600 | [diff] [blame] | 987 | info_ptr->mod_time = *mod_time; |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 988 | info_ptr->valid |= PNG_INFO_tIME; |
| 989 | } |
| 990 | #endif |
| 991 | |
Glenn Randers-Pehrson | e26c095 | 2009-09-23 11:22:08 -0500 | [diff] [blame] | 992 | #ifdef PNG_tRNS_SUPPORTED |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 993 | void PNGAPI |
John Bowler | 5d56786 | 2011-12-24 09:12:00 -0600 | [diff] [blame] | 994 | png_set_tRNS(png_structrp png_ptr, png_inforp info_ptr, |
Glenn Randers-Pehrson | e600c51 | 2010-08-18 07:25:46 -0500 | [diff] [blame] | 995 | 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] | 996 | { |
Glenn Randers-Pehrson | 51650b8 | 2008-08-05 07:44:42 -0500 | [diff] [blame] | 997 | png_debug1(1, "in %s storage function", "tRNS"); |
Glenn Randers-Pehrson | da00980 | 2009-08-15 13:25:47 -0500 | [diff] [blame] | 998 | |
Glenn Randers-Pehrson | a357b99 | 1998-02-08 20:56:40 -0600 | [diff] [blame] | 999 | if (png_ptr == NULL || info_ptr == NULL) |
Glenn Randers-Pehrson | bd76965 | 2015-01-27 06:53:56 -0600 | [diff] [blame] | 1000 | |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1001 | return; |
| 1002 | |
Glenn Randers-Pehrson | 6abea75 | 2009-08-08 16:52:06 -0500 | [diff] [blame] | 1003 | if (trans_alpha != NULL) |
Glenn Randers-Pehrson | 76e5fd6 | 2000-12-28 07:50:05 -0600 | [diff] [blame] | 1004 | { |
Glenn Randers-Pehrson | ef29a5e | 2009-10-31 19:37:05 -0500 | [diff] [blame] | 1005 | /* 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] | 1006 | * we do it for backward compatibility with the way the png_handle_tRNS |
| 1007 | * function used to do the allocation. |
John Bowler | 4f67e40 | 2011-12-28 08:43:37 -0600 | [diff] [blame] | 1008 | * |
| 1009 | * 1.6.0: The above statement is incorrect; png_handle_tRNS effectively |
| 1010 | * relies on png_set_tRNS storing the information in png_struct |
| 1011 | * (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] | 1012 | */ |
Glenn Randers-Pehrson | 145f5c8 | 2008-07-10 09:13:13 -0500 | [diff] [blame] | 1013 | |
Glenn Randers-Pehrson | 76e5fd6 | 2000-12-28 07:50:05 -0600 | [diff] [blame] | 1014 | png_free_data(png_ptr, info_ptr, PNG_FREE_TRNS, 0); |
Glenn Randers-Pehrson | 145f5c8 | 2008-07-10 09:13:13 -0500 | [diff] [blame] | 1015 | |
Glenn Randers-Pehrson | 145f5c8 | 2008-07-10 09:13:13 -0500 | [diff] [blame] | 1016 | if (num_trans > 0 && num_trans <= PNG_MAX_PALETTE_LENGTH) |
Glenn Randers-Pehrson | 8d16725 | 2016-05-27 19:55:44 -0500 | [diff] [blame] | 1017 | { |
| 1018 | /* Changed from num_trans to PNG_MAX_PALETTE_LENGTH in version 1.2.1 */ |
Glenn Randers-Pehrson | 6c7459e | 2016-05-27 20:09:23 -0500 | [diff] [blame] | 1019 | info_ptr->trans_alpha = png_voidcast(png_bytep, |
Glenn Randers-Pehrson | 2f8b82e | 2017-10-29 10:30:42 -0500 | [diff] [blame] | 1020 | png_malloc(png_ptr, PNG_MAX_PALETTE_LENGTH)); |
Cosmin Truta | a74aa9a | 2018-06-17 22:37:44 -0400 | [diff] [blame] | 1021 | memcpy(info_ptr->trans_alpha, trans_alpha, (size_t)num_trans); |
Glenn Randers-Pehrson | 8d16725 | 2016-05-27 19:55:44 -0500 | [diff] [blame] | 1022 | } |
Glenn Randers-Pehrson | 6c7459e | 2016-05-27 20:09:23 -0500 | [diff] [blame] | 1023 | png_ptr->trans_alpha = info_ptr->trans_alpha; |
Glenn Randers-Pehrson | 76e5fd6 | 2000-12-28 07:50:05 -0600 | [diff] [blame] | 1024 | } |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1025 | |
Glenn Randers-Pehrson | 56f6396 | 2008-10-06 10:16:17 -0500 | [diff] [blame] | 1026 | if (trans_color != NULL) |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1027 | { |
Glenn Randers-Pehrson | 9bddba2 | 2017-10-17 16:22:22 -0500 | [diff] [blame] | 1028 | #ifdef PNG_WARNINGS_SUPPORTED |
Glenn Randers-Pehrson | 2f56fe4 | 2015-01-13 09:25:48 -0600 | [diff] [blame] | 1029 | if (info_ptr->bit_depth < 16) |
| 1030 | { |
Glenn Randers-Pehrson | bd76965 | 2015-01-27 06:53:56 -0600 | [diff] [blame] | 1031 | int sample_max = (1 << info_ptr->bit_depth) - 1; |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 1032 | |
Glenn Randers-Pehrson | 2f56fe4 | 2015-01-13 09:25:48 -0600 | [diff] [blame] | 1033 | if ((info_ptr->color_type == PNG_COLOR_TYPE_GRAY && |
| 1034 | trans_color->gray > sample_max) || |
| 1035 | (info_ptr->color_type == PNG_COLOR_TYPE_RGB && |
| 1036 | (trans_color->red > sample_max || |
| 1037 | trans_color->green > sample_max || |
| 1038 | trans_color->blue > sample_max))) |
Glenn Randers-Pehrson | bd76965 | 2015-01-27 06:53:56 -0600 | [diff] [blame] | 1039 | png_warning(png_ptr, |
Glenn Randers-Pehrson | dd70604 | 2016-07-15 11:20:46 -0500 | [diff] [blame] | 1040 | "tRNS chunk has out-of-range samples for bit_depth"); |
Glenn Randers-Pehrson | 2f56fe4 | 2015-01-13 09:25:48 -0600 | [diff] [blame] | 1041 | } |
Glenn Randers-Pehrson | 9bddba2 | 2017-10-17 16:22:22 -0500 | [diff] [blame] | 1042 | #endif |
Glenn Randers-Pehrson | bd76965 | 2015-01-27 06:53:56 -0600 | [diff] [blame] | 1043 | |
| 1044 | info_ptr->trans_color = *trans_color; |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 1045 | |
Glenn Randers-Pehrson | 3b5bcea | 2017-10-17 15:20:31 -0500 | [diff] [blame] | 1046 | if (num_trans == 0) |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 1047 | num_trans = 1; |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1048 | } |
Glenn Randers-Pehrson | 145f5c8 | 2008-07-10 09:13:13 -0500 | [diff] [blame] | 1049 | |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1050 | info_ptr->num_trans = (png_uint_16)num_trans; |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 1051 | |
Glenn Randers-Pehrson | 145f5c8 | 2008-07-10 09:13:13 -0500 | [diff] [blame] | 1052 | if (num_trans != 0) |
| 1053 | { |
| 1054 | info_ptr->valid |= PNG_INFO_tRNS; |
Glenn Randers-Pehrson | 145f5c8 | 2008-07-10 09:13:13 -0500 | [diff] [blame] | 1055 | info_ptr->free_me |= PNG_FREE_TRNS; |
Glenn Randers-Pehrson | 145f5c8 | 2008-07-10 09:13:13 -0500 | [diff] [blame] | 1056 | } |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1057 | } |
| 1058 | #endif |
| 1059 | |
Glenn Randers-Pehrson | e26c095 | 2009-09-23 11:22:08 -0500 | [diff] [blame] | 1060 | #ifdef PNG_sPLT_SUPPORTED |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 1061 | void PNGAPI |
John Bowler | 4f67e40 | 2011-12-28 08:43:37 -0600 | [diff] [blame] | 1062 | png_set_sPLT(png_const_structrp png_ptr, |
John Bowler | 5d56786 | 2011-12-24 09:12:00 -0600 | [diff] [blame] | 1063 | png_inforp info_ptr, png_const_sPLT_tp entries, int nentries) |
Glenn Randers-Pehrson | 3779c69 | 2006-11-07 20:38:11 -0600 | [diff] [blame] | 1064 | /* |
| 1065 | * entries - array of png_sPLT_t structures |
| 1066 | * to be added to the list of palettes |
| 1067 | * in the info structure. |
Glenn Randers-Pehrson | 62333ba | 2010-10-23 08:48:51 -0500 | [diff] [blame] | 1068 | * |
Glenn Randers-Pehrson | 3779c69 | 2006-11-07 20:38:11 -0600 | [diff] [blame] | 1069 | * nentries - number of palette structures to be |
| 1070 | * added. |
| 1071 | */ |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1072 | { |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 1073 | png_sPLT_tp np; |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1074 | |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 1075 | if (png_ptr == NULL || info_ptr == NULL || nentries <= 0 || entries == NULL) |
Glenn Randers-Pehrson | 07748d1 | 2002-05-25 11:12:10 -0500 | [diff] [blame] | 1076 | return; |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1077 | |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 1078 | /* Use the internal realloc function, which checks for all the possible |
| 1079 | * overflows. Notice that the parameters are (int) and (size_t) |
| 1080 | */ |
| 1081 | np = png_voidcast(png_sPLT_tp,png_realloc_array(png_ptr, |
Glenn Randers-Pehrson | dd70604 | 2016-07-15 11:20:46 -0500 | [diff] [blame] | 1082 | info_ptr->splt_palettes, info_ptr->splt_palettes_num, nentries, |
| 1083 | sizeof *np)); |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 1084 | |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 1085 | if (np == NULL) |
| 1086 | { |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 1087 | /* Out of memory or too many chunks */ |
| 1088 | png_chunk_report(png_ptr, "too many sPLT chunks", PNG_CHUNK_WRITE_ERROR); |
Glenn Randers-Pehrson | bd76965 | 2015-01-27 06:53:56 -0600 | [diff] [blame] | 1089 | |
Glenn Randers-Pehrson | f81b50b | 2009-12-29 16:50:15 -0600 | [diff] [blame] | 1090 | return; |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 1091 | } |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1092 | |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 1093 | png_free(png_ptr, info_ptr->splt_palettes); |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 1094 | info_ptr->splt_palettes = np; |
| 1095 | info_ptr->free_me |= PNG_FREE_SPLT; |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1096 | |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 1097 | np += info_ptr->splt_palettes_num; |
| 1098 | |
| 1099 | do |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 1100 | { |
Cosmin Truta | a74aa9a | 2018-06-17 22:37:44 -0400 | [diff] [blame] | 1101 | size_t length; |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 1102 | |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 1103 | /* Skip invalid input entries */ |
| 1104 | if (entries->name == NULL || entries->entries == NULL) |
| 1105 | { |
| 1106 | /* png_handle_sPLT doesn't do this, so this is an app error */ |
| 1107 | png_app_error(png_ptr, "png_set_sPLT: invalid sPLT"); |
| 1108 | /* Just skip the invalid entry */ |
| 1109 | continue; |
| 1110 | } |
| 1111 | |
| 1112 | np->depth = entries->depth; |
| 1113 | |
Glenn Randers-Pehrson | 9127138 | 2014-10-03 20:23:31 -0500 | [diff] [blame] | 1114 | /* In the event of out-of-memory just return - there's no point keeping |
| 1115 | * on trying to add sPLT chunks. |
Glenn Randers-Pehrson | f3af706 | 2012-02-02 23:11:45 -0600 | [diff] [blame] | 1116 | */ |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 1117 | length = strlen(entries->name) + 1; |
| 1118 | np->name = png_voidcast(png_charp, png_malloc_base(png_ptr, length)); |
Glenn Randers-Pehrson | f3af706 | 2012-02-02 23:11:45 -0600 | [diff] [blame] | 1119 | |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 1120 | if (np->name == NULL) |
| 1121 | break; |
Glenn Randers-Pehrson | f3af706 | 2012-02-02 23:11:45 -0600 | [diff] [blame] | 1122 | |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 1123 | memcpy(np->name, entries->name, length); |
Glenn Randers-Pehrson | f3af706 | 2012-02-02 23:11:45 -0600 | [diff] [blame] | 1124 | |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 1125 | /* IMPORTANT: we have memory now that won't get freed if something else |
Glenn Randers-Pehrson | 9127138 | 2014-10-03 20:23:31 -0500 | [diff] [blame] | 1126 | * goes wrong; this code must free it. png_malloc_array produces no |
| 1127 | * warnings; use a png_chunk_report (below) if there is an error. |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 1128 | */ |
| 1129 | np->entries = png_voidcast(png_sPLT_entryp, png_malloc_array(png_ptr, |
| 1130 | entries->nentries, sizeof (png_sPLT_entry))); |
| 1131 | |
| 1132 | if (np->entries == NULL) |
John Bowler | 2414bd9 | 2013-01-19 23:18:59 -0600 | [diff] [blame] | 1133 | { |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 1134 | png_free(png_ptr, np->name); |
Glenn Randers-Pehrson | 11d4a2a | 2014-10-29 08:23:19 -0500 | [diff] [blame] | 1135 | np->name = NULL; |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 1136 | break; |
John Bowler | 2414bd9 | 2013-01-19 23:18:59 -0600 | [diff] [blame] | 1137 | } |
| 1138 | |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 1139 | np->nentries = entries->nentries; |
| 1140 | /* This multiply can't overflow because png_malloc_array has already |
| 1141 | * checked it when doing the allocation. |
| 1142 | */ |
| 1143 | memcpy(np->entries, entries->entries, |
Glenn Randers-Pehrson | 3875d9a | 2016-10-02 17:08:46 -0500 | [diff] [blame] | 1144 | (unsigned int)entries->nentries * sizeof (png_sPLT_entry)); |
John Bowler | 2414bd9 | 2013-01-19 23:18:59 -0600 | [diff] [blame] | 1145 | |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 1146 | /* Note that 'continue' skips the advance of the out pointer and out |
| 1147 | * count, so an invalid entry is not added. |
| 1148 | */ |
| 1149 | info_ptr->valid |= PNG_INFO_sPLT; |
| 1150 | ++(info_ptr->splt_palettes_num); |
| 1151 | ++np; |
Viktor Szakats | 8c50acb | 2017-03-29 23:54:40 +0000 | [diff] [blame] | 1152 | ++entries; |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 1153 | } |
Viktor Szakats | 8c50acb | 2017-03-29 23:54:40 +0000 | [diff] [blame] | 1154 | while (--nentries); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1155 | |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 1156 | if (nentries > 0) |
| 1157 | 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] | 1158 | } |
Glenn Randers-Pehrson | cda68df | 2014-11-06 22:11:39 -0600 | [diff] [blame] | 1159 | #endif /* sPLT */ |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1160 | |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 1161 | #ifdef PNG_STORE_UNKNOWN_CHUNKS_SUPPORTED |
| 1162 | static png_byte |
| 1163 | check_location(png_const_structrp png_ptr, int location) |
| 1164 | { |
| 1165 | location &= (PNG_HAVE_IHDR|PNG_HAVE_PLTE|PNG_AFTER_IDAT); |
| 1166 | |
| 1167 | /* New in 1.6.0; copy the location and check it. This is an API |
Glenn Randers-Pehrson | 9127138 | 2014-10-03 20:23:31 -0500 | [diff] [blame] | 1168 | * change; previously the app had to use the |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 1169 | * png_set_unknown_chunk_location API below for each chunk. |
| 1170 | */ |
Glenn Randers-Pehrson | 5d713fe | 2014-10-31 20:48:55 -0500 | [diff] [blame] | 1171 | if (location == 0 && (png_ptr->mode & PNG_IS_READ_STRUCT) == 0) |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 1172 | { |
| 1173 | /* Write struct, so unknown chunks come from the app */ |
| 1174 | png_app_warning(png_ptr, |
Glenn Randers-Pehrson | dd70604 | 2016-07-15 11:20:46 -0500 | [diff] [blame] | 1175 | "png_set_unknown_chunks now expects a valid location"); |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 1176 | /* Use the old behavior */ |
| 1177 | location = (png_byte)(png_ptr->mode & |
Glenn Randers-Pehrson | dd70604 | 2016-07-15 11:20:46 -0500 | [diff] [blame] | 1178 | (PNG_HAVE_IHDR|PNG_HAVE_PLTE|PNG_AFTER_IDAT)); |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 1179 | } |
| 1180 | |
| 1181 | /* This need not be an internal error - if the app calls |
| 1182 | * png_set_unknown_chunks on a read pointer it must get the location right. |
| 1183 | */ |
| 1184 | if (location == 0) |
| 1185 | png_error(png_ptr, "invalid location in png_set_unknown_chunks"); |
| 1186 | |
| 1187 | /* Now reduce the location to the top-most set bit by removing each least |
| 1188 | * significant bit in turn. |
| 1189 | */ |
| 1190 | while (location != (location & -location)) |
| 1191 | location &= ~(location & -location); |
| 1192 | |
| 1193 | /* The cast is safe because 'location' is a bit mask and only the low four |
| 1194 | * bits are significant. |
| 1195 | */ |
| 1196 | return (png_byte)location; |
| 1197 | } |
| 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_chunks(png_const_structrp png_ptr, |
Glenn Randers-Pehrson | dd70604 | 2016-07-15 11:20:46 -0500 | [diff] [blame] | 1201 | 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] | 1202 | { |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 1203 | png_unknown_chunkp np; |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1204 | |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 1205 | if (png_ptr == NULL || info_ptr == NULL || num_unknowns <= 0 || |
Glenn Randers-Pehrson | bd76965 | 2015-01-27 06:53:56 -0600 | [diff] [blame] | 1206 | unknowns == NULL) |
Glenn Randers-Pehrson | 83fb855 | 2009-06-16 17:52:23 -0500 | [diff] [blame] | 1207 | return; |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 1208 | |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 1209 | /* Check for the failure cases where support has been disabled at compile |
| 1210 | * time. This code is hardly ever compiled - it's here because |
| 1211 | * STORE_UNKNOWN_CHUNKS is set by both read and write code (compiling in this |
| 1212 | * code) but may be meaningless if the read or write handling of unknown |
| 1213 | * chunks is not compiled in. |
| 1214 | */ |
| 1215 | # if !defined(PNG_READ_UNKNOWN_CHUNKS_SUPPORTED) && \ |
| 1216 | defined(PNG_READ_SUPPORTED) |
Glenn Randers-Pehrson | 5d713fe | 2014-10-31 20:48:55 -0500 | [diff] [blame] | 1217 | if ((png_ptr->mode & PNG_IS_READ_STRUCT) != 0) |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 1218 | { |
| 1219 | png_app_error(png_ptr, "no unknown chunk support on read"); |
Glenn Randers-Pehrson | bd76965 | 2015-01-27 06:53:56 -0600 | [diff] [blame] | 1220 | |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 1221 | return; |
| 1222 | } |
| 1223 | # endif |
| 1224 | # if !defined(PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED) && \ |
| 1225 | defined(PNG_WRITE_SUPPORTED) |
Glenn Randers-Pehrson | 5d713fe | 2014-10-31 20:48:55 -0500 | [diff] [blame] | 1226 | if ((png_ptr->mode & PNG_IS_READ_STRUCT) == 0) |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 1227 | { |
| 1228 | png_app_error(png_ptr, "no unknown chunk support on write"); |
Glenn Randers-Pehrson | bd76965 | 2015-01-27 06:53:56 -0600 | [diff] [blame] | 1229 | |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 1230 | return; |
| 1231 | } |
| 1232 | # endif |
| 1233 | |
| 1234 | /* Prior to 1.6.0 this code used png_malloc_warn; however, this meant that |
| 1235 | * unknown critical chunks could be lost with just a warning resulting in |
| 1236 | * undefined behavior. Now png_chunk_report is used to provide behavior |
| 1237 | * appropriate to read or write. |
| 1238 | */ |
| 1239 | np = png_voidcast(png_unknown_chunkp, png_realloc_array(png_ptr, |
Glenn Randers-Pehrson | dd70604 | 2016-07-15 11:20:46 -0500 | [diff] [blame] | 1240 | info_ptr->unknown_chunks, info_ptr->unknown_chunks_num, num_unknowns, |
| 1241 | sizeof *np)); |
Glenn Randers-Pehrson | 590c8b0 | 2013-01-19 08:49:12 -0600 | [diff] [blame] | 1242 | |
| 1243 | if (np == NULL) |
| 1244 | { |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 1245 | png_chunk_report(png_ptr, "too many unknown chunks", |
Glenn Randers-Pehrson | dd70604 | 2016-07-15 11:20:46 -0500 | [diff] [blame] | 1246 | PNG_CHUNK_WRITE_ERROR); |
Glenn Randers-Pehrson | bd76965 | 2015-01-27 06:53:56 -0600 | [diff] [blame] | 1247 | |
John Bowler | 1c6e22a | 2013-01-10 10:55:34 -0600 | [diff] [blame] | 1248 | return; |
| 1249 | } |
| 1250 | |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 1251 | png_free(png_ptr, info_ptr->unknown_chunks); |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 1252 | info_ptr->unknown_chunks = np; /* safe because it is initialized */ |
| 1253 | info_ptr->free_me |= PNG_FREE_UNKN; |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1254 | |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 1255 | np += info_ptr->unknown_chunks_num; |
| 1256 | |
| 1257 | /* Increment unknown_chunks_num each time round the loop to protect the |
| 1258 | * just-allocated chunk data. |
| 1259 | */ |
| 1260 | for (; num_unknowns > 0; --num_unknowns, ++unknowns) |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 1261 | { |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 1262 | memcpy(np->name, unknowns->name, (sizeof np->name)); |
| 1263 | np->name[(sizeof np->name)-1] = '\0'; |
| 1264 | np->location = check_location(png_ptr, unknowns->location); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1265 | |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 1266 | if (unknowns->size == 0) |
| 1267 | { |
| 1268 | np->data = NULL; |
| 1269 | np->size = 0; |
| 1270 | } |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 1271 | |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 1272 | else |
| 1273 | { |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 1274 | np->data = png_voidcast(png_bytep, |
Glenn Randers-Pehrson | dd70604 | 2016-07-15 11:20:46 -0500 | [diff] [blame] | 1275 | png_malloc_base(png_ptr, unknowns->size)); |
John Bowler | 2414bd9 | 2013-01-19 23:18:59 -0600 | [diff] [blame] | 1276 | |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 1277 | if (np->data == NULL) |
John Bowler | 2414bd9 | 2013-01-19 23:18:59 -0600 | [diff] [blame] | 1278 | { |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 1279 | png_chunk_report(png_ptr, "unknown chunk: out of memory", |
Glenn Randers-Pehrson | dd70604 | 2016-07-15 11:20:46 -0500 | [diff] [blame] | 1280 | PNG_CHUNK_WRITE_ERROR); |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 1281 | /* But just skip storing the unknown chunk */ |
| 1282 | continue; |
John Bowler | 2414bd9 | 2013-01-19 23:18:59 -0600 | [diff] [blame] | 1283 | } |
| 1284 | |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 1285 | memcpy(np->data, unknowns->data, unknowns->size); |
| 1286 | np->size = unknowns->size; |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 1287 | } |
Glenn Randers-Pehrson | f3af706 | 2012-02-02 23:11:45 -0600 | [diff] [blame] | 1288 | |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 1289 | /* These increments are skipped on out-of-memory for the data - the |
| 1290 | * unknown chunk entry gets overwritten if the png_chunk_report returns. |
| 1291 | * This is correct in the read case (the chunk is just dropped.) |
| 1292 | */ |
| 1293 | ++np; |
| 1294 | ++(info_ptr->unknown_chunks_num); |
| 1295 | } |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1296 | } |
Glenn Randers-Pehrson | 67439c4 | 2010-08-19 07:01:09 -0500 | [diff] [blame] | 1297 | |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 1298 | void PNGAPI |
John Bowler | 4f67e40 | 2011-12-28 08:43:37 -0600 | [diff] [blame] | 1299 | 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] | 1300 | int chunk, int location) |
Glenn Randers-Pehrson | 228bd39 | 2000-04-23 23:14:02 -0500 | [diff] [blame] | 1301 | { |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 1302 | /* This API is pretty pointless in 1.6.0 because the location can be set |
| 1303 | * before the call to png_set_unknown_chunks. |
| 1304 | * |
| 1305 | * TODO: add a png_app_warning in 1.7 |
| 1306 | */ |
| 1307 | if (png_ptr != NULL && info_ptr != NULL && chunk >= 0 && |
| 1308 | chunk < info_ptr->unknown_chunks_num) |
| 1309 | { |
| 1310 | if ((location & (PNG_HAVE_IHDR|PNG_HAVE_PLTE|PNG_AFTER_IDAT)) == 0) |
| 1311 | { |
| 1312 | png_app_error(png_ptr, "invalid unknown chunk location"); |
| 1313 | /* Fake out the pre 1.6.0 behavior: */ |
Glenn Randers-Pehrson | 3875d9a | 2016-10-02 17:08:46 -0500 | [diff] [blame] | 1314 | if (((unsigned int)location & PNG_HAVE_IDAT) != 0) /* undocumented! */ |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 1315 | location = PNG_AFTER_IDAT; |
| 1316 | |
| 1317 | else |
| 1318 | location = PNG_HAVE_IHDR; /* also undocumented */ |
| 1319 | } |
| 1320 | |
| 1321 | info_ptr->unknown_chunks[chunk].location = |
| 1322 | check_location(png_ptr, location); |
| 1323 | } |
Glenn Randers-Pehrson | 228bd39 | 2000-04-23 23:14:02 -0500 | [diff] [blame] | 1324 | } |
Glenn Randers-Pehrson | 217d38c | 2015-03-07 10:35:03 -0600 | [diff] [blame] | 1325 | #endif /* STORE_UNKNOWN_CHUNKS */ |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1326 | |
Glenn Randers-Pehrson | e26c095 | 2009-09-23 11:22:08 -0500 | [diff] [blame] | 1327 | #ifdef PNG_MNG_FEATURES_SUPPORTED |
Glenn Randers-Pehrson | 5e5c1e1 | 2000-11-10 12:26:19 -0600 | [diff] [blame] | 1328 | png_uint_32 PNGAPI |
John Bowler | 5d56786 | 2011-12-24 09:12:00 -0600 | [diff] [blame] | 1329 | 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] | 1330 | { |
Glenn Randers-Pehrson | 51650b8 | 2008-08-05 07:44:42 -0500 | [diff] [blame] | 1331 | png_debug(1, "in png_permit_mng_features"); |
Glenn Randers-Pehrson | da00980 | 2009-08-15 13:25:47 -0500 | [diff] [blame] | 1332 | |
Glenn Randers-Pehrson | 5e5c1e1 | 2000-11-10 12:26:19 -0600 | [diff] [blame] | 1333 | if (png_ptr == NULL) |
John Bowler | 4f67e40 | 2011-12-28 08:43:37 -0600 | [diff] [blame] | 1334 | return 0; |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 1335 | |
John Bowler | 4f67e40 | 2011-12-28 08:43:37 -0600 | [diff] [blame] | 1336 | png_ptr->mng_features_permitted = mng_features & PNG_ALL_MNG_FEATURES; |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 1337 | |
John Bowler | 4f67e40 | 2011-12-28 08:43:37 -0600 | [diff] [blame] | 1338 | return png_ptr->mng_features_permitted; |
Glenn Randers-Pehrson | 4393a9a | 1999-09-17 12:27:26 -0500 | [diff] [blame] | 1339 | } |
| 1340 | #endif |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1341 | |
Glenn Randers-Pehrson | 6ba9088 | 2009-12-25 14:26:13 -0600 | [diff] [blame] | 1342 | #ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 1343 | static unsigned int |
| 1344 | add_one_chunk(png_bytep list, unsigned int count, png_const_bytep add, int keep) |
| 1345 | { |
| 1346 | unsigned int i; |
| 1347 | |
| 1348 | /* Utility function: update the 'keep' state of a chunk if it is already in |
| 1349 | * the list, otherwise add it to the list. |
| 1350 | */ |
Glenn Randers-Pehrson | 5d713fe | 2014-10-31 20:48:55 -0500 | [diff] [blame] | 1351 | for (i=0; i<count; ++i, list += 5) |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 1352 | { |
Glenn Randers-Pehrson | 5d713fe | 2014-10-31 20:48:55 -0500 | [diff] [blame] | 1353 | if (memcmp(list, add, 4) == 0) |
| 1354 | { |
| 1355 | list[4] = (png_byte)keep; |
Glenn Randers-Pehrson | bd76965 | 2015-01-27 06:53:56 -0600 | [diff] [blame] | 1356 | |
Glenn Randers-Pehrson | 5d713fe | 2014-10-31 20:48:55 -0500 | [diff] [blame] | 1357 | return count; |
| 1358 | } |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 1359 | } |
| 1360 | |
| 1361 | if (keep != PNG_HANDLE_CHUNK_AS_DEFAULT) |
| 1362 | { |
| 1363 | ++count; |
| 1364 | memcpy(list, add, 4); |
| 1365 | list[4] = (png_byte)keep; |
| 1366 | } |
| 1367 | |
| 1368 | return count; |
| 1369 | } |
| 1370 | |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 1371 | void PNGAPI |
John Bowler | e956751 | 2012-08-15 22:53:00 -0500 | [diff] [blame] | 1372 | png_set_keep_unknown_chunks(png_structrp png_ptr, int keep, |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 1373 | png_const_bytep chunk_list, int num_chunks_in) |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 1374 | { |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 1375 | png_bytep new_list; |
| 1376 | unsigned int num_chunks, old_num_chunks; |
| 1377 | |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 1378 | if (png_ptr == NULL) |
| 1379 | return; |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 1380 | |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 1381 | if (keep < 0 || keep >= PNG_HANDLE_CHUNK_LAST) |
John Bowler | aa9dea5 | 2012-08-10 19:04:08 -0500 | [diff] [blame] | 1382 | { |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 1383 | png_app_error(png_ptr, "png_set_keep_unknown_chunks: invalid keep"); |
Glenn Randers-Pehrson | bd76965 | 2015-01-27 06:53:56 -0600 | [diff] [blame] | 1384 | |
John Bowler | e956751 | 2012-08-15 22:53:00 -0500 | [diff] [blame] | 1385 | return; |
John Bowler | aa9dea5 | 2012-08-10 19:04:08 -0500 | [diff] [blame] | 1386 | } |
| 1387 | |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 1388 | if (num_chunks_in <= 0) |
| 1389 | { |
| 1390 | png_ptr->unknown_default = keep; |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 1391 | |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 1392 | /* '0' means just set the flags, so stop here */ |
| 1393 | if (num_chunks_in == 0) |
| 1394 | return; |
| 1395 | } |
| 1396 | |
| 1397 | if (num_chunks_in < 0) |
| 1398 | { |
| 1399 | /* Ignore all unknown chunks and all chunks recognized by |
| 1400 | * libpng except for IHDR, PLTE, tRNS, IDAT, and IEND |
| 1401 | */ |
Cosmin Truta | 1ef8882 | 2018-08-18 21:01:02 -0400 | [diff] [blame] | 1402 | static const png_byte chunks_to_ignore[] = { |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 1403 | 98, 75, 71, 68, '\0', /* bKGD */ |
| 1404 | 99, 72, 82, 77, '\0', /* cHRM */ |
Glenn Randers-Pehrson | 0ec733c | 2017-08-05 08:01:53 -0500 | [diff] [blame] | 1405 | 101, 88, 73, 102, '\0', /* eXIf */ |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 1406 | 103, 65, 77, 65, '\0', /* gAMA */ |
| 1407 | 104, 73, 83, 84, '\0', /* hIST */ |
| 1408 | 105, 67, 67, 80, '\0', /* iCCP */ |
| 1409 | 105, 84, 88, 116, '\0', /* iTXt */ |
| 1410 | 111, 70, 70, 115, '\0', /* oFFs */ |
| 1411 | 112, 67, 65, 76, '\0', /* pCAL */ |
| 1412 | 112, 72, 89, 115, '\0', /* pHYs */ |
| 1413 | 115, 66, 73, 84, '\0', /* sBIT */ |
| 1414 | 115, 67, 65, 76, '\0', /* sCAL */ |
| 1415 | 115, 80, 76, 84, '\0', /* sPLT */ |
| 1416 | 115, 84, 69, 82, '\0', /* sTER */ |
| 1417 | 115, 82, 71, 66, '\0', /* sRGB */ |
| 1418 | 116, 69, 88, 116, '\0', /* tEXt */ |
| 1419 | 116, 73, 77, 69, '\0', /* tIME */ |
| 1420 | 122, 84, 88, 116, '\0' /* zTXt */ |
| 1421 | }; |
| 1422 | |
| 1423 | chunk_list = chunks_to_ignore; |
John Bowler | 03df189 | 2014-11-05 17:19:36 -0600 | [diff] [blame] | 1424 | num_chunks = (unsigned int)/*SAFE*/(sizeof chunks_to_ignore)/5U; |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 1425 | } |
| 1426 | |
| 1427 | else /* num_chunks_in > 0 */ |
| 1428 | { |
| 1429 | if (chunk_list == NULL) |
| 1430 | { |
| 1431 | /* Prior to 1.6.0 this was silently ignored, now it is an app_error |
| 1432 | * which can be switched off. |
| 1433 | */ |
| 1434 | png_app_error(png_ptr, "png_set_keep_unknown_chunks: no chunk list"); |
Glenn Randers-Pehrson | bd76965 | 2015-01-27 06:53:56 -0600 | [diff] [blame] | 1435 | |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 1436 | return; |
| 1437 | } |
| 1438 | |
Glenn Randers-Pehrson | 3875d9a | 2016-10-02 17:08:46 -0500 | [diff] [blame] | 1439 | num_chunks = (unsigned int)num_chunks_in; |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 1440 | } |
John Bowler | fcd301d | 2011-12-28 21:34:27 -0600 | [diff] [blame] | 1441 | |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 1442 | old_num_chunks = png_ptr->num_chunk_list; |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 1443 | if (png_ptr->chunk_list == NULL) |
| 1444 | old_num_chunks = 0; |
John Bowler | aa9dea5 | 2012-08-10 19:04:08 -0500 | [diff] [blame] | 1445 | |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 1446 | /* Since num_chunks is always restricted to UINT_MAX/5 this can't overflow. |
| 1447 | */ |
| 1448 | if (num_chunks + old_num_chunks > UINT_MAX/5) |
John Bowler | aa9dea5 | 2012-08-10 19:04:08 -0500 | [diff] [blame] | 1449 | { |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 1450 | png_app_error(png_ptr, "png_set_keep_unknown_chunks: too many chunks"); |
Glenn Randers-Pehrson | bd76965 | 2015-01-27 06:53:56 -0600 | [diff] [blame] | 1451 | |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 1452 | return; |
John Bowler | aa9dea5 | 2012-08-10 19:04:08 -0500 | [diff] [blame] | 1453 | } |
| 1454 | |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 1455 | /* If these chunks are being reset to the default then no more memory is |
| 1456 | * required because add_one_chunk above doesn't extend the list if the 'keep' |
| 1457 | * parameter is the default. |
| 1458 | */ |
Glenn Randers-Pehrson | 0567015 | 2014-03-08 12:39:52 -0600 | [diff] [blame] | 1459 | if (keep != 0) |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 1460 | { |
| 1461 | new_list = png_voidcast(png_bytep, png_malloc(png_ptr, |
| 1462 | 5 * (num_chunks + old_num_chunks))); |
John Bowler | e956751 | 2012-08-15 22:53:00 -0500 | [diff] [blame] | 1463 | |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 1464 | if (old_num_chunks > 0) |
| 1465 | memcpy(new_list, png_ptr->chunk_list, 5*old_num_chunks); |
| 1466 | } |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 1467 | |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 1468 | else if (old_num_chunks > 0) |
| 1469 | new_list = png_ptr->chunk_list; |
| 1470 | |
| 1471 | else |
| 1472 | new_list = NULL; |
| 1473 | |
| 1474 | /* Add the new chunks together with each one's handling code. If the chunk |
| 1475 | * already exists the code is updated, otherwise the chunk is added to the |
| 1476 | * end. (In libpng 1.6.0 order no longer matters because this code enforces |
| 1477 | * the earlier convention that the last setting is the one that is used.) |
| 1478 | */ |
| 1479 | if (new_list != NULL) |
| 1480 | { |
| 1481 | png_const_bytep inlist; |
| 1482 | png_bytep outlist; |
| 1483 | unsigned int i; |
| 1484 | |
| 1485 | for (i=0; i<num_chunks; ++i) |
Glenn Randers-Pehrson | 5d713fe | 2014-10-31 20:48:55 -0500 | [diff] [blame] | 1486 | { |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 1487 | old_num_chunks = add_one_chunk(new_list, old_num_chunks, |
Glenn Randers-Pehrson | dd70604 | 2016-07-15 11:20:46 -0500 | [diff] [blame] | 1488 | chunk_list+5*i, keep); |
Glenn Randers-Pehrson | 5d713fe | 2014-10-31 20:48:55 -0500 | [diff] [blame] | 1489 | } |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 1490 | |
| 1491 | /* Now remove any spurious 'default' entries. */ |
| 1492 | num_chunks = 0; |
| 1493 | for (i=0, inlist=outlist=new_list; i<old_num_chunks; ++i, inlist += 5) |
Glenn Randers-Pehrson | 5d713fe | 2014-10-31 20:48:55 -0500 | [diff] [blame] | 1494 | { |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 1495 | if (inlist[4]) |
| 1496 | { |
| 1497 | if (outlist != inlist) |
| 1498 | memcpy(outlist, inlist, 5); |
| 1499 | outlist += 5; |
| 1500 | ++num_chunks; |
| 1501 | } |
Glenn Randers-Pehrson | 5d713fe | 2014-10-31 20:48:55 -0500 | [diff] [blame] | 1502 | } |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 1503 | |
| 1504 | /* This means the application has removed all the specialized handling. */ |
| 1505 | if (num_chunks == 0) |
| 1506 | { |
| 1507 | if (png_ptr->chunk_list != new_list) |
| 1508 | png_free(png_ptr, new_list); |
| 1509 | |
| 1510 | new_list = NULL; |
| 1511 | } |
| 1512 | } |
| 1513 | |
| 1514 | else |
| 1515 | num_chunks = 0; |
| 1516 | |
| 1517 | png_ptr->num_chunk_list = num_chunks; |
| 1518 | |
| 1519 | if (png_ptr->chunk_list != new_list) |
| 1520 | { |
| 1521 | if (png_ptr->chunk_list != NULL) |
| 1522 | png_free(png_ptr, png_ptr->chunk_list); |
| 1523 | |
| 1524 | png_ptr->chunk_list = new_list; |
| 1525 | } |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 1526 | } |
| 1527 | #endif |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1528 | |
Glenn Randers-Pehrson | e26c095 | 2009-09-23 11:22:08 -0500 | [diff] [blame] | 1529 | #ifdef PNG_READ_USER_CHUNKS_SUPPORTED |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 1530 | void PNGAPI |
John Bowler | 5d56786 | 2011-12-24 09:12:00 -0600 | [diff] [blame] | 1531 | 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] | 1532 | png_user_chunk_ptr read_user_chunk_fn) |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 1533 | { |
Glenn Randers-Pehrson | 51650b8 | 2008-08-05 07:44:42 -0500 | [diff] [blame] | 1534 | png_debug(1, "in png_set_read_user_chunk_fn"); |
Glenn Randers-Pehrson | da00980 | 2009-08-15 13:25:47 -0500 | [diff] [blame] | 1535 | |
Glenn Randers-Pehrson | 170b70c | 2006-03-10 10:19:04 -0600 | [diff] [blame] | 1536 | if (png_ptr == NULL) |
| 1537 | return; |
Glenn Randers-Pehrson | b3ce365 | 2009-08-15 21:47:03 -0500 | [diff] [blame] | 1538 | |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 1539 | png_ptr->read_user_chunk_fn = read_user_chunk_fn; |
| 1540 | png_ptr->user_chunk_ptr = user_chunk_ptr; |
| 1541 | } |
| 1542 | #endif |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1543 | |
Glenn Randers-Pehrson | e26c095 | 2009-09-23 11:22:08 -0500 | [diff] [blame] | 1544 | #ifdef PNG_INFO_IMAGE_SUPPORTED |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 1545 | void PNGAPI |
John Bowler | 4f67e40 | 2011-12-28 08:43:37 -0600 | [diff] [blame] | 1546 | png_set_rows(png_const_structrp png_ptr, png_inforp info_ptr, |
| 1547 | png_bytepp row_pointers) |
Glenn Randers-Pehrson | a77ef62 | 2000-02-18 13:48:52 -0600 | [diff] [blame] | 1548 | { |
Glenn Randers-Pehrson | 51650b8 | 2008-08-05 07:44:42 -0500 | [diff] [blame] | 1549 | png_debug1(1, "in %s storage function", "rows"); |
Glenn Randers-Pehrson | fc4a143 | 2000-05-17 17:39:34 -0500 | [diff] [blame] | 1550 | |
Glenn Randers-Pehrson | a77ef62 | 2000-02-18 13:48:52 -0600 | [diff] [blame] | 1551 | if (png_ptr == NULL || info_ptr == NULL) |
| 1552 | return; |
| 1553 | |
Glenn Randers-Pehrson | 5d713fe | 2014-10-31 20:48:55 -0500 | [diff] [blame] | 1554 | if (info_ptr->row_pointers != NULL && |
| 1555 | (info_ptr->row_pointers != row_pointers)) |
Glenn Randers-Pehrson | 4accabb | 2000-04-14 14:20:47 -0500 | [diff] [blame] | 1556 | png_free_data(png_ptr, info_ptr, PNG_FREE_ROWS, 0); |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 1557 | |
Glenn Randers-Pehrson | fc4a143 | 2000-05-17 17:39:34 -0500 | [diff] [blame] | 1558 | info_ptr->row_pointers = row_pointers; |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 1559 | |
Glenn Randers-Pehrson | 0567015 | 2014-03-08 12:39:52 -0600 | [diff] [blame] | 1560 | if (row_pointers != NULL) |
Glenn Randers-Pehrson | fc4a143 | 2000-05-17 17:39:34 -0500 | [diff] [blame] | 1561 | info_ptr->valid |= PNG_INFO_IDAT; |
Glenn Randers-Pehrson | a77ef62 | 2000-02-18 13:48:52 -0600 | [diff] [blame] | 1562 | } |
| 1563 | #endif |
| 1564 | |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 1565 | void PNGAPI |
Cosmin Truta | a74aa9a | 2018-06-17 22:37:44 -0400 | [diff] [blame] | 1566 | png_set_compression_buffer_size(png_structrp png_ptr, size_t size) |
Glenn Randers-Pehrson | 228bd39 | 2000-04-23 23:14:02 -0500 | [diff] [blame] | 1567 | { |
Glenn Randers-Pehrson | 192e92d | 2016-07-13 14:43:42 -0500 | [diff] [blame] | 1568 | if (png_ptr == NULL) |
| 1569 | return; |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 1570 | |
Glenn Randers-Pehrson | 192e92d | 2016-07-13 14:43:42 -0500 | [diff] [blame] | 1571 | if (size == 0 || size > PNG_UINT_31_MAX) |
| 1572 | png_error(png_ptr, "invalid compression buffer size"); |
Glenn Randers-Pehrson | 62333ba | 2010-10-23 08:48:51 -0500 | [diff] [blame] | 1573 | |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 1574 | # ifdef PNG_SEQUENTIAL_READ_SUPPORTED |
Glenn Randers-Pehrson | 192e92d | 2016-07-13 14:43:42 -0500 | [diff] [blame] | 1575 | if ((png_ptr->mode & PNG_IS_READ_STRUCT) != 0) |
| 1576 | { |
| 1577 | png_ptr->IDAT_read_size = (png_uint_32)size; /* checked above */ |
| 1578 | return; |
| 1579 | } |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 1580 | # endif |
Glenn Randers-Pehrson | 62333ba | 2010-10-23 08:48:51 -0500 | [diff] [blame] | 1581 | |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 1582 | # ifdef PNG_WRITE_SUPPORTED |
Glenn Randers-Pehrson | 192e92d | 2016-07-13 14:43:42 -0500 | [diff] [blame] | 1583 | if ((png_ptr->mode & PNG_IS_READ_STRUCT) == 0) |
| 1584 | { |
| 1585 | if (png_ptr->zowner != 0) |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 1586 | { |
Glenn Randers-Pehrson | 192e92d | 2016-07-13 14:43:42 -0500 | [diff] [blame] | 1587 | png_warning(png_ptr, |
Glenn Randers-Pehrson | dd70604 | 2016-07-15 11:20:46 -0500 | [diff] [blame] | 1588 | "Compression buffer size cannot be changed because it is in use"); |
Glenn Randers-Pehrson | bd76965 | 2015-01-27 06:53:56 -0600 | [diff] [blame] | 1589 | |
Glenn Randers-Pehrson | 192e92d | 2016-07-13 14:43:42 -0500 | [diff] [blame] | 1590 | return; |
| 1591 | } |
John Bowler | aa9dea5 | 2012-08-10 19:04:08 -0500 | [diff] [blame] | 1592 | |
Glenn Randers-Pehrson | bd76965 | 2015-01-27 06:53:56 -0600 | [diff] [blame] | 1593 | #ifndef __COVERITY__ |
Glenn Randers-Pehrson | 192e92d | 2016-07-13 14:43:42 -0500 | [diff] [blame] | 1594 | /* Some compilers complain that this is always false. However, it |
| 1595 | * can be true when integer overflow happens. |
| 1596 | */ |
| 1597 | if (size > ZLIB_IO_MAX) |
| 1598 | { |
| 1599 | png_warning(png_ptr, |
Glenn Randers-Pehrson | dd70604 | 2016-07-15 11:20:46 -0500 | [diff] [blame] | 1600 | "Compression buffer size limited to system maximum"); |
Glenn Randers-Pehrson | 192e92d | 2016-07-13 14:43:42 -0500 | [diff] [blame] | 1601 | size = ZLIB_IO_MAX; /* must fit */ |
| 1602 | } |
Glenn Randers-Pehrson | bd76965 | 2015-01-27 06:53:56 -0600 | [diff] [blame] | 1603 | #endif |
John Bowler | aa9dea5 | 2012-08-10 19:04:08 -0500 | [diff] [blame] | 1604 | |
Glenn Randers-Pehrson | 192e92d | 2016-07-13 14:43:42 -0500 | [diff] [blame] | 1605 | if (size < 6) |
| 1606 | { |
| 1607 | /* Deflate will potentially go into an infinite loop on a SYNC_FLUSH |
| 1608 | * if this is permitted. |
| 1609 | */ |
| 1610 | png_warning(png_ptr, |
Glenn Randers-Pehrson | dd70604 | 2016-07-15 11:20:46 -0500 | [diff] [blame] | 1611 | "Compression buffer size cannot be reduced below 6"); |
Glenn Randers-Pehrson | bd76965 | 2015-01-27 06:53:56 -0600 | [diff] [blame] | 1612 | |
Glenn Randers-Pehrson | 192e92d | 2016-07-13 14:43:42 -0500 | [diff] [blame] | 1613 | return; |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 1614 | } |
Glenn Randers-Pehrson | 192e92d | 2016-07-13 14:43:42 -0500 | [diff] [blame] | 1615 | |
| 1616 | if (png_ptr->zbuffer_size != size) |
| 1617 | { |
| 1618 | png_free_buffer_list(png_ptr, &png_ptr->zbuffer_list); |
| 1619 | png_ptr->zbuffer_size = (uInt)size; |
| 1620 | } |
| 1621 | } |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 1622 | # endif |
Glenn Randers-Pehrson | 228bd39 | 2000-04-23 23:14:02 -0500 | [diff] [blame] | 1623 | } |
Glenn Randers-Pehrson | fc4a143 | 2000-05-17 17:39:34 -0500 | [diff] [blame] | 1624 | |
| 1625 | void PNGAPI |
John Bowler | 5d56786 | 2011-12-24 09:12:00 -0600 | [diff] [blame] | 1626 | 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] | 1627 | { |
Glenn Randers-Pehrson | 5d713fe | 2014-10-31 20:48:55 -0500 | [diff] [blame] | 1628 | if (png_ptr != NULL && info_ptr != NULL) |
Glenn Randers-Pehrson | 3875d9a | 2016-10-02 17:08:46 -0500 | [diff] [blame] | 1629 | info_ptr->valid &= (unsigned int)(~mask); |
Glenn Randers-Pehrson | fc4a143 | 2000-05-17 17:39:34 -0500 | [diff] [blame] | 1630 | } |
Glenn Randers-Pehrson | 231e687 | 2001-01-12 15:13:06 -0600 | [diff] [blame] | 1631 | |
Glenn Randers-Pehrson | e68f5a3 | 2001-05-14 09:20:53 -0500 | [diff] [blame] | 1632 | |
Glenn Randers-Pehrson | 272489d | 2004-08-04 06:34:52 -0500 | [diff] [blame] | 1633 | #ifdef PNG_SET_USER_LIMITS_SUPPORTED |
Glenn Randers-Pehrson | 4bb4d01 | 2009-05-20 12:45:29 -0500 | [diff] [blame] | 1634 | /* This function was added to libpng 1.2.6 */ |
Glenn Randers-Pehrson | 272489d | 2004-08-04 06:34:52 -0500 | [diff] [blame] | 1635 | void PNGAPI |
John Bowler | 5d56786 | 2011-12-24 09:12:00 -0600 | [diff] [blame] | 1636 | 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] | 1637 | png_uint_32 user_height_max) |
| 1638 | { |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 1639 | /* Images with dimensions larger than these limits will be |
| 1640 | * rejected by png_set_IHDR(). To accept any PNG datastream |
Glenn Randers-Pehrson | f1cdf4e | 2015-11-12 22:16:56 -0600 | [diff] [blame] | 1641 | * regardless of dimensions, set both limits to 0x7fffffff. |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 1642 | */ |
| 1643 | if (png_ptr == NULL) |
| 1644 | return; |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 1645 | |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 1646 | png_ptr->user_width_max = user_width_max; |
| 1647 | png_ptr->user_height_max = user_height_max; |
Glenn Randers-Pehrson | 272489d | 2004-08-04 06:34:52 -0500 | [diff] [blame] | 1648 | } |
Glenn Randers-Pehrson | e3f3c4e | 2010-02-07 18:08:50 -0600 | [diff] [blame] | 1649 | |
Glenn Randers-Pehrson | 17ca340 | 2009-11-09 06:51:16 -0600 | [diff] [blame] | 1650 | /* This function was added to libpng 1.4.0 */ |
Glenn Randers-Pehrson | 800d1e9 | 2008-08-20 17:25:21 -0500 | [diff] [blame] | 1651 | void PNGAPI |
John Bowler | 4f67e40 | 2011-12-28 08:43:37 -0600 | [diff] [blame] | 1652 | 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] | 1653 | { |
Glenn Randers-Pehrson | bd76965 | 2015-01-27 06:53:56 -0600 | [diff] [blame] | 1654 | if (png_ptr != NULL) |
| 1655 | png_ptr->user_chunk_cache_max = user_chunk_cache_max; |
Glenn Randers-Pehrson | e3f3c4e | 2010-02-07 18:08:50 -0600 | [diff] [blame] | 1656 | } |
| 1657 | |
| 1658 | /* This function was added to libpng 1.4.1 */ |
| 1659 | void PNGAPI |
John Bowler | 5d56786 | 2011-12-24 09:12:00 -0600 | [diff] [blame] | 1660 | png_set_chunk_malloc_max (png_structrp png_ptr, |
Glenn Randers-Pehrson | 62333ba | 2010-10-23 08:48:51 -0500 | [diff] [blame] | 1661 | png_alloc_size_t user_chunk_malloc_max) |
Glenn Randers-Pehrson | e3f3c4e | 2010-02-07 18:08:50 -0600 | [diff] [blame] | 1662 | { |
Glenn Randers-Pehrson | 0567015 | 2014-03-08 12:39:52 -0600 | [diff] [blame] | 1663 | if (png_ptr != NULL) |
Glenn Randers-Pehrson | 62333ba | 2010-10-23 08:48:51 -0500 | [diff] [blame] | 1664 | png_ptr->user_chunk_malloc_max = user_chunk_malloc_max; |
Glenn Randers-Pehrson | 800d1e9 | 2008-08-20 17:25:21 -0500 | [diff] [blame] | 1665 | } |
Glenn Randers-Pehrson | cda68df | 2014-11-06 22:11:39 -0600 | [diff] [blame] | 1666 | #endif /* ?SET_USER_LIMITS */ |
Glenn Randers-Pehrson | 272489d | 2004-08-04 06:34:52 -0500 | [diff] [blame] | 1667 | |
Glenn Randers-Pehrson | 6bc53be | 2006-06-16 07:52:03 -0500 | [diff] [blame] | 1668 | |
Glenn Randers-Pehrson | e26c095 | 2009-09-23 11:22:08 -0500 | [diff] [blame] | 1669 | #ifdef PNG_BENIGN_ERRORS_SUPPORTED |
Glenn Randers-Pehrson | 6bc53be | 2006-06-16 07:52:03 -0500 | [diff] [blame] | 1670 | void PNGAPI |
John Bowler | 5d56786 | 2011-12-24 09:12:00 -0600 | [diff] [blame] | 1671 | png_set_benign_errors(png_structrp png_ptr, int allowed) |
Glenn Randers-Pehrson | 6bc53be | 2006-06-16 07:52:03 -0500 | [diff] [blame] | 1672 | { |
Glenn Randers-Pehrson | 51650b8 | 2008-08-05 07:44:42 -0500 | [diff] [blame] | 1673 | png_debug(1, "in png_set_benign_errors"); |
Glenn Randers-Pehrson | da00980 | 2009-08-15 13:25:47 -0500 | [diff] [blame] | 1674 | |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 1675 | /* If allowed is 1, png_benign_error() is treated as a warning. |
| 1676 | * |
| 1677 | * If allowed is 0, png_benign_error() is treated as an error (which |
| 1678 | * is the default behavior if png_set_benign_errors() is not called). |
| 1679 | */ |
| 1680 | |
Glenn Randers-Pehrson | 0567015 | 2014-03-08 12:39:52 -0600 | [diff] [blame] | 1681 | if (allowed != 0) |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 1682 | png_ptr->flags |= PNG_FLAG_BENIGN_ERRORS_WARN | |
| 1683 | PNG_FLAG_APP_WARNINGS_WARN | PNG_FLAG_APP_ERRORS_WARN; |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 1684 | |
Glenn Randers-Pehrson | 6bc53be | 2006-06-16 07:52:03 -0500 | [diff] [blame] | 1685 | else |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 1686 | png_ptr->flags &= ~(PNG_FLAG_BENIGN_ERRORS_WARN | |
| 1687 | PNG_FLAG_APP_WARNINGS_WARN | PNG_FLAG_APP_ERRORS_WARN); |
Glenn Randers-Pehrson | 6bc53be | 2006-06-16 07:52:03 -0500 | [diff] [blame] | 1688 | } |
Glenn Randers-Pehrson | cda68df | 2014-11-06 22:11:39 -0600 | [diff] [blame] | 1689 | #endif /* BENIGN_ERRORS */ |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 1690 | |
| 1691 | #ifdef PNG_CHECK_FOR_INVALID_INDEX_SUPPORTED |
| 1692 | /* Whether to report invalid palette index; added at libng-1.5.10. |
| 1693 | * It is possible for an indexed (color-type==3) PNG file to contain |
| 1694 | * pixels with invalid (out-of-range) indexes if the PLTE chunk has |
| 1695 | * fewer entries than the image's bit-depth would allow. We recover |
Glenn Randers-Pehrson | 6cae24c | 2014-10-13 11:11:21 -0500 | [diff] [blame] | 1696 | * from this gracefully by filling any incomplete palette with zeros |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 1697 | * (opaque black). By default, when this occurs libpng will issue |
| 1698 | * a benign error. This API can be used to override that behavior. |
| 1699 | */ |
| 1700 | void PNGAPI |
| 1701 | png_set_check_for_invalid_index(png_structrp png_ptr, int allowed) |
| 1702 | { |
| 1703 | png_debug(1, "in png_set_check_for_invalid_index"); |
| 1704 | |
| 1705 | if (allowed > 0) |
| 1706 | png_ptr->num_palette_max = 0; |
| 1707 | |
| 1708 | else |
| 1709 | png_ptr->num_palette_max = -1; |
| 1710 | } |
| 1711 | #endif |
Glenn Randers-Pehrson | 975cbbb | 2015-12-13 15:04:18 -0600 | [diff] [blame] | 1712 | |
| 1713 | #if defined(PNG_TEXT_SUPPORTED) || defined(PNG_pCAL_SUPPORTED) || \ |
| 1714 | defined(PNG_iCCP_SUPPORTED) || defined(PNG_sPLT_SUPPORTED) |
| 1715 | /* Check that the tEXt or zTXt keyword is valid per PNG 1.0 specification, |
| 1716 | * and if invalid, correct the keyword rather than discarding the entire |
| 1717 | * chunk. The PNG 1.0 specification requires keywords 1-79 characters in |
| 1718 | * length, forbids leading or trailing whitespace, multiple internal spaces, |
| 1719 | * and the non-break space (0x80) from ISO 8859-1. Returns keyword length. |
| 1720 | * |
| 1721 | * The 'new_key' buffer must be 80 characters in size (for the keyword plus a |
| 1722 | * trailing '\0'). If this routine returns 0 then there was no keyword, or a |
| 1723 | * valid one could not be generated, and the caller must png_error. |
| 1724 | */ |
| 1725 | png_uint_32 /* PRIVATE */ |
| 1726 | png_check_keyword(png_structrp png_ptr, png_const_charp key, png_bytep new_key) |
| 1727 | { |
John Bowler | 0ac91cc | 2016-06-28 19:18:09 -0700 | [diff] [blame] | 1728 | #ifdef PNG_WARNINGS_SUPPORTED |
Glenn Randers-Pehrson | 975cbbb | 2015-12-13 15:04:18 -0600 | [diff] [blame] | 1729 | png_const_charp orig_key = key; |
John Bowler | 0ac91cc | 2016-06-28 19:18:09 -0700 | [diff] [blame] | 1730 | #endif |
Glenn Randers-Pehrson | 975cbbb | 2015-12-13 15:04:18 -0600 | [diff] [blame] | 1731 | png_uint_32 key_len = 0; |
| 1732 | int bad_character = 0; |
| 1733 | int space = 1; |
| 1734 | |
| 1735 | png_debug(1, "in png_check_keyword"); |
| 1736 | |
| 1737 | if (key == NULL) |
| 1738 | { |
| 1739 | *new_key = 0; |
| 1740 | return 0; |
| 1741 | } |
| 1742 | |
| 1743 | while (*key && key_len < 79) |
| 1744 | { |
| 1745 | png_byte ch = (png_byte)*key++; |
| 1746 | |
| 1747 | if ((ch > 32 && ch <= 126) || (ch >= 161 /*&& ch <= 255*/)) |
Viktor Szakats | 8c50acb | 2017-03-29 23:54:40 +0000 | [diff] [blame] | 1748 | { |
| 1749 | *new_key++ = ch; ++key_len; space = 0; |
| 1750 | } |
Glenn Randers-Pehrson | 975cbbb | 2015-12-13 15:04:18 -0600 | [diff] [blame] | 1751 | |
| 1752 | else if (space == 0) |
| 1753 | { |
| 1754 | /* A space or an invalid character when one wasn't seen immediately |
| 1755 | * before; output just a space. |
| 1756 | */ |
Viktor Szakats | 8c50acb | 2017-03-29 23:54:40 +0000 | [diff] [blame] | 1757 | *new_key++ = 32; ++key_len; space = 1; |
Glenn Randers-Pehrson | 975cbbb | 2015-12-13 15:04:18 -0600 | [diff] [blame] | 1758 | |
| 1759 | /* If the character was not a space then it is invalid. */ |
| 1760 | if (ch != 32) |
| 1761 | bad_character = ch; |
| 1762 | } |
| 1763 | |
| 1764 | else if (bad_character == 0) |
| 1765 | bad_character = ch; /* just skip it, record the first error */ |
| 1766 | } |
| 1767 | |
| 1768 | if (key_len > 0 && space != 0) /* trailing space */ |
| 1769 | { |
Viktor Szakats | 8c50acb | 2017-03-29 23:54:40 +0000 | [diff] [blame] | 1770 | --key_len; --new_key; |
Glenn Randers-Pehrson | 975cbbb | 2015-12-13 15:04:18 -0600 | [diff] [blame] | 1771 | if (bad_character == 0) |
| 1772 | bad_character = 32; |
| 1773 | } |
| 1774 | |
| 1775 | /* Terminate the keyword */ |
| 1776 | *new_key = 0; |
| 1777 | |
| 1778 | if (key_len == 0) |
| 1779 | return 0; |
| 1780 | |
| 1781 | #ifdef PNG_WARNINGS_SUPPORTED |
| 1782 | /* Try to only output one warning per keyword: */ |
| 1783 | if (*key != 0) /* keyword too long */ |
| 1784 | png_warning(png_ptr, "keyword truncated"); |
| 1785 | |
| 1786 | else if (bad_character != 0) |
| 1787 | { |
| 1788 | PNG_WARNING_PARAMETERS(p) |
| 1789 | |
| 1790 | png_warning_parameter(p, 1, orig_key); |
| 1791 | png_warning_parameter_signed(p, 2, PNG_NUMBER_FORMAT_02x, bad_character); |
| 1792 | |
| 1793 | png_formatted_warning(png_ptr, p, "keyword \"@1\": bad character '0x@2'"); |
| 1794 | } |
John Bowler | 0ac91cc | 2016-06-28 19:18:09 -0700 | [diff] [blame] | 1795 | #else /* !WARNINGS */ |
| 1796 | PNG_UNUSED(png_ptr) |
| 1797 | #endif /* !WARNINGS */ |
Glenn Randers-Pehrson | 975cbbb | 2015-12-13 15:04:18 -0600 | [diff] [blame] | 1798 | |
| 1799 | return key_len; |
| 1800 | } |
| 1801 | #endif /* TEXT || pCAL || iCCP || sPLT */ |
Glenn Randers-Pehrson | cda68df | 2014-11-06 22:11:39 -0600 | [diff] [blame] | 1802 | #endif /* READ || WRITE */ |