The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1 | |
| 2 | /* pngset.c - storage of image information into info struct |
| 3 | * |
Matt Sarett | 96be908 | 2016-05-03 13:29:54 -0400 | [diff] [blame] | 4 | * Last changed in libpng 1.6.19 [November 12, 2015] |
| 5 | * Copyright (c) 1998-2015 Glenn Randers-Pehrson |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 6 | * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) |
| 7 | * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) |
| 8 | * |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame] | 9 | * This code is released under the libpng license. |
| 10 | * For conditions of distribution and use, see the disclaimer |
| 11 | * and license in png.h |
| 12 | * |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [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 | */ |
| 18 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 19 | #include "pngpriv.h" |
| 20 | |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 21 | #if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) |
| 22 | |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 23 | #ifdef PNG_bKGD_SUPPORTED |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 24 | void PNGAPI |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 25 | png_set_bKGD(png_const_structrp png_ptr, png_inforp info_ptr, |
| 26 | png_const_color_16p background) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 27 | { |
The Android Open Source Project | 4215dd1 | 2009-03-09 11:52:12 -0700 | [diff] [blame] | 28 | png_debug1(1, "in %s storage function", "bKGD"); |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 29 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 30 | if (png_ptr == NULL || info_ptr == NULL || background == NULL) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 31 | return; |
| 32 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 33 | info_ptr->background = *background; |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 34 | info_ptr->valid |= PNG_INFO_bKGD; |
| 35 | } |
| 36 | #endif |
| 37 | |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 38 | #ifdef PNG_cHRM_SUPPORTED |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 39 | void PNGFAPI |
| 40 | png_set_cHRM_fixed(png_const_structrp png_ptr, png_inforp info_ptr, |
| 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) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 44 | { |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 45 | png_xy xy; |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 46 | |
The Android Open Source Project | 4215dd1 | 2009-03-09 11:52:12 -0700 | [diff] [blame] | 47 | png_debug1(1, "in %s storage function", "cHRM fixed"); |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 48 | |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 49 | if (png_ptr == NULL || info_ptr == NULL) |
| 50 | return; |
| 51 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [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, |
Matt Sarett | 96be908 | 2016-05-03 13:29:54 -0400 | [diff] [blame] | 62 | 2/* override with app values*/) != 0) |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 63 | info_ptr->colorspace.flags |= PNG_COLORSPACE_FROM_cHRM; |
| 64 | |
| 65 | png_colorspace_sync_info(png_ptr, info_ptr); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 66 | } |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 67 | |
| 68 | void PNGFAPI |
| 69 | png_set_cHRM_XYZ_fixed(png_const_structrp png_ptr, png_inforp info_ptr, |
| 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; |
| 77 | |
| 78 | png_debug1(1, "in %s storage function", "cHRM XYZ fixed"); |
| 79 | |
| 80 | if (png_ptr == NULL || info_ptr == NULL) |
| 81 | return; |
| 82 | |
| 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; |
| 92 | |
Matt Sarett | 96be908 | 2016-05-03 13:29:54 -0400 | [diff] [blame] | 93 | if (png_colorspace_set_endpoints(png_ptr, &info_ptr->colorspace, |
| 94 | &XYZ, 2) != 0) |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 95 | info_ptr->colorspace.flags |= PNG_COLORSPACE_FROM_cHRM; |
| 96 | |
| 97 | png_colorspace_sync_info(png_ptr, info_ptr); |
| 98 | } |
| 99 | |
| 100 | # ifdef PNG_FLOATING_POINT_SUPPORTED |
| 101 | void PNGAPI |
| 102 | png_set_cHRM(png_const_structrp png_ptr, png_inforp info_ptr, |
| 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, |
| 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")); |
| 115 | } |
| 116 | |
| 117 | void PNGAPI |
| 118 | png_set_cHRM_XYZ(png_const_structrp png_ptr, png_inforp info_ptr, double red_X, |
| 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, |
| 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"), |
Matt Sarett | 96be908 | 2016-05-03 13:29:54 -0400 | [diff] [blame] | 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")); |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 132 | } |
Matt Sarett | 96be908 | 2016-05-03 13:29:54 -0400 | [diff] [blame] | 133 | # endif /* FLOATING_POINT */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 134 | |
Matt Sarett | 96be908 | 2016-05-03 13:29:54 -0400 | [diff] [blame] | 135 | #endif /* cHRM */ |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 136 | |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 137 | #ifdef PNG_gAMA_SUPPORTED |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 138 | void PNGFAPI |
| 139 | png_set_gAMA_fixed(png_const_structrp png_ptr, png_inforp info_ptr, |
| 140 | png_fixed_point file_gamma) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 141 | { |
The Android Open Source Project | 4215dd1 | 2009-03-09 11:52:12 -0700 | [diff] [blame] | 142 | png_debug1(1, "in %s storage function", "gAMA"); |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 143 | |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 144 | if (png_ptr == NULL || info_ptr == NULL) |
| 145 | return; |
| 146 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 147 | png_colorspace_set_gamma(png_ptr, &info_ptr->colorspace, file_gamma); |
| 148 | png_colorspace_sync_info(png_ptr, info_ptr); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 149 | } |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 150 | |
| 151 | # ifdef PNG_FLOATING_POINT_SUPPORTED |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 152 | void PNGAPI |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 153 | png_set_gAMA(png_const_structrp png_ptr, png_inforp info_ptr, double file_gamma) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 154 | { |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 155 | png_set_gAMA_fixed(png_ptr, info_ptr, png_fixed(png_ptr, file_gamma, |
| 156 | "png_set_gAMA")); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 157 | } |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 158 | # endif |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 159 | #endif |
| 160 | |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 161 | #ifdef PNG_hIST_SUPPORTED |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 162 | void PNGAPI |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 163 | png_set_hIST(png_const_structrp png_ptr, png_inforp info_ptr, |
| 164 | png_const_uint_16p hist) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 165 | { |
| 166 | int i; |
| 167 | |
The Android Open Source Project | 4215dd1 | 2009-03-09 11:52:12 -0700 | [diff] [blame] | 168 | png_debug1(1, "in %s storage function", "hIST"); |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 169 | |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 170 | if (png_ptr == NULL || info_ptr == NULL) |
| 171 | return; |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 172 | |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 173 | if (info_ptr->num_palette == 0 || info_ptr->num_palette |
| 174 | > PNG_MAX_PALETTE_LENGTH) |
| 175 | { |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame] | 176 | png_warning(png_ptr, |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 177 | "Invalid palette size, hIST allocation skipped"); |
| 178 | |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame] | 179 | return; |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 180 | } |
| 181 | |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 182 | png_free_data(png_ptr, info_ptr, PNG_FREE_HIST, 0); |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 183 | |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame] | 184 | /* Changed from info->num_palette to PNG_MAX_PALETTE_LENGTH in |
| 185 | * version 1.2.1 |
| 186 | */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 187 | info_ptr->hist = png_voidcast(png_uint_16p, png_malloc_warn(png_ptr, |
| 188 | PNG_MAX_PALETTE_LENGTH * (sizeof (png_uint_16)))); |
| 189 | |
| 190 | if (info_ptr->hist == NULL) |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame] | 191 | { |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 192 | png_warning(png_ptr, "Insufficient memory for hIST chunk data"); |
Matt Sarett | 96be908 | 2016-05-03 13:29:54 -0400 | [diff] [blame] | 193 | |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame] | 194 | return; |
| 195 | } |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 196 | |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 197 | info_ptr->free_me |= PNG_FREE_HIST; |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 198 | |
| 199 | for (i = 0; i < info_ptr->num_palette; i++) |
| 200 | info_ptr->hist[i] = hist[i]; |
| 201 | |
| 202 | info_ptr->valid |= PNG_INFO_hIST; |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 203 | } |
| 204 | #endif |
| 205 | |
| 206 | void PNGAPI |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 207 | png_set_IHDR(png_const_structrp png_ptr, png_inforp info_ptr, |
| 208 | png_uint_32 width, png_uint_32 height, int bit_depth, |
| 209 | int color_type, int interlace_type, int compression_type, |
| 210 | int filter_type) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 211 | { |
The Android Open Source Project | 4215dd1 | 2009-03-09 11:52:12 -0700 | [diff] [blame] | 212 | png_debug1(1, "in %s storage function", "IHDR"); |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 213 | |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 214 | if (png_ptr == NULL || info_ptr == NULL) |
| 215 | return; |
| 216 | |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 217 | info_ptr->width = width; |
| 218 | info_ptr->height = height; |
| 219 | info_ptr->bit_depth = (png_byte)bit_depth; |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 220 | info_ptr->color_type = (png_byte)color_type; |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 221 | info_ptr->compression_type = (png_byte)compression_type; |
| 222 | info_ptr->filter_type = (png_byte)filter_type; |
| 223 | info_ptr->interlace_type = (png_byte)interlace_type; |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 224 | |
| 225 | png_check_IHDR (png_ptr, info_ptr->width, info_ptr->height, |
| 226 | info_ptr->bit_depth, info_ptr->color_type, info_ptr->interlace_type, |
| 227 | info_ptr->compression_type, info_ptr->filter_type); |
| 228 | |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 229 | if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE) |
| 230 | info_ptr->channels = 1; |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 231 | |
Matt Sarett | 96be908 | 2016-05-03 13:29:54 -0400 | [diff] [blame] | 232 | else if ((info_ptr->color_type & PNG_COLOR_MASK_COLOR) != 0) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 233 | info_ptr->channels = 3; |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 234 | |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 235 | else |
| 236 | info_ptr->channels = 1; |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 237 | |
Matt Sarett | 96be908 | 2016-05-03 13:29:54 -0400 | [diff] [blame] | 238 | if ((info_ptr->color_type & PNG_COLOR_MASK_ALPHA) != 0) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 239 | info_ptr->channels++; |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 240 | |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 241 | info_ptr->pixel_depth = (png_byte)(info_ptr->channels * info_ptr->bit_depth); |
| 242 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 243 | info_ptr->rowbytes = PNG_ROWBYTES(info_ptr->pixel_depth, width); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 244 | } |
| 245 | |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 246 | #ifdef PNG_oFFs_SUPPORTED |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 247 | void PNGAPI |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 248 | png_set_oFFs(png_const_structrp png_ptr, png_inforp info_ptr, |
| 249 | png_int_32 offset_x, png_int_32 offset_y, int unit_type) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 250 | { |
The Android Open Source Project | 4215dd1 | 2009-03-09 11:52:12 -0700 | [diff] [blame] | 251 | png_debug1(1, "in %s storage function", "oFFs"); |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 252 | |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 253 | if (png_ptr == NULL || info_ptr == NULL) |
| 254 | return; |
| 255 | |
| 256 | info_ptr->x_offset = offset_x; |
| 257 | info_ptr->y_offset = offset_y; |
| 258 | info_ptr->offset_unit_type = (png_byte)unit_type; |
| 259 | info_ptr->valid |= PNG_INFO_oFFs; |
| 260 | } |
| 261 | #endif |
| 262 | |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 263 | #ifdef PNG_pCAL_SUPPORTED |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 264 | void PNGAPI |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 265 | png_set_pCAL(png_const_structrp png_ptr, png_inforp info_ptr, |
| 266 | png_const_charp purpose, png_int_32 X0, png_int_32 X1, int type, |
| 267 | int nparams, png_const_charp units, png_charpp params) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 268 | { |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 269 | png_size_t length; |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 270 | int i; |
| 271 | |
The Android Open Source Project | 4215dd1 | 2009-03-09 11:52:12 -0700 | [diff] [blame] | 272 | png_debug1(1, "in %s storage function", "pCAL"); |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 273 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 274 | if (png_ptr == NULL || info_ptr == NULL || purpose == NULL || units == NULL |
Matt Sarett | 96be908 | 2016-05-03 13:29:54 -0400 | [diff] [blame] | 275 | || (nparams > 0 && params == NULL)) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 276 | return; |
| 277 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 278 | length = strlen(purpose) + 1; |
The Android Open Source Project | 4215dd1 | 2009-03-09 11:52:12 -0700 | [diff] [blame] | 279 | png_debug1(3, "allocating purpose for info (%lu bytes)", |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 280 | (unsigned long)length); |
| 281 | |
| 282 | /* TODO: validate format of calibration name and unit name */ |
| 283 | |
| 284 | /* Check that the type matches the specification. */ |
| 285 | if (type < 0 || type > 3) |
| 286 | png_error(png_ptr, "Invalid pCAL equation type"); |
| 287 | |
| 288 | if (nparams < 0 || nparams > 255) |
| 289 | png_error(png_ptr, "Invalid pCAL parameter count"); |
| 290 | |
| 291 | /* Validate params[nparams] */ |
| 292 | for (i=0; i<nparams; ++i) |
Matt Sarett | 96be908 | 2016-05-03 13:29:54 -0400 | [diff] [blame] | 293 | { |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 294 | if (params[i] == NULL || |
Matt Sarett | 96be908 | 2016-05-03 13:29:54 -0400 | [diff] [blame] | 295 | !png_check_fp_string(params[i], strlen(params[i]))) |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 296 | png_error(png_ptr, "Invalid format for pCAL parameter"); |
Matt Sarett | 96be908 | 2016-05-03 13:29:54 -0400 | [diff] [blame] | 297 | } |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 298 | |
| 299 | info_ptr->pcal_purpose = png_voidcast(png_charp, |
Matt Sarett | 96be908 | 2016-05-03 13:29:54 -0400 | [diff] [blame] | 300 | png_malloc_warn(png_ptr, length)); |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 301 | |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 302 | if (info_ptr->pcal_purpose == NULL) |
The Android Open Source Project | 4215dd1 | 2009-03-09 11:52:12 -0700 | [diff] [blame] | 303 | { |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 304 | png_warning(png_ptr, "Insufficient memory for pCAL purpose"); |
Matt Sarett | 96be908 | 2016-05-03 13:29:54 -0400 | [diff] [blame] | 305 | |
The Android Open Source Project | 4215dd1 | 2009-03-09 11:52:12 -0700 | [diff] [blame] | 306 | return; |
| 307 | } |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 308 | |
| 309 | memcpy(info_ptr->pcal_purpose, purpose, length); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 310 | |
The Android Open Source Project | 4215dd1 | 2009-03-09 11:52:12 -0700 | [diff] [blame] | 311 | png_debug(3, "storing X0, X1, type, and nparams in info"); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 312 | info_ptr->pcal_X0 = X0; |
| 313 | info_ptr->pcal_X1 = X1; |
| 314 | info_ptr->pcal_type = (png_byte)type; |
| 315 | info_ptr->pcal_nparams = (png_byte)nparams; |
| 316 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 317 | length = strlen(units) + 1; |
The Android Open Source Project | 4215dd1 | 2009-03-09 11:52:12 -0700 | [diff] [blame] | 318 | png_debug1(3, "allocating units for info (%lu bytes)", |
| 319 | (unsigned long)length); |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 320 | |
| 321 | info_ptr->pcal_units = png_voidcast(png_charp, |
| 322 | png_malloc_warn(png_ptr, length)); |
| 323 | |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 324 | if (info_ptr->pcal_units == NULL) |
The Android Open Source Project | 4215dd1 | 2009-03-09 11:52:12 -0700 | [diff] [blame] | 325 | { |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 326 | png_warning(png_ptr, "Insufficient memory for pCAL units"); |
Matt Sarett | 96be908 | 2016-05-03 13:29:54 -0400 | [diff] [blame] | 327 | |
The Android Open Source Project | 4215dd1 | 2009-03-09 11:52:12 -0700 | [diff] [blame] | 328 | return; |
| 329 | } |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 330 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 331 | memcpy(info_ptr->pcal_units, units, length); |
| 332 | |
| 333 | info_ptr->pcal_params = png_voidcast(png_charpp, png_malloc_warn(png_ptr, |
| 334 | (png_size_t)((nparams + 1) * (sizeof (png_charp))))); |
| 335 | |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 336 | if (info_ptr->pcal_params == NULL) |
The Android Open Source Project | 4215dd1 | 2009-03-09 11:52:12 -0700 | [diff] [blame] | 337 | { |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 338 | png_warning(png_ptr, "Insufficient memory for pCAL params"); |
Matt Sarett | 96be908 | 2016-05-03 13:29:54 -0400 | [diff] [blame] | 339 | |
The Android Open Source Project | 4215dd1 | 2009-03-09 11:52:12 -0700 | [diff] [blame] | 340 | return; |
| 341 | } |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 342 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 343 | memset(info_ptr->pcal_params, 0, (nparams + 1) * (sizeof (png_charp))); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 344 | |
| 345 | for (i = 0; i < nparams; i++) |
| 346 | { |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 347 | length = strlen(params[i]) + 1; |
The Android Open Source Project | 4215dd1 | 2009-03-09 11:52:12 -0700 | [diff] [blame] | 348 | png_debug2(3, "allocating parameter %d for info (%lu bytes)", i, |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 349 | (unsigned long)length); |
| 350 | |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 351 | info_ptr->pcal_params[i] = (png_charp)png_malloc_warn(png_ptr, length); |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 352 | |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 353 | if (info_ptr->pcal_params[i] == NULL) |
The Android Open Source Project | 4215dd1 | 2009-03-09 11:52:12 -0700 | [diff] [blame] | 354 | { |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 355 | png_warning(png_ptr, "Insufficient memory for pCAL parameter"); |
Matt Sarett | 96be908 | 2016-05-03 13:29:54 -0400 | [diff] [blame] | 356 | |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame] | 357 | return; |
The Android Open Source Project | 4215dd1 | 2009-03-09 11:52:12 -0700 | [diff] [blame] | 358 | } |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 359 | |
| 360 | memcpy(info_ptr->pcal_params[i], params[i], length); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 361 | } |
| 362 | |
| 363 | info_ptr->valid |= PNG_INFO_pCAL; |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame] | 364 | info_ptr->free_me |= PNG_FREE_PCAL; |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 365 | } |
| 366 | #endif |
| 367 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 368 | #ifdef PNG_sCAL_SUPPORTED |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 369 | void PNGAPI |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 370 | png_set_sCAL_s(png_const_structrp png_ptr, png_inforp info_ptr, |
| 371 | int unit, png_const_charp swidth, png_const_charp sheight) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 372 | { |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 373 | png_size_t lengthw = 0, lengthh = 0; |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 374 | |
The Android Open Source Project | 4215dd1 | 2009-03-09 11:52:12 -0700 | [diff] [blame] | 375 | png_debug1(1, "in %s storage function", "sCAL"); |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 376 | |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 377 | if (png_ptr == NULL || info_ptr == NULL) |
| 378 | return; |
| 379 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 380 | /* Double check the unit (should never get here with an invalid |
| 381 | * unit unless this is an API call.) |
| 382 | */ |
| 383 | if (unit != 1 && unit != 2) |
| 384 | png_error(png_ptr, "Invalid sCAL unit"); |
| 385 | |
| 386 | if (swidth == NULL || (lengthw = strlen(swidth)) == 0 || |
| 387 | swidth[0] == 45 /* '-' */ || !png_check_fp_string(swidth, lengthw)) |
| 388 | png_error(png_ptr, "Invalid sCAL width"); |
| 389 | |
| 390 | if (sheight == NULL || (lengthh = strlen(sheight)) == 0 || |
| 391 | sheight[0] == 45 /* '-' */ || !png_check_fp_string(sheight, lengthh)) |
| 392 | png_error(png_ptr, "Invalid sCAL height"); |
| 393 | |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 394 | info_ptr->scal_unit = (png_byte)unit; |
| 395 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 396 | ++lengthw; |
| 397 | |
| 398 | png_debug1(3, "allocating unit for info (%u bytes)", (unsigned int)lengthw); |
| 399 | |
| 400 | info_ptr->scal_s_width = png_voidcast(png_charp, |
| 401 | png_malloc_warn(png_ptr, lengthw)); |
| 402 | |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 403 | if (info_ptr->scal_s_width == NULL) |
| 404 | { |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 405 | png_warning(png_ptr, "Memory allocation failed while processing sCAL"); |
Matt Sarett | 96be908 | 2016-05-03 13:29:54 -0400 | [diff] [blame] | 406 | |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 407 | return; |
| 408 | } |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 409 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 410 | memcpy(info_ptr->scal_s_width, swidth, lengthw); |
| 411 | |
| 412 | ++lengthh; |
| 413 | |
| 414 | png_debug1(3, "allocating unit for info (%u bytes)", (unsigned int)lengthh); |
| 415 | |
| 416 | info_ptr->scal_s_height = png_voidcast(png_charp, |
| 417 | png_malloc_warn(png_ptr, lengthh)); |
| 418 | |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 419 | if (info_ptr->scal_s_height == NULL) |
| 420 | { |
| 421 | png_free (png_ptr, info_ptr->scal_s_width); |
The Android Open Source Project | 4215dd1 | 2009-03-09 11:52:12 -0700 | [diff] [blame] | 422 | info_ptr->scal_s_width = NULL; |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 423 | |
| 424 | png_warning(png_ptr, "Memory allocation failed while processing sCAL"); |
Matt Sarett | 96be908 | 2016-05-03 13:29:54 -0400 | [diff] [blame] | 425 | |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 426 | return; |
| 427 | } |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 428 | |
| 429 | memcpy(info_ptr->scal_s_height, sheight, lengthh); |
| 430 | |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 431 | info_ptr->valid |= PNG_INFO_sCAL; |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 432 | info_ptr->free_me |= PNG_FREE_SCAL; |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 433 | } |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 434 | |
| 435 | # ifdef PNG_FLOATING_POINT_SUPPORTED |
| 436 | void PNGAPI |
| 437 | png_set_sCAL(png_const_structrp png_ptr, png_inforp info_ptr, int unit, |
| 438 | double width, double height) |
| 439 | { |
| 440 | png_debug1(1, "in %s storage function", "sCAL"); |
| 441 | |
| 442 | /* Check the arguments. */ |
| 443 | if (width <= 0) |
| 444 | png_warning(png_ptr, "Invalid sCAL width ignored"); |
| 445 | |
| 446 | else if (height <= 0) |
| 447 | png_warning(png_ptr, "Invalid sCAL height ignored"); |
| 448 | |
| 449 | else |
| 450 | { |
| 451 | /* Convert 'width' and 'height' to ASCII. */ |
| 452 | char swidth[PNG_sCAL_MAX_DIGITS+1]; |
| 453 | char sheight[PNG_sCAL_MAX_DIGITS+1]; |
| 454 | |
| 455 | png_ascii_from_fp(png_ptr, swidth, (sizeof swidth), width, |
| 456 | PNG_sCAL_PRECISION); |
| 457 | png_ascii_from_fp(png_ptr, sheight, (sizeof sheight), height, |
| 458 | PNG_sCAL_PRECISION); |
| 459 | |
| 460 | png_set_sCAL_s(png_ptr, info_ptr, unit, swidth, sheight); |
| 461 | } |
| 462 | } |
| 463 | # endif |
| 464 | |
| 465 | # ifdef PNG_FIXED_POINT_SUPPORTED |
| 466 | void PNGAPI |
| 467 | png_set_sCAL_fixed(png_const_structrp png_ptr, png_inforp info_ptr, int unit, |
| 468 | png_fixed_point width, png_fixed_point height) |
| 469 | { |
| 470 | png_debug1(1, "in %s storage function", "sCAL"); |
| 471 | |
| 472 | /* Check the arguments. */ |
| 473 | if (width <= 0) |
| 474 | png_warning(png_ptr, "Invalid sCAL width ignored"); |
| 475 | |
| 476 | else if (height <= 0) |
| 477 | png_warning(png_ptr, "Invalid sCAL height ignored"); |
| 478 | |
| 479 | else |
| 480 | { |
| 481 | /* Convert 'width' and 'height' to ASCII. */ |
| 482 | char swidth[PNG_sCAL_MAX_DIGITS+1]; |
| 483 | char sheight[PNG_sCAL_MAX_DIGITS+1]; |
| 484 | |
| 485 | png_ascii_from_fixed(png_ptr, swidth, (sizeof swidth), width); |
| 486 | png_ascii_from_fixed(png_ptr, sheight, (sizeof sheight), height); |
| 487 | |
| 488 | png_set_sCAL_s(png_ptr, info_ptr, unit, swidth, sheight); |
| 489 | } |
| 490 | } |
| 491 | # endif |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 492 | #endif |
| 493 | |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 494 | #ifdef PNG_pHYs_SUPPORTED |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 495 | void PNGAPI |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 496 | png_set_pHYs(png_const_structrp png_ptr, png_inforp info_ptr, |
| 497 | png_uint_32 res_x, png_uint_32 res_y, int unit_type) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 498 | { |
The Android Open Source Project | 4215dd1 | 2009-03-09 11:52:12 -0700 | [diff] [blame] | 499 | png_debug1(1, "in %s storage function", "pHYs"); |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 500 | |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 501 | if (png_ptr == NULL || info_ptr == NULL) |
| 502 | return; |
| 503 | |
| 504 | info_ptr->x_pixels_per_unit = res_x; |
| 505 | info_ptr->y_pixels_per_unit = res_y; |
| 506 | info_ptr->phys_unit_type = (png_byte)unit_type; |
| 507 | info_ptr->valid |= PNG_INFO_pHYs; |
| 508 | } |
| 509 | #endif |
| 510 | |
| 511 | void PNGAPI |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 512 | png_set_PLTE(png_structrp png_ptr, png_inforp info_ptr, |
| 513 | png_const_colorp palette, int num_palette) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 514 | { |
| 515 | |
Matt Sarett | 96be908 | 2016-05-03 13:29:54 -0400 | [diff] [blame] | 516 | png_uint_32 max_palette_length; |
| 517 | |
The Android Open Source Project | 4215dd1 | 2009-03-09 11:52:12 -0700 | [diff] [blame] | 518 | png_debug1(1, "in %s storage function", "PLTE"); |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 519 | |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 520 | if (png_ptr == NULL || info_ptr == NULL) |
| 521 | return; |
| 522 | |
Matt Sarett | 96be908 | 2016-05-03 13:29:54 -0400 | [diff] [blame] | 523 | max_palette_length = (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE) ? |
| 524 | (1 << info_ptr->bit_depth) : PNG_MAX_PALETTE_LENGTH; |
| 525 | |
| 526 | if (num_palette < 0 || num_palette > (int) max_palette_length) |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame] | 527 | { |
| 528 | if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 529 | png_error(png_ptr, "Invalid palette length"); |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 530 | |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame] | 531 | else |
| 532 | { |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 533 | png_warning(png_ptr, "Invalid palette length"); |
Matt Sarett | 96be908 | 2016-05-03 13:29:54 -0400 | [diff] [blame] | 534 | |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 535 | return; |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame] | 536 | } |
| 537 | } |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 538 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 539 | if ((num_palette > 0 && palette == NULL) || |
| 540 | (num_palette == 0 |
| 541 | # ifdef PNG_MNG_FEATURES_SUPPORTED |
| 542 | && (png_ptr->mng_features_permitted & PNG_FLAG_MNG_EMPTY_PLTE) == 0 |
| 543 | # endif |
| 544 | )) |
| 545 | { |
Sireesh Tripurari | b478e66 | 2014-05-09 15:15:10 +0530 | [diff] [blame] | 546 | png_error(png_ptr, "Invalid palette"); |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 547 | } |
| 548 | |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 549 | /* It may not actually be necessary to set png_ptr->palette here; |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 550 | * we do it for backward compatibility with the way the png_handle_tRNS |
| 551 | * function used to do the allocation. |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 552 | * |
| 553 | * 1.6.0: the above statement appears to be incorrect; something has to set |
| 554 | * the palette inside png_struct on read. |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 555 | */ |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 556 | png_free_data(png_ptr, info_ptr, PNG_FREE_PLTE, 0); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 557 | |
| 558 | /* Changed in libpng-1.2.1 to allocate PNG_MAX_PALETTE_LENGTH instead |
Matt Sarett | 96be908 | 2016-05-03 13:29:54 -0400 | [diff] [blame] | 559 | * of num_palette entries, in case of an invalid PNG file or incorrect |
| 560 | * call to png_set_PLTE() with too-large sample values. |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame] | 561 | */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 562 | png_ptr->palette = png_voidcast(png_colorp, png_calloc(png_ptr, |
| 563 | PNG_MAX_PALETTE_LENGTH * (sizeof (png_color)))); |
| 564 | |
| 565 | if (num_palette > 0) |
| 566 | memcpy(png_ptr->palette, palette, num_palette * (sizeof (png_color))); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 567 | info_ptr->palette = png_ptr->palette; |
| 568 | info_ptr->num_palette = png_ptr->num_palette = (png_uint_16)num_palette; |
| 569 | |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 570 | info_ptr->free_me |= PNG_FREE_PLTE; |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 571 | |
| 572 | info_ptr->valid |= PNG_INFO_PLTE; |
| 573 | } |
| 574 | |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 575 | #ifdef PNG_sBIT_SUPPORTED |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 576 | void PNGAPI |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 577 | png_set_sBIT(png_const_structrp png_ptr, png_inforp info_ptr, |
| 578 | png_const_color_8p sig_bit) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 579 | { |
The Android Open Source Project | 4215dd1 | 2009-03-09 11:52:12 -0700 | [diff] [blame] | 580 | png_debug1(1, "in %s storage function", "sBIT"); |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 581 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 582 | if (png_ptr == NULL || info_ptr == NULL || sig_bit == NULL) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 583 | return; |
| 584 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 585 | info_ptr->sig_bit = *sig_bit; |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 586 | info_ptr->valid |= PNG_INFO_sBIT; |
| 587 | } |
| 588 | #endif |
| 589 | |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 590 | #ifdef PNG_sRGB_SUPPORTED |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 591 | void PNGAPI |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 592 | png_set_sRGB(png_const_structrp png_ptr, png_inforp info_ptr, int srgb_intent) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 593 | { |
The Android Open Source Project | 4215dd1 | 2009-03-09 11:52:12 -0700 | [diff] [blame] | 594 | png_debug1(1, "in %s storage function", "sRGB"); |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 595 | |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 596 | if (png_ptr == NULL || info_ptr == NULL) |
| 597 | return; |
| 598 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 599 | (void)png_colorspace_set_sRGB(png_ptr, &info_ptr->colorspace, srgb_intent); |
| 600 | png_colorspace_sync_info(png_ptr, info_ptr); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 601 | } |
| 602 | |
| 603 | void PNGAPI |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 604 | png_set_sRGB_gAMA_and_cHRM(png_const_structrp png_ptr, png_inforp info_ptr, |
| 605 | int srgb_intent) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 606 | { |
The Android Open Source Project | 4215dd1 | 2009-03-09 11:52:12 -0700 | [diff] [blame] | 607 | png_debug1(1, "in %s storage function", "sRGB_gAMA_and_cHRM"); |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 608 | |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 609 | if (png_ptr == NULL || info_ptr == NULL) |
| 610 | return; |
| 611 | |
Matt Sarett | 96be908 | 2016-05-03 13:29:54 -0400 | [diff] [blame] | 612 | if (png_colorspace_set_sRGB(png_ptr, &info_ptr->colorspace, |
| 613 | srgb_intent) != 0) |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 614 | { |
| 615 | /* This causes the gAMA and cHRM to be written too */ |
| 616 | info_ptr->colorspace.flags |= |
| 617 | PNG_COLORSPACE_FROM_gAMA|PNG_COLORSPACE_FROM_cHRM; |
| 618 | } |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 619 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 620 | png_colorspace_sync_info(png_ptr, info_ptr); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 621 | } |
The Android Open Source Project | 4215dd1 | 2009-03-09 11:52:12 -0700 | [diff] [blame] | 622 | #endif /* sRGB */ |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 623 | |
| 624 | |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 625 | #ifdef PNG_iCCP_SUPPORTED |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 626 | void PNGAPI |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 627 | png_set_iCCP(png_const_structrp png_ptr, png_inforp info_ptr, |
| 628 | png_const_charp name, int compression_type, |
| 629 | png_const_bytep profile, png_uint_32 proflen) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 630 | { |
| 631 | png_charp new_iccp_name; |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 632 | png_bytep new_iccp_profile; |
| 633 | png_size_t length; |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 634 | |
The Android Open Source Project | 4215dd1 | 2009-03-09 11:52:12 -0700 | [diff] [blame] | 635 | png_debug1(1, "in %s storage function", "iCCP"); |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 636 | |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 637 | if (png_ptr == NULL || info_ptr == NULL || name == NULL || profile == NULL) |
| 638 | return; |
| 639 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 640 | if (compression_type != PNG_COMPRESSION_TYPE_BASE) |
| 641 | png_app_error(png_ptr, "Invalid iCCP compression method"); |
| 642 | |
| 643 | /* Set the colorspace first because this validates the profile; do not |
| 644 | * override previously set app cHRM or gAMA here (because likely as not the |
| 645 | * application knows better than libpng what the correct values are.) Pass |
| 646 | * the info_ptr color_type field to png_colorspace_set_ICC because in the |
| 647 | * write case it has not yet been stored in png_ptr. |
| 648 | */ |
| 649 | { |
| 650 | int result = png_colorspace_set_ICC(png_ptr, &info_ptr->colorspace, name, |
| 651 | proflen, profile, info_ptr->color_type); |
| 652 | |
| 653 | png_colorspace_sync_info(png_ptr, info_ptr); |
| 654 | |
| 655 | /* Don't do any of the copying if the profile was bad, or inconsistent. */ |
Matt Sarett | 96be908 | 2016-05-03 13:29:54 -0400 | [diff] [blame] | 656 | if (result == 0) |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 657 | return; |
| 658 | |
| 659 | /* But do write the gAMA and cHRM chunks from the profile. */ |
| 660 | info_ptr->colorspace.flags |= |
| 661 | PNG_COLORSPACE_FROM_gAMA|PNG_COLORSPACE_FROM_cHRM; |
| 662 | } |
| 663 | |
| 664 | length = strlen(name)+1; |
| 665 | new_iccp_name = png_voidcast(png_charp, png_malloc_warn(png_ptr, length)); |
| 666 | |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 667 | if (new_iccp_name == NULL) |
| 668 | { |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 669 | png_benign_error(png_ptr, "Insufficient memory to process iCCP chunk"); |
Matt Sarett | 96be908 | 2016-05-03 13:29:54 -0400 | [diff] [blame] | 670 | |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 671 | return; |
| 672 | } |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 673 | |
| 674 | memcpy(new_iccp_name, name, length); |
| 675 | new_iccp_profile = png_voidcast(png_bytep, |
| 676 | png_malloc_warn(png_ptr, proflen)); |
| 677 | |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 678 | if (new_iccp_profile == NULL) |
| 679 | { |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 680 | png_free(png_ptr, new_iccp_name); |
| 681 | png_benign_error(png_ptr, |
| 682 | "Insufficient memory to process iCCP profile"); |
Matt Sarett | 96be908 | 2016-05-03 13:29:54 -0400 | [diff] [blame] | 683 | |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 684 | return; |
| 685 | } |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 686 | |
| 687 | memcpy(new_iccp_profile, profile, proflen); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 688 | |
| 689 | png_free_data(png_ptr, info_ptr, PNG_FREE_ICCP, 0); |
| 690 | |
| 691 | info_ptr->iccp_proflen = proflen; |
| 692 | info_ptr->iccp_name = new_iccp_name; |
| 693 | info_ptr->iccp_profile = new_iccp_profile; |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 694 | info_ptr->free_me |= PNG_FREE_ICCP; |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 695 | info_ptr->valid |= PNG_INFO_iCCP; |
| 696 | } |
| 697 | #endif |
| 698 | |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 699 | #ifdef PNG_TEXT_SUPPORTED |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 700 | void PNGAPI |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 701 | png_set_text(png_const_structrp png_ptr, png_inforp info_ptr, |
| 702 | png_const_textp text_ptr, int num_text) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 703 | { |
| 704 | int ret; |
The Android Open Source Project | 4215dd1 | 2009-03-09 11:52:12 -0700 | [diff] [blame] | 705 | ret = png_set_text_2(png_ptr, info_ptr, text_ptr, num_text); |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 706 | |
Matt Sarett | 96be908 | 2016-05-03 13:29:54 -0400 | [diff] [blame] | 707 | if (ret != 0) |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame] | 708 | png_error(png_ptr, "Insufficient memory to store text"); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 709 | } |
| 710 | |
| 711 | int /* PRIVATE */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 712 | png_set_text_2(png_const_structrp png_ptr, png_inforp info_ptr, |
| 713 | png_const_textp text_ptr, int num_text) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 714 | { |
| 715 | int i; |
| 716 | |
Matt Sarett | 96be908 | 2016-05-03 13:29:54 -0400 | [diff] [blame] | 717 | png_debug1(1, "in %lx storage function", png_ptr == NULL ? 0xabadca11U : |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 718 | (unsigned long)png_ptr->chunk_name); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 719 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 720 | if (png_ptr == NULL || info_ptr == NULL || num_text <= 0 || text_ptr == NULL) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 721 | return(0); |
| 722 | |
| 723 | /* Make sure we have enough space in the "text" array in info_struct |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 724 | * to hold all of the incoming text_ptr objects. This compare can't overflow |
| 725 | * because max_text >= num_text (anyway, subtract of two positive integers |
| 726 | * can't overflow in any case.) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 727 | */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 728 | if (num_text > info_ptr->max_text - info_ptr->num_text) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 729 | { |
Terry Heo (Woncheol) | 5e12401 | 2012-04-20 14:53:48 +0900 | [diff] [blame] | 730 | int old_num_text = info_ptr->num_text; |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 731 | int max_text; |
| 732 | png_textp new_text = NULL; |
Terry Heo (Woncheol) | 5e12401 | 2012-04-20 14:53:48 +0900 | [diff] [blame] | 733 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 734 | /* Calculate an appropriate max_text, checking for overflow. */ |
| 735 | max_text = old_num_text; |
| 736 | if (num_text <= INT_MAX - max_text) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 737 | { |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 738 | max_text += num_text; |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 739 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 740 | /* Round up to a multiple of 8 */ |
| 741 | if (max_text < INT_MAX-8) |
| 742 | max_text = (max_text + 8) & ~0x7; |
Terry Heo (Woncheol) | 5e12401 | 2012-04-20 14:53:48 +0900 | [diff] [blame] | 743 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 744 | else |
| 745 | max_text = INT_MAX; |
| 746 | |
Matt Sarett | 96be908 | 2016-05-03 13:29:54 -0400 | [diff] [blame] | 747 | /* Now allocate a new array and copy the old members in; this does all |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 748 | * the overflow checks. |
| 749 | */ |
| 750 | new_text = png_voidcast(png_textp,png_realloc_array(png_ptr, |
| 751 | info_ptr->text, old_num_text, max_text-old_num_text, |
| 752 | sizeof *new_text)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 753 | } |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 754 | |
| 755 | if (new_text == NULL) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 756 | { |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 757 | png_chunk_report(png_ptr, "too many text chunks", |
| 758 | PNG_CHUNK_WRITE_ERROR); |
Matt Sarett | 96be908 | 2016-05-03 13:29:54 -0400 | [diff] [blame] | 759 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 760 | return 1; |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 761 | } |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 762 | |
| 763 | png_free(png_ptr, info_ptr->text); |
| 764 | |
| 765 | info_ptr->text = new_text; |
| 766 | info_ptr->free_me |= PNG_FREE_TEXT; |
| 767 | info_ptr->max_text = max_text; |
| 768 | /* num_text is adjusted below as the entries are copied in */ |
| 769 | |
| 770 | png_debug1(3, "allocated %d entries for info_ptr->text", max_text); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 771 | } |
Terry Heo (Woncheol) | 5e12401 | 2012-04-20 14:53:48 +0900 | [diff] [blame] | 772 | |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 773 | for (i = 0; i < num_text; i++) |
| 774 | { |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 775 | size_t text_length, key_len; |
| 776 | size_t lang_len, lang_key_len; |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 777 | png_textp textp = &(info_ptr->text[info_ptr->num_text]); |
| 778 | |
| 779 | if (text_ptr[i].key == NULL) |
| 780 | continue; |
| 781 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 782 | if (text_ptr[i].compression < PNG_TEXT_COMPRESSION_NONE || |
| 783 | text_ptr[i].compression >= PNG_TEXT_COMPRESSION_LAST) |
| 784 | { |
| 785 | png_chunk_report(png_ptr, "text compression mode is out of range", |
| 786 | PNG_CHUNK_WRITE_ERROR); |
| 787 | continue; |
| 788 | } |
| 789 | |
| 790 | key_len = strlen(text_ptr[i].key); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 791 | |
The Android Open Source Project | 4215dd1 | 2009-03-09 11:52:12 -0700 | [diff] [blame] | 792 | if (text_ptr[i].compression <= 0) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 793 | { |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame] | 794 | lang_len = 0; |
| 795 | lang_key_len = 0; |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 796 | } |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 797 | |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 798 | else |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 799 | # ifdef PNG_iTXt_SUPPORTED |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 800 | { |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame] | 801 | /* Set iTXt data */ |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 802 | |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame] | 803 | if (text_ptr[i].lang != NULL) |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 804 | lang_len = strlen(text_ptr[i].lang); |
| 805 | |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame] | 806 | else |
| 807 | lang_len = 0; |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 808 | |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame] | 809 | if (text_ptr[i].lang_key != NULL) |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 810 | lang_key_len = strlen(text_ptr[i].lang_key); |
| 811 | |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame] | 812 | else |
| 813 | lang_key_len = 0; |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 814 | } |
Matt Sarett | 96be908 | 2016-05-03 13:29:54 -0400 | [diff] [blame] | 815 | # else /* iTXt */ |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 816 | { |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 817 | png_chunk_report(png_ptr, "iTXt chunk not supported", |
| 818 | PNG_CHUNK_WRITE_ERROR); |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame] | 819 | continue; |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 820 | } |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 821 | # endif |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 822 | |
| 823 | if (text_ptr[i].text == NULL || text_ptr[i].text[0] == '\0') |
| 824 | { |
| 825 | text_length = 0; |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 826 | # ifdef PNG_iTXt_SUPPORTED |
The Android Open Source Project | 4215dd1 | 2009-03-09 11:52:12 -0700 | [diff] [blame] | 827 | if (text_ptr[i].compression > 0) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 828 | textp->compression = PNG_ITXT_COMPRESSION_NONE; |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 829 | |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 830 | else |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 831 | # endif |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 832 | textp->compression = PNG_TEXT_COMPRESSION_NONE; |
| 833 | } |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 834 | |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 835 | else |
| 836 | { |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 837 | text_length = strlen(text_ptr[i].text); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 838 | textp->compression = text_ptr[i].compression; |
| 839 | } |
| 840 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 841 | textp->key = png_voidcast(png_charp,png_malloc_base(png_ptr, |
| 842 | key_len + text_length + lang_len + lang_key_len + 4)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 843 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 844 | if (textp->key == NULL) |
| 845 | { |
| 846 | png_chunk_report(png_ptr, "text chunk: out of memory", |
| 847 | PNG_CHUNK_WRITE_ERROR); |
Matt Sarett | 96be908 | 2016-05-03 13:29:54 -0400 | [diff] [blame] | 848 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 849 | return 1; |
| 850 | } |
| 851 | |
| 852 | png_debug2(2, "Allocated %lu bytes at %p in png_set_text", |
| 853 | (unsigned long)(png_uint_32) |
| 854 | (key_len + lang_len + lang_key_len + text_length + 4), |
| 855 | textp->key); |
| 856 | |
| 857 | memcpy(textp->key, text_ptr[i].key, key_len); |
The Android Open Source Project | 4215dd1 | 2009-03-09 11:52:12 -0700 | [diff] [blame] | 858 | *(textp->key + key_len) = '\0'; |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 859 | |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 860 | if (text_ptr[i].compression > 0) |
| 861 | { |
The Android Open Source Project | 4215dd1 | 2009-03-09 11:52:12 -0700 | [diff] [blame] | 862 | textp->lang = textp->key + key_len + 1; |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 863 | memcpy(textp->lang, text_ptr[i].lang, lang_len); |
The Android Open Source Project | 4215dd1 | 2009-03-09 11:52:12 -0700 | [diff] [blame] | 864 | *(textp->lang + lang_len) = '\0'; |
| 865 | textp->lang_key = textp->lang + lang_len + 1; |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 866 | memcpy(textp->lang_key, text_ptr[i].lang_key, lang_key_len); |
The Android Open Source Project | 4215dd1 | 2009-03-09 11:52:12 -0700 | [diff] [blame] | 867 | *(textp->lang_key + lang_key_len) = '\0'; |
| 868 | textp->text = textp->lang_key + lang_key_len + 1; |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 869 | } |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 870 | |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 871 | else |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 872 | { |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 873 | textp->lang=NULL; |
| 874 | textp->lang_key=NULL; |
The Android Open Source Project | 4215dd1 | 2009-03-09 11:52:12 -0700 | [diff] [blame] | 875 | textp->text = textp->key + key_len + 1; |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 876 | } |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 877 | |
Matt Sarett | 96be908 | 2016-05-03 13:29:54 -0400 | [diff] [blame] | 878 | if (text_length != 0) |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 879 | memcpy(textp->text, text_ptr[i].text, text_length); |
| 880 | |
The Android Open Source Project | 4215dd1 | 2009-03-09 11:52:12 -0700 | [diff] [blame] | 881 | *(textp->text + text_length) = '\0'; |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 882 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 883 | # ifdef PNG_iTXt_SUPPORTED |
The Android Open Source Project | 4215dd1 | 2009-03-09 11:52:12 -0700 | [diff] [blame] | 884 | if (textp->compression > 0) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 885 | { |
| 886 | textp->text_length = 0; |
| 887 | textp->itxt_length = text_length; |
| 888 | } |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 889 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 890 | else |
| 891 | # endif |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 892 | { |
| 893 | textp->text_length = text_length; |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 894 | textp->itxt_length = 0; |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 895 | } |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 896 | |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 897 | info_ptr->num_text++; |
The Android Open Source Project | 4215dd1 | 2009-03-09 11:52:12 -0700 | [diff] [blame] | 898 | png_debug1(3, "transferred text chunk %d", info_ptr->num_text); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 899 | } |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 900 | |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 901 | return(0); |
| 902 | } |
| 903 | #endif |
| 904 | |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 905 | #ifdef PNG_tIME_SUPPORTED |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 906 | void PNGAPI |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 907 | png_set_tIME(png_const_structrp png_ptr, png_inforp info_ptr, |
| 908 | png_const_timep mod_time) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 909 | { |
The Android Open Source Project | 4215dd1 | 2009-03-09 11:52:12 -0700 | [diff] [blame] | 910 | png_debug1(1, "in %s storage function", "tIME"); |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 911 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 912 | if (png_ptr == NULL || info_ptr == NULL || mod_time == NULL || |
Matt Sarett | 96be908 | 2016-05-03 13:29:54 -0400 | [diff] [blame] | 913 | (png_ptr->mode & PNG_WROTE_tIME) != 0) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 914 | return; |
| 915 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 916 | if (mod_time->month == 0 || mod_time->month > 12 || |
| 917 | mod_time->day == 0 || mod_time->day > 31 || |
| 918 | mod_time->hour > 23 || mod_time->minute > 59 || |
| 919 | mod_time->second > 60) |
| 920 | { |
| 921 | png_warning(png_ptr, "Ignoring invalid time value"); |
Matt Sarett | 96be908 | 2016-05-03 13:29:54 -0400 | [diff] [blame] | 922 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 923 | return; |
| 924 | } |
| 925 | |
| 926 | info_ptr->mod_time = *mod_time; |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 927 | info_ptr->valid |= PNG_INFO_tIME; |
| 928 | } |
| 929 | #endif |
| 930 | |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 931 | #ifdef PNG_tRNS_SUPPORTED |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 932 | void PNGAPI |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 933 | png_set_tRNS(png_structrp png_ptr, png_inforp info_ptr, |
| 934 | png_const_bytep trans_alpha, int num_trans, png_const_color_16p trans_color) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 935 | { |
The Android Open Source Project | 4215dd1 | 2009-03-09 11:52:12 -0700 | [diff] [blame] | 936 | png_debug1(1, "in %s storage function", "tRNS"); |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 937 | |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 938 | if (png_ptr == NULL || info_ptr == NULL) |
Matt Sarett | 96be908 | 2016-05-03 13:29:54 -0400 | [diff] [blame] | 939 | |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 940 | return; |
| 941 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 942 | if (trans_alpha != NULL) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 943 | { |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 944 | /* It may not actually be necessary to set png_ptr->trans_alpha here; |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 945 | * we do it for backward compatibility with the way the png_handle_tRNS |
| 946 | * function used to do the allocation. |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 947 | * |
| 948 | * 1.6.0: The above statement is incorrect; png_handle_tRNS effectively |
| 949 | * relies on png_set_tRNS storing the information in png_struct |
| 950 | * (otherwise it won't be there for the code in pngrtran.c). |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 951 | */ |
| 952 | |
The Android Open Source Project | 4215dd1 | 2009-03-09 11:52:12 -0700 | [diff] [blame] | 953 | png_free_data(png_ptr, info_ptr, PNG_FREE_TRNS, 0); |
The Android Open Source Project | 4215dd1 | 2009-03-09 11:52:12 -0700 | [diff] [blame] | 954 | |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 955 | /* Changed from num_trans to PNG_MAX_PALETTE_LENGTH in version 1.2.1 */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 956 | png_ptr->trans_alpha = info_ptr->trans_alpha = png_voidcast(png_bytep, |
| 957 | png_malloc(png_ptr, PNG_MAX_PALETTE_LENGTH)); |
| 958 | |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 959 | if (num_trans > 0 && num_trans <= PNG_MAX_PALETTE_LENGTH) |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 960 | memcpy(info_ptr->trans_alpha, trans_alpha, (png_size_t)num_trans); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 961 | } |
| 962 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 963 | if (trans_color != NULL) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 964 | { |
Matt Sarett | 96be908 | 2016-05-03 13:29:54 -0400 | [diff] [blame] | 965 | #ifdef PNG_WARNINGS_SUPPORTED |
| 966 | if (info_ptr->bit_depth < 16) |
| 967 | { |
| 968 | int sample_max = (1 << info_ptr->bit_depth) - 1; |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 969 | |
Matt Sarett | 96be908 | 2016-05-03 13:29:54 -0400 | [diff] [blame] | 970 | if ((info_ptr->color_type == PNG_COLOR_TYPE_GRAY && |
| 971 | trans_color->gray > sample_max) || |
| 972 | (info_ptr->color_type == PNG_COLOR_TYPE_RGB && |
| 973 | (trans_color->red > sample_max || |
| 974 | trans_color->green > sample_max || |
| 975 | trans_color->blue > sample_max))) |
| 976 | png_warning(png_ptr, |
| 977 | "tRNS chunk has out-of-range samples for bit_depth"); |
| 978 | } |
| 979 | #endif |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 980 | |
| 981 | info_ptr->trans_color = *trans_color; |
| 982 | |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 983 | if (num_trans == 0) |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame] | 984 | num_trans = 1; |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 985 | } |
| 986 | |
| 987 | info_ptr->num_trans = (png_uint_16)num_trans; |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 988 | |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 989 | if (num_trans != 0) |
| 990 | { |
| 991 | info_ptr->valid |= PNG_INFO_tRNS; |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 992 | info_ptr->free_me |= PNG_FREE_TRNS; |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 993 | } |
| 994 | } |
| 995 | #endif |
| 996 | |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 997 | #ifdef PNG_sPLT_SUPPORTED |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 998 | void PNGAPI |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 999 | png_set_sPLT(png_const_structrp png_ptr, |
| 1000 | png_inforp info_ptr, png_const_sPLT_tp entries, int nentries) |
The Android Open Source Project | 4215dd1 | 2009-03-09 11:52:12 -0700 | [diff] [blame] | 1001 | /* |
| 1002 | * entries - array of png_sPLT_t structures |
| 1003 | * to be added to the list of palettes |
| 1004 | * in the info structure. |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1005 | * |
The Android Open Source Project | 4215dd1 | 2009-03-09 11:52:12 -0700 | [diff] [blame] | 1006 | * nentries - number of palette structures to be |
| 1007 | * added. |
| 1008 | */ |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1009 | { |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame] | 1010 | png_sPLT_tp np; |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1011 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1012 | if (png_ptr == NULL || info_ptr == NULL || nentries <= 0 || entries == NULL) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1013 | return; |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1014 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1015 | /* Use the internal realloc function, which checks for all the possible |
| 1016 | * overflows. Notice that the parameters are (int) and (size_t) |
| 1017 | */ |
| 1018 | np = png_voidcast(png_sPLT_tp,png_realloc_array(png_ptr, |
| 1019 | info_ptr->splt_palettes, info_ptr->splt_palettes_num, nentries, |
| 1020 | sizeof *np)); |
| 1021 | |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame] | 1022 | if (np == NULL) |
| 1023 | { |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1024 | /* Out of memory or too many chunks */ |
| 1025 | png_chunk_report(png_ptr, "too many sPLT chunks", PNG_CHUNK_WRITE_ERROR); |
Matt Sarett | 96be908 | 2016-05-03 13:29:54 -0400 | [diff] [blame] | 1026 | |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 1027 | return; |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame] | 1028 | } |
The Android Open Source Project | 4215dd1 | 2009-03-09 11:52:12 -0700 | [diff] [blame] | 1029 | |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame] | 1030 | png_free(png_ptr, info_ptr->splt_palettes); |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame] | 1031 | info_ptr->splt_palettes = np; |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame] | 1032 | info_ptr->free_me |= PNG_FREE_SPLT; |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1033 | |
| 1034 | np += info_ptr->splt_palettes_num; |
| 1035 | |
| 1036 | do |
| 1037 | { |
| 1038 | png_size_t length; |
| 1039 | |
| 1040 | /* Skip invalid input entries */ |
| 1041 | if (entries->name == NULL || entries->entries == NULL) |
| 1042 | { |
| 1043 | /* png_handle_sPLT doesn't do this, so this is an app error */ |
| 1044 | png_app_error(png_ptr, "png_set_sPLT: invalid sPLT"); |
| 1045 | /* Just skip the invalid entry */ |
| 1046 | continue; |
| 1047 | } |
| 1048 | |
| 1049 | np->depth = entries->depth; |
| 1050 | |
Matt Sarett | 96be908 | 2016-05-03 13:29:54 -0400 | [diff] [blame] | 1051 | /* In the event of out-of-memory just return - there's no point keeping |
| 1052 | * on trying to add sPLT chunks. |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1053 | */ |
| 1054 | length = strlen(entries->name) + 1; |
| 1055 | np->name = png_voidcast(png_charp, png_malloc_base(png_ptr, length)); |
| 1056 | |
| 1057 | if (np->name == NULL) |
| 1058 | break; |
| 1059 | |
| 1060 | memcpy(np->name, entries->name, length); |
| 1061 | |
| 1062 | /* IMPORTANT: we have memory now that won't get freed if something else |
Matt Sarett | 96be908 | 2016-05-03 13:29:54 -0400 | [diff] [blame] | 1063 | * goes wrong; this code must free it. png_malloc_array produces no |
| 1064 | * warnings; use a png_chunk_report (below) if there is an error. |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1065 | */ |
| 1066 | np->entries = png_voidcast(png_sPLT_entryp, png_malloc_array(png_ptr, |
| 1067 | entries->nentries, sizeof (png_sPLT_entry))); |
| 1068 | |
| 1069 | if (np->entries == NULL) |
| 1070 | { |
| 1071 | png_free(png_ptr, np->name); |
Matt Sarett | 96be908 | 2016-05-03 13:29:54 -0400 | [diff] [blame] | 1072 | np->name = NULL; |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1073 | break; |
| 1074 | } |
| 1075 | |
| 1076 | np->nentries = entries->nentries; |
| 1077 | /* This multiply can't overflow because png_malloc_array has already |
| 1078 | * checked it when doing the allocation. |
| 1079 | */ |
| 1080 | memcpy(np->entries, entries->entries, |
| 1081 | entries->nentries * sizeof (png_sPLT_entry)); |
| 1082 | |
| 1083 | /* Note that 'continue' skips the advance of the out pointer and out |
| 1084 | * count, so an invalid entry is not added. |
| 1085 | */ |
| 1086 | info_ptr->valid |= PNG_INFO_sPLT; |
| 1087 | ++(info_ptr->splt_palettes_num); |
| 1088 | ++np; |
| 1089 | } |
| 1090 | while (++entries, --nentries); |
| 1091 | |
| 1092 | if (nentries > 0) |
| 1093 | png_chunk_report(png_ptr, "sPLT out of memory", PNG_CHUNK_WRITE_ERROR); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1094 | } |
Matt Sarett | 96be908 | 2016-05-03 13:29:54 -0400 | [diff] [blame] | 1095 | #endif /* sPLT */ |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1096 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1097 | #ifdef PNG_STORE_UNKNOWN_CHUNKS_SUPPORTED |
| 1098 | static png_byte |
| 1099 | check_location(png_const_structrp png_ptr, int location) |
| 1100 | { |
| 1101 | location &= (PNG_HAVE_IHDR|PNG_HAVE_PLTE|PNG_AFTER_IDAT); |
| 1102 | |
| 1103 | /* New in 1.6.0; copy the location and check it. This is an API |
Matt Sarett | 96be908 | 2016-05-03 13:29:54 -0400 | [diff] [blame] | 1104 | * change; previously the app had to use the |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1105 | * png_set_unknown_chunk_location API below for each chunk. |
| 1106 | */ |
Matt Sarett | 96be908 | 2016-05-03 13:29:54 -0400 | [diff] [blame] | 1107 | if (location == 0 && (png_ptr->mode & PNG_IS_READ_STRUCT) == 0) |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1108 | { |
| 1109 | /* Write struct, so unknown chunks come from the app */ |
| 1110 | png_app_warning(png_ptr, |
| 1111 | "png_set_unknown_chunks now expects a valid location"); |
| 1112 | /* Use the old behavior */ |
| 1113 | location = (png_byte)(png_ptr->mode & |
| 1114 | (PNG_HAVE_IHDR|PNG_HAVE_PLTE|PNG_AFTER_IDAT)); |
| 1115 | } |
| 1116 | |
| 1117 | /* This need not be an internal error - if the app calls |
| 1118 | * png_set_unknown_chunks on a read pointer it must get the location right. |
| 1119 | */ |
| 1120 | if (location == 0) |
| 1121 | png_error(png_ptr, "invalid location in png_set_unknown_chunks"); |
| 1122 | |
| 1123 | /* Now reduce the location to the top-most set bit by removing each least |
| 1124 | * significant bit in turn. |
| 1125 | */ |
| 1126 | while (location != (location & -location)) |
| 1127 | location &= ~(location & -location); |
| 1128 | |
| 1129 | /* The cast is safe because 'location' is a bit mask and only the low four |
| 1130 | * bits are significant. |
| 1131 | */ |
| 1132 | return (png_byte)location; |
| 1133 | } |
| 1134 | |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1135 | void PNGAPI |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1136 | png_set_unknown_chunks(png_const_structrp png_ptr, |
| 1137 | png_inforp info_ptr, png_const_unknown_chunkp unknowns, int num_unknowns) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1138 | { |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame] | 1139 | png_unknown_chunkp np; |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1140 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1141 | if (png_ptr == NULL || info_ptr == NULL || num_unknowns <= 0 || |
Matt Sarett | 96be908 | 2016-05-03 13:29:54 -0400 | [diff] [blame] | 1142 | unknowns == NULL) |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame] | 1143 | return; |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1144 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1145 | /* Check for the failure cases where support has been disabled at compile |
| 1146 | * time. This code is hardly ever compiled - it's here because |
| 1147 | * STORE_UNKNOWN_CHUNKS is set by both read and write code (compiling in this |
| 1148 | * code) but may be meaningless if the read or write handling of unknown |
| 1149 | * chunks is not compiled in. |
| 1150 | */ |
| 1151 | # if !defined(PNG_READ_UNKNOWN_CHUNKS_SUPPORTED) && \ |
| 1152 | defined(PNG_READ_SUPPORTED) |
Matt Sarett | 96be908 | 2016-05-03 13:29:54 -0400 | [diff] [blame] | 1153 | if ((png_ptr->mode & PNG_IS_READ_STRUCT) != 0) |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1154 | { |
| 1155 | png_app_error(png_ptr, "no unknown chunk support on read"); |
Matt Sarett | 96be908 | 2016-05-03 13:29:54 -0400 | [diff] [blame] | 1156 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1157 | return; |
| 1158 | } |
| 1159 | # endif |
| 1160 | # if !defined(PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED) && \ |
| 1161 | defined(PNG_WRITE_SUPPORTED) |
Matt Sarett | 96be908 | 2016-05-03 13:29:54 -0400 | [diff] [blame] | 1162 | if ((png_ptr->mode & PNG_IS_READ_STRUCT) == 0) |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1163 | { |
| 1164 | png_app_error(png_ptr, "no unknown chunk support on write"); |
Matt Sarett | 96be908 | 2016-05-03 13:29:54 -0400 | [diff] [blame] | 1165 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1166 | return; |
| 1167 | } |
| 1168 | # endif |
| 1169 | |
| 1170 | /* Prior to 1.6.0 this code used png_malloc_warn; however, this meant that |
| 1171 | * unknown critical chunks could be lost with just a warning resulting in |
| 1172 | * undefined behavior. Now png_chunk_report is used to provide behavior |
| 1173 | * appropriate to read or write. |
| 1174 | */ |
| 1175 | np = png_voidcast(png_unknown_chunkp, png_realloc_array(png_ptr, |
| 1176 | info_ptr->unknown_chunks, info_ptr->unknown_chunks_num, num_unknowns, |
| 1177 | sizeof *np)); |
| 1178 | |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame] | 1179 | if (np == NULL) |
| 1180 | { |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1181 | png_chunk_report(png_ptr, "too many unknown chunks", |
| 1182 | PNG_CHUNK_WRITE_ERROR); |
Matt Sarett | 96be908 | 2016-05-03 13:29:54 -0400 | [diff] [blame] | 1183 | |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame] | 1184 | return; |
| 1185 | } |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1186 | |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame] | 1187 | png_free(png_ptr, info_ptr->unknown_chunks); |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1188 | info_ptr->unknown_chunks = np; /* safe because it is initialized */ |
| 1189 | info_ptr->free_me |= PNG_FREE_UNKN; |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1190 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1191 | np += info_ptr->unknown_chunks_num; |
| 1192 | |
| 1193 | /* Increment unknown_chunks_num each time round the loop to protect the |
| 1194 | * just-allocated chunk data. |
| 1195 | */ |
| 1196 | for (; num_unknowns > 0; --num_unknowns, ++unknowns) |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame] | 1197 | { |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1198 | memcpy(np->name, unknowns->name, (sizeof np->name)); |
| 1199 | np->name[(sizeof np->name)-1] = '\0'; |
| 1200 | np->location = check_location(png_ptr, unknowns->location); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1201 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1202 | if (unknowns->size == 0) |
| 1203 | { |
| 1204 | np->data = NULL; |
| 1205 | np->size = 0; |
| 1206 | } |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1207 | |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame] | 1208 | else |
| 1209 | { |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1210 | np->data = png_voidcast(png_bytep, |
| 1211 | png_malloc_base(png_ptr, unknowns->size)); |
| 1212 | |
| 1213 | if (np->data == NULL) |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame] | 1214 | { |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1215 | png_chunk_report(png_ptr, "unknown chunk: out of memory", |
| 1216 | PNG_CHUNK_WRITE_ERROR); |
| 1217 | /* But just skip storing the unknown chunk */ |
| 1218 | continue; |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame] | 1219 | } |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1220 | |
| 1221 | memcpy(np->data, unknowns->data, unknowns->size); |
| 1222 | np->size = unknowns->size; |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame] | 1223 | } |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1224 | |
| 1225 | /* These increments are skipped on out-of-memory for the data - the |
| 1226 | * unknown chunk entry gets overwritten if the png_chunk_report returns. |
| 1227 | * This is correct in the read case (the chunk is just dropped.) |
| 1228 | */ |
| 1229 | ++np; |
| 1230 | ++(info_ptr->unknown_chunks_num); |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame] | 1231 | } |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1232 | } |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1233 | |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1234 | void PNGAPI |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1235 | png_set_unknown_chunk_location(png_const_structrp png_ptr, png_inforp info_ptr, |
| 1236 | int chunk, int location) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1237 | { |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1238 | /* This API is pretty pointless in 1.6.0 because the location can be set |
| 1239 | * before the call to png_set_unknown_chunks. |
| 1240 | * |
| 1241 | * TODO: add a png_app_warning in 1.7 |
| 1242 | */ |
| 1243 | if (png_ptr != NULL && info_ptr != NULL && chunk >= 0 && |
| 1244 | chunk < info_ptr->unknown_chunks_num) |
| 1245 | { |
| 1246 | if ((location & (PNG_HAVE_IHDR|PNG_HAVE_PLTE|PNG_AFTER_IDAT)) == 0) |
| 1247 | { |
| 1248 | png_app_error(png_ptr, "invalid unknown chunk location"); |
| 1249 | /* Fake out the pre 1.6.0 behavior: */ |
Matt Sarett | 96be908 | 2016-05-03 13:29:54 -0400 | [diff] [blame] | 1250 | if ((location & PNG_HAVE_IDAT) != 0) /* undocumented! */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1251 | location = PNG_AFTER_IDAT; |
| 1252 | |
| 1253 | else |
| 1254 | location = PNG_HAVE_IHDR; /* also undocumented */ |
| 1255 | } |
| 1256 | |
| 1257 | info_ptr->unknown_chunks[chunk].location = |
| 1258 | check_location(png_ptr, location); |
| 1259 | } |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1260 | } |
Matt Sarett | 96be908 | 2016-05-03 13:29:54 -0400 | [diff] [blame] | 1261 | #endif /* STORE_UNKNOWN_CHUNKS */ |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1262 | |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 1263 | #ifdef PNG_MNG_FEATURES_SUPPORTED |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1264 | png_uint_32 PNGAPI |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1265 | png_permit_mng_features (png_structrp png_ptr, png_uint_32 mng_features) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1266 | { |
The Android Open Source Project | 4215dd1 | 2009-03-09 11:52:12 -0700 | [diff] [blame] | 1267 | png_debug(1, "in png_permit_mng_features"); |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 1268 | |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1269 | if (png_ptr == NULL) |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1270 | return 0; |
| 1271 | |
| 1272 | png_ptr->mng_features_permitted = mng_features & PNG_ALL_MNG_FEATURES; |
| 1273 | |
| 1274 | return png_ptr->mng_features_permitted; |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1275 | } |
| 1276 | #endif |
| 1277 | |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 1278 | #ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1279 | static unsigned int |
| 1280 | add_one_chunk(png_bytep list, unsigned int count, png_const_bytep add, int keep) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1281 | { |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1282 | unsigned int i; |
| 1283 | |
| 1284 | /* Utility function: update the 'keep' state of a chunk if it is already in |
| 1285 | * the list, otherwise add it to the list. |
| 1286 | */ |
Matt Sarett | 96be908 | 2016-05-03 13:29:54 -0400 | [diff] [blame] | 1287 | for (i=0; i<count; ++i, list += 5) |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1288 | { |
Matt Sarett | 96be908 | 2016-05-03 13:29:54 -0400 | [diff] [blame] | 1289 | if (memcmp(list, add, 4) == 0) |
| 1290 | { |
| 1291 | list[4] = (png_byte)keep; |
| 1292 | |
| 1293 | return count; |
| 1294 | } |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1295 | } |
| 1296 | |
| 1297 | if (keep != PNG_HANDLE_CHUNK_AS_DEFAULT) |
| 1298 | { |
| 1299 | ++count; |
| 1300 | memcpy(list, add, 4); |
| 1301 | list[4] = (png_byte)keep; |
| 1302 | } |
| 1303 | |
| 1304 | return count; |
| 1305 | } |
| 1306 | |
| 1307 | void PNGAPI |
| 1308 | png_set_keep_unknown_chunks(png_structrp png_ptr, int keep, |
| 1309 | png_const_bytep chunk_list, int num_chunks_in) |
| 1310 | { |
| 1311 | png_bytep new_list; |
| 1312 | unsigned int num_chunks, old_num_chunks; |
| 1313 | |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame] | 1314 | if (png_ptr == NULL) |
| 1315 | return; |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1316 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1317 | if (keep < 0 || keep >= PNG_HANDLE_CHUNK_LAST) |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame] | 1318 | { |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1319 | png_app_error(png_ptr, "png_set_keep_unknown_chunks: invalid keep"); |
Matt Sarett | 96be908 | 2016-05-03 13:29:54 -0400 | [diff] [blame] | 1320 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1321 | return; |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame] | 1322 | } |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1323 | |
| 1324 | if (num_chunks_in <= 0) |
| 1325 | { |
| 1326 | png_ptr->unknown_default = keep; |
| 1327 | |
| 1328 | /* '0' means just set the flags, so stop here */ |
| 1329 | if (num_chunks_in == 0) |
| 1330 | return; |
| 1331 | } |
| 1332 | |
| 1333 | if (num_chunks_in < 0) |
| 1334 | { |
| 1335 | /* Ignore all unknown chunks and all chunks recognized by |
| 1336 | * libpng except for IHDR, PLTE, tRNS, IDAT, and IEND |
| 1337 | */ |
| 1338 | static PNG_CONST png_byte chunks_to_ignore[] = { |
| 1339 | 98, 75, 71, 68, '\0', /* bKGD */ |
| 1340 | 99, 72, 82, 77, '\0', /* cHRM */ |
| 1341 | 103, 65, 77, 65, '\0', /* gAMA */ |
| 1342 | 104, 73, 83, 84, '\0', /* hIST */ |
| 1343 | 105, 67, 67, 80, '\0', /* iCCP */ |
| 1344 | 105, 84, 88, 116, '\0', /* iTXt */ |
| 1345 | 111, 70, 70, 115, '\0', /* oFFs */ |
| 1346 | 112, 67, 65, 76, '\0', /* pCAL */ |
| 1347 | 112, 72, 89, 115, '\0', /* pHYs */ |
| 1348 | 115, 66, 73, 84, '\0', /* sBIT */ |
| 1349 | 115, 67, 65, 76, '\0', /* sCAL */ |
| 1350 | 115, 80, 76, 84, '\0', /* sPLT */ |
| 1351 | 115, 84, 69, 82, '\0', /* sTER */ |
| 1352 | 115, 82, 71, 66, '\0', /* sRGB */ |
| 1353 | 116, 69, 88, 116, '\0', /* tEXt */ |
| 1354 | 116, 73, 77, 69, '\0', /* tIME */ |
| 1355 | 122, 84, 88, 116, '\0' /* zTXt */ |
| 1356 | }; |
| 1357 | |
| 1358 | chunk_list = chunks_to_ignore; |
Matt Sarett | 96be908 | 2016-05-03 13:29:54 -0400 | [diff] [blame] | 1359 | num_chunks = (unsigned int)/*SAFE*/(sizeof chunks_to_ignore)/5U; |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1360 | } |
| 1361 | |
| 1362 | else /* num_chunks_in > 0 */ |
| 1363 | { |
| 1364 | if (chunk_list == NULL) |
| 1365 | { |
| 1366 | /* Prior to 1.6.0 this was silently ignored, now it is an app_error |
| 1367 | * which can be switched off. |
| 1368 | */ |
| 1369 | png_app_error(png_ptr, "png_set_keep_unknown_chunks: no chunk list"); |
Matt Sarett | 96be908 | 2016-05-03 13:29:54 -0400 | [diff] [blame] | 1370 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1371 | return; |
| 1372 | } |
| 1373 | |
| 1374 | num_chunks = num_chunks_in; |
| 1375 | } |
| 1376 | |
| 1377 | old_num_chunks = png_ptr->num_chunk_list; |
| 1378 | if (png_ptr->chunk_list == NULL) |
| 1379 | old_num_chunks = 0; |
| 1380 | |
| 1381 | /* Since num_chunks is always restricted to UINT_MAX/5 this can't overflow. |
| 1382 | */ |
| 1383 | if (num_chunks + old_num_chunks > UINT_MAX/5) |
| 1384 | { |
| 1385 | png_app_error(png_ptr, "png_set_keep_unknown_chunks: too many chunks"); |
Matt Sarett | 96be908 | 2016-05-03 13:29:54 -0400 | [diff] [blame] | 1386 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1387 | return; |
| 1388 | } |
| 1389 | |
| 1390 | /* If these chunks are being reset to the default then no more memory is |
| 1391 | * required because add_one_chunk above doesn't extend the list if the 'keep' |
| 1392 | * parameter is the default. |
| 1393 | */ |
Matt Sarett | 96be908 | 2016-05-03 13:29:54 -0400 | [diff] [blame] | 1394 | if (keep != 0) |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1395 | { |
| 1396 | new_list = png_voidcast(png_bytep, png_malloc(png_ptr, |
| 1397 | 5 * (num_chunks + old_num_chunks))); |
| 1398 | |
| 1399 | if (old_num_chunks > 0) |
| 1400 | memcpy(new_list, png_ptr->chunk_list, 5*old_num_chunks); |
| 1401 | } |
| 1402 | |
| 1403 | else if (old_num_chunks > 0) |
| 1404 | new_list = png_ptr->chunk_list; |
| 1405 | |
| 1406 | else |
| 1407 | new_list = NULL; |
| 1408 | |
| 1409 | /* Add the new chunks together with each one's handling code. If the chunk |
| 1410 | * already exists the code is updated, otherwise the chunk is added to the |
| 1411 | * end. (In libpng 1.6.0 order no longer matters because this code enforces |
| 1412 | * the earlier convention that the last setting is the one that is used.) |
| 1413 | */ |
| 1414 | if (new_list != NULL) |
| 1415 | { |
| 1416 | png_const_bytep inlist; |
| 1417 | png_bytep outlist; |
| 1418 | unsigned int i; |
| 1419 | |
| 1420 | for (i=0; i<num_chunks; ++i) |
Matt Sarett | 96be908 | 2016-05-03 13:29:54 -0400 | [diff] [blame] | 1421 | { |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1422 | old_num_chunks = add_one_chunk(new_list, old_num_chunks, |
| 1423 | chunk_list+5*i, keep); |
Matt Sarett | 96be908 | 2016-05-03 13:29:54 -0400 | [diff] [blame] | 1424 | } |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1425 | |
| 1426 | /* Now remove any spurious 'default' entries. */ |
| 1427 | num_chunks = 0; |
| 1428 | for (i=0, inlist=outlist=new_list; i<old_num_chunks; ++i, inlist += 5) |
Matt Sarett | 96be908 | 2016-05-03 13:29:54 -0400 | [diff] [blame] | 1429 | { |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1430 | if (inlist[4]) |
| 1431 | { |
| 1432 | if (outlist != inlist) |
| 1433 | memcpy(outlist, inlist, 5); |
| 1434 | outlist += 5; |
| 1435 | ++num_chunks; |
| 1436 | } |
Matt Sarett | 96be908 | 2016-05-03 13:29:54 -0400 | [diff] [blame] | 1437 | } |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1438 | |
| 1439 | /* This means the application has removed all the specialized handling. */ |
| 1440 | if (num_chunks == 0) |
| 1441 | { |
| 1442 | if (png_ptr->chunk_list != new_list) |
| 1443 | png_free(png_ptr, new_list); |
| 1444 | |
| 1445 | new_list = NULL; |
| 1446 | } |
| 1447 | } |
| 1448 | |
| 1449 | else |
| 1450 | num_chunks = 0; |
| 1451 | |
| 1452 | png_ptr->num_chunk_list = num_chunks; |
| 1453 | |
| 1454 | if (png_ptr->chunk_list != new_list) |
| 1455 | { |
| 1456 | if (png_ptr->chunk_list != NULL) |
| 1457 | png_free(png_ptr, png_ptr->chunk_list); |
| 1458 | |
| 1459 | png_ptr->chunk_list = new_list; |
| 1460 | } |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1461 | } |
| 1462 | #endif |
| 1463 | |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 1464 | #ifdef PNG_READ_USER_CHUNKS_SUPPORTED |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1465 | void PNGAPI |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1466 | png_set_read_user_chunk_fn(png_structrp png_ptr, png_voidp user_chunk_ptr, |
| 1467 | png_user_chunk_ptr read_user_chunk_fn) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1468 | { |
The Android Open Source Project | 4215dd1 | 2009-03-09 11:52:12 -0700 | [diff] [blame] | 1469 | png_debug(1, "in png_set_read_user_chunk_fn"); |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 1470 | |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1471 | if (png_ptr == NULL) |
| 1472 | return; |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 1473 | |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1474 | png_ptr->read_user_chunk_fn = read_user_chunk_fn; |
| 1475 | png_ptr->user_chunk_ptr = user_chunk_ptr; |
| 1476 | } |
| 1477 | #endif |
| 1478 | |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 1479 | #ifdef PNG_INFO_IMAGE_SUPPORTED |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1480 | void PNGAPI |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1481 | png_set_rows(png_const_structrp png_ptr, png_inforp info_ptr, |
| 1482 | png_bytepp row_pointers) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1483 | { |
The Android Open Source Project | 4215dd1 | 2009-03-09 11:52:12 -0700 | [diff] [blame] | 1484 | png_debug1(1, "in %s storage function", "rows"); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1485 | |
| 1486 | if (png_ptr == NULL || info_ptr == NULL) |
| 1487 | return; |
| 1488 | |
Matt Sarett | 96be908 | 2016-05-03 13:29:54 -0400 | [diff] [blame] | 1489 | if (info_ptr->row_pointers != NULL && |
| 1490 | (info_ptr->row_pointers != row_pointers)) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1491 | png_free_data(png_ptr, info_ptr, PNG_FREE_ROWS, 0); |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1492 | |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1493 | info_ptr->row_pointers = row_pointers; |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1494 | |
Matt Sarett | 96be908 | 2016-05-03 13:29:54 -0400 | [diff] [blame] | 1495 | if (row_pointers != NULL) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1496 | info_ptr->valid |= PNG_INFO_IDAT; |
| 1497 | } |
| 1498 | #endif |
| 1499 | |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1500 | void PNGAPI |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1501 | png_set_compression_buffer_size(png_structrp png_ptr, png_size_t size) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1502 | { |
| 1503 | if (png_ptr == NULL) |
| 1504 | return; |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1505 | |
| 1506 | if (size == 0 || size > PNG_UINT_31_MAX) |
| 1507 | png_error(png_ptr, "invalid compression buffer size"); |
| 1508 | |
| 1509 | # ifdef PNG_SEQUENTIAL_READ_SUPPORTED |
Matt Sarett | 96be908 | 2016-05-03 13:29:54 -0400 | [diff] [blame] | 1510 | if ((png_ptr->mode & PNG_IS_READ_STRUCT) != 0) |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1511 | { |
| 1512 | png_ptr->IDAT_read_size = (png_uint_32)size; /* checked above */ |
| 1513 | return; |
| 1514 | } |
| 1515 | # endif |
| 1516 | |
| 1517 | # ifdef PNG_WRITE_SUPPORTED |
Matt Sarett | 96be908 | 2016-05-03 13:29:54 -0400 | [diff] [blame] | 1518 | if ((png_ptr->mode & PNG_IS_READ_STRUCT) == 0) |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1519 | { |
| 1520 | if (png_ptr->zowner != 0) |
| 1521 | { |
| 1522 | png_warning(png_ptr, |
| 1523 | "Compression buffer size cannot be changed because it is in use"); |
Matt Sarett | 96be908 | 2016-05-03 13:29:54 -0400 | [diff] [blame] | 1524 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1525 | return; |
| 1526 | } |
| 1527 | |
Matt Sarett | 96be908 | 2016-05-03 13:29:54 -0400 | [diff] [blame] | 1528 | #ifndef __COVERITY__ |
| 1529 | /* Some compilers complain that this is always false. However, it |
| 1530 | * can be true when integer overflow happens. |
| 1531 | */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1532 | if (size > ZLIB_IO_MAX) |
| 1533 | { |
| 1534 | png_warning(png_ptr, |
| 1535 | "Compression buffer size limited to system maximum"); |
| 1536 | size = ZLIB_IO_MAX; /* must fit */ |
| 1537 | } |
Matt Sarett | 96be908 | 2016-05-03 13:29:54 -0400 | [diff] [blame] | 1538 | #endif |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1539 | |
Matt Sarett | 96be908 | 2016-05-03 13:29:54 -0400 | [diff] [blame] | 1540 | if (size < 6) |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1541 | { |
| 1542 | /* Deflate will potentially go into an infinite loop on a SYNC_FLUSH |
| 1543 | * if this is permitted. |
| 1544 | */ |
| 1545 | png_warning(png_ptr, |
| 1546 | "Compression buffer size cannot be reduced below 6"); |
Matt Sarett | 96be908 | 2016-05-03 13:29:54 -0400 | [diff] [blame] | 1547 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1548 | return; |
| 1549 | } |
| 1550 | |
| 1551 | if (png_ptr->zbuffer_size != size) |
| 1552 | { |
| 1553 | png_free_buffer_list(png_ptr, &png_ptr->zbuffer_list); |
| 1554 | png_ptr->zbuffer_size = (uInt)size; |
| 1555 | } |
| 1556 | } |
| 1557 | # endif |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1558 | } |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1559 | |
| 1560 | void PNGAPI |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1561 | png_set_invalid(png_const_structrp png_ptr, png_inforp info_ptr, int mask) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1562 | { |
Matt Sarett | 96be908 | 2016-05-03 13:29:54 -0400 | [diff] [blame] | 1563 | if (png_ptr != NULL && info_ptr != NULL) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1564 | info_ptr->valid &= ~mask; |
| 1565 | } |
| 1566 | |
| 1567 | |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1568 | #ifdef PNG_SET_USER_LIMITS_SUPPORTED |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame] | 1569 | /* This function was added to libpng 1.2.6 */ |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1570 | void PNGAPI |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1571 | png_set_user_limits (png_structrp png_ptr, png_uint_32 user_width_max, |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1572 | png_uint_32 user_height_max) |
| 1573 | { |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame] | 1574 | /* Images with dimensions larger than these limits will be |
| 1575 | * rejected by png_set_IHDR(). To accept any PNG datastream |
Matt Sarett | 96be908 | 2016-05-03 13:29:54 -0400 | [diff] [blame] | 1576 | * regardless of dimensions, set both limits to 0x7fffffff. |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame] | 1577 | */ |
| 1578 | if (png_ptr == NULL) |
| 1579 | return; |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1580 | |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame] | 1581 | png_ptr->user_width_max = user_width_max; |
| 1582 | png_ptr->user_height_max = user_height_max; |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1583 | } |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1584 | |
| 1585 | /* This function was added to libpng 1.4.0 */ |
| 1586 | void PNGAPI |
| 1587 | png_set_chunk_cache_max (png_structrp png_ptr, png_uint_32 user_chunk_cache_max) |
| 1588 | { |
Matt Sarett | 96be908 | 2016-05-03 13:29:54 -0400 | [diff] [blame] | 1589 | if (png_ptr != NULL) |
| 1590 | png_ptr->user_chunk_cache_max = user_chunk_cache_max; |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1591 | } |
| 1592 | |
| 1593 | /* This function was added to libpng 1.4.1 */ |
| 1594 | void PNGAPI |
| 1595 | png_set_chunk_malloc_max (png_structrp png_ptr, |
| 1596 | png_alloc_size_t user_chunk_malloc_max) |
| 1597 | { |
Matt Sarett | 96be908 | 2016-05-03 13:29:54 -0400 | [diff] [blame] | 1598 | if (png_ptr != NULL) |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1599 | png_ptr->user_chunk_malloc_max = user_chunk_malloc_max; |
| 1600 | } |
Matt Sarett | 96be908 | 2016-05-03 13:29:54 -0400 | [diff] [blame] | 1601 | #endif /* ?SET_USER_LIMITS */ |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1602 | |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 1603 | |
| 1604 | #ifdef PNG_BENIGN_ERRORS_SUPPORTED |
| 1605 | void PNGAPI |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1606 | png_set_benign_errors(png_structrp png_ptr, int allowed) |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 1607 | { |
| 1608 | png_debug(1, "in png_set_benign_errors"); |
| 1609 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1610 | /* If allowed is 1, png_benign_error() is treated as a warning. |
| 1611 | * |
| 1612 | * If allowed is 0, png_benign_error() is treated as an error (which |
| 1613 | * is the default behavior if png_set_benign_errors() is not called). |
| 1614 | */ |
| 1615 | |
Matt Sarett | 96be908 | 2016-05-03 13:29:54 -0400 | [diff] [blame] | 1616 | if (allowed != 0) |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1617 | png_ptr->flags |= PNG_FLAG_BENIGN_ERRORS_WARN | |
| 1618 | PNG_FLAG_APP_WARNINGS_WARN | PNG_FLAG_APP_ERRORS_WARN; |
| 1619 | |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 1620 | else |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1621 | png_ptr->flags &= ~(PNG_FLAG_BENIGN_ERRORS_WARN | |
| 1622 | PNG_FLAG_APP_WARNINGS_WARN | PNG_FLAG_APP_ERRORS_WARN); |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 1623 | } |
Matt Sarett | 96be908 | 2016-05-03 13:29:54 -0400 | [diff] [blame] | 1624 | #endif /* BENIGN_ERRORS */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1625 | |
| 1626 | #ifdef PNG_CHECK_FOR_INVALID_INDEX_SUPPORTED |
| 1627 | /* Whether to report invalid palette index; added at libng-1.5.10. |
| 1628 | * It is possible for an indexed (color-type==3) PNG file to contain |
| 1629 | * pixels with invalid (out-of-range) indexes if the PLTE chunk has |
| 1630 | * fewer entries than the image's bit-depth would allow. We recover |
Matt Sarett | 96be908 | 2016-05-03 13:29:54 -0400 | [diff] [blame] | 1631 | * from this gracefully by filling any incomplete palette with zeros |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1632 | * (opaque black). By default, when this occurs libpng will issue |
| 1633 | * a benign error. This API can be used to override that behavior. |
| 1634 | */ |
| 1635 | void PNGAPI |
| 1636 | png_set_check_for_invalid_index(png_structrp png_ptr, int allowed) |
| 1637 | { |
| 1638 | png_debug(1, "in png_set_check_for_invalid_index"); |
| 1639 | |
| 1640 | if (allowed > 0) |
| 1641 | png_ptr->num_palette_max = 0; |
| 1642 | |
| 1643 | else |
| 1644 | png_ptr->num_palette_max = -1; |
| 1645 | } |
| 1646 | #endif |
Matt Sarett | 96be908 | 2016-05-03 13:29:54 -0400 | [diff] [blame] | 1647 | #endif /* READ || WRITE */ |