makepng.c revision 114668651129dc978b9710d0f0ad107ee5ee3281
19b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett/* makepng.c */ 29b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett#define _ISOC99_SOURCE 39b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett/* Copyright: */ 49b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett#define COPYRIGHT "\251 2013,2015 John Cunningham Bowler" 59b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett/* 6114668651129dc978b9710d0f0ad107ee5ee3281Matt Sarett * Last changed in libpng 1.6.20 [November 24, 2015] 7ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * 8ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * This code is released under the libpng license. 9ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * For conditions of distribution and use, see the disclaimer 10ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * and license in png.h 11ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * 12ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * Make a test PNG image. The arguments are as follows: 13ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * 149b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * makepng [--sRGB|--linear|--1.8] [--tRNS] [--nofilters] \ 159b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * color-type bit-depth [file-name] 16ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * 17ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * The color-type may be numeric (and must match the numbers used by the PNG 18ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * specification) or one of the format names listed below. The bit-depth is the 19ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * component bit depth, or the pixel bit-depth for a color-mapped image. 20ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * 21ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * Without any options no color-space information is written, with the options 22ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * an sRGB or the appropriate gAMA chunk is written. "1.8" refers to the 23ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * display system used on older Apple computers to correct for high ambient 24ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * light levels in the viewing environment; it applies a transform of 25ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * approximately value^(1/1.45) to the color values and so a gAMA chunk of 65909 26ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * is written (1.45/2.2). 27ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * 28ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * The image data is generated internally. Unless --color is given the images 29ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * used are as follows: 30ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * 31ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * 1 channel: a square image with a diamond, the least luminous colors are on 32ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * the edge of the image, the most luminous in the center. 33ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * 34ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * 2 channels: the color channel increases in luminosity from top to bottom, the 35ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * alpha channel increases in opacity from left to right. 36ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * 37ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * 3 channels: linear combinations of, from the top-left corner clockwise, 38ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * black, green, white, red. 39ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * 40ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * 4 channels: linear combinations of, from the top-left corner clockwise, 41ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * transparent, red, green, blue. 42ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * 439b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * For color-mapped images a four channel color-map is used and if --tRNS is 449b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * given the PNG file has a tRNS chunk, as follows: 45ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * 46ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * 1-bit: entry 0 is transparent-red, entry 1 is opaque-white 47ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * 2-bit: entry 0: transparent-green 48ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * entry 1: 40%-red 49ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * entry 2: 80%-blue 50ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * entry 3: opaque-white 51ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * 4-bit: the 16 combinations of the 2-bit case 52ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * 8-bit: the 256 combinations of the 4-bit case 53ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * 54ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * The palette always has 2^bit-depth entries and the tRNS chunk one fewer. The 55ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * image is the 1-channel diamond, but using palette index, not luminosity. 56ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * 579b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * For formats other than color-mapped ones if --tRNS is specified a tRNS chunk 589b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * is generated with all channels equal to the low bits of 0x0101. 599b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * 60ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * Image size is determined by the final pixel depth in bits, i.e. channels x 61ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * bit-depth, as follows: 62ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * 63ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * 8 bits or less: 64x64 64ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * 16 bits: 256x256 65ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * More than 16 bits: 1024x1024 66ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * 679b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * Row filtering is the libpng default but may be turned off (the 'none' filter 689b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * is used on every row) with the --nofilters option. 69ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * 709b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * The images are not interlaced. 71ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * 72ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * If file-name is given then the PNG is written to that file, else it is 73ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * written to stdout. Notice that stdout is not supported on systems where, by 74ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * default, it assumes text output; this program makes no attempt to change the 75ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * text mode of stdout! 769b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * 779b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * makepng --color=<color> ... 789b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * 799b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * If --color is given then the whole image has that color, color-mapped images 809b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * will have exactly one palette entry and all image files with be 16x16 in 819b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * size. The color value is 1 to 4 decimal numbers as appropriate for the color 829b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * type. 839b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * 849b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * makepng --small ... 859b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * 869b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * If --small is given the images are no larger than required to include every 879b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * possible pixel value for the format. 889b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * 899b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * For formats with pixels 8 bits or fewer in size the images consist of a 909b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * single row with 2^pixel-depth pixels, one of every possible value. 919b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * 929b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * For formats with 16-bit pixels a 256x256 image is generated containing every 939b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * possible pixel value. 949b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * 959b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * For larger pixel sizes a 256x256 image is generated where the first row 969b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * consists of each pixel that has identical byte values throughout the pixel 979b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * followed by rows where the byte values differ within the pixel. 989b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * 999b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * In all cases the pixel values are arranged in such a way that the SUB and UP 1009b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * filters give byte sequences for maximal zlib compression. By default (if 1019b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * --nofilters is not given) the SUB filter is used on the first row and the UP 1029b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * filter on all following rows. 1039b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * 1049b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * The --small option is meant to provide good test-case coverage, however the 1059b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * images are not easy to examine visually. Without the --small option the 1069b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * images contain identical color values; the pixel values are adjusted 1079b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * according to the gamma encoding with no gamma encoding being interpreted as 1089b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * sRGB. 1099b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * 1109b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * LICENSING 1119b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * ========= 1129b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * 1139b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * This code is copyright of the authors, see the COPYRIGHT define above. The 1149b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * code is licensed as above, using the libpng license. The code generates 1159b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * images which are solely the product of the code; the options choose which of 1169b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * the many possibilities to generate. The images that result (but not the code 1179b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * which generates them) are licensed as defined here: 1189b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * 1199b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * IMPORTANT: the COPYRIGHT #define must contain ISO-Latin-1 characters, the 1209b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * IMAGE_LICENSING #define must contain UTF-8 characters. The 'copyright' 1219b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * symbol 0xA9U (\251) in ISO-Latin-1 encoding and 0xC20xA9 (\302\251) in UTF-8. 122ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik */ 1239b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett#define IMAGE_LICENSING "Dedicated to the public domain per Creative Commons "\ 1249b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett "license \"CC0 1.0\"; https://creativecommons.org/publicdomain/zero/1.0/" 125ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 126ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik#include <stddef.h> /* for offsetof */ 127ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik#include <stdlib.h> 128ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik#include <stdio.h> 129ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik#include <string.h> 130ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik#include <ctype.h> 131ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik#include <math.h> 132ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik#include <errno.h> 1339b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett#include <assert.h> 1349b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett#include <stdint.h> 135ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 136ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik#if defined(HAVE_CONFIG_H) && !defined(PNG_NO_CONFIG_H) 137ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik# include <config.h> 138ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik#endif 139ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 140ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik/* Define the following to use this test against your installed libpng, rather 141ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * than the one being built here: 142ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik */ 143ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik#ifdef PNG_FREESTANDING_TESTS 144ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik# include <png.h> 145ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik#else 146ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik# include "../../png.h" 147ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik#endif 148ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1499b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett#include <zlib.h> 1509b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett 1519b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett/* Work round for GCC complaints about casting a (double) function result to 1529b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * an unsigned: 1539b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett */ 1549b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarettstatic unsigned int 1559b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarettflooru(double d) 1569b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett{ 1579b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett d = floor(d); 1589b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett return (unsigned int)d; 1599b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett} 1609b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett 1619b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarettstatic png_byte 1629b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarettfloorb(double d) 1639b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett{ 1649b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett d = floor(d); 1659b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett return (png_byte)d; 1669b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett} 1679b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett 168ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik/* This structure is used for inserting extra chunks (the --insert argument, not 169ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * documented above.) 170ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik */ 171ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craiktypedef struct chunk_insert 172ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik{ 173ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik struct chunk_insert *next; 174ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik void (*insert)(png_structp, png_infop, int, png_charpp); 175ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik int nparams; 176ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik png_charp parameters[1]; 177ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik} chunk_insert; 178ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1799b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarettstatic unsigned int 180ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craikchannels_of_type(int color_type) 181ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik{ 182ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik if (color_type & PNG_COLOR_MASK_PALETTE) 183ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik return 1; 184ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 185ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik else 186ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 187ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik int channels = 1; 188ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 189ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik if (color_type & PNG_COLOR_MASK_COLOR) 190ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik channels = 3; 191ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 192ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik if (color_type & PNG_COLOR_MASK_ALPHA) 193ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik return channels + 1; 194ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 195ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik else 196ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik return channels; 197ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 198ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik} 199ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 2009b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarettstatic unsigned int 201ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craikpixel_depth_of_type(int color_type, int bit_depth) 202ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik{ 203ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik return channels_of_type(color_type) * bit_depth; 204ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik} 205ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 206ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craikstatic unsigned int 2079b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarettimage_size_of_type(int color_type, int bit_depth, unsigned int *colors, 2089b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett int small) 209ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik{ 210ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik if (*colors) 211ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik return 16; 212ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 213ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik else 214ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 215ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik int pixel_depth = pixel_depth_of_type(color_type, bit_depth); 216ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 2179b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett if (small) 2189b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett { 2199b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett if (pixel_depth <= 8) /* there will be one row */ 2209b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett return 1 << pixel_depth; 2219b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett 2229b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett else 2239b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett return 256; 2249b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett } 2259b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett 2269b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett else if (pixel_depth < 8) 227ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik return 64; 228ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 229ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik else if (pixel_depth > 16) 230ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik return 1024; 231ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 232ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik else 233ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik return 256; 234ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 235ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik} 236ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 237ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craikstatic void 238ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craikset_color(png_colorp color, png_bytep trans, unsigned int red, 239ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik unsigned int green, unsigned int blue, unsigned int alpha, 240ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik png_const_bytep gamma_table) 241ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik{ 242ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik color->red = gamma_table[red]; 243ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik color->green = gamma_table[green]; 244ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik color->blue = gamma_table[blue]; 245ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik *trans = (png_byte)alpha; 246ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik} 247ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 248ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craikstatic int 249ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craikgenerate_palette(png_colorp palette, png_bytep trans, int bit_depth, 250ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik png_const_bytep gamma_table, unsigned int *colors) 251ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik{ 252ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik /* 253ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * 1-bit: entry 0 is transparent-red, entry 1 is opaque-white 254ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * 2-bit: entry 0: transparent-green 255ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * entry 1: 40%-red 256ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * entry 2: 80%-blue 257ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * entry 3: opaque-white 258ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * 4-bit: the 16 combinations of the 2-bit case 259ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * 8-bit: the 256 combinations of the 4-bit case 260ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik */ 261ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik switch (colors[0]) 262ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 263ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik default: 264ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik fprintf(stderr, "makepng: --colors=...: invalid count %u\n", 265ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik colors[0]); 266ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik exit(1); 267ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 268ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik case 1: 269ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik set_color(palette+0, trans+0, colors[1], colors[1], colors[1], 255, 270ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik gamma_table); 271ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik return 1; 272ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 273ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik case 2: 274ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik set_color(palette+0, trans+0, colors[1], colors[1], colors[1], 275ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik colors[2], gamma_table); 276ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik return 1; 277ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 278ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik case 3: 279ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik set_color(palette+0, trans+0, colors[1], colors[2], colors[3], 255, 280ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik gamma_table); 281ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik return 1; 282ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 283ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik case 4: 284ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik set_color(palette+0, trans+0, colors[1], colors[2], colors[3], 285ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik colors[4], gamma_table); 286ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik return 1; 287ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 288ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik case 0: 289ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik if (bit_depth == 1) 290ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 291ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik set_color(palette+0, trans+0, 255, 0, 0, 0, gamma_table); 292ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik set_color(palette+1, trans+1, 255, 255, 255, 255, gamma_table); 293ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik return 2; 294ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 295ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 296ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik else 297ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 298ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik unsigned int size = 1U << (bit_depth/2); /* 2, 4 or 16 */ 2999b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett unsigned int x, y; 3009b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett volatile unsigned int ip = 0; 301ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 302ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik for (x=0; x<size; ++x) for (y=0; y<size; ++y) 303ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 304ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik ip = x + (size * y); 305ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 306ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik /* size is at most 16, so the scaled value below fits in 16 bits 307ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik */ 308ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik# define interp(pos, c1, c2) ((pos * c1) + ((size-pos) * c2)) 309ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik# define xyinterp(x, y, c1, c2, c3, c4) (((size * size / 2) +\ 310ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik (interp(x, c1, c2) * y + (size-y) * interp(x, c3, c4))) /\ 311ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik (size*size)) 312ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 313ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik set_color(palette+ip, trans+ip, 314ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik /* color: green, red,blue,white */ 315ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik xyinterp(x, y, 0, 255, 0, 255), 316ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik xyinterp(x, y, 255, 0, 0, 255), 317ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik xyinterp(x, y, 0, 0, 255, 255), 318ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik /* alpha: 0, 102, 204, 255) */ 319ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik xyinterp(x, y, 0, 102, 204, 255), 320ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik gamma_table); 321ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 322ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 323ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik return ip+1; 324ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 325ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 326ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik} 327ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 328ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craikstatic void 329ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craikset_value(png_bytep row, size_t rowbytes, png_uint_32 x, unsigned int bit_depth, 330ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik png_uint_32 value, png_const_bytep gamma_table, double conv) 331ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik{ 332ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik unsigned int mask = (1U << bit_depth)-1; 333ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 334ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik x *= bit_depth; /* Maximum x is 4*1024, maximum bit_depth is 16 */ 335ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 336ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik if (value <= mask) 337ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 338ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik png_uint_32 offset = x >> 3; 339ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 340ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik if (offset < rowbytes && (bit_depth < 16 || offset+1 < rowbytes)) 341ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 342ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik row += offset; 343ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 344ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik switch (bit_depth) 345ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 346ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik case 1: 347ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik case 2: 348ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik case 4: 349ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik /* Don't gamma correct - values get smashed */ 350ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 351ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik unsigned int shift = (8 - bit_depth) - (x & 0x7U); 352ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 353ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik mask <<= shift; 354ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik value = (value << shift) & mask; 355ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik *row = (png_byte)((*row & ~mask) | value); 356ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 357ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik return; 358ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 359ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik default: 360ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik fprintf(stderr, "makepng: bad bit depth (internal error)\n"); 361ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik exit(1); 362ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 363ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik case 16: 3649b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett value = flooru(65535*pow(value/65535.,conv)+.5); 365ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik *row++ = (png_byte)(value >> 8); 366ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik *row = (png_byte)value; 367ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik return; 368ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 369ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik case 8: 370ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik *row = gamma_table[value]; 371ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik return; 372ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 373ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 374ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 375ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik else 376ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 377ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik fprintf(stderr, "makepng: row buffer overflow (internal error)\n"); 378ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik exit(1); 379ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 380ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 381ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 382ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik else 383ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 384ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik fprintf(stderr, "makepng: component overflow (internal error)\n"); 385ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik exit(1); 386ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 387ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik} 388ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 3899b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarettstatic int /* filter mask for row */ 390ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craikgenerate_row(png_bytep row, size_t rowbytes, unsigned int y, int color_type, 391ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik int bit_depth, png_const_bytep gamma_table, double conv, 3929b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett unsigned int *colors, int small) 393ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik{ 3949b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett int filters = 0; /* file *MASK*, 0 means the default, not NONE */ 39506f1087a94f1e48298e89d77ccc51a0ced871958Matt Sarett png_uint_32 size_max = 3969b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett image_size_of_type(color_type, bit_depth, colors, small)-1; 397ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik png_uint_32 depth_max = (1U << bit_depth)-1; /* up to 65536 */ 398ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 3999b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett if (colors[0] == 0) if (small) 4009b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett { 4019b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett unsigned int pixel_depth = pixel_depth_of_type(color_type, bit_depth); 4029b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett 4039b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett /* For pixel depths less than 16 generate a single row containing all the 4049b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * possible pixel values. For 16 generate all 65536 byte pair 4059b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * combinations in a 256x256 pixel array. 4069b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett */ 4079b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett switch (pixel_depth) 4089b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett { 4099b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett case 1: 4109b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett assert(y == 0 && rowbytes == 1 && size_max == 1); 4119b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett row[0] = 0x6CU; /* binary: 01101100, only top 2 bits used */ 4129b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett filters = PNG_FILTER_NONE; 4139b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett break; 4149b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett 4159b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett case 2: 4169b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett assert(y == 0 && rowbytes == 1 && size_max == 3); 4179b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett row[0] = 0x1BU; /* binary 00011011, all bits used */ 4189b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett filters = PNG_FILTER_NONE; 4199b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett break; 4209b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett 4219b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett case 4: 4229b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett assert(y == 0 && rowbytes == 8 && size_max == 15); 4239b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett row[0] = 0x01U; 4249b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett row[1] = 0x23U; /* SUB gives 0x22U for all following bytes */ 4259b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett row[2] = 0x45U; 4269b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett row[3] = 0x67U; 4279b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett row[4] = 0x89U; 4289b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett row[5] = 0xABU; 4299b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett row[6] = 0xCDU; 4309b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett row[7] = 0xEFU; 4319b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett filters = PNG_FILTER_SUB; 4329b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett break; 4339b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett 4349b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett case 8: 4359b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett /* The row will have all the pixel values in order starting with 4369b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * '1', the SUB filter will change every byte into '1' (including 4379b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * the last, which generates pixel value '0'). Since the SUB filter 4389b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * has value 1 this should result in maximum compression. 4399b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett */ 4409b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett assert(y == 0 && rowbytes == 256 && size_max == 255); 4419b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett for (;;) 4429b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett { 4439b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett row[size_max] = 0xFFU & (size_max+1); 4449b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett if (size_max == 0) 4459b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett break; 4469b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett --size_max; 4479b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett } 4489b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett filters = PNG_FILTER_SUB; 4499b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett break; 4509b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett 4519b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett case 16: 4529b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett /* Rows are generated such that each row has a constant difference 4539b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * between the first and second byte of each pixel and so that the 4549b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * difference increases by 1 at each row. The rows start with the 4559b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * first byte value of 0 and the value increases to 255 across the 4569b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * row. 4579b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * 4589b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * The difference starts at 1, so the first row is: 4599b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * 4609b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * 0 1 1 2 2 3 3 4 ... 254 255 255 0 4619b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * 4629b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * This means that running the SUB filter on the first row produces: 4639b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * 4649b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * [SUB==1] 0 1 0 1 0 1... 4659b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * 4669b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * Then the difference is 2 on the next row, giving: 4679b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * 4689b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * 0 2 1 3 2 4 3 5 ... 254 0 255 1 4699b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * 4709b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * When the UP filter is run on this libpng produces: 4719b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * 4729b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * [UP ==2] 0 1 0 1 0 1... 4739b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * 4749b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * And so on for all the remain rows to the final two * rows: 4759b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * 4769b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * row 254: 0 255 1 0 2 1 3 2 4 3 ... 254 253 255 254 4779b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * row 255: 0 0 1 1 2 2 3 3 4 4 ... 254 254 255 255 4789b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett */ 4799b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett assert(rowbytes == 512 && size_max == 255); 4809b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett for (;;) 4819b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett { 4829b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett row[2*size_max ] = 0xFFU & size_max; 4839b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett row[2*size_max+1] = 0xFFU & (size_max+y+1); 4849b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett if (size_max == 0) 4859b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett break; 4869b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett --size_max; 4879b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett } 4889b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett /* The first row must include PNG_FILTER_UP so that libpng knows we 4899b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * need to keep it for the following row: 4909b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett */ 4919b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett filters = (y == 0 ? PNG_FILTER_SUB+PNG_FILTER_UP : PNG_FILTER_UP); 4929b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett break; 4939b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett 4949b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett case 24: 4959b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett case 32: 4969b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett case 48: 4979b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett case 64: 4989b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett /* The rows are filled by an alogorithm similar to the above, in the 4999b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * first row pixel bytes are all equal, increasing from 0 by 1 for 5009b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * each pixel. In the second row the bytes within a pixel are 5019b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * incremented 1,3,5,7,... from the previous row byte. Using an odd 5029b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * number ensures all the possible byte values are used. 5039b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett */ 5049b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett assert(size_max == 255 && rowbytes == 256*(pixel_depth>>3)); 5059b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett pixel_depth >>= 3; /* now in bytes */ 5069b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett while (rowbytes > 0) 5079b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett { 5089b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett const size_t pixel_index = --rowbytes/pixel_depth; 5099b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett 5109b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett if (y == 0) 5119b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett row[rowbytes] = 0xFFU & pixel_index; 5129b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett 5139b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett else 5149b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett { 5159b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett const size_t byte_offset = 5169b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett rowbytes - pixel_index * pixel_depth; 5179b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett 5189b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett row[rowbytes] = 5199b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett 0xFFU & (pixel_index + (byte_offset * 2*y) + 1); 5209b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett } 5219b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett } 5229b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett filters = (y == 0 ? PNG_FILTER_SUB+PNG_FILTER_UP : PNG_FILTER_UP); 5239b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett break; 5249b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett 5259b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett default: 5269b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett assert(0/*NOT REACHED*/); 5279b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett } 5289b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett } 52906f1087a94f1e48298e89d77ccc51a0ced871958Matt Sarett 5309b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett else switch (channels_of_type(color_type)) 531ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 532ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik /* 1 channel: a square image with a diamond, the least luminous colors are on 533ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * the edge of the image, the most luminous in the center. 534ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik */ 535ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik case 1: 536ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 537ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik png_uint_32 x; 538ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik png_uint_32 base = 2*size_max - abs(2*y-size_max); 539ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 540ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik for (x=0; x<=size_max; ++x) 541ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 542ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik png_uint_32 luma = base - abs(2*x-size_max); 543ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 544ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik /* 'luma' is now in the range 0..2*size_max, we need 545ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * 0..depth_max 546ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik */ 547ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik luma = (luma*depth_max + size_max) / (2*size_max); 548ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik set_value(row, rowbytes, x, bit_depth, luma, gamma_table, conv); 549ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 550ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 551ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik break; 552ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 553ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik /* 2 channels: the color channel increases in luminosity from top to bottom, 554ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * the alpha channel increases in opacity from left to right. 555ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik */ 556ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik case 2: 557ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 558ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik png_uint_32 alpha = (depth_max * y * 2 + size_max) / (2 * size_max); 559ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik png_uint_32 x; 560ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 561ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik for (x=0; x<=size_max; ++x) 562ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 563ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik set_value(row, rowbytes, 2*x, bit_depth, 564ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik (depth_max * x * 2 + size_max) / (2 * size_max), gamma_table, 565ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik conv); 566ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik set_value(row, rowbytes, 2*x+1, bit_depth, alpha, gamma_table, 567ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik conv); 568ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 569ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 570ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik break; 571ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 572ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik /* 3 channels: linear combinations of, from the top-left corner clockwise, 573ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * black, green, white, red. 574ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik */ 575ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik case 3: 576ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 577ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik /* x0: the black->red scale (the value of the red component) at the 578ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * start of the row (blue and green are 0). 579ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * x1: the green->white scale (the value of the red and blue 580ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * components at the end of the row; green is depth_max). 581ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik */ 582ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik png_uint_32 Y = (depth_max * y * 2 + size_max) / (2 * size_max); 583ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik png_uint_32 x; 584ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 585ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik /* Interpolate x/depth_max from start to end: 586ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * 587ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * start end difference 588ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * red: Y Y 0 589ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * green: 0 depth_max depth_max 590ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * blue: 0 Y Y 591ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik */ 592ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik for (x=0; x<=size_max; ++x) 593ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 594ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik set_value(row, rowbytes, 3*x+0, bit_depth, /* red */ Y, 595ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik gamma_table, conv); 596ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik set_value(row, rowbytes, 3*x+1, bit_depth, /* green */ 597ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik (depth_max * x * 2 + size_max) / (2 * size_max), 598ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik gamma_table, conv); 599ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik set_value(row, rowbytes, 3*x+2, bit_depth, /* blue */ 600ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik (Y * x * 2 + size_max) / (2 * size_max), 601ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik gamma_table, conv); 602ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 603ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 604ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik break; 605ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 606ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik /* 4 channels: linear combinations of, from the top-left corner clockwise, 607ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * transparent, red, green, blue. 608ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik */ 609ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik case 4: 610ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 611ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik /* x0: the transparent->blue scale (the value of the blue and alpha 612ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * components) at the start of the row (red and green are 0). 613ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * x1: the red->green scale (the value of the red and green 614ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * components at the end of the row; blue is 0 and alpha is 615ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * depth_max). 616ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik */ 617ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik png_uint_32 Y = (depth_max * y * 2 + size_max) / (2 * size_max); 618ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik png_uint_32 x; 619ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 620ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik /* Interpolate x/depth_max from start to end: 621ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * 622ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * start end difference 623ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * red: 0 depth_max-Y depth_max-Y 624ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * green: 0 Y Y 625ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * blue: Y 0 -Y 626ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * alpha: Y depth_max depth_max-Y 627ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik */ 628ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik for (x=0; x<=size_max; ++x) 629ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 630ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik set_value(row, rowbytes, 4*x+0, bit_depth, /* red */ 631ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik ((depth_max-Y) * x * 2 + size_max) / (2 * size_max), 632ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik gamma_table, conv); 633ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik set_value(row, rowbytes, 4*x+1, bit_depth, /* green */ 634ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik (Y * x * 2 + size_max) / (2 * size_max), 635ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik gamma_table, conv); 636ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik set_value(row, rowbytes, 4*x+2, bit_depth, /* blue */ 637ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik Y - (Y * x * 2 + size_max) / (2 * size_max), 638ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik gamma_table, conv); 639ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik set_value(row, rowbytes, 4*x+3, bit_depth, /* alpha */ 640ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik Y + ((depth_max-Y) * x * 2 + size_max) / (2 * size_max), 641ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik gamma_table, conv); 642ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 643ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 644ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik break; 645ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 646ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik default: 647ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik fprintf(stderr, "makepng: internal bad channel count\n"); 648ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik exit(2); 649ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 650ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 651ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik else if (color_type & PNG_COLOR_MASK_PALETTE) 652ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 653ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik /* Palette with fixed color: the image rows are all 0 and the image width 654ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * is 16. 655ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik */ 656ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik memset(row, 0, rowbytes); 657ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 658ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 659ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik else if (colors[0] == channels_of_type(color_type)) 660ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik switch (channels_of_type(color_type)) 661ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 662ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik case 1: 663ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 664ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik const png_uint_32 luma = colors[1]; 665ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik png_uint_32 x; 666ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 667ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik for (x=0; x<=size_max; ++x) 668ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik set_value(row, rowbytes, x, bit_depth, luma, gamma_table, 669ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik conv); 670ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 671ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik break; 672ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 673ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik case 2: 674ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 675ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik const png_uint_32 luma = colors[1]; 676ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik const png_uint_32 alpha = colors[2]; 677ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik png_uint_32 x; 678ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 679ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik for (x=0; x<size_max; ++x) 680ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 681ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik set_value(row, rowbytes, 2*x, bit_depth, luma, gamma_table, 682ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik conv); 683ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik set_value(row, rowbytes, 2*x+1, bit_depth, alpha, gamma_table, 684ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik conv); 685ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 686ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 687ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik break; 688ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 689ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik case 3: 690ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 691ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik const png_uint_32 red = colors[1]; 692ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik const png_uint_32 green = colors[2]; 693ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik const png_uint_32 blue = colors[3]; 694ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik png_uint_32 x; 695ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 696ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik for (x=0; x<=size_max; ++x) 697ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 698ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik set_value(row, rowbytes, 3*x+0, bit_depth, red, gamma_table, 699ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik conv); 700ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik set_value(row, rowbytes, 3*x+1, bit_depth, green, gamma_table, 701ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik conv); 702ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik set_value(row, rowbytes, 3*x+2, bit_depth, blue, gamma_table, 703ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik conv); 704ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 705ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 706ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik break; 707ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 708ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik case 4: 709ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 710ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik const png_uint_32 red = colors[1]; 711ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik const png_uint_32 green = colors[2]; 712ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik const png_uint_32 blue = colors[3]; 713ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik const png_uint_32 alpha = colors[4]; 714ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik png_uint_32 x; 715ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 716ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik for (x=0; x<=size_max; ++x) 717ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 718ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik set_value(row, rowbytes, 4*x+0, bit_depth, red, gamma_table, 719ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik conv); 720ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik set_value(row, rowbytes, 4*x+1, bit_depth, green, gamma_table, 721ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik conv); 722ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik set_value(row, rowbytes, 4*x+2, bit_depth, blue, gamma_table, 723ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik conv); 724ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik set_value(row, rowbytes, 4*x+3, bit_depth, alpha, gamma_table, 725ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik conv); 726ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 727ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 728ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik break; 729ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 730ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik default: 731ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik fprintf(stderr, "makepng: internal bad channel count\n"); 732ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik exit(2); 733ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 734ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 735ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik else 736ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 737ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik fprintf(stderr, 738ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik "makepng: --color: count(%u) does not match channels(%u)\n", 739ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik colors[0], channels_of_type(color_type)); 740ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik exit(1); 741ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 7429b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett 7439b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett return filters; 744ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik} 745ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 746ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 747ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craikstatic void PNGCBAPI 748ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craikmakepng_warning(png_structp png_ptr, png_const_charp message) 749ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik{ 750ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik const char **ep = png_get_error_ptr(png_ptr); 751ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik const char *name; 752ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 753ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik if (ep != NULL && *ep != NULL) 754ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik name = *ep; 755ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 756ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik else 757ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik name = "makepng"; 758ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 759ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik fprintf(stderr, "%s: warning: %s\n", name, message); 760ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik} 761ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 762ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craikstatic void PNGCBAPI 763ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craikmakepng_error(png_structp png_ptr, png_const_charp message) 764ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik{ 765ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik makepng_warning(png_ptr, message); 766ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik png_longjmp(png_ptr, 1); 767ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik} 768ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 769ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craikstatic int /* 0 on success, else an error code */ 770ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craikwrite_png(const char **name, FILE *fp, int color_type, int bit_depth, 771ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik volatile png_fixed_point gamma, chunk_insert * volatile insert, 7729b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett unsigned int filters, unsigned int *colors, int small, int tRNS) 773ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik{ 774ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik png_structp png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, 775ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik name, makepng_error, makepng_warning); 776ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik volatile png_infop info_ptr = NULL; 777ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik volatile png_bytep row = NULL; 778ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 779ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik if (png_ptr == NULL) 780ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 781ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik fprintf(stderr, "makepng: OOM allocating write structure\n"); 782ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik return 1; 783ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 784ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 785ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik if (setjmp(png_jmpbuf(png_ptr))) 786ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 787ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik png_structp nv_ptr = png_ptr; 788ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik png_infop nv_info = info_ptr; 789ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 790ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik png_ptr = NULL; 791ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik info_ptr = NULL; 792ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik png_destroy_write_struct(&nv_ptr, &nv_info); 793ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik if (row != NULL) free(row); 794ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik return 1; 795ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 796ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 797ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik /* Allow benign errors so that we can write PNGs with errors */ 798ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik png_set_benign_errors(png_ptr, 1/*allowed*/); 7999b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett 8009b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett /* Max out the text compression level in an attempt to make the license 8019b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * small. If --small then do the same for the IDAT. 8029b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett */ 8039b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett if (small) 8049b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett png_set_compression_level(png_ptr, Z_BEST_COMPRESSION); 8059b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett 8069b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett png_set_text_compression_level(png_ptr, Z_BEST_COMPRESSION); 8079b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett 808ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik png_init_io(png_ptr, fp); 809ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 810ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik info_ptr = png_create_info_struct(png_ptr); 811ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik if (info_ptr == NULL) 812ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik png_error(png_ptr, "OOM allocating info structure"); 813ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 814ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 8159b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett const unsigned int size = 8169b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett image_size_of_type(color_type, bit_depth, colors, small); 8179b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett unsigned int ysize; 818ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik png_fixed_point real_gamma = 45455; /* For sRGB */ 819ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik png_byte gamma_table[256]; 820ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik double conv; 821ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 8229b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett /* Normally images are square, but with 'small' we want to simply generate 8239b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * all the pixel values, or all that we reasonably can: 8249b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett */ 8259b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett if (small) 8269b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett { 8279b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett const unsigned int pixel_depth = 8289b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett pixel_depth_of_type(color_type, bit_depth); 8299b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett 8309b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett if (pixel_depth <= 8U) 8319b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett { 8329b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett assert(size == (1U<<pixel_depth)); 8339b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett ysize = 1U; 8349b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett } 8359b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett 8369b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett else 8379b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett { 8389b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett assert(size == 256U); 8399b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett ysize = 256U; 8409b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett } 8419b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett } 8429b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett 8439b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett else 8449b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett ysize = size; 8459b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett 846ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik /* This function uses the libpng values used on read to carry extra 847ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * information about the gamma: 848ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik */ 849ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik if (gamma == PNG_GAMMA_MAC_18) 850ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik gamma = 65909; 851ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 852ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik else if (gamma > 0 && gamma < 1000) 853ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik gamma = PNG_FP_1; 854ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 855ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik if (gamma > 0) 856ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik real_gamma = gamma; 857ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 858ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 859ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik unsigned int i; 860ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 861ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik if (real_gamma == 45455) for (i=0; i<256; ++i) 862ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 863ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik gamma_table[i] = (png_byte)i; 864ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik conv = 1.; 865ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 866ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 867ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik else 868ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 869ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik /* Convert 'i' from sRGB (45455) to real_gamma, this makes 870ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * the images look the same regardless of the gAMA chunk. 871ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik */ 872ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik conv = real_gamma; 873ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik conv /= 45455; 874ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 875ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik gamma_table[0] = 0; 876ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 877ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik for (i=1; i<255; ++i) 8789b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett gamma_table[i] = floorb(pow(i/255.,conv) * 255 + .5); 879ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 880ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik gamma_table[255] = 255; 881ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 882ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 883ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 8849b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett png_set_IHDR(png_ptr, info_ptr, size, ysize, bit_depth, color_type, 885ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik PNG_INTERLACE_NONE, PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE); 886ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 887ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik if (color_type & PNG_COLOR_MASK_PALETTE) 888ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 889ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik int npalette; 890ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik png_color palette[256]; 891ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik png_byte trans[256]; 892ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 893ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik npalette = generate_palette(palette, trans, bit_depth, gamma_table, 894ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik colors); 895ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik png_set_PLTE(png_ptr, info_ptr, palette, npalette); 8969b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett 8979b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett if (tRNS) 8989b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett png_set_tRNS(png_ptr, info_ptr, trans, npalette-1, 8999b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett NULL/*transparent color*/); 900ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 901ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik /* Reset gamma_table to prevent the image rows being changed */ 902ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik for (npalette=0; npalette<256; ++npalette) 903ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik gamma_table[npalette] = (png_byte)npalette; 904ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 905ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 9069b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett else if (tRNS) 9079b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett { 9089b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett png_color_16 col; 9099b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett 9109b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett col.red = col.green = col.blue = col.gray = 9119b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett 0x0101U & ((1U<<bit_depth)-1U); 9129b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett col.index = 0U; 9139b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett png_set_tRNS(png_ptr, info_ptr, NULL/*trans*/, 1U, &col); 9149b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett } 9159b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett 916ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik if (gamma == PNG_DEFAULT_sRGB) 917ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik png_set_sRGB(png_ptr, info_ptr, PNG_sRGB_INTENT_ABSOLUTE); 918ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 919ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik else if (gamma > 0) /* Else don't set color space information */ 920ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 921ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik png_set_gAMA_fixed(png_ptr, info_ptr, real_gamma); 922ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 923ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik /* Just use the sRGB values here. */ 924ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik png_set_cHRM_fixed(png_ptr, info_ptr, 925ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik /* color x y */ 926ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik /* white */ 31270, 32900, 927ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik /* red */ 64000, 33000, 928ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik /* green */ 30000, 60000, 929ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik /* blue */ 15000, 6000 930ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik ); 931ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 932ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 933ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik /* Insert extra information. */ 934ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik while (insert != NULL) 935ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 936ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik insert->insert(png_ptr, info_ptr, insert->nparams, insert->parameters); 937ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik insert = insert->next; 938ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 939ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 940ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik /* Write the file header. */ 941ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik png_write_info(png_ptr, info_ptr); 942ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 943ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik /* Restrict the filters */ 944ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik png_set_filter(png_ptr, PNG_FILTER_TYPE_BASE, filters); 945ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 946ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 9479b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett# ifdef PNG_WRITE_INTERLACING_SUPPORTED 9489b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett int passes = png_set_interlace_handling(png_ptr); 9499b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett# else /* !WRITE_INTERLACING */ 9509b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett int passes = 1; 9519b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett# endif /* !WRITE_INTERLACING */ 952ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik int pass; 953ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik png_size_t rowbytes = png_get_rowbytes(png_ptr, info_ptr); 954ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 955ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik row = malloc(rowbytes); 956ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 957ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik if (row == NULL) 958ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik png_error(png_ptr, "OOM allocating row buffer"); 959ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 960ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik for (pass = 0; pass < passes; ++pass) 961ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 962ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik unsigned int y; 963ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 9649b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett for (y=0; y<ysize; ++y) 965ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 9669b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett unsigned int row_filters = 9679b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett generate_row(row, rowbytes, y, color_type, bit_depth, 9689b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett gamma_table, conv, colors, small); 9699b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett 9709b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett if (row_filters != 0 && filters == PNG_ALL_FILTERS) 9719b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett png_set_filter(png_ptr, PNG_FILTER_TYPE_BASE, row_filters); 9729b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett 973ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik png_write_row(png_ptr, row); 974ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 975ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 976ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 977ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 978ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 979ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik /* Finish writing the file. */ 980ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik png_write_end(png_ptr, info_ptr); 981ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 982ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 983ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik png_structp nv_ptr = png_ptr; 984ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik png_infop nv_info = info_ptr; 985ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 986ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik png_ptr = NULL; 987ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik info_ptr = NULL; 988ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik png_destroy_write_struct(&nv_ptr, &nv_info); 989ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 990ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik free(row); 991ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik return 0; 992ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik} 993ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 994ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 995ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craikstatic size_t 996ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craikload_file(png_const_charp name, png_bytepp result) 997ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik{ 998ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik FILE *fp = tmpfile(); 999ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1000ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik if (fp != NULL) 1001ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 1002ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik FILE *ip = fopen(name, "rb"); 1003ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1004ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik if (ip != NULL) 1005ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 1006ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik size_t total = 0; 1007ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik int ch; 1008ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1009ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik for (;;) 1010ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 1011ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik ch = getc(ip); 1012ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik if (ch == EOF) break; 1013ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik putc(ch, fp); 1014ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik ++total; 1015ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 1016ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1017ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik if (ferror(ip)) 1018ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 1019ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik perror(name); 1020ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik fprintf(stderr, "%s: read error\n", name); 1021ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik (void)fclose(ip); 1022ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 1023ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1024ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik else 1025ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 1026ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik (void)fclose(ip); 1027ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1028ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik if (ferror(fp)) 1029ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 1030ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik perror("temporary file"); 1031ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik fprintf(stderr, "temporary file write error\n"); 1032ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 1033ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1034ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik else 1035ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 1036ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik rewind(fp); 1037ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1038ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik if (total > 0) 1039ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 1040ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik /* Round up to a multiple of 4 here to allow an iCCP profile 1041ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * to be padded to a 4x boundary. 1042ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik */ 1043ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik png_bytep data = malloc((total+3)&~3); 1044ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1045ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik if (data != NULL) 1046ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 1047ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik size_t new_size = 0; 1048ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1049ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik for (;;) 1050ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 1051ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik ch = getc(fp); 1052ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik if (ch == EOF) break; 1053ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik data[new_size++] = (png_byte)ch; 1054ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 1055ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1056ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik if (ferror(fp) || new_size != total) 1057ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 1058ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik perror("temporary file"); 1059ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik fprintf(stderr, "temporary file read error\n"); 1060ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik free(data); 1061ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 1062ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1063ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik else 1064ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 1065ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik (void)fclose(fp); 1066ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik *result = data; 1067ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik return total; 1068ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 1069ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 1070ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1071ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik else 1072ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik fprintf(stderr, "%s: out of memory loading file\n", name); 1073ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 1074ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1075ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik else 1076ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik fprintf(stderr, "%s: empty file\n", name); 1077ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 1078ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 1079ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 1080ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1081ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik else 1082ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 1083ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik perror(name); 1084ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik fprintf(stderr, "%s: open failed\n", name); 1085ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 1086ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1087ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik fclose(fp); 1088ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 1089ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1090ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik else 1091ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik fprintf(stderr, "makepng: %s: could not open temporary file\n", name); 1092ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1093ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik exit(1); 1094ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik return 0; 1095ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik} 1096ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1097ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craikstatic png_size_t 1098ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craikload_fake(png_charp param, png_bytepp profile) 1099ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik{ 1100ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik char *endptr = NULL; 11019b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett uint64_t size = strtoull(param, &endptr, 0/*base*/); 1102ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1103ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik /* The 'fake' format is <number>*[string] */ 1104ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik if (endptr != NULL && *endptr == '*') 1105ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 1106ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik size_t len = strlen(++endptr); 1107ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik size_t result = (size_t)size; 1108ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1109ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik if (len == 0) len = 1; /* capture the terminating '\0' */ 1110ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1111ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik /* Now repeat that string to fill 'size' bytes. */ 1112ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik if (result == size && (*profile = malloc(result)) != NULL) 1113ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 1114ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik png_bytep out = *profile; 1115ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1116ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik if (len == 1) 1117ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik memset(out, *endptr, result); 1118ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1119ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik else 1120ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 1121ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik while (size >= len) 1122ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 1123ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik memcpy(out, endptr, len); 1124ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik out += len; 1125ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik size -= len; 1126ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 1127ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik memcpy(out, endptr, size); 1128ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 1129ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1130ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik return result; 1131ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 1132ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1133ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik else 1134ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 1135ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik fprintf(stderr, "%s: size exceeds system limits\n", param); 1136ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik exit(1); 1137ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 1138ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 1139ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1140ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik return 0; 1141ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik} 1142ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1143ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craikstatic void 1144ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craikcheck_param_count(int nparams, int expect) 1145ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik{ 1146ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik if (nparams != expect) 1147ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 1148ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik fprintf(stderr, "bad parameter count (internal error)\n"); 1149ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik exit(1); 1150ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 1151ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik} 1152ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1153ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craikstatic void 1154ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craikinsert_iCCP(png_structp png_ptr, png_infop info_ptr, int nparams, 1155ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik png_charpp params) 1156ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik{ 1157ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik png_bytep profile = NULL; 1158ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik png_uint_32 proflen = 0; 1159ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik int result; 1160ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1161ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik check_param_count(nparams, 2); 1162ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1163ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik switch (params[1][0]) 1164ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 1165ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik case '<': 1166ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 1167ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik png_size_t filelen = load_file(params[1]+1, &profile); 1168ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik if (filelen > 0xfffffffc) /* Maximum profile length */ 1169ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 1170ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik fprintf(stderr, "%s: file too long (%lu) for an ICC profile\n", 1171ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik params[1]+1, (unsigned long)filelen); 1172ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik exit(1); 1173ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 1174ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1175ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik proflen = (png_uint_32)filelen; 1176ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 1177ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik break; 1178ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1179ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik case '0': case '1': case '2': case '3': case '4': 1180ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik case '5': case '6': case '7': case '8': case '9': 1181ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 1182ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik png_size_t fake_len = load_fake(params[1], &profile); 1183ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1184ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik if (fake_len > 0) /* else a simple parameter */ 1185ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 1186ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik if (fake_len > 0xffffffff) /* Maximum profile length */ 1187ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 1188ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik fprintf(stderr, 1189ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik "%s: fake data too long (%lu) for an ICC profile\n", 1190ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik params[1], (unsigned long)fake_len); 1191ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik exit(1); 1192ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 1193ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik proflen = (png_uint_32)(fake_len & ~3U); 1194ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik /* Always fix up the profile length. */ 1195ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik png_save_uint_32(profile, proflen); 1196ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik break; 1197ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 1198ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 1199ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1200ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik default: 1201ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik fprintf(stderr, "--insert iCCP \"%s\": unrecognized\n", params[1]); 1202ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik fprintf(stderr, " use '<' to read a file: \"<filename\"\n"); 1203ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik exit(1); 1204ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 1205ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1206ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik result = 1; 1207ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1208ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik if (proflen & 3) 1209ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 1210ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik fprintf(stderr, 1211ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik "makepng: --insert iCCP %s: profile length made a multiple of 4\n", 1212ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik params[1]); 1213ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1214ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik /* load_file allocates extra space for this padding, the ICC spec requires 1215ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * padding with zero bytes. 1216ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik */ 1217ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik while (proflen & 3) 1218ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik profile[proflen++] = 0; 1219ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 1220ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1221ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik if (profile != NULL && proflen > 3) 1222ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 1223ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik png_uint_32 prof_header = png_get_uint_32(profile); 1224ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1225ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik if (prof_header != proflen) 1226ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 1227ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik fprintf(stderr, "--insert iCCP %s: profile length field wrong:\n", 1228ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik params[1]); 1229ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik fprintf(stderr, " actual %lu, recorded value %lu (corrected)\n", 1230ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik (unsigned long)proflen, (unsigned long)prof_header); 1231ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik png_save_uint_32(profile, proflen); 1232ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 1233ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 1234ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1235ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik if (result && profile != NULL && proflen >=4) 1236ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik png_set_iCCP(png_ptr, info_ptr, params[0], PNG_COMPRESSION_TYPE_BASE, 1237ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik profile, proflen); 1238ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1239ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik if (profile) 1240ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik free(profile); 1241ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1242ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik if (!result) 1243ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik exit(1); 1244ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik} 1245ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1246ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craikstatic void 1247ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craikclear_text(png_text *text, png_charp keyword) 1248ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik{ 1249ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik text->compression = -1; /* none */ 1250ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik text->key = keyword; 1251ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik text->text = NULL; 1252ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik text->text_length = 0; /* libpng calculates this */ 1253ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik text->itxt_length = 0; /* libpng calculates this */ 1254ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik text->lang = NULL; 1255ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik text->lang_key = NULL; 1256ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik} 1257ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1258ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craikstatic void 1259ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craikset_text(png_structp png_ptr, png_infop info_ptr, png_textp text, 1260ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik png_charp param) 1261ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik{ 1262ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik switch (param[0]) 1263ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 1264ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik case '<': 1265ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 1266ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik png_bytep file = NULL; 1267ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1268ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik text->text_length = load_file(param+1, &file); 1269ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik text->text = (png_charp)file; 1270ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 1271ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik break; 1272ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1273ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik case '0': case '1': case '2': case '3': case '4': 1274ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik case '5': case '6': case '7': case '8': case '9': 1275ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 1276ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik png_bytep data = NULL; 1277ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik png_size_t fake_len = load_fake(param, &data); 1278ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1279ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik if (fake_len > 0) /* else a simple parameter */ 1280ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 1281ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik text->text_length = fake_len; 1282ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik text->text = (png_charp)data; 1283ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik break; 1284ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 1285ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 1286ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1287ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik default: 1288ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik text->text = param; 1289ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik break; 1290ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 1291ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1292ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik png_set_text(png_ptr, info_ptr, text, 1); 1293ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1294ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik if (text->text != param) 1295ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik free(text->text); 1296ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik} 1297ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1298ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craikstatic void 1299ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craikinsert_tEXt(png_structp png_ptr, png_infop info_ptr, int nparams, 1300ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik png_charpp params) 1301ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik{ 1302ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik png_text text; 1303ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1304ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik check_param_count(nparams, 2); 1305ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik clear_text(&text, params[0]); 1306ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik set_text(png_ptr, info_ptr, &text, params[1]); 1307ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik} 1308ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1309ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craikstatic void 1310ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craikinsert_zTXt(png_structp png_ptr, png_infop info_ptr, int nparams, 1311ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik png_charpp params) 1312ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik{ 1313ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik png_text text; 1314ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1315ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik check_param_count(nparams, 2); 1316ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik clear_text(&text, params[0]); 1317ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik text.compression = 0; /* deflate */ 1318ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik set_text(png_ptr, info_ptr, &text, params[1]); 1319ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik} 1320ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1321ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craikstatic void 1322ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craikinsert_iTXt(png_structp png_ptr, png_infop info_ptr, int nparams, 1323ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik png_charpp params) 1324ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik{ 1325ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik png_text text; 1326ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1327ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik check_param_count(nparams, 4); 1328ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik clear_text(&text, params[0]); 1329ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik text.compression = 2; /* iTXt + deflate */ 1330ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik text.lang = params[1];/* language tag */ 1331ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik text.lang_key = params[2]; /* translated keyword */ 1332ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik set_text(png_ptr, info_ptr, &text, params[3]); 1333ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik} 1334ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1335ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craikstatic void 13369b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarettinsert_hIST(png_structp png_ptr, png_infop info_ptr, int nparams, 13379b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett png_charpp params) 1338ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik{ 1339ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik int i; 1340ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik png_uint_16 freq[256]; 1341ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1342ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik /* libpng takes the count from the PLTE count; we don't check it here but we 1343ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * do set the array to 0 for unspecified entries. 1344ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik */ 1345ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik memset(freq, 0, sizeof freq); 1346ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik for (i=0; i<nparams; ++i) 1347ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 1348ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik char *endptr = NULL; 1349ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik unsigned long int l = strtoul(params[i], &endptr, 0/*base*/); 1350ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1351ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik if (params[i][0] && *endptr == 0 && l <= 65535) 1352ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik freq[i] = (png_uint_16)l; 1353ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1354ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik else 1355ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 1356ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik fprintf(stderr, "hIST[%d]: %s: invalid frequency\n", i, params[i]); 1357ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik exit(1); 1358ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 1359ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 1360ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1361ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik png_set_hIST(png_ptr, info_ptr, freq); 1362ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik} 1363ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 136406f1087a94f1e48298e89d77ccc51a0ced871958Matt Sarettstatic png_byte 136506f1087a94f1e48298e89d77ccc51a0ced871958Matt Sarettbval(png_const_structrp png_ptr, png_charp param, unsigned int maxval) 136606f1087a94f1e48298e89d77ccc51a0ced871958Matt Sarett{ 136706f1087a94f1e48298e89d77ccc51a0ced871958Matt Sarett char *endptr = NULL; 136806f1087a94f1e48298e89d77ccc51a0ced871958Matt Sarett unsigned long int l = strtoul(param, &endptr, 0/*base*/); 136906f1087a94f1e48298e89d77ccc51a0ced871958Matt Sarett 137006f1087a94f1e48298e89d77ccc51a0ced871958Matt Sarett if (param[0] && *endptr == 0 && l <= maxval) 137106f1087a94f1e48298e89d77ccc51a0ced871958Matt Sarett return (png_byte)l; 137206f1087a94f1e48298e89d77ccc51a0ced871958Matt Sarett 137306f1087a94f1e48298e89d77ccc51a0ced871958Matt Sarett else 137406f1087a94f1e48298e89d77ccc51a0ced871958Matt Sarett png_error(png_ptr, "sBIT: invalid sBIT value"); 137506f1087a94f1e48298e89d77ccc51a0ced871958Matt Sarett} 137606f1087a94f1e48298e89d77ccc51a0ced871958Matt Sarett 137706f1087a94f1e48298e89d77ccc51a0ced871958Matt Sarettstatic void 137806f1087a94f1e48298e89d77ccc51a0ced871958Matt Sarettinsert_sBIT(png_structp png_ptr, png_infop info_ptr, int nparams, 137906f1087a94f1e48298e89d77ccc51a0ced871958Matt Sarett png_charpp params) 138006f1087a94f1e48298e89d77ccc51a0ced871958Matt Sarett{ 138106f1087a94f1e48298e89d77ccc51a0ced871958Matt Sarett const int ct = png_get_color_type(png_ptr, info_ptr); 138206f1087a94f1e48298e89d77ccc51a0ced871958Matt Sarett const int c = (ct & PNG_COLOR_MASK_COLOR ? 3 : 1) + 138306f1087a94f1e48298e89d77ccc51a0ced871958Matt Sarett (ct & PNG_COLOR_MASK_ALPHA ? 1 : 0); 138406f1087a94f1e48298e89d77ccc51a0ced871958Matt Sarett const unsigned int maxval = 138506f1087a94f1e48298e89d77ccc51a0ced871958Matt Sarett ct & PNG_COLOR_MASK_PALETTE ? 8U : png_get_bit_depth(png_ptr, info_ptr); 138606f1087a94f1e48298e89d77ccc51a0ced871958Matt Sarett png_color_8 sBIT; 138706f1087a94f1e48298e89d77ccc51a0ced871958Matt Sarett 138806f1087a94f1e48298e89d77ccc51a0ced871958Matt Sarett if (nparams != c) 138906f1087a94f1e48298e89d77ccc51a0ced871958Matt Sarett png_error(png_ptr, "sBIT: incorrect parameter count"); 139006f1087a94f1e48298e89d77ccc51a0ced871958Matt Sarett 139106f1087a94f1e48298e89d77ccc51a0ced871958Matt Sarett if (ct & PNG_COLOR_MASK_COLOR) 139206f1087a94f1e48298e89d77ccc51a0ced871958Matt Sarett { 139306f1087a94f1e48298e89d77ccc51a0ced871958Matt Sarett sBIT.red = bval(png_ptr, params[0], maxval); 139406f1087a94f1e48298e89d77ccc51a0ced871958Matt Sarett sBIT.green = bval(png_ptr, params[1], maxval); 139506f1087a94f1e48298e89d77ccc51a0ced871958Matt Sarett sBIT.blue = bval(png_ptr, params[2], maxval); 139606f1087a94f1e48298e89d77ccc51a0ced871958Matt Sarett sBIT.gray = 42; 139706f1087a94f1e48298e89d77ccc51a0ced871958Matt Sarett } 139806f1087a94f1e48298e89d77ccc51a0ced871958Matt Sarett 139906f1087a94f1e48298e89d77ccc51a0ced871958Matt Sarett else 140006f1087a94f1e48298e89d77ccc51a0ced871958Matt Sarett { 140106f1087a94f1e48298e89d77ccc51a0ced871958Matt Sarett sBIT.red = sBIT.green = sBIT.blue = 42; 140206f1087a94f1e48298e89d77ccc51a0ced871958Matt Sarett sBIT.gray = bval(png_ptr, params[0], maxval); 140306f1087a94f1e48298e89d77ccc51a0ced871958Matt Sarett } 140406f1087a94f1e48298e89d77ccc51a0ced871958Matt Sarett 140506f1087a94f1e48298e89d77ccc51a0ced871958Matt Sarett if (ct & PNG_COLOR_MASK_ALPHA) 140606f1087a94f1e48298e89d77ccc51a0ced871958Matt Sarett sBIT.alpha = bval(png_ptr, params[nparams-1], maxval); 140706f1087a94f1e48298e89d77ccc51a0ced871958Matt Sarett 140806f1087a94f1e48298e89d77ccc51a0ced871958Matt Sarett else 140906f1087a94f1e48298e89d77ccc51a0ced871958Matt Sarett sBIT.alpha = 42; 141006f1087a94f1e48298e89d77ccc51a0ced871958Matt Sarett 141106f1087a94f1e48298e89d77ccc51a0ced871958Matt Sarett png_set_sBIT(png_ptr, info_ptr, &sBIT); 141206f1087a94f1e48298e89d77ccc51a0ced871958Matt Sarett} 141306f1087a94f1e48298e89d77ccc51a0ced871958Matt Sarett 1414ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik#if 0 1415ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craikstatic void 1416ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craikinsert_sPLT(png_structp png_ptr, png_infop info_ptr, int nparams, png_charpp params) 1417ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik{ 1418ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik fprintf(stderr, "insert sPLT: NYI\n"); 1419ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik} 1420ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik#endif 1421ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1422ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craikstatic int 1423ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craikfind_parameters(png_const_charp what, png_charp param, png_charp *list, 1424ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik int nparams) 1425ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik{ 1426ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik /* Parameters are separated by '\n' or ':' characters, up to nparams are 1427ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * accepted (more is an error) and the number found is returned. 1428ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik */ 1429ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik int i; 1430ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik for (i=0; *param && i<nparams; ++i) 1431ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 1432ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik list[i] = param; 1433ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik while (*++param) if (*param == '\n' || *param == ':') 1434ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 1435ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik *param++ = 0; /* Terminate last parameter */ 1436ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik break; /* And start a new one. */ 1437ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 1438ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 1439ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1440ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik if (*param) 1441ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 1442ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik fprintf(stderr, "--insert %s: too many parameters (%s)\n", what, param); 1443ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik exit(1); 1444ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 1445ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1446ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik list[i] = NULL; /* terminates list */ 1447ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik return i; /* number of parameters filled in */ 1448ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik} 1449ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1450ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craikstatic void 1451ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craikbad_parameter_count(png_const_charp what, int nparams) 1452ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik{ 1453ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik fprintf(stderr, "--insert %s: bad parameter count %d\n", what, nparams); 1454ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik exit(1); 1455ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik} 1456ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1457ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craikstatic chunk_insert * 1458ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craikmake_insert(png_const_charp what, 1459ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik void (*insert)(png_structp, png_infop, int, png_charpp), 1460ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik int nparams, png_charpp list) 1461ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik{ 1462ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik int i; 1463ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik chunk_insert *cip; 1464ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1465ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik cip = malloc(offsetof(chunk_insert,parameters) + 1466ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik nparams * sizeof (png_charp)); 1467ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1468ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik if (cip == NULL) 1469ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 1470ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik fprintf(stderr, "--insert %s: out of memory allocating %d parameters\n", 1471ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik what, nparams); 1472ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik exit(1); 1473ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 1474ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1475ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik cip->next = NULL; 1476ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik cip->insert = insert; 1477ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik cip->nparams = nparams; 1478ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik for (i=0; i<nparams; ++i) 1479ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik cip->parameters[i] = list[i]; 1480ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1481ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik return cip; 1482ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik} 1483ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1484ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craikstatic chunk_insert * 1485ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craikfind_insert(png_const_charp what, png_charp param) 1486ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik{ 1487ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik png_uint_32 chunk = 0; 1488ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik png_charp parameter_list[1024]; 1489ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik int i, nparams; 1490ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1491ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik /* Assemble the chunk name */ 1492ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik for (i=0; i<4; ++i) 1493ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 1494ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik char ch = what[i]; 1495ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1496ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik if ((ch >= 65 && ch <= 90) || (ch >= 97 && ch <= 122)) 1497ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik chunk = (chunk << 8) + what[i]; 1498ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1499ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik else 1500ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik break; 1501ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 1502ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1503ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik if (i < 4 || what[4] != 0) 1504ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 1505ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik fprintf(stderr, "makepng --insert \"%s\": invalid chunk name\n", what); 1506ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik exit(1); 1507ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 1508ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1509ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik /* Assemble the parameter list. */ 1510ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik nparams = find_parameters(what, param, parameter_list, 1024); 1511ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1512ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik# define CHUNK(a,b,c,d) (((a)<<24)+((b)<<16)+((c)<<8)+(d)) 1513ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1514ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik switch (chunk) 1515ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 1516ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik case CHUNK(105,67,67,80): /* iCCP */ 1517ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik if (nparams == 2) 1518ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik return make_insert(what, insert_iCCP, nparams, parameter_list); 1519ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik break; 1520ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1521ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik case CHUNK(116,69,88,116): /* tEXt */ 1522ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik if (nparams == 2) 1523ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik return make_insert(what, insert_tEXt, nparams, parameter_list); 1524ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik break; 1525ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1526ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik case CHUNK(122,84,88,116): /* zTXt */ 1527ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik if (nparams == 2) 1528ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik return make_insert(what, insert_zTXt, nparams, parameter_list); 1529ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik break; 1530ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1531ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik case CHUNK(105,84,88,116): /* iTXt */ 1532ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik if (nparams == 4) 1533ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik return make_insert(what, insert_iTXt, nparams, parameter_list); 1534ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik break; 1535ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1536ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik case CHUNK(104,73,83,84): /* hIST */ 1537ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik if (nparams <= 256) 1538ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik return make_insert(what, insert_hIST, nparams, parameter_list); 1539ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik break; 1540ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 154106f1087a94f1e48298e89d77ccc51a0ced871958Matt Sarett case CHUNK(115,66,73,84): /* sBIT */ 154206f1087a94f1e48298e89d77ccc51a0ced871958Matt Sarett if (nparams <= 4) 154306f1087a94f1e48298e89d77ccc51a0ced871958Matt Sarett return make_insert(what, insert_sBIT, nparams, parameter_list); 154406f1087a94f1e48298e89d77ccc51a0ced871958Matt Sarett break; 154506f1087a94f1e48298e89d77ccc51a0ced871958Matt Sarett 1546ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik#if 0 1547ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik case CHUNK(115,80,76,84): /* sPLT */ 1548ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik return make_insert(what, insert_sPLT, nparams, parameter_list); 1549ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik#endif 1550ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1551ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik default: 1552ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik fprintf(stderr, "makepng --insert \"%s\": unrecognized chunk name\n", 1553ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik what); 1554ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik exit(1); 1555ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 1556ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1557ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik bad_parameter_count(what, nparams); 1558ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik return NULL; 1559ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik} 1560ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 15619b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett/* This is necessary because libpng expects writeable strings for things like 15629b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * text chunks (maybe this should be fixed...) 15639b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett */ 15649b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarettstatic png_charp 15659b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarettstrstash(png_const_charp foo) 15669b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett{ 15679b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett /* The program indicates a memory allocation error by crashing, this is by 15689b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * design. 15699b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett */ 15709b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett if (foo != NULL) 15719b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett { 15729b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett png_charp bar = malloc(strlen(foo)+1); 15739b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett return strcpy(bar, foo); 15749b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett } 15759b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett 15769b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett return NULL; 15779b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett} 15789b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett 15799b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarettstatic png_charp 15809b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarettstrstash_list(const png_const_charp *text) 15819b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett{ 15829b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett size_t foo = 0; 15839b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett png_charp result, bar; 15849b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett const png_const_charp *line = text; 15859b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett 15869b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett while (*line != NULL) 15879b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett foo += strlen(*line++); 15889b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett 15899b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett result = bar = malloc(foo+1); 15909b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett 15919b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett line = text; 15929b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett while (*line != NULL) 15939b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett { 15949b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett foo = strlen(*line); 15959b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett memcpy(bar, *line++, foo); 15969b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett bar += foo; 15979b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett } 15989b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett 15999b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett *bar = 0; 16009b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett return result; 16019b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett} 16029b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett 16039b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett/* These are used to insert Copyright and Licence fields, they allow the text to 16049b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * have \n unlike the --insert option. 16059b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett */ 16069b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarettstatic chunk_insert * 16079b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarettadd_tEXt(const char *key, const png_const_charp *text) 16089b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett{ 16099b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett static char what[5] = { 116, 69, 88, 116, 0 }; 16109b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett png_charp parameter_list[3]; 16119b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett 16129b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett parameter_list[0] = strstash(key); 16139b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett parameter_list[1] = strstash_list(text); 16149b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett parameter_list[2] = NULL; 16159b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett 16169b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett return make_insert(what, insert_tEXt, 2, parameter_list); 16179b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett} 16189b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett 16199b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarettstatic chunk_insert * 16209b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarettadd_iTXt(const char *key, const char *language, const char *language_key, 16219b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett const png_const_charp *text) 16229b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett{ 16239b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett static char what[5] = { 105, 84, 88, 116, 0 }; 16249b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett png_charp parameter_list[5]; 16259b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett 16269b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett parameter_list[0] = strstash(key); 16279b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett parameter_list[1] = strstash(language); 16289b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett parameter_list[2] = strstash(language_key); 16299b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett parameter_list[3] = strstash_list(text); 16309b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett parameter_list[4] = NULL; 16319b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett 16329b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett return make_insert(what, insert_iTXt, 4, parameter_list); 16339b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett} 16349b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett 1635ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik/* This is a not-very-good parser for a sequence of numbers (including 0). It 1636ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * doesn't accept some apparently valid things, but it accepts all the sensible 1637ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * combinations. 1638ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik */ 1639ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craikstatic void 1640ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craikparse_color(char *arg, unsigned int *colors) 1641ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik{ 1642ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik unsigned int ncolors = 0; 1643ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1644ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik while (*arg && ncolors < 4) 1645ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 1646ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik char *ep = arg; 1647ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1648ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik unsigned long ul = strtoul(arg, &ep, 0); 1649ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1650ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik if (ul > 65535) 1651ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 1652ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik fprintf(stderr, "makepng --color=...'%s': too big\n", arg); 1653ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik exit(1); 1654ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 1655ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1656ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik if (ep == arg) 1657ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 1658ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik fprintf(stderr, "makepng --color=...'%s': not a valid color\n", arg); 1659ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik exit(1); 1660ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 1661ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1662ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik if (*ep) ++ep; /* skip a separator */ 1663ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik arg = ep; 1664ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1665ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik colors[++ncolors] = (unsigned int)ul; /* checked above */ 1666ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 1667ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1668ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik if (*arg) 1669ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 1670ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik fprintf(stderr, "makepng --color=...'%s': too many values\n", arg); 1671ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik exit(1); 1672ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 1673ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1674ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik *colors = ncolors; 1675ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik} 1676ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1677ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craikint 1678ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craikmain(int argc, char **argv) 1679ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik{ 1680ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik FILE *fp = stdout; 1681ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik const char *file_name = NULL; 1682ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik int color_type = 8; /* invalid */ 1683ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik int bit_depth = 32; /* invalid */ 16849b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett int small = 0; /* make full size images */ 16859b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett int tRNS = 0; /* don't output a tRNS chunk */ 1686ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik unsigned int colors[5]; 1687ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik unsigned int filters = PNG_ALL_FILTERS; 1688ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik png_fixed_point gamma = 0; /* not set */ 1689ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik chunk_insert *head_insert = NULL; 1690ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik chunk_insert **insert_ptr = &head_insert; 1691ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1692ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik memset(colors, 0, sizeof colors); 1693ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1694ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik while (--argc > 0) 1695ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 1696ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik char *arg = *++argv; 1697ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 16989b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett if (strcmp(arg, "--small") == 0) 16999b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett { 17009b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett small = 1; 17019b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett continue; 17029b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett } 17039b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett 17049b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett if (strcmp(arg, "--tRNS") == 0) 17059b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett { 17069b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett tRNS = 1; 17079b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett continue; 17089b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett } 17099b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett 1710ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik if (strcmp(arg, "--sRGB") == 0) 1711ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 1712ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik gamma = PNG_DEFAULT_sRGB; 1713ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik continue; 1714ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 1715ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1716ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik if (strcmp(arg, "--linear") == 0) 1717ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 1718ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik gamma = PNG_FP_1; 1719ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik continue; 1720ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 1721ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1722ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik if (strcmp(arg, "--1.8") == 0) 1723ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 1724ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik gamma = PNG_GAMMA_MAC_18; 1725ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik continue; 1726ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 1727ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1728ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik if (strcmp(arg, "--nofilters") == 0) 1729ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 1730ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik filters = PNG_FILTER_NONE; 1731ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik continue; 1732ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 1733ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1734ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik if (strncmp(arg, "--color=", 8) == 0) 1735ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 1736ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik parse_color(arg+8, colors); 1737ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik continue; 1738ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 1739ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1740ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik if (argc >= 3 && strcmp(arg, "--insert") == 0) 1741ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 1742ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik png_const_charp what = *++argv; 1743ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik png_charp param = *++argv; 1744ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik chunk_insert *new_insert; 1745ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1746ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik argc -= 2; 1747ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1748ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik new_insert = find_insert(what, param); 1749ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1750ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik if (new_insert != NULL) 1751ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 1752ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik *insert_ptr = new_insert; 1753ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik insert_ptr = &new_insert->next; 1754ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 1755ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1756ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik continue; 1757ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 1758ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1759ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik if (arg[0] == '-') 1760ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 1761ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik fprintf(stderr, "makepng: %s: invalid option\n", arg); 1762ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik exit(1); 1763ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 1764ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1765ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik if (strcmp(arg, "palette") == 0) 1766ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 1767ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik color_type = PNG_COLOR_TYPE_PALETTE; 1768ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik continue; 1769ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 1770ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1771ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik if (strncmp(arg, "gray", 4) == 0) 1772ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 1773ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik if (arg[4] == 0) 1774ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 1775ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik color_type = PNG_COLOR_TYPE_GRAY; 1776ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik continue; 1777ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 1778ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1779ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik else if (strcmp(arg+4, "a") == 0 || 1780ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik strcmp(arg+4, "alpha") == 0 || 1781ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik strcmp(arg+4, "-alpha") == 0) 1782ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 1783ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik color_type = PNG_COLOR_TYPE_GRAY_ALPHA; 1784ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik continue; 1785ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 1786ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 1787ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1788ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik if (strncmp(arg, "rgb", 3) == 0) 1789ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 1790ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik if (arg[3] == 0) 1791ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 1792ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik color_type = PNG_COLOR_TYPE_RGB; 1793ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik continue; 1794ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 1795ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1796ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik else if (strcmp(arg+3, "a") == 0 || 1797ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik strcmp(arg+3, "alpha") == 0 || 1798ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik strcmp(arg+3, "-alpha") == 0) 1799ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 1800ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik color_type = PNG_COLOR_TYPE_RGB_ALPHA; 1801ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik continue; 1802ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 1803ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 1804ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1805ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik if (color_type == 8 && isdigit(arg[0])) 1806ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 1807ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik color_type = atoi(arg); 1808ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik if (color_type < 0 || color_type > 6 || color_type == 1 || 1809ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik color_type == 5) 1810ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 1811ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik fprintf(stderr, "makepng: %s: not a valid color type\n", arg); 1812ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik exit(1); 1813ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 1814ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1815ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik continue; 1816ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 1817ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1818ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik if (bit_depth == 32 && isdigit(arg[0])) 1819ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 1820ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik bit_depth = atoi(arg); 1821ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik if (bit_depth <= 0 || bit_depth > 16 || 1822ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik (bit_depth & -bit_depth) != bit_depth) 1823ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 1824ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik fprintf(stderr, "makepng: %s: not a valid bit depth\n", arg); 1825ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik exit(1); 1826ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 1827ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1828ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik continue; 1829ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 1830ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1831ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik if (argc == 1) /* It's the file name */ 1832ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 1833ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik fp = fopen(arg, "wb"); 1834ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik if (fp == NULL) 1835ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 1836ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik fprintf(stderr, "%s: %s: could not open\n", arg, strerror(errno)); 1837ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik exit(1); 1838ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 1839ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1840ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik file_name = arg; 1841ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik continue; 1842ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 1843ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1844ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik fprintf(stderr, "makepng: %s: unknown argument\n", arg); 1845ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik exit(1); 1846ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } /* argument while loop */ 1847ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1848ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik if (color_type == 8 || bit_depth == 32) 1849ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 18509b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett fprintf(stderr, "usage: makepng [--small] [--sRGB|--linear|--1.8] " 1851ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik "[--color=...] color-type bit-depth [file-name]\n" 18529b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett " Make a test PNG file, by default writes to stdout.\n" 18539b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett " Other options are available, UTSL.\n"); 1854ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik exit(1); 1855ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 1856ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1857ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik /* Check the colors */ 1858ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 1859ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik const unsigned int lim = (color_type == PNG_COLOR_TYPE_PALETTE ? 255U : 1860ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik (1U<<bit_depth)-1); 1861ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik unsigned int i; 1862ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1863ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik for (i=1; i<=colors[0]; ++i) 1864ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik if (colors[i] > lim) 1865ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 1866ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik fprintf(stderr, "makepng: --color=...: %u out of range [0..%u]\n", 1867ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik colors[i], lim); 1868ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik exit(1); 1869ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 1870ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 1871ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 18729b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett /* small and colors are incomparible (will probably crash if both are used at 18739b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett * the same time!) 18749b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett */ 18759b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett if (small && colors[0] != 0) 18769b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett { 18779b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett fprintf(stderr, "makepng: --color --small: only one at a time!\n"); 18789b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett exit(1); 18799b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett } 18809b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett 1881ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik /* Restrict the filters for more speed to those we know are used for the 1882ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik * generated images. 1883ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik */ 18849b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett if (filters == PNG_ALL_FILTERS && !small/*small provides defaults*/) 1885ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 1886ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik if ((color_type & PNG_COLOR_MASK_PALETTE) != 0 || bit_depth < 8) 1887ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik filters = PNG_FILTER_NONE; 1888ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1889ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik else if (color_type & PNG_COLOR_MASK_COLOR) /* rgb */ 1890ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 1891ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik if (bit_depth == 8) 1892ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik filters &= ~(PNG_FILTER_NONE | PNG_FILTER_AVG); 1893ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1894ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik else 1895ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik filters = PNG_FILTER_SUB | PNG_FILTER_PAETH; 1896ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 1897ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1898ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik else /* gray 8 or 16-bit */ 1899ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik filters &= ~PNG_FILTER_NONE; 1900ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 1901ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 19029b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett /* Insert standard copyright and licence text. */ 19039b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett { 19049b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett static png_const_charp copyright[] = 19059b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett { 19069b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett COPYRIGHT, /* ISO-Latin-1 */ 19079b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett NULL 19089b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett }; 19099b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett static png_const_charp licensing[] = 19109b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett { 19119b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett IMAGE_LICENSING, /* UTF-8 */ 19129b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett NULL 19139b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett }; 19149b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett 19159b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett chunk_insert *new_insert; 191606f1087a94f1e48298e89d77ccc51a0ced871958Matt Sarett 19179b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett new_insert = add_tEXt("Copyright", copyright); 19189b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett if (new_insert != NULL) 19199b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett { 19209b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett *insert_ptr = new_insert; 19219b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett insert_ptr = &new_insert->next; 19229b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett } 19239b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett 19249b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett new_insert = add_iTXt("Licensing", "en", NULL, licensing); 19259b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett if (new_insert != NULL) 19269b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett { 19279b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett *insert_ptr = new_insert; 19289b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett insert_ptr = &new_insert->next; 19299b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett } 19309b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett } 19319b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett 1932ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 1933ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik int ret = write_png(&file_name, fp, color_type, bit_depth, gamma, 19349b1fe63dcc7ba076b9730b7bfa031cc0dbc25561Matt Sarett head_insert, filters, colors, small, tRNS); 1935ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1936ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik if (ret != 0 && file_name != NULL) 1937ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik remove(file_name); 1938ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 1939ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik return ret; 1940ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 1941ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik} 1942