1893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* 2893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * pnm2png.c --- conversion from PBM/PGM/PPM-file to PNG-file 3893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * copyright (C) 1999 by Willem van Schaik <willem@schaik.com> 4893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * 5893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * version 1.0 - 1999.10.15 - First version. 6893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * 7893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * Permission to use, copy, modify, and distribute this software and 8893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * its documentation for any purpose and without fee is hereby granted, 9893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * provided that the above copyright notice appear in all copies and 10893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * that both that copyright notice and this permission notice appear in 11893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * supporting documentation. This software is provided "as is" without 12893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * express or implied warranty. 13893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project */ 14893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 15893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#include <stdio.h> 16893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#include <stdlib.h> 17893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#ifdef __TURBOC__ 18893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#include <mem.h> 19893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#include <fcntl.h> 20893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 21ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik#include <zlib.h> 22893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 23893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#ifndef BOOL 24893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#define BOOL unsigned char 25893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 26893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#ifndef TRUE 27893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#define TRUE (BOOL) 1 28893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 29893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#ifndef FALSE 30893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#define FALSE (BOOL) 0 31893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 32893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 33893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#define STDIN 0 34893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#define STDOUT 1 35893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#define STDERR 2 36893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 37893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* to make pnm2png verbose so we can find problems (needs to be before png.h) */ 38893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#ifndef PNG_DEBUG 39893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#define PNG_DEBUG 0 40893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 41893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 42893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#include "png.h" 43893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 44893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* Define png_jmpbuf() in case we are using a pre-1.0.6 version of libpng */ 45893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#ifndef png_jmpbuf 46893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project# define png_jmpbuf(png_ptr) ((png_ptr)->jmpbuf) 47893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 48893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 49893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* function prototypes */ 50893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 51893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectint main (int argc, char *argv[]); 52893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectvoid usage (); 53893912bfc2683463dc3e2c445336752d012563d3The Android Open Source ProjectBOOL pnm2png (FILE *pnm_file, FILE *png_file, FILE *alpha_file, BOOL interlace, BOOL alpha); 54893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectvoid get_token(FILE *pnm_file, char *token); 55893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_uint_32 get_data (FILE *pnm_file, int depth); 56893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_uint_32 get_value (FILE *pnm_file, int depth); 57893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 58893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* 59893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * main 60893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project */ 61893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 62893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectint main(int argc, char *argv[]) 63893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project{ 64893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project FILE *fp_rd = stdin; 65893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project FILE *fp_al = NULL; 66893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project FILE *fp_wr = stdout; 67893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project BOOL interlace = FALSE; 68893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project BOOL alpha = FALSE; 69893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project int argi; 70893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 71893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project for (argi = 1; argi < argc; argi++) 72893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project { 73893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if (argv[argi][0] == '-') 74893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project { 75893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project switch (argv[argi][1]) 76893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project { 77893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project case 'i': 78893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project interlace = TRUE; 79893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project break; 80893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project case 'a': 81893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project alpha = TRUE; 82893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project argi++; 83893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if ((fp_al = fopen (argv[argi], "rb")) == NULL) 84893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project { 85893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project fprintf (stderr, "PNM2PNG\n"); 86893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project fprintf (stderr, "Error: alpha-channel file %s does not exist\n", 87893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project argv[argi]); 88893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project exit (1); 89893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project } 90893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project break; 91893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project case 'h': 92893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project case '?': 93893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project usage(); 94893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project exit(0); 95893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project break; 96893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project default: 97893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project fprintf (stderr, "PNM2PNG\n"); 98893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project fprintf (stderr, "Error: unknown option %s\n", argv[argi]); 99893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project usage(); 100893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project exit(1); 101893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project break; 102893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project } /* end switch */ 103893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project } 104893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project else if (fp_rd == stdin) 105893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project { 106893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if ((fp_rd = fopen (argv[argi], "rb")) == NULL) 107893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project { 108893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project fprintf (stderr, "PNM2PNG\n"); 109893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project fprintf (stderr, "Error: file %s does not exist\n", argv[argi]); 110893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project exit (1); 111893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project } 112893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project } 113893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project else if (fp_wr == stdout) 114893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project { 115893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if ((fp_wr = fopen (argv[argi], "wb")) == NULL) 116893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project { 117893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project fprintf (stderr, "PNM2PNG\n"); 118893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project fprintf (stderr, "Error: can not create PNG-file %s\n", argv[argi]); 119893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project exit (1); 120893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project } 121893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project } 122893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project else 123893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project { 124893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project fprintf (stderr, "PNM2PNG\n"); 125893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project fprintf (stderr, "Error: too many parameters\n"); 126893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project usage(); 127893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project exit (1); 128893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project } 129893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project } /* end for */ 130893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 131893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#ifdef __TURBOC__ 132893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project /* set stdin/stdout to binary, we're reading the PNM always! in binary format */ 133893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if (fp_rd == stdin) 134893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project { 135893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project setmode (STDIN, O_BINARY); 136893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project } 137893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if (fp_wr == stdout) 138893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project { 139893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project setmode (STDOUT, O_BINARY); 140893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project } 141893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 142893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 143893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project /* call the conversion program itself */ 144893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if (pnm2png (fp_rd, fp_wr, fp_al, interlace, alpha) == FALSE) 145893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project { 146893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project fprintf (stderr, "PNM2PNG\n"); 147893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project fprintf (stderr, "Error: unsuccessful converting to PNG-image\n"); 148893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project exit (1); 149893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project } 150893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 151893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project /* close input file */ 152893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project fclose (fp_rd); 153893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project /* close output file */ 154893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project fclose (fp_wr); 155893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project /* close alpha file */ 156893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if (alpha) 157893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project fclose (fp_al); 158893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 159893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project return 0; 160893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project} 161893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 162893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* 163893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * usage 164893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project */ 165893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 166893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectvoid usage() 167893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project{ 168893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project fprintf (stderr, "PNM2PNG\n"); 169893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project fprintf (stderr, " by Willem van Schaik, 1999\n"); 170893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#ifdef __TURBOC__ 171893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project fprintf (stderr, " for Turbo-C and Borland-C compilers\n"); 172893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#else 173893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project fprintf (stderr, " for Linux (and Unix) compilers\n"); 174893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 175893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project fprintf (stderr, "Usage: pnm2png [options] <file>.<pnm> [<file>.png]\n"); 176893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project fprintf (stderr, " or: ... | pnm2png [options]\n"); 177893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project fprintf (stderr, "Options:\n"); 178893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project fprintf (stderr, " -i[nterlace] write png-file with interlacing on\n"); 179893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project fprintf (stderr, " -a[lpha] <file>.pgm read PNG alpha channel as pgm-file\n"); 180893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project fprintf (stderr, " -h | -? print this help-information\n"); 181893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project} 182893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 183893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* 184893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * pnm2png 185893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project */ 186893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 187893912bfc2683463dc3e2c445336752d012563d3The Android Open Source ProjectBOOL pnm2png (FILE *pnm_file, FILE *png_file, FILE *alpha_file, BOOL interlace, BOOL alpha) 188893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project{ 189893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_struct *png_ptr = NULL; 190893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_info *info_ptr = NULL; 191893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_byte *png_pixels = NULL; 192893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_byte **row_pointers = NULL; 193893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_byte *pix_ptr = NULL; 194893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_uint_32 row_bytes; 195893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 196893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project char type_token[16]; 197893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project char width_token[16]; 198893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project char height_token[16]; 199893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project char maxval_token[16]; 200893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project int color_type; 201ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik unsigned long ul_width=0, ul_alpha_width=0; 202ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik unsigned long ul_height=0, ul_alpha_height=0; 203ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik unsigned long ul_maxval=0; 204893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_uint_32 width, alpha_width; 205893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_uint_32 height, alpha_height; 206893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_uint_32 maxval; 207893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project int bit_depth = 0; 208893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project int channels; 209893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project int alpha_depth = 0; 210893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project int alpha_present; 211893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project int row, col; 212893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project BOOL raw, alpha_raw = FALSE; 213ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik#if defined(PNG_WRITE_INVERT_SUPPORTED) || defined(PNG_WRITE_PACK_SUPPORTED) 214ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik BOOL packed_bitmap = FALSE; 215ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik#endif 216893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_uint_32 tmp16; 217893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project int i; 218893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 219893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project /* read header of PNM file */ 220893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 221893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project get_token(pnm_file, type_token); 222893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if (type_token[0] != 'P') 223893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project { 224893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project return FALSE; 225893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project } 226893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project else if ((type_token[1] == '1') || (type_token[1] == '4')) 227893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project { 228ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik#if defined(PNG_WRITE_INVERT_SUPPORTED) || defined(PNG_WRITE_PACK_SUPPORTED) 229893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project raw = (type_token[1] == '4'); 230893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project color_type = PNG_COLOR_TYPE_GRAY; 231ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik get_token(pnm_file, width_token); 232ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik sscanf (width_token, "%lu", &ul_width); 233ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik width = (png_uint_32) ul_width; 234ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik get_token(pnm_file, height_token); 235ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik sscanf (height_token, "%lu", &ul_height); 236ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik height = (png_uint_32) ul_height; 237893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project bit_depth = 1; 238ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik packed_bitmap = TRUE; 239ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik#else 240ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik fprintf (stderr, "PNM2PNG built without PNG_WRITE_INVERT_SUPPORTED and \n"); 241ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik fprintf (stderr, "PNG_WRITE_PACK_SUPPORTED can't read PBM (P1,P4) files\n"); 242ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik#endif 243893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project } 244893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project else if ((type_token[1] == '2') || (type_token[1] == '5')) 245893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project { 246893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project raw = (type_token[1] == '5'); 247893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project color_type = PNG_COLOR_TYPE_GRAY; 248893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project get_token(pnm_file, width_token); 249ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik sscanf (width_token, "%lu", &ul_width); 250ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik width = (png_uint_32) ul_width; 251893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project get_token(pnm_file, height_token); 252ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik sscanf (height_token, "%lu", &ul_height); 253ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik height = (png_uint_32) ul_height; 254893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project get_token(pnm_file, maxval_token); 255ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik sscanf (maxval_token, "%lu", &ul_maxval); 256ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik maxval = (png_uint_32) ul_maxval; 257ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 258893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if (maxval <= 1) 259893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project bit_depth = 1; 260893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project else if (maxval <= 3) 261893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project bit_depth = 2; 262893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project else if (maxval <= 15) 263893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project bit_depth = 4; 264893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project else if (maxval <= 255) 265893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project bit_depth = 8; 266893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project else /* if (maxval <= 65535) */ 267893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project bit_depth = 16; 268893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project } 269893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project else if ((type_token[1] == '3') || (type_token[1] == '6')) 270893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project { 271893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project raw = (type_token[1] == '6'); 272893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project color_type = PNG_COLOR_TYPE_RGB; 273893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project get_token(pnm_file, width_token); 274ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik sscanf (width_token, "%lu", &ul_width); 275ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik width = (png_uint_32) ul_width; 276893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project get_token(pnm_file, height_token); 277ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik sscanf (height_token, "%lu", &ul_height); 278ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik height = (png_uint_32) ul_height; 279893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project get_token(pnm_file, maxval_token); 280ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik sscanf (maxval_token, "%lu", &ul_maxval); 281ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik maxval = (png_uint_32) ul_maxval; 282893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if (maxval <= 1) 283893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project bit_depth = 1; 284893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project else if (maxval <= 3) 285893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project bit_depth = 2; 286893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project else if (maxval <= 15) 287893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project bit_depth = 4; 288893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project else if (maxval <= 255) 289893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project bit_depth = 8; 290893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project else /* if (maxval <= 65535) */ 291893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project bit_depth = 16; 292893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project } 293893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project else 294893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project { 295893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project return FALSE; 296893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project } 297893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 298893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project /* read header of PGM file with alpha channel */ 299893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 300893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if (alpha) 301893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project { 302893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if (color_type == PNG_COLOR_TYPE_GRAY) 303893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project color_type = PNG_COLOR_TYPE_GRAY_ALPHA; 304893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if (color_type == PNG_COLOR_TYPE_RGB) 305893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project color_type = PNG_COLOR_TYPE_RGB_ALPHA; 306893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 307893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project get_token(alpha_file, type_token); 308893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if (type_token[0] != 'P') 309893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project { 310893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project return FALSE; 311893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project } 312893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project else if ((type_token[1] == '2') || (type_token[1] == '5')) 313893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project { 314893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project alpha_raw = (type_token[1] == '5'); 315893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project get_token(alpha_file, width_token); 316ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik sscanf (width_token, "%lu", &ul_alpha_width); 317ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik alpha_width=(png_uint_32) ul_alpha_width; 318893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if (alpha_width != width) 319893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project return FALSE; 320893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project get_token(alpha_file, height_token); 321ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik sscanf (height_token, "%lu", &ul_alpha_height); 322ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik alpha_height = (png_uint_32) ul_alpha_height; 323893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if (alpha_height != height) 324893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project return FALSE; 325893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project get_token(alpha_file, maxval_token); 326ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik sscanf (maxval_token, "%lu", &ul_maxval); 327ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik maxval = (png_uint_32) ul_maxval; 328893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if (maxval <= 1) 329893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project alpha_depth = 1; 330893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project else if (maxval <= 3) 331893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project alpha_depth = 2; 332893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project else if (maxval <= 15) 333893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project alpha_depth = 4; 334893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project else if (maxval <= 255) 335893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project alpha_depth = 8; 336893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project else /* if (maxval <= 65535) */ 337893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project alpha_depth = 16; 338893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if (alpha_depth != bit_depth) 339893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project return FALSE; 340893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project } 341893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project else 342893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project { 343893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project return FALSE; 344893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project } 345893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project } /* end if alpha */ 346893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 347893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project /* calculate the number of channels and store alpha-presence */ 348893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if (color_type == PNG_COLOR_TYPE_GRAY) 349893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project channels = 1; 350893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project else if (color_type == PNG_COLOR_TYPE_GRAY_ALPHA) 351893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project channels = 2; 352893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project else if (color_type == PNG_COLOR_TYPE_RGB) 353893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project channels = 3; 354893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project else if (color_type == PNG_COLOR_TYPE_RGB_ALPHA) 355893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project channels = 4; 356893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project else 357893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project channels = 0; /* should not happen */ 358893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 359893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project alpha_present = (channels - 1) % 2; 360893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 361ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik#if defined(PNG_WRITE_INVERT_SUPPORTED) || defined(PNG_WRITE_PACK_SUPPORTED) 362ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik if (packed_bitmap) 363ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik /* row data is as many bytes as can fit width x channels x bit_depth */ 364ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik row_bytes = (width * channels * bit_depth + 7) / 8; 365ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik else 366ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik#endif 367ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik /* row_bytes is the width x number of channels x (bit-depth / 8) */ 368ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik row_bytes = width * channels * ((bit_depth <= 8) ? 1 : 2); 369893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 370893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if ((png_pixels = (png_byte *) malloc (row_bytes * height * sizeof (png_byte))) == NULL) 371893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project return FALSE; 372893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 373893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project /* read data from PNM file */ 374893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project pix_ptr = png_pixels; 375893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 376893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project for (row = 0; row < height; row++) 377893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project { 378ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik#if defined(PNG_WRITE_INVERT_SUPPORTED) || defined(PNG_WRITE_PACK_SUPPORTED) 379ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik if (packed_bitmap) { 380ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik for (i = 0; i < row_bytes; i++) 381ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik /* png supports this format natively so no conversion is needed */ 382ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik *pix_ptr++ = get_data (pnm_file, 8); 383ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } else 384ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik#endif 385893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project { 386ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik for (col = 0; col < width; col++) 387893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project { 388ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik for (i = 0; i < (channels - alpha_present); i++) 389ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 390ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik if (raw) 391ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik *pix_ptr++ = get_data (pnm_file, bit_depth); 392893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project else 393ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik if (bit_depth <= 8) 394ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik *pix_ptr++ = get_value (pnm_file, bit_depth); 395ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik else 396ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 397ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik tmp16 = get_value (pnm_file, bit_depth); 398ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik *pix_ptr = (png_byte) ((tmp16 >> 8) & 0xFF); 399ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik pix_ptr++; 400ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik *pix_ptr = (png_byte) (tmp16 & 0xFF); 401ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik pix_ptr++; 402ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 403ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 404ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 405ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik if (alpha) /* read alpha-channel from pgm file */ 406ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 407ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik if (alpha_raw) 408ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik *pix_ptr++ = get_data (alpha_file, alpha_depth); 409893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project else 410ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik if (alpha_depth <= 8) 411ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik *pix_ptr++ = get_value (alpha_file, bit_depth); 412ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik else 413ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 414ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik tmp16 = get_value (alpha_file, bit_depth); 415ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik *pix_ptr++ = (png_byte) ((tmp16 >> 8) & 0xFF); 416ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik *pix_ptr++ = (png_byte) (tmp16 & 0xFF); 417ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 418ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } /* if alpha */ 419ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } /* if packed_bitmap */ 420893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project } /* end for col */ 421893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project } /* end for row */ 422893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 423893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project /* prepare the standard PNG structures */ 424893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_ptr = png_create_write_struct (PNG_LIBPNG_VER_STRING, NULL, NULL, NULL); 425893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if (!png_ptr) 426893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project { 427893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project return FALSE; 428893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project } 429893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project info_ptr = png_create_info_struct (png_ptr); 430893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if (!info_ptr) 431893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project { 432893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_destroy_write_struct (&png_ptr, (png_infopp) NULL); 433893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project return FALSE; 434893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project } 435893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 436ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik#if defined(PNG_WRITE_INVERT_SUPPORTED) || defined(PNG_WRITE_PACK_SUPPORTED) 437ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik if (packed_bitmap == TRUE) 438ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 439ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik png_set_packing (png_ptr); 440ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik png_set_invert_mono (png_ptr); 441ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 442ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik#endif 443ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik 444893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project /* setjmp() must be called in every function that calls a PNG-reading libpng function */ 445893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if (setjmp (png_jmpbuf(png_ptr))) 446893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project { 447893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_destroy_write_struct (&png_ptr, (png_infopp) NULL); 448893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project return FALSE; 449893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project } 450893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 451893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project /* initialize the png structure */ 452893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_init_io (png_ptr, png_file); 453893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 454893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project /* we're going to write more or less the same PNG as the input file */ 455893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_set_IHDR (png_ptr, info_ptr, width, height, bit_depth, color_type, 456893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project (!interlace) ? PNG_INTERLACE_NONE : PNG_INTERLACE_ADAM7, 457893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE); 458893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 459893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project /* write the file header information */ 460893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_write_info (png_ptr, info_ptr); 461893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 462893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project /* if needed we will allocate memory for an new array of row-pointers */ 463893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if (row_pointers == (unsigned char**) NULL) 464893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project { 465893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if ((row_pointers = (png_byte **) malloc (height * sizeof (png_bytep))) == NULL) 466893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project { 467893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_destroy_write_struct (&png_ptr, (png_infopp) NULL); 468893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project return FALSE; 469893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project } 470893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project } 471893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 472893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project /* set the individual row_pointers to point at the correct offsets */ 473893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project for (i = 0; i < (height); i++) 474893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project row_pointers[i] = png_pixels + i * row_bytes; 475893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 476893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project /* write out the entire image data in one call */ 477893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_write_image (png_ptr, row_pointers); 478893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 479893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project /* write the additional chuncks to the PNG file (not really needed) */ 480893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_write_end (png_ptr, info_ptr); 481893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 482893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project /* clean up after the write, and free any memory allocated */ 483893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_destroy_write_struct (&png_ptr, (png_infopp) NULL); 484893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 485893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if (row_pointers != (unsigned char**) NULL) 486893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project free (row_pointers); 487893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if (png_pixels != (unsigned char*) NULL) 488893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project free (png_pixels); 489893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 490893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project return TRUE; 491893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project} /* end of pnm2png */ 492893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 493893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* 494893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * get_token() - gets the first string after whitespace 495893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project */ 496893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 497893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectvoid get_token(FILE *pnm_file, char *token) 498893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project{ 499893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project int i = 0; 500ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik int ret; 501893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 502ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik /* remove white-space and comment lines */ 503893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project do 504893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project { 505ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik ret = fgetc(pnm_file); 506ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik if (ret == '#') { 507ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik /* the rest of this line is a comment */ 508ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik do 509ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik { 510ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik ret = fgetc(pnm_file); 511ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 512ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik while ((ret != '\n') && (ret != '\r') && (ret != EOF)); 513ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik } 514ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik if (ret == EOF) break; 515ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik token[i] = (unsigned char) ret; 516893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project } 517893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project while ((token[i] == '\n') || (token[i] == '\r') || (token[i] == ' ')); 518893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 519893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project /* read string */ 520893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project do 521893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project { 522ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik ret = fgetc(pnm_file); 523ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik if (ret == EOF) break; 524893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project i++; 525ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik token[i] = (unsigned char) ret; 526893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project } 527893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project while ((token[i] != '\n') && (token[i] != '\r') && (token[i] != ' ')); 528893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 529893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project token[i] = '\0'; 530893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 531893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project return; 532893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project} 533893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 534893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* 535893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * get_data() - takes first byte and converts into next pixel value, 536893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * taking as much bits as defined by bit-depth and 537893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * using the bit-depth to fill up a byte (0Ah -> AAh) 538893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project */ 539893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 540893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_uint_32 get_data (FILE *pnm_file, int depth) 541893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project{ 542893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project static int bits_left = 0; 543893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project static int old_value = 0; 544893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project static int mask = 0; 545893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project int i; 546893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_uint_32 ret_value; 547893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 548893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if (mask == 0) 549893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project for (i = 0; i < depth; i++) 550893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project mask = (mask >> 1) | 0x80; 551893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 552893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if (bits_left <= 0) 553893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project { 554893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project old_value = fgetc (pnm_file); 555893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project bits_left = 8; 556893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project } 557893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 558893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project ret_value = old_value & mask; 559893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project for (i = 1; i < (8 / depth); i++) 560893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project ret_value = ret_value || (ret_value >> depth); 561893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 562893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project old_value = (old_value << depth) & 0xFF; 563893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project bits_left -= depth; 564893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 565893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project return ret_value; 566893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project} 567893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 568893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* 569893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * get_value() - takes first (numeric) string and converts into number, 570893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * using the bit-depth to fill up a byte (0Ah -> AAh) 571893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project */ 572893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 573893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_uint_32 get_value (FILE *pnm_file, int depth) 574893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project{ 575893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project static png_uint_32 mask = 0; 576893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_byte token[16]; 577ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik unsigned long ul_ret_value; 578893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_uint_32 ret_value; 579893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project int i = 0; 580893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 581893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if (mask == 0) 582893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project for (i = 0; i < depth; i++) 583893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project mask = (mask << 1) | 0x01; 584893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 585893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project get_token (pnm_file, (char *) token); 586ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik sscanf ((const char *) token, "%lu", &ul_ret_value); 587ca2bf81b02c99afa2e76b3b2c6eb232c239221e0Chris Craik ret_value = (png_uint_32) ul_ret_value; 588893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 589893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project ret_value &= mask; 590893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 591893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if (depth < 8) 592893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project for (i = 0; i < (8 / depth); i++) 593893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project ret_value = (ret_value << depth) || ret_value; 594893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 595893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project return ret_value; 596893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project} 597893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 598893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* end of source */ 599893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 600