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Diffstat (limited to 'contrib/gregbook/wpng.c')
| -rw-r--r-- | contrib/gregbook/wpng.c | 853 |
1 files changed, 0 insertions, 853 deletions
diff --git a/contrib/gregbook/wpng.c b/contrib/gregbook/wpng.c deleted file mode 100644 index a06e352..0000000 --- a/contrib/gregbook/wpng.c +++ /dev/null @@ -1,853 +0,0 @@ -/*--------------------------------------------------------------------------- - - wpng - simple PNG-writing program wpng.c - - This program converts certain NetPBM binary files (grayscale and RGB, - maxval = 255) to PNG. Non-interlaced PNGs are written progressively; - interlaced PNGs are read and written in one memory-intensive blast. - - Thanks to Jean-loup Gailly for providing the necessary trick to read - interactive text from the keyboard while stdin is redirected. Thanks - to Cosmin Truta for Cygwin fixes. - - NOTE: includes provisional support for PNM type "8" (portable alphamap) - images, presumed to be a 32-bit interleaved RGBA format; no pro- - vision for possible interleaved grayscale+alpha (16-bit) format. - THIS IS UNLIKELY TO BECOME AN OFFICIAL NETPBM ALPHA FORMAT! - - to do: - - delete output file if quit before calling any writepng routines - - process backspace with -text option under DOS/Win? (currently get ^H) - - --------------------------------------------------------------------------- - - Changelog: - - 1.01: initial public release - - 1.02: modified to allow abbreviated options - - 1.03: removed extraneous character from usage screen; fixed bug in - command-line parsing - - 1.04: fixed DOS/OS2/Win32 detection, including partial Cygwin fix - (see http://home.att.net/~perlspinr/diffs/GregBook_cygwin.diff) - - 2.00: dual-licensed (added GNU GPL) - - [REPORTED BUG (win32 only): "contrib/gregbook/wpng.c - cmd line - dose not work! In order to do something useful I needed to redirect - both input and output, with cygwin and with bcc32 as well. Under - Linux, the same wpng appears to work fine. I don't know what is - the problem."] - - --------------------------------------------------------------------------- - - Copyright (c) 1998-2007 Greg Roelofs. All rights reserved. - - This software is provided "as is," without warranty of any kind, - express or implied. In no event shall the author or contributors - be held liable for any damages arising in any way from the use of - this software. - - The contents of this file are DUAL-LICENSED. You may modify and/or - redistribute this software according to the terms of one of the - following two licenses (at your option): - - - LICENSE 1 ("BSD-like with advertising clause"): - - Permission is granted to anyone to use this software for any purpose, - including commercial applications, and to alter it and redistribute - it freely, subject to the following restrictions: - - 1. Redistributions of source code must retain the above copyright - notice, disclaimer, and this list of conditions. - 2. Redistributions in binary form must reproduce the above copyright - notice, disclaimer, and this list of conditions in the documenta- - tion and/or other materials provided with the distribution. - 3. All advertising materials mentioning features or use of this - software must display the following acknowledgment: - - This product includes software developed by Greg Roelofs - and contributors for the book, "PNG: The Definitive Guide," - published by O'Reilly and Associates. - - - LICENSE 2 (GNU GPL v2 or later): - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software Foundation, - Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - - ---------------------------------------------------------------------------*/ - -#define PROGNAME "wpng" -#define VERSION "2.00 of 2 June 2007" -#define APPNAME "Simple PGM/PPM/PAM to PNG Converter" - -#if defined(__MSDOS__) || defined(__OS2__) -# define DOS_OS2_W32 -#elif defined(WIN32) || defined(_WIN32) || defined(__WIN32__) -# ifndef __GNUC__ /* treat Win32 native ports of gcc as Unix environments */ -# define DOS_OS2_W32 -# endif -#endif - -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <setjmp.h> /* for jmpbuf declaration in writepng.h */ -#include <time.h> - -#ifdef DOS_OS2_W32 -# include <io.h> /* for isatty(), setmode() prototypes */ -# include <fcntl.h> /* O_BINARY for fdopen() without text translation */ -# ifdef __EMX__ -# ifndef getch -# define getch() _read_kbd(0, 1, 0) /* need getche() */ -# endif -# else /* !__EMX__ */ -# ifdef __GO32__ -# include <pc.h> -# define getch() getkey() /* GRR: need getche() */ -# else -# include <conio.h> /* for getche() console input */ -# endif -# endif /* ?__EMX__ */ -# define FGETS(buf,len,stream) dos_kbd_gets(buf,len) -#else -# include <unistd.h> /* for isatty() prototype */ -# define FGETS fgets -#endif - -/* #define DEBUG : this enables the Trace() macros */ - -/* #define FORBID_LATIN1_CTRL : this requires the user to re-enter any - text that includes control characters discouraged by the PNG spec; text - that includes an escape character (27) must be re-entered regardless */ - -#include "writepng.h" /* typedefs, common macros, writepng prototypes */ - - - -/* local prototypes */ - -static int wpng_isvalid_latin1(uch *p, int len); -static void wpng_cleanup(void); - -#ifdef DOS_OS2_W32 - static char *dos_kbd_gets(char *buf, int len); -#endif - - - -static mainprog_info wpng_info; /* lone global */ - - - -int main(int argc, char **argv) -{ -#ifndef DOS_OS2_W32 - FILE *keybd; -#endif -#ifdef sgi - FILE *tmpfile; /* or we could just use keybd, since no overlap */ - char tmpline[80]; -#endif - char *inname = NULL, outname[256]; - char *p, pnmchar, pnmline[256]; - char *bgstr, *textbuf = NULL; - ulg rowbytes; - int rc, len = 0; - int error = 0; - int text = FALSE; - int maxval; - double LUT_exponent; /* just the lookup table */ - double CRT_exponent = 2.2; /* just the monitor */ - double default_display_exponent; /* whole display system */ - double default_gamma = 0.0; - - - wpng_info.infile = NULL; - wpng_info.outfile = NULL; - wpng_info.image_data = NULL; - wpng_info.row_pointers = NULL; - wpng_info.filter = FALSE; - wpng_info.interlaced = FALSE; - wpng_info.have_bg = FALSE; - wpng_info.have_time = FALSE; - wpng_info.have_text = 0; - wpng_info.gamma = 0.0; - - - /* First get the default value for our display-system exponent, i.e., - * the product of the CRT exponent and the exponent corresponding to - * the frame-buffer's lookup table (LUT), if any. If the PNM image - * looks correct on the user's display system, its file gamma is the - * inverse of this value. (Note that this is not an exhaustive list - * of LUT values--e.g., OpenStep has a lot of weird ones--but it should - * cover 99% of the current possibilities. This section must ensure - * that default_display_exponent is positive.) */ - -#if defined(NeXT) - /* third-party utilities can modify the default LUT exponent */ - LUT_exponent = 1.0 / 2.2; - /* - if (some_next_function_that_returns_gamma(&next_gamma)) - LUT_exponent = 1.0 / next_gamma; - */ -#elif defined(sgi) - LUT_exponent = 1.0 / 1.7; - /* there doesn't seem to be any documented function to - * get the "gamma" value, so we do it the hard way */ - tmpfile = fopen("/etc/config/system.glGammaVal", "r"); - if (tmpfile) { - double sgi_gamma; - - fgets(tmpline, 80, tmpfile); - fclose(tmpfile); - sgi_gamma = atof(tmpline); - if (sgi_gamma > 0.0) - LUT_exponent = 1.0 / sgi_gamma; - } -#elif defined(Macintosh) - LUT_exponent = 1.8 / 2.61; - /* - if (some_mac_function_that_returns_gamma(&mac_gamma)) - LUT_exponent = mac_gamma / 2.61; - */ -#else - LUT_exponent = 1.0; /* assume no LUT: most PCs */ -#endif - - /* the defaults above give 1.0, 1.3, 1.5 and 2.2, respectively: */ - default_display_exponent = LUT_exponent * CRT_exponent; - - - /* If the user has set the SCREEN_GAMMA environment variable as suggested - * (somewhat imprecisely) in the libpng documentation, use that; otherwise - * use the default value we just calculated. Either way, the user may - * override this via a command-line option. */ - - if ((p = getenv("SCREEN_GAMMA")) != NULL) { - double exponent = atof(p); - - if (exponent > 0.0) - default_gamma = 1.0 / exponent; - } - - if (default_gamma == 0.0) - default_gamma = 1.0 / default_display_exponent; - - - /* Now parse the command line for options and the PNM filename. */ - - while (*++argv && !error) { - if (!strncmp(*argv, "-i", 2)) { - wpng_info.interlaced = TRUE; - } else if (!strncmp(*argv, "-time", 3)) { - wpng_info.modtime = time(NULL); - wpng_info.have_time = TRUE; - } else if (!strncmp(*argv, "-text", 3)) { - text = TRUE; - } else if (!strncmp(*argv, "-gamma", 2)) { - if (!*++argv) - ++error; - else { - wpng_info.gamma = atof(*argv); - if (wpng_info.gamma <= 0.0) - ++error; - else if (wpng_info.gamma > 1.01) - fprintf(stderr, PROGNAME - " warning: file gammas are usually less than 1.0\n"); - } - } else if (!strncmp(*argv, "-bgcolor", 4)) { - if (!*++argv) - ++error; - else { - bgstr = *argv; - if (strlen(bgstr) != 7 || bgstr[0] != '#') - ++error; - else { - unsigned r, g, b; /* this way quiets compiler warnings */ - - sscanf(bgstr+1, "%2x%2x%2x", &r, &g, &b); - wpng_info.bg_red = (uch)r; - wpng_info.bg_green = (uch)g; - wpng_info.bg_blue = (uch)b; - wpng_info.have_bg = TRUE; - } - } - } else { - if (**argv != '-') { - inname = *argv; - if (argv[1]) /* shouldn't be any more args after filename */ - ++error; - } else - ++error; /* not expecting any other options */ - } - } - - - /* open the input and output files, or register an error and abort */ - - if (!inname) { - if (isatty(0)) { - fprintf(stderr, PROGNAME - ": must give input filename or provide image data via stdin\n"); - ++error; - } else { -#ifdef DOS_OS2_W32 - /* some buggy C libraries require BOTH setmode() and fdopen(bin) */ - setmode(fileno(stdin), O_BINARY); - setmode(fileno(stdout), O_BINARY); -#endif - if ((wpng_info.infile = fdopen(fileno(stdin), "rb")) == NULL) { - fprintf(stderr, PROGNAME - ": unable to reopen stdin in binary mode\n"); - ++error; - } else - if ((wpng_info.outfile = fdopen(fileno(stdout), "wb")) == NULL) { - fprintf(stderr, PROGNAME - ": unable to reopen stdout in binary mode\n"); - fclose(wpng_info.infile); - ++error; - } else - wpng_info.filter = TRUE; - } - } else if ((len = strlen(inname)) > 250) { - fprintf(stderr, PROGNAME ": input filename is too long [%d chars]\n", - len); - ++error; - } else if (!(wpng_info.infile = fopen(inname, "rb"))) { - fprintf(stderr, PROGNAME ": can't open input file [%s]\n", inname); - ++error; - } - - if (!error) { - fgets(pnmline, 256, wpng_info.infile); - if (pnmline[0] != 'P' || ((pnmchar = pnmline[1]) != '5' && - pnmchar != '6' && pnmchar != '8')) - { - fprintf(stderr, PROGNAME - ": input file [%s] is not a binary PGM, PPM or PAM file\n", - inname); - ++error; - } else { - wpng_info.pnmtype = (int)(pnmchar - '0'); - if (wpng_info.pnmtype != 8) - wpng_info.have_bg = FALSE; /* no need for bg if opaque */ - do { - fgets(pnmline, 256, wpng_info.infile); /* lose any comments */ - } while (pnmline[0] == '#'); - sscanf(pnmline, "%ld %ld", &wpng_info.width, &wpng_info.height); - do { - fgets(pnmline, 256, wpng_info.infile); /* more comment lines */ - } while (pnmline[0] == '#'); - sscanf(pnmline, "%d", &maxval); - if (wpng_info.width <= 0L || wpng_info.height <= 0L || - maxval != 255) - { - fprintf(stderr, PROGNAME - ": only positive width/height, maxval == 255 allowed \n"); - ++error; - } - wpng_info.sample_depth = 8; /* <==> maxval 255 */ - - if (!wpng_info.filter) { - /* make outname from inname */ - if ((p = strrchr(inname, '.')) == NULL || - (p - inname) != (len - 4)) - { - strcpy(outname, inname); - strcpy(outname+len, ".png"); - } else { - len -= 4; - strncpy(outname, inname, len); - strcpy(outname+len, ".png"); - } - /* check if outname already exists; if not, open */ - if ((wpng_info.outfile = fopen(outname, "rb")) != NULL) { - fprintf(stderr, PROGNAME ": output file exists [%s]\n", - outname); - fclose(wpng_info.outfile); - ++error; - } else if (!(wpng_info.outfile = fopen(outname, "wb"))) { - fprintf(stderr, PROGNAME ": can't open output file [%s]\n", - outname); - ++error; - } - } - } - if (error) { - fclose(wpng_info.infile); - wpng_info.infile = NULL; - if (wpng_info.filter) { - fclose(wpng_info.outfile); - wpng_info.outfile = NULL; - } - } - } - - - /* if we had any errors, print usage and die horrible death...arrr! */ - - if (error) { - fprintf(stderr, "\n%s %s: %s\n", PROGNAME, VERSION, APPNAME); - writepng_version_info(); - fprintf(stderr, "\n" -"Usage: %s [-gamma exp] [-bgcolor bg] [-text] [-time] [-interlace] pnmfile\n" -"or: ... | %s [-gamma exp] [-bgcolor bg] [-text] [-time] [-interlace] | ...\n" - " exp \ttransfer-function exponent (``gamma'') of the image in\n" - "\t\t floating-point format (e.g., ``%.5f''); if image looks\n" - "\t\t correct on given display system, image gamma is equal to\n" - "\t\t inverse of display-system exponent, i.e., 1 / (LUT * CRT)\n" - "\t\t (where LUT = lookup-table exponent and CRT = CRT exponent;\n" - "\t\t first varies, second is usually 2.2, all are positive)\n" - " bg \tdesired background color for alpha-channel images, in\n" - "\t\t 7-character hex RGB format (e.g., ``#ff7700'' for orange:\n" - "\t\t same as HTML colors)\n" - " -text\tprompt interactively for text info (tEXt chunks)\n" - " -time\tinclude a tIME chunk (last modification time)\n" - " -interlace\twrite interlaced PNG image\n" - "\n" -"pnmfile or stdin must be a binary PGM (`P5'), PPM (`P6') or (extremely\n" -"unofficial and unsupported!) PAM (`P8') file. Currently it is required\n" -"to have maxval == 255 (i.e., no scaling). If pnmfile is specified, it\n" -"is converted to the corresponding PNG file with the same base name but a\n" -"``.png'' extension; files read from stdin are converted and sent to stdout.\n" -"The conversion is progressive (low memory usage) unless interlacing is\n" -"requested; in that case the whole image will be buffered in memory and\n" -"written in one call.\n" - "\n", PROGNAME, PROGNAME, default_gamma); - exit(1); - } - - - /* prepare the text buffers for libpng's use; note that even though - * PNG's png_text struct includes a length field, we don't have to fill - * it out */ - - if (text && -#ifndef DOS_OS2_W32 - (keybd = fdopen(fileno(stderr), "r")) != NULL && -#endif - (textbuf = (char *)malloc((5 + 9)*75)) != NULL) - { - int i, valid, result; - - fprintf(stderr, - "Enter text info (no more than 72 characters per line);\n"); - fprintf(stderr, "to skip a field, hit the <Enter> key.\n"); - /* note: just <Enter> leaves len == 1 */ - - do { - valid = TRUE; - p = textbuf + TEXT_TITLE_OFFSET; - fprintf(stderr, " Title: "); - fflush(stderr); - if (FGETS(p, 74, keybd) && (len = strlen(p)) > 1) { - if (p[len-1] == '\n') - p[--len] = '\0'; - wpng_info.title = p; - wpng_info.have_text |= TEXT_TITLE; - if ((result = wpng_isvalid_latin1((uch *)p, len)) >= 0) { - fprintf(stderr, " " PROGNAME " warning: character code" - " %u is %sdiscouraged by the PNG\n specification " - "[first occurrence was at character position #%d]\n", - (unsigned)p[result], (p[result] == 27)? "strongly " : "", - result+1); - fflush(stderr); -#ifdef FORBID_LATIN1_CTRL - wpng_info.have_text &= ~TEXT_TITLE; - valid = FALSE; -#else - if (p[result] == 27) { /* escape character */ - wpng_info.have_text &= ~TEXT_TITLE; - valid = FALSE; - } -#endif - } - } - } while (!valid); - - do { - valid = TRUE; - p = textbuf + TEXT_AUTHOR_OFFSET; - fprintf(stderr, " Author: "); - fflush(stderr); - if (FGETS(p, 74, keybd) && (len = strlen(p)) > 1) { - if (p[len-1] == '\n') - p[--len] = '\0'; - wpng_info.author = p; - wpng_info.have_text |= TEXT_AUTHOR; - if ((result = wpng_isvalid_latin1((uch *)p, len)) >= 0) { - fprintf(stderr, " " PROGNAME " warning: character code" - " %u is %sdiscouraged by the PNG\n specification " - "[first occurrence was at character position #%d]\n", - (unsigned)p[result], (p[result] == 27)? "strongly " : "", - result+1); - fflush(stderr); -#ifdef FORBID_LATIN1_CTRL - wpng_info.have_text &= ~TEXT_AUTHOR; - valid = FALSE; -#else - if (p[result] == 27) { /* escape character */ - wpng_info.have_text &= ~TEXT_AUTHOR; - valid = FALSE; - } -#endif - } - } - } while (!valid); - - do { - valid = TRUE; - p = textbuf + TEXT_DESC_OFFSET; - fprintf(stderr, " Description (up to 9 lines):\n"); - for (i = 1; i < 10; ++i) { - fprintf(stderr, " [%d] ", i); - fflush(stderr); - if (FGETS(p, 74, keybd) && (len = strlen(p)) > 1) - p += len; /* now points at NULL; char before is newline */ - else - break; - } - if ((len = p - (textbuf + TEXT_DESC_OFFSET)) > 1) { - if (p[-1] == '\n') { - p[-1] = '\0'; - --len; - } - wpng_info.desc = textbuf + TEXT_DESC_OFFSET; - wpng_info.have_text |= TEXT_DESC; - p = textbuf + TEXT_DESC_OFFSET; - if ((result = wpng_isvalid_latin1((uch *)p, len)) >= 0) { - fprintf(stderr, " " PROGNAME " warning: character code" - " %u is %sdiscouraged by the PNG\n specification " - "[first occurrence was at character position #%d]\n", - (unsigned)p[result], (p[result] == 27)? "strongly " : "", - result+1); - fflush(stderr); -#ifdef FORBID_LATIN1_CTRL - wpng_info.have_text &= ~TEXT_DESC; - valid = FALSE; -#else - if (p[result] == 27) { /* escape character */ - wpng_info.have_text &= ~TEXT_DESC; - valid = FALSE; - } -#endif - } - } - } while (!valid); - - do { - valid = TRUE; - p = textbuf + TEXT_COPY_OFFSET; - fprintf(stderr, " Copyright: "); - fflush(stderr); - if (FGETS(p, 74, keybd) && (len = strlen(p)) > 1) { - if (p[len-1] == '\n') - p[--len] = '\0'; - wpng_info.copyright = p; - wpng_info.have_text |= TEXT_COPY; - if ((result = wpng_isvalid_latin1((uch *)p, len)) >= 0) { - fprintf(stderr, " " PROGNAME " warning: character code" - " %u is %sdiscouraged by the PNG\n specification " - "[first occurrence was at character position #%d]\n", - (unsigned)p[result], (p[result] == 27)? "strongly " : "", - result+1); - fflush(stderr); -#ifdef FORBID_LATIN1_CTRL - wpng_info.have_text &= ~TEXT_COPY; - valid = FALSE; -#else - if (p[result] == 27) { /* escape character */ - wpng_info.have_text &= ~TEXT_COPY; - valid = FALSE; - } -#endif - } - } - } while (!valid); - - do { - valid = TRUE; - p = textbuf + TEXT_EMAIL_OFFSET; - fprintf(stderr, " E-mail: "); - fflush(stderr); - if (FGETS(p, 74, keybd) && (len = strlen(p)) > 1) { - if (p[len-1] == '\n') - p[--len] = '\0'; - wpng_info.email = p; - wpng_info.have_text |= TEXT_EMAIL; - if ((result = wpng_isvalid_latin1((uch *)p, len)) >= 0) { - fprintf(stderr, " " PROGNAME " warning: character code" - " %u is %sdiscouraged by the PNG\n specification " - "[first occurrence was at character position #%d]\n", - (unsigned)p[result], (p[result] == 27)? "strongly " : "", - result+1); - fflush(stderr); -#ifdef FORBID_LATIN1_CTRL - wpng_info.have_text &= ~TEXT_EMAIL; - valid = FALSE; -#else - if (p[result] == 27) { /* escape character */ - wpng_info.have_text &= ~TEXT_EMAIL; - valid = FALSE; - } -#endif - } - } - } while (!valid); - - do { - valid = TRUE; - p = textbuf + TEXT_URL_OFFSET; - fprintf(stderr, " URL: "); - fflush(stderr); - if (FGETS(p, 74, keybd) && (len = strlen(p)) > 1) { - if (p[len-1] == '\n') - p[--len] = '\0'; - wpng_info.url = p; - wpng_info.have_text |= TEXT_URL; - if ((result = wpng_isvalid_latin1((uch *)p, len)) >= 0) { - fprintf(stderr, " " PROGNAME " warning: character code" - " %u is %sdiscouraged by the PNG\n specification " - "[first occurrence was at character position #%d]\n", - (unsigned)p[result], (p[result] == 27)? "strongly " : "", - result+1); - fflush(stderr); -#ifdef FORBID_LATIN1_CTRL - wpng_info.have_text &= ~TEXT_URL; - valid = FALSE; -#else - if (p[result] == 27) { /* escape character */ - wpng_info.have_text &= ~TEXT_URL; - valid = FALSE; - } -#endif - } - } - } while (!valid); - -#ifndef DOS_OS2_W32 - fclose(keybd); -#endif - - } else if (text) { - fprintf(stderr, PROGNAME ": unable to allocate memory for text\n"); - text = FALSE; - wpng_info.have_text = 0; - } - - - /* allocate libpng stuff, initialize transformations, write pre-IDAT data */ - - if ((rc = writepng_init(&wpng_info)) != 0) { - switch (rc) { - case 2: - fprintf(stderr, PROGNAME - ": libpng initialization problem (longjmp)\n"); - break; - case 4: - fprintf(stderr, PROGNAME ": insufficient memory\n"); - break; - case 11: - fprintf(stderr, PROGNAME - ": internal logic error (unexpected PNM type)\n"); - break; - default: - fprintf(stderr, PROGNAME - ": unknown writepng_init() error\n"); - break; - } - exit(rc); - } - - - /* free textbuf, since it's a completely local variable and all text info - * has just been written to the PNG file */ - - if (text && textbuf) { - free(textbuf); - textbuf = NULL; - } - - - /* calculate rowbytes on basis of image type; note that this becomes much - * more complicated if we choose to support PBM type, ASCII PNM types, or - * 16-bit-per-sample binary data [currently not an official NetPBM type] */ - - if (wpng_info.pnmtype == 5) - rowbytes = wpng_info.width; - else if (wpng_info.pnmtype == 6) - rowbytes = wpng_info.width * 3; - else /* if (wpng_info.pnmtype == 8) */ - rowbytes = wpng_info.width * 4; - - - /* read and write the image, either in its entirety (if writing interlaced - * PNG) or row by row (if non-interlaced) */ - - fprintf(stderr, "Encoding image data...\n"); - fflush(stderr); - - if (wpng_info.interlaced) { - long i; - ulg bytes; - ulg image_bytes = rowbytes * wpng_info.height; /* overflow? */ - - wpng_info.image_data = (uch *)malloc(image_bytes); - wpng_info.row_pointers = (uch **)malloc(wpng_info.height*sizeof(uch *)); - if (wpng_info.image_data == NULL || wpng_info.row_pointers == NULL) { - fprintf(stderr, PROGNAME ": insufficient memory for image data\n"); - writepng_cleanup(&wpng_info); - wpng_cleanup(); - exit(5); - } - for (i = 0; i < wpng_info.height; ++i) - wpng_info.row_pointers[i] = wpng_info.image_data + i*rowbytes; - bytes = fread(wpng_info.image_data, 1, image_bytes, wpng_info.infile); - if (bytes != image_bytes) { - fprintf(stderr, PROGNAME ": expected %lu bytes, got %lu bytes\n", - image_bytes, bytes); - fprintf(stderr, " (continuing anyway)\n"); - } - if (writepng_encode_image(&wpng_info) != 0) { - fprintf(stderr, PROGNAME - ": libpng problem (longjmp) while writing image data\n"); - writepng_cleanup(&wpng_info); - wpng_cleanup(); - exit(2); - } - - } else /* not interlaced: write progressively (row by row) */ { - long j; - ulg bytes; - - wpng_info.image_data = (uch *)malloc(rowbytes); - if (wpng_info.image_data == NULL) { - fprintf(stderr, PROGNAME ": insufficient memory for row data\n"); - writepng_cleanup(&wpng_info); - wpng_cleanup(); - exit(5); - } - error = 0; - for (j = wpng_info.height; j > 0L; --j) { - bytes = fread(wpng_info.image_data, 1, rowbytes, wpng_info.infile); - if (bytes != rowbytes) { - fprintf(stderr, PROGNAME - ": expected %lu bytes, got %lu bytes (row %ld)\n", rowbytes, - bytes, wpng_info.height-j); - ++error; - break; - } - if (writepng_encode_row(&wpng_info) != 0) { - fprintf(stderr, PROGNAME - ": libpng problem (longjmp) while writing row %ld\n", - wpng_info.height-j); - ++error; - break; - } - } - if (error) { - writepng_cleanup(&wpng_info); - wpng_cleanup(); - exit(2); - } - if (writepng_encode_finish(&wpng_info) != 0) { - fprintf(stderr, PROGNAME ": error on final libpng call\n"); - writepng_cleanup(&wpng_info); - wpng_cleanup(); - exit(2); - } - } - - - /* OK, we're done (successfully): clean up all resources and quit */ - - fprintf(stderr, "Done.\n"); - fflush(stderr); - - writepng_cleanup(&wpng_info); - wpng_cleanup(); - - return 0; -} - - - - - -static int wpng_isvalid_latin1(uch *p, int len) -{ - int i, result = -1; - - for (i = 0; i < len; ++i) { - if (p[i] == 10 || (p[i] > 31 && p[i] < 127) || p[i] > 160) - continue; /* character is completely OK */ - if (result < 0 || (p[result] != 27 && p[i] == 27)) - result = i; /* mark location of first questionable one */ - } /* or of first escape character (bad) */ - - return result; -} - - - - - -static void wpng_cleanup(void) -{ - if (wpng_info.outfile) { - fclose(wpng_info.outfile); - wpng_info.outfile = NULL; - } - - if (wpng_info.infile) { - fclose(wpng_info.infile); - wpng_info.infile = NULL; - } - - if (wpng_info.image_data) { - free(wpng_info.image_data); - wpng_info.image_data = NULL; - } - - if (wpng_info.row_pointers) { - free(wpng_info.row_pointers); - wpng_info.row_pointers = NULL; - } -} - - - - -#ifdef DOS_OS2_W32 - -static char *dos_kbd_gets(char *buf, int len) -{ - int ch, count=0; - - do { - buf[count++] = ch = getche(); - } while (ch != '\r' && count < len-1); - - buf[count--] = '\0'; /* terminate string */ - if (buf[count] == '\r') /* Enter key makes CR, so change to newline */ - buf[count] = '\n'; - - fprintf(stderr, "\n"); /* Enter key does *not* cause a newline */ - fflush(stderr); - - return buf; -} - -#endif /* DOS_OS2_W32 */ |