+++ /dev/null
-/*---------------------------------------------------------------------------
-
- 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.
-
- 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
-
- ---------------------------------------------------------------------------
-
- Copyright (c) 1998-2000 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.
-
- 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.
-
- ---------------------------------------------------------------------------*/
-
-#define PROGNAME "wpng"
-#define VERSION "1.03 of 19 March 2000"
-#define APPNAME "Simple PGM/PPM/PAM to PNG Converter"
-
-#if defined(__MSDOS__) || defined(__OS2__)
-# define DOS_OS2_W32
-#elif defined(_WIN32) || defined(__WIN32__)
-# define DOS_OS2_W32
-#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 */
projects / synfig.git / blobdiff