X-Git-Url: https://git.pterodactylus.net/?a=blobdiff_plain;f=gtkmm-osx%2Ftrunk%2Flibpng-1.2.5%2Fcontrib%2Fpngminus%2Fpng2pnm.c;fp=gtkmm-osx%2Ftrunk%2Flibpng-1.2.5%2Fcontrib%2Fpngminus%2Fpng2pnm.c;h=0000000000000000000000000000000000000000;hb=a095981e18cc37a8ecc7cd237cc22b9c10329264;hp=010870a766a4b90a36a1e397f13e946c2e68b075;hpb=9459638ad6797b8139f1e9f0715c96076dbf0890;p=synfig.git diff --git a/gtkmm-osx/trunk/libpng-1.2.5/contrib/pngminus/png2pnm.c b/gtkmm-osx/trunk/libpng-1.2.5/contrib/pngminus/png2pnm.c deleted file mode 100644 index 010870a..0000000 --- a/gtkmm-osx/trunk/libpng-1.2.5/contrib/pngminus/png2pnm.c +++ /dev/null @@ -1,430 +0,0 @@ -/* - * png2pnm.c --- conversion from PNG-file to PGM/PPM-file - * copyright (C) 1999 by Willem van Schaik - * - * version 1.0 - 1999.10.15 - First version. - * - * Permission to use, copy, modify, and distribute this software and - * its documentation for any purpose and without fee is hereby granted, - * provided that the above copyright notice appear in all copies and - * that both that copyright notice and this permission notice appear in - * supporting documentation. This software is provided "as is" without - * express or implied warranty. - */ - -#include -#include -#ifdef __TURBOC__ -#include -#include -#endif - -#ifndef BOOL -#define BOOL unsigned char -#endif -#ifndef TRUE -#define TRUE (BOOL) 1 -#endif -#ifndef FALSE -#define FALSE (BOOL) 0 -#endif - -#ifdef __TURBOC__ -#define STDIN 0 -#define STDOUT 1 -#define STDERR 2 -#endif - -/* to make png2pnm verbose so we can find problems (needs to be before png.h) */ -#ifndef PNG_DEBUG -#define PNG_DEBUG 0 -#endif - -#include "png.h" - -/* Define png_jmpbuf() in case we are using a pre-1.0.6 version of libpng */ -#ifndef png_jmpbuf -# define png_jmpbuf(png_ptr) ((png_ptr)->jmpbuf) -#endif - -/* function prototypes */ - -int main (int argc, char *argv[]); -void usage (); -BOOL png2pnm (FILE *png_file, FILE *pnm_file, FILE *alpha_file, BOOL raw, BOOL alpha); - -/* - * main - */ - -int main(int argc, char *argv[]) -{ - FILE *fp_rd = stdin; - FILE *fp_wr = stdout; - FILE *fp_al = NULL; - BOOL raw = TRUE; - BOOL alpha = FALSE; - int argi; - - for (argi = 1; argi < argc; argi++) - { - if (argv[argi][0] == '-') - { - switch (argv[argi][1]) - { - case 'n': - raw = FALSE; - break; - case 'r': - raw = TRUE; - break; - case 'a': - alpha = TRUE; - argi++; - if ((fp_al = fopen (argv[argi], "wb")) == NULL) - { - fprintf (stderr, "PNM2PNG\n"); - fprintf (stderr, "Error: can not create alpha-channel file %s\n", argv[argi]); - exit (1); - } - break; - case 'h': - case '?': - usage(); - exit(0); - break; - default: - fprintf (stderr, "PNG2PNM\n"); - fprintf (stderr, "Error: unknown option %s\n", argv[argi]); - usage(); - exit(1); - break; - } /* end switch */ - } - else if (fp_rd == stdin) - { - if ((fp_rd = fopen (argv[argi], "rb")) == NULL) - { - fprintf (stderr, "PNG2PNM\n"); - fprintf (stderr, "Error: file %s does not exist\n", argv[argi]); - exit (1); - } - } - else if (fp_wr == stdout) - { - if ((fp_wr = fopen (argv[argi], "wb")) == NULL) - { - fprintf (stderr, "PNG2PNM\n"); - fprintf (stderr, "Error: can not create file %s\n", argv[argi]); - exit (1); - } - } - else - { - fprintf (stderr, "PNG2PNM\n"); - fprintf (stderr, "Error: too many parameters\n"); - usage(); - exit(1); - } - } /* end for */ - -#ifdef __TURBOC__ - /* set stdin/stdout if required to binary */ - if (fp_rd == stdin) - { - setmode (STDIN, O_BINARY); - } - if ((raw) && (fp_wr == stdout)) - { - setmode (STDOUT, O_BINARY); - } -#endif - - /* call the conversion program itself */ - if (png2pnm (fp_rd, fp_wr, fp_al, raw, alpha) == FALSE) - { - fprintf (stderr, "PNG2PNM\n"); - fprintf (stderr, "Error: unsuccessful convertion of PNG-image\n"); - exit(1); - } - - /* close input file */ - fclose (fp_rd); - /* close output file */ - fclose (fp_wr); - /* close alpha file */ - if (alpha) - fclose (fp_al); - - return 0; -} - -/* - * usage - */ - -void usage() -{ - fprintf (stderr, "PNG2PNM\n"); - fprintf (stderr, " by Willem van Schaik, 1999\n"); -#ifdef __TURBOC__ - fprintf (stderr, " for Turbo-C and Borland-C compilers\n"); -#else - fprintf (stderr, " for Linux (and Unix) compilers\n"); -#endif - fprintf (stderr, "Usage: png2pnm [options] .png [.pnm]\n"); - fprintf (stderr, " or: ... | png2pnm [options]\n"); - fprintf (stderr, "Options:\n"); - fprintf (stderr, " -r[aw] write pnm-file in binary format (P4/P5/P6) (default)\n"); - fprintf (stderr, " -n[oraw] write pnm-file in ascii format (P1/P2/P3)\n"); - fprintf (stderr, " -a[lpha] .pgm write PNG alpha channel as pgm-file\n"); - fprintf (stderr, " -h | -? print this help-information\n"); -} - -/* - * png2pnm - */ - -BOOL png2pnm (FILE *png_file, FILE *pnm_file, FILE *alpha_file, BOOL raw, BOOL alpha) -{ - png_struct *png_ptr = NULL; - png_info *info_ptr = NULL; - png_byte buf[8]; - png_byte *png_pixels = NULL; - png_byte **row_pointers = NULL; - png_byte *pix_ptr = NULL; - png_uint_32 row_bytes; - - png_uint_32 width; - png_uint_32 height; - int bit_depth; - int channels; - int color_type; - int alpha_present; - int row, col; - int ret; - int i; - long dep_16; - - /* read and check signature in PNG file */ - ret = fread (buf, 1, 8, png_file); - if (ret != 8) - return FALSE; - - ret = png_check_sig (buf, 8); - if (!ret) - return FALSE; - - /* create png and info structures */ - - png_ptr = png_create_read_struct (PNG_LIBPNG_VER_STRING, - NULL, NULL, NULL); - if (!png_ptr) - return FALSE; /* out of memory */ - - info_ptr = png_create_info_struct (png_ptr); - if (!info_ptr) - { - png_destroy_read_struct (&png_ptr, NULL, NULL); - return FALSE; /* out of memory */ - } - - if (setjmp (png_jmpbuf(png_ptr))) - { - png_destroy_read_struct (&png_ptr, &info_ptr, NULL); - return FALSE; - } - - /* set up the input control for C streams */ - png_init_io (png_ptr, png_file); - png_set_sig_bytes (png_ptr, 8); /* we already read the 8 signature bytes */ - - /* read the file information */ - png_read_info (png_ptr, info_ptr); - - /* get size and bit-depth of the PNG-image */ - png_get_IHDR (png_ptr, info_ptr, - &width, &height, &bit_depth, &color_type, - NULL, NULL, NULL); - - /* set-up the transformations */ - - /* transform paletted images into full-color rgb */ - if (color_type == PNG_COLOR_TYPE_PALETTE) - png_set_expand (png_ptr); - /* expand images to bit-depth 8 (only applicable for grayscale images) */ - if (color_type == PNG_COLOR_TYPE_GRAY && bit_depth < 8) - png_set_expand (png_ptr); - /* transform transparency maps into full alpha-channel */ - if (png_get_valid (png_ptr, info_ptr, PNG_INFO_tRNS)) - png_set_expand (png_ptr); - -#ifdef NJET - /* downgrade 16-bit images to 8 bit */ - if (bit_depth == 16) - png_set_strip_16 (png_ptr); - /* transform grayscale images into full-color */ - if (color_type == PNG_COLOR_TYPE_GRAY || - color_type == PNG_COLOR_TYPE_GRAY_ALPHA) - png_set_gray_to_rgb (png_ptr); - /* only if file has a file gamma, we do a correction */ - if (png_get_gAMA (png_ptr, info_ptr, &file_gamma)) - png_set_gamma (png_ptr, (double) 2.2, file_gamma); -#endif - - /* all transformations have been registered; now update info_ptr data, - * get rowbytes and channels, and allocate image memory */ - - png_read_update_info (png_ptr, info_ptr); - - /* get the new color-type and bit-depth (after expansion/stripping) */ - png_get_IHDR (png_ptr, info_ptr, &width, &height, &bit_depth, &color_type, - NULL, NULL, NULL); - - /* check for 16-bit files */ - if (bit_depth == 16) - { - raw = FALSE; -#ifdef __TURBOC__ - pnm_file->flags &= ~((unsigned) _F_BIN); -#endif - } - - /* calculate new number of channels and store alpha-presence */ - if (color_type == PNG_COLOR_TYPE_GRAY) - channels = 1; - else if (color_type == PNG_COLOR_TYPE_GRAY_ALPHA) - channels = 2; - else if (color_type == PNG_COLOR_TYPE_RGB) - channels = 3; - else if (color_type == PNG_COLOR_TYPE_RGB_ALPHA) - channels = 4; - else - channels = 0; /* should never happen */ - alpha_present = (channels - 1) % 2; - - /* check if alpha is expected to be present in file */ - if (alpha && !alpha_present) - { - fprintf (stderr, "PNG2PNM\n"); - fprintf (stderr, "Error: PNG-file doesn't contain alpha channel\n"); - exit (1); - } - - /* row_bytes is the width x number of channels x (bit-depth / 8) */ - row_bytes = png_get_rowbytes (png_ptr, info_ptr); - - if ((png_pixels = (png_byte *) malloc (row_bytes * height * sizeof (png_byte))) == NULL) { - png_destroy_read_struct (&png_ptr, &info_ptr, NULL); - return FALSE; - } - - if ((row_pointers = (png_byte **) malloc (height * sizeof (png_bytep))) == NULL) - { - png_destroy_read_struct (&png_ptr, &info_ptr, NULL); - free (png_pixels); - png_pixels = NULL; - return FALSE; - } - - /* set the individual row_pointers to point at the correct offsets */ - for (i = 0; i < (height); i++) - row_pointers[i] = png_pixels + i * row_bytes; - - /* now we can go ahead and just read the whole image */ - png_read_image (png_ptr, row_pointers); - - /* read rest of file, and get additional chunks in info_ptr - REQUIRED */ - png_read_end (png_ptr, info_ptr); - - /* clean up after the read, and free any memory allocated - REQUIRED */ - png_destroy_read_struct (&png_ptr, &info_ptr, (png_infopp) NULL); - - /* write header of PNM file */ - - if ((color_type == PNG_COLOR_TYPE_GRAY) || - (color_type == PNG_COLOR_TYPE_GRAY_ALPHA)) - { - fprintf (pnm_file, "%s\n", (raw) ? "P5" : "P2"); - fprintf (pnm_file, "%d %d\n", (int) width, (int) height); - fprintf (pnm_file, "%ld\n", ((1L << (int) bit_depth) - 1L)); - } - else if ((color_type == PNG_COLOR_TYPE_RGB) || - (color_type == PNG_COLOR_TYPE_RGB_ALPHA)) - { - fprintf (pnm_file, "%s\n", (raw) ? "P6" : "P3"); - fprintf (pnm_file, "%d %d\n", (int) width, (int) height); - fprintf (pnm_file, "%ld\n", ((1L << (int) bit_depth) - 1L)); - } - - /* write header of PGM file with alpha channel */ - - if ((alpha) && - ((color_type == PNG_COLOR_TYPE_GRAY_ALPHA) || - (color_type == PNG_COLOR_TYPE_RGB_ALPHA))) - { - fprintf (alpha_file, "%s\n", (raw) ? "P5" : "P2"); - fprintf (alpha_file, "%d %d\n", (int) width, (int) height); - fprintf (alpha_file, "%ld\n", ((1L << (int) bit_depth) - 1L)); - } - - /* write data to PNM file */ - pix_ptr = png_pixels; - - for (row = 0; row < height; row++) - { - for (col = 0; col < width; col++) - { - for (i = 0; i < (channels - alpha_present); i++) - { - if (raw) - fputc ((int) *pix_ptr++ , pnm_file); - else - if (bit_depth == 16){ - dep_16 = (long) *pix_ptr++; - fprintf (pnm_file, "%ld ", (dep_16 << 8) + ((long) *pix_ptr++)); - } - else - fprintf (pnm_file, "%ld ", (long) *pix_ptr++); - } - if (alpha_present) - { - if (!alpha) - { - pix_ptr++; /* alpha */ - if (bit_depth == 16) - pix_ptr++; - } - else /* output alpha-channel as pgm file */ - { - if (raw) - fputc ((int) *pix_ptr++ , alpha_file); - else - if (bit_depth == 16){ - dep_16 = (long) *pix_ptr++; - fprintf (alpha_file, "%ld ", (dep_16 << 8) + (long) *pix_ptr++); - } - else - fprintf (alpha_file, "%ld ", (long) *pix_ptr++); - } - } /* if alpha_present */ - - if (!raw) - if (col % 4 == 3) - fprintf (pnm_file, "\n"); - } /* end for col */ - - if (!raw) - if (col % 4 != 0) - fprintf (pnm_file, "\n"); - } /* end for row */ - - if (row_pointers != (unsigned char**) NULL) - free (row_pointers); - if (png_pixels != (unsigned char*) NULL) - free (png_pixels); - - return TRUE; - -} /* end of source */ -