diff options
Diffstat (limited to 'Build/source/libs/libpng/libpng-src/contrib/pngminus/pnm2png.c')
-rw-r--r-- | Build/source/libs/libpng/libpng-src/contrib/pngminus/pnm2png.c | 620 |
1 files changed, 0 insertions, 620 deletions
diff --git a/Build/source/libs/libpng/libpng-src/contrib/pngminus/pnm2png.c b/Build/source/libs/libpng/libpng-src/contrib/pngminus/pnm2png.c deleted file mode 100644 index a2c2551da92..00000000000 --- a/Build/source/libs/libpng/libpng-src/contrib/pngminus/pnm2png.c +++ /dev/null @@ -1,620 +0,0 @@ -/* - * pnm2png.c --- conversion from PBM/PGM/PPM-file to PNG-file - * copyright (C) 1999-2019 by Willem van Schaik <willem at schaik dot com> - * - * This software is released under the MIT license. For conditions of - * distribution and use, see the LICENSE file part of this package. - */ - -#include <stdio.h> -#include <stdlib.h> -#include <fcntl.h> - -#ifndef BOOL -#define BOOL unsigned char -#endif -#ifndef TRUE -#define TRUE (BOOL) 1 -#endif -#ifndef FALSE -#define FALSE (BOOL) 0 -#endif - -/* make pnm2png verbose so we can find problems (needs to be before png.h) */ -#ifndef PNG_DEBUG -#define PNG_DEBUG 0 -#endif - -#include "png.h" - -/* function prototypes */ - -int main (int argc, char *argv[]); -void usage (); -BOOL pnm2png (FILE *pnm_file, FILE *png_file, FILE *alpha_file, - BOOL interlace, BOOL alpha); -void get_token (FILE *pnm_file, char *token_buf, size_t token_buf_size); -png_uint_32 get_data (FILE *pnm_file, int depth); -png_uint_32 get_value (FILE *pnm_file, int depth); - -/* - * main - */ - -int main (int argc, char *argv[]) -{ - FILE *fp_rd = stdin; - FILE *fp_al = NULL; - FILE *fp_wr = stdout; - BOOL interlace = FALSE; - BOOL alpha = FALSE; - int argi; - - for (argi = 1; argi < argc; argi++) - { - if (argv[argi][0] == '-') - { - switch (argv[argi][1]) - { - case 'i': - interlace = TRUE; - break; - case 'a': - alpha = TRUE; - argi++; - if ((fp_al = fopen (argv[argi], "rb")) == NULL) - { - fprintf (stderr, "PNM2PNG\n"); - fprintf (stderr, "Error: alpha-channel file %s does not exist\n", - argv[argi]); - exit (1); - } - break; - case 'h': - case '?': - usage (); - exit (0); - break; - default: - fprintf (stderr, "PNM2PNG\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, "PNM2PNG\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, "PNM2PNG\n"); - fprintf (stderr, "Error: cannot create PNG-file %s\n", argv[argi]); - exit (1); - } - } - else - { - fprintf (stderr, "PNM2PNG\n"); - fprintf (stderr, "Error: too many parameters\n"); - usage (); - exit (1); - } - } /* end for */ - -#if defined(O_BINARY) && (O_BINARY != 0) - /* set stdin/stdout to binary, - * we're reading the PNM always! in binary format - */ - if (fp_rd == stdin) - setmode (fileno (stdin), O_BINARY); - if (fp_wr == stdout) - setmode (fileno (stdout), O_BINARY); -#endif - - /* call the conversion program itself */ - if (pnm2png (fp_rd, fp_wr, fp_al, interlace, alpha) == FALSE) - { - fprintf (stderr, "PNM2PNG\n"); - fprintf (stderr, "Error: unsuccessful converting to 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, "PNM2PNG\n"); - fprintf (stderr, " by Willem van Schaik, 1999\n"); - fprintf (stderr, "Usage: pnm2png [options] <file>.<pnm> [<file>.png]\n"); - fprintf (stderr, " or: ... | pnm2png [options]\n"); - fprintf (stderr, "Options:\n"); - fprintf (stderr, " -i[nterlace] write png-file with interlacing on\n"); - fprintf (stderr, - " -a[lpha] <file>.pgm read PNG alpha channel as pgm-file\n"); - fprintf (stderr, " -h | -? print this help-information\n"); -} - -/* - * pnm2png - */ - -BOOL pnm2png (FILE *pnm_file, FILE *png_file, FILE *alpha_file, - BOOL interlace, BOOL alpha) -{ - png_struct *png_ptr = NULL; - png_info *info_ptr = NULL; - png_byte *png_pixels = NULL; - png_byte **row_pointers = NULL; - png_byte *pix_ptr = NULL; - volatile png_uint_32 row_bytes; - - char type_token[16]; - char width_token[16]; - char height_token[16]; - char maxval_token[16]; - volatile int color_type = 1; - unsigned long ul_width = 0, ul_alpha_width = 0; - unsigned long ul_height = 0, ul_alpha_height = 0; - unsigned long ul_maxval = 0; - volatile png_uint_32 width = 0, height = 0; - volatile png_uint_32 alpha_width = 0, alpha_height = 0; - png_uint_32 maxval; - volatile int bit_depth = 0; - int channels = 0; - int alpha_depth = 0; - int alpha_present = 0; - int row, col; - BOOL raw, alpha_raw = FALSE; -#if defined(PNG_WRITE_INVERT_SUPPORTED) || defined(PNG_WRITE_PACK_SUPPORTED) - BOOL packed_bitmap = FALSE; -#endif - png_uint_32 tmp16; - int i; - - /* read header of PNM file */ - - get_token (pnm_file, type_token, sizeof (type_token)); - if (type_token[0] != 'P') - { - return FALSE; - } - else if ((type_token[1] == '1') || (type_token[1] == '4')) - { -#if defined(PNG_WRITE_INVERT_SUPPORTED) || defined(PNG_WRITE_PACK_SUPPORTED) - raw = (type_token[1] == '4'); - color_type = PNG_COLOR_TYPE_GRAY; - get_token (pnm_file, width_token, sizeof (width_token)); - sscanf (width_token, "%lu", &ul_width); - width = (png_uint_32) ul_width; - get_token (pnm_file, height_token, sizeof (height_token)); - sscanf (height_token, "%lu", &ul_height); - height = (png_uint_32) ul_height; - bit_depth = 1; - packed_bitmap = TRUE; -#else - fprintf (stderr, "PNM2PNG built without PNG_WRITE_INVERT_SUPPORTED and\n"); - fprintf (stderr, "PNG_WRITE_PACK_SUPPORTED can't read PBM (P1,P4) files\n"); - return FALSE; -#endif - } - else if ((type_token[1] == '2') || (type_token[1] == '5')) - { - raw = (type_token[1] == '5'); - color_type = PNG_COLOR_TYPE_GRAY; - get_token (pnm_file, width_token, sizeof (width_token)); - sscanf (width_token, "%lu", &ul_width); - width = (png_uint_32) ul_width; - get_token (pnm_file, height_token, sizeof (height_token)); - sscanf (height_token, "%lu", &ul_height); - height = (png_uint_32) ul_height; - get_token (pnm_file, maxval_token, sizeof (maxval_token)); - sscanf (maxval_token, "%lu", &ul_maxval); - maxval = (png_uint_32) ul_maxval; - - if (maxval <= 1) - bit_depth = 1; - else if (maxval <= 3) - bit_depth = 2; - else if (maxval <= 15) - bit_depth = 4; - else if (maxval <= 255) - bit_depth = 8; - else if (maxval <= 65535U) - bit_depth = 16; - else /* maxval > 65535U */ - return FALSE; - } - else if ((type_token[1] == '3') || (type_token[1] == '6')) - { - raw = (type_token[1] == '6'); - color_type = PNG_COLOR_TYPE_RGB; - get_token (pnm_file, width_token, sizeof (width_token)); - sscanf (width_token, "%lu", &ul_width); - width = (png_uint_32) ul_width; - get_token (pnm_file, height_token, sizeof (height_token)); - sscanf (height_token, "%lu", &ul_height); - height = (png_uint_32) ul_height; - get_token (pnm_file, maxval_token, sizeof (maxval_token)); - sscanf (maxval_token, "%lu", &ul_maxval); - maxval = (png_uint_32) ul_maxval; - if (maxval <= 1) - bit_depth = 1; - else if (maxval <= 3) - bit_depth = 2; - else if (maxval <= 15) - bit_depth = 4; - else if (maxval <= 255) - bit_depth = 8; - else if (maxval <= 65535U) - bit_depth = 16; - else /* maxval > 65535U */ - return FALSE; - } - else - { - return FALSE; - } - - /* read header of PGM file with alpha channel */ - - if (alpha) - { - if (color_type == PNG_COLOR_TYPE_GRAY) - color_type = PNG_COLOR_TYPE_GRAY_ALPHA; - if (color_type == PNG_COLOR_TYPE_RGB) - color_type = PNG_COLOR_TYPE_RGB_ALPHA; - - get_token (alpha_file, type_token, sizeof (type_token)); - if (type_token[0] != 'P') - { - return FALSE; - } - else if ((type_token[1] == '2') || (type_token[1] == '5')) - { - alpha_raw = (type_token[1] == '5'); - get_token (alpha_file, width_token, sizeof (width_token)); - sscanf (width_token, "%lu", &ul_alpha_width); - alpha_width = (png_uint_32) ul_alpha_width; - if (alpha_width != width) - return FALSE; - get_token (alpha_file, height_token, sizeof (height_token)); - sscanf (height_token, "%lu", &ul_alpha_height); - alpha_height = (png_uint_32) ul_alpha_height; - if (alpha_height != height) - return FALSE; - get_token (alpha_file, maxval_token, sizeof (maxval_token)); - sscanf (maxval_token, "%lu", &ul_maxval); - maxval = (png_uint_32) ul_maxval; - if (maxval <= 1) - alpha_depth = 1; - else if (maxval <= 3) - alpha_depth = 2; - else if (maxval <= 15) - alpha_depth = 4; - else if (maxval <= 255) - alpha_depth = 8; - else if (maxval <= 65535U) - alpha_depth = 16; - else /* maxval > 65535U */ - return FALSE; - if (alpha_depth != bit_depth) - return FALSE; - } - else - { - return FALSE; - } - } /* end if alpha */ - - /* calculate the 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; -#if 0 - else - channels = 0; /* cannot happen */ -#endif - - alpha_present = (channels - 1) % 2; - -#if defined(PNG_WRITE_INVERT_SUPPORTED) || defined(PNG_WRITE_PACK_SUPPORTED) - if (packed_bitmap) - { - /* row data is as many bytes as can fit width x channels x bit_depth */ - row_bytes = (width * channels * bit_depth + 7) / 8; - } - else -#endif - { - /* row_bytes is the width x number of channels x (bit-depth / 8) */ - row_bytes = width * channels * ((bit_depth <= 8) ? 1 : 2); - } - - if ((row_bytes == 0) || - ((size_t) height > (size_t) (-1) / (size_t) row_bytes)) - { - /* too big */ - return FALSE; - } - if ((png_pixels = (png_byte *) - malloc ((size_t) row_bytes * (size_t) height)) == NULL) - { - /* out of memory */ - return FALSE; - } - - /* read data from PNM file */ - pix_ptr = png_pixels; - - for (row = 0; row < (int) height; row++) - { -#if defined(PNG_WRITE_INVERT_SUPPORTED) || defined(PNG_WRITE_PACK_SUPPORTED) - if (packed_bitmap) - { - for (i = 0; i < (int) row_bytes; i++) - { - /* png supports this format natively so no conversion is needed */ - *pix_ptr++ = get_data (pnm_file, 8); - } - } - else -#endif - { - for (col = 0; col < (int) width; col++) - { - for (i = 0; i < (channels - alpha_present); i++) - { - if (raw) - { - *pix_ptr++ = get_data (pnm_file, bit_depth); - } - else - { - if (bit_depth <= 8) - { - *pix_ptr++ = get_value (pnm_file, bit_depth); - } - else - { - tmp16 = get_value (pnm_file, bit_depth); - *pix_ptr = (png_byte) ((tmp16 >> 8) & 0xFF); - pix_ptr++; - *pix_ptr = (png_byte) (tmp16 & 0xFF); - pix_ptr++; - } - } - } - - if (alpha) /* read alpha-channel from pgm file */ - { - if (alpha_raw) - { - *pix_ptr++ = get_data (alpha_file, alpha_depth); - } - else - { - if (alpha_depth <= 8) - { - *pix_ptr++ = get_value (alpha_file, bit_depth); - } - else - { - tmp16 = get_value (alpha_file, bit_depth); - *pix_ptr++ = (png_byte) ((tmp16 >> 8) & 0xFF); - *pix_ptr++ = (png_byte) (tmp16 & 0xFF); - } - } - } /* end if alpha */ - } /* end if packed_bitmap */ - } /* end for col */ - } /* end for row */ - - /* prepare the standard PNG structures */ - png_ptr = png_create_write_struct (png_get_libpng_ver(NULL), - NULL, NULL, NULL); - if (!png_ptr) - { - free (png_pixels); - return FALSE; - } - info_ptr = png_create_info_struct (png_ptr); - if (!info_ptr) - { - png_destroy_write_struct (&png_ptr, NULL); - free (png_pixels); - return FALSE; - } - -#if defined(PNG_WRITE_INVERT_SUPPORTED) || defined(PNG_WRITE_PACK_SUPPORTED) - if (packed_bitmap == TRUE) - { - png_set_packing (png_ptr); - png_set_invert_mono (png_ptr); - } -#endif - - if (setjmp (png_jmpbuf (png_ptr))) - { - png_destroy_write_struct (&png_ptr, &info_ptr); - free (png_pixels); - return FALSE; - } - - /* initialize the png structure */ - png_init_io (png_ptr, png_file); - - /* we're going to write more or less the same PNG as the input file */ - png_set_IHDR (png_ptr, info_ptr, width, height, bit_depth, color_type, - (!interlace) ? PNG_INTERLACE_NONE : PNG_INTERLACE_ADAM7, - PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE); - - /* write the file header information */ - png_write_info (png_ptr, info_ptr); - - /* if needed we will allocate memory for an new array of row-pointers */ - if (row_pointers == NULL) - { - if ((row_pointers = (png_byte **) - malloc (height * sizeof (png_byte *))) == NULL) - { - png_destroy_write_struct (&png_ptr, &info_ptr); - free (png_pixels); - return FALSE; - } - } - - /* set the individual row_pointers to point at the correct offsets */ - for (i = 0; i < (int) height; i++) - row_pointers[i] = png_pixels + i * row_bytes; - - /* write out the entire image data in one call */ - png_write_image (png_ptr, row_pointers); - - /* write the additional chunks to the PNG file (not really needed) */ - png_write_end (png_ptr, info_ptr); - - /* clean up after the write, and free any memory allocated */ - png_destroy_write_struct (&png_ptr, &info_ptr); - - if (row_pointers != NULL) - free (row_pointers); - if (png_pixels != NULL) - free (png_pixels); - - return TRUE; -} /* end of pnm2png */ - -/* - * get_token - gets the first string after whitespace - */ - -void get_token (FILE *pnm_file, char *token_buf, size_t token_buf_size) -{ - size_t i = 0; - int ret; - - /* remove white-space and comment lines */ - do - { - ret = fgetc (pnm_file); - if (ret == '#') - { - /* the rest of this line is a comment */ - do - { - ret = fgetc (pnm_file); - } - while ((ret != '\n') && (ret != '\r') && (ret != EOF)); - } - if (ret == EOF) break; - token_buf[i] = (char) ret; - } - while ((ret == '\n') || (ret == '\r') || (ret == ' ')); - - /* read string */ - do - { - ret = fgetc (pnm_file); - if (ret == EOF) break; - if (++i == token_buf_size - 1) break; - token_buf[i] = (char) ret; - } - while ((ret != '\n') && (ret != '\r') && (ret != ' ')); - - token_buf[i] = '\0'; - - return; -} - -/* - * get_data - takes first byte and converts into next pixel value, - * taking as much bits as defined by bit-depth and - * using the bit-depth to fill up a byte (0Ah -> AAh) - */ - -png_uint_32 get_data (FILE *pnm_file, int depth) -{ - static int bits_left = 0; - static int old_value = 0; - static int mask = 0; - int i; - png_uint_32 ret_value; - - if (mask == 0) - for (i = 0; i < depth; i++) - mask = (mask >> 1) | 0x80; - - if (bits_left <= 0) - { - old_value = fgetc (pnm_file); - bits_left = 8; - } - - ret_value = old_value & mask; - for (i = 1; i < (8 / depth); i++) - ret_value = ret_value || (ret_value >> depth); - - old_value = (old_value << depth) & 0xFF; - bits_left -= depth; - - return ret_value; -} - -/* - * get_value - takes first (numeric) string and converts into number, - * using the bit-depth to fill up a byte (0Ah -> AAh) - */ - -png_uint_32 get_value (FILE *pnm_file, int depth) -{ - static png_uint_32 mask = 0; - char token[16]; - unsigned long ul_ret_value; - png_uint_32 ret_value; - int i = 0; - - if (mask == 0) - for (i = 0; i < depth; i++) - mask = (mask << 1) | 0x01; - - get_token (pnm_file, token, sizeof (token)); - sscanf (token, "%lu", &ul_ret_value); - ret_value = (png_uint_32) ul_ret_value; - - ret_value &= mask; - - if (depth < 8) - for (i = 0; i < (8 / depth); i++) - ret_value = (ret_value << depth) || ret_value; - - return ret_value; -} - -/* end of source */ |