bdf2sfd

bdf2sfd.c (5971B)

---

 /*
  * bdf2sfd 1.1.6
  * Copyright (c) 2019-2021, Frederic Cambus
  * https://github.com/fcambus/bdf2sfd
  *
  * Created:      2019-11-21
  * Last Updated: 2021-02-28
  *
  * bdf2sfd is released under the BSD 2-Clause license.
  * See LICENSE file for details.
  *
  * SPDX-License-Identifier: BSD-2-Clause
  */
 
 #include <sys/stat.h>
 #include <sys/time.h>
 #include <sys/types.h>
 #include <err.h>
 #include <getopt.h>
 #include <inttypes.h>
 #include <stdbool.h>
 #include <stdlib.h>
 #include <stdint.h>
 #include <stdio.h>
 #include <string.h>
 #include <time.h>
 
 #ifdef HAVE_SECCOMP
 #include <sys/prctl.h>
 #include <linux/seccomp.h>
 #include "seccomp.h"
 #endif
 
 #include "compat.h"
 #include "config.h"
 #include "header.h"
 #include "parse.h"
 #include "polygon.h"
 
 static void
 usage()
 {
 	printf("bdf2sfd [-hv] [-f name] [-p name] font.bdf\n\n"
 	    "The options are as follows:\n\n"
 	    "	-f name	Specify font name.\n"
 	    "	-p name	Specify PostScript font name.\n"
 	    "	-h	Display usage.\n"
 	    "	-v	Display version.\n");
 }
 
 static void
 error(const char *str)
 {
 	errx(EXIT_FAILURE, "%s", str);
 }
 
 int
 main(int argc, char *argv[])
 {
 	struct timespec begin, current, elapsed;
 	struct stat bdf_stat;
 
 	float x = 0.0, y = 0.0;
 	float xlength = 64.0, ylength = 64.0; /* Default for 8x16 fonts */
 
 	uint64_t glyphs = 0;
 	uint32_t height = 0, width = 0;
 	uint32_t ascent = 0, descent = 0;
 	uint32_t mask = 0;
 
 	int opt, key, stride;
 
 	const char *errstr = NULL;
 	char *input;
 	char *value = NULL;
 	char linebuffer[LINE_LENGTH_MAX];
 
 	bool readglyph = false;
 	bool name_allocated = false, psname_allocated = false;
 
 	FILE *bdf;
 
 	struct fontinfo font;
 	memset(&font, 0, sizeof(struct fontinfo));
 
 	if (pledge("stdio rpath", NULL) == -1) {
 		err(EXIT_FAILURE, "pledge");
 	}
 
 #ifdef HAVE_SECCOMP
 	if (prctl(PR_SET_NO_NEW_PRIVS, 1, 0, 0, 0)) {
 		perror("Can't initialize seccomp");
 		return EXIT_FAILURE;
 	}
 
 	if (prctl(PR_SET_SECCOMP, SECCOMP_MODE_FILTER, &bdf2sfd)) {
 		perror("Can't load seccomp filter");
 		return EXIT_FAILURE;
 	}
 #endif
 
 	while ((opt = getopt(argc, argv, "f:p:hv")) != -1) {
 		switch (opt) {
 		case 'f':
 			font.name = optarg;
 			break;
 
 		case 'p':
 			font.psname = optarg;
 			break;
 
 		case 'h':
 			usage();
 			return EXIT_SUCCESS;
 
 		case 'v':
 			printf("%s\n", VERSION);
 			return EXIT_SUCCESS;
 		}
 	}
 
 	if (optind < argc) {
 		input = argv[optind];
 	} else {
 		usage();
 		return EXIT_SUCCESS;
 	}
 
 	/* Starting timer */
 	clock_gettime(CLOCK_MONOTONIC, &begin);
 
 	/* Open BDF file */
 	if (!strcmp(input, "-")) {
 		/* Read from standard input */
 		bdf = stdin;
 	} else {
 		/* Attempt to read from file */
 		if (!(bdf = fopen(input, "r"))) {
 			perror("Can't open BDF file");
 			return EXIT_FAILURE;
 		}
 	}
 
 	/* Get BDF file size */
 	if (fstat(fileno(bdf), &bdf_stat)) {
 		perror("Can't stat BDF file");
 		return EXIT_FAILURE;
 	}
 
 	while (fgets(linebuffer, LINE_LENGTH_MAX, bdf)) {
 		if (!*linebuffer)
 			continue;
 
 		key = parseLine(linebuffer);
 
 		switch(key) {
 		case FAMILY_NAME:
 		case COPYRIGHT:
 		case FONT_ASCENT:
 		case FONT_DESCENT:
 		case FONT_VERSION:
 		case CHARS:
 		case STARTCHAR:
 		case ENCODING:
 			value = strtok(NULL, "\n");
 
 			if (!value)
 				continue;
 		}
 
 		switch(key) {
 		case FAMILY_NAME:
 			if (!font.name) {
 				if ((font.name = strdup(value)) == NULL)
 					error("Memory allocation error.");
 
 				name_allocated = true;
 			}
 
 			if (!font.psname) {
 				if ((font.psname = strdup(value)) == NULL)
 					error("Memory allocation error.");
 
 				psname_allocated = true;
 			}
 
 			continue;
 
 		case COPYRIGHT:
 			if ((font.copyright = strdup(value)) == NULL)
 				error("Memory allocation error.");
 
 			continue;
 
 		case FONTBOUNDINGBOX:
 			value = strtok(NULL, " \t");
 
 			if (value)
 				width = strtonum(value, 0, 32, &errstr);
 
 			if (errstr)
 				error("Invalid value for FONTBOUNDINGBOX.");
 
 			value = strtok(NULL, " \t");
 
 			if (value)
 				height = strtonum(value, 0, 64, &errstr);
 
 			if (errstr)
 				error("Invalid value for FONTBOUNDINGBOX.");
 
 			if (!width || !height)
 				error("Invalid value for FONTBOUNDINGBOX.");
 
 			xlength = 512.0 / width;
 			ylength = 1024.0 / height;
 
 			stride = (width + 7) / 8;
 			mask = 1 << (stride * 8 - 1);
 
 			continue;
 
 		case FONT_ASCENT:
 			ascent = strtonum(value, 0, 64, &errstr);
 
 			if (!errstr)
 				font.ascent = ascent * ylength;
 			else
 				error("Invalid value for FONT_ASCENT.");
 
 			continue;
 
 		case FONT_DESCENT:
 			descent = strtonum(value, 0, 64, &errstr);
 
 			if (!errstr)
 				font.descent = descent * ylength;
 			else
 				error("Invalid value for FONT_DESCENT.");
 
 			continue;
 
 		case FONT_VERSION:
 			if ((font.version = strdup(value)) == NULL)
 				error("Memory allocation error.");
 
 			continue;
 
 		case CHARS:
 			font.chars = value;
 
 			if (font.chars)
 				header(stdout, &font);
 			else
 				error("Invalid value for CHARS.");
 
 			continue;
 
 		case STARTCHAR:
 			fprintf(stdout, "StartChar: %s", value);
 
 			continue;
 
 		case ENCODING:
 			fprintf(stdout, "\nEncoding: %s %s %s\n",
 			    value, value, value);
 
 			continue;
 
 		case BITMAP:
 			fprintf(stdout, "Width: 512\n"
 					"Flags: HW\n"
 					"LayerCount: 2\n"
 					"Fore\n"
 					"SplineSet\n");
 
 			y = font.ascent;
 			readglyph = true;
 			glyphs++;
 
 			continue;
 
 		case ENDCHAR:
 			fprintf(stdout, "EndSplineSet\n"
 					"EndChar\n\n");
 
 			readglyph = false;
 			continue;
 		}
 
 		if (readglyph) {
 			uint32_t row = strtoul(linebuffer, NULL, 16);
 
 			polygon(row, mask, width, x, y, xlength, ylength);
 			
 			y -= ylength;
 		}
 	}
 
 	fprintf(stdout, "EndChars\n"
 			"EndSplineFont\n");
 
 	/* Stopping timer */
 	clock_gettime(CLOCK_MONOTONIC, &current);
 
 	timespecsub(&current, &begin, &elapsed);
 
 	/* Printing results */
 	fprintf(stderr, "Processed %" PRIu64 " glyphs in %f seconds.\n",
 	    glyphs, elapsed.tv_sec + elapsed.tv_nsec / 1E9);
 
 	/* Clean up */
 	fclose(bdf);
 
 	if (name_allocated)
 		free(font.name);
 
 	if (psname_allocated)
 		free(font.psname);
 
 	free(font.copyright);
 	free(font.version);
 
 	return EXIT_SUCCESS;
 }