bdfload.c revision 7d6aaba4 
1/*	$NetBSD: bdfload.c,v 1.10 2022/08/23 18:28:14 macallan Exp $	*/
2
3/*
4 * Copyright (c) 2018 Michael Lorenz
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28/*
29 * a crude BDF loader for wsdisplay
30 */
31
32#include <stdlib.h>
33#include <stdio.h>
34#include <fcntl.h>
35#include <unistd.h>
36#include <string.h>
37#include <errno.h>
38#include <ctype.h>
39#include <sys/ioctl.h>
40#include <err.h>
41
42#include <dev/wscons/wsconsio.h>
43
44/*
45 * wsdisplay_font but with strings embedded and integer fields in
46 * little endian
47 */
48struct wsfthdr {
49	char magic[4];		/* "WSFT" */
50	char name[64];
51	uint32_t firstchar;
52	uint32_t numchars;
53	uint32_t encoding;
54	uint32_t fontwidth;
55	uint32_t fontheight;
56	uint32_t stride;
57	uint32_t bitorder;
58	uint32_t byteorder;
59};
60
61
62const struct encmap {
63	const char *name;
64	int encoding;
65} encmap[] = {
66	{ "cp437",	WSDISPLAY_FONTENC_IBM },
67	{ "ibm",	WSDISPLAY_FONTENC_IBM },
68	{ "iso",	WSDISPLAY_FONTENC_ISO },
69	{ "iso-8859-1",	WSDISPLAY_FONTENC_ISO },
70	{ "iso-8859-2",	WSDISPLAY_FONTENC_ISO2 },
71	{ "iso-8859-7",	WSDISPLAY_FONTENC_ISO7 },
72	{ "iso2",	WSDISPLAY_FONTENC_ISO2 },
73	{ "iso7",	WSDISPLAY_FONTENC_ISO7 },
74	{ "iso8859-1",	WSDISPLAY_FONTENC_ISO },
75	{ "iso8859-2",	WSDISPLAY_FONTENC_ISO2 },
76	{ "iso8859-7",	WSDISPLAY_FONTENC_ISO7 },
77	{ "koi8-r",	WSDISPLAY_FONTENC_KOI8_R },
78	{ "koi8r",	WSDISPLAY_FONTENC_KOI8_R },
79	{ "latin-1",	WSDISPLAY_FONTENC_ISO },
80	{ "latin-2",	WSDISPLAY_FONTENC_ISO2 },
81	{ "latin1",	WSDISPLAY_FONTENC_ISO },
82	{ "latin2",	WSDISPLAY_FONTENC_ISO2 },
83	{ "pcvt",	WSDISPLAY_FONTENC_PCVT },
84	{ NULL, -1 }
85};
86
87const char * const encname[] = {
88#define _ENC(_e) [_e] = #_e
89	_ENC(WSDISPLAY_FONTENC_ISO),
90	_ENC(WSDISPLAY_FONTENC_IBM),
91	_ENC(WSDISPLAY_FONTENC_PCVT),
92	_ENC(WSDISPLAY_FONTENC_ISO7),
93	_ENC(WSDISPLAY_FONTENC_ISO2),
94	_ENC(WSDISPLAY_FONTENC_KOI8_R),
95};
96
97
98const char *ofile = NULL;
99int encoding = -1;
100int verbose = 0;
101int dump = 0;
102int header = 0;
103char commentbuf[2048] = "";
104int commentptr = 0;
105
106void
107dump_line(char *gptr, int stride)
108{
109	int i, j, msk, c;
110
111	for (i = 0; i < stride; i++) {
112		c = gptr[i];
113		msk = 0x80;
114		for (j = 0; j < 8; j++) {
115			putchar((c & msk) != 0 ? '#' : ' ');
116			msk = msk >> 1;
117		}
118	}
119	printf("\n");
120}
121
122void
123write_wsf(const char *oname, struct wsdisplay_font *f, char *buffer, int buflen)
124{
125	struct wsfthdr h;
126
127	memset(&h, 0, sizeof(h));
128	strncpy(h.magic, "WSFT", sizeof(h.magic));
129	strncpy(h.name, f->name, sizeof(h.name));
130	h.firstchar = htole32(f->firstchar);
131	h.numchars = htole32(f->numchars);
132	h.encoding = htole32(f->encoding);
133	h.fontwidth = htole32(f->fontwidth);
134	h.fontheight = htole32(f->fontheight);
135	h.stride = htole32(f->stride);
136	h.bitorder = htole32(f->bitorder);
137	h.byteorder = htole32(f->byteorder);
138
139	int wsfd = open(ofile, O_WRONLY | O_CREAT | O_TRUNC, 0644);
140	if (wsfd < 0)
141		err(EXIT_FAILURE, "%s", ofile);
142
143	ssize_t nwritten;
144	nwritten = write(wsfd, &h, sizeof(h));
145	if (nwritten < 0)
146		err(EXIT_FAILURE, "%s", ofile);
147	if (nwritten != sizeof(h))
148		errx(EXIT_FAILURE, "%s: partial write", ofile);
149
150	nwritten = write(wsfd, buffer, buflen);
151	if (nwritten < 0)
152		err(EXIT_FAILURE, "%s", ofile);
153	if (nwritten != buflen)
154		errx(EXIT_FAILURE, "%s: partial write", ofile);
155	close(wsfd);
156}
157
158int
159write_header(const char *filename, struct wsdisplay_font *f, char *name,
160             char *buffer, int buflen)
161{
162	FILE *output;
163	int i, j, x, y, idx;
164	char fontname[64], c, msk;
165
166	/* now output as a header file */
167	snprintf(fontname, sizeof(fontname), "%s_%dx%d", name,
168	    f->fontwidth, f->fontheight);
169	for (i = 0; i < strlen(fontname); i++) {
170		if (isblank((int)fontname[i]))
171			fontname[i]='_';
172	}
173	if ((output = fopen(filename, "w")) == NULL) {
174		fprintf(stderr, "Can't open output file %s\n", filename);
175		return -1;
176	}
177	if (commentptr > 0) {
178		fprintf(output, "/*\n");
179		fputs(commentbuf, output);
180		fprintf(output, "*/\n\n");
181	}
182
183	fprintf(output, "static u_char %s_data[];\n", fontname);
184	fprintf(output, "\n");
185	fprintf(output, "static struct wsdisplay_font %s = {\n", fontname);
186	fprintf(output, "\t\"%s\",\t\t\t/* typeface name */\n", name);
187	fprintf(output, "\t%d,\t\t\t\t/* firstchar */\n", f->firstchar);
188	fprintf(output, "\t%d,\t\t\t\t/* numchars */\n", f->numchars);
189	fprintf(output, "\t%d,\t\t\t\t/* encoding */\n", f->encoding);
190	fprintf(output, "\t%d,\t\t\t\t/* fontwidth */\n", f->fontwidth);
191	fprintf(output, "\t%d,\t\t\t\t/* fontheight */\n", f->fontheight);
192	fprintf(output, "\t%d,\t\t\t\t/* stride */\n", f->stride);
193	fprintf(output, "\tWSDISPLAY_FONTORDER_L2R,\t/* bit order */\n");
194	fprintf(output, "\tWSDISPLAY_FONTORDER_L2R,\t/* byte order */\n");
195	fprintf(output, "\t%s_data\t\t/* data */\n", fontname);
196	fprintf(output, "};\n\n");
197	fprintf(output, "static u_char %s_data[] = {\n", fontname);
198	for (i = f->firstchar; i < f->firstchar + f->numchars; i++) {
199		fprintf(output, "\t/* %d */\n", i);
200		idx = i * f->stride * f->fontheight;
201		for (y = 0; y < f->fontheight; y++) {
202			for (x = 0; x < f->stride; x++) {
203				fprintf(output, "0x%02x, ",buffer[idx + x]);
204			}
205			fprintf(output, "/* ");
206			for (x = 0; x < f->stride; x++) {
207				c = buffer[idx + x];
208				msk = 0x80;
209				for (j = 0; j < 8; j++) {
210					fprintf(output, "%s",
211					    (c & msk) != 0 ? "[]" : ". ");
212					msk = msk >> 1;
213				}
214			}
215			fprintf(output, " */\n");
216
217			idx += f->stride;
218		}
219	}
220	fprintf(output, "};\n");
221	fclose(output);
222	return 0;
223}
224
225void
226interpret(FILE *foo)
227{
228	char line[128], *arg, name[64] = "foop", *buffer;
229	int buflen = -1;
230	int len, in_char = 0, current = -1, stride = 0, charsize = 0;
231	int width, height, x, y, num;
232	int first = 255, last = 0;
233	int left, top, lines;
234	int bl = 255, bt = 255, br = -1, bb = -1;
235	struct wsdisplay_font f;
236	int status;
237
238	while (fgets(line, sizeof(line), foo) != NULL) {
239		int i = 0;
240		/* separate keyword from parameters */
241		len = strlen(line);
242		while (!isspace(line[i]) && (i < len)) i++;
243		line[i] = 0;
244		arg = &line[i + 1];
245		i = 0;
246		len = strlen(arg);
247		/* get rid of garbage */
248		while ((!iscntrl(arg[i])) && (arg[i] != 0)) {
249			i++;
250		}
251		arg[i] = 0;
252		if (strcmp(line, "FAMILY_NAME") == 0) {
253			/* cut off quotation marks */
254			strncpy(name, arg + 1, 64);
255			name[strlen(name) - 1] = 0;
256			if (verbose) printf("name: %s\n", name);
257		} else if (strcmp(line, "COMMENT") == 0) {
258			commentptr += snprintf(&commentbuf[commentptr],
259					      2048 - commentptr,
260					      "%s\n", arg);
261		} else if (strcmp(line, "FONTBOUNDINGBOX") == 0) {
262			int res;
263			res = sscanf(arg, "%d %d %d %d",
264					  &width, &height, &x, &y);
265			stride = (width + 7) >> 3;
266			if (verbose) printf("box %d x %d\n", width, height);
267			if (stride > 2) {
268				err(EXIT_FAILURE,
269				    "no fonts wider than 16 work for now\n");
270			}
271			charsize = height * stride;
272			buflen = 256 * charsize;
273			buffer = calloc(1, buflen);
274			if (buffer == NULL) {
275				err(EXIT_FAILURE,
276				    "failed to allocate %dKB for glyphs\n",
277				    buflen);
278			}
279		} else if (strcmp(line, "CHARS") == 0) {
280			if (sscanf(arg, "%d", &num) == 1)
281				if (verbose)
282				    printf("number of characters: %d\n", num);
283		} else if (strcmp(line, "STARTCHAR") == 0) {
284			in_char = 1;
285		} else if (strcmp(line, "ENDCHAR") == 0) {
286			in_char = 0;
287			current = -1;
288		} else if (strcmp(line, "ENCODING") == 0) {
289			if (sscanf(arg, "%d", &current) == 1) {
290				if (current >= 0 && current < 256) {
291					if (current < first) first = current;
292					if (current > last) last = current;
293					if (dump) printf("glyph %d\n", current);
294				}
295			}
296		} else if (strcmp(line, "BBX") == 0) {
297			int cx, cy, cwi, che;
298			if (sscanf(arg, "%d %d %d %d", &cwi, &che, &cx, &cy)
299			     == 4) {
300				left = cx;
301				lines = che;
302				top = height + y - che - cy;
303				if (left < bl) bl = left;
304				if (top < bt) bt = top;
305				if ((left + cwi) > br) br = left + cwi;
306				if ((top + che) > bb) bb = top + che;
307				if(dump && verbose) printf("top %d left %d\n", top, left);
308			}
309		} else if (strcmp(line, "BITMAP") == 0) {
310			int i, j, k, l;
311			char num[32];
312			char *gptr = &buffer[charsize * current];
313			char *bptr = gptr + top;
314			uint16_t *bptr16 = (uint16_t *)gptr;
315			bptr16 += top;
316			/* see if the character is in range */
317			if ((current < 0) || (current > 255)) continue;
318			/* now we read & render the character */
319			for (i = 0; i < lines; i++) {
320				fgets(num, 32, foo);
321				sscanf(num, "%x", &l);
322				if ((stride) == 2 && (strlen(num) < 4))
323					l = l << 8;
324				l = l >> left;
325				if (stride == 1) {
326					*bptr = l;
327					bptr++;
328				} else {
329					*bptr16 = htobe16(l);
330					bptr16++;
331				}
332			}
333			if (dump) {
334				gptr = &buffer[charsize * current];
335				for (i = 0; i < height; i++) {
336					dump_line(gptr, stride);
337					gptr += stride;
338				}
339			}
340		}
341	}
342	if (verbose) {
343		printf("range %d to %d\n", first, last);
344		printf("encoding: %s\n", encname[encoding]);
345		printf("actual box: %d %d %d %d\n", bl, bt, br, bb);
346	}
347
348	/* now stuff it into a something wsfont understands */
349	f.fontwidth = width /*(width + 3) & ~3*/;
350	f.fontheight = height;
351	f.firstchar = first;
352	f.numchars = last - first + 1;
353	f.stride = stride;
354	f.encoding = encoding;
355	f.name = name;
356	f.bitorder = WSDISPLAY_FONTORDER_L2R;
357	f.byteorder = WSDISPLAY_FONTORDER_L2R;
358	f.data = &buffer[first * charsize];
359
360	if (ofile == NULL) {
361		int fdev = open("/dev/wsfont", O_RDWR, 0);
362		if (fdev < 0)
363			err(EXIT_FAILURE, "/dev/wsfont");
364		status = ioctl(fdev, WSDISPLAYIO_LDFONT, &f);
365		if (status != 0)
366			err(EXIT_FAILURE, "WSDISPLAYIO_LDFONT");
367		close(fdev);
368	}
369	else {
370		if (header == 0) {
371			write_wsf(ofile, &f, buffer, buflen);
372		} else
373			write_header(ofile, &f, name, buffer, buflen);
374	}
375}
376
377__dead void
378usage()
379{
380	fprintf(stderr, "usage: bdfload [-vdh] [-e encoding] [-o ofile.wsf] font.bdf\n");
381	exit(EXIT_FAILURE);
382}
383
384int
385main(int argc, char *argv[])
386{
387	FILE *foo;
388	const char *encname = NULL;
389
390	int c;
391	while ((c = getopt(argc, argv, "e:o:vdh")) != -1) {
392		switch (c) {
393
394		/* font encoding */
395		case 'e':
396			if (encname != NULL)
397				usage();
398			encname = optarg;
399			break;
400
401		/* output file name */
402		case 'o':
403			if (ofile != NULL)
404				usage();
405			ofile = optarg;
406			break;
407
408		case 'v':
409			verbose = 1;
410			break;
411
412		case 'd':
413			dump = 1;
414			break;
415
416		case 'h':
417			header = 1;
418			break;
419
420		case '?':	/* FALLTHROUGH */
421		default:
422			usage();
423		}
424	}
425
426	argc -= optind;
427	argv += optind;
428
429	if (encname == NULL) {
430		encoding = WSDISPLAY_FONTENC_ISO;
431	}
432	else {
433		for (const struct encmap *e = encmap; e->name; ++e) {
434			if (strcmp(e->name, encname) == 0) {
435				encoding = e->encoding;
436				break;
437			}
438		}
439	}
440
441	/* get encoding from the bdf file? */
442	if (encoding == -1)
443		encoding = WSDISPLAY_FONTENC_ISO;
444
445	if (argc == 0)
446		usage();
447
448	const char *bdfname = argv[0];
449	foo = fopen(bdfname, "r");
450	if (foo == NULL)
451		err(EXIT_FAILURE, "%s", bdfname);
452
453	interpret(foo);
454	return EXIT_SUCCESS;
455}
456