File: font.c

package info (click to toggle)
mgp 1.13a+upstream20090219-11
  • links: PTS
  • area: main
  • in suites: bullseye, buster, sid
  • size: 4,128 kB
  • sloc: ansic: 32,387; sh: 4,295; lisp: 1,405; yacc: 945; lex: 264; makefile: 158; perl: 117; awk: 9
file content (534 lines) | stat: -rw-r--r-- 13,573 bytes parent folder | download | duplicates (6)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
/*
 * Copyright (C) 1997 and 1998 WIDE Project.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the project nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */
/*
 * $Id: font.c,v 1.26 2000/12/04 09:21:27 nishida Exp $
 */

#include "mgp.h"

#ifdef VFLIB

#define VF_DESCENT	8

int vfcachesize = 3000;	/*XXX*/
#define	VFHASH_SIZE	255

static char *vf_curname;
static int vfont_fd = -1;
static int vfcinitdone;
static int vfcachecnt;
static struct vfont vfclru;
static struct vfont vfcache[VFHASH_SIZE];
#define	VFCACHE_HASH(w, h, c)	(((c ^ w) ^ h) % VFHASH_SIZE)

int vfcachehit = 0;
int vfcachemiss = 0;

static void initrevbitmap __P((void));

/*
 * revbitmap: reverse the MSB and LSB of a byte value.
 *	example: revbitmap[0x80] == 0x01, revbitmap[0x55] == 0xaa
 * leftbitmap: the index of leftmost bit in a byte value. (MSB is on the left)
 *	example: leftbitmap[0x80] == 0, leftbitmap[0x19] == 3
 * rightbitmap: the index of rightmost bit in a byte value.
 *	example: rightbitmap[0x80] == 0, rightbitmap[0x19] == 7
 */
static u_char *revbitmap = NULL;
static char *leftbitmap = NULL;
static char *rightbitmap = NULL;

static short ctable[128] = {
	0x2121, 0x2121, 0x2121, 0x2121, 0x2121, 0x2121, 0x2121, 0x2121,
	0x2121, 0x2121, 0x2121, 0x2121, 0x2121, 0x2121, 0x2121, 0x2121,
	0x2121, 0x2121, 0x2121, 0x2121, 0x2121, 0x2121, 0x2121, 0x2121,
	0x2121, 0x2121, 0x2121, 0x2121, 0x2121, 0x2121, 0x2121, 0x2121,
	0x2121, 0x212a, 0x216d, 0x2174, 0x2170, 0x2173, 0x2175, 0x216c,
	0x214a, 0x214b, 0x2176, 0x215c, 0x2124, 0x215d, 0x2125, 0x213f,
	0x2330, 0x2331, 0x2332, 0x2333, 0x2334, 0x2335, 0x2336, 0x2337,
	0x2338, 0x2339, 0x2127, 0x2128, 0x2152, 0x2161, 0x2153, 0x2129,
	0x2177, 0x2341, 0x2342, 0x2343, 0x2344, 0x2345, 0x2346, 0x2347,
	0x2348, 0x2349, 0x234a, 0x234b, 0x234c, 0x234d, 0x234e, 0x234f,
	0x2350, 0x2351, 0x2352, 0x2353, 0x2354, 0x2355, 0x2356, 0x2357,
	0x2358, 0x2359, 0x235a, 0x214e, 0x2140, 0x214f, 0x2130, 0x2132,
	0x212e, 0x2361, 0x2362, 0x2363, 0x2364, 0x2365, 0x2366, 0x2367,
	0x2368, 0x2369, 0x236a, 0x236b, 0x236c, 0x236d, 0x236e, 0x236f,
	0x2370, 0x2371, 0x2372, 0x2373, 0x2374, 0x2375, 0x2376, 0x2377,
	0x2378, 0x2379, 0x237a, 0x2150, 0x2143, 0x2151, 0x2141, 0x2121,
};

static void
initrevbitmap()
{
	int i;
	int j;
	u_char x;
	int right;
	int left;

	revbitmap = (u_char *)malloc(256 * sizeof(u_char));
	leftbitmap= (char *)malloc(256 * sizeof(char));
	rightbitmap= (char *)malloc(256 * sizeof(char));
	if (!revbitmap || !leftbitmap || !rightbitmap) {
		fprintf(stderr, "initrevbitmap: malloc failed\n");
		cleanup(-1);
	}
	for (i = 0; i < 256; i++) {
		right = left = -1;
		x = 0x00;
		for (j = 0; j < 8; j++) {
			if (i & (0x80 >> j)) {
				x |= (1 << j);
				right = j;
				if (left == -1)
					left = j;
			}
		}
		revbitmap[i] = x;
		rightbitmap[i] = right;
		leftbitmap[i] = left;
	}
}

#define	VFC_INSHASH(vfc) {						\
	struct vfont *h, *n;						\
	h = &vfcache[VFCACHE_HASH(vfc->code, vfc->width, vfc->height)];	\
	n = h->next; vfc->next = n; n->prev = vfc;			\
	h->next = vfc; vfc->prev = h;					\
}
#define	VFC_DELHASH(vfc) {						\
	struct vfont *n, *p;						\
	n = vfc->next; p = vfc->prev;					\
	n->prev = p; p->next = n;					\
}
#define	VFC_INSLRU(vfc) {						\
	struct vfont *p;						\
	p = vfclru.lruprev; vfc->lruprev = p; p->lrunext = vfc;		\
	vfclru.lruprev = vfc; vfc->lrunext = &vfclru;			\
}
#define	VFC_DELLRU(vfc) {						\
	struct vfont *n, *p;						\
	n = vfc->lrunext; p = vfc->lruprev;				\
	n->lruprev = p; p->lrunext = n;					\
}

static void
vfc_init()
{
	int i;
	struct vfont *vfc;

	vfc = vfcache;
	for (vfc = vfcache, i = 0; i < VFHASH_SIZE; vfc++, i++)
		vfc->next = vfc->prev = vfc;
	vfclru.lrunext = vfclru.lruprev = &vfclru;
	vfcinitdone++;
}

static void
vfc_free(vfc)
	struct vfont *vfc;
{
	VFC_DELHASH(vfc);
	VFC_DELLRU(vfc);
	free(vfc->dbitmap);
	free(vfc);
	vfcachecnt--;
}

static struct vfont *
vfc_lookup(code, width, height, fontname)
	u_int code, width, height;
	char *fontname;
{
	struct vfont *vfc, *hvfc;

	hvfc = &vfcache[VFCACHE_HASH(code, width, height)];
	for (vfc = hvfc->next; vfc != hvfc; vfc = vfc->next) {
		if (vfc->code == code &&
		    vfc->width == width &&
		    vfc->height == height &&
		    vfc->fontname == fontname) {
			vfcachehit++;
			VFC_DELLRU(vfc);
			VFC_INSLRU(vfc);
			return vfc;
		}
	}
	vfcachemiss++;
	return NULL;
}

static struct vfont *
vfc_alloc(code, width, height, fontname)
	u_int code, width, height;
	char *fontname;
{
	u_int rast = (width + 7) / 8;
	u_int rast2 = (width * 2 + 7) / 8;
	u_char *lbitmap;
	u_char *dbitmap;
	u_int char_len;
	struct vfont *vfc;
	u_int max_x, min_x;
	u_int ix, iy;
	u_char data, *bitmap;
	u_char *s;
	u_int bsize;
	u_int vcode;
	XImage *xim;

	bsize = rast * height;
	if (code < 128)
		vcode = ctable[code];
	else
		vcode = code;
	vfc = (struct vfont *)malloc(sizeof(*vfc));
	if (vfc == NULL) {
		fprintf(stderr, "vfc_alloc: malloc failed\n");
		cleanup(-1);
	}
	vfc->code = code;
	vfc->width = width;
	vfc->height = height;
	vfc->fontname = vf_curname;
	vfc->ref = 0;
	bitmap = (u_char *)malloc(bsize);
	if (bitmap == NULL) {
		fprintf(stderr, "vfc_alloc: malloc failed\n");
		cleanup(-1);
	}
#if 1	/* ANTIALIAS */
/*XXX: TODO: cleanup, optimization */
	lbitmap = (u_char *)malloc(rast2 * height * 2);
	dbitmap = (u_char *)malloc(width * height);
	if (lbitmap == NULL || dbitmap == NULL) {
		fprintf(stderr, "vfc_alloc: malloc failed\n");
		cleanup(-1);
	}
	memset(lbitmap, 0, rast2 * height * 2);
	VF_GetBitmap(vcode, vfont_fd, width * 2, height * 2, rast2, 0, lbitmap);

    {
	int i, j, x1, x2, y, b1, b2;
	u_char *s1, *s2, *d, *z;
	static u_char dp[] = { 0, 1, 1, 2 };

	z = dbitmap;
	d = bitmap;
	for (j = 0; j < height; j++) {
		s1 = lbitmap + rast2 * (j * 2);
		s2 = s1 + rast2;
		y = 0;
		for (i = 0, b1 = 7, b2 = 6; i < width; i++, b1--, b2 -= 2) {
			if (b1 < 0) {
				*d++ = y;
				y = 0;
				b1 = 7;
			}
			if (b2 < 0) {
				s1++, s2++;
				b2 = 6;
			}
			x1 = (*s1 >> b2) & 0x03;
			x2 = (*s2 >> b2) & 0x03;
			if (x1 | x2)
				y |= 1 << b1;
			*z++ = dp[x1] + dp[x2];
		}
		*d++ = y;
		for (i += 2; i < rast * 2; i++)
			*d++ = 0;
	}
    }
	free(lbitmap);
	vfc->dbitmap = dbitmap;
#else
	memset(bitmap, 0, bsize);
	if (!(mgp_flag & FL_OUTLINE)) {
		VF_GetBitmap(vcode, vfont_fd, width, height, rast, 0, bitmap);
	} else {  /* OR */
		u_long *vfdata;

		if ((vfdata = VF_GetOutline(vcode, vfont_fd)) == NULL) {
			fprintf(stderr, "Failed to get outline : %04x\n", vcode);
		} else {
			VF_DrawOutline(vfdata, vfont_fd, width, height, rast,
				0, bitmap);
			VF_FreeOutline(vfdata, vfont_fd);
		}
	}
#endif /*ANTIALIAS*/

	if (!revbitmap)
		initrevbitmap();

	/* compute right/left boundary */
	max_x = -1;
	min_x = -1;
	for (ix = 0; ix < rast; ix++) {
		data = 0x00;
		s = bitmap + ix;
		for (iy = 0, s = bitmap + ix; iy < height; iy++, s += rast)
			data |= *s;
		if (data) {
			max_x = ix * 8 + rightbitmap[data];
			if (min_x == -1)
				min_x = ix * 8 + leftbitmap[data];
		}
	}
	/* XXX: ".," ... */
	if (code >= 0x2121 && code <= 0x2125 && max_x < width / 2)
		max_x += width / 2;

#if 0  /* remove soon */
	xim = XCreateImage(display, visual, 1,
		XYBitmap, 0, NULL, width, height, 8, 0);
	if (xim == NULL) {
		fprintf(stderr, "vfc_alloc: XCreateImage failed\n");
		cleanup(-1);
	}
	if (xim->bitmap_bit_order == LSBFirst) {
		/* convert the bit order of image bitmap */
		for (iy = 0, s = bitmap; iy < height; iy++) {
			for (ix = 0; ix < rast; ix++, s++)
				*s = revbitmap[*s];
		}
	}
	xim->data = (char *)bitmap;
	vfc->image = xim;
#endif
	/* horizontal gap of 1 dot is included by default */
	char_len = max_x - min_x + 2;
	vfc->xoff = min_x;
	vfc->charlen = vfc->xmax = char_len;
	vfc->descent = height / VF_DESCENT;
	vfc->ascent = vfc->height - vfc->descent;

	VFC_INSHASH(vfc);
	VFC_INSLRU(vfc);
	vfcachecnt++;
	return vfc;
}

struct vfont *
vfc_get(code, width, height, force)
	u_int code, width, height;
	int force;
{
	struct vfont *vfc, *nvfc;

	/* sanity check */
	if (vf_curname == NULL)
		return NULL;

	if (!vfcinitdone)
		vfc_init();
	vfc = vfc_lookup(code, width, height, vf_curname);
	if (vfc == NULL) {
		if (vfcachecnt >= vfcachesize) {
			if (!force)
				return NULL;
			vfc = vfclru.lrunext;
			while (vfcachecnt >= vfcachesize) {
				if (vfc == &vfclru)
					break;
				nvfc = vfc->lrunext;
				if (vfc->ref == 0)
					vfc_free(vfc);
				vfc = nvfc;
			}
		}
		vfc = vfc_alloc(code, width, height, vf_curname);
	}
#if 0
	fprintf(stderr, "vfc_get: cache=%d, hit=%d, miss=%d\n",
		vfcachecnt, vfcachehit, vfcachemiss);
#endif
	return vfc;
}

void
vfc_setfont(fontname)
	char *fontname;
{
	static char *prev_vfcap;

	if ((mgp_flag & FL_NOVFLIB)) {
		return;
	}

	if (prev_vfcap != vfcap_name) {
		/*
		 * Because the string specified by %vfcap is stored in
		 * allocated area and never freed, string compare is not
		 * needed here.
		 */
		if (prev_vfcap)
			VF_Deinit();
		if (VF_Init(vfcap_name) < 0) {
			fprintf(stderr, "Error VF_Init\n");
			cleanup(-1);
		}
		prev_vfcap = vfcap_name;
		if (prev_vfcap == NULL)
			prev_vfcap = "";	/* XXX: just in case */
	}

#if 0
	if (vfont_fd >= 0)
		VF_CloseFont(vfont_fd);
#endif 

	vfont_fd = VF_OpenFont(fontname);
	vf_curname = fontname;
	if (vfont_fd < 0) {
		fprintf(stderr, "Can't open vffont %s (vfcap=%s)\n",
			fontname, vfcap_name);
		cleanup(-1);
	}
}

XImage *
vfc_image(vfc, fore, back, xim, bx, by)
	struct vfont *vfc;
	long fore, back;
	XImage *xim;
	u_int bx, by;
{
	int x, y;
	int maxx;
	static XColor col[5];
	u_char d, *s;
	u_long p;
	XColor *bcol = NULL, *bc;
	u_int charlen;

	/* offset the base position */
	by -= vfc->ascent;

	charlen = vfc->charlen;
	if (vfc->xoff + charlen > vfc->width)
		charlen = vfc->width - vfc->xoff;

	if (back == -1) {
		u_long r, g, b;
		int dots;

		dots = charlen * vfc->height;
		bcol = malloc(sizeof(XColor) * dots);
		if (bcol == NULL)
			return NULL;
		bc = bcol;
		for (y = 0; y < vfc->height; y++) {
			for (x = 0; x < charlen; x++, bc++) {
				bc->pixel = XGetPixel(xim, bx+x, by+y);
				bc->flags = DoRed|DoGreen|DoBlue;
			}
		}
		XQueryColors(display, colormap, bcol, dots);
		r = g = b = 0;
		for (y = 0; y < vfc->height; y++) {
			for (x = 0; x < charlen; x++) {
				r += bcol[x].red;
				g += bcol[x].green;
				b += bcol[x].blue;
			}
		}
		r /= dots; g /= dots; b /= dots;
		bc = &col[0];
		if (bc->red == r && bc->green == g && bc->blue == b)
			bc->pixel = back;
		else {
			bc->pixel = ~back;
			bc->red   = r; bc->green = g; bc->blue  = b;
		}
	}
	if (fore != col[4].pixel || back != col[0].pixel) {
		col[4].pixel = fore;
		col[4].flags = DoRed|DoGreen|DoBlue;
		if (back != -1) {
			col[3].pixel = back;
			col[3].flags = DoRed|DoGreen|DoBlue;
			XQueryColors(display, colormap, &col[3], 2);
			col[0] = col[3];
		} else {
			XQueryColor(display, colormap, &col[4]);
		}
		for (x = 3; x > 0; x--) {
			col[x].red   = (col[4].red  *x + col[0].red  *(4-x)) /4;
			col[x].green = (col[4].green*x + col[0].green*(4-x)) /4;
			col[x].blue  = (col[4].blue *x + col[0].blue *(4-x)) /4;
			if (!XAllocColor(display, colormap, &col[x])) {
				if (verbose)
					printf("vfc_image: cannot allocate color for level %d (using %d)\n", x, x + 1);
				col[x].pixel = col[x + 1].pixel;
			}
			else regist_alloc_colors(&font_clr, &col[x].pixel, 1);
		}
	}

	/* XXX: need optimization */
	s = vfc->dbitmap;
	bc = bcol;
	maxx = bx + charlen;
	for (y = by; y < vfc->height + by; y++) {
		s += vfc->xoff;
		for (x = bx; x < maxx; x++) {
			if ((d = *s++)) {
				p = col[d].pixel;
				XPutPixel(xim, x, y, p);
			}
		}
		s += vfc->width - (vfc->xoff + charlen);
	}
	if (mgp_flag & FL_GLYPHEDGE) {
		/*
		 * for debugging treatment of font metrics, for 16bpp displays
		 */
		/* pixmap bounding box */
		for (y = 0; y < vfc->height; y++) {
			XPutPixel(xim, bx, by + y, 0xffff);
			XPutPixel(xim, bx + charlen - 1, by + y, 0xffff);
		}
		for (x = 0; x < charlen; x++) {
			XPutPixel(xim, bx + x, by, 0xffff);
			XPutPixel(xim, bx + x, by + vfc->height - 1, 0xffff);
		}
		/* origin */
		XPutPixel(xim, bx, by, 0xaaaa);
		/* baseline */
		for (x = 0; x < vfc->width; x++)
			XPutPixel(xim, bx + vfc->xoff + x, by, 0xaaaa);
	}
	if (bcol)
		free(bcol);
	return xim;
}

#endif /* VFLIB */