Commit | Line | Data |
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c2f5bfd6 | 1 | /* ftxfont.c -- FreeType font driver on X (without using XFT). |
77ad4cfe GM |
2 | Copyright (C) 2006, 2007, 2008 Free Software Foundation, Inc. |
3 | Copyright (C) 2006, 2007, 2008 | |
c2f5bfd6 KH |
4 | National Institute of Advanced Industrial Science and Technology (AIST) |
5 | Registration Number H13PRO009 | |
6 | ||
7 | This file is part of GNU Emacs. | |
8 | ||
9ec0b715 | 9 | GNU Emacs is free software: you can redistribute it and/or modify |
c2f5bfd6 | 10 | it under the terms of the GNU General Public License as published by |
9ec0b715 GM |
11 | the Free Software Foundation, either version 3 of the License, or |
12 | (at your option) any later version. | |
c2f5bfd6 KH |
13 | |
14 | GNU Emacs is distributed in the hope that it will be useful, | |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
9ec0b715 | 20 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ |
c2f5bfd6 KH |
21 | |
22 | #include <config.h> | |
23 | #include <stdio.h> | |
24 | #include <X11/Xlib.h> | |
25 | ||
26 | #include "lisp.h" | |
27 | #include "dispextern.h" | |
28 | #include "xterm.h" | |
29 | #include "frame.h" | |
30 | #include "blockinput.h" | |
31 | #include "character.h" | |
32 | #include "charset.h" | |
33 | #include "fontset.h" | |
34 | #include "font.h" | |
35 | ||
36 | /* FTX font driver. */ | |
37 | ||
38 | static Lisp_Object Qftx; | |
39 | ||
40 | /* Prototypes for helper function. */ | |
00c37e18 KH |
41 | static GC *ftxfont_get_gcs P_ ((FRAME_PTR, unsigned long, unsigned long)); |
42 | static int ftxfont_draw_bitmap P_ ((FRAME_PTR, GC, GC *, struct font *, | |
43 | unsigned, int, int, XPoint *, int, int *, | |
44 | int)); | |
c2f5bfd6 KH |
45 | static void ftxfont_draw_backgrond P_ ((FRAME_PTR, struct font *, GC, |
46 | int, int, int)); | |
056360d0 | 47 | |
00c37e18 KH |
48 | struct ftxfont_frame_data |
49 | { | |
50 | /* Background and foreground colors. */ | |
51 | XColor colors[2]; | |
52 | /* GCs interporationg the above colors. gcs[0] is for a color | |
53 | closest to BACKGROUND, and gcs[5] is for a color closest to | |
54 | FOREGROUND. */ | |
55 | GC gcs[6]; | |
56 | struct ftxfont_frame_data *next; | |
57 | }; | |
056360d0 | 58 | |
00c37e18 KH |
59 | |
60 | /* Return an array of 6 GCs for antialiasing. */ | |
61 | ||
62 | static GC * | |
63 | ftxfont_get_gcs (f, foreground, background) | |
056360d0 | 64 | FRAME_PTR f; |
056360d0 KH |
65 | unsigned long foreground, background; |
66 | { | |
00c37e18 | 67 | XColor color; |
056360d0 KH |
68 | XGCValues xgcv; |
69 | int i; | |
00c37e18 KH |
70 | struct ftxfont_frame_data *data = font_get_frame_data (f, &ftxfont_driver); |
71 | struct ftxfont_frame_data *prev = NULL, *this = NULL, *new; | |
056360d0 | 72 | |
00c37e18 KH |
73 | if (data) |
74 | { | |
75 | for (this = data; this; prev = this, this = this->next) | |
76 | { | |
77 | if (this->colors[0].pixel < background) | |
78 | continue; | |
79 | if (this->colors[0].pixel > background) | |
80 | break; | |
81 | if (this->colors[1].pixel < foreground) | |
82 | continue; | |
83 | if (this->colors[1].pixel > foreground) | |
84 | break; | |
85 | return this->gcs; | |
86 | } | |
87 | } | |
88 | ||
89 | new = malloc (sizeof (struct ftxfont_frame_data)); | |
90 | if (! new) | |
91 | return NULL; | |
92 | new->next = this; | |
93 | if (prev) | |
94 | { | |
95 | prev->next = new; | |
96 | } | |
97 | else if (font_put_frame_data (f, &ftxfont_driver, new) < 0) | |
98 | { | |
99 | free (new); | |
100 | return NULL; | |
101 | } | |
102 | ||
103 | new->colors[0].pixel = background; | |
104 | new->colors[1].pixel = foreground; | |
056360d0 KH |
105 | |
106 | BLOCK_INPUT; | |
00c37e18 | 107 | XQueryColors (FRAME_X_DISPLAY (f), FRAME_X_COLORMAP (f), new->colors, 2); |
056360d0 KH |
108 | for (i = 1; i < 7; i++) |
109 | { | |
00c37e18 KH |
110 | /* Interpolate colors linearly. Any better algorithm? */ |
111 | color.red | |
112 | = (new->colors[1].red * i + new->colors[0].red * (8 - i)) / 8; | |
113 | color.green | |
114 | = (new->colors[1].green * i + new->colors[0].green * (8 - i)) / 8; | |
115 | color.blue | |
116 | = (new->colors[1].blue * i + new->colors[0].blue * (8 - i)) / 8; | |
117 | if (! x_alloc_nearest_color (f, FRAME_X_COLORMAP (f), &color)) | |
056360d0 | 118 | break; |
00c37e18 KH |
119 | xgcv.foreground = color.pixel; |
120 | new->gcs[i - 1] = XCreateGC (FRAME_X_DISPLAY (f), FRAME_X_WINDOW (f), | |
121 | GCForeground, &xgcv); | |
056360d0 KH |
122 | } |
123 | UNBLOCK_INPUT; | |
124 | ||
125 | if (i < 7) | |
126 | { | |
127 | BLOCK_INPUT; | |
128 | for (i--; i >= 0; i--) | |
00c37e18 | 129 | XFreeGC (FRAME_X_DISPLAY (f), new->gcs[i]); |
056360d0 | 130 | UNBLOCK_INPUT; |
00c37e18 KH |
131 | if (prev) |
132 | prev->next = new->next; | |
133 | else if (data) | |
134 | font_put_frame_data (f, &ftxfont_driver, new->next); | |
135 | free (new); | |
136 | return NULL; | |
056360d0 | 137 | } |
00c37e18 | 138 | return new->gcs; |
056360d0 | 139 | } |
c2f5bfd6 KH |
140 | |
141 | static int | |
00c37e18 | 142 | ftxfont_draw_bitmap (f, gc_fore, gcs, font, code, x, y, p, size, n, flush) |
c2f5bfd6 | 143 | FRAME_PTR f; |
00c37e18 | 144 | GC gc_fore, *gcs; |
c2f5bfd6 KH |
145 | struct font *font; |
146 | unsigned code; | |
147 | int x, y; | |
148 | XPoint *p; | |
149 | int size, *n; | |
00c37e18 | 150 | int flush; |
c2f5bfd6 KH |
151 | { |
152 | struct font_bitmap bitmap; | |
153 | unsigned char *b; | |
154 | int i, j; | |
155 | ||
056360d0 | 156 | if (ftfont_driver.get_bitmap (font, code, &bitmap, size > 0x100 ? 1 : 8) < 0) |
c2f5bfd6 | 157 | return 0; |
00c37e18 | 158 | if (size > 0x100) |
c2f5bfd6 | 159 | { |
00c37e18 KH |
160 | for (i = 0, b = bitmap.buffer; i < bitmap.rows; |
161 | i++, b += bitmap.pitch) | |
c2f5bfd6 KH |
162 | { |
163 | for (j = 0; j < bitmap.width; j++) | |
164 | if (b[j / 8] & (1 << (7 - (j % 8)))) | |
165 | { | |
166 | p[n[0]].x = x + bitmap.left + j; | |
167 | p[n[0]].y = y - bitmap.top + i; | |
00c37e18 | 168 | if (++n[0] == size) |
c2f5bfd6 KH |
169 | { |
170 | XDrawPoints (FRAME_X_DISPLAY (f), FRAME_X_WINDOW (f), | |
00c37e18 | 171 | gc_fore, p, size, CoordModeOrigin); |
c2f5bfd6 KH |
172 | n[0] = 0; |
173 | } | |
174 | } | |
175 | } | |
00c37e18 KH |
176 | if (flush && n[0] > 0) |
177 | XDrawPoints (FRAME_X_DISPLAY (f), FRAME_X_WINDOW (f), | |
178 | gc_fore, p, n[0], CoordModeOrigin); | |
179 | } | |
180 | else | |
181 | { | |
182 | for (i = 0, b = bitmap.buffer; i < bitmap.rows; | |
183 | i++, b += bitmap.pitch) | |
c2f5bfd6 KH |
184 | { |
185 | for (j = 0; j < bitmap.width; j++) | |
186 | { | |
00c37e18 KH |
187 | int idx = (bitmap.bits_per_pixel == 1 |
188 | ? ((b[j / 8] & (1 << (7 - (j % 8)))) ? 6 : -1) | |
189 | : (b[j] >> 5) - 1); | |
c2f5bfd6 KH |
190 | |
191 | if (idx >= 0) | |
192 | { | |
193 | XPoint *pp = p + size * idx; | |
194 | ||
195 | pp[n[idx]].x = x + bitmap.left + j; | |
196 | pp[n[idx]].y = y - bitmap.top + i; | |
00c37e18 | 197 | if (++(n[idx]) == size) |
c2f5bfd6 KH |
198 | { |
199 | XDrawPoints (FRAME_X_DISPLAY (f), FRAME_X_WINDOW (f), | |
00c37e18 KH |
200 | idx == 6 ? gc_fore : gcs[idx], pp, size, |
201 | CoordModeOrigin); | |
c2f5bfd6 KH |
202 | n[idx] = 0; |
203 | } | |
204 | } | |
205 | } | |
206 | } | |
00c37e18 KH |
207 | if (flush) |
208 | { | |
209 | for (i = 0; i < 6; i++) | |
210 | if (n[i] > 0) | |
211 | XDrawPoints (FRAME_X_DISPLAY (f), FRAME_X_WINDOW (f), | |
212 | gcs[i], p + 0x100 * i, n[i], CoordModeOrigin); | |
213 | if (n[6] > 0) | |
214 | XDrawPoints (FRAME_X_DISPLAY (f), FRAME_X_WINDOW (f), | |
215 | gc_fore, p + 0x600, n[6], CoordModeOrigin); | |
216 | } | |
c2f5bfd6 KH |
217 | } |
218 | ||
219 | if (ftfont_driver.free_bitmap) | |
220 | ftfont_driver.free_bitmap (font, &bitmap); | |
221 | ||
222 | return bitmap.advance; | |
223 | } | |
224 | ||
225 | static void | |
226 | ftxfont_draw_backgrond (f, font, gc, x, y, width) | |
227 | FRAME_PTR f; | |
228 | struct font *font; | |
229 | GC gc; | |
230 | int x, y, width; | |
231 | { | |
232 | XGCValues xgcv; | |
233 | ||
234 | XGetGCValues (FRAME_X_DISPLAY (f), gc, | |
235 | GCForeground | GCBackground, &xgcv); | |
236 | XSetForeground (FRAME_X_DISPLAY (f), gc, xgcv.background); | |
237 | XFillRectangle (FRAME_X_DISPLAY (f), FRAME_X_WINDOW (f), gc, | |
056360d0 | 238 | x, y - font->ascent, width, y + font->descent); |
c2f5bfd6 KH |
239 | XSetForeground (FRAME_X_DISPLAY (f), gc, xgcv.foreground); |
240 | } | |
241 | ||
242 | /* Prototypes for font-driver methods. */ | |
243 | static Lisp_Object ftxfont_list P_ ((Lisp_Object, Lisp_Object)); | |
3a91626c | 244 | static Lisp_Object ftxfont_match P_ ((Lisp_Object, Lisp_Object)); |
a952e54c | 245 | static Lisp_Object ftxfont_open P_ ((FRAME_PTR, Lisp_Object, int)); |
c2f5bfd6 | 246 | static void ftxfont_close P_ ((FRAME_PTR, struct font *)); |
c2f5bfd6 KH |
247 | static int ftxfont_draw P_ ((struct glyph_string *, int, int, int, int, int)); |
248 | ||
249 | struct font_driver ftxfont_driver; | |
250 | ||
251 | static Lisp_Object | |
252 | ftxfont_list (frame, spec) | |
253 | Lisp_Object frame; | |
254 | Lisp_Object spec; | |
255 | { | |
a952e54c | 256 | Lisp_Object list = ftfont_driver.list (frame, spec), tail; |
c2f5bfd6 | 257 | |
a952e54c KH |
258 | for (tail = list; CONSP (tail); tail = XCDR (tail)) |
259 | ASET (XCAR (tail), FONT_TYPE_INDEX, Qftx); | |
260 | return list; | |
c2f5bfd6 KH |
261 | } |
262 | ||
3a91626c KH |
263 | static Lisp_Object |
264 | ftxfont_match (frame, spec) | |
265 | Lisp_Object frame; | |
266 | Lisp_Object spec; | |
267 | { | |
268 | Lisp_Object entity = ftfont_driver.match (frame, spec); | |
269 | ||
270 | if (VECTORP (entity)) | |
271 | ASET (entity, FONT_TYPE_INDEX, Qftx); | |
272 | return entity; | |
273 | } | |
274 | ||
a952e54c | 275 | static Lisp_Object |
c2f5bfd6 KH |
276 | ftxfont_open (f, entity, pixel_size) |
277 | FRAME_PTR f; | |
278 | Lisp_Object entity; | |
279 | int pixel_size; | |
280 | { | |
a952e54c | 281 | Lisp_Object font_object; |
c2f5bfd6 | 282 | struct font *font; |
c2f5bfd6 | 283 | |
a952e54c KH |
284 | font_object = ftfont_driver.open (f, entity, pixel_size); |
285 | if (NILP (font_object)) | |
286 | return Qnil; | |
287 | font = XFONT_OBJECT (font_object); | |
288 | font->driver = &ftxfont_driver; | |
289 | return font_object; | |
c2f5bfd6 KH |
290 | } |
291 | ||
292 | static void | |
293 | ftxfont_close (f, font) | |
294 | FRAME_PTR f; | |
295 | struct font *font; | |
296 | { | |
297 | ftfont_driver.close (f, font); | |
c2f5bfd6 KH |
298 | } |
299 | ||
c2f5bfd6 KH |
300 | static int |
301 | ftxfont_draw (s, from, to, x, y, with_background) | |
302 | struct glyph_string *s; | |
303 | int from, to, x, y, with_background; | |
304 | { | |
305 | FRAME_PTR f = s->f; | |
306 | struct face *face = s->face; | |
a952e54c | 307 | struct font *font = s->font; |
c2f5bfd6 KH |
308 | XPoint p[0x700]; |
309 | int n[7]; | |
310 | unsigned *code; | |
311 | int len = to - from; | |
312 | int i; | |
056360d0 | 313 | GC *gcs; |
b9c2785e | 314 | int xadvance; |
c2f5bfd6 KH |
315 | |
316 | n[0] = n[1] = n[2] = n[3] = n[4] = n[5] = n[6] = 0; | |
317 | ||
318 | BLOCK_INPUT; | |
c2f5bfd6 KH |
319 | if (with_background) |
320 | ftxfont_draw_backgrond (f, font, s->gc, x, y, s->width); | |
321 | code = alloca (sizeof (unsigned) * len); | |
322 | for (i = 0; i < len; i++) | |
323 | code[i] = ((XCHAR2B_BYTE1 (s->char2b + from + i) << 8) | |
324 | | XCHAR2B_BYTE2 (s->char2b + from + i)); | |
325 | ||
00c37e18 KH |
326 | if (face->gc == s->gc) |
327 | { | |
328 | gcs = ftxfont_get_gcs (f, face->foreground, face->background); | |
329 | } | |
330 | else | |
c2f5bfd6 | 331 | { |
056360d0 KH |
332 | XGCValues xgcv; |
333 | unsigned long mask = GCForeground | GCBackground; | |
334 | ||
056360d0 | 335 | XGetGCValues (FRAME_X_DISPLAY (f), s->gc, mask, &xgcv); |
00c37e18 | 336 | gcs = ftxfont_get_gcs (f, xgcv.foreground, xgcv.background); |
056360d0 KH |
337 | } |
338 | ||
00c37e18 | 339 | if (gcs) |
056360d0 | 340 | { |
00c37e18 KH |
341 | if (s->num_clips) |
342 | for (i = 0; i < 6; i++) | |
343 | XSetClipRectangles (FRAME_X_DISPLAY (f), gcs[i], 0, 0, | |
344 | s->clip, s->num_clips, Unsorted); | |
345 | ||
c2f5bfd6 | 346 | for (i = 0; i < len; i++) |
b9c2785e KH |
347 | { |
348 | xadvance = ftxfont_draw_bitmap (f, s->gc, gcs, font, code[i], x, y, | |
349 | p, 0x100, n, i + 1 == len); | |
350 | x += (s->padding_p ? 1 : xadvance); | |
351 | } | |
00c37e18 KH |
352 | if (s->num_clips) |
353 | for (i = 0; i < 6; i++) | |
354 | XSetClipMask (FRAME_X_DISPLAY (f), gcs[i], None); | |
c2f5bfd6 KH |
355 | } |
356 | else | |
357 | { | |
00c37e18 KH |
358 | /* We can't draw with antialiasing. |
359 | s->gc should already have a proper clipping setting. */ | |
c2f5bfd6 | 360 | for (i = 0; i < len; i++) |
b9c2785e KH |
361 | { |
362 | xadvance = ftxfont_draw_bitmap (f, s->gc, NULL, font, code[i], x, y, | |
363 | p, 0x700, n, i + 1 == len); | |
364 | x += (s->padding_p ? 1 : xadvance); | |
365 | } | |
c2f5bfd6 KH |
366 | } |
367 | ||
368 | UNBLOCK_INPUT; | |
369 | ||
370 | return len; | |
371 | } | |
372 | ||
00c37e18 KH |
373 | static int |
374 | ftxfont_end_for_frame (f) | |
375 | FRAME_PTR f; | |
376 | { | |
377 | struct ftxfont_frame_data *data = font_get_frame_data (f, &ftxfont_driver); | |
378 | ||
379 | BLOCK_INPUT; | |
380 | while (data) | |
381 | { | |
382 | struct ftxfont_frame_data *next = data->next; | |
383 | int i; | |
384 | ||
b9217c57 | 385 | for (i = 0; i < 6; i++) |
00c37e18 KH |
386 | XFreeGC (FRAME_X_DISPLAY (f), data->gcs[i]); |
387 | free (data); | |
388 | data = next; | |
389 | } | |
390 | UNBLOCK_INPUT; | |
559474f1 | 391 | font_put_frame_data (f, &ftxfont_driver, NULL); |
00c37e18 KH |
392 | return 0; |
393 | } | |
394 | ||
c2f5bfd6 KH |
395 | \f |
396 | ||
397 | void | |
398 | syms_of_ftxfont () | |
399 | { | |
400 | DEFSYM (Qftx, "ftx"); | |
401 | ||
402 | ftxfont_driver = ftfont_driver; | |
403 | ftxfont_driver.type = Qftx; | |
404 | ftxfont_driver.list = ftxfont_list; | |
3a91626c | 405 | ftxfont_driver.match = ftxfont_match; |
c2f5bfd6 KH |
406 | ftxfont_driver.open = ftxfont_open; |
407 | ftxfont_driver.close = ftxfont_close; | |
c2f5bfd6 | 408 | ftxfont_driver.draw = ftxfont_draw; |
00c37e18 | 409 | ftxfont_driver.end_for_frame = ftxfont_end_for_frame; |
c2f5bfd6 KH |
410 | register_font_driver (&ftxfont_driver, NULL); |
411 | } | |
885b7d09 MB |
412 | |
413 | /* arch-tag: 59bd3469-5330-413f-b29d-1aa36492abe8 | |
414 | (do not change this comment) */ |