Commit | Line | Data |
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c2f5bfd6 | 1 | /* ftxfont.c -- FreeType font driver on X (without using XFT). |
acaf905b | 2 | Copyright (C) 2006-2012 Free Software Foundation, Inc. |
5df4f04c | 3 | Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011 |
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 | ||
1675728f PE |
40 | #if defined HAVE_XFT || !defined HAVE_FREETYPE |
41 | static | |
42 | #endif | |
43 | struct font_driver ftxfont_driver; | |
44 | ||
00c37e18 KH |
45 | struct ftxfont_frame_data |
46 | { | |
47 | /* Background and foreground colors. */ | |
48 | XColor colors[2]; | |
53964682 | 49 | /* GCs interpolating the above colors. gcs[0] is for a color |
00c37e18 KH |
50 | closest to BACKGROUND, and gcs[5] is for a color closest to |
51 | FOREGROUND. */ | |
52 | GC gcs[6]; | |
53 | struct ftxfont_frame_data *next; | |
54 | }; | |
056360d0 | 55 | |
00c37e18 KH |
56 | |
57 | /* Return an array of 6 GCs for antialiasing. */ | |
58 | ||
59 | static GC * | |
971de7fb | 60 | ftxfont_get_gcs (FRAME_PTR f, long unsigned int foreground, long unsigned int background) |
056360d0 | 61 | { |
00c37e18 | 62 | XColor color; |
056360d0 KH |
63 | XGCValues xgcv; |
64 | int i; | |
00c37e18 KH |
65 | struct ftxfont_frame_data *data = font_get_frame_data (f, &ftxfont_driver); |
66 | struct ftxfont_frame_data *prev = NULL, *this = NULL, *new; | |
056360d0 | 67 | |
00c37e18 KH |
68 | if (data) |
69 | { | |
70 | for (this = data; this; prev = this, this = this->next) | |
71 | { | |
72 | if (this->colors[0].pixel < background) | |
73 | continue; | |
74 | if (this->colors[0].pixel > background) | |
75 | break; | |
76 | if (this->colors[1].pixel < foreground) | |
77 | continue; | |
78 | if (this->colors[1].pixel > foreground) | |
79 | break; | |
80 | return this->gcs; | |
81 | } | |
82 | } | |
83 | ||
38182d90 | 84 | new = malloc (sizeof *new); |
00c37e18 KH |
85 | if (! new) |
86 | return NULL; | |
87 | new->next = this; | |
88 | if (prev) | |
89 | { | |
90 | prev->next = new; | |
91 | } | |
92 | else if (font_put_frame_data (f, &ftxfont_driver, new) < 0) | |
93 | { | |
94 | free (new); | |
95 | return NULL; | |
96 | } | |
97 | ||
98 | new->colors[0].pixel = background; | |
99 | new->colors[1].pixel = foreground; | |
056360d0 KH |
100 | |
101 | BLOCK_INPUT; | |
00c37e18 | 102 | XQueryColors (FRAME_X_DISPLAY (f), FRAME_X_COLORMAP (f), new->colors, 2); |
056360d0 KH |
103 | for (i = 1; i < 7; i++) |
104 | { | |
00c37e18 KH |
105 | /* Interpolate colors linearly. Any better algorithm? */ |
106 | color.red | |
107 | = (new->colors[1].red * i + new->colors[0].red * (8 - i)) / 8; | |
108 | color.green | |
109 | = (new->colors[1].green * i + new->colors[0].green * (8 - i)) / 8; | |
110 | color.blue | |
111 | = (new->colors[1].blue * i + new->colors[0].blue * (8 - i)) / 8; | |
112 | if (! x_alloc_nearest_color (f, FRAME_X_COLORMAP (f), &color)) | |
056360d0 | 113 | break; |
00c37e18 KH |
114 | xgcv.foreground = color.pixel; |
115 | new->gcs[i - 1] = XCreateGC (FRAME_X_DISPLAY (f), FRAME_X_WINDOW (f), | |
116 | GCForeground, &xgcv); | |
056360d0 KH |
117 | } |
118 | UNBLOCK_INPUT; | |
119 | ||
120 | if (i < 7) | |
121 | { | |
122 | BLOCK_INPUT; | |
123 | for (i--; i >= 0; i--) | |
00c37e18 | 124 | XFreeGC (FRAME_X_DISPLAY (f), new->gcs[i]); |
056360d0 | 125 | UNBLOCK_INPUT; |
00c37e18 KH |
126 | if (prev) |
127 | prev->next = new->next; | |
128 | else if (data) | |
129 | font_put_frame_data (f, &ftxfont_driver, new->next); | |
130 | free (new); | |
131 | return NULL; | |
056360d0 | 132 | } |
00c37e18 | 133 | return new->gcs; |
056360d0 | 134 | } |
c2f5bfd6 KH |
135 | |
136 | static int | |
a864ef14 PE |
137 | ftxfont_draw_bitmap (FRAME_PTR f, GC gc_fore, GC *gcs, struct font *font, |
138 | unsigned int code, int x, int y, XPoint *p, int size, | |
139 | int *n, bool flush) | |
c2f5bfd6 KH |
140 | { |
141 | struct font_bitmap bitmap; | |
142 | unsigned char *b; | |
143 | int i, j; | |
144 | ||
056360d0 | 145 | if (ftfont_driver.get_bitmap (font, code, &bitmap, size > 0x100 ? 1 : 8) < 0) |
c2f5bfd6 | 146 | return 0; |
00c37e18 | 147 | if (size > 0x100) |
c2f5bfd6 | 148 | { |
00c37e18 KH |
149 | for (i = 0, b = bitmap.buffer; i < bitmap.rows; |
150 | i++, b += bitmap.pitch) | |
c2f5bfd6 KH |
151 | { |
152 | for (j = 0; j < bitmap.width; j++) | |
153 | if (b[j / 8] & (1 << (7 - (j % 8)))) | |
154 | { | |
155 | p[n[0]].x = x + bitmap.left + j; | |
156 | p[n[0]].y = y - bitmap.top + i; | |
00c37e18 | 157 | if (++n[0] == size) |
c2f5bfd6 KH |
158 | { |
159 | XDrawPoints (FRAME_X_DISPLAY (f), FRAME_X_WINDOW (f), | |
00c37e18 | 160 | gc_fore, p, size, CoordModeOrigin); |
c2f5bfd6 KH |
161 | n[0] = 0; |
162 | } | |
163 | } | |
164 | } | |
00c37e18 KH |
165 | if (flush && n[0] > 0) |
166 | XDrawPoints (FRAME_X_DISPLAY (f), FRAME_X_WINDOW (f), | |
167 | gc_fore, p, n[0], CoordModeOrigin); | |
168 | } | |
169 | else | |
170 | { | |
171 | for (i = 0, b = bitmap.buffer; i < bitmap.rows; | |
172 | i++, b += bitmap.pitch) | |
c2f5bfd6 KH |
173 | { |
174 | for (j = 0; j < bitmap.width; j++) | |
175 | { | |
00c37e18 KH |
176 | int idx = (bitmap.bits_per_pixel == 1 |
177 | ? ((b[j / 8] & (1 << (7 - (j % 8)))) ? 6 : -1) | |
178 | : (b[j] >> 5) - 1); | |
c2f5bfd6 KH |
179 | |
180 | if (idx >= 0) | |
181 | { | |
182 | XPoint *pp = p + size * idx; | |
183 | ||
184 | pp[n[idx]].x = x + bitmap.left + j; | |
185 | pp[n[idx]].y = y - bitmap.top + i; | |
00c37e18 | 186 | if (++(n[idx]) == size) |
c2f5bfd6 KH |
187 | { |
188 | XDrawPoints (FRAME_X_DISPLAY (f), FRAME_X_WINDOW (f), | |
00c37e18 KH |
189 | idx == 6 ? gc_fore : gcs[idx], pp, size, |
190 | CoordModeOrigin); | |
c2f5bfd6 KH |
191 | n[idx] = 0; |
192 | } | |
193 | } | |
194 | } | |
195 | } | |
00c37e18 KH |
196 | if (flush) |
197 | { | |
198 | for (i = 0; i < 6; i++) | |
199 | if (n[i] > 0) | |
200 | XDrawPoints (FRAME_X_DISPLAY (f), FRAME_X_WINDOW (f), | |
201 | gcs[i], p + 0x100 * i, n[i], CoordModeOrigin); | |
202 | if (n[6] > 0) | |
203 | XDrawPoints (FRAME_X_DISPLAY (f), FRAME_X_WINDOW (f), | |
204 | gc_fore, p + 0x600, n[6], CoordModeOrigin); | |
205 | } | |
c2f5bfd6 KH |
206 | } |
207 | ||
208 | if (ftfont_driver.free_bitmap) | |
209 | ftfont_driver.free_bitmap (font, &bitmap); | |
210 | ||
211 | return bitmap.advance; | |
212 | } | |
213 | ||
214 | static void | |
fa463103 PE |
215 | ftxfont_draw_background (FRAME_PTR f, struct font *font, GC gc, int x, int y, |
216 | int width) | |
c2f5bfd6 KH |
217 | { |
218 | XGCValues xgcv; | |
219 | ||
220 | XGetGCValues (FRAME_X_DISPLAY (f), gc, | |
221 | GCForeground | GCBackground, &xgcv); | |
222 | XSetForeground (FRAME_X_DISPLAY (f), gc, xgcv.background); | |
223 | XFillRectangle (FRAME_X_DISPLAY (f), FRAME_X_WINDOW (f), gc, | |
ab193662 | 224 | x, y - FONT_BASE (font), width, FONT_HEIGHT (font)); |
c2f5bfd6 KH |
225 | XSetForeground (FRAME_X_DISPLAY (f), gc, xgcv.foreground); |
226 | } | |
227 | ||
c2f5bfd6 | 228 | static Lisp_Object |
971de7fb | 229 | ftxfont_list (Lisp_Object frame, Lisp_Object spec) |
c2f5bfd6 | 230 | { |
a952e54c | 231 | Lisp_Object list = ftfont_driver.list (frame, spec), tail; |
1675728f | 232 | |
a952e54c KH |
233 | for (tail = list; CONSP (tail); tail = XCDR (tail)) |
234 | ASET (XCAR (tail), FONT_TYPE_INDEX, Qftx); | |
235 | return list; | |
c2f5bfd6 KH |
236 | } |
237 | ||
3a91626c | 238 | static Lisp_Object |
971de7fb | 239 | ftxfont_match (Lisp_Object frame, Lisp_Object spec) |
3a91626c KH |
240 | { |
241 | Lisp_Object entity = ftfont_driver.match (frame, spec); | |
242 | ||
243 | if (VECTORP (entity)) | |
244 | ASET (entity, FONT_TYPE_INDEX, Qftx); | |
245 | return entity; | |
246 | } | |
247 | ||
a952e54c | 248 | static Lisp_Object |
971de7fb | 249 | ftxfont_open (FRAME_PTR f, Lisp_Object entity, int pixel_size) |
c2f5bfd6 | 250 | { |
a952e54c | 251 | Lisp_Object font_object; |
c2f5bfd6 | 252 | struct font *font; |
c2f5bfd6 | 253 | |
a952e54c KH |
254 | font_object = ftfont_driver.open (f, entity, pixel_size); |
255 | if (NILP (font_object)) | |
256 | return Qnil; | |
257 | font = XFONT_OBJECT (font_object); | |
258 | font->driver = &ftxfont_driver; | |
259 | return font_object; | |
c2f5bfd6 KH |
260 | } |
261 | ||
262 | static void | |
971de7fb | 263 | ftxfont_close (FRAME_PTR f, struct font *font) |
c2f5bfd6 KH |
264 | { |
265 | ftfont_driver.close (f, font); | |
c2f5bfd6 KH |
266 | } |
267 | ||
c2f5bfd6 | 268 | static int |
a864ef14 PE |
269 | ftxfont_draw (struct glyph_string *s, int from, int to, int x, int y, |
270 | bool with_background) | |
c2f5bfd6 KH |
271 | { |
272 | FRAME_PTR f = s->f; | |
273 | struct face *face = s->face; | |
a952e54c | 274 | struct font *font = s->font; |
c2f5bfd6 KH |
275 | XPoint p[0x700]; |
276 | int n[7]; | |
277 | unsigned *code; | |
278 | int len = to - from; | |
279 | int i; | |
056360d0 | 280 | GC *gcs; |
b9c2785e | 281 | int xadvance; |
c2f5bfd6 KH |
282 | |
283 | n[0] = n[1] = n[2] = n[3] = n[4] = n[5] = n[6] = 0; | |
284 | ||
285 | BLOCK_INPUT; | |
c2f5bfd6 | 286 | if (with_background) |
fa463103 | 287 | ftxfont_draw_background (f, font, s->gc, x, y, s->width); |
c2f5bfd6 KH |
288 | code = alloca (sizeof (unsigned) * len); |
289 | for (i = 0; i < len; i++) | |
290 | code[i] = ((XCHAR2B_BYTE1 (s->char2b + from + i) << 8) | |
291 | | XCHAR2B_BYTE2 (s->char2b + from + i)); | |
292 | ||
00c37e18 KH |
293 | if (face->gc == s->gc) |
294 | { | |
295 | gcs = ftxfont_get_gcs (f, face->foreground, face->background); | |
296 | } | |
297 | else | |
c2f5bfd6 | 298 | { |
056360d0 KH |
299 | XGCValues xgcv; |
300 | unsigned long mask = GCForeground | GCBackground; | |
301 | ||
056360d0 | 302 | XGetGCValues (FRAME_X_DISPLAY (f), s->gc, mask, &xgcv); |
00c37e18 | 303 | gcs = ftxfont_get_gcs (f, xgcv.foreground, xgcv.background); |
056360d0 KH |
304 | } |
305 | ||
00c37e18 | 306 | if (gcs) |
056360d0 | 307 | { |
00c37e18 KH |
308 | if (s->num_clips) |
309 | for (i = 0; i < 6; i++) | |
310 | XSetClipRectangles (FRAME_X_DISPLAY (f), gcs[i], 0, 0, | |
311 | s->clip, s->num_clips, Unsorted); | |
312 | ||
c2f5bfd6 | 313 | for (i = 0; i < len; i++) |
b9c2785e KH |
314 | { |
315 | xadvance = ftxfont_draw_bitmap (f, s->gc, gcs, font, code[i], x, y, | |
316 | p, 0x100, n, i + 1 == len); | |
317 | x += (s->padding_p ? 1 : xadvance); | |
318 | } | |
00c37e18 KH |
319 | if (s->num_clips) |
320 | for (i = 0; i < 6; i++) | |
321 | XSetClipMask (FRAME_X_DISPLAY (f), gcs[i], None); | |
c2f5bfd6 KH |
322 | } |
323 | else | |
324 | { | |
00c37e18 KH |
325 | /* We can't draw with antialiasing. |
326 | s->gc should already have a proper clipping setting. */ | |
c2f5bfd6 | 327 | for (i = 0; i < len; i++) |
b9c2785e KH |
328 | { |
329 | xadvance = ftxfont_draw_bitmap (f, s->gc, NULL, font, code[i], x, y, | |
330 | p, 0x700, n, i + 1 == len); | |
331 | x += (s->padding_p ? 1 : xadvance); | |
332 | } | |
c2f5bfd6 KH |
333 | } |
334 | ||
335 | UNBLOCK_INPUT; | |
336 | ||
337 | return len; | |
338 | } | |
339 | ||
00c37e18 | 340 | static int |
971de7fb | 341 | ftxfont_end_for_frame (FRAME_PTR f) |
00c37e18 KH |
342 | { |
343 | struct ftxfont_frame_data *data = font_get_frame_data (f, &ftxfont_driver); | |
1675728f | 344 | |
00c37e18 KH |
345 | BLOCK_INPUT; |
346 | while (data) | |
347 | { | |
348 | struct ftxfont_frame_data *next = data->next; | |
349 | int i; | |
1675728f | 350 | |
b9217c57 | 351 | for (i = 0; i < 6; i++) |
00c37e18 KH |
352 | XFreeGC (FRAME_X_DISPLAY (f), data->gcs[i]); |
353 | free (data); | |
354 | data = next; | |
355 | } | |
356 | UNBLOCK_INPUT; | |
559474f1 | 357 | font_put_frame_data (f, &ftxfont_driver, NULL); |
00c37e18 KH |
358 | return 0; |
359 | } | |
360 | ||
c2f5bfd6 KH |
361 | \f |
362 | ||
363 | void | |
971de7fb | 364 | syms_of_ftxfont (void) |
c2f5bfd6 KH |
365 | { |
366 | DEFSYM (Qftx, "ftx"); | |
367 | ||
368 | ftxfont_driver = ftfont_driver; | |
369 | ftxfont_driver.type = Qftx; | |
370 | ftxfont_driver.list = ftxfont_list; | |
3a91626c | 371 | ftxfont_driver.match = ftxfont_match; |
c2f5bfd6 KH |
372 | ftxfont_driver.open = ftxfont_open; |
373 | ftxfont_driver.close = ftxfont_close; | |
c2f5bfd6 | 374 | ftxfont_driver.draw = ftxfont_draw; |
00c37e18 | 375 | ftxfont_driver.end_for_frame = ftxfont_end_for_frame; |
c2f5bfd6 KH |
376 | register_font_driver (&ftxfont_driver, NULL); |
377 | } |