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Commit | Line | Data |
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1e901a75 | 1 | /* font.c - Font API and font file loader. */ |
2 | /* | |
3 | * GRUB -- GRand Unified Bootloader | |
d1fb0f65 | 4 | * Copyright (C) 2003,2005,2006,2007,2008,2009,2010 Free Software Foundation, Inc. |
1e901a75 | 5 | * |
6 | * GRUB is free software: you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation, either version 3 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * GRUB is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with GRUB. If not, see <http://www.gnu.org/licenses/>. | |
18 | */ | |
19 | ||
20 | #include <grub/bufio.h> | |
21 | #include <grub/dl.h> | |
22 | #include <grub/file.h> | |
23 | #include <grub/font.h> | |
24 | #include <grub/misc.h> | |
25 | #include <grub/mm.h> | |
26 | #include <grub/types.h> | |
27 | #include <grub/video.h> | |
28 | #include <grub/bitmap.h> | |
f0cfb703 | 29 | #include <grub/charset.h> |
72f12cdc | 30 | #include <grub/unicode.h> |
de0b7a4e | 31 | #include <grub/fontformat.h> |
274416e8 | 32 | #include <grub/env.h> |
1e901a75 | 33 | |
e745cf0c VS |
34 | GRUB_MOD_LICENSE ("GPLv3+"); |
35 | ||
d0230c21 | 36 | #ifdef USE_ASCII_FAILBACK |
26ba5c22 | 37 | #include "ascii.h" |
38 | #endif | |
1e901a75 | 39 | |
40 | #ifndef FONT_DEBUG | |
41 | #define FONT_DEBUG 0 | |
42 | #endif | |
43 | ||
44 | struct char_index_entry | |
45 | { | |
46 | grub_uint32_t code; | |
47 | grub_uint8_t storage_flags; | |
48 | grub_uint32_t offset; | |
b39f9d20 | 49 | |
1e901a75 | 50 | /* Glyph if loaded, or NULL otherwise. */ |
51 | struct grub_font_glyph *glyph; | |
52 | }; | |
53 | ||
54 | #define FONT_WEIGHT_NORMAL 100 | |
55 | #define FONT_WEIGHT_BOLD 200 | |
26ba5c22 | 56 | #define ASCII_BITMAP_SIZE 16 |
1e901a75 | 57 | |
58 | struct grub_font | |
59 | { | |
60 | char *name; | |
61 | grub_file_t file; | |
62 | char *family; | |
63 | short point_size; | |
64 | short weight; | |
65 | short max_char_width; | |
66 | short max_char_height; | |
67 | short ascent; | |
68 | short descent; | |
69 | short leading; | |
70 | grub_uint32_t num_chars; | |
71 | struct char_index_entry *char_index; | |
f9e4ed6a | 72 | grub_uint16_t *bmp_idx; |
1e901a75 | 73 | }; |
74 | ||
75 | /* Definition of font registry. */ | |
76 | struct grub_font_node *grub_font_list; | |
77 | ||
78 | static int register_font (grub_font_t font); | |
79 | static void font_init (grub_font_t font); | |
80 | static void free_font (grub_font_t font); | |
81 | static void remove_font (grub_font_t font); | |
82 | ||
83 | struct font_file_section | |
84 | { | |
85 | /* The file this section is in. */ | |
86 | grub_file_t file; | |
b39f9d20 | 87 | |
1e901a75 | 88 | /* FOURCC name of the section. */ |
89 | char name[4]; | |
b39f9d20 | 90 | |
1e901a75 | 91 | /* Length of the section contents. */ |
92 | grub_uint32_t length; | |
b39f9d20 | 93 | |
1e901a75 | 94 | /* Set by open_section() on EOF. */ |
95 | int eof; | |
96 | }; | |
97 | ||
1e901a75 | 98 | /* Replace unknown glyphs with a rounded question mark. */ |
1118c32e | 99 | static grub_uint8_t unknown_glyph_bitmap[] = { |
1e901a75 | 100 | /* 76543210 */ |
1118c32e VS |
101 | 0x7C, /* ooooo */ |
102 | 0x82, /* o o */ | |
103 | 0xBA, /* o ooo o */ | |
104 | 0xAA, /* o o o o */ | |
105 | 0xAA, /* o o o o */ | |
106 | 0x8A, /* o o o */ | |
107 | 0x9A, /* o oo o */ | |
108 | 0x92, /* o o o */ | |
109 | 0x92, /* o o o */ | |
110 | 0x92, /* o o o */ | |
111 | 0x92, /* o o o */ | |
112 | 0x82, /* o o */ | |
113 | 0x92, /* o o o */ | |
114 | 0x82, /* o o */ | |
115 | 0x7C, /* ooooo */ | |
116 | 0x00 /* */ | |
1e901a75 | 117 | }; |
118 | ||
119 | /* The "unknown glyph" glyph, used as a last resort. */ | |
120 | static struct grub_font_glyph *unknown_glyph; | |
121 | ||
122 | /* The font structure used when no other font is loaded. This functions | |
123 | as a "Null Object" pattern, so that code everywhere does not have to | |
124 | check for a NULL grub_font_t to avoid dereferencing a null pointer. */ | |
125 | static struct grub_font null_font; | |
126 | ||
127 | /* Flag to ensure module is initialized only once. */ | |
128 | static grub_uint8_t font_loader_initialized; | |
129 | ||
d0230c21 | 130 | #ifdef USE_ASCII_FAILBACK |
26ba5c22 | 131 | static struct grub_font_glyph *ascii_font_glyph[0x80]; |
132 | #endif | |
133 | ||
134 | static struct grub_font_glyph * | |
135 | ascii_glyph_lookup (grub_uint32_t code) | |
136 | { | |
1118c32e | 137 | #ifdef USE_ASCII_FAILBACK |
26ba5c22 | 138 | static int ascii_failback_initialized = 0; |
139 | ||
140 | if (code >= 0x80) | |
53f312c1 | 141 | return NULL; |
26ba5c22 | 142 | |
143 | if (ascii_failback_initialized == 0) | |
144 | { | |
145 | int current; | |
146 | for (current = 0; current < 0x80; current++) | |
1118c32e VS |
147 | { |
148 | ascii_font_glyph[current] = | |
149 | grub_malloc (sizeof (struct grub_font_glyph) + ASCII_BITMAP_SIZE); | |
150 | ||
151 | ascii_font_glyph[current]->width = 8; | |
152 | ascii_font_glyph[current]->height = 16; | |
153 | ascii_font_glyph[current]->offset_x = 0; | |
154 | ascii_font_glyph[current]->offset_y = -2; | |
26ba5c22 | 155 | ascii_font_glyph[current]->device_width = 8; |
e6d428c1 | 156 | ascii_font_glyph[current]->font = NULL; |
26ba5c22 | 157 | |
158 | grub_memcpy (ascii_font_glyph[current]->bitmap, | |
c0420b76 | 159 | &ascii_bitmaps[current * ASCII_BITMAP_SIZE], |
26ba5c22 | 160 | ASCII_BITMAP_SIZE); |
161 | } | |
162 | ||
163 | ascii_failback_initialized = 1; | |
164 | } | |
165 | ||
166 | return ascii_font_glyph[code]; | |
167 | #else | |
168 | (void) code; | |
53f312c1 | 169 | return NULL; |
26ba5c22 | 170 | #endif |
171 | } | |
172 | ||
1e901a75 | 173 | void |
174 | grub_font_loader_init (void) | |
175 | { | |
176 | /* Only initialize font loader once. */ | |
177 | if (font_loader_initialized) | |
178 | return; | |
179 | ||
180 | /* Make glyph for unknown glyph. */ | |
1118c32e VS |
181 | unknown_glyph = grub_malloc (sizeof (struct grub_font_glyph) |
182 | + sizeof (unknown_glyph_bitmap)); | |
183 | if (!unknown_glyph) | |
1e901a75 | 184 | return; |
185 | ||
186 | unknown_glyph->width = 8; | |
187 | unknown_glyph->height = 16; | |
188 | unknown_glyph->offset_x = 0; | |
bee5fe5d | 189 | unknown_glyph->offset_y = -3; |
1e901a75 | 190 | unknown_glyph->device_width = 8; |
1118c32e VS |
191 | grub_memcpy (unknown_glyph->bitmap, |
192 | unknown_glyph_bitmap, sizeof (unknown_glyph_bitmap)); | |
1e901a75 | 193 | |
194 | /* Initialize the null font. */ | |
195 | font_init (&null_font); | |
ebcecdf1 VS |
196 | /* FIXME: Fix this slightly improper cast. */ |
197 | null_font.name = (char *) "<No Font>"; | |
1118c32e | 198 | null_font.ascent = unknown_glyph->height - 3; |
bee5fe5d | 199 | null_font.descent = 3; |
1e901a75 | 200 | null_font.max_char_width = unknown_glyph->width; |
201 | null_font.max_char_height = unknown_glyph->height; | |
202 | ||
203 | font_loader_initialized = 1; | |
204 | } | |
205 | ||
206 | /* Initialize the font object with initial default values. */ | |
207 | static void | |
208 | font_init (grub_font_t font) | |
209 | { | |
210 | font->name = 0; | |
211 | font->file = 0; | |
212 | font->family = 0; | |
213 | font->point_size = 0; | |
214 | font->weight = 0; | |
b39f9d20 | 215 | |
1e901a75 | 216 | /* Default leading value, not in font file yet. */ |
217 | font->leading = 1; | |
b39f9d20 | 218 | |
1e901a75 | 219 | font->max_char_width = 0; |
220 | font->max_char_height = 0; | |
221 | font->ascent = 0; | |
222 | font->descent = 0; | |
223 | font->num_chars = 0; | |
224 | font->char_index = 0; | |
f9e4ed6a | 225 | font->bmp_idx = 0; |
1e901a75 | 226 | } |
227 | ||
228 | /* Open the next section in the file. | |
229 | ||
230 | On success, the section name is stored in section->name and the length in | |
231 | section->length, and 0 is returned. On failure, 1 is returned and | |
4241d2b1 | 232 | grub_errno is set appropriately with an error message. |
1e901a75 | 233 | |
234 | If 1 is returned due to being at the end of the file, then section->eof is | |
235 | set to 1; otherwise, section->eof is set to 0. */ | |
236 | static int | |
237 | open_section (grub_file_t file, struct font_file_section *section) | |
238 | { | |
239 | grub_ssize_t retval; | |
240 | grub_uint32_t raw_length; | |
241 | ||
242 | section->file = file; | |
243 | section->eof = 0; | |
244 | ||
245 | /* Read the FOURCC section name. */ | |
246 | retval = grub_file_read (file, section->name, 4); | |
247 | if (retval >= 0 && retval < 4) | |
248 | { | |
249 | /* EOF encountered. */ | |
250 | section->eof = 1; | |
251 | return 1; | |
252 | } | |
253 | else if (retval < 0) | |
254 | { | |
7a45a539 | 255 | /* Read error. */ |
1e901a75 | 256 | return 1; |
257 | } | |
258 | ||
259 | /* Read the big-endian 32-bit section length. */ | |
5c5215d5 | 260 | retval = grub_file_read (file, &raw_length, 4); |
1e901a75 | 261 | if (retval >= 0 && retval < 4) |
262 | { | |
263 | /* EOF encountered. */ | |
264 | section->eof = 1; | |
265 | return 1; | |
266 | } | |
267 | else if (retval < 0) | |
268 | { | |
7a45a539 | 269 | /* Read error. */ |
1e901a75 | 270 | return 1; |
271 | } | |
272 | ||
273 | /* Convert byte-order and store in *length. */ | |
274 | section->length = grub_be_to_cpu32 (raw_length); | |
275 | ||
276 | return 0; | |
277 | } | |
278 | ||
279 | /* Size in bytes of each character index (CHIX section) | |
280 | entry in the font file. */ | |
281 | #define FONT_CHAR_INDEX_ENTRY_SIZE (4 + 1 + 4) | |
282 | ||
283 | /* Load the character index (CHIX) section contents from the font file. This | |
284 | presumes that the position of FILE is positioned immediately after the | |
285 | section length for the CHIX section (i.e., at the start of the section | |
286 | contents). Returns 0 upon success, nonzero for failure (in which case | |
287 | grub_errno is set appropriately). */ | |
288 | static int | |
289 | load_font_index (grub_file_t file, grub_uint32_t sect_length, struct | |
1118c32e | 290 | grub_font *font) |
1e901a75 | 291 | { |
292 | unsigned i; | |
c8048e32 | 293 | grub_uint32_t last_code; |
1e901a75 | 294 | |
295 | #if FONT_DEBUG >= 2 | |
1118c32e | 296 | grub_printf ("load_font_index(sect_length=%d)\n", sect_length); |
1e901a75 | 297 | #endif |
298 | ||
299 | /* Sanity check: ensure section length is divisible by the entry size. */ | |
300 | if ((sect_length % FONT_CHAR_INDEX_ENTRY_SIZE) != 0) | |
301 | { | |
302 | grub_error (GRUB_ERR_BAD_FONT, | |
1118c32e VS |
303 | "font file format error: character index length %d " |
304 | "is not a multiple of the entry size %d", | |
305 | sect_length, FONT_CHAR_INDEX_ENTRY_SIZE); | |
1e901a75 | 306 | return 1; |
307 | } | |
308 | ||
309 | /* Calculate the number of characters. */ | |
310 | font->num_chars = sect_length / FONT_CHAR_INDEX_ENTRY_SIZE; | |
311 | ||
312 | /* Allocate the character index array. */ | |
313 | font->char_index = grub_malloc (font->num_chars | |
1118c32e VS |
314 | * sizeof (struct char_index_entry)); |
315 | if (!font->char_index) | |
1e901a75 | 316 | return 1; |
f9e4ed6a | 317 | font->bmp_idx = grub_malloc (0x10000 * sizeof (grub_uint16_t)); |
1118c32e | 318 | if (!font->bmp_idx) |
25a45338 | 319 | return 1; |
f9e4ed6a VS |
320 | grub_memset (font->bmp_idx, 0xff, 0x10000 * sizeof (grub_uint16_t)); |
321 | ||
1e901a75 | 322 | |
323 | #if FONT_DEBUG >= 2 | |
1118c32e | 324 | grub_printf ("num_chars=%d)\n", font->num_chars); |
1e901a75 | 325 | #endif |
326 | ||
c8048e32 | 327 | last_code = 0; |
328 | ||
1e901a75 | 329 | /* Load the character index data from the file. */ |
330 | for (i = 0; i < font->num_chars; i++) | |
331 | { | |
332 | struct char_index_entry *entry = &font->char_index[i]; | |
333 | ||
334 | /* Read code point value; convert to native byte order. */ | |
5c5215d5 | 335 | if (grub_file_read (file, &entry->code, 4) != 4) |
1118c32e | 336 | return 1; |
1e901a75 | 337 | entry->code = grub_be_to_cpu32 (entry->code); |
338 | ||
c8048e32 | 339 | /* Verify that characters are in ascending order. */ |
340 | if (i != 0 && entry->code <= last_code) | |
1118c32e VS |
341 | { |
342 | grub_error (GRUB_ERR_BAD_FONT, | |
343 | "font characters not in ascending order: %u <= %u", | |
344 | entry->code, last_code); | |
345 | return 1; | |
346 | } | |
c8048e32 | 347 | |
f9e4ed6a VS |
348 | if (entry->code < 0x10000) |
349 | font->bmp_idx[entry->code] = i; | |
350 | ||
c8048e32 | 351 | last_code = entry->code; |
352 | ||
1e901a75 | 353 | /* Read storage flags byte. */ |
5c5215d5 | 354 | if (grub_file_read (file, &entry->storage_flags, 1) != 1) |
1118c32e | 355 | return 1; |
1e901a75 | 356 | |
357 | /* Read glyph data offset; convert to native byte order. */ | |
5c5215d5 | 358 | if (grub_file_read (file, &entry->offset, 4) != 4) |
1118c32e | 359 | return 1; |
1e901a75 | 360 | entry->offset = grub_be_to_cpu32 (entry->offset); |
361 | ||
362 | /* No glyph loaded. Will be loaded on demand and cached thereafter. */ | |
363 | entry->glyph = 0; | |
364 | ||
365 | #if FONT_DEBUG >= 5 | |
366 | /* Print the 1st 10 characters. */ | |
367 | if (i < 10) | |
1118c32e | 368 | grub_printf ("c=%d o=%d\n", entry->code, entry->offset); |
1e901a75 | 369 | #endif |
370 | } | |
371 | ||
372 | return 0; | |
373 | } | |
374 | ||
375 | /* Read the contents of the specified section as a string, which is | |
376 | allocated on the heap. Returns 0 if there is an error. */ | |
377 | static char * | |
378 | read_section_as_string (struct font_file_section *section) | |
379 | { | |
380 | char *str; | |
381 | grub_ssize_t ret; | |
382 | ||
383 | str = grub_malloc (section->length + 1); | |
1118c32e | 384 | if (!str) |
1e901a75 | 385 | return 0; |
386 | ||
387 | ret = grub_file_read (section->file, str, section->length); | |
388 | if (ret < 0 || ret != (grub_ssize_t) section->length) | |
389 | { | |
390 | grub_free (str); | |
391 | return 0; | |
392 | } | |
393 | ||
394 | str[section->length] = '\0'; | |
395 | return str; | |
396 | } | |
397 | ||
398 | /* Read the contents of the current section as a 16-bit integer value, | |
399 | which is stored into *VALUE. | |
400 | Returns 0 upon success, nonzero upon failure. */ | |
401 | static int | |
1118c32e VS |
402 | read_section_as_short (struct font_file_section *section, |
403 | grub_int16_t * value) | |
1e901a75 | 404 | { |
405 | grub_uint16_t raw_value; | |
406 | ||
407 | if (section->length != 2) | |
408 | { | |
409 | grub_error (GRUB_ERR_BAD_FONT, | |
1118c32e VS |
410 | "font file format error: section %c%c%c%c length " |
411 | "is %d but should be 2", | |
412 | section->name[0], section->name[1], | |
413 | section->name[2], section->name[3], section->length); | |
1e901a75 | 414 | return 1; |
415 | } | |
5c5215d5 | 416 | if (grub_file_read (section->file, &raw_value, 2) != 2) |
1e901a75 | 417 | return 1; |
418 | ||
419 | *value = grub_be_to_cpu16 (raw_value); | |
420 | return 0; | |
421 | } | |
422 | ||
423 | /* Load a font and add it to the beginning of the global font list. | |
424 | Returns 0 upon success, nonzero upon failure. */ | |
a79b8a15 | 425 | grub_font_t |
1e901a75 | 426 | grub_font_load (const char *filename) |
427 | { | |
428 | grub_file_t file = 0; | |
429 | struct font_file_section section; | |
430 | char magic[4]; | |
431 | grub_font_t font = 0; | |
432 | ||
433 | #if FONT_DEBUG >= 1 | |
1118c32e | 434 | grub_printf ("add_font(%s)\n", filename); |
1e901a75 | 435 | #endif |
436 | ||
274416e8 VS |
437 | if (filename[0] == '(' || filename[0] == '/' || filename[0] == '+') |
438 | file = grub_buffile_open (filename, 1024); | |
439 | else | |
440 | { | |
441 | const char *prefix = grub_env_get ("prefix"); | |
442 | char *fullname, *ptr; | |
443 | if (!prefix) | |
444 | { | |
445 | grub_error (GRUB_ERR_FILE_NOT_FOUND, N_("variable `%s' isn't set"), | |
446 | "prefix"); | |
447 | goto fail; | |
448 | } | |
449 | fullname = grub_malloc (grub_strlen (prefix) + grub_strlen (filename) + 1 | |
450 | + sizeof ("/fonts/") + sizeof (".pf2")); | |
451 | if (!fullname) | |
452 | goto fail; | |
453 | ptr = grub_stpcpy (fullname, prefix); | |
454 | ptr = grub_stpcpy (ptr, "/fonts/"); | |
455 | ptr = grub_stpcpy (ptr, filename); | |
456 | ptr = grub_stpcpy (ptr, ".pf2"); | |
457 | *ptr = 0; | |
458 | file = grub_buffile_open (fullname, 1024); | |
459 | grub_free (fullname); | |
460 | } | |
1e901a75 | 461 | if (!file) |
462 | goto fail; | |
463 | ||
464 | #if FONT_DEBUG >= 3 | |
1118c32e | 465 | grub_printf ("file opened\n"); |
1e901a75 | 466 | #endif |
467 | ||
468 | /* Read the FILE section. It indicates the file format. */ | |
469 | if (open_section (file, §ion) != 0) | |
470 | goto fail; | |
471 | ||
472 | #if FONT_DEBUG >= 3 | |
1118c32e | 473 | grub_printf ("opened FILE section\n"); |
1e901a75 | 474 | #endif |
de0b7a4e | 475 | if (grub_memcmp (section.name, FONT_FORMAT_SECTION_NAMES_FILE, |
1118c32e | 476 | sizeof (FONT_FORMAT_SECTION_NAMES_FILE) - 1) != 0) |
1e901a75 | 477 | { |
478 | grub_error (GRUB_ERR_BAD_FONT, | |
1118c32e | 479 | "font file format error: 1st section must be FILE"); |
1e901a75 | 480 | goto fail; |
481 | } | |
482 | ||
483 | #if FONT_DEBUG >= 3 | |
1118c32e | 484 | grub_printf ("section name ok\n"); |
1e901a75 | 485 | #endif |
486 | if (section.length != 4) | |
487 | { | |
488 | grub_error (GRUB_ERR_BAD_FONT, | |
1118c32e VS |
489 | "font file format error (file type ID length is %d " |
490 | "but should be 4)", section.length); | |
1e901a75 | 491 | goto fail; |
492 | } | |
493 | ||
494 | #if FONT_DEBUG >= 3 | |
1118c32e | 495 | grub_printf ("section length ok\n"); |
1e901a75 | 496 | #endif |
497 | /* Check the file format type code. */ | |
498 | if (grub_file_read (file, magic, 4) != 4) | |
499 | goto fail; | |
500 | ||
501 | #if FONT_DEBUG >= 3 | |
1118c32e | 502 | grub_printf ("read magic ok\n"); |
1e901a75 | 503 | #endif |
504 | ||
de0b7a4e | 505 | if (grub_memcmp (magic, FONT_FORMAT_PFF2_MAGIC, 4) != 0) |
1e901a75 | 506 | { |
7fd0baee | 507 | grub_error (GRUB_ERR_BAD_FONT, "invalid font magic %x %x %x %x", |
1118c32e | 508 | magic[0], magic[1], magic[2], magic[3]); |
1e901a75 | 509 | goto fail; |
510 | } | |
511 | ||
512 | #if FONT_DEBUG >= 3 | |
1118c32e | 513 | grub_printf ("compare magic ok\n"); |
1e901a75 | 514 | #endif |
515 | ||
516 | /* Allocate the font object. */ | |
25a45338 | 517 | font = (grub_font_t) grub_zalloc (sizeof (struct grub_font)); |
1118c32e | 518 | if (!font) |
1e901a75 | 519 | goto fail; |
520 | ||
521 | font_init (font); | |
522 | font->file = file; | |
523 | ||
524 | #if FONT_DEBUG >= 3 | |
1118c32e | 525 | grub_printf ("allocate font ok; loading font info\n"); |
1e901a75 | 526 | #endif |
527 | ||
528 | /* Load the font information. */ | |
529 | while (1) | |
530 | { | |
531 | if (open_section (file, §ion) != 0) | |
1118c32e VS |
532 | { |
533 | if (section.eof) | |
534 | break; /* Done reading the font file. */ | |
535 | else | |
536 | goto fail; | |
537 | } | |
1e901a75 | 538 | |
539 | #if FONT_DEBUG >= 2 | |
1118c32e VS |
540 | grub_printf ("opened section %c%c%c%c ok\n", |
541 | section.name[0], section.name[1], | |
542 | section.name[2], section.name[3]); | |
1e901a75 | 543 | #endif |
544 | ||
de0b7a4e | 545 | if (grub_memcmp (section.name, FONT_FORMAT_SECTION_NAMES_FONT_NAME, |
1118c32e VS |
546 | sizeof (FONT_FORMAT_SECTION_NAMES_FONT_NAME) - 1) == 0) |
547 | { | |
548 | font->name = read_section_as_string (§ion); | |
549 | if (!font->name) | |
550 | goto fail; | |
551 | } | |
de0b7a4e | 552 | else if (grub_memcmp (section.name, |
1118c32e VS |
553 | FONT_FORMAT_SECTION_NAMES_POINT_SIZE, |
554 | sizeof (FONT_FORMAT_SECTION_NAMES_POINT_SIZE) - | |
555 | 1) == 0) | |
556 | { | |
557 | if (read_section_as_short (§ion, &font->point_size) != 0) | |
558 | goto fail; | |
559 | } | |
de0b7a4e | 560 | else if (grub_memcmp (section.name, FONT_FORMAT_SECTION_NAMES_WEIGHT, |
1118c32e VS |
561 | sizeof (FONT_FORMAT_SECTION_NAMES_WEIGHT) - 1) |
562 | == 0) | |
563 | { | |
564 | char *wt; | |
565 | wt = read_section_as_string (§ion); | |
566 | if (!wt) | |
567 | continue; | |
568 | /* Convert the weight string 'normal' or 'bold' into a number. */ | |
569 | if (grub_strcmp (wt, "normal") == 0) | |
570 | font->weight = FONT_WEIGHT_NORMAL; | |
571 | else if (grub_strcmp (wt, "bold") == 0) | |
572 | font->weight = FONT_WEIGHT_BOLD; | |
573 | grub_free (wt); | |
574 | } | |
de0b7a4e | 575 | else if (grub_memcmp (section.name, |
1118c32e VS |
576 | FONT_FORMAT_SECTION_NAMES_MAX_CHAR_WIDTH, |
577 | sizeof (FONT_FORMAT_SECTION_NAMES_MAX_CHAR_WIDTH) | |
578 | - 1) == 0) | |
579 | { | |
580 | if (read_section_as_short (§ion, &font->max_char_width) != 0) | |
581 | goto fail; | |
582 | } | |
de0b7a4e | 583 | else if (grub_memcmp (section.name, |
1118c32e VS |
584 | FONT_FORMAT_SECTION_NAMES_MAX_CHAR_HEIGHT, |
585 | sizeof (FONT_FORMAT_SECTION_NAMES_MAX_CHAR_HEIGHT) | |
586 | - 1) == 0) | |
587 | { | |
588 | if (read_section_as_short (§ion, &font->max_char_height) != 0) | |
589 | goto fail; | |
590 | } | |
de0b7a4e | 591 | else if (grub_memcmp (section.name, |
1118c32e VS |
592 | FONT_FORMAT_SECTION_NAMES_ASCENT, |
593 | sizeof (FONT_FORMAT_SECTION_NAMES_ASCENT) - 1) | |
594 | == 0) | |
595 | { | |
596 | if (read_section_as_short (§ion, &font->ascent) != 0) | |
597 | goto fail; | |
598 | } | |
de0b7a4e | 599 | else if (grub_memcmp (section.name, FONT_FORMAT_SECTION_NAMES_DESCENT, |
1118c32e VS |
600 | sizeof (FONT_FORMAT_SECTION_NAMES_DESCENT) - 1) |
601 | == 0) | |
602 | { | |
603 | if (read_section_as_short (§ion, &font->descent) != 0) | |
604 | goto fail; | |
605 | } | |
de0b7a4e | 606 | else if (grub_memcmp (section.name, |
1118c32e VS |
607 | FONT_FORMAT_SECTION_NAMES_CHAR_INDEX, |
608 | sizeof (FONT_FORMAT_SECTION_NAMES_CHAR_INDEX) - | |
609 | 1) == 0) | |
610 | { | |
611 | if (load_font_index (file, section.length, font) != 0) | |
612 | goto fail; | |
613 | } | |
de0b7a4e | 614 | else if (grub_memcmp (section.name, FONT_FORMAT_SECTION_NAMES_DATA, |
1118c32e VS |
615 | sizeof (FONT_FORMAT_SECTION_NAMES_DATA) - 1) == 0) |
616 | { | |
617 | /* When the DATA section marker is reached, we stop reading. */ | |
618 | break; | |
619 | } | |
1e901a75 | 620 | else |
1118c32e VS |
621 | { |
622 | /* Unhandled section type, simply skip past it. */ | |
1e901a75 | 623 | #if FONT_DEBUG >= 3 |
1118c32e | 624 | grub_printf ("Unhandled section type, skipping.\n"); |
1e901a75 | 625 | #endif |
1118c32e VS |
626 | grub_off_t section_end = grub_file_tell (file) + section.length; |
627 | if ((int) grub_file_seek (file, section_end) == -1) | |
628 | goto fail; | |
629 | } | |
1e901a75 | 630 | } |
631 | ||
1118c32e | 632 | if (!font->name) |
1e901a75 | 633 | { |
df067ad1 | 634 | grub_dprintf ("font", "Font has no name.\n"); |
1e901a75 | 635 | font->name = grub_strdup ("Unknown"); |
636 | } | |
637 | ||
638 | #if FONT_DEBUG >= 1 | |
639 | grub_printf ("Loaded font `%s'.\n" | |
1118c32e VS |
640 | "Ascent=%d Descent=%d MaxW=%d MaxH=%d Number of characters=%d.\n", |
641 | font->name, | |
642 | font->ascent, font->descent, | |
643 | font->max_char_width, font->max_char_height, font->num_chars); | |
1e901a75 | 644 | #endif |
645 | ||
646 | if (font->max_char_width == 0 | |
647 | || font->max_char_height == 0 | |
648 | || font->num_chars == 0 | |
1118c32e | 649 | || font->char_index == 0 || font->ascent == 0 || font->descent == 0) |
1e901a75 | 650 | { |
651 | grub_error (GRUB_ERR_BAD_FONT, | |
1118c32e | 652 | "invalid font file: missing some required data"); |
1e901a75 | 653 | goto fail; |
654 | } | |
655 | ||
656 | /* Add the font to the global font registry. */ | |
657 | if (register_font (font) != 0) | |
658 | goto fail; | |
659 | ||
a79b8a15 | 660 | return font; |
1e901a75 | 661 | |
662 | fail: | |
25a45338 VS |
663 | if (file) |
664 | grub_file_close (file); | |
665 | if (font) | |
666 | font->file = 0; | |
667 | ||
1e901a75 | 668 | free_font (font); |
a79b8a15 | 669 | return 0; |
1e901a75 | 670 | } |
671 | ||
672 | /* Read a 16-bit big-endian integer from FILE, convert it to native byte | |
673 | order, and store it in *VALUE. | |
674 | Returns 0 on success, 1 on failure. */ | |
675 | static int | |
676 | read_be_uint16 (grub_file_t file, grub_uint16_t * value) | |
677 | { | |
5c5215d5 | 678 | if (grub_file_read (file, value, 2) != 2) |
1e901a75 | 679 | return 1; |
680 | *value = grub_be_to_cpu16 (*value); | |
681 | return 0; | |
682 | } | |
683 | ||
684 | static int | |
685 | read_be_int16 (grub_file_t file, grub_int16_t * value) | |
686 | { | |
687 | /* For the signed integer version, use the same code as for unsigned. */ | |
688 | return read_be_uint16 (file, (grub_uint16_t *) value); | |
689 | } | |
690 | ||
691 | /* Return a pointer to the character index entry for the glyph corresponding to | |
692 | the codepoint CODE in the font FONT. If not found, return zero. */ | |
f9e4ed6a | 693 | static inline struct char_index_entry * |
1e901a75 | 694 | find_glyph (const grub_font_t font, grub_uint32_t code) |
695 | { | |
c8048e32 | 696 | struct char_index_entry *table; |
697 | grub_size_t lo; | |
698 | grub_size_t hi; | |
699 | grub_size_t mid; | |
700 | ||
c8048e32 | 701 | table = font->char_index; |
f9e4ed6a VS |
702 | |
703 | /* Use BMP index if possible. */ | |
61e89d9d | 704 | if (code < 0x10000 && font->bmp_idx) |
f9e4ed6a VS |
705 | { |
706 | if (font->bmp_idx[code] == 0xffff) | |
707 | return 0; | |
708 | return &table[font->bmp_idx[code]]; | |
709 | } | |
710 | ||
711 | /* Do a binary search in `char_index', which is ordered by code point. */ | |
c8048e32 | 712 | lo = 0; |
713 | hi = font->num_chars - 1; | |
1e901a75 | 714 | |
1118c32e | 715 | if (!table) |
57a55913 | 716 | return 0; |
717 | ||
c8048e32 | 718 | while (lo <= hi) |
1e901a75 | 719 | { |
c8048e32 | 720 | mid = lo + (hi - lo) / 2; |
721 | if (code < table[mid].code) | |
1118c32e | 722 | hi = mid - 1; |
c8048e32 | 723 | else if (code > table[mid].code) |
1118c32e | 724 | lo = mid + 1; |
c8048e32 | 725 | else |
1118c32e | 726 | return &table[mid]; |
1e901a75 | 727 | } |
728 | ||
729 | return 0; | |
730 | } | |
731 | ||
732 | /* Get a glyph for the Unicode character CODE in FONT. The glyph is loaded | |
733 | from the font file if has not been loaded yet. | |
734 | Returns a pointer to the glyph if found, or 0 if it is not found. */ | |
735 | static struct grub_font_glyph * | |
736 | grub_font_get_glyph_internal (grub_font_t font, grub_uint32_t code) | |
737 | { | |
738 | struct char_index_entry *index_entry; | |
739 | ||
740 | index_entry = find_glyph (font, code); | |
741 | if (index_entry) | |
742 | { | |
743 | struct grub_font_glyph *glyph = 0; | |
744 | grub_uint16_t width; | |
745 | grub_uint16_t height; | |
746 | grub_int16_t xoff; | |
747 | grub_int16_t yoff; | |
748 | grub_int16_t dwidth; | |
749 | int len; | |
750 | ||
751 | if (index_entry->glyph) | |
1118c32e VS |
752 | /* Return cached glyph. */ |
753 | return index_entry->glyph; | |
1e901a75 | 754 | |
1118c32e VS |
755 | if (!font->file) |
756 | /* No open file, can't load any glyphs. */ | |
757 | return 0; | |
1e901a75 | 758 | |
759 | /* Make sure we can find glyphs for error messages. Push active | |
760 | error message to error stack and reset error message. */ | |
761 | grub_error_push (); | |
762 | ||
763 | grub_file_seek (font->file, index_entry->offset); | |
764 | ||
765 | /* Read the glyph width, height, and baseline. */ | |
1118c32e VS |
766 | if (read_be_uint16 (font->file, &width) != 0 |
767 | || read_be_uint16 (font->file, &height) != 0 | |
768 | || read_be_int16 (font->file, &xoff) != 0 | |
769 | || read_be_int16 (font->file, &yoff) != 0 | |
770 | || read_be_int16 (font->file, &dwidth) != 0) | |
771 | { | |
772 | remove_font (font); | |
773 | return 0; | |
774 | } | |
1e901a75 | 775 | |
776 | len = (width * height + 7) / 8; | |
777 | glyph = grub_malloc (sizeof (struct grub_font_glyph) + len); | |
1118c32e VS |
778 | if (!glyph) |
779 | { | |
780 | remove_font (font); | |
781 | return 0; | |
782 | } | |
1e901a75 | 783 | |
784 | glyph->font = font; | |
785 | glyph->width = width; | |
786 | glyph->height = height; | |
787 | glyph->offset_x = xoff; | |
788 | glyph->offset_y = yoff; | |
789 | glyph->device_width = dwidth; | |
790 | ||
791 | /* Don't try to read empty bitmaps (e.g., space characters). */ | |
792 | if (len != 0) | |
1118c32e VS |
793 | { |
794 | if (grub_file_read (font->file, glyph->bitmap, len) != len) | |
795 | { | |
796 | remove_font (font); | |
797 | return 0; | |
798 | } | |
799 | } | |
1e901a75 | 800 | |
801 | /* Restore old error message. */ | |
802 | grub_error_pop (); | |
803 | ||
804 | /* Cache the glyph. */ | |
805 | index_entry->glyph = glyph; | |
806 | ||
807 | return glyph; | |
808 | } | |
809 | ||
810 | return 0; | |
811 | } | |
812 | ||
813 | /* Free the memory used by FONT. | |
814 | This should not be called if the font has been made available to | |
815 | users (once it is added to the global font list), since there would | |
816 | be the possibility of a dangling pointer. */ | |
817 | static void | |
818 | free_font (grub_font_t font) | |
819 | { | |
820 | if (font) | |
821 | { | |
822 | if (font->file) | |
1118c32e | 823 | grub_file_close (font->file); |
1e901a75 | 824 | grub_free (font->name); |
825 | grub_free (font->family); | |
826 | grub_free (font->char_index); | |
25a45338 | 827 | grub_free (font->bmp_idx); |
1e901a75 | 828 | grub_free (font); |
829 | } | |
830 | } | |
831 | ||
832 | /* Add FONT to the global font registry. | |
833 | Returns 0 upon success, nonzero on failure | |
834 | (the font was not registered). */ | |
835 | static int | |
836 | register_font (grub_font_t font) | |
837 | { | |
838 | struct grub_font_node *node = 0; | |
839 | ||
840 | node = grub_malloc (sizeof (struct grub_font_node)); | |
1118c32e | 841 | if (!node) |
1e901a75 | 842 | return 1; |
843 | ||
844 | node->value = font; | |
845 | node->next = grub_font_list; | |
846 | grub_font_list = node; | |
847 | ||
848 | return 0; | |
849 | } | |
850 | ||
851 | /* Remove the font from the global font list. We don't actually free the | |
852 | font's memory since users could be holding references to the font. */ | |
853 | static void | |
854 | remove_font (grub_font_t font) | |
855 | { | |
856 | struct grub_font_node **nextp, *cur; | |
857 | ||
858 | for (nextp = &grub_font_list, cur = *nextp; | |
1118c32e | 859 | cur; nextp = &cur->next, cur = cur->next) |
1e901a75 | 860 | { |
861 | if (cur->value == font) | |
1118c32e VS |
862 | { |
863 | *nextp = cur->next; | |
1e901a75 | 864 | |
1118c32e VS |
865 | /* Free the node, but not the font itself. */ |
866 | grub_free (cur); | |
1e901a75 | 867 | |
1118c32e VS |
868 | return; |
869 | } | |
1e901a75 | 870 | } |
871 | } | |
872 | ||
873 | /* Get a font from the list of loaded fonts. This function will return | |
874 | another font if the requested font is not available. If no fonts are | |
875 | loaded, then a special 'null font' is returned, which contains no glyphs, | |
876 | but is not a null pointer so the caller may omit checks for NULL. */ | |
877 | grub_font_t | |
878 | grub_font_get (const char *font_name) | |
879 | { | |
880 | struct grub_font_node *node; | |
881 | ||
882 | for (node = grub_font_list; node; node = node->next) | |
883 | { | |
884 | grub_font_t font = node->value; | |
885 | if (grub_strcmp (font->name, font_name) == 0) | |
1118c32e | 886 | return font; |
1e901a75 | 887 | } |
888 | ||
889 | /* If no font by that name is found, return the first font in the list | |
890 | as a fallback. */ | |
891 | if (grub_font_list && grub_font_list->value) | |
892 | return grub_font_list->value; | |
893 | else | |
894 | /* The null_font is a last resort. */ | |
895 | return &null_font; | |
896 | } | |
897 | ||
d9f31a41 | 898 | /* Get the full name of the font. */ |
1e901a75 | 899 | const char * |
900 | grub_font_get_name (grub_font_t font) | |
901 | { | |
902 | return font->name; | |
903 | } | |
904 | ||
905 | /* Get the maximum width of any character in the font in pixels. */ | |
906 | int | |
907 | grub_font_get_max_char_width (grub_font_t font) | |
908 | { | |
909 | return font->max_char_width; | |
910 | } | |
911 | ||
912 | /* Get the maximum height of any character in the font in pixels. */ | |
913 | int | |
914 | grub_font_get_max_char_height (grub_font_t font) | |
915 | { | |
916 | return font->max_char_height; | |
917 | } | |
918 | ||
919 | /* Get the distance in pixels from the top of characters to the baseline. */ | |
920 | int | |
921 | grub_font_get_ascent (grub_font_t font) | |
922 | { | |
923 | return font->ascent; | |
924 | } | |
925 | ||
926 | /* Get the distance in pixels from the baseline to the lowest descenders | |
927 | (for instance, in a lowercase 'y', 'g', etc.). */ | |
928 | int | |
929 | grub_font_get_descent (grub_font_t font) | |
930 | { | |
931 | return font->descent; | |
932 | } | |
933 | ||
97ea65d4 VS |
934 | /* FIXME: not correct for all fonts. */ |
935 | int | |
936 | grub_font_get_xheight (grub_font_t font) | |
937 | { | |
938 | return font->ascent / 2; | |
939 | } | |
940 | ||
1e901a75 | 941 | /* Get the *standard leading* of the font in pixel, which is the spacing |
942 | between two lines of text. Specifically, it is the space between the | |
943 | descent of one line and the ascent of the next line. This is included | |
944 | in the *height* metric. */ | |
945 | int | |
946 | grub_font_get_leading (grub_font_t font) | |
947 | { | |
948 | return font->leading; | |
949 | } | |
950 | ||
951 | /* Get the distance in pixels between baselines of adjacent lines of text. */ | |
952 | int | |
953 | grub_font_get_height (grub_font_t font) | |
954 | { | |
955 | return font->ascent + font->descent + font->leading; | |
956 | } | |
957 | ||
1e901a75 | 958 | /* Get the glyph for FONT corresponding to the Unicode code point CODE. |
26ba5c22 | 959 | Returns the ASCII glyph for the code if no other fonts are available. |
960 | The glyphs are cached once loaded. */ | |
1e901a75 | 961 | struct grub_font_glyph * |
962 | grub_font_get_glyph (grub_font_t font, grub_uint32_t code) | |
963 | { | |
61e89d9d VS |
964 | struct grub_font_glyph *glyph = 0; |
965 | if (font) | |
966 | glyph = grub_font_get_glyph_internal (font, code); | |
1e901a75 | 967 | if (glyph == 0) |
26ba5c22 | 968 | { |
969 | glyph = ascii_glyph_lookup (code); | |
970 | } | |
1e901a75 | 971 | return glyph; |
972 | } | |
973 | ||
974 | ||
975 | /* Calculate a subject value representing "how similar" two fonts are. | |
976 | This is used to prioritize the order that fonts are scanned for missing | |
977 | glyphs. The object is to select glyphs from the most similar font | |
978 | possible, for the best appearance. | |
979 | The heuristic is crude, but it helps greatly when fonts of similar | |
980 | sizes are used so that tiny 8 point glyphs are not mixed into a string | |
981 | of 24 point text unless there is no other choice. */ | |
982 | static int | |
1118c32e | 983 | get_font_diversity (grub_font_t a, grub_font_t b) |
1e901a75 | 984 | { |
985 | int d; | |
986 | ||
987 | d = 0; | |
988 | ||
989 | if (a->ascent && b->ascent) | |
990 | d += grub_abs (a->ascent - b->ascent) * 8; | |
991 | else | |
992 | /* Penalty for missing attributes. */ | |
993 | d += 50; | |
994 | ||
995 | if (a->max_char_height && b->max_char_height) | |
996 | d += grub_abs (a->max_char_height - b->max_char_height) * 8; | |
997 | else | |
998 | /* Penalty for missing attributes. */ | |
999 | d += 50; | |
b39f9d20 | 1000 | |
1e901a75 | 1001 | /* Weight is a minor factor. */ |
1002 | d += (a->weight != b->weight) ? 5 : 0; | |
1003 | ||
1004 | return d; | |
1005 | } | |
1006 | ||
1007 | /* Get a glyph corresponding to the codepoint CODE. If FONT contains the | |
1008 | specified glyph, then it is returned. Otherwise, all other loaded fonts | |
1009 | are searched until one is found that contains a glyph for CODE. | |
1010 | If no glyph is available for CODE in the loaded fonts, then a glyph | |
1011 | representing an unknown character is returned. | |
1012 | This function never returns NULL. | |
1013 | The returned glyph is owned by the font manager and should not be freed | |
1014 | by the caller. The glyphs are cached. */ | |
1015 | struct grub_font_glyph * | |
1016 | grub_font_get_glyph_with_fallback (grub_font_t font, grub_uint32_t code) | |
1017 | { | |
1018 | struct grub_font_glyph *glyph; | |
1019 | struct grub_font_node *node; | |
1020 | /* Keep track of next node, in case there's an I/O error in | |
1021 | grub_font_get_glyph_internal() and the font is removed from the list. */ | |
1022 | struct grub_font_node *next; | |
1023 | /* Information on the best glyph found so far, to help find the glyph in | |
1024 | the best matching to the requested one. */ | |
1025 | int best_diversity; | |
1026 | struct grub_font_glyph *best_glyph; | |
1027 | ||
1028 | if (font) | |
1029 | { | |
1030 | /* First try to get the glyph from the specified font. */ | |
1031 | glyph = grub_font_get_glyph_internal (font, code); | |
1032 | if (glyph) | |
1118c32e | 1033 | return glyph; |
1e901a75 | 1034 | } |
1035 | ||
1036 | /* Otherwise, search all loaded fonts for the glyph and use the one from | |
1037 | the font that best matches the requested font. */ | |
1038 | best_diversity = 10000; | |
1039 | best_glyph = 0; | |
1040 | ||
1041 | for (node = grub_font_list; node; node = next) | |
1042 | { | |
1043 | grub_font_t curfont; | |
1044 | ||
1045 | curfont = node->value; | |
1046 | next = node->next; | |
1047 | ||
1048 | glyph = grub_font_get_glyph_internal (curfont, code); | |
942a10c7 VS |
1049 | if (glyph && !font) |
1050 | return glyph; | |
1e901a75 | 1051 | if (glyph) |
1118c32e VS |
1052 | { |
1053 | int d; | |
1054 | ||
1055 | d = get_font_diversity (curfont, font); | |
1056 | if (d < best_diversity) | |
1057 | { | |
1058 | best_diversity = d; | |
1059 | best_glyph = glyph; | |
1060 | } | |
1061 | } | |
1e901a75 | 1062 | } |
1063 | ||
72f12cdc | 1064 | return best_glyph; |
1e901a75 | 1065 | } |
1066 | ||
72f12cdc VS |
1067 | static struct grub_font_glyph * |
1068 | grub_font_dup_glyph (struct grub_font_glyph *glyph) | |
1069 | { | |
1070 | static struct grub_font_glyph *ret; | |
1071 | ret = grub_malloc (sizeof (*ret) + (glyph->width * glyph->height + 7) / 8); | |
1072 | if (!ret) | |
1073 | return NULL; | |
1074 | grub_memcpy (ret, glyph, sizeof (*ret) | |
1075 | + (glyph->width * glyph->height + 7) / 8); | |
1076 | return ret; | |
1077 | } | |
1078 | ||
1079 | /* FIXME: suboptimal. */ | |
1080 | static void | |
1081 | grub_font_blit_glyph (struct grub_font_glyph *target, | |
a87add6d | 1082 | struct grub_font_glyph *src, unsigned dx, unsigned dy) |
72f12cdc VS |
1083 | { |
1084 | unsigned src_bit, tgt_bit, src_byte, tgt_byte; | |
1085 | unsigned i, j; | |
1086 | for (i = 0; i < src->height; i++) | |
1087 | { | |
1088 | src_bit = (src->width * i) % 8; | |
1089 | src_byte = (src->width * i) / 8; | |
1090 | tgt_bit = (target->width * (dy + i) + dx) % 8; | |
1091 | tgt_byte = (target->width * (dy + i) + dx) / 8; | |
1092 | for (j = 0; j < src->width; j++) | |
1093 | { | |
1094 | target->bitmap[tgt_byte] |= ((src->bitmap[src_byte] << src_bit) | |
1095 | & 0x80) >> tgt_bit; | |
1096 | src_bit++; | |
1097 | tgt_bit++; | |
1098 | if (src_bit == 8) | |
1099 | { | |
1100 | src_byte++; | |
1101 | src_bit = 0; | |
1102 | } | |
1103 | if (tgt_bit == 8) | |
1104 | { | |
1105 | tgt_byte++; | |
1106 | tgt_bit = 0; | |
1107 | } | |
1108 | } | |
1109 | } | |
1110 | } | |
1111 | ||
97ea65d4 VS |
1112 | static void |
1113 | grub_font_blit_glyph_mirror (struct grub_font_glyph *target, | |
1114 | struct grub_font_glyph *src, | |
1115 | unsigned dx, unsigned dy) | |
1116 | { | |
1117 | unsigned tgt_bit, src_byte, tgt_byte; | |
1118 | signed src_bit; | |
1119 | unsigned i, j; | |
1120 | for (i = 0; i < src->height; i++) | |
1121 | { | |
1122 | src_bit = (src->width * i + src->width - 1) % 8; | |
1123 | src_byte = (src->width * i + src->width - 1) / 8; | |
1124 | tgt_bit = (target->width * (dy + i) + dx) % 8; | |
1125 | tgt_byte = (target->width * (dy + i) + dx) / 8; | |
1126 | for (j = 0; j < src->width; j++) | |
1127 | { | |
1128 | target->bitmap[tgt_byte] |= ((src->bitmap[src_byte] << src_bit) | |
1129 | & 0x80) >> tgt_bit; | |
1130 | src_bit--; | |
1131 | tgt_bit++; | |
1132 | if (src_bit == -1) | |
1133 | { | |
1134 | src_byte--; | |
1135 | src_bit = 7; | |
1136 | } | |
1137 | if (tgt_bit == 8) | |
1138 | { | |
1139 | tgt_byte++; | |
1140 | tgt_bit = 0; | |
1141 | } | |
1142 | } | |
1143 | } | |
1144 | } | |
1145 | ||
d44892fe CW |
1146 | /* Context for blit_comb. */ |
1147 | struct blit_comb_ctx | |
1148 | { | |
1149 | struct grub_font_glyph *glyph; | |
1150 | int *device_width; | |
1151 | struct grub_video_signed_rect bounds; | |
1152 | }; | |
1153 | ||
1154 | /* Helper for blit_comb. */ | |
1155 | static void | |
1156 | do_blit (struct grub_font_glyph *src, signed dx, signed dy, | |
1157 | struct blit_comb_ctx *ctx) | |
1158 | { | |
1159 | if (ctx->glyph) | |
1160 | grub_font_blit_glyph (ctx->glyph, src, dx - ctx->glyph->offset_x, | |
1161 | (ctx->glyph->height + ctx->glyph->offset_y) + dy); | |
1162 | if (dx < ctx->bounds.x) | |
1163 | { | |
1164 | ctx->bounds.width += ctx->bounds.x - dx; | |
1165 | ctx->bounds.x = dx; | |
1166 | } | |
1167 | if (ctx->bounds.y > -src->height - dy) | |
1168 | { | |
1169 | ctx->bounds.height += ctx->bounds.y - (-src->height - dy); | |
1170 | ctx->bounds.y = (-src->height - dy); | |
1171 | } | |
1172 | if (dx + src->width - ctx->bounds.x >= (signed) ctx->bounds.width) | |
1173 | ctx->bounds.width = dx + src->width - ctx->bounds.x + 1; | |
1174 | if ((signed) ctx->bounds.height < src->height + (-src->height - dy) | |
1175 | - ctx->bounds.y) | |
1176 | ctx->bounds.height = src->height + (-src->height - dy) - ctx->bounds.y; | |
1177 | } | |
1178 | ||
1179 | /* Helper for blit_comb. */ | |
1180 | static inline void | |
1181 | add_device_width (int val, struct blit_comb_ctx *ctx) | |
1182 | { | |
1183 | if (ctx->glyph) | |
1184 | ctx->glyph->device_width += val; | |
1185 | if (ctx->device_width) | |
1186 | *ctx->device_width += val; | |
1187 | } | |
1188 | ||
4361ca1c VS |
1189 | static void |
1190 | blit_comb (const struct grub_unicode_glyph *glyph_id, | |
1191 | struct grub_font_glyph *glyph, | |
1192 | struct grub_video_signed_rect *bounds_out, | |
1193 | struct grub_font_glyph *main_glyph, | |
a87add6d | 1194 | struct grub_font_glyph **combining_glyphs, int *device_width) |
4361ca1c | 1195 | { |
d44892fe CW |
1196 | struct blit_comb_ctx ctx = { |
1197 | .glyph = glyph, | |
1198 | .device_width = device_width | |
1199 | }; | |
4361ca1c | 1200 | unsigned i; |
09d708c6 | 1201 | signed above_rightx, above_righty; |
7624beba | 1202 | signed above_leftx, above_lefty; |
45511ee9 | 1203 | signed below_rightx, below_righty; |
7624beba | 1204 | signed min_devwidth = 0; |
4361ca1c | 1205 | |
0a239a82 VS |
1206 | if (glyph) |
1207 | glyph->device_width = main_glyph->device_width; | |
1208 | if (device_width) | |
1209 | *device_width = main_glyph->device_width; | |
1210 | ||
d44892fe CW |
1211 | ctx.bounds.x = main_glyph->offset_x; |
1212 | ctx.bounds.y = main_glyph->offset_y; | |
1213 | ctx.bounds.width = main_glyph->width; | |
1214 | ctx.bounds.height = main_glyph->height; | |
4361ca1c | 1215 | |
7624beba | 1216 | above_rightx = main_glyph->offset_x + main_glyph->width; |
d44892fe | 1217 | above_righty = ctx.bounds.y + ctx.bounds.height; |
09d708c6 | 1218 | |
7624beba | 1219 | above_leftx = main_glyph->offset_x; |
d44892fe | 1220 | above_lefty = ctx.bounds.y + ctx.bounds.height; |
7624beba | 1221 | |
d44892fe CW |
1222 | below_rightx = ctx.bounds.x + ctx.bounds.width; |
1223 | below_righty = ctx.bounds.y; | |
45511ee9 | 1224 | |
4361ca1c VS |
1225 | for (i = 0; i < glyph_id->ncomb; i++) |
1226 | { | |
4361ca1c | 1227 | grub_int16_t space = 0; |
832d1370 | 1228 | /* Center by default. */ |
e6d428c1 | 1229 | grub_int16_t targetx; |
a87add6d | 1230 | |
4361ca1c VS |
1231 | if (!combining_glyphs[i]) |
1232 | continue; | |
d44892fe | 1233 | targetx = (ctx.bounds.width - combining_glyphs[i]->width) / 2 + ctx.bounds.x; |
1876cfdb | 1234 | /* CGJ is to avoid diacritics reordering. */ |
a87add6d VS |
1235 | if (glyph_id->combining[i].code |
1236 | == GRUB_UNICODE_COMBINING_GRAPHEME_JOINER) | |
1876cfdb | 1237 | continue; |
53c648d2 | 1238 | switch (glyph_id->combining[i].type) |
4361ca1c VS |
1239 | { |
1240 | case GRUB_UNICODE_COMB_OVERLAY: | |
1241 | do_blit (combining_glyphs[i], | |
832d1370 | 1242 | targetx, |
d44892fe CW |
1243 | (ctx.bounds.height - combining_glyphs[i]->height) / 2 |
1244 | - (ctx.bounds.height + ctx.bounds.y), &ctx); | |
7624beba VS |
1245 | if (min_devwidth < combining_glyphs[i]->width) |
1246 | min_devwidth = combining_glyphs[i]->width; | |
4361ca1c VS |
1247 | break; |
1248 | ||
0a71a097 | 1249 | case GRUB_UNICODE_COMB_ATTACHED_ABOVE_RIGHT: |
d44892fe | 1250 | do_blit (combining_glyphs[i], above_rightx, -above_righty, &ctx); |
0a71a097 | 1251 | above_rightx += combining_glyphs[i]->width; |
0a71a097 VS |
1252 | break; |
1253 | ||
09d708c6 VS |
1254 | case GRUB_UNICODE_COMB_ABOVE_RIGHT: |
1255 | do_blit (combining_glyphs[i], above_rightx, | |
d44892fe | 1256 | -(above_righty + combining_glyphs[i]->height), &ctx); |
09d708c6 | 1257 | above_rightx += combining_glyphs[i]->width; |
7624beba VS |
1258 | break; |
1259 | ||
1260 | case GRUB_UNICODE_COMB_ABOVE_LEFT: | |
1261 | above_leftx -= combining_glyphs[i]->width; | |
1262 | do_blit (combining_glyphs[i], above_leftx, | |
d44892fe | 1263 | -(above_lefty + combining_glyphs[i]->height), &ctx); |
09d708c6 VS |
1264 | break; |
1265 | ||
45511ee9 | 1266 | case GRUB_UNICODE_COMB_BELOW_RIGHT: |
d44892fe | 1267 | do_blit (combining_glyphs[i], below_rightx, below_righty, &ctx); |
45511ee9 | 1268 | below_rightx += combining_glyphs[i]->width; |
45511ee9 VS |
1269 | break; |
1270 | ||
832d1370 VS |
1271 | case GRUB_UNICODE_COMB_HEBREW_HOLAM: |
1272 | if (glyph_id->base != GRUB_UNICODE_HEBREW_WAW) | |
a87add6d VS |
1273 | targetx = |
1274 | main_glyph->offset_x - combining_glyphs[i]->width - | |
1275 | (combining_glyphs[i]->width + 3) / 4; | |
832d1370 VS |
1276 | goto above_on_main; |
1277 | ||
1278 | case GRUB_UNICODE_COMB_HEBREW_SIN_DOT: | |
1279 | targetx = main_glyph->offset_x + combining_glyphs[i]->width / 4; | |
1280 | goto above_on_main; | |
1281 | ||
1282 | case GRUB_UNICODE_COMB_HEBREW_SHIN_DOT: | |
a87add6d VS |
1283 | targetx = |
1284 | main_glyph->width + main_glyph->offset_x - | |
1285 | combining_glyphs[i]->width; | |
832d1370 VS |
1286 | above_on_main: |
1287 | space = combining_glyphs[i]->offset_y | |
1288 | - grub_font_get_xheight (combining_glyphs[i]->font) - 1; | |
1289 | if (space <= 0) | |
1290 | space = 1 + (grub_font_get_xheight (main_glyph->font)) / 8; | |
1291 | do_blit (combining_glyphs[i], targetx, | |
1292 | -(main_glyph->height + main_glyph->offset_y + space | |
d44892fe | 1293 | + combining_glyphs[i]->height), &ctx); |
832d1370 VS |
1294 | if (min_devwidth < combining_glyphs[i]->width) |
1295 | min_devwidth = combining_glyphs[i]->width; | |
1296 | break; | |
1297 | ||
e2588ccb VS |
1298 | /* TODO: Put dammah, fathah and alif nearer to shadda. */ |
1299 | case GRUB_UNICODE_COMB_SYRIAC_SUPERSCRIPT_ALAPH: | |
ad109fe0 VS |
1300 | case GRUB_UNICODE_COMB_ARABIC_DAMMAH: |
1301 | case GRUB_UNICODE_COMB_ARABIC_DAMMATAN: | |
1302 | case GRUB_UNICODE_COMB_ARABIC_FATHATAN: | |
1303 | case GRUB_UNICODE_COMB_ARABIC_FATHAH: | |
e2588ccb | 1304 | case GRUB_UNICODE_COMB_ARABIC_SUPERSCRIPT_ALIF: |
ad109fe0 VS |
1305 | case GRUB_UNICODE_COMB_ARABIC_SUKUN: |
1306 | case GRUB_UNICODE_COMB_ARABIC_SHADDA: | |
832d1370 | 1307 | case GRUB_UNICODE_COMB_HEBREW_RAFE: |
4361ca1c | 1308 | case GRUB_UNICODE_STACK_ABOVE: |
0546172e | 1309 | stacked_above: |
4361ca1c | 1310 | space = combining_glyphs[i]->offset_y |
832d1370 VS |
1311 | - grub_font_get_xheight (combining_glyphs[i]->font) - 1; |
1312 | if (space <= 0) | |
4361ca1c | 1313 | space = 1 + (grub_font_get_xheight (main_glyph->font)) / 8; |
a87add6d VS |
1314 | |
1315 | case GRUB_UNICODE_STACK_ATTACHED_ABOVE: | |
832d1370 | 1316 | do_blit (combining_glyphs[i], targetx, |
d44892fe CW |
1317 | -(ctx.bounds.height + ctx.bounds.y + space |
1318 | + combining_glyphs[i]->height), &ctx); | |
7624beba VS |
1319 | if (min_devwidth < combining_glyphs[i]->width) |
1320 | min_devwidth = combining_glyphs[i]->width; | |
4361ca1c VS |
1321 | break; |
1322 | ||
0a2d5a82 VS |
1323 | case GRUB_UNICODE_COMB_HEBREW_DAGESH: |
1324 | do_blit (combining_glyphs[i], targetx, | |
d44892fe CW |
1325 | -(ctx.bounds.height / 2 + ctx.bounds.y |
1326 | + combining_glyphs[i]->height / 2), &ctx); | |
0a2d5a82 VS |
1327 | if (min_devwidth < combining_glyphs[i]->width) |
1328 | min_devwidth = combining_glyphs[i]->width; | |
1329 | break; | |
1330 | ||
832d1370 VS |
1331 | case GRUB_UNICODE_COMB_HEBREW_SHEVA: |
1332 | case GRUB_UNICODE_COMB_HEBREW_HIRIQ: | |
1333 | case GRUB_UNICODE_COMB_HEBREW_QAMATS: | |
1334 | case GRUB_UNICODE_COMB_HEBREW_TSERE: | |
1335 | case GRUB_UNICODE_COMB_HEBREW_SEGOL: | |
832d1370 VS |
1336 | /* TODO: placement in final kaf and under reish. */ |
1337 | ||
1338 | case GRUB_UNICODE_COMB_HEBREW_HATAF_SEGOL: | |
1339 | case GRUB_UNICODE_COMB_HEBREW_HATAF_PATAH: | |
1340 | case GRUB_UNICODE_COMB_HEBREW_HATAF_QAMATS: | |
1341 | case GRUB_UNICODE_COMB_HEBREW_PATAH: | |
1342 | case GRUB_UNICODE_COMB_HEBREW_QUBUTS: | |
1343 | case GRUB_UNICODE_COMB_HEBREW_METEG: | |
ad109fe0 VS |
1344 | /* TODO: Put kasra and kasratan under shadda. */ |
1345 | case GRUB_UNICODE_COMB_ARABIC_KASRA: | |
1346 | case GRUB_UNICODE_COMB_ARABIC_KASRATAN: | |
9d9dca02 VS |
1347 | /* I don't know how ypogegrammeni differs from subscript. */ |
1348 | case GRUB_UNICODE_COMB_YPOGEGRAMMENI: | |
4361ca1c | 1349 | case GRUB_UNICODE_STACK_BELOW: |
0546172e | 1350 | stacked_below: |
a87add6d | 1351 | space = -(combining_glyphs[i]->offset_y |
4361ca1c | 1352 | + combining_glyphs[i]->height); |
ad109fe0 | 1353 | if (space <= 0) |
4361ca1c | 1354 | space = 1 + (grub_font_get_xheight (main_glyph->font)) / 8; |
a87add6d | 1355 | |
4361ca1c | 1356 | case GRUB_UNICODE_STACK_ATTACHED_BELOW: |
d44892fe CW |
1357 | do_blit (combining_glyphs[i], targetx, -(ctx.bounds.y - space), |
1358 | &ctx); | |
7624beba VS |
1359 | if (min_devwidth < combining_glyphs[i]->width) |
1360 | min_devwidth = combining_glyphs[i]->width; | |
4361ca1c VS |
1361 | break; |
1362 | ||
0546172e VS |
1363 | case GRUB_UNICODE_COMB_MN: |
1364 | switch (glyph_id->combining[i].code) | |
1365 | { | |
1366 | case GRUB_UNICODE_THAANA_ABAFILI: | |
1367 | case GRUB_UNICODE_THAANA_AABAAFILI: | |
1368 | case GRUB_UNICODE_THAANA_UBUFILI: | |
1369 | case GRUB_UNICODE_THAANA_OOBOOFILI: | |
1370 | case GRUB_UNICODE_THAANA_EBEFILI: | |
1371 | case GRUB_UNICODE_THAANA_EYBEYFILI: | |
1372 | case GRUB_UNICODE_THAANA_OBOFILI: | |
1373 | case GRUB_UNICODE_THAANA_OABOAFILI: | |
1374 | case GRUB_UNICODE_THAANA_SUKUN: | |
1375 | goto stacked_above; | |
1376 | case GRUB_UNICODE_THAANA_IBIFILI: | |
1377 | case GRUB_UNICODE_THAANA_EEBEEFILI: | |
a87add6d | 1378 | goto stacked_below; |
0546172e VS |
1379 | } |
1380 | /* Fall through. */ | |
4361ca1c VS |
1381 | default: |
1382 | { | |
1383 | /* Default handling. Just draw combining character on top | |
1384 | of base character. | |
1385 | FIXME: support more unicode types correctly. | |
a87add6d | 1386 | */ |
4361ca1c VS |
1387 | do_blit (combining_glyphs[i], |
1388 | main_glyph->device_width | |
a87add6d VS |
1389 | + combining_glyphs[i]->offset_x, |
1390 | -(combining_glyphs[i]->height | |
d44892fe CW |
1391 | + combining_glyphs[i]->offset_y), &ctx); |
1392 | add_device_width (combining_glyphs[i]->device_width, &ctx); | |
4361ca1c VS |
1393 | } |
1394 | } | |
1395 | } | |
a87add6d VS |
1396 | add_device_width ((above_rightx > |
1397 | below_rightx ? above_rightx : below_rightx) - | |
d44892fe CW |
1398 | (main_glyph->offset_x + main_glyph->width), &ctx); |
1399 | add_device_width (above_leftx - main_glyph->offset_x, &ctx); | |
7624beba | 1400 | if (glyph && glyph->device_width < min_devwidth) |
a87add6d | 1401 | glyph->device_width = min_devwidth; |
7624beba VS |
1402 | if (device_width && *device_width < min_devwidth) |
1403 | *device_width = min_devwidth; | |
1404 | ||
4361ca1c | 1405 | if (bounds_out) |
d44892fe | 1406 | *bounds_out = ctx.bounds; |
4361ca1c VS |
1407 | } |
1408 | ||
72f12cdc | 1409 | static struct grub_font_glyph * |
0a239a82 VS |
1410 | grub_font_construct_dry_run (grub_font_t hinted_font, |
1411 | const struct grub_unicode_glyph *glyph_id, | |
1412 | struct grub_video_signed_rect *bounds, | |
1413 | struct grub_font_glyph ***combining_glyphs_out, | |
1414 | int *device_width) | |
72f12cdc | 1415 | { |
e6d428c1 | 1416 | struct grub_font_glyph *main_glyph = NULL; |
72f12cdc | 1417 | struct grub_font_glyph **combining_glyphs; |
e6d428c1 | 1418 | grub_uint32_t desired_attributes = 0; |
4e5a96b0 VS |
1419 | unsigned i; |
1420 | grub_uint32_t base = glyph_id->base; | |
0a239a82 VS |
1421 | |
1422 | if (combining_glyphs_out) | |
1423 | *combining_glyphs_out = NULL; | |
72f12cdc | 1424 | |
e6d428c1 VS |
1425 | if (glyph_id->attributes & GRUB_UNICODE_GLYPH_ATTRIBUTE_RIGHT_JOINED) |
1426 | desired_attributes |= GRUB_FONT_CODE_RIGHT_JOINED; | |
1427 | ||
1428 | if (glyph_id->attributes & GRUB_UNICODE_GLYPH_ATTRIBUTE_LEFT_JOINED) | |
1429 | desired_attributes |= GRUB_FONT_CODE_LEFT_JOINED; | |
1430 | ||
4e5a96b0 VS |
1431 | |
1432 | if (base == 'i' || base == 'j') | |
1433 | { | |
1434 | for (i = 0; i < glyph_id->ncomb; i++) | |
1435 | if (glyph_id->combining[i].type == GRUB_UNICODE_STACK_ABOVE) | |
1436 | break; | |
1437 | if (i < glyph_id->ncomb && base == 'i') | |
1438 | base = GRUB_UNICODE_DOTLESS_LOWERCASE_I; | |
1439 | if (i < glyph_id->ncomb && base == 'j') | |
1440 | base = GRUB_UNICODE_DOTLESS_LOWERCASE_J; | |
1441 | } | |
1442 | ||
1443 | main_glyph = grub_font_get_glyph_with_fallback (hinted_font, base | |
e6d428c1 VS |
1444 | | desired_attributes); |
1445 | ||
1446 | if (!main_glyph) | |
1447 | main_glyph = grub_font_get_glyph_with_fallback (hinted_font, | |
4e5a96b0 | 1448 | base); |
72f12cdc | 1449 | |
53f312c1 | 1450 | /* Glyph not available in any font. Use ASCII fallback. */ |
72f12cdc | 1451 | if (!main_glyph) |
4e5a96b0 | 1452 | main_glyph = ascii_glyph_lookup (base); |
53f312c1 VS |
1453 | |
1454 | /* Glyph not available in any font. Return unknown glyph. */ | |
1455 | if (!main_glyph) | |
0a239a82 VS |
1456 | return NULL; |
1457 | ||
1458 | if (device_width) | |
1459 | *device_width = main_glyph->device_width; | |
72f12cdc | 1460 | |
97ea65d4 | 1461 | if (!glyph_id->ncomb && !glyph_id->attributes) |
0a239a82 | 1462 | return main_glyph; |
72f12cdc VS |
1463 | |
1464 | combining_glyphs = grub_malloc (sizeof (combining_glyphs[0]) | |
1465 | * glyph_id->ncomb); | |
97ea65d4 | 1466 | if (glyph_id->ncomb && !combining_glyphs) |
72f12cdc VS |
1467 | { |
1468 | grub_errno = GRUB_ERR_NONE; | |
0a239a82 | 1469 | return main_glyph; |
72f12cdc | 1470 | } |
a87add6d | 1471 | |
4e5a96b0 VS |
1472 | for (i = 0; i < glyph_id->ncomb; i++) |
1473 | combining_glyphs[i] | |
1474 | = grub_font_get_glyph_with_fallback (main_glyph->font, | |
1475 | glyph_id->combining[i].code); | |
82c5d8dc | 1476 | |
a87add6d VS |
1477 | blit_comb (glyph_id, NULL, bounds, main_glyph, combining_glyphs, |
1478 | device_width); | |
0a239a82 VS |
1479 | if (combining_glyphs_out) |
1480 | *combining_glyphs_out = combining_glyphs; | |
1481 | else | |
1482 | grub_free (combining_glyphs); | |
1483 | ||
1484 | return main_glyph; | |
1485 | } | |
1486 | ||
1487 | int | |
1488 | grub_font_get_constructed_device_width (grub_font_t hinted_font, | |
a87add6d VS |
1489 | const struct grub_unicode_glyph |
1490 | *glyph_id) | |
0a239a82 VS |
1491 | { |
1492 | int ret; | |
1493 | struct grub_font_glyph *main_glyph; | |
1494 | main_glyph = grub_font_construct_dry_run (hinted_font, glyph_id, NULL, | |
1495 | NULL, &ret); | |
1496 | if (!main_glyph) | |
1497 | return unknown_glyph->device_width; | |
1498 | return ret; | |
1499 | } | |
1500 | ||
1501 | struct grub_font_glyph * | |
1502 | grub_font_construct_glyph (grub_font_t hinted_font, | |
1503 | const struct grub_unicode_glyph *glyph_id) | |
1504 | { | |
1505 | struct grub_font_glyph *main_glyph; | |
1506 | struct grub_video_signed_rect bounds; | |
1507 | struct grub_font_glyph *glyph; | |
1508 | struct grub_font_glyph **combining_glyphs; | |
1509 | ||
1510 | main_glyph = grub_font_construct_dry_run (hinted_font, glyph_id, | |
1511 | &bounds, &combining_glyphs, NULL); | |
1512 | ||
1513 | if (!main_glyph) | |
1514 | return grub_font_dup_glyph (unknown_glyph); | |
97ea65d4 | 1515 | |
0a239a82 VS |
1516 | if (!combining_glyphs) |
1517 | return grub_font_dup_glyph (main_glyph); | |
a87add6d VS |
1518 | |
1519 | glyph = | |
1520 | grub_zalloc (sizeof (*glyph) + (bounds.width * bounds.height + 7) / 8); | |
72f12cdc VS |
1521 | if (!glyph) |
1522 | { | |
1523 | grub_errno = GRUB_ERR_NONE; | |
1524 | return grub_font_dup_glyph (main_glyph); | |
1525 | } | |
1526 | ||
0a239a82 | 1527 | glyph->font = main_glyph->font; |
4361ca1c VS |
1528 | glyph->width = bounds.width; |
1529 | glyph->height = bounds.height; | |
1530 | glyph->offset_x = bounds.x; | |
1531 | glyph->offset_y = bounds.y; | |
72f12cdc | 1532 | |
97ea65d4 VS |
1533 | if (glyph_id->attributes & GRUB_UNICODE_GLYPH_ATTRIBUTE_MIRROR) |
1534 | grub_font_blit_glyph_mirror (glyph, main_glyph, | |
4361ca1c VS |
1535 | main_glyph->offset_x - glyph->offset_x, |
1536 | (glyph->height + glyph->offset_y) | |
a87add6d VS |
1537 | - (main_glyph->height + |
1538 | main_glyph->offset_y)); | |
97ea65d4 | 1539 | else |
4361ca1c VS |
1540 | grub_font_blit_glyph (glyph, main_glyph, |
1541 | main_glyph->offset_x - glyph->offset_x, | |
1542 | (glyph->height + glyph->offset_y) | |
97ea65d4 VS |
1543 | - (main_glyph->height + main_glyph->offset_y)); |
1544 | ||
0a239a82 | 1545 | blit_comb (glyph_id, glyph, NULL, main_glyph, combining_glyphs, NULL); |
72f12cdc VS |
1546 | |
1547 | return glyph; | |
1548 | } | |
1e901a75 | 1549 | |
1550 | /* Draw the specified glyph at (x, y). The y coordinate designates the | |
1551 | baseline of the character, while the x coordinate designates the left | |
1552 | side location of the character. */ | |
1553 | grub_err_t | |
1118c32e VS |
1554 | grub_font_draw_glyph (struct grub_font_glyph * glyph, |
1555 | grub_video_color_t color, int left_x, int baseline_y) | |
1e901a75 | 1556 | { |
1557 | struct grub_video_bitmap glyph_bitmap; | |
1558 | ||
1559 | /* Don't try to draw empty glyphs (U+0020, etc.). */ | |
1560 | if (glyph->width == 0 || glyph->height == 0) | |
1561 | return GRUB_ERR_NONE; | |
1562 | ||
1563 | glyph_bitmap.mode_info.width = glyph->width; | |
1564 | glyph_bitmap.mode_info.height = glyph->height; | |
a87add6d VS |
1565 | glyph_bitmap.mode_info.mode_type |
1566 | = (1 << GRUB_VIDEO_MODE_TYPE_DEPTH_POS) | GRUB_VIDEO_MODE_TYPE_1BIT_BITMAP; | |
1e901a75 | 1567 | glyph_bitmap.mode_info.blit_format = GRUB_VIDEO_BLIT_FORMAT_1BIT_PACKED; |
1568 | glyph_bitmap.mode_info.bpp = 1; | |
b39f9d20 | 1569 | |
1e901a75 | 1570 | /* Really 1 bit per pixel. */ |
1571 | glyph_bitmap.mode_info.bytes_per_pixel = 0; | |
b39f9d20 | 1572 | |
1e901a75 | 1573 | /* Packed densely as bits. */ |
1574 | glyph_bitmap.mode_info.pitch = glyph->width; | |
b39f9d20 | 1575 | |
1e901a75 | 1576 | glyph_bitmap.mode_info.number_of_colors = 2; |
1577 | glyph_bitmap.mode_info.bg_red = 0; | |
1578 | glyph_bitmap.mode_info.bg_green = 0; | |
1579 | glyph_bitmap.mode_info.bg_blue = 0; | |
1580 | glyph_bitmap.mode_info.bg_alpha = 0; | |
1118c32e VS |
1581 | grub_video_unmap_color (color, |
1582 | &glyph_bitmap.mode_info.fg_red, | |
1583 | &glyph_bitmap.mode_info.fg_green, | |
1584 | &glyph_bitmap.mode_info.fg_blue, | |
1585 | &glyph_bitmap.mode_info.fg_alpha); | |
1e901a75 | 1586 | glyph_bitmap.data = glyph->bitmap; |
1587 | ||
1588 | int bitmap_left = left_x + glyph->offset_x; | |
1589 | int bitmap_bottom = baseline_y - glyph->offset_y; | |
1590 | int bitmap_top = bitmap_bottom - glyph->height; | |
1591 | ||
1592 | return grub_video_blit_bitmap (&glyph_bitmap, GRUB_VIDEO_BLIT_BLEND, | |
1118c32e VS |
1593 | bitmap_left, bitmap_top, |
1594 | 0, 0, glyph->width, glyph->height); | |
1e901a75 | 1595 | } |