1 /*******************************************************************************
2 * TrueType font-related functions for Wine PostScript driver. Currently just
3 * uses FreeType to read font metrics.
5 * Copyright 2001 Ian Pilcher
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this library; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 * NOTE: Many of the functions in this file can return either fatal errors
22 * (memory allocation failure or unexpected FreeType error) or non-fatal
23 * errors (unusable font file). Fatal errors are indicated by returning
24 * FALSE; see individual function descriptions for how they indicate non-
29 #include "wine/port.h"
34 * These stupid #ifdefs should work for FreeType 2.0.1 and 2.0.2. Beyond that
38 #ifdef HAVE_FT2BUILD_H
41 #ifdef HAVE_FREETYPE_FREETYPE_H
42 #include <freetype/freetype.h>
44 #ifdef HAVE_FREETYPE_FTGLYPH_H
45 #include <freetype/ftglyph.h>
47 #ifdef HAVE_FREETYPE_TTTABLES_H
48 #include <freetype/tttables.h>
50 #ifdef HAVE_FREETYPE_FTSNAMES_H
51 #include <freetype/ftsnames.h>
53 # ifdef HAVE_FREETYPE_FTNAMES_H
54 # include <freetype/ftnames.h>
57 #ifdef HAVE_FREETYPE_TTNAMEID_H
58 #include <freetype/ttnameid.h>
61 #include <sys/types.h>
73 #include "wine/debug.h"
75 WINE_DEFAULT_DEBUG_CHANNEL(psdrv);
77 #define REQUIRED_FACE_FLAGS ( FT_FACE_FLAG_SCALABLE | \
78 FT_FACE_FLAG_HORIZONTAL | \
80 FT_FACE_FLAG_GLYPH_NAMES )
82 #define GLYPH_LOAD_FLAGS ( FT_LOAD_NO_SCALE | \
83 FT_LOAD_IGNORE_TRANSFORM | \
84 FT_LOAD_LINEAR_DESIGN )
86 #ifndef SONAME_LIBFREETYPE
87 #define SONAME_LIBFREETYPE "libfreetype.so"
90 static void *ft_handle = NULL;
92 #define MAKE_FUNCPTR(f) static typeof(f) * p##f = NULL;
93 MAKE_FUNCPTR(FT_Done_Face)
94 MAKE_FUNCPTR(FT_Done_FreeType)
95 MAKE_FUNCPTR(FT_Get_Char_Index)
96 MAKE_FUNCPTR(FT_Get_Glyph_Name)
97 MAKE_FUNCPTR(FT_Get_Sfnt_Name)
98 MAKE_FUNCPTR(FT_Get_Sfnt_Name_Count)
99 MAKE_FUNCPTR(FT_Get_Sfnt_Table)
100 MAKE_FUNCPTR(FT_Init_FreeType)
101 MAKE_FUNCPTR(FT_Load_Glyph)
102 MAKE_FUNCPTR(FT_New_Face)
103 MAKE_FUNCPTR(FT_Set_Charmap)
106 /*******************************************************************************
109 * Finds Windows character map and creates "EncodingScheme" string. Returns
110 * FALSE to indicate memory allocation or FreeType error; sets *p_charmap to
111 * NULL if no Windows encoding is present.
113 * Returns Unicode character map if present; otherwise uses the first Windows
114 * character map found.
117 static const LPCSTR encoding_names[7] =
119 "WindowsSymbol", /* TT_MS_ID_SYMBOL_CS */
120 "WindowsUnicode", /* TT_MS_ID_UNICODE_CS */
121 "WindowsShiftJIS", /* TT_MS_ID_SJIS */
122 "WindowsPRC", /* TT_MS_ID_GB2312 */
123 "WindowsBig5", /* TT_MS_ID_BIG_5 */
124 "WindowsWansung", /* TT_MS_ID_WANSUNG */
125 "WindowsJohab" /* TT_MS_ID_JOHAB */
126 /* "WindowsUnknown65535" is the longest possible (encoding_id is a UShort) */
129 static BOOL FindCharMap(FT_Face face, FT_CharMap *p_charmap, LPSTR *p_sz)
133 FT_CharMap charmap = NULL;
135 for (i = 0; i < face->num_charmaps; ++i)
137 if (face->charmaps[i]->platform_id != TT_PLATFORM_MICROSOFT)
140 if (face->charmaps[i]->encoding_id == TT_MS_ID_UNICODE_CS)
142 charmap = face->charmaps[i];
147 charmap = face->charmaps[i];
150 *p_charmap = charmap;
154 WARN("No Windows character map found\n");
158 error = pFT_Set_Charmap(face, charmap);
159 if (error != FT_Err_Ok)
161 ERR("%s returned %i\n", "FT_Set_Charmap", error);
165 *p_sz = HeapAlloc(PSDRV_Heap, 0, sizeof("WindowsUnknown65535"));
169 if (charmap->encoding_id < 7)
170 strcpy(*p_sz, encoding_names[charmap->encoding_id]);
172 sprintf(*p_sz, "%s%u", "WindowsUnknown", charmap->encoding_id);
177 /*******************************************************************************
180 * Converts a string in the TrueType NAME table to a null-terminated ASCII
181 * character string. Space for the string is allocated from the driver heap.
182 * Only handles platform_id = 3 (TT_PLATFORM_MICROSOFT) strings (16-bit, big
183 * endian). It also only handles ASCII character codes (< 128).
185 * Sets *p_sz to NULL if string cannot be converted; only returns FALSE for
186 * memory allocation failure.
189 static BOOL MSTTStrToSz(const FT_SfntName *name, LPSTR *p_sz)
196 len = name->string_len / 2; /* # of 16-bit chars */
198 *p_sz = sz = HeapAlloc(PSDRV_Heap, 0, len + 1);
202 wsz = (BYTE *)name->string;
204 for (i = 0; i < len; ++i, ++sz)
206 USHORT wc = (wsz[0] << 8) + wsz[1];
211 WARN("Non-ASCII character 0x%.4x\n", wc);
212 HeapFree(PSDRV_Heap, 0, *p_sz);
225 /*******************************************************************************
228 * Finds the requested Microsoft platform string in the TrueType NAME table and
229 * converts it to a null-terminated ASCII string. Currently looks for U.S.
230 * English names only.
232 * Sets string to NULL if not present or cannot be converted; returns FALSE
233 * only for memory allocation failure.
236 static BOOL FindMSTTString(FT_Face face, FT_CharMap charmap, FT_UShort name_id,
239 FT_UInt num_strings, string_index;
243 num_strings = pFT_Get_Sfnt_Name_Count(face);
245 for (string_index = 0; string_index < num_strings; ++string_index)
247 error = pFT_Get_Sfnt_Name(face, string_index, &name);
248 if (error != FT_Err_Ok)
250 ERR("%s returned %i\n", "FT_Get_Sfnt_Name", error);
254 /* FIXME - Handle other languages? */
256 if (name.platform_id != TT_PLATFORM_MICROSOFT ||
257 name.language_id != TT_MS_LANGID_ENGLISH_UNITED_STATES)
260 if (name.platform_id != charmap->platform_id ||
261 name.encoding_id != charmap->encoding_id)
264 if (name.name_id != name_id)
267 return MSTTStrToSz(&name, p_sz);
270 *p_sz = NULL; /* didn't find it */
275 /*******************************************************************************
278 * Convert TrueType font units (relative to font em square) to PostScript
282 inline static float PSUnits(LONG x, USHORT em_size)
284 return 1000.0 * (float)x / (float)em_size;
287 /*******************************************************************************
290 * Allocates space for the AFM on the driver heap and reads basic font metrics
291 * from the HEAD, POST, HHEA, and OS/2 tables. Returns FALSE for memory
292 * allocation error; sets *p_afm to NULL if required information is missing.
295 static BOOL StartAFM(FT_Face face, AFM **p_afm)
304 head = pFT_Get_Sfnt_Table(face, ft_sfnt_head);
305 post = pFT_Get_Sfnt_Table(face, ft_sfnt_post);
306 os2 = pFT_Get_Sfnt_Table(face, ft_sfnt_os2);
307 hhea = pFT_Get_Sfnt_Table(face, ft_sfnt_hhea);
309 if (head == NULL || post == NULL || os2 == NULL || hhea == NULL ||
310 os2->version == 0xffff) /* old Macintosh font */
312 WARN("Required table(s) missing\n");
317 *p_afm = afm = HeapAlloc(PSDRV_Heap, 0, sizeof(*afm));
321 afm->WinMetrics.usUnitsPerEm = em_size = head->Units_Per_EM;
322 afm->WinMetrics.sAscender = hhea->Ascender;
323 afm->WinMetrics.sDescender = hhea->Descender;
324 afm->WinMetrics.sLineGap = hhea->Line_Gap;
325 afm->WinMetrics.sTypoAscender = os2->sTypoAscender;
326 afm->WinMetrics.sTypoDescender = os2->sTypoDescender;
327 afm->WinMetrics.sTypoLineGap = os2->sTypoLineGap;
328 afm->WinMetrics.usWinAscent = os2->usWinAscent;
329 afm->WinMetrics.usWinDescent = os2->usWinDescent;
330 afm->WinMetrics.sAvgCharWidth = os2->xAvgCharWidth;
332 afm->Weight = os2->usWeightClass;
333 afm->ItalicAngle = ((float)(post->italicAngle)) / 65536.0;
334 afm->IsFixedPitch = (post-> isFixedPitch == 0) ? FALSE : TRUE;
335 afm->UnderlinePosition = PSUnits(post->underlinePosition, em_size);
336 afm->UnderlineThickness = PSUnits(post->underlineThickness, em_size);
338 afm->FontBBox.llx = PSUnits(head->xMin, em_size);
339 afm->FontBBox.lly = PSUnits(head->yMin, em_size);
340 afm->FontBBox.urx = PSUnits(head->xMax, em_size);
341 afm->FontBBox.ury = PSUnits(head->yMax, em_size);
343 afm->Ascender = PSUnits(os2->sTypoAscender, em_size);
344 afm->Descender = PSUnits(os2->sTypoDescender, em_size);
349 /*******************************************************************************
352 * Reads metrics for each glyph in a TrueType font. Returns false for memory
353 * allocation or FreeType error; sets *p_metrics to NULL for non-fatal error.
356 static BOOL ReadCharMetrics(FT_Face face, AFM *afm, AFMMETRICS **p_metrics)
358 FT_ULong charcode, index;
360 USHORT em_size = afm->WinMetrics.usUnitsPerEm;
362 for (charcode = 0, index = 0; charcode < 65536; ++charcode)
363 if (pFT_Get_Char_Index(face, charcode) != 0)
364 ++index; /* count # of glyphs */
366 afm->NumofMetrics = index;
368 *p_metrics = metrics = HeapAlloc(PSDRV_Heap, 0, index * sizeof(*metrics));
372 for (charcode = 0, index = 0; charcode < 65536; ++charcode)
374 FT_UInt glyph_index = pFT_Get_Char_Index(face, charcode);
376 CHAR buffer[128]; /* for glyph names */
378 if (glyph_index == 0)
381 error = pFT_Load_Glyph(face, glyph_index, GLYPH_LOAD_FLAGS);
382 if (error != FT_Err_Ok)
384 ERR("%s returned %i\n", "FT_Load_Glyph", error);
388 error = pFT_Get_Glyph_Name(face, glyph_index, buffer, sizeof(buffer));
389 if (error != FT_Err_Ok)
391 ERR("%s returned %i\n", "FT_Get_Glyph_Name", error);
395 metrics[index].N = PSDRV_GlyphName(buffer);
396 if (metrics[index].N == NULL)
399 metrics[index].C = metrics[index].UV = charcode;
400 metrics[index].WX = PSUnits(face->glyph->metrics.horiAdvance, em_size);
405 if (afm->WinMetrics.sAvgCharWidth == 0)
406 afm->WinMetrics.sAvgCharWidth = PSDRV_CalcAvgCharWidth(afm);
411 HeapFree(PSDRV_Heap, 0, metrics);
416 /*******************************************************************************
419 * Builds the AFM for a TrueType font and adds it to the driver font list.
420 * Returns FALSE only on an unexpected error (memory allocation failure or
424 static BOOL BuildTrueTypeAFM(FT_Face face)
428 LPSTR font_name, full_name, family_name, encoding_scheme;
432 retval = StartAFM(face, &afm);
433 if (retval == FALSE || afm == NULL)
436 retval = FindCharMap(face, &charmap, &encoding_scheme);
437 if (retval == FALSE || charmap == NULL)
440 retval = FindMSTTString(face, charmap, TT_NAME_ID_PS_NAME, &font_name);
441 if (retval == FALSE || font_name == NULL)
442 goto cleanup_encoding_scheme;
444 retval = FindMSTTString(face, charmap, TT_NAME_ID_FULL_NAME, &full_name);
445 if (retval == FALSE || full_name == NULL)
446 goto cleanup_font_name;
448 retval = FindMSTTString(face, charmap, TT_NAME_ID_FONT_FAMILY,
450 if (retval == FALSE || family_name == NULL)
451 goto cleanup_full_name;
453 retval = ReadCharMetrics(face, afm, &metrics);
454 if (retval == FALSE || metrics == NULL)
455 goto cleanup_family_name;
457 afm->EncodingScheme = encoding_scheme; afm->FontName = font_name;
458 afm->FullName = full_name; afm->FamilyName = family_name;
459 afm->Metrics = metrics;
461 retval = PSDRV_AddAFMtoList(&PSDRV_AFMFontList, afm, &added);
462 if (retval == FALSE || added == FALSE)
463 goto cleanup_family_name;
467 /* clean up after fatal or non-fatal errors */
470 HeapFree(PSDRV_Heap, 0, family_name);
472 HeapFree(PSDRV_Heap, 0, full_name);
474 HeapFree(PSDRV_Heap, 0, font_name);
475 cleanup_encoding_scheme:
476 HeapFree(PSDRV_Heap, 0, encoding_scheme);
478 HeapFree(PSDRV_Heap, 0, afm);
483 /*******************************************************************************
486 * Reads font metrics from TrueType font file. Only returns FALSE for
487 * unexpected errors (memory allocation failure or FreeType error).
490 static BOOL ReadTrueTypeFile(FT_Library library, LPCSTR filename)
495 TRACE("%s\n", filename);
497 error = pFT_New_Face(library, filename, 0, &face);
498 if (error != FT_Err_Ok)
500 WARN("FreeType error %i opening %s\n", error, filename);
504 if ((face->face_flags & REQUIRED_FACE_FLAGS) == REQUIRED_FACE_FLAGS)
506 if (BuildTrueTypeAFM(face) == FALSE)
514 WARN("Required information missing from %s\n", filename);
517 error = pFT_Done_Face(face);
518 if (error != FT_Err_Ok)
520 ERR("%s returned %i\n", "FT_Done_Face", error);
527 /*******************************************************************************
530 * Reads all TrueType font files in a directory.
533 static BOOL ReadTrueTypeDir(FT_Library library, LPCSTR dirname)
539 dir = opendir(dirname);
542 WARN("'%s' opening %s\n", strerror(errno), dirname);
546 while ((dent = readdir(dir)) != NULL)
548 CHAR *file_extension = strrchr(dent->d_name, '.');
551 if (file_extension == NULL || strcasecmp(file_extension, ".ttf") != 0)
554 fn_len = snprintf(filename, 256, "%s/%s", dirname, dent->d_name);
555 if (fn_len < 0 || fn_len > sizeof(filename) - 1)
557 WARN("Path '%s/%s' is too long\n", dirname, dent->d_name);
561 if (ReadTrueTypeFile(library, filename) == FALSE)
573 /*******************************************************************************
574 * PSDRV_GetTrueTypeMetrics
576 * Reads font metrics from TrueType font files in directories listed in the
577 * [TrueType Font Directories] section of the Wine configuration file.
579 * If this function fails (returns FALSE), the driver will fail to initialize
580 * and the driver heap will be destroyed, so it's not necessary to HeapFree
581 * everything in that event.
584 BOOL PSDRV_GetTrueTypeMetrics(void)
586 CHAR name_buf[256], value_buf[256];
591 DWORD type, name_len, value_len;
593 if (RegOpenKeyExA(HKEY_LOCAL_MACHINE,
594 "Software\\Wine\\Wine\\Config\\TrueType Font Directories",
595 0, KEY_READ, &hkey) != ERROR_SUCCESS)
599 ft_handle = wine_dlopen(SONAME_LIBFREETYPE, RTLD_NOW, NULL, 0);
602 "Wine cannot find the FreeType font library. To enable Wine to\n"
603 "use TrueType fonts please install a version of FreeType greater than\n"
604 "or equal to 2.0.5.\n"
605 "http://www.freetype.org\n");
610 #define LOAD_FUNCPTR(f) if((p##f = wine_dlsym(ft_handle, #f, NULL, 0)) == NULL) goto sym_not_found;
611 LOAD_FUNCPTR(FT_Done_Face)
612 LOAD_FUNCPTR(FT_Done_FreeType)
613 LOAD_FUNCPTR(FT_Get_Char_Index)
614 LOAD_FUNCPTR(FT_Get_Glyph_Name)
615 LOAD_FUNCPTR(FT_Get_Sfnt_Name)
616 LOAD_FUNCPTR(FT_Get_Sfnt_Name_Count)
617 LOAD_FUNCPTR(FT_Get_Sfnt_Table)
618 LOAD_FUNCPTR(FT_Init_FreeType)
619 LOAD_FUNCPTR(FT_Load_Glyph)
620 LOAD_FUNCPTR(FT_New_Face)
621 LOAD_FUNCPTR(FT_Set_Charmap)
624 error = pFT_Init_FreeType(&library);
625 if (error != FT_Err_Ok)
627 ERR("%s returned %i\n", "FT_Init_FreeType", error);
628 wine_dlclose(ft_handle, NULL, 0);
633 name_len = sizeof(name_buf);
634 value_len = sizeof(value_buf);
636 while (RegEnumValueA(hkey, i++, name_buf, &name_len, NULL, &type, value_buf,
637 &value_len) == ERROR_SUCCESS)
639 value_buf[sizeof(value_buf) - 1] = '\0';
641 if (ReadTrueTypeDir(library, value_buf) == FALSE)
644 pFT_Done_FreeType(library);
648 /* initialize lengths for new iteration */
650 name_len = sizeof(name_buf);
651 value_len = sizeof(value_buf);
655 pFT_Done_FreeType(library);
656 wine_dlclose(ft_handle, NULL, 0);
662 "Wine cannot find certain functions that it needs inside the FreeType\n"
663 "font library. To enable Wine to use TrueType fonts please upgrade\n"
664 "FreeType to at least version 2.0.5.\n"
665 "http://www.freetype.org\n");
667 wine_dlclose(ft_handle, NULL, 0);
672 #endif /* HAVE_FREETYPE */