# fontcache.cpp

Go to the documentation of this file.

    00001 /* $Id: fontcache.cpp 16638 2009-06-23 20:48:48Z rubidium $ */
    00002
    00005 #include "stdafx.h"
    00006 #include "spritecache.h"
    00007 #include "fontcache.h"
    00008 #include "blitter/factory.hpp"
    00009 #include "gfx_func.h"
    00010 #include "core/alloc_func.hpp"
    00011 #include "core/math_func.hpp"
    00012
    00013 #include "table/sprites.h"
    00014 #include "table/control_codes.h"
    00015
    00016 #ifdef WITH_FREETYPE
    00017 #include <ft2build.h>
    00018 #include FT_FREETYPE_H
    00019 #include FT_GLYPH_H
    00020
    00021 #ifdef WITH_FONTCONFIG
    00022 #include <fontconfig/fontconfig.h>
    00023 #endif
    00024
    00025 static FT_Library _library = NULL;
    00026 static FT_Face _face_small = NULL;
    00027 static FT_Face _face_medium = NULL;
    00028 static FT_Face _face_large = NULL;
    00029
    00030 FreeTypeSettings _freetype;
    00031
    00032 enum {
    00033   FACE_COLOUR = 1,
    00034   SHADOW_COLOUR = 2,
    00035 };
    00036
    00039 #ifdef WIN32
    00040 #include <windows.h>
    00041 #include <shlobj.h> /* SHGetFolderPath */
    00042 #include "win32.h"
    00043
    00054 char *GetShortPath(const char *long_path)
    00055 {
    00056   static char short_path[MAX_PATH];
    00057 #ifdef UNICODE
    00058   /* The non-unicode GetShortPath doesn't support UTF-8...,
    00059    * so convert the path to wide chars, then get the short
    00060    * path and convert it back again. */
    00061   wchar_t long_path_w[MAX_PATH];
    00062   MultiByteToWideChar(CP_UTF8, 0, long_path, -1, long_path_w, MAX_PATH);
    00063
    00064   wchar_t short_path_w[MAX_PATH];
    00065   GetShortPathNameW(long_path_w, short_path_w, MAX_PATH);
    00066
    00067   WideCharToMultiByte(CP_ACP, 0, short_path_w, -1, short_path, MAX_PATH, NULL, NULL);
    00068 #else
    00069   /* Technically not needed, but do it for consistency. */
    00070   GetShortPathNameA(long_path, short_path, MAX_PATH);
    00071 #endif
    00072   return short_path;
    00073 }
    00074
    00075 /* Get the font file to be loaded into Freetype by looping the registry
    00076  * location where windows lists all installed fonts. Not very nice, will
    00077  * surely break if the registry path changes, but it works. Much better
    00078  * solution would be to use CreateFont, and extract the font data from it
    00079  * by GetFontData. The problem with this is that the font file needs to be
    00080  * kept in memory then until the font is no longer needed. This could mean
    00081  * an additional memory usage of 30MB (just for fonts!) when using an eastern
    00082  * font for all font sizes */
    00083 #define FONT_DIR_NT "SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Fonts"
    00084 #define FONT_DIR_9X "SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Fonts"
    00085 static FT_Error GetFontByFaceName(const char *font_name, FT_Face *face)
    00086 {
    00087   FT_Error err = FT_Err_Cannot_Open_Resource;
    00088   HKEY hKey;
    00089   LONG ret;
    00090   TCHAR vbuffer[MAX_PATH], dbuffer[256];
    00091   TCHAR *font_namep;
    00092   char *font_path;
    00093   uint index;
    00094
    00095   /* On windows NT (2000, NT3.5, XP, etc.) the fonts are stored in the
    00096    * "Windows NT" key, on Windows 9x in the Windows key. To save us having
    00097    * to retrieve the windows version, we'll just query both */
    00098   ret = RegOpenKeyEx(HKEY_LOCAL_MACHINE, _T(FONT_DIR_NT), 0, KEY_READ, &hKey);
    00099   if (ret != ERROR_SUCCESS) ret = RegOpenKeyEx(HKEY_LOCAL_MACHINE, _T(FONT_DIR_9X), 0, KEY_READ, &hKey);
    00100
    00101   if (ret != ERROR_SUCCESS) {
    00102     DEBUG(freetype, 0, "Cannot open registry key HKLM\\SOFTWARE\\Microsoft\\Windows (NT)\\CurrentVersion\\Fonts");
    00103     return err;
    00104   }
    00105
    00106   /* For Unicode we need some conversion between widechar and
    00107    * normal char to match the data returned by RegEnumValue,
    00108    * otherwise just use parameter */
    00109 #if defined(UNICODE)
    00110   font_namep = MallocT<TCHAR>(MAX_PATH);
    00111   MB_TO_WIDE_BUFFER(font_name, font_namep, MAX_PATH * sizeof(TCHAR));
    00112 #else
    00113   font_namep = (char*)font_name; // only cast because in unicode pointer is not const
    00114 #endif
    00115
    00116   for (index = 0;; index++) {
    00117     TCHAR *s;
    00118     DWORD vbuflen = lengthof(vbuffer);
    00119     DWORD dbuflen = lengthof(dbuffer);
    00120
    00121     ret = RegEnumValue(hKey, index, vbuffer, &vbuflen, NULL, NULL, (byte*)dbuffer, &dbuflen);
    00122     if (ret != ERROR_SUCCESS) goto registry_no_font_found;
    00123
    00124     /* The font names in the registry are of the following 3 forms:
    00125      * - ADMUI3.fon
    00126      * - Book Antiqua Bold (TrueType)
    00127      * - Batang & BatangChe & Gungsuh & GungsuhChe (TrueType)
    00128      * We will strip the font-type '()' if any and work with the font name
    00129      * itself, which must match exactly; if...
    00130      * TTC files, font files which contain more than one font are seperated
    00131      * byt '&'. Our best bet will be to do substr match for the fontname
    00132      * and then let FreeType figure out which index to load */
    00133     s = _tcschr(vbuffer, _T('('));
    00134     if (s != NULL) s[-1] = '\0';
    00135
    00136     if (_tcschr(vbuffer, _T('&')) == NULL) {
    00137       if (_tcsicmp(vbuffer, font_namep) == 0) break;
    00138     } else {
    00139       if (_tcsstr(vbuffer, font_namep) != NULL) break;
    00140     }
    00141   }
    00142
    00143   if (!SUCCEEDED(SHGetFolderPath(NULL, CSIDL_FONTS, NULL, SHGFP_TYPE_CURRENT, vbuffer))) {
    00144     DEBUG(freetype, 0, "SHGetFolderPath cannot return fonts directory");
    00145     goto folder_error;
    00146   }
    00147
    00148   /* Some fonts are contained in .ttc files, TrueType Collection fonts. These
    00149    * contain multiple fonts inside this single file. GetFontData however
    00150    * returns the whole file, so we need to check each font inside to get the
    00151    * proper font.
    00152    * Also note that FreeType does not support UNICODE filesnames! */
    00153 #if defined(UNICODE)
    00154   /* We need a cast here back from wide because FreeType doesn't support
    00155    * widechar filenames. Just use the buffer we allocated before for the
    00156    * font_name search */
    00157   font_path = (char*)font_namep;
    00158   WIDE_TO_MB_BUFFER(vbuffer, font_path, MAX_PATH * sizeof(TCHAR));
    00159 #else
    00160   font_path = vbuffer;
    00161 #endif
    00162
    00163   ttd_strlcat(font_path, "\\", MAX_PATH * sizeof(TCHAR));
    00164   ttd_strlcat(font_path, WIDE_TO_MB(dbuffer), MAX_PATH * sizeof(TCHAR));
    00165
    00166   /* Convert the path into something that FreeType understands */
    00167   font_path = GetShortPath(font_path);
    00168
    00169   index = 0;
    00170   do {
    00171     err = FT_New_Face(_library, font_path, index, face);
    00172     if (err != FT_Err_Ok) break;
    00173
    00174     if (strncasecmp(font_name, (*face)->family_name, strlen((*face)->family_name)) == 0) break;
    00175     /* Try english name if font name failed */
    00176     if (strncasecmp(font_name + strlen(font_name) + 1, (*face)->family_name, strlen((*face)->family_name)) == 0) break;
    00177     err = FT_Err_Cannot_Open_Resource;
    00178
    00179   } while ((FT_Long)++index != (*face)->num_faces);
    00180
    00181
    00182 folder_error:
    00183 registry_no_font_found:
    00184 #if defined(UNICODE)
    00185   free(font_namep);
    00186 #endif
    00187   RegCloseKey(hKey);
    00188   return err;
    00189 }
    00190
    00204 static const char *GetEnglishFontName(const ENUMLOGFONTEX *logfont)
    00205 {
    00206   static char font_name[MAX_PATH];
    00207   const char *ret_font_name = NULL;
    00208   uint pos = 0;
    00209   HDC dc;
    00210   HGDIOBJ oldfont;
    00211   byte *buf;
    00212   DWORD dw;
    00213   uint16 format, count, stringOffset, platformId, encodingId, languageId, nameId, length, offset;
    00214
    00215   HFONT font = CreateFontIndirect(&logfont->elfLogFont);
    00216   if (font == NULL) goto err1;
    00217
    00218   dc = GetDC(NULL);
    00219   oldfont = SelectObject(dc, font);
    00220   dw = GetFontData(dc, 'eman', 0, NULL, 0);
    00221   if (dw == GDI_ERROR) goto err2;
    00222
    00223   buf = MallocT<byte>(dw);
    00224   dw = GetFontData(dc, 'eman', 0, buf, dw);
    00225   if (dw == GDI_ERROR) goto err3;
    00226
    00227   format = buf[pos++] << 8;
    00228   format += buf[pos++];
    00229   assert(format == 0);
    00230   count = buf[pos++] << 8;
    00231   count += buf[pos++];
    00232   stringOffset = buf[pos++] << 8;
    00233   stringOffset += buf[pos++];
    00234   for (uint i = 0; i < count; i++) {
    00235     platformId = buf[pos++] << 8;
    00236     platformId += buf[pos++];
    00237     encodingId = buf[pos++] << 8;
    00238     encodingId += buf[pos++];
    00239     languageId = buf[pos++] << 8;
    00240     languageId += buf[pos++];
    00241     nameId = buf[pos++] << 8;
    00242     nameId += buf[pos++];
    00243     if (nameId != 1) {
    00244       pos += 4; // skip length and offset
    00245       continue;
    00246     }
    00247     length = buf[pos++] << 8;
    00248     length += buf[pos++];
    00249     offset = buf[pos++] << 8;
    00250     offset += buf[pos++];
    00251
    00252     /* Don't buffer overflow */
    00253     length = min(length, MAX_PATH - 1);
    00254     for (uint j = 0; j < length; j++) font_name[j] = buf[stringOffset + offset + j];
    00255     font_name[length] = '\0';
    00256
    00257     if ((platformId == 1 && languageId == 0) ||      // Macintosh English
    00258       (platformId == 3 && languageId == 0x0409)) { // Microsoft English (US)
    00259       ret_font_name = font_name;
    00260       break;
    00261     }
    00262   }
    00263
    00264 err3:
    00265   free(buf);
    00266 err2:
    00267   SelectObject(dc, oldfont);
    00268   ReleaseDC(NULL, dc);
    00269 err1:
    00270   DeleteObject(font);
    00271
    00272   return ret_font_name == NULL ? WIDE_TO_MB((const TCHAR*)logfont->elfFullName) : ret_font_name;
    00273 }
    00274
    00275 struct EFCParam {
    00276   FreeTypeSettings *settings;
    00277   LOCALESIGNATURE  locale;
    00278 };
    00279
    00280 static int CALLBACK EnumFontCallback(const ENUMLOGFONTEX *logfont, const NEWTEXTMETRICEX *metric, DWORD type, LPARAM lParam)
    00281 {
    00282   EFCParam *info = (EFCParam *)lParam;
    00283
    00284   /* Only use TrueType fonts */
    00285   if (!(type & TRUETYPE_FONTTYPE)) return 1;
    00286   /* Don't use SYMBOL fonts */
    00287   if (logfont->elfLogFont.lfCharSet == SYMBOL_CHARSET) return 1;
    00288
    00289   /* The font has to have at least one of the supported locales to be usable. */
    00290   if ((metric->ntmFontSig.fsCsb[0] & info->locale.lsCsbSupported[0]) == 0 && (metric->ntmFontSig.fsCsb[1] & info->locale.lsCsbSupported[1]) == 0) {
    00291     /* On win9x metric->ntmFontSig seems to contain garbage. */
    00292     FONTSIGNATURE fs;
    00293     memset(&fs, 0, sizeof(fs));
    00294     HFONT font = CreateFontIndirect(&logfont->elfLogFont);
    00295     if (font != NULL) {
    00296       HDC dc = GetDC(NULL);
    00297       HGDIOBJ oldfont = SelectObject(dc, font);
    00298       GetTextCharsetInfo(dc, &fs, 0);
    00299       SelectObject(dc, oldfont);
    00300       ReleaseDC(NULL, dc);
    00301       DeleteObject(font);
    00302     }
    00303     if ((fs.fsCsb[0] & info->locale.lsCsbSupported[0]) == 0 && (fs.fsCsb[1] & info->locale.lsCsbSupported[1]) == 0) return 1;
    00304   }
    00305
    00306   const char *english_name = GetEnglishFontName(logfont);
    00307   const char *font_name = WIDE_TO_MB((const TCHAR*)logfont->elfFullName);
    00308   DEBUG(freetype, 1, "Fallback font: %s (%s)", font_name, english_name);
    00309
    00310   strecpy(info->settings->small_font,  font_name, lastof(info->settings->small_font));
    00311   strecpy(info->settings->medium_font, font_name, lastof(info->settings->medium_font));
    00312   strecpy(info->settings->large_font,  font_name, lastof(info->settings->large_font));
    00313
    00314   /* Add english name after font name */
    00315   strecpy(info->settings->small_font + strlen(info->settings->small_font) + 1, english_name, lastof(info->settings->small_font));
    00316   strecpy(info->settings->medium_font + strlen(info->settings->medium_font) + 1, english_name, lastof(info->settings->medium_font));
    00317   strecpy(info->settings->large_font + strlen(info->settings->large_font) + 1, english_name, lastof(info->settings->large_font));
    00318   return 0; // stop enumerating
    00319 }
    00320
    00321 bool SetFallbackFont(FreeTypeSettings *settings, const char *language_isocode, int winlangid)
    00322 {
    00323   EFCParam langInfo;
    00324   if (GetLocaleInfo(MAKELCID(winlangid, SORT_DEFAULT), LOCALE_FONTSIGNATURE, (LPTSTR)&langInfo.locale, sizeof(langInfo.locale) / sizeof(TCHAR)) == 0) {
    00325     /* Invalid langid or some other mysterious error, can't determine fallback font. */
    00326     DEBUG(freetype, 1, "Can't get locale info for fallback font (langid=0x%x)", winlangid);
    00327     return false;
    00328   }
    00329   langInfo.settings = settings;
    00330
    00331   LOGFONT font;
    00332   /* Enumerate all fonts. */
    00333   font.lfCharSet = DEFAULT_CHARSET;
    00334   font.lfFaceName[0] = '\0';
    00335   font.lfPitchAndFamily = 0;
    00336
    00337   HDC dc = GetDC(NULL);
    00338   int ret = EnumFontFamiliesEx(dc, &font, (FONTENUMPROC)&EnumFontCallback, (LPARAM)&langInfo, 0);
    00339   ReleaseDC(NULL, dc);
    00340   return ret == 0;
    00341 }
    00342
    00343 #elif defined(WITH_FONTCONFIG)
    00344 static FT_Error GetFontByFaceName(const char *font_name, FT_Face *face)
    00345 {
    00346   FT_Error err = FT_Err_Cannot_Open_Resource;
    00347
    00348   if (!FcInit()) {
    00349     ShowInfoF("Unable to load font configuration");
    00350   } else {
    00351     FcPattern *match;
    00352     FcPattern *pat;
    00353     FcFontSet *fs;
    00354     FcResult  result;
    00355     char *font_style;
    00356     char *font_family;
    00357
    00358     /* Split & strip the font's style */
    00359     font_family = strdup(font_name);
    00360     font_style = strchr(font_family, ',');
    00361     if (font_style != NULL) {
    00362       font_style[0] = '\0';
    00363       font_style++;
    00364       while (*font_style == ' ' || *font_style == '\t') font_style++;
    00365     }
    00366
    00367     /* Resolve the name and populate the information structure */
    00368     pat = FcNameParse((FcChar8*)font_family);
    00369     if (font_style != NULL) FcPatternAddString(pat, FC_STYLE, (FcChar8*)font_style);
    00370     FcConfigSubstitute(0, pat, FcMatchPattern);
    00371     FcDefaultSubstitute(pat);
    00372     fs = FcFontSetCreate();
    00373     match = FcFontMatch(0, pat, &result);
    00374
    00375     if (fs != NULL && match != NULL) {
    00376       int i;
    00377       FcChar8 *family;
    00378       FcChar8 *style;
    00379       FcChar8 *file;
    00380       FcFontSetAdd(fs, match);
    00381
    00382       for (i = 0; err != FT_Err_Ok && i < fs->nfont; i++) {
    00383         /* Try the new filename */
    00384         if (FcPatternGetString(fs->fonts[i], FC_FILE,   0, &file)   == FcResultMatch &&
    00385             FcPatternGetString(fs->fonts[i], FC_FAMILY, 0, &family) == FcResultMatch &&
    00386             FcPatternGetString(fs->fonts[i], FC_STYLE,  0, &style)  == FcResultMatch) {
    00387
    00388           /* The correct style? */
    00389           if (font_style != NULL && strcasecmp(font_style, (char*)style) != 0) continue;
    00390
    00391           /* Font config takes the best shot, which, if the family name is spelled
    00392            * wrongly a 'random' font, so check whether the family name is the
    00393            * same as the supplied name */
    00394           if (strcasecmp(font_family, (char*)family) == 0) {
    00395             err = FT_New_Face(_library, (char *)file, 0, face);
    00396           }
    00397         }
    00398       }
    00399     }
    00400
    00401     free(font_family);
    00402     FcPatternDestroy(pat);
    00403     FcFontSetDestroy(fs);
    00404     FcFini();
    00405   }
    00406
    00407   return err;
    00408 }
    00409
    00410 bool SetFallbackFont(FreeTypeSettings *settings, const char *language_isocode, int winlangid)
    00411 {
    00412   if (!FcInit()) return false;
    00413
    00414   bool ret = false;
    00415
    00416   /* Fontconfig doesn't handle full language isocodes, only the part
    00417    * before the _ of e.g. en_GB is used, so "remove" everything after
    00418    * the _. */
    00419   char lang[16];
    00420   strecpy(lang, language_isocode, lastof(lang));
    00421   char *split = strchr(lang, '_');
    00422   if (split != NULL) *split = '\0';
    00423
    00424   FcPattern *pat;
    00425   FcPattern *match;
    00426   FcResult result;
    00427   FcChar8 *file;
    00428   FcFontSet *fs;
    00429   FcValue val;
    00430   val.type = FcTypeString;
    00431   val.u.s = (FcChar8*)lang;
    00432
    00433   /* First create a pattern to match the wanted language */
    00434   pat = FcPatternCreate();
    00435   /* And fill it with the language and other defaults */
    00436   if (pat == NULL ||
    00437       !FcPatternAdd(pat, "lang", val, false) ||
    00438       !FcConfigSubstitute(0, pat, FcMatchPattern)) {
    00439     goto error_pattern;
    00440   }
    00441
    00442   FcDefaultSubstitute(pat);
    00443
    00444   /* Then create a font set and match that */
    00445   match = FcFontMatch(0, pat, &result);
    00446
    00447   if (match == NULL) {
    00448     goto error_pattern;
    00449   }
    00450
    00451   /* Find all fonts that do match */
    00452   fs = FcFontSetCreate();
    00453   FcFontSetAdd(fs, match);
    00454
    00455   /* And take the first, if it exists */
    00456   if (fs->nfont <= 0 || FcPatternGetString(fs->fonts[0], FC_FILE, 0, &file)) {
    00457     goto error_fontset;
    00458   }
    00459
    00460   strecpy(settings->small_font,  (const char*)file, lastof(settings->small_font));
    00461   strecpy(settings->medium_font, (const char*)file, lastof(settings->medium_font));
    00462   strecpy(settings->large_font,  (const char*)file, lastof(settings->large_font));
    00463
    00464   ret = true;
    00465
    00466 error_fontset:
    00467   FcFontSetDestroy(fs);
    00468 error_pattern:
    00469   if (pat != NULL) FcPatternDestroy(pat);
    00470   FcFini();
    00471   return ret;
    00472 }
    00473
    00474 #else /* without WITH_FONTCONFIG */
    00475 FT_Error GetFontByFaceName(const char *font_name, FT_Face *face) {return FT_Err_Cannot_Open_Resource;}
    00476 bool SetFallbackFont(FreeTypeSettings *settings, const char *language_isocode, int winlangid) { return false; }
    00477 #endif /* WITH_FONTCONFIG */
    00478
    00485 static void LoadFreeTypeFont(const char *font_name, FT_Face *face, const char *type)
    00486 {
    00487   FT_Error error;
    00488
    00489   if (StrEmpty(font_name)) return;
    00490
    00491   error = FT_New_Face(_library, font_name, 0, face);
    00492
    00493   if (error != FT_Err_Ok) error = GetFontByFaceName(font_name, face);
    00494
    00495   if (error == FT_Err_Ok) {
    00496     DEBUG(freetype, 2, "Requested '%s', using '%s %s'", font_name, (*face)->family_name, (*face)->style_name);
    00497
    00498     /* Attempt to select the unicode character map */
    00499     error = FT_Select_Charmap(*face, ft_encoding_unicode);
    00500     if (error == FT_Err_Ok) return; // Success
    00501
    00502     if (error == FT_Err_Invalid_CharMap_Handle) {
    00503       /* Try to pick a different character map instead. We default to
    00504        * the first map, but platform_id 0 encoding_id 0 should also
    00505        * be unicode (strange system...) */
    00506       FT_CharMap found = (*face)->charmaps[0];
    00507       int i;
    00508
    00509       for (i = 0; i < (*face)->num_charmaps; i++) {
    00510         FT_CharMap charmap = (*face)->charmaps[i];
    00511         if (charmap->platform_id == 0 && charmap->encoding_id == 0) {
    00512           found = charmap;
    00513         }
    00514       }
    00515
    00516       if (found != NULL) {
    00517         error = FT_Set_Charmap(*face, found);
    00518         if (error == FT_Err_Ok) return;
    00519       }
    00520     }
    00521   }
    00522
    00523   FT_Done_Face(*face);
    00524   *face = NULL;
    00525
    00526   ShowInfoF("Unable to use '%s' for %s font, FreeType reported error 0x%X, using sprite font instead", font_name, type, error);
    00527 }
    00528
    00529
    00530 void InitFreeType()
    00531 {
    00532   if (StrEmpty(_freetype.small_font) && StrEmpty(_freetype.medium_font) && StrEmpty(_freetype.large_font)) {
    00533     DEBUG(freetype, 1, "No font faces specified, using sprite fonts instead");
    00534     return;
    00535   }
    00536
    00537   if (FT_Init_FreeType(&_library) != FT_Err_Ok) {
    00538     ShowInfoF("Unable to initialize FreeType, using sprite fonts instead");
    00539     return;
    00540   }
    00541
    00542   DEBUG(freetype, 2, "Initialized");
    00543
    00544   /* Load each font */
    00545   LoadFreeTypeFont(_freetype.small_font,  &_face_small,  "small");
    00546   LoadFreeTypeFont(_freetype.medium_font, &_face_medium, "medium");
    00547   LoadFreeTypeFont(_freetype.large_font,  &_face_large,  "large");
    00548
    00549   /* Set each font size */
    00550   if (_face_small  != NULL) FT_Set_Pixel_Sizes(_face_small,  0, _freetype.small_size);
    00551   if (_face_medium != NULL) FT_Set_Pixel_Sizes(_face_medium, 0, _freetype.medium_size);
    00552   if (_face_large  != NULL) FT_Set_Pixel_Sizes(_face_large,  0, _freetype.large_size);
    00553 }
    00554
    00555 static void ResetGlyphCache();
    00556
    00561 static void UnloadFace(FT_Face *face)
    00562 {
    00563   if (*face == NULL) return;
    00564
    00565   FT_Done_Face(*face);
    00566   *face = NULL;
    00567 }
    00568
    00572 void UninitFreeType()
    00573 {
    00574   ResetGlyphCache();
    00575
    00576   UnloadFace(&_face_small);
    00577   UnloadFace(&_face_medium);
    00578   UnloadFace(&_face_large);
    00579
    00580   FT_Done_FreeType(_library);
    00581   _library = NULL;
    00582 }
    00583
    00584
    00585 static FT_Face GetFontFace(FontSize size)
    00586 {
    00587   switch (size) {
    00588     default: NOT_REACHED();
    00589     case FS_NORMAL: return _face_medium;
    00590     case FS_SMALL:  return _face_small;
    00591     case FS_LARGE:  return _face_large;
    00592   }
    00593 }
    00594
    00595
    00596 struct GlyphEntry {
    00597   Sprite *sprite;
    00598   byte width;
    00599 };
    00600
    00601
    00602 /* The glyph cache. This is structured to reduce memory consumption.
    00603  * 1) There is a 'segment' table for each font size.
    00604  * 2) Each segment table is a discrete block of characters.
    00605  * 3) Each block contains 256 (aligned) characters sequential characters.
    00606  *
    00607  * The cache is accessed in the following way:
    00608  * For character 0x0041  ('A'): _glyph_ptr[FS_NORMAL][0x00][0x41]
    00609  * For character 0x20AC (Euro): _glyph_ptr[FS_NORMAL][0x20][0xAC]
    00610  *
    00611  * Currently only 256 segments are allocated, "limiting" us to 65536 characters.
    00612  * This can be simply changed in the two functions Get & SetGlyphPtr.
    00613  */
    00614 static GlyphEntry **_glyph_ptr[FS_END];
    00615
    00617 static void ResetGlyphCache()
    00618 {
    00619   for (int i = 0; i < FS_END; i++) {
    00620     if (_glyph_ptr[i] == NULL) continue;
    00621
    00622     for (int j = 0; j < 256; j++) {
    00623       if (_glyph_ptr[i][j] == NULL) continue;
    00624
    00625       for (int k = 0; k < 256; k++) {
    00626         if (_glyph_ptr[i][j][k].sprite == NULL) continue;
    00627         free(_glyph_ptr[i][j][k].sprite);
    00628       }
    00629
    00630       free(_glyph_ptr[i][j]);
    00631     }
    00632
    00633     free(_glyph_ptr[i]);
    00634     _glyph_ptr[i] = NULL;
    00635   }
    00636 }
    00637
    00638 static GlyphEntry *GetGlyphPtr(FontSize size, WChar key)
    00639 {
    00640   if (_glyph_ptr[size] == NULL) return NULL;
    00641   if (_glyph_ptr[size][GB(key, 8, 8)] == NULL) return NULL;
    00642   return &_glyph_ptr[size][GB(key, 8, 8)][GB(key, 0, 8)];
    00643 }
    00644
    00645
    00646 static void SetGlyphPtr(FontSize size, WChar key, const GlyphEntry *glyph)
    00647 {
    00648   if (_glyph_ptr[size] == NULL) {
    00649     DEBUG(freetype, 3, "Allocating root glyph cache for size %u", size);
    00650     _glyph_ptr[size] = CallocT<GlyphEntry*>(256);
    00651   }
    00652
    00653   if (_glyph_ptr[size][GB(key, 8, 8)] == NULL) {
    00654     DEBUG(freetype, 3, "Allocating glyph cache for range 0x%02X00, size %u", GB(key, 8, 8), size);
    00655     _glyph_ptr[size][GB(key, 8, 8)] = CallocT<GlyphEntry>(256);
    00656   }
    00657
    00658   DEBUG(freetype, 4, "Set glyph for unicode character 0x%04X, size %u", key, size);
    00659   _glyph_ptr[size][GB(key, 8, 8)][GB(key, 0, 8)].sprite = glyph->sprite;
    00660   _glyph_ptr[size][GB(key, 8, 8)][GB(key, 0, 8)].width  = glyph->width;
    00661 }
    00662
    00663 void *AllocateFont(size_t size)
    00664 {
    00665   return MallocT<byte>(size);
    00666 }
    00667
    00668
    00669 /* Check if a glyph should be rendered with antialiasing */
    00670 static bool GetFontAAState(FontSize size)
    00671 {
    00672   /* AA is only supported for 32 bpp */
    00673   if (BlitterFactoryBase::GetCurrentBlitter()->GetScreenDepth() != 32) return false;
    00674
    00675   switch (size) {
    00676     default: NOT_REACHED();
    00677     case FS_NORMAL: return _freetype.medium_aa;
    00678     case FS_SMALL:  return _freetype.small_aa;
    00679     case FS_LARGE:  return _freetype.large_aa;
    00680   }
    00681 }
    00682
    00683
    00684 const Sprite *GetGlyph(FontSize size, WChar key)
    00685 {
    00686   FT_Face face = GetFontFace(size);
    00687   FT_GlyphSlot slot;
    00688   GlyphEntry new_glyph;
    00689   GlyphEntry *glyph;
    00690   SpriteLoader::Sprite sprite;
    00691   int width;
    00692   int height;
    00693   int x;
    00694   int y;
    00695   int y_adj;
    00696
    00697   assert(IsPrintable(key));
    00698
    00699   /* Bail out if no face loaded, or for our special characters */
    00700   if (face == NULL || (key >= SCC_SPRITE_START && key <= SCC_SPRITE_END)) {
    00701     SpriteID sprite = GetUnicodeGlyph(size, key);
    00702     if (sprite == 0) sprite = GetUnicodeGlyph(size, '?');
    00703     return GetSprite(sprite, ST_FONT);
    00704   }
    00705
    00706   /* Check for the glyph in our cache */
    00707   glyph = GetGlyphPtr(size, key);
    00708   if (glyph != NULL && glyph->sprite != NULL) return glyph->sprite;
    00709
    00710   slot = face->glyph;
    00711
    00712   bool aa = GetFontAAState(size);
    00713
    00714   FT_Load_Char(face, key, FT_LOAD_DEFAULT);
    00715   FT_Render_Glyph(face->glyph, aa ? FT_RENDER_MODE_NORMAL : FT_RENDER_MODE_MONO);
    00716
    00717   /* Despite requesting a normal glyph, FreeType may have returned a bitmap */
    00718   aa = (slot->bitmap.pixel_mode == FT_PIXEL_MODE_GRAY);
    00719
    00720   /* Add 1 pixel for the shadow on the medium font. Our sprite must be at least 1x1 pixel */
    00721   width  = max(1, slot->bitmap.width + (size == FS_NORMAL));
    00722   height = max(1, slot->bitmap.rows  + (size == FS_NORMAL));
    00723
    00724   /* FreeType has rendered the glyph, now we allocate a sprite and copy the image into it */
    00725   sprite.AllocateData(width * height);
    00726   sprite.width = width;
    00727   sprite.height = height;
    00728   sprite.x_offs = slot->bitmap_left;
    00729   /* XXX 2 should be determined somehow... it's right for the normal face */
    00730   y_adj = (size == FS_NORMAL) ? 2 : 0;
    00731   sprite.y_offs = GetCharacterHeight(size) - slot->bitmap_top - y_adj;
    00732
    00733   /* Draw shadow for medium size */
    00734   if (size == FS_NORMAL) {
    00735     for (y = 0; y < slot->bitmap.rows; y++) {
    00736       for (x = 0; x < slot->bitmap.width; x++) {
    00737         if (aa ? (slot->bitmap.buffer[x + y * slot->bitmap.pitch] > 0) : HasBit(slot->bitmap.buffer[(x / 8) + y * slot->bitmap.pitch], 7 - (x % 8))) {
    00738           sprite.data[1 + x + (1 + y) * sprite.width].m = SHADOW_COLOUR;
    00739           sprite.data[1 + x + (1 + y) * sprite.width].a = aa ? slot->bitmap.buffer[x + y * slot->bitmap.pitch] : 0xFF;
    00740         }
    00741       }
    00742     }
    00743   }
    00744
    00745   for (y = 0; y < slot->bitmap.rows; y++) {
    00746     for (x = 0; x < slot->bitmap.width; x++) {
    00747       if (aa ? (slot->bitmap.buffer[x + y * slot->bitmap.pitch] > 0) : HasBit(slot->bitmap.buffer[(x / 8) + y * slot->bitmap.pitch], 7 - (x % 8))) {
    00748         sprite.data[x + y * sprite.width].m = FACE_COLOUR;
    00749         sprite.data[x + y * sprite.width].a = aa ? slot->bitmap.buffer[x + y * slot->bitmap.pitch] : 0xFF;
    00750       }
    00751     }
    00752   }
    00753
    00754   new_glyph.sprite = BlitterFactoryBase::GetCurrentBlitter()->Encode(&sprite, AllocateFont);
    00755   new_glyph.width  = (slot->advance.x >> 6) + (size != FS_NORMAL);
    00756
    00757   SetGlyphPtr(size, key, &new_glyph);
    00758
    00759   return new_glyph.sprite;
    00760 }
    00761
    00762
    00763 uint GetGlyphWidth(FontSize size, WChar key)
    00764 {
    00765   FT_Face face = GetFontFace(size);
    00766   GlyphEntry *glyph;
    00767
    00768   if (face == NULL || (key >= SCC_SPRITE_START && key <= SCC_SPRITE_END)) {
    00769     SpriteID sprite = GetUnicodeGlyph(size, key);
    00770     if (sprite == 0) sprite = GetUnicodeGlyph(size, '?');
    00771     return SpriteExists(sprite) ? GetSprite(sprite, ST_FONT)->width + (size != FS_NORMAL) : 0;
    00772   }
    00773
    00774   glyph = GetGlyphPtr(size, key);
    00775   if (glyph == NULL || glyph->sprite == NULL) {
    00776     GetGlyph(size, key);
    00777     glyph = GetGlyphPtr(size, key);
    00778   }
    00779
    00780   return glyph->width;
    00781 }
    00782
    00783
    00784 #endif /* WITH_FREETYPE */
    00785
    00786 /* Sprite based glyph mapping */
    00787
    00788 #include "table/unicode.h"
    00789
    00790 static SpriteID **_unicode_glyph_map[FS_END];
    00791
    00792
    00794 static SpriteID GetFontBase(FontSize size)
    00795 {
    00796   switch (size) {
    00797     default: NOT_REACHED();
    00798     case FS_NORMAL: return SPR_ASCII_SPACE;
    00799     case FS_SMALL:  return SPR_ASCII_SPACE_SMALL;
    00800     case FS_LARGE:  return SPR_ASCII_SPACE_BIG;
    00801   }
    00802 }
    00803
    00804
    00805 SpriteID GetUnicodeGlyph(FontSize size, uint32 key)
    00806 {
    00807   if (_unicode_glyph_map[size][GB(key, 8, 8)] == NULL) return 0;
    00808   return _unicode_glyph_map[size][GB(key, 8, 8)][GB(key, 0, 8)];
    00809 }
    00810
    00811
    00812 void SetUnicodeGlyph(FontSize size, uint32 key, SpriteID sprite)
    00813 {
    00814   if (_unicode_glyph_map[size] == NULL) _unicode_glyph_map[size] = CallocT<SpriteID*>(256);
    00815   if (_unicode_glyph_map[size][GB(key, 8, 8)] == NULL) _unicode_glyph_map[size][GB(key, 8, 8)] = CallocT<SpriteID>(256);
    00816   _unicode_glyph_map[size][GB(key, 8, 8)][GB(key, 0, 8)] = sprite;
    00817 }
    00818
    00819
    00820 void InitializeUnicodeGlyphMap()
    00821 {
    00822   for (FontSize size = FS_NORMAL; size != FS_END; size++) {
    00823     /* Clear out existing glyph map if it exists */
    00824     if (_unicode_glyph_map[size] != NULL) {
    00825       for (uint i = 0; i < 256; i++) {
    00826         if (_unicode_glyph_map[size][i] != NULL) free(_unicode_glyph_map[size][i]);
    00827       }
    00828       free(_unicode_glyph_map[size]);
    00829       _unicode_glyph_map[size] = NULL;
    00830     }
    00831
    00832     SpriteID base = GetFontBase(size);
    00833
    00834     for (uint i = ASCII_LETTERSTART; i < 256; i++) {
    00835       SpriteID sprite = base + i - ASCII_LETTERSTART;
    00836       if (!SpriteExists(sprite)) continue;
    00837       SetUnicodeGlyph(size, i, sprite);
    00838       SetUnicodeGlyph(size, i + SCC_SPRITE_START, sprite);
    00839     }
    00840
    00841     for (uint i = 0; i < lengthof(_default_unicode_map); i++) {
    00842       byte key = _default_unicode_map[i].key;
    00843       if (key == CLRA || key == CLRL) {
    00844         /* Clear the glyph. This happens if the glyph at this code point
    00845          * is non-standard and should be accessed by an SCC_xxx enum
    00846          * entry only. */
    00847         if (key == CLRA || size == FS_LARGE) {
    00848           SetUnicodeGlyph(size, _default_unicode_map[i].code, 0);
    00849         }
    00850       } else {
    00851         SpriteID sprite = base + key - ASCII_LETTERSTART;
    00852         SetUnicodeGlyph(size, _default_unicode_map[i].code, sprite);
    00853       }
    00854     }
    00855   }
    00856 }