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authorrubidium <rubidium@openttd.org>2013-06-23 15:20:23 +0000
committerrubidium <rubidium@openttd.org>2013-06-23 15:20:23 +0000
commit13c450a66bef275a88d687e6f500425b91126f8f (patch)
tree9c7dbdcd1d602a1974571f808b89b43d8bbadec0 /src/fontdetection.cpp
parent930c19dae292d5863b201ded98444c9fb2e7b20a (diff)
downloadopenttd-13c450a66bef275a88d687e6f500425b91126f8f.tar.xz
(svn r25436) -Codechange: split the font detection code out of the font caching code
Diffstat (limited to 'src/fontdetection.cpp')
-rw-r--r--src/fontdetection.cpp774
1 files changed, 774 insertions, 0 deletions
diff --git a/src/fontdetection.cpp b/src/fontdetection.cpp
new file mode 100644
index 000000000..1e2373fb6
--- /dev/null
+++ b/src/fontdetection.cpp
@@ -0,0 +1,774 @@
+/* $Id$ */
+
+/*
+ * This file is part of OpenTTD.
+ * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
+ * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/** @file fontdetection.cpp Detection of the right font. */
+
+#include "stdafx.h"
+#include "debug.h"
+#include "fontdetection.h"
+#include "string_func.h"
+#include "strings_func.h"
+
+extern FT_Library _library;
+
+/**
+ * Get the font loaded into a Freetype face by using a font-name.
+ * If no appropriate font is found, the function returns an error
+ */
+
+/* ========================================================================================
+ * Windows support
+ * ======================================================================================== */
+
+#ifdef WIN32
+#include <windows.h>
+#include <shlobj.h> /* SHGetFolderPath */
+#include "os/windows/win32.h"
+
+/**
+ * Get the short DOS 8.3 format for paths.
+ * FreeType doesn't support Unicode filenames and Windows' fopen (as used
+ * by FreeType) doesn't support UTF-8 filenames. So we have to convert the
+ * filename into something that isn't UTF-8 but represents the Unicode file
+ * name. This is the short DOS 8.3 format. This does not contain any
+ * characters that fopen doesn't support.
+ * @param long_path the path in UTF-8.
+ * @return the short path in ANSI (ASCII).
+ */
+char *GetShortPath(const char *long_path)
+{
+ static char short_path[MAX_PATH];
+#ifdef UNICODE
+ /* The non-unicode GetShortPath doesn't support UTF-8...,
+ * so convert the path to wide chars, then get the short
+ * path and convert it back again. */
+ wchar_t long_path_w[MAX_PATH];
+ MultiByteToWideChar(CP_UTF8, 0, long_path, -1, long_path_w, MAX_PATH);
+
+ wchar_t short_path_w[MAX_PATH];
+ GetShortPathNameW(long_path_w, short_path_w, MAX_PATH);
+
+ WideCharToMultiByte(CP_ACP, 0, short_path_w, -1, short_path, MAX_PATH, NULL, NULL);
+#else
+ /* Technically not needed, but do it for consistency. */
+ GetShortPathNameA(long_path, short_path, MAX_PATH);
+#endif
+ return short_path;
+}
+
+/* Get the font file to be loaded into Freetype by looping the registry
+ * location where windows lists all installed fonts. Not very nice, will
+ * surely break if the registry path changes, but it works. Much better
+ * solution would be to use CreateFont, and extract the font data from it
+ * by GetFontData. The problem with this is that the font file needs to be
+ * kept in memory then until the font is no longer needed. This could mean
+ * an additional memory usage of 30MB (just for fonts!) when using an eastern
+ * font for all font sizes */
+#define FONT_DIR_NT "SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Fonts"
+#define FONT_DIR_9X "SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Fonts"
+FT_Error GetFontByFaceName(const char *font_name, FT_Face *face)
+{
+ FT_Error err = FT_Err_Cannot_Open_Resource;
+ HKEY hKey;
+ LONG ret;
+ TCHAR vbuffer[MAX_PATH], dbuffer[256];
+ TCHAR *font_namep;
+ char *font_path;
+ uint index;
+
+ /* On windows NT (2000, NT3.5, XP, etc.) the fonts are stored in the
+ * "Windows NT" key, on Windows 9x in the Windows key. To save us having
+ * to retrieve the windows version, we'll just query both */
+ ret = RegOpenKeyEx(HKEY_LOCAL_MACHINE, _T(FONT_DIR_NT), 0, KEY_READ, &hKey);
+ if (ret != ERROR_SUCCESS) ret = RegOpenKeyEx(HKEY_LOCAL_MACHINE, _T(FONT_DIR_9X), 0, KEY_READ, &hKey);
+
+ if (ret != ERROR_SUCCESS) {
+ DEBUG(freetype, 0, "Cannot open registry key HKLM\\SOFTWARE\\Microsoft\\Windows (NT)\\CurrentVersion\\Fonts");
+ return err;
+ }
+
+ /* For Unicode we need some conversion between widechar and
+ * normal char to match the data returned by RegEnumValue,
+ * otherwise just use parameter */
+#if defined(UNICODE)
+ font_namep = MallocT<TCHAR>(MAX_PATH);
+ MB_TO_WIDE_BUFFER(font_name, font_namep, MAX_PATH * sizeof(TCHAR));
+#else
+ font_namep = const_cast<char *>(font_name); // only cast because in unicode pointer is not const
+#endif
+
+ for (index = 0;; index++) {
+ TCHAR *s;
+ DWORD vbuflen = lengthof(vbuffer);
+ DWORD dbuflen = lengthof(dbuffer);
+
+ ret = RegEnumValue(hKey, index, vbuffer, &vbuflen, NULL, NULL, (byte*)dbuffer, &dbuflen);
+ if (ret != ERROR_SUCCESS) goto registry_no_font_found;
+
+ /* The font names in the registry are of the following 3 forms:
+ * - ADMUI3.fon
+ * - Book Antiqua Bold (TrueType)
+ * - Batang & BatangChe & Gungsuh & GungsuhChe (TrueType)
+ * We will strip the font-type '()' if any and work with the font name
+ * itself, which must match exactly; if...
+ * TTC files, font files which contain more than one font are separated
+ * by '&'. Our best bet will be to do substr match for the fontname
+ * and then let FreeType figure out which index to load */
+ s = _tcschr(vbuffer, _T('('));
+ if (s != NULL) s[-1] = '\0';
+
+ if (_tcschr(vbuffer, _T('&')) == NULL) {
+ if (_tcsicmp(vbuffer, font_namep) == 0) break;
+ } else {
+ if (_tcsstr(vbuffer, font_namep) != NULL) break;
+ }
+ }
+
+ if (!SUCCEEDED(OTTDSHGetFolderPath(NULL, CSIDL_FONTS, NULL, SHGFP_TYPE_CURRENT, vbuffer))) {
+ DEBUG(freetype, 0, "SHGetFolderPath cannot return fonts directory");
+ goto folder_error;
+ }
+
+ /* Some fonts are contained in .ttc files, TrueType Collection fonts. These
+ * contain multiple fonts inside this single file. GetFontData however
+ * returns the whole file, so we need to check each font inside to get the
+ * proper font.
+ * Also note that FreeType does not support UNICODE filenames! */
+#if defined(UNICODE)
+ /* We need a cast here back from wide because FreeType doesn't support
+ * widechar filenames. Just use the buffer we allocated before for the
+ * font_name search */
+ font_path = (char*)font_namep;
+ WIDE_TO_MB_BUFFER(vbuffer, font_path, MAX_PATH * sizeof(TCHAR));
+#else
+ font_path = vbuffer;
+#endif
+
+ ttd_strlcat(font_path, "\\", MAX_PATH * sizeof(TCHAR));
+ ttd_strlcat(font_path, WIDE_TO_MB(dbuffer), MAX_PATH * sizeof(TCHAR));
+
+ /* Convert the path into something that FreeType understands */
+ font_path = GetShortPath(font_path);
+
+ index = 0;
+ do {
+ err = FT_New_Face(_library, font_path, index, face);
+ if (err != FT_Err_Ok) break;
+
+ if (strncasecmp(font_name, (*face)->family_name, strlen((*face)->family_name)) == 0) break;
+ /* Try english name if font name failed */
+ if (strncasecmp(font_name + strlen(font_name) + 1, (*face)->family_name, strlen((*face)->family_name)) == 0) break;
+ err = FT_Err_Cannot_Open_Resource;
+
+ } while ((FT_Long)++index != (*face)->num_faces);
+
+
+folder_error:
+registry_no_font_found:
+#if defined(UNICODE)
+ free(font_namep);
+#endif
+ RegCloseKey(hKey);
+ return err;
+}
+
+/**
+ * Fonts can have localised names and when the system locale is the same as
+ * one of those localised names Windows will always return that localised name
+ * instead of allowing to get the non-localised (English US) name of the font.
+ * This will later on give problems as freetype uses the non-localised name of
+ * the font and we need to compare based on that name.
+ * Windows furthermore DOES NOT have an API to get the non-localised name nor
+ * can we override the system locale. This means that we have to actually read
+ * the font itself to gather the font name we want.
+ * Based on: http://blogs.msdn.com/michkap/archive/2006/02/13/530814.aspx
+ * @param logfont the font information to get the english name of.
+ * @return the English name (if it could be found).
+ */
+static const char *GetEnglishFontName(const ENUMLOGFONTEX *logfont)
+{
+ static char font_name[MAX_PATH];
+ const char *ret_font_name = NULL;
+ uint pos = 0;
+ HDC dc;
+ HGDIOBJ oldfont;
+ byte *buf;
+ DWORD dw;
+ uint16 format, count, stringOffset, platformId, encodingId, languageId, nameId, length, offset;
+
+ HFONT font = CreateFontIndirect(&logfont->elfLogFont);
+ if (font == NULL) goto err1;
+
+ dc = GetDC(NULL);
+ oldfont = SelectObject(dc, font);
+ dw = GetFontData(dc, 'eman', 0, NULL, 0);
+ if (dw == GDI_ERROR) goto err2;
+
+ buf = MallocT<byte>(dw);
+ dw = GetFontData(dc, 'eman', 0, buf, dw);
+ if (dw == GDI_ERROR) goto err3;
+
+ format = buf[pos++] << 8;
+ format += buf[pos++];
+ assert(format == 0);
+ count = buf[pos++] << 8;
+ count += buf[pos++];
+ stringOffset = buf[pos++] << 8;
+ stringOffset += buf[pos++];
+ for (uint i = 0; i < count; i++) {
+ platformId = buf[pos++] << 8;
+ platformId += buf[pos++];
+ encodingId = buf[pos++] << 8;
+ encodingId += buf[pos++];
+ languageId = buf[pos++] << 8;
+ languageId += buf[pos++];
+ nameId = buf[pos++] << 8;
+ nameId += buf[pos++];
+ if (nameId != 1) {
+ pos += 4; // skip length and offset
+ continue;
+ }
+ length = buf[pos++] << 8;
+ length += buf[pos++];
+ offset = buf[pos++] << 8;
+ offset += buf[pos++];
+
+ /* Don't buffer overflow */
+ length = min(length, MAX_PATH - 1);
+ for (uint j = 0; j < length; j++) font_name[j] = buf[stringOffset + offset + j];
+ font_name[length] = '\0';
+
+ if ((platformId == 1 && languageId == 0) || // Macintosh English
+ (platformId == 3 && languageId == 0x0409)) { // Microsoft English (US)
+ ret_font_name = font_name;
+ break;
+ }
+ }
+
+err3:
+ free(buf);
+err2:
+ SelectObject(dc, oldfont);
+ ReleaseDC(NULL, dc);
+ DeleteObject(font);
+err1:
+ return ret_font_name == NULL ? WIDE_TO_MB((const TCHAR*)logfont->elfFullName) : ret_font_name;
+}
+
+class FontList {
+protected:
+ TCHAR **fonts;
+ uint items;
+ uint capacity;
+
+public:
+ FontList() : fonts(NULL), items(0), capacity(0) { };
+
+ ~FontList() {
+ if (this->fonts == NULL) return;
+
+ for (uint i = 0; i < this->items; i++) {
+ free(this->fonts[i]);
+ }
+
+ free(this->fonts);
+ }
+
+ bool Add(const TCHAR *font) {
+ for (uint i = 0; i < this->items; i++) {
+ if (_tcscmp(this->fonts[i], font) == 0) return false;
+ }
+
+ if (this->items == this->capacity) {
+ this->capacity += 10;
+ this->fonts = ReallocT(this->fonts, this->capacity);
+ }
+
+ this->fonts[this->items++] = _tcsdup(font);
+
+ return true;
+ }
+};
+
+struct EFCParam {
+ FreeTypeSettings *settings;
+ LOCALESIGNATURE locale;
+ MissingGlyphSearcher *callback;
+ FontList fonts;
+};
+
+static int CALLBACK EnumFontCallback(const ENUMLOGFONTEX *logfont, const NEWTEXTMETRICEX *metric, DWORD type, LPARAM lParam)
+{
+ EFCParam *info = (EFCParam *)lParam;
+
+ /* Skip duplicates */
+ if (!info->fonts.Add((const TCHAR*)logfont->elfFullName)) return 1;
+ /* Only use TrueType fonts */
+ if (!(type & TRUETYPE_FONTTYPE)) return 1;
+ /* Don't use SYMBOL fonts */
+ if (logfont->elfLogFont.lfCharSet == SYMBOL_CHARSET) return 1;
+ /* Use monospaced fonts when asked for it. */
+ if (info->callback->Monospace() && (logfont->elfLogFont.lfPitchAndFamily & (FF_MODERN | FIXED_PITCH)) != (FF_MODERN | FIXED_PITCH)) return 1;
+
+ /* The font has to have at least one of the supported locales to be usable. */
+ if ((metric->ntmFontSig.fsCsb[0] & info->locale.lsCsbSupported[0]) == 0 && (metric->ntmFontSig.fsCsb[1] & info->locale.lsCsbSupported[1]) == 0) {
+ /* On win9x metric->ntmFontSig seems to contain garbage. */
+ FONTSIGNATURE fs;
+ memset(&fs, 0, sizeof(fs));
+ HFONT font = CreateFontIndirect(&logfont->elfLogFont);
+ if (font != NULL) {
+ HDC dc = GetDC(NULL);
+ HGDIOBJ oldfont = SelectObject(dc, font);
+ GetTextCharsetInfo(dc, &fs, 0);
+ SelectObject(dc, oldfont);
+ ReleaseDC(NULL, dc);
+ DeleteObject(font);
+ }
+ if ((fs.fsCsb[0] & info->locale.lsCsbSupported[0]) == 0 && (fs.fsCsb[1] & info->locale.lsCsbSupported[1]) == 0) return 1;
+ }
+
+ char font_name[MAX_PATH];
+#if defined(UNICODE)
+ WIDE_TO_MB_BUFFER((const TCHAR*)logfont->elfFullName, font_name, lengthof(font_name));
+#else
+ strecpy(font_name, (const TCHAR*)logfont->elfFullName, lastof(font_name));
+#endif
+
+ /* Add english name after font name */
+ const char *english_name = GetEnglishFontName(logfont);
+ strecpy(font_name + strlen(font_name) + 1, english_name, lastof(font_name));
+
+ /* Check whether we can actually load the font. */
+ bool ft_init = _library != NULL;
+ bool found = false;
+ FT_Face face;
+ /* Init FreeType if needed. */
+ if ((ft_init || FT_Init_FreeType(&_library) == FT_Err_Ok) && GetFontByFaceName(font_name, &face) == FT_Err_Ok) {
+ FT_Done_Face(face);
+ found = true;
+ }
+ if (!ft_init) {
+ /* Uninit FreeType if we did the init. */
+ FT_Done_FreeType(_library);
+ _library = NULL;
+ }
+
+ if (!found) return 1;
+
+ info->callback->SetFontNames(info->settings, font_name);
+ if (info->callback->FindMissingGlyphs(NULL)) return 1;
+ DEBUG(freetype, 1, "Fallback font: %s (%s)", font_name, english_name);
+ return 0; // stop enumerating
+}
+
+bool SetFallbackFont(FreeTypeSettings *settings, const char *language_isocode, int winlangid, MissingGlyphSearcher *callback)
+{
+ DEBUG(freetype, 1, "Trying fallback fonts");
+ EFCParam langInfo;
+ if (GetLocaleInfo(MAKELCID(winlangid, SORT_DEFAULT), LOCALE_FONTSIGNATURE, (LPTSTR)&langInfo.locale, sizeof(langInfo.locale) / sizeof(TCHAR)) == 0) {
+ /* Invalid langid or some other mysterious error, can't determine fallback font. */
+ DEBUG(freetype, 1, "Can't get locale info for fallback font (langid=0x%x)", winlangid);
+ return false;
+ }
+ langInfo.settings = settings;
+ langInfo.callback = callback;
+
+ LOGFONT font;
+ /* Enumerate all fonts. */
+ font.lfCharSet = DEFAULT_CHARSET;
+ font.lfFaceName[0] = '\0';
+ font.lfPitchAndFamily = 0;
+
+ HDC dc = GetDC(NULL);
+ int ret = EnumFontFamiliesEx(dc, &font, (FONTENUMPROC)&EnumFontCallback, (LPARAM)&langInfo, 0);
+ ReleaseDC(NULL, dc);
+ return ret == 0;
+}
+
+#elif defined(__APPLE__) /* end ifdef Win32 */
+/* ========================================================================================
+ * OSX support
+ * ======================================================================================== */
+
+#include "os/macosx/macos.h"
+
+FT_Error GetFontByFaceName(const char *font_name, FT_Face *face)
+{
+ FT_Error err = FT_Err_Cannot_Open_Resource;
+
+ /* Get font reference from name. */
+ CFStringRef name = CFStringCreateWithCString(kCFAllocatorDefault, font_name, kCFStringEncodingUTF8);
+ ATSFontRef font = ATSFontFindFromName(name, kATSOptionFlagsDefault);
+ CFRelease(name);
+ if (font == kInvalidFont) return err;
+
+ /* Get a file system reference for the font. */
+ FSRef ref;
+ OSStatus os_err = -1;
+#if (MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_5)
+ if (MacOSVersionIsAtLeast(10, 5, 0)) {
+ os_err = ATSFontGetFileReference(font, &ref);
+ } else
+#endif
+ {
+#if (MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_5) && !__LP64__
+ /* This type was introduced with the 10.5 SDK. */
+#if (MAC_OS_X_VERSION_MAX_ALLOWED < MAC_OS_X_VERSION_10_5)
+ #define ATSFSSpec FSSpec
+#endif
+ FSSpec spec;
+ os_err = ATSFontGetFileSpecification(font, (ATSFSSpec *)&spec);
+ if (os_err == noErr) os_err = FSpMakeFSRef(&spec, &ref);
+#endif
+ }
+
+ if (os_err == noErr) {
+ /* Get unix path for file. */
+ UInt8 file_path[PATH_MAX];
+ if (FSRefMakePath(&ref, file_path, sizeof(file_path)) == noErr) {
+ DEBUG(freetype, 3, "Font path for %s: %s", font_name, file_path);
+ err = FT_New_Face(_library, (const char *)file_path, 0, face);
+ }
+ }
+
+ return err;
+}
+
+bool SetFallbackFont(FreeTypeSettings *settings, const char *language_isocode, int winlangid, MissingGlyphSearcher *callback)
+{
+ const char *str;
+ bool result = false;
+
+ callback->FindMissingGlyphs(&str);
+
+#if (MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_5)
+ if (MacOSVersionIsAtLeast(10, 5, 0)) {
+ /* Determine fallback font using CoreText. This uses the language isocode
+ * to find a suitable font. CoreText is available from 10.5 onwards. */
+ char lang[16];
+ if (strcmp(language_isocode, "zh_TW") == 0) {
+ /* Traditional Chinese */
+ strecpy(lang, "zh-Hant", lastof(lang));
+ } else if (strcmp(language_isocode, "zh_CN") == 0) {
+ /* Simplified Chinese */
+ strecpy(lang, "zh-Hans", lastof(lang));
+ } else if (strncmp(language_isocode, "ur", 2) == 0) {
+ /* The urdu alphabet is variant of persian. As OS X has no default
+ * font that advertises an urdu language code, search for persian
+ * support instead. */
+ strecpy(lang, "fa", lastof(lang));
+ } else {
+ /* Just copy the first part of the isocode. */
+ strecpy(lang, language_isocode, lastof(lang));
+ char *sep = strchr(lang, '_');
+ if (sep != NULL) *sep = '\0';
+ }
+
+ CFStringRef lang_code;
+ lang_code = CFStringCreateWithCString(kCFAllocatorDefault, lang, kCFStringEncodingUTF8);
+
+ /* Create a font iterator and iterate over all fonts that
+ * are available to the application. */
+ ATSFontIterator itr;
+ ATSFontRef font;
+ ATSFontIteratorCreate(kATSFontContextLocal, NULL, NULL, kATSOptionFlagsUnRestrictedScope, &itr);
+ while (!result && ATSFontIteratorNext(itr, &font) == noErr) {
+ /* Get CoreText font handle. */
+ CTFontRef font_ref = CTFontCreateWithPlatformFont(font, 0.0, NULL, NULL);
+ CFArrayRef langs = CTFontCopySupportedLanguages(font_ref);
+ if (langs != NULL) {
+ /* Font has a list of supported languages. */
+ for (CFIndex i = 0; i < CFArrayGetCount(langs); i++) {
+ CFStringRef lang = (CFStringRef)CFArrayGetValueAtIndex(langs, i);
+ if (CFStringCompare(lang, lang_code, kCFCompareAnchored) == kCFCompareEqualTo) {
+ /* Lang code is supported by font, get full font name. */
+ CFStringRef font_name = CTFontCopyFullName(font_ref);
+ char name[128];
+ CFStringGetCString(font_name, name, lengthof(name), kCFStringEncodingUTF8);
+ CFRelease(font_name);
+ /* Skip some inappropriate or ugly looking fonts that have better alternatives. */
+ if (strncmp(name, "Courier", 7) == 0 || strncmp(name, "Apple Symbols", 13) == 0 ||
+ strncmp(name, ".Aqua", 5) == 0 || strncmp(name, "LastResort", 10) == 0 ||
+ strncmp(name, "GB18030 Bitmap", 14) == 0) continue;
+
+ /* Save result. */
+ callback->SetFontNames(settings, name);
+ DEBUG(freetype, 2, "CT-Font for %s: %s", language_isocode, name);
+ result = true;
+ break;
+ }
+ }
+ CFRelease(langs);
+ }
+ CFRelease(font_ref);
+ }
+ ATSFontIteratorRelease(&itr);
+ CFRelease(lang_code);
+ } else
+#endif
+ {
+#if (MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_5) && !__LP64__
+ /* Determine fallback font using ATSUI. This uses a string sample with
+ * missing characters. This is not failure-proof, but a better way like
+ * using the isocode as in the CoreText code path is not available.
+ * ATSUI was deprecated with 10.6 and is only partially available in
+ * 64-bit mode. */
+
+ /* Remove all control characters in the range from SCC_CONTROL_START to
+ * SCC_CONTROL_END as well as all ASCII < 0x20 from the string as it will
+ * mess with the automatic font detection */
+ char buff[256]; // This length is enough to find a suitable replacement font
+ strecpy(buff, str, lastof(buff));
+ str_validate(buff, lastof(buff), SVS_ALLOW_NEWLINE);
+
+ /* Extract a UniChar representation of the sample string. */
+ CFStringRef cf_str = CFStringCreateWithCString(kCFAllocatorDefault, buff, kCFStringEncodingUTF8);
+ if (cf_str == NULL) {
+ /* Something went wrong. Corrupt/invalid sample string? */
+ return false;
+ }
+ CFIndex str_len = CFStringGetLength(cf_str);
+ UniChar string[str_len];
+ CFStringGetCharacters(cf_str, CFRangeMake(0, str_len), string);
+
+ /* Create a default text style with the default font. */
+ ATSUStyle style;
+ ATSUCreateStyle(&style);
+
+ /* Create a text layout object from the sample string using the text style. */
+ UniCharCount run_len = kATSUToTextEnd;
+ ATSUTextLayout text_layout;
+ ATSUCreateTextLayoutWithTextPtr(string, kATSUFromTextBeginning, kATSUToTextEnd, str_len, 1, &run_len, &style, &text_layout);
+
+ /* Try to match a font for the sample text. ATSUMatchFontsToText stops after
+ * it finds the first continuous character run not renderable with the currently
+ * selected font starting at offset. The matching needs to be repeated until
+ * the end of the string is reached to make sure the fallback font matches for
+ * all characters in the string and not only the first run. */
+ UniCharArrayOffset offset = kATSUFromTextBeginning;
+ OSStatus os_err;
+ do {
+ ATSUFontID font;
+ UniCharCount run_len;
+ os_err = ATSUMatchFontsToText(text_layout, offset, kATSUToTextEnd, &font, &offset, &run_len);
+ if (os_err == kATSUFontsMatched) {
+ /* Found a better fallback font. Update the text layout
+ * object with the new font. */
+ ATSUAttributeTag tag = kATSUFontTag;
+ ByteCount size = sizeof(font);
+ ATSUAttributeValuePtr val = &font;
+ ATSUSetAttributes(style, 1, &tag, &size, &val);
+ offset += run_len;
+ }
+ /* Exit if the end of the string is reached or some other error occurred. */
+ } while (os_err == kATSUFontsMatched && offset < (UniCharArrayOffset)str_len);
+
+ if (os_err == noErr || os_err == kATSUFontsMatched) {
+ /* ATSUMatchFontsToText exited normally. Extract font
+ * out of the text layout object. */
+ ATSUFontID font;
+ ByteCount act_len;
+ ATSUGetAttribute(style, kATSUFontTag, sizeof(font), &font, &act_len);
+
+ /* Get unique font name. The result is not a c-string, we have
+ * to leave space for a \0 and terminate it ourselves. */
+ char name[128];
+ ATSUFindFontName(font, kFontUniqueName, kFontNoPlatformCode, kFontNoScriptCode, kFontNoLanguageCode, 127, name, &act_len, NULL);
+ name[act_len > 127 ? 127 : act_len] = '\0';
+
+ /* Save Result. */
+ callback->SetFontNames(settings, name);
+ DEBUG(freetype, 2, "ATSUI-Font for %s: %s", language_isocode, name);
+ result = true;
+ }
+
+ ATSUDisposeTextLayout(text_layout);
+ ATSUDisposeStyle(style);
+ CFRelease(cf_str);
+#endif
+ }
+
+ if (result && strncmp(settings->medium_font, "Geeza Pro", 9) == 0) {
+ /* The font 'Geeza Pro' is often found for arabic characters, but
+ * it has the 'tiny' problem of not having any latin characters.
+ * 'Arial Unicode MS' on the other hand has arabic and latin glyphs,
+ * but seems to 'forget' to inform the OS about this fact. Manually
+ * substitute the latter for the former if it is loadable. */
+ bool ft_init = _library != NULL;
+ FT_Face face;
+ /* Init FreeType if needed. */
+ if ((ft_init || FT_Init_FreeType(&_library) == FT_Err_Ok) && GetFontByFaceName("Arial Unicode MS", &face) == FT_Err_Ok) {
+ FT_Done_Face(face);
+ callback->SetFontNames(settings, "Arial Unicode MS");
+ DEBUG(freetype, 1, "Replacing font 'Geeza Pro' with 'Arial Unicode MS'");
+ }
+ if (!ft_init) {
+ /* Uninit FreeType if we did the init. */
+ FT_Done_FreeType(_library);
+ _library = NULL;
+ }
+ }
+
+ callback->FindMissingGlyphs(NULL);
+ return result;
+}
+
+#elif defined(WITH_FONTCONFIG) /* end ifdef __APPLE__ */
+
+#include <fontconfig/fontconfig.h>
+
+/* ========================================================================================
+ * FontConfig (unix) support
+ * ======================================================================================== */
+FT_Error GetFontByFaceName(const char *font_name, FT_Face *face)
+{
+ FT_Error err = FT_Err_Cannot_Open_Resource;
+
+ if (!FcInit()) {
+ ShowInfoF("Unable to load font configuration");
+ } else {
+ FcPattern *match;
+ FcPattern *pat;
+ FcFontSet *fs;
+ FcResult result;
+ char *font_style;
+ char *font_family;
+
+ /* Split & strip the font's style */
+ font_family = strdup(font_name);
+ font_style = strchr(font_family, ',');
+ if (font_style != NULL) {
+ font_style[0] = '\0';
+ font_style++;
+ while (*font_style == ' ' || *font_style == '\t') font_style++;
+ }
+
+ /* Resolve the name and populate the information structure */
+ pat = FcNameParse((FcChar8*)font_family);
+ if (font_style != NULL) FcPatternAddString(pat, FC_STYLE, (FcChar8*)font_style);
+ FcConfigSubstitute(0, pat, FcMatchPattern);
+ FcDefaultSubstitute(pat);
+ fs = FcFontSetCreate();
+ match = FcFontMatch(0, pat, &result);
+
+ if (fs != NULL && match != NULL) {
+ int i;
+ FcChar8 *family;
+ FcChar8 *style;
+ FcChar8 *file;
+ FcFontSetAdd(fs, match);
+
+ for (i = 0; err != FT_Err_Ok && i < fs->nfont; i++) {
+ /* Try the new filename */
+ if (FcPatternGetString(fs->fonts[i], FC_FILE, 0, &file) == FcResultMatch &&
+ FcPatternGetString(fs->fonts[i], FC_FAMILY, 0, &family) == FcResultMatch &&
+ FcPatternGetString(fs->fonts[i], FC_STYLE, 0, &style) == FcResultMatch) {
+
+ /* The correct style? */
+ if (font_style != NULL && strcasecmp(font_style, (char*)style) != 0) continue;
+
+ /* Font config takes the best shot, which, if the family name is spelled
+ * wrongly a 'random' font, so check whether the family name is the
+ * same as the supplied name */
+ if (strcasecmp(font_family, (char*)family) == 0) {
+ err = FT_New_Face(_library, (char *)file, 0, face);
+ }
+ }
+ }
+ }
+
+ free(font_family);
+ FcPatternDestroy(pat);
+ FcFontSetDestroy(fs);
+ FcFini();
+ }
+
+ return err;
+}
+
+bool SetFallbackFont(FreeTypeSettings *settings, const char *language_isocode, int winlangid, MissingGlyphSearcher *callback)
+{
+ if (!FcInit()) return false;
+
+ bool ret = false;
+
+ /* Fontconfig doesn't handle full language isocodes, only the part
+ * before the _ of e.g. en_GB is used, so "remove" everything after
+ * the _. */
+ char lang[16];
+ seprintf(lang, lastof(lang), ":lang=%s", language_isocode);
+ char *split = strchr(lang, '_');
+ if (split != NULL) *split = '\0';
+
+ /* First create a pattern to match the wanted language. */
+ FcPattern *pat = FcNameParse((FcChar8*)lang);
+ /* We only want to know the filename. */
+ FcObjectSet *os = FcObjectSetBuild(FC_FILE, FC_SPACING, FC_SLANT, FC_WEIGHT, NULL);
+ /* Get the list of filenames matching the wanted language. */
+ FcFontSet *fs = FcFontList(NULL, pat, os);
+
+ /* We don't need these anymore. */
+ FcObjectSetDestroy(os);
+ FcPatternDestroy(pat);
+
+ if (fs != NULL) {
+ int best_weight = -1;
+ const char *best_font = NULL;
+
+ for (int i = 0; i < fs->nfont; i++) {
+ FcPattern *font = fs->fonts[i];
+
+ FcChar8 *file = NULL;
+ FcResult res = FcPatternGetString(font, FC_FILE, 0, &file);
+ if (res != FcResultMatch || file == NULL) {
+ continue;
+ }
+
+ /* Get a font with the right spacing .*/
+ int value = 0;
+ FcPatternGetInteger(font, FC_SPACING, 0, &value);
+ if (callback->Monospace() != (value == FC_MONO) && value != FC_DUAL) continue;
+
+ /* Do not use those that explicitly say they're slanted. */
+ FcPatternGetInteger(font, FC_SLANT, 0, &value);
+ if (value != 0) continue;
+
+ /* We want the fatter font as they look better at small sizes. */
+ FcPatternGetInteger(font, FC_WEIGHT, 0, &value);
+ if (value <= best_weight) continue;
+
+ callback->SetFontNames(settings, (const char*)file);
+
+ bool missing = callback->FindMissingGlyphs(NULL);
+ DEBUG(freetype, 1, "Font \"%s\" misses%s glyphs", file, missing ? "" : " no");
+
+ if (!missing) {
+ best_weight = value;
+ best_font = (const char *)file;
+ }
+ }
+
+ if (best_font != NULL) {
+ ret = true;
+ callback->SetFontNames(settings, best_font);
+ InitFreeType(callback->Monospace());
+ }
+
+ /* Clean up the list of filenames. */
+ FcFontSetDestroy(fs);
+ }
+
+ FcFini();
+ return ret;
+}
+
+#else /* without WITH_FONTCONFIG */
+FT_Error GetFontByFaceName(const char *font_name, FT_Face *face) {return FT_Err_Cannot_Open_Resource;}
+bool SetFallbackFont(FreeTypeSettings *settings, const char *language_isocode, int winlangid, MissingGlyphSearcher *callback) { return false; }
+#endif /* WITH_FONTCONFIG */