jdk/src/windows/native/sun/font/fontpath.c
changeset 2 90ce3da70b43
child 1716 461122becab9
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/windows/native/sun/font/fontpath.c	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,696 @@
+/*
+ * Copyright 1998-2007 Sun Microsystems, Inc.  All Rights Reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Sun designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Sun in the LICENSE file that accompanied this code.
+ *
+ * This code 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
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+#include <windows.h>
+#include <stdio.h>
+
+#include <jni.h>
+#include <jni_util.h>
+#include <sun_font_FontManager.h>
+
+#define BSIZE (max(512, MAX_PATH+1))
+
+
+JNIEXPORT jstring JNICALL Java_sun_font_FontManager_getFontPath(JNIEnv *env, jclass obj, jboolean noType1)
+{
+    char windir[BSIZE];
+    char sysdir[BSIZE];
+    char fontpath[BSIZE*2];
+    char *end;
+
+    /* Locate fonts directories relative to the Windows System directory.
+     * If Windows System location is different than the user's window
+     * directory location, as in a shared Windows installation,
+     * return both locations as potential font directories
+     */
+    GetSystemDirectory(sysdir, BSIZE);
+    end = strrchr(sysdir,'\\');
+    if (end && (stricmp(end,"\\System") || stricmp(end,"\\System32"))) {
+        *end = 0;
+         strcat(sysdir, "\\Fonts");
+    }
+
+    GetWindowsDirectory(windir, BSIZE);
+    if (strlen(windir) > BSIZE-7) {
+        *windir = 0;
+    } else {
+        strcat(windir, "\\Fonts");
+    }
+
+    strcpy(fontpath,sysdir);
+    if (stricmp(sysdir,windir)) {
+        strcat(fontpath,";");
+        strcat(fontpath,windir);
+    }
+
+    return JNU_NewStringPlatform(env, fontpath);
+}
+
+/* This isn't used on windows, the implementation is added in case shared
+ * code accidentally calls this method to prevent an UnsatisfiedLinkError
+ */
+JNIEXPORT void JNICALL Java_sun_font_FontManager_setNativeFontPath
+(JNIEnv *env, jclass obj, jstring theString)
+{
+    return;
+}
+
+/* The code below is used to obtain information from the windows font APIS
+ * and registry on which fonts are available and what font files hold those
+ * fonts. The results are used to speed font lookup.
+ */
+
+typedef struct GdiFontMapInfo {
+    JNIEnv *env;
+    jstring family;
+    jobject fontToFamilyMap;
+    jobject familyToFontListMap;
+    jobject list;
+    jmethodID putMID;
+    jmethodID containsKeyMID;
+    jclass arrayListClass;
+    jmethodID arrayListCtr;
+    jmethodID addMID;
+    jmethodID toLowerCaseMID;
+    jobject locale;
+} GdiFontMapInfo;
+
+/* IS_NT means NT or later OSes which support Unicode.
+ * We have to painfully deal with the ASCII and non-ASCII case we
+ * we really want to get the font names as unicode wherever possible.
+ * UNICODE_OS is 0 to mean uninitialised, 1 to mean not a unicode OS,
+ * 2 to mean a unicode OS.
+ */
+
+#define UC_UNKNOWN 0
+#define UC_NO     1
+#define UC_YES    2
+static int UNICODE_OS = UC_UNKNOWN;
+static int GetOSVersion () {
+    OSVERSIONINFO vinfo;
+    vinfo.dwOSVersionInfoSize = sizeof(vinfo);
+    GetVersionEx(&vinfo);
+    if ((int)vinfo.dwMajorVersion > 4) {
+        UNICODE_OS = UC_YES;
+    } else if ((int)vinfo.dwMajorVersion < 4) {
+        UNICODE_OS = UC_NO;
+    } else {
+        if ((int)vinfo.dwPlatformId == VER_PLATFORM_WIN32_WINDOWS) {
+            UNICODE_OS = UC_NO;
+        } else {
+            UNICODE_OS = UC_YES;
+        }
+    }
+    return UNICODE_OS;
+}
+
+#define IS_NT ((UNICODE_OS == UC_UNKNOWN) \
+   ? (GetOSVersion() == UC_YES) : (UNICODE_OS == UC_YES))
+
+/* NT is W2K & XP. WIN is Win9x */
+static const char FONTKEY_NT[] =
+    "Software\\Microsoft\\Windows NT\\CurrentVersion\\Fonts";
+static const char FONTKEY_WIN[] =
+    "Software\\Microsoft\\Windows\\CurrentVersion\\Fonts";
+
+/* Callback for call to EnumFontFamiliesEx in the EnumFamilyNames function.
+ * Expects to be called once for each face name in the family specified
+ * in the call. We extract the full name for the font which is expected
+ * to be in the "system encoding" and create canonical and lower case
+ * Java strings for the name which are added to the maps. The lower case
+ * name is used as key to the family name value in the font to family map,
+ * the canonical name is one of the"list" of members of the family.
+ */
+static int CALLBACK EnumFontFacesInFamilyProcA(
+  ENUMLOGFONTEXA *lpelfe,
+  NEWTEXTMETRICEX *lpntme,
+  int FontType,
+  LPARAM lParam )
+{
+    GdiFontMapInfo *fmi = (GdiFontMapInfo*)lParam;
+    JNIEnv *env = fmi->env;
+    jstring fullname, fullnameLC;
+
+    if (FontType != TRUETYPE_FONTTYPE) {
+        return 1;
+    }
+
+    /* printf("FULL=%s\n",lpelfe->elfFullName);fflush(stdout);  */
+
+    fullname = JNU_NewStringPlatform(env, lpelfe->elfFullName);
+    fullnameLC = (*env)->CallObjectMethod(env, fullname,
+                                          fmi->toLowerCaseMID, fmi->locale);
+    (*env)->CallObjectMethod(env, fmi->list, fmi->addMID, fullname);
+    (*env)->CallObjectMethod(env, fmi->fontToFamilyMap,
+                             fmi->putMID, fullnameLC, fmi->family);
+    return 1;
+}
+
+typedef struct CheckFamilyInfo {
+  wchar_t *family;
+  wchar_t* fullName;
+  int isDifferent;
+} CheckFamilyInfo;
+
+static int CALLBACK CheckFontFamilyProcW(
+  ENUMLOGFONTEXW *lpelfe,
+  NEWTEXTMETRICEX *lpntme,
+  int FontType,
+  LPARAM lParam)
+{
+    CheckFamilyInfo *info = (CheckFamilyInfo*)lParam;
+    info->isDifferent = wcscmp(lpelfe->elfLogFont.lfFaceName, info->family);
+
+/*     if (!info->isDifferent) { */
+/*         wprintf(LFor font %s expected family=%s instead got %s\n", */
+/*                 lpelfe->elfFullName, */
+/*                 info->family, */
+/*                 lpelfe->elfLogFont.lfFaceName); */
+/*         fflush(stdout); */
+/*     } */
+    return 0;
+}
+
+static int DifferentFamily(wchar_t *family, wchar_t* fullName) {
+    LOGFONTW lfw;
+    CheckFamilyInfo info;
+
+    /* If fullName can't be stored in the struct, assume correct family */
+    if (wcslen((LPWSTR)fullName) >= LF_FACESIZE) {
+        return 0;
+    }
+
+    memset(&info, 0, sizeof(CheckFamilyInfo));
+    info.family = family;
+    info.fullName = fullName;
+    info.isDifferent = 0;
+
+    memset(&lfw, 0, sizeof(lfw));
+    wcscpy(lfw.lfFaceName, fullName);
+    lfw.lfCharSet = DEFAULT_CHARSET;
+    EnumFontFamiliesExW(GetDC(NULL), &lfw,
+                        (FONTENUMPROCW)CheckFontFamilyProcW,
+                        (LPARAM)(&info), 0L);
+
+    return info.isDifferent;
+}
+
+static int CALLBACK EnumFontFacesInFamilyProcW(
+  ENUMLOGFONTEXW *lpelfe,
+  NEWTEXTMETRICEX *lpntme,
+  int FontType,
+  LPARAM lParam)
+{
+    GdiFontMapInfo *fmi = (GdiFontMapInfo*)lParam;
+    JNIEnv *env = fmi->env;
+    jstring fullname, fullnameLC;
+
+    if (FontType != TRUETYPE_FONTTYPE) {
+        return 1;
+    }
+
+    /* Windows has font aliases and so may enumerate fonts from
+     * the aliased family if any actual font of that family is installed.
+     * To protect against it ignore fonts which aren't enumerated under
+     * their true family.
+     */
+    if (DifferentFamily(lpelfe->elfLogFont.lfFaceName,
+                        lpelfe->elfFullName))  {
+      return 1;
+    }
+
+    fullname = (*env)->NewString(env, lpelfe->elfFullName,
+                                 wcslen((LPWSTR)lpelfe->elfFullName));
+    fullnameLC = (*env)->CallObjectMethod(env, fullname,
+                                          fmi->toLowerCaseMID, fmi->locale);
+    (*env)->CallObjectMethod(env, fmi->list, fmi->addMID, fullname);
+    (*env)->CallObjectMethod(env, fmi->fontToFamilyMap,
+                             fmi->putMID, fullnameLC, fmi->family);
+    return 1;
+}
+
+/* Callback for EnumFontFamiliesEx in populateFontFileNameMap.
+ * Expects to be called for every charset of every font family.
+ * If this is the first time we have been called for this family,
+ * add a new mapping to the familyToFontListMap from this family to a
+ * list of its members. To populate that list, further enumerate all faces
+ * in this family for the matched charset. This assumes that all fonts
+ * in a family support the same charset, which is a fairly safe assumption
+ * and saves time as the call we make here to EnumFontFamiliesEx will
+ * enumerate the members of this family just once each.
+ * Because we set fmi->list to be the newly created list the call back
+ * can safely add to that list without a search.
+ */
+static int CALLBACK EnumFamilyNamesA(
+  ENUMLOGFONTEXA *lpelfe,    /* pointer to logical-font data */
+  NEWTEXTMETRICEX *lpntme,   /* pointer to physical-font data */
+  int FontType,              /* type of font */
+  LPARAM lParam)             /* application-defined data */
+{
+    GdiFontMapInfo *fmi = (GdiFontMapInfo*)lParam;
+    JNIEnv *env = fmi->env;
+    jstring familyLC;
+    LOGFONTA lfa;
+
+    if (FontType != TRUETYPE_FONTTYPE) {
+        return 1;
+    }
+
+    /* Windows lists fonts which have a vmtx (vertical metrics) table twice.
+     * Once using their normal name, and again preceded by '@'. These appear
+     * in font lists in some windows apps, such as wordpad. We don't want
+     * these so we skip any font where the first character is '@'
+     */
+    if (lpelfe->elfLogFont.lfFaceName[0] == '@') {
+        return 1;
+    }
+    fmi->family = JNU_NewStringPlatform(env,lpelfe->elfLogFont.lfFaceName);
+    familyLC = (*env)->CallObjectMethod(env, fmi->family,
+                                        fmi->toLowerCaseMID, fmi->locale);
+    /* check if already seen this family with a different charset */
+    if ((*env)->CallBooleanMethod(env,fmi->familyToFontListMap,
+                                  fmi->containsKeyMID, familyLC)) {
+        return 1;
+    }
+    fmi->list = (*env)->NewObject(env,
+                                  fmi->arrayListClass, fmi->arrayListCtr, 4);
+
+    (*env)->CallObjectMethod(env, fmi->familyToFontListMap,
+                             fmi->putMID, familyLC, fmi->list);
+
+/*  printf("FAMILY=%s\n", lpelfe->elfLogFont.lfFaceName);fflush(stdout); */
+
+    memset(&lfa, 0, sizeof(lfa));
+    strcpy(lfa.lfFaceName, lpelfe->elfLogFont.lfFaceName);
+    lfa.lfCharSet = lpelfe->elfLogFont.lfCharSet;
+    EnumFontFamiliesExA(GetDC(NULL), &lfa,
+                        (FONTENUMPROCA)EnumFontFacesInFamilyProcA,
+                        lParam, 0L);
+    return 1;
+}
+
+static int CALLBACK EnumFamilyNamesW(
+  ENUMLOGFONTEXW *lpelfe,    /* pointer to logical-font data */
+  NEWTEXTMETRICEX *lpntme,  /* pointer to physical-font data */
+  int FontType,             /* type of font */
+  LPARAM lParam )           /* application-defined data */
+{
+    GdiFontMapInfo *fmi = (GdiFontMapInfo*)lParam;
+    JNIEnv *env = fmi->env;
+    jstring familyLC;
+    int slen;
+    LOGFONTW lfw;
+
+    if (FontType != TRUETYPE_FONTTYPE) {
+        return 1;
+    }
+/*     wprintf(L"FAMILY=%s charset=%d FULL=%s\n", */
+/*          lpelfe->elfLogFont.lfFaceName, */
+/*          lpelfe->elfLogFont.lfCharSet, */
+/*          lpelfe->elfFullName); */
+/*     fflush(stdout); */
+
+    /* Windows lists fonts which have a vmtx (vertical metrics) table twice.
+     * Once using their normal name, and again preceded by '@'. These appear
+     * in font lists in some windows apps, such as wordpad. We don't want
+     * these so we skip any font where the first character is '@'
+     */
+    if (lpelfe->elfLogFont.lfFaceName[0] == L'@') {
+            return 1;
+    }
+    slen = wcslen(lpelfe->elfLogFont.lfFaceName);
+    fmi->family = (*env)->NewString(env,lpelfe->elfLogFont.lfFaceName, slen);
+    familyLC = (*env)->CallObjectMethod(env, fmi->family,
+                                        fmi->toLowerCaseMID, fmi->locale);
+    /* check if already seen this family with a different charset */
+    if ((*env)->CallBooleanMethod(env,fmi->familyToFontListMap,
+                                  fmi->containsKeyMID, familyLC)) {
+        return 1;
+    }
+    fmi->list = (*env)->NewObject(env,
+                                  fmi->arrayListClass, fmi->arrayListCtr, 4);
+
+    (*env)->CallObjectMethod(env, fmi->familyToFontListMap,
+                             fmi->putMID, familyLC, fmi->list);
+
+    memset(&lfw, 0, sizeof(lfw));
+    wcscpy(lfw.lfFaceName, lpelfe->elfLogFont.lfFaceName);
+    lfw.lfCharSet = lpelfe->elfLogFont.lfCharSet;
+    EnumFontFamiliesExW(GetDC(NULL), &lfw,
+                        (FONTENUMPROCW)EnumFontFacesInFamilyProcW,
+                        lParam, 0L);
+    return 1;
+}
+
+
+/* It looks like TrueType fonts have " (TrueType)" tacked on the end of their
+ * name, so we can try to use that to distinguish TT from other fonts.
+ * However if a program "installed" a font in the registry the key may
+ * not include that. We could also try to "pass" fonts which have no "(..)"
+ * at the end. But that turns out to pass a few .FON files that MS supply.
+ * If there's no parenthesised type string, we could next try to infer
+ * the file type from the file name extension. Since the MS entries that
+ * have no type string are very few, and have odd names like "MS-DOS CP 437"
+ * and would never return a Java Font anyway its currently OK to put these
+ * in the font map, although clearly the returned names must never percolate
+ * up into a list of available fonts returned to the application.
+ * Additionally for TTC font files the key looks like
+ * Font 1 & Font 2 (TrueType)
+ * or sometimes even :
+ * Font 1 & Font 2 & Font 3 (TrueType)
+ * Also if a Font has a name for this locale that name also
+ * exists in the registry using the appropriate platform encoding.
+ * What do we do then?
+ */
+
+/* static const wchar_t W_TTSUFFIX[] = L" (TrueType)"; */
+/* static const char C_TTSUFFIX[] = " (TrueType)"; */
+/* static int TTSLEN = 11;  hard-coded - be careful */
+static BOOL RegistryToBaseTTNameA(LPCSTR name) {
+    static const char TTSUFFIX[] = " (TrueType)";
+    int TTSLEN = strlen(TTSUFFIX);
+    char *match;
+
+    int len = strlen(name);
+    if (len == 0) {
+        return FALSE;
+    }
+    if (name[len-1] != ')') {
+        return FALSE;
+    }
+    if (len <= TTSLEN) {
+        return FALSE;
+    }
+    match = strstr(name, TTSUFFIX);
+    if ((match != NULL) && (match == name+(len-TTSLEN))) {
+        match[0] = '\0'; /* truncate name */
+        return TRUE;
+    } else {
+        return FALSE;
+    }
+}
+
+static BOOL RegistryToBaseTTNameW(LPWSTR name) {
+    static const wchar_t TTSUFFIX[] = L" (TrueType)";
+    int TTSLEN = wcslen(TTSUFFIX);
+    wchar_t *match;
+
+    int len = wcslen(name);
+    if (len == 0) {
+        return FALSE;
+    }
+    if (name[len-1] != L')') {
+        return FALSE;
+    }
+    if (len <= TTSLEN) {
+        return FALSE;
+    }
+    match = wcsstr(name, TTSUFFIX);
+    if ((match != NULL) && (match == name+(len-TTSLEN))) {
+        match[0] = L'\0'; /* truncate name */
+        return TRUE;
+    } else {
+        return FALSE;
+    }
+}
+
+static void registerFontA(GdiFontMapInfo *fmi, jobject fontToFileMap,
+                          LPCSTR name, LPCSTR data) {
+    LPSTR ptr1, ptr2;
+    jstring fontStr;
+    JNIEnv *env = fmi->env;
+    int dslen = strlen(data);
+    jstring fileStr = JNU_NewStringPlatform(env, data);
+
+    /* TTC or ttc means it may be a collection. Need to parse out
+     * multiple font face names separated by " & "
+     * By only doing this for fonts which look like collections based on
+     * file name we are adhering to MS recommendations for font file names
+     * so it seems that we can be sure that this identifies precisely
+     * the MS-supplied truetype collections.
+     * This avoids any potential issues if a TTF file happens to have
+     * a & in the font name (I can't find anything which prohibits this)
+     * and also means we only parse the key in cases we know to be
+     * worthwhile.
+     */
+    if ((data[dslen-1] == 'C' || data[dslen-1] == 'c') &&
+        (ptr1 = strstr(name, " & ")) != NULL) {
+        ptr1+=3;
+        while (ptr1 >= name) { /* marginally safer than while (true) */
+            while ((ptr2 = strstr(ptr1, " & ")) != NULL) {
+                    ptr1 = ptr2+3;
+            }
+            fontStr = JNU_NewStringPlatform(env, ptr1);
+            fontStr = (*env)->CallObjectMethod(env, fontStr,
+                                               fmi->toLowerCaseMID,
+                                               fmi->locale);
+            (*env)->CallObjectMethod(env, fontToFileMap, fmi->putMID,
+                                     fontStr, fileStr);
+            if (ptr1 == name) {
+                break;
+            } else {
+                *(ptr1-3) ='\0';
+                ptr1 = (LPSTR)name;
+            }
+        }
+    } else {
+        fontStr = JNU_NewStringPlatform(env, name);
+        fontStr = (*env)->CallObjectMethod(env, fontStr,
+                                           fmi->toLowerCaseMID, fmi->locale);
+        (*env)->CallObjectMethod(env, fontToFileMap, fmi->putMID,
+                                 fontStr, fileStr);
+    }
+}
+
+static void registerFontW(GdiFontMapInfo *fmi, jobject fontToFileMap,
+                          LPWSTR name, LPWSTR data) {
+
+    wchar_t *ptr1, *ptr2;
+    jstring fontStr;
+    JNIEnv *env = fmi->env;
+    int dslen = wcslen(data);
+    jstring fileStr = (*env)->NewString(env, data, dslen);
+
+    /* TTC or ttc means it may be a collection. Need to parse out
+     * multiple font face names separated by " & "
+     * By only doing this for fonts which look like collections based on
+     * file name we are adhering to MS recommendations for font file names
+     * so it seems that we can be sure that this identifies precisely
+     * the MS-supplied truetype collections.
+     * This avoids any potential issues if a TTF file happens to have
+     * a & in the font name (I can't find anything which prohibits this)
+     * and also means we only parse the key in cases we know to be
+     * worthwhile.
+     */
+
+    if ((data[dslen-1] == L'C' || data[dslen-1] == L'c') &&
+        (ptr1 = wcsstr(name, L" & ")) != NULL) {
+        ptr1+=3;
+        while (ptr1 >= name) { /* marginally safer than while (true) */
+            while ((ptr2 = wcsstr(ptr1, L" & ")) != NULL) {
+                ptr1 = ptr2+3;
+            }
+            fontStr = (*env)->NewString(env, ptr1, wcslen(ptr1));
+            fontStr = (*env)->CallObjectMethod(env, fontStr,
+                                               fmi->toLowerCaseMID,
+                                               fmi->locale);
+            (*env)->CallObjectMethod(env, fontToFileMap, fmi->putMID,
+                                     fontStr, fileStr);
+            if (ptr1 == name) {
+                break;
+            } else {
+                *(ptr1-3) = L'\0';
+                ptr1 = name;
+            }
+        }
+    } else {
+        fontStr = (*env)->NewString(env, name, wcslen(name));
+        fontStr = (*env)->CallObjectMethod(env, fontStr,
+                                           fmi->toLowerCaseMID, fmi->locale);
+        (*env)->CallObjectMethod(env, fontToFileMap, fmi->putMID,
+                                 fontStr, fileStr);
+    }
+}
+
+/* Obtain all the fontname -> filename mappings.
+ * This is called once and the results returned to Java code which can
+ * use it for lookups to reduce or avoid the need to search font files.
+ */
+JNIEXPORT void JNICALL
+Java_sun_font_FontManager_populateFontFileNameMap
+(JNIEnv *env, jclass obj, jobject fontToFileMap,
+ jobject fontToFamilyMap, jobject familyToFontListMap, jobject locale)
+{
+#define MAX_BUFFER (FILENAME_MAX+1)
+    const wchar_t wname[MAX_BUFFER];
+    const char cname[MAX_BUFFER];
+    const char data[MAX_BUFFER];
+
+    DWORD type;
+    LONG ret;
+    HKEY hkeyFonts;
+    DWORD dwNameSize;
+    DWORD dwDataValueSize;
+    DWORD nval;
+    LPCSTR fontKeyName;
+    DWORD dwNumValues, dwMaxValueNameLen, dwMaxValueDataLen;
+    DWORD numValues = 0;
+    jclass classID;
+    jmethodID putMID;
+    GdiFontMapInfo fmi;
+
+    /* Check we were passed all the maps we need, and do lookup of
+     * methods for JNI up-calls
+     */
+    if (fontToFileMap == NULL ||
+        fontToFamilyMap == NULL ||
+        familyToFontListMap == NULL) {
+        return;
+    }
+    classID = (*env)->FindClass(env, "java/util/HashMap");
+    if (classID == NULL) {
+        return;
+    }
+    putMID = (*env)->GetMethodID(env, classID, "put",
+                 "(Ljava/lang/Object;Ljava/lang/Object;)Ljava/lang/Object;");
+    if (putMID == NULL) {
+        return;
+    }
+
+    fmi.env = env;
+    fmi.fontToFamilyMap = fontToFamilyMap;
+    fmi.familyToFontListMap = familyToFontListMap;
+    fmi.putMID = putMID;
+    fmi.locale = locale;
+    fmi.containsKeyMID = (*env)->GetMethodID(env, classID, "containsKey",
+                                             "(Ljava/lang/Object;)Z");
+    if (fmi.containsKeyMID == NULL) {
+        return;
+    }
+
+    fmi.arrayListClass = (*env)->FindClass(env, "java/util/ArrayList");
+    if (fmi.arrayListClass == NULL) {
+        return;
+    }
+    fmi.arrayListCtr = (*env)->GetMethodID(env, fmi.arrayListClass,
+                                              "<init>", "(I)V");
+    if (fmi.arrayListCtr == NULL) {
+        return;
+    }
+    fmi.addMID = (*env)->GetMethodID(env, fmi.arrayListClass,
+                                     "add", "(Ljava/lang/Object;)Z");
+    if (fmi.addMID == NULL) {
+        return;
+    }
+    classID = (*env)->FindClass(env, "java/lang/String");
+    if (classID == NULL) {
+        return;
+    }
+    fmi.toLowerCaseMID =
+        (*env)->GetMethodID(env, classID, "toLowerCase",
+                            "(Ljava/util/Locale;)Ljava/lang/String;");
+    if (fmi.toLowerCaseMID == NULL) {
+        return;
+    }
+
+    /* Enumerate fonts via GDI to build maps of fonts and families */
+    if (IS_NT) {
+        LOGFONTW lfw;
+        memset(&lfw, 0, sizeof(lfw));
+        lfw.lfCharSet = DEFAULT_CHARSET;  /* all charsets */
+        wcscpy(lfw.lfFaceName, L"");      /* one face per family (CHECK) */
+        EnumFontFamiliesExW(GetDC(NULL), &lfw,
+                            (FONTENUMPROCW)EnumFamilyNamesW,
+                            (LPARAM)(&fmi), 0L);
+    } else {
+        LOGFONT lfa;
+        memset(&lfa, 0, sizeof(lfa));
+        lfa.lfCharSet = DEFAULT_CHARSET; /* all charsets */
+        strcpy(lfa.lfFaceName, "");      /* one face per family */
+        ret = EnumFontFamiliesExA(GetDC(NULL), &lfa,
+                            (FONTENUMPROCA)EnumFamilyNamesA,
+                            (LPARAM)(&fmi), 0L);
+    }
+
+    /* Use the windows registry to map font names to files */
+    fontKeyName = (IS_NT) ? FONTKEY_NT : FONTKEY_WIN;
+    ret = RegOpenKeyEx(HKEY_LOCAL_MACHINE,
+                       fontKeyName, 0L, KEY_READ, &hkeyFonts);
+    if (ret != ERROR_SUCCESS) {
+        return;
+    }
+
+    if (IS_NT) {
+        ret = RegQueryInfoKeyW(hkeyFonts, NULL, NULL, NULL, NULL, NULL, NULL,
+                               &dwNumValues, &dwMaxValueNameLen,
+                               &dwMaxValueDataLen, NULL, NULL);
+    } else {
+        ret = RegQueryInfoKeyA(hkeyFonts, NULL, NULL, NULL, NULL, NULL, NULL,
+                               &dwNumValues, &dwMaxValueNameLen,
+                               &dwMaxValueDataLen, NULL, NULL);
+    }
+    if (ret != ERROR_SUCCESS ||
+        dwMaxValueNameLen >= MAX_BUFFER ||
+        dwMaxValueDataLen >= MAX_BUFFER) {
+        RegCloseKey(hkeyFonts);
+        return;
+    }
+    for (nval = 0; nval < dwNumValues; nval++ ) {
+        dwNameSize = MAX_BUFFER;
+        dwDataValueSize = MAX_BUFFER;
+        if (IS_NT) {
+            ret = RegEnumValueW(hkeyFonts, nval, (LPWSTR)wname, &dwNameSize,
+                                NULL, &type, (LPBYTE)data, &dwDataValueSize);
+        } else {
+            ret = RegEnumValueA(hkeyFonts, nval, (LPSTR)cname, &dwNameSize,
+                                NULL, &type, (LPBYTE)data, &dwDataValueSize);
+        }
+        if (ret != ERROR_SUCCESS) {
+            break;
+        }
+        if (type != REG_SZ) { /* REG_SZ means a null-terminated string */
+            continue;
+        }
+        if (IS_NT) {
+            if (!RegistryToBaseTTNameW((LPWSTR)wname) ) {
+                /* If the filename ends with ".ttf" also accept it.
+                 * Not expecting to need to do this for .ttc files.
+                 * Also note this code is not mirrored in the "A" (win9x) path.
+                 */
+                LPWSTR dot = wcsrchr((LPWSTR)data, L'.');
+                if (dot == NULL || (wcsicmp(dot, L".ttf") != 0)) {
+                    continue;  /* not a TT font... */
+                }
+            }
+            registerFontW(&fmi, fontToFileMap, (LPWSTR)wname, (LPWSTR)data);
+        } else {
+            if (!RegistryToBaseTTNameA(cname) ) {
+                continue; /* not a TT font... */
+            }
+            registerFontA(&fmi, fontToFileMap, cname, (LPCSTR)data);
+        }
+    }
+    RegCloseKey(hkeyFonts);
+}