Adding upstream version 1:115.7.0.upstream/1%115.7.0upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1107 insertions, 0 deletions

diff --git a/gfx/thebes/gfxGDIFontList.cpp b/gfx/thebes/gfxGDIFontList.cpp
new file mode 100644
index 0000000000..3c4c7bce07
--- /dev/null
+++ b/gfx/thebes/gfxGDIFontList.cpp
@@ -0,0 +1,1107 @@
+/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "mozilla/DebugOnly.h"
+#include <algorithm>
+
+#include "mozilla/Logging.h"
+#include "mozilla/TextUtils.h"
+#include "mozilla/Sprintf.h"
+
+#include "gfxGDIFontList.h"
+#include "gfxWindowsPlatform.h"
+#include "gfxUserFontSet.h"
+#include "gfxFontUtils.h"
+#include "gfxGDIFont.h"
+
+#include "nsServiceManagerUtils.h"
+#include "nsTArray.h"
+#include "nsUnicharUtils.h"
+
+#include "nsDirectoryServiceUtils.h"
+#include "nsDirectoryServiceDefs.h"
+#include "nsAppDirectoryServiceDefs.h"
+#include "nsPresContext.h"
+#include "gfxFontConstants.h"
+
+#include "mozilla/MemoryReporting.h"
+#include "mozilla/ProfilerLabels.h"
+#include "mozilla/StaticPrefs_gfx.h"
+#include "mozilla/Telemetry.h"
+
+#include <usp10.h>
+
+using namespace mozilla;
+using namespace mozilla::gfx;
+
+#define ROUND(x) floor((x) + 0.5)
+
+#define LOG_FONTLIST(args) \
+  MOZ_LOG(gfxPlatform::GetLog(eGfxLog_fontlist), LogLevel::Debug, args)
+#define LOG_FONTLIST_ENABLED() \
+  MOZ_LOG_TEST(gfxPlatform::GetLog(eGfxLog_fontlist), LogLevel::Debug)
+
+#define LOG_CMAPDATA_ENABLED() \
+  MOZ_LOG_TEST(gfxPlatform::GetLog(eGfxLog_cmapdata), LogLevel::Debug)
+
+static __inline void BuildKeyNameFromFontName(nsAString& aName) {
+  if (aName.Length() >= LF_FACESIZE) aName.Truncate(LF_FACESIZE - 1);
+  ToLowerCase(aName);
+}
+
+// Implementation of gfxPlatformFontList for Win32 GDI,
+// using GDI font enumeration APIs to get the list of fonts
+
+class WinUserFontData : public gfxUserFontData {
+ public:
+  explicit WinUserFontData(HANDLE aFontRef) : mFontRef(aFontRef) {}
+
+  virtual ~WinUserFontData() {
+    DebugOnly<BOOL> success;
+    success = RemoveFontMemResourceEx(mFontRef);
+#if DEBUG
+    if (!success) {
+      char buf[256];
+      SprintfLiteral(
+          buf,
+          "error deleting font handle (%p) - RemoveFontMemResourceEx failed",
+          mFontRef);
+      NS_ASSERTION(success, buf);
+    }
+#endif
+  }
+
+  HANDLE mFontRef;
+};
+
+BYTE FontTypeToOutPrecision(uint8_t fontType) {
+  BYTE ret;
+  switch (fontType) {
+    case GFX_FONT_TYPE_TT_OPENTYPE:
+    case GFX_FONT_TYPE_TRUETYPE:
+      ret = OUT_TT_ONLY_PRECIS;
+      break;
+    case GFX_FONT_TYPE_PS_OPENTYPE:
+      ret = OUT_PS_ONLY_PRECIS;
+      break;
+    case GFX_FONT_TYPE_TYPE1:
+      ret = OUT_OUTLINE_PRECIS;
+      break;
+    case GFX_FONT_TYPE_RASTER:
+      ret = OUT_RASTER_PRECIS;
+      break;
+    case GFX_FONT_TYPE_DEVICE:
+      ret = OUT_DEVICE_PRECIS;
+      break;
+    default:
+      ret = OUT_DEFAULT_PRECIS;
+  }
+  return ret;
+}
+
+/***************************************************************
+ *
+ * GDIFontEntry
+ *
+ */
+
+GDIFontEntry::GDIFontEntry(const nsACString& aFaceName,
+                           gfxWindowsFontType aFontType, SlantStyleRange aStyle,
+                           WeightRange aWeight, StretchRange aStretch,
+                           gfxUserFontData* aUserFontData)
+    : gfxFontEntry(aFaceName), mFontType(aFontType), mForceGDI(false) {
+  mUserFontData.reset(aUserFontData);
+  mStyleRange = aStyle;
+  mWeightRange = aWeight;
+  mStretchRange = aStretch;
+  if (IsType1()) {
+    mForceGDI = true;
+  }
+  mIsDataUserFont = aUserFontData != nullptr;
+
+  InitLogFont(aFaceName, aFontType);
+}
+
+gfxFontEntry* GDIFontEntry::Clone() const {
+  MOZ_ASSERT(!IsUserFont(), "we can only clone installed fonts!");
+  return new GDIFontEntry(Name(), mFontType, SlantStyle(), Weight(), Stretch(),
+                          nullptr);
+}
+
+nsresult GDIFontEntry::ReadCMAP(FontInfoData* aFontInfoData) {
+  AUTO_PROFILER_LABEL("GDIFontEntry::ReadCMAP", OTHER);
+
+  // attempt this once, if errors occur leave a blank cmap
+  if (mCharacterMap) {
+    return NS_OK;
+  }
+
+  // skip non-SFNT fonts completely
+  if (mFontType != GFX_FONT_TYPE_PS_OPENTYPE &&
+      mFontType != GFX_FONT_TYPE_TT_OPENTYPE &&
+      mFontType != GFX_FONT_TYPE_TRUETYPE) {
+    RefPtr<gfxCharacterMap> cmap = new gfxCharacterMap();
+    cmap->mBuildOnTheFly = true;
+    if (mCharacterMap.compareExchange(nullptr, cmap.get())) {
+      Unused << cmap.forget();
+    }
+    return NS_ERROR_FAILURE;
+  }
+
+  RefPtr<gfxCharacterMap> charmap;
+  nsresult rv;
+
+  uint32_t uvsOffset = 0;
+  if (aFontInfoData &&
+      (charmap = GetCMAPFromFontInfo(aFontInfoData, uvsOffset))) {
+    rv = NS_OK;
+  } else {
+    uint32_t kCMAP = TRUETYPE_TAG('c', 'm', 'a', 'p');
+    charmap = new gfxCharacterMap();
+    AutoTArray<uint8_t, 16384> cmap;
+    rv = CopyFontTable(kCMAP, cmap);
+
+    if (NS_SUCCEEDED(rv)) {
+      rv = gfxFontUtils::ReadCMAP(cmap.Elements(), cmap.Length(), *charmap,
+                                  uvsOffset);
+    }
+  }
+
+  if (NS_SUCCEEDED(rv)) {
+    gfxPlatformFontList* pfl = gfxPlatformFontList::PlatformFontList();
+    charmap = pfl->FindCharMap(charmap);
+    mHasCmapTable = true;
+  } else {
+    // if error occurred, initialize to null cmap
+    charmap = new gfxCharacterMap();
+    // For fonts where we failed to read the character map,
+    // we can take a slow path to look up glyphs character by character
+    charmap->mBuildOnTheFly = true;
+  }
+  if (mCharacterMap.compareExchange(nullptr, charmap.get())) {
+    charmap.get()->AddRef();
+  }
+
+  LOG_FONTLIST(("(fontlist-cmap) name: %s, size: %zd hash: %8.8x%s\n",
+                mName.get(), charmap->SizeOfIncludingThis(moz_malloc_size_of),
+                charmap->mHash, mCharacterMap == charmap ? " new" : ""));
+  if (LOG_CMAPDATA_ENABLED()) {
+    char prefix[256];
+    SprintfLiteral(prefix, "(cmapdata) name: %.220s", mName.get());
+    charmap->Dump(prefix, eGfxLog_cmapdata);
+  }
+
+  return rv;
+}
+
+gfxFont* GDIFontEntry::CreateFontInstance(const gfxFontStyle* aFontStyle) {
+  return new gfxGDIFont(this, aFontStyle);
+}
+
+nsresult GDIFontEntry::CopyFontTable(uint32_t aTableTag,
+                                     nsTArray<uint8_t>& aBuffer) {
+  if (!IsTrueType()) {
+    return NS_ERROR_FAILURE;
+  }
+
+  AutoDC dc;
+  AutoSelectFont font(dc.GetDC(), &mLogFont);
+  if (font.IsValid()) {
+    uint32_t tableSize = ::GetFontData(
+        dc.GetDC(), NativeEndian::swapToBigEndian(aTableTag), 0, nullptr, 0);
+    if (tableSize != GDI_ERROR) {
+      if (aBuffer.SetLength(tableSize, fallible)) {
+        ::GetFontData(dc.GetDC(), NativeEndian::swapToBigEndian(aTableTag), 0,
+                      aBuffer.Elements(), tableSize);
+        return NS_OK;
+      }
+      return NS_ERROR_OUT_OF_MEMORY;
+    }
+  }
+  return NS_ERROR_FAILURE;
+}
+
+already_AddRefed<UnscaledFontGDI> GDIFontEntry::LookupUnscaledFont(
+    HFONT aFont) {
+  RefPtr<UnscaledFontGDI> unscaledFont(mUnscaledFont);
+  if (!unscaledFont) {
+    LOGFONT lf;
+    GetObject(aFont, sizeof(LOGFONT), &lf);
+    unscaledFont = new UnscaledFontGDI(lf);
+    mUnscaledFont = unscaledFont;
+  }
+
+  return unscaledFont.forget();
+}
+
+void GDIFontEntry::FillLogFont(LOGFONTW* aLogFont, LONG aWeight,
+                               gfxFloat aSize) {
+  memcpy(aLogFont, &mLogFont, sizeof(LOGFONTW));
+
+  aLogFont->lfHeight = (LONG)-ROUND(aSize);
+
+  if (aLogFont->lfHeight == 0) {
+    aLogFont->lfHeight = -1;
+  }
+
+  // If a non-zero weight is passed in, use this to override the original
+  // weight in the entry's logfont. This is used to control synthetic bolding
+  // for installed families with no bold face, and for downloaded fonts
+  // (but NOT for local user fonts, because it could cause a different,
+  // glyph-incompatible face to be used)
+  if (aWeight != 0) {
+    aLogFont->lfWeight = aWeight;
+  }
+
+  // for non-local() user fonts, we never want to apply italics here;
+  // if the face is described as italic, we should use it as-is,
+  // and if it's not, but then the element is styled italic, we'll use
+  // a cairo transform to create fake italic (oblique)
+  if (mIsDataUserFont) {
+    aLogFont->lfItalic = 0;
+  }
+}
+
+#define MISSING_GLYPH \
+  0x1F  // glyph index returned for missing characters
+        // on WinXP with .fon fonts, but not Type1 (.pfb)
+
+bool GDIFontEntry::TestCharacterMap(uint32_t aCh) {
+  if (!mCharacterMap) {
+    ReadCMAP();
+    NS_ASSERTION(mCharacterMap, "failed to initialize a character map");
+  }
+
+  if (GetCharacterMap()->mBuildOnTheFly) {
+    if (aCh > 0xFFFF) return false;
+
+    // previous code was using the group style
+    gfxFontStyle fakeStyle;
+    if (!IsUpright()) {
+      fakeStyle.style = FontSlantStyle::ITALIC;
+    }
+    fakeStyle.weight = Weight().Min();
+
+    RefPtr<gfxFont> tempFont = FindOrMakeFont(&fakeStyle, nullptr);
+    if (!tempFont || !tempFont->Valid()) return false;
+    gfxGDIFont* font = static_cast<gfxGDIFont*>(tempFont.get());
+
+    HDC dc = GetDC((HWND) nullptr);
+    SetGraphicsMode(dc, GM_ADVANCED);
+    HFONT hfont = font->GetHFONT();
+    HFONT oldFont = (HFONT)SelectObject(dc, hfont);
+
+    wchar_t str[1] = {(wchar_t)aCh};
+    WORD glyph[1];
+
+    bool hasGlyph = false;
+
+    // Bug 573038 - in some cases GetGlyphIndicesW returns 0xFFFF for a
+    // missing glyph or 0x1F in other cases to indicate the "invalid"
+    // glyph.  Map both cases to "not found"
+    if (IsType1() || mForceGDI) {
+      // Type1 fonts and uniscribe APIs don't get along.
+      // ScriptGetCMap will return E_HANDLE
+      DWORD ret =
+          GetGlyphIndicesW(dc, str, 1, glyph, GGI_MARK_NONEXISTING_GLYPHS);
+      if (ret != GDI_ERROR && glyph[0] != 0xFFFF &&
+          (IsType1() || glyph[0] != MISSING_GLYPH)) {
+        hasGlyph = true;
+      }
+    } else {
+      // ScriptGetCMap works better than GetGlyphIndicesW
+      // for things like bitmap/vector fonts
+      SCRIPT_CACHE sc = nullptr;
+      HRESULT rv = ScriptGetCMap(dc, &sc, str, 1, 0, glyph);
+      if (rv == S_OK) hasGlyph = true;
+    }
+
+    SelectObject(dc, oldFont);
+    ReleaseDC(nullptr, dc);
+
+    if (hasGlyph) {
+      GetCharacterMap()->set(aCh);
+      return true;
+    }
+  } else {
+    // font had a cmap so simply check that
+    return GetCharacterMap()->test(aCh);
+  }
+
+  return false;
+}
+
+void GDIFontEntry::InitLogFont(const nsACString& aName,
+                               gfxWindowsFontType aFontType) {
+#define CLIP_TURNOFF_FONTASSOCIATION 0x40
+
+  mLogFont.lfHeight = -1;
+
+  // Fill in logFont structure
+  mLogFont.lfWidth = 0;
+  mLogFont.lfEscapement = 0;
+  mLogFont.lfOrientation = 0;
+  mLogFont.lfUnderline = FALSE;
+  mLogFont.lfStrikeOut = FALSE;
+  mLogFont.lfCharSet = DEFAULT_CHARSET;
+  mLogFont.lfOutPrecision = FontTypeToOutPrecision(aFontType);
+  mLogFont.lfClipPrecision = CLIP_TURNOFF_FONTASSOCIATION;
+  mLogFont.lfQuality = DEFAULT_QUALITY;
+  mLogFont.lfPitchAndFamily = DEFAULT_PITCH | FF_DONTCARE;
+  // always force lfItalic if we want it.  Font selection code will
+  // do its best to give us an italic font entry, but if no face exists
+  // it may give us a regular one based on weight.  Windows should
+  // do fake italic for us in that case.
+  mLogFont.lfItalic = !IsUpright();
+  mLogFont.lfWeight = Weight().Min().ToIntRounded();
+
+  NS_ConvertUTF8toUTF16 name(aName);
+  int len = std::min<int>(name.Length(), LF_FACESIZE - 1);
+  memcpy(&mLogFont.lfFaceName, name.BeginReading(), len * sizeof(char16_t));
+  mLogFont.lfFaceName[len] = '\0';
+}
+
+GDIFontEntry* GDIFontEntry::CreateFontEntry(const nsACString& aName,
+                                            gfxWindowsFontType aFontType,
+                                            SlantStyleRange aStyle,
+                                            WeightRange aWeight,
+                                            StretchRange aStretch,
+                                            gfxUserFontData* aUserFontData) {
+  // jtdfix - need to set charset, pitch/family
+
+  return new GDIFontEntry(aName, aFontType, aStyle, aWeight, aStretch,
+                          aUserFontData);
+}
+
+void GDIFontEntry::AddSizeOfIncludingThis(MallocSizeOf aMallocSizeOf,
+                                          FontListSizes* aSizes) const {
+  aSizes->mFontListSize += aMallocSizeOf(this);
+  AddSizeOfExcludingThis(aMallocSizeOf, aSizes);
+}
+
+/***************************************************************
+ *
+ * GDIFontFamily
+ *
+ */
+
+static bool ShouldIgnoreItalicStyle(const nsACString& aName) {
+  // Ignore italic style's "Meiryo" because "Meiryo (Bold) Italic" has
+  // non-italic style glyphs as Japanese characters.  However, using it
+  // causes serious problem if web pages wants some elements to be
+  // different style from others only with font-style.  For example,
+  // <em> and <i> should be rendered as italic in the default style.
+  return aName.EqualsLiteral("Meiryo") ||
+         aName.EqualsLiteral(
+             "\xe3\x83\xa1\xe3\x82\xa4\xe3\x83\xaa\xe3\x82\xaa");
+}
+
+int CALLBACK GDIFontFamily::FamilyAddStylesProc(
+    const ENUMLOGFONTEXW* lpelfe, const NEWTEXTMETRICEXW* nmetrics,
+    DWORD fontType, LPARAM data) MOZ_NO_THREAD_SAFETY_ANALYSIS {
+  const NEWTEXTMETRICW& metrics = nmetrics->ntmTm;
+  LOGFONTW logFont = lpelfe->elfLogFont;
+  GDIFontFamily* ff = reinterpret_cast<GDIFontFamily*>(data);
+  MOZ_ASSERT(ff->mLock.LockedForWritingByCurrentThread());
+
+  if (logFont.lfItalic && ShouldIgnoreItalicStyle(ff->mName)) {
+    return 1;
+  }
+
+  // Some fonts claim to support things > 900, but we don't so clamp the sizes
+  logFont.lfWeight = clamped(logFont.lfWeight, LONG(100), LONG(900));
+
+  gfxWindowsFontType feType =
+      GDIFontEntry::DetermineFontType(metrics, fontType);
+
+  GDIFontEntry* fe = nullptr;
+  for (uint32_t i = 0; i < ff->mAvailableFonts.Length(); ++i) {
+    fe = static_cast<GDIFontEntry*>(ff->mAvailableFonts[i].get());
+    if (feType > fe->mFontType) {
+      // if the new type is better than the old one, remove the old entries
+      ff->mAvailableFonts.RemoveElementAt(i);
+      --i;
+    } else if (feType < fe->mFontType) {
+      // otherwise if the new type is worse, skip it
+      return 1;
+    }
+  }
+
+  for (uint32_t i = 0; i < ff->mAvailableFonts.Length(); ++i) {
+    fe = static_cast<GDIFontEntry*>(ff->mAvailableFonts[i].get());
+    // check if we already know about this face
+    if (fe->Weight().Min() == FontWeight::FromInt(int32_t(logFont.lfWeight)) &&
+        fe->IsItalic() == (logFont.lfItalic == 0xFF)) {
+      // update the charset bit here since this could be different
+      // XXX Can we still do this now that we store mCharset
+      // on the font family rather than the font entry?
+      ff->mCharset.set(metrics.tmCharSet);
+      return 1;
+    }
+  }
+
+  // We can't set the hasItalicFace flag correctly here,
+  // because we might not have seen the family's italic face(s) yet.
+  // So we'll set that flag for all members after loading all the faces.
+  auto italicStyle = (logFont.lfItalic == 0xFF ? FontSlantStyle::ITALIC
+                                               : FontSlantStyle::NORMAL);
+  fe = GDIFontEntry::CreateFontEntry(
+      NS_ConvertUTF16toUTF8(lpelfe->elfFullName), feType,
+      SlantStyleRange(italicStyle),
+      WeightRange(FontWeight::FromInt(int32_t(logFont.lfWeight))),
+      StretchRange(FontStretch::NORMAL), nullptr);
+  if (!fe) {
+    return 1;
+  }
+
+  ff->AddFontEntryLocked(fe);
+
+  if (LOG_FONTLIST_ENABLED()) {
+    LOG_FONTLIST(
+        ("(fontlist) added (%s) to family (%s)"
+         " with style: %s weight: %ld stretch: normal",
+         fe->Name().get(), ff->Name().get(),
+         (logFont.lfItalic == 0xff) ? "italic" : "normal", logFont.lfWeight));
+  }
+  return 1;
+}
+
+void GDIFontFamily::FindStyleVariationsLocked(FontInfoData* aFontInfoData) {
+  if (mHasStyles) {
+    return;
+  }
+  mHasStyles = true;
+
+  HDC hdc = GetDC(nullptr);
+  SetGraphicsMode(hdc, GM_ADVANCED);
+
+  LOGFONTW logFont;
+  memset(&logFont, 0, sizeof(LOGFONTW));
+  logFont.lfCharSet = DEFAULT_CHARSET;
+  logFont.lfPitchAndFamily = 0;
+  NS_ConvertUTF8toUTF16 name(mName);
+  uint32_t l = std::min<uint32_t>(name.Length(), LF_FACESIZE - 1);
+  memcpy(logFont.lfFaceName, name.get(), l * sizeof(char16_t));
+
+  EnumFontFamiliesExW(hdc, &logFont,
+                      (FONTENUMPROCW)GDIFontFamily::FamilyAddStylesProc,
+                      (LPARAM)this, 0);
+  if (LOG_FONTLIST_ENABLED() && mAvailableFonts.Length() == 0) {
+    LOG_FONTLIST(
+        ("(fontlist) no styles available in family \"%s\"", mName.get()));
+  }
+
+  ReleaseDC(nullptr, hdc);
+
+  if (mIsBadUnderlineFamily) {
+    SetBadUnderlineFonts();
+  }
+
+  CheckForSimpleFamily();
+}
+
+/***************************************************************
+ *
+ * gfxGDIFontList
+ *
+ */
+
+gfxGDIFontList::gfxGDIFontList() : mFontSubstitutes(32) {
+#ifdef MOZ_BUNDLED_FONTS
+  if (StaticPrefs::gfx_bundled_fonts_activate_AtStartup() != 0) {
+    TimeStamp start = TimeStamp::Now();
+    ActivateBundledFonts();
+    TimeStamp end = TimeStamp::Now();
+    Telemetry::Accumulate(Telemetry::FONTLIST_BUNDLEDFONTS_ACTIVATE,
+                          (end - start).ToMilliseconds());
+  }
+#endif
+}
+
+static void RemoveCharsetFromFontSubstitute(nsAString& aName) {
+  int32_t comma = aName.FindChar(char16_t(','));
+  if (comma >= 0) aName.Truncate(comma);
+}
+
+#define MAX_VALUE_NAME 512
+#define MAX_VALUE_DATA 512
+
+nsresult gfxGDIFontList::GetFontSubstitutes() {
+  HKEY hKey;
+  DWORD i, rv, lenAlias, lenActual, valueType;
+  WCHAR aliasName[MAX_VALUE_NAME];
+  WCHAR actualName[MAX_VALUE_DATA];
+
+  if (RegOpenKeyExW(
+          HKEY_LOCAL_MACHINE,
+          L"SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\FontSubstitutes",
+          0, KEY_READ, &hKey) != ERROR_SUCCESS) {
+    return NS_ERROR_FAILURE;
+  }
+
+  for (i = 0, rv = ERROR_SUCCESS; rv != ERROR_NO_MORE_ITEMS; i++) {
+    aliasName[0] = 0;
+    lenAlias = ArrayLength(aliasName);
+    actualName[0] = 0;
+    lenActual = sizeof(actualName);
+    rv = RegEnumValueW(hKey, i, aliasName, &lenAlias, nullptr, &valueType,
+                       (LPBYTE)actualName, &lenActual);
+
+    if (rv != ERROR_SUCCESS || valueType != REG_SZ || lenAlias == 0) {
+      continue;
+    }
+
+    if (aliasName[0] == WCHAR('@')) {
+      continue;
+    }
+
+    nsAutoString substituteName((char16_t*)aliasName);
+    nsAutoString actualFontName((char16_t*)actualName);
+    RemoveCharsetFromFontSubstitute(substituteName);
+    BuildKeyNameFromFontName(substituteName);
+    RemoveCharsetFromFontSubstitute(actualFontName);
+    BuildKeyNameFromFontName(actualFontName);
+    gfxFontFamily* ff;
+    NS_ConvertUTF16toUTF8 substitute(substituteName);
+    NS_ConvertUTF16toUTF8 actual(actualFontName);
+    if (!actual.IsEmpty() && (ff = mFontFamilies.GetWeak(actual))) {
+      mFontSubstitutes.InsertOrUpdate(substitute, RefPtr{ff});
+    } else {
+      mNonExistingFonts.AppendElement(substitute);
+    }
+  }
+
+  // "Courier" on a default Windows install is an ugly bitmap font.
+  // If there is no substitution for Courier in the registry
+  // substitute "Courier" with "Courier New".
+  nsAutoString substituteName;
+  substituteName.AssignLiteral("Courier");
+  BuildKeyNameFromFontName(substituteName);
+  NS_ConvertUTF16toUTF8 substitute(substituteName);
+  if (!mFontSubstitutes.GetWeak(substitute)) {
+    gfxFontFamily* ff;
+    nsAutoString actualFontName;
+    actualFontName.AssignLiteral("Courier New");
+    BuildKeyNameFromFontName(actualFontName);
+    NS_ConvertUTF16toUTF8 actual(actualFontName);
+    ff = mFontFamilies.GetWeak(actual);
+    if (ff) {
+      mFontSubstitutes.InsertOrUpdate(substitute, RefPtr{ff});
+    }
+  }
+  return NS_OK;
+}
+
+nsresult gfxGDIFontList::InitFontListForPlatform() {
+  Telemetry::AutoTimer<Telemetry::GDI_INITFONTLIST_TOTAL> timer;
+
+  mFontSubstitutes.Clear();
+  mNonExistingFonts.Clear();
+
+  // iterate over available families
+  LOGFONTW logfont;
+  memset(&logfont, 0, sizeof(logfont));
+  logfont.lfCharSet = DEFAULT_CHARSET;
+
+  AutoDC hdc;
+  (void)EnumFontFamiliesExW(hdc.GetDC(), &logfont,
+                            (FONTENUMPROCW)&EnumFontFamExProc, 0, 0);
+
+  GetFontSubstitutes();
+
+  GetPrefsAndStartLoader();
+
+  return NS_OK;
+}
+
+int CALLBACK gfxGDIFontList::EnumFontFamExProc(ENUMLOGFONTEXW* lpelfe,
+                                               NEWTEXTMETRICEXW* lpntme,
+                                               DWORD fontType, LPARAM lParam) {
+  const NEWTEXTMETRICW& metrics = lpntme->ntmTm;
+  const LOGFONTW& lf = lpelfe->elfLogFont;
+
+  if (lf.lfFaceName[0] == '@') {
+    return 1;
+  }
+
+  nsAutoString name(lf.lfFaceName);
+  BuildKeyNameFromFontName(name);
+
+  NS_ConvertUTF16toUTF8 key(name);
+
+  gfxGDIFontList* fontList = PlatformFontList();
+  fontList->mLock.AssertCurrentThreadIn();
+
+  if (!fontList->mFontFamilies.Contains(key)) {
+    NS_ConvertUTF16toUTF8 faceName(lf.lfFaceName);
+    FontVisibility visibility = FontVisibility::Unknown;  // TODO
+    RefPtr<GDIFontFamily> family = new GDIFontFamily(faceName, visibility);
+    fontList->mFontFamilies.InsertOrUpdate(key, RefPtr{family});
+
+    // if locale is such that CJK font names are the default coming from
+    // GDI, then if a family name is non-ASCII immediately read in other
+    // family names.  This assures that MS Gothic, MS Mincho are all found
+    // before lookups begin.
+    if (!IsAscii(faceName)) {
+      family->ReadOtherFamilyNames(gfxPlatformFontList::PlatformFontList());
+    }
+
+    if (fontList->mBadUnderlineFamilyNames.ContainsSorted(key)) {
+      family->SetBadUnderlineFamily();
+    }
+
+    family->mWindowsFamily = lf.lfPitchAndFamily & 0xF0;
+    family->mWindowsPitch = lf.lfPitchAndFamily & 0x0F;
+
+    // mark the charset bit
+    family->mCharset.set(metrics.tmCharSet);
+  }
+
+  return 1;
+}
+
+gfxFontEntry* gfxGDIFontList::LookupLocalFont(nsPresContext* aPresContext,
+                                              const nsACString& aFontName,
+                                              WeightRange aWeightForEntry,
+                                              StretchRange aStretchForEntry,
+                                              SlantStyleRange aStyleForEntry) {
+  AutoLock lock(mLock);
+
+  gfxFontEntry* lookup = LookupInFaceNameLists(aFontName);
+  if (!lookup) {
+    return nullptr;
+  }
+
+  bool isCFF = false;  // jtdfix -- need to determine this
+
+  // use the face name from the lookup font entry, which will be the localized
+  // face name which GDI mapping tables use (e.g. with the system locale set to
+  // Dutch, a fullname of 'Arial Bold' will find a font entry with the face name
+  // 'Arial Vet' which can be used as a key in GDI font lookups).
+  GDIFontEntry* fe = GDIFontEntry::CreateFontEntry(
+      lookup->Name(),
+      gfxWindowsFontType(isCFF ? GFX_FONT_TYPE_PS_OPENTYPE
+                               : GFX_FONT_TYPE_TRUETYPE) /*type*/,
+      lookup->SlantStyle(), lookup->Weight(), aStretchForEntry, nullptr);
+
+  if (!fe) return nullptr;
+
+  fe->mIsLocalUserFont = true;
+
+  // make the new font entry match the userfont entry style characteristics
+  fe->mWeightRange = aWeightForEntry;
+  fe->mStyleRange = aStyleForEntry;
+  fe->mStretchRange = aStretchForEntry;
+
+  return fe;
+}
+
+// If aFontData contains only a MS/Symbol cmap subtable, not MS/Unicode,
+// we modify the subtable header to mark it as Unicode instead, because
+// otherwise GDI will refuse to load the font.
+// NOTE that this function does not bounds-check every access to the font data.
+// This is OK because we only use it on data that has already been validated
+// by OTS, and therefore we will not hit out-of-bounds accesses here.
+static bool FixupSymbolEncodedFont(uint8_t* aFontData, uint32_t aLength) {
+  struct CmapHeader {
+    AutoSwap_PRUint16 version;
+    AutoSwap_PRUint16 numTables;
+  };
+  struct CmapEncodingRecord {
+    AutoSwap_PRUint16 platformID;
+    AutoSwap_PRUint16 encodingID;
+    AutoSwap_PRUint32 offset;
+  };
+  const uint32_t kCMAP = TRUETYPE_TAG('c', 'm', 'a', 'p');
+  const TableDirEntry* dir = gfxFontUtils::FindTableDirEntry(aFontData, kCMAP);
+  if (dir && uint32_t(dir->length) >= sizeof(CmapHeader)) {
+    CmapHeader* cmap =
+        reinterpret_cast<CmapHeader*>(aFontData + uint32_t(dir->offset));
+    CmapEncodingRecord* encRec =
+        reinterpret_cast<CmapEncodingRecord*>(cmap + 1);
+    int32_t symbolSubtable = -1;
+    for (uint32_t i = 0; i < (uint16_t)cmap->numTables; ++i) {
+      if (uint16_t(encRec[i].platformID) !=
+          gfxFontUtils::PLATFORM_ID_MICROSOFT) {
+        continue;  // only interested in MS platform
+      }
+      if (uint16_t(encRec[i].encodingID) ==
+          gfxFontUtils::ENCODING_ID_MICROSOFT_UNICODEBMP) {
+        // We've got a Microsoft/Unicode table, so don't interfere.
+        symbolSubtable = -1;
+        break;
+      }
+      if (uint16_t(encRec[i].encodingID) ==
+          gfxFontUtils::ENCODING_ID_MICROSOFT_SYMBOL) {
+        // Found a symbol subtable; remember it for possible fixup,
+        // but if we subsequently find a Microsoft/Unicode subtable,
+        // we'll cancel this.
+        symbolSubtable = i;
+      }
+    }
+    if (symbolSubtable != -1) {
+      // We found a windows/symbol cmap table, and no windows/unicode one;
+      // change the encoding ID so that AddFontMemResourceEx will accept it
+      encRec[symbolSubtable].encodingID =
+          gfxFontUtils::ENCODING_ID_MICROSOFT_UNICODEBMP;
+      return true;
+    }
+  }
+  return false;
+}
+
+gfxFontEntry* gfxGDIFontList::MakePlatformFont(const nsACString& aFontName,
+                                               WeightRange aWeightForEntry,
+                                               StretchRange aStretchForEntry,
+                                               SlantStyleRange aStyleForEntry,
+                                               const uint8_t* aFontData,
+                                               uint32_t aLength) {
+  // MakePlatformFont is responsible for deleting the font data with free
+  // so we set up a stack object to ensure it is freed even if we take an
+  // early exit
+  struct FontDataDeleter {
+    explicit FontDataDeleter(const uint8_t* aFontData) : mFontData(aFontData) {}
+    ~FontDataDeleter() { free((void*)mFontData); }
+    const uint8_t* mFontData;
+  };
+  FontDataDeleter autoDelete(aFontData);
+
+  bool isCFF = gfxFontUtils::IsCffFont(aFontData);
+
+  nsresult rv;
+  HANDLE fontRef = nullptr;
+
+  nsAutoString uniqueName;
+  rv = gfxFontUtils::MakeUniqueUserFontName(uniqueName);
+  if (NS_FAILED(rv)) return nullptr;
+
+  FallibleTArray<uint8_t> newFontData;
+
+  rv = gfxFontUtils::RenameFont(uniqueName, aFontData, aLength, &newFontData);
+
+  if (NS_FAILED(rv)) return nullptr;
+
+  DWORD numFonts = 0;
+
+  uint8_t* fontData = reinterpret_cast<uint8_t*>(newFontData.Elements());
+  uint32_t fontLength = newFontData.Length();
+  NS_ASSERTION(fontData, "null font data after renaming");
+
+  // http://msdn.microsoft.com/en-us/library/ms533942(VS.85).aspx
+  // "A font that is added by AddFontMemResourceEx is always private
+  //  to the process that made the call and is not enumerable."
+  fontRef =
+      AddFontMemResourceEx(fontData, fontLength, 0 /* reserved */, &numFonts);
+  if (!fontRef) {
+    if (FixupSymbolEncodedFont(fontData, fontLength)) {
+      fontRef = AddFontMemResourceEx(fontData, fontLength, 0, &numFonts);
+    }
+  }
+  if (!fontRef) {
+    return nullptr;
+  }
+
+  // only load fonts with a single face contained in the data
+  // AddFontMemResourceEx generates an additional face name for
+  // vertical text if the font supports vertical writing but since
+  // the font is referenced via the name this can be ignored
+  if (fontRef && numFonts > 2) {
+    RemoveFontMemResourceEx(fontRef);
+    return nullptr;
+  }
+
+  // make a new font entry using the unique name
+  WinUserFontData* winUserFontData = new WinUserFontData(fontRef);
+  GDIFontEntry* fe = GDIFontEntry::CreateFontEntry(
+      NS_ConvertUTF16toUTF8(uniqueName),
+      gfxWindowsFontType(isCFF ? GFX_FONT_TYPE_PS_OPENTYPE
+                               : GFX_FONT_TYPE_TRUETYPE) /*type*/,
+      aStyleForEntry, aWeightForEntry, aStretchForEntry, winUserFontData);
+
+  if (fe) {
+    fe->mIsDataUserFont = true;
+  }
+
+  return fe;
+}
+
+bool gfxGDIFontList::FindAndAddFamiliesLocked(
+    nsPresContext* aPresContext, StyleGenericFontFamily aGeneric,
+    const nsACString& aFamily, nsTArray<FamilyAndGeneric>* aOutput,
+    FindFamiliesFlags aFlags, gfxFontStyle* aStyle, nsAtom* aLanguage,
+    gfxFloat aDevToCssSize) {
+  NS_ConvertUTF8toUTF16 key16(aFamily);
+  BuildKeyNameFromFontName(key16);
+  NS_ConvertUTF16toUTF8 keyName(key16);
+
+  gfxFontFamily* ff = mFontSubstitutes.GetWeak(keyName);
+  FontVisibility level =
+      aPresContext ? aPresContext->GetFontVisibility() : FontVisibility::User;
+  if (ff && IsVisibleToCSS(*ff, level)) {
+    aOutput->AppendElement(FamilyAndGeneric(ff, aGeneric));
+    return true;
+  }
+
+  if (mNonExistingFonts.Contains(keyName)) {
+    return false;
+  }
+
+  return gfxPlatformFontList::FindAndAddFamiliesLocked(
+      aPresContext, aGeneric, aFamily, aOutput, aFlags, aStyle, aLanguage,
+      aDevToCssSize);
+}
+
+FontFamily gfxGDIFontList::GetDefaultFontForPlatform(
+    nsPresContext* aPresContext, const gfxFontStyle* aStyle,
+    nsAtom* aLanguage) {
+  FontFamily ff;
+
+  // this really shouldn't fail to find a font....
+  NONCLIENTMETRICSW ncm;
+  ncm.cbSize = sizeof(ncm);
+  BOOL status =
+      ::SystemParametersInfoW(SPI_GETNONCLIENTMETRICS, sizeof(ncm), &ncm, 0);
+  if (status) {
+    ff = FindFamily(aPresContext,
+                    NS_ConvertUTF16toUTF8(ncm.lfMessageFont.lfFaceName));
+    if (!ff.IsNull()) {
+      return ff;
+    }
+  }
+
+  // ...but just in case, try another (long-deprecated) approach as well
+  HGDIOBJ hGDI = ::GetStockObject(DEFAULT_GUI_FONT);
+  LOGFONTW logFont;
+  if (hGDI && ::GetObjectW(hGDI, sizeof(logFont), &logFont)) {
+    ff = FindFamily(aPresContext, NS_ConvertUTF16toUTF8(logFont.lfFaceName));
+  }
+
+  return ff;
+}
+
+void gfxGDIFontList::AddSizeOfExcludingThis(MallocSizeOf aMallocSizeOf,
+                                            FontListSizes* aSizes) const {
+  gfxPlatformFontList::AddSizeOfExcludingThis(aMallocSizeOf, aSizes);
+
+  AutoLock lock(mLock);
+
+  aSizes->mFontListSize +=
+      SizeOfFontFamilyTableExcludingThis(mFontSubstitutes, aMallocSizeOf);
+  aSizes->mFontListSize +=
+      mNonExistingFonts.ShallowSizeOfExcludingThis(aMallocSizeOf);
+  for (uint32_t i = 0; i < mNonExistingFonts.Length(); ++i) {
+    aSizes->mFontListSize +=
+        mNonExistingFonts[i].SizeOfExcludingThisIfUnshared(aMallocSizeOf);
+  }
+}
+
+void gfxGDIFontList::AddSizeOfIncludingThis(MallocSizeOf aMallocSizeOf,
+                                            FontListSizes* aSizes) const {
+  aSizes->mFontListSize += aMallocSizeOf(this);
+  AddSizeOfExcludingThis(aMallocSizeOf, aSizes);
+}
+
+// used to load system-wide font info on off-main thread
+class GDIFontInfo : public FontInfoData {
+ public:
+  GDIFontInfo(bool aLoadOtherNames, bool aLoadFaceNames, bool aLoadCmaps)
+      : FontInfoData(aLoadOtherNames, aLoadFaceNames, aLoadCmaps) {}
+
+  virtual ~GDIFontInfo() = default;
+
+  virtual void Load() {
+    mHdc = GetDC(nullptr);
+    SetGraphicsMode(mHdc, GM_ADVANCED);
+    FontInfoData::Load();
+    ReleaseDC(nullptr, mHdc);
+  }
+
+  // loads font data for all members of a given family
+  virtual void LoadFontFamilyData(const nsACString& aFamilyName);
+
+  // callback for GDI EnumFontFamiliesExW call
+  static int CALLBACK EnumerateFontsForFamily(const ENUMLOGFONTEXW* lpelfe,
+                                              const NEWTEXTMETRICEXW* nmetrics,
+                                              DWORD fontType, LPARAM data);
+
+  HDC mHdc;
+};
+
+struct EnumerateFontsForFamilyData {
+  EnumerateFontsForFamilyData(const nsACString& aFamilyName,
+                              GDIFontInfo& aFontInfo)
+      : mFamilyName(aFamilyName), mFontInfo(aFontInfo) {}
+
+  nsCString mFamilyName;
+  nsTArray<nsCString> mOtherFamilyNames;
+  GDIFontInfo& mFontInfo;
+  nsCString mPreviousFontName;
+};
+
+int CALLBACK GDIFontInfo::EnumerateFontsForFamily(
+    const ENUMLOGFONTEXW* lpelfe, const NEWTEXTMETRICEXW* nmetrics,
+    DWORD fontType, LPARAM data) {
+  EnumerateFontsForFamilyData* famData =
+      reinterpret_cast<EnumerateFontsForFamilyData*>(data);
+  HDC hdc = famData->mFontInfo.mHdc;
+  LOGFONTW logFont = lpelfe->elfLogFont;
+  const NEWTEXTMETRICW& metrics = nmetrics->ntmTm;
+
+  AutoSelectFont font(hdc, &logFont);
+  if (!font.IsValid()) {
+    return 1;
+  }
+
+  FontFaceData fontData;
+  NS_ConvertUTF16toUTF8 fontName(lpelfe->elfFullName);
+
+  // callback called for each style-charset so return if style already seen
+  if (fontName.Equals(famData->mPreviousFontName)) {
+    return 1;
+  }
+  famData->mPreviousFontName = fontName;
+  famData->mFontInfo.mLoadStats.fonts++;
+
+  // read name table info
+  bool nameDataLoaded = false;
+  if (famData->mFontInfo.mLoadFaceNames || famData->mFontInfo.mLoadOtherNames) {
+    uint32_t kNAME =
+        NativeEndian::swapToBigEndian(TRUETYPE_TAG('n', 'a', 'm', 'e'));
+    uint32_t nameSize;
+    AutoTArray<uint8_t, 1024> nameData;
+
+    nameSize = ::GetFontData(hdc, kNAME, 0, nullptr, 0);
+    if (nameSize != GDI_ERROR && nameSize > 0 &&
+        nameData.SetLength(nameSize, fallible)) {
+      ::GetFontData(hdc, kNAME, 0, nameData.Elements(), nameSize);
+
+      // face names
+      if (famData->mFontInfo.mLoadFaceNames) {
+        gfxFontUtils::ReadCanonicalName((const char*)(nameData.Elements()),
+                                        nameSize, gfxFontUtils::NAME_ID_FULL,
+                                        fontData.mFullName);
+        gfxFontUtils::ReadCanonicalName(
+            (const char*)(nameData.Elements()), nameSize,
+            gfxFontUtils::NAME_ID_POSTSCRIPT, fontData.mPostscriptName);
+        nameDataLoaded = true;
+        famData->mFontInfo.mLoadStats.facenames++;
+      }
+
+      // other family names
+      if (famData->mFontInfo.mLoadOtherNames) {
+        gfxFontUtils::ReadOtherFamilyNamesForFace(
+            famData->mFamilyName, (const char*)(nameData.Elements()), nameSize,
+            famData->mOtherFamilyNames, false);
+      }
+    }
+  }
+
+  // read cmap
+  bool cmapLoaded = false;
+  gfxWindowsFontType feType =
+      GDIFontEntry::DetermineFontType(metrics, fontType);
+  if (famData->mFontInfo.mLoadCmaps && (feType == GFX_FONT_TYPE_PS_OPENTYPE ||
+                                        feType == GFX_FONT_TYPE_TT_OPENTYPE ||
+                                        feType == GFX_FONT_TYPE_TRUETYPE)) {
+    uint32_t kCMAP =
+        NativeEndian::swapToBigEndian(TRUETYPE_TAG('c', 'm', 'a', 'p'));
+    uint32_t cmapSize;
+    AutoTArray<uint8_t, 1024> cmapData;
+
+    cmapSize = ::GetFontData(hdc, kCMAP, 0, nullptr, 0);
+    if (cmapSize != GDI_ERROR && cmapSize > 0 &&
+        cmapData.SetLength(cmapSize, fallible)) {
+      ::GetFontData(hdc, kCMAP, 0, cmapData.Elements(), cmapSize);
+      RefPtr<gfxCharacterMap> charmap = new gfxCharacterMap();
+      uint32_t offset;
+
+      if (NS_SUCCEEDED(gfxFontUtils::ReadCMAP(cmapData.Elements(), cmapSize,
+                                              *charmap, offset))) {
+        fontData.mCharacterMap = charmap;
+        fontData.mUVSOffset = offset;
+        cmapLoaded = true;
+        famData->mFontInfo.mLoadStats.cmaps++;
+      }
+    }
+  }
+
+  if (cmapLoaded || nameDataLoaded) {
+    famData->mFontInfo.mFontFaceData.InsertOrUpdate(fontName, fontData);
+  }
+
+  return famData->mFontInfo.mCanceled ? 0 : 1;
+}
+
+void GDIFontInfo::LoadFontFamilyData(const nsACString& aFamilyName) {
+  // iterate over the family
+  LOGFONTW logFont;
+  memset(&logFont, 0, sizeof(LOGFONTW));
+  logFont.lfCharSet = DEFAULT_CHARSET;
+  logFont.lfPitchAndFamily = 0;
+  NS_ConvertUTF8toUTF16 name(aFamilyName);
+  uint32_t l = std::min<uint32_t>(name.Length(), LF_FACESIZE - 1);
+  memcpy(logFont.lfFaceName, name.BeginReading(), l * sizeof(char16_t));
+
+  EnumerateFontsForFamilyData data(aFamilyName, *this);
+
+  EnumFontFamiliesExW(mHdc, &logFont,
+                      (FONTENUMPROCW)GDIFontInfo::EnumerateFontsForFamily,
+                      (LPARAM)(&data), 0);
+
+  // if found other names, insert them
+  if (data.mOtherFamilyNames.Length() != 0) {
+    mOtherFamilyNames.InsertOrUpdate(aFamilyName, data.mOtherFamilyNames);
+    mLoadStats.othernames += data.mOtherFamilyNames.Length();
+  }
+}
+
+already_AddRefed<FontInfoData> gfxGDIFontList::CreateFontInfoData() {
+  bool loadCmaps = !UsesSystemFallback() ||
+                   gfxPlatform::GetPlatform()->UseCmapsDuringSystemFallback();
+
+  RefPtr<GDIFontInfo> fi =
+      new GDIFontInfo(true, NeedFullnamePostscriptNames(), loadCmaps);
+
+  return fi.forget();
+}
+
+gfxFontFamily* gfxGDIFontList::CreateFontFamily(
+    const nsACString& aName, FontVisibility aVisibility) const {
+  return new GDIFontFamily(aName, aVisibility);
+}
+
+#ifdef MOZ_BUNDLED_FONTS
+
+void gfxGDIFontList::ActivateBundledFonts() {
+  nsCOMPtr<nsIFile> localDir;
+  nsresult rv = NS_GetSpecialDirectory(NS_GRE_DIR, getter_AddRefs(localDir));
+  if (NS_FAILED(rv)) {
+    return;
+  }
+  if (NS_FAILED(localDir->Append(u"fonts"_ns))) {
+    return;
+  }
+  bool isDir;
+  if (NS_FAILED(localDir->IsDirectory(&isDir)) || !isDir) {
+    return;
+  }
+
+  nsCOMPtr<nsIDirectoryEnumerator> e;
+  rv = localDir->GetDirectoryEntries(getter_AddRefs(e));
+  if (NS_FAILED(rv)) {
+    return;
+  }
+
+  nsCOMPtr<nsIFile> file;
+  while (NS_SUCCEEDED(e->GetNextFile(getter_AddRefs(file))) && file) {
+    nsAutoString path;
+    if (NS_FAILED(file->GetPath(path))) {
+      continue;
+    }
+    AddFontResourceExW(path.get(), FR_PRIVATE, nullptr);
+  }
+}
+
+#endif