Add m-esr52 at 52.6.0

1 files changed, 357 insertions, 0 deletions

diff --git a/gfx/2d/SFNTNameTable.cpp b/gfx/2d/SFNTNameTable.cpp
new file mode 100644
index 000000000..a30c6bd97
--- /dev/null
+++ b/gfx/2d/SFNTNameTable.cpp
@@ -0,0 +1,357 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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 "SFNTNameTable.h"
+
+#include "BigEndianInts.h"
+#include "Logging.h"
+#include "mozilla/Move.h"
+
+#if defined(XP_MACOSX)
+#include <CoreFoundation/CoreFoundation.h>
+#endif
+
+namespace mozilla {
+namespace gfx {
+
+static const BigEndianUint16 FORMAT_0 = 0;
+
+static const BigEndianUint16 NAME_ID_FAMILY = 1;
+static const BigEndianUint16 NAME_ID_STYLE = 2;
+static const BigEndianUint16 NAME_ID_FULL = 4;
+
+static const BigEndianUint16 PLATFORM_ID_UNICODE = 0;
+static const BigEndianUint16 PLATFORM_ID_MAC = 1;
+static const BigEndianUint16 PLATFORM_ID_MICROSOFT = 3;
+
+static const BigEndianUint16 ENCODING_ID_MICROSOFT_SYMBOL = 0;
+static const BigEndianUint16 ENCODING_ID_MICROSOFT_UNICODEBMP = 1;
+static const BigEndianUint16 ENCODING_ID_MICROSOFT_UNICODEFULL = 10;
+
+static const BigEndianUint16 ENCODING_ID_MAC_ROMAN = 0;
+
+static const BigEndianUint16 LANG_ID_MAC_ENGLISH = 0;
+
+static const BigEndianUint16 LANG_ID_MICROSOFT_EN_US = 0x0409;
+
+#pragma pack(push, 1)
+
+// Name table has a header, followed by name records, followed by string data.
+struct NameHeader
+{
+  BigEndianUint16 format;       // Format selector (=0).
+  BigEndianUint16 count;        // Number of name records.
+  BigEndianUint16 stringOffset; // Offset to string storage from start of table.
+};
+
+struct NameRecord
+{
+  BigEndianUint16 platformID;
+  BigEndianUint16 encodingID; // Platform-specific encoding ID
+  BigEndianUint16 languageID;
+  BigEndianUint16 nameID;
+  BigEndianUint16 length;     // String length in bytes.
+  BigEndianUint16 offset;     // String offset from start of storage in bytes.
+};
+
+#pragma pack(pop)
+
+enum ENameDecoder : int
+{
+  eNameDecoderUTF16,
+#if defined(XP_MACOSX)
+  eNameDecoderMacRoman,
+#endif
+  eNameDecoderNone
+};
+
+/* static */
+UniquePtr<SFNTNameTable>
+SFNTNameTable::Create(const uint8_t *aNameData, uint32_t aDataLength)
+{
+  MOZ_ASSERT(aNameData);
+
+  if (aDataLength < sizeof(NameHeader)) {
+    gfxWarning() << "Name data too short to contain NameHeader.";
+    return nullptr;
+  }
+
+  const NameHeader *nameHeader = reinterpret_cast<const NameHeader*>(aNameData);
+  if (nameHeader->format != FORMAT_0) {
+    gfxWarning() << "Only Name Table Format 0 is supported.";
+    return nullptr;
+  }
+
+  uint16_t stringOffset = nameHeader->stringOffset;
+
+  if (stringOffset !=
+      sizeof(NameHeader) + (nameHeader->count * sizeof(NameRecord))) {
+    gfxWarning() << "Name table string offset is incorrect.";
+    return nullptr;
+  }
+
+  if (aDataLength < stringOffset) {
+    gfxWarning() << "Name data too short to contain name records.";
+    return nullptr;
+  }
+
+  return UniquePtr<SFNTNameTable>(
+    new SFNTNameTable(nameHeader, aNameData, aDataLength));
+}
+
+SFNTNameTable::SFNTNameTable(const NameHeader *aNameHeader,
+                             const uint8_t *aNameData, uint32_t aDataLength)
+  : mFirstRecord(reinterpret_cast<const NameRecord*>(aNameData
+                                                     + sizeof(NameHeader)))
+  , mEndOfRecords(mFirstRecord + aNameHeader->count)
+  , mStringData(aNameData + aNameHeader->stringOffset)
+  , mStringDataLength(aDataLength - aNameHeader->stringOffset)
+{
+  MOZ_ASSERT(reinterpret_cast<const uint8_t*>(aNameHeader) == aNameData);
+}
+
+static bool
+IsUTF16Encoding(const NameRecord *aNameRecord)
+{
+  if (aNameRecord->platformID == PLATFORM_ID_MICROSOFT &&
+      (aNameRecord->encodingID == ENCODING_ID_MICROSOFT_UNICODEBMP ||
+       aNameRecord->encodingID == ENCODING_ID_MICROSOFT_SYMBOL)) {
+    return true;
+  }
+
+  if (aNameRecord->platformID == PLATFORM_ID_UNICODE) {
+    return true;
+  }
+
+  return false;
+}
+
+#if defined(XP_MACOSX)
+static bool
+IsMacRomanEncoding(const NameRecord *aNameRecord)
+{
+  if (aNameRecord->platformID == PLATFORM_ID_MAC &&
+      aNameRecord->encodingID == ENCODING_ID_MAC_ROMAN) {
+    return true;
+  }
+
+  return false;
+}
+#endif
+
+static NameRecordMatchers*
+CreateCanonicalMatchers(const BigEndianUint16& aNameID)
+{
+  // For Windows, we return only Microsoft platform name record
+  // matchers. On Mac, we return matchers for both Microsoft platform
+  // records and Mac platform records.
+  NameRecordMatchers *matchers = new NameRecordMatchers();
+
+#if defined(XP_MACOSX)
+  // First, look for the English name.
+  if (!matchers->append(
+    [=](const NameRecord *aNameRecord) {
+        if (aNameRecord->nameID == aNameID &&
+            aNameRecord->languageID == LANG_ID_MAC_ENGLISH &&
+            aNameRecord->platformID == PLATFORM_ID_MAC &&
+            IsMacRomanEncoding(aNameRecord)) {
+          return eNameDecoderMacRoman;
+        } else  {
+          return eNameDecoderNone;
+        }
+    })) {
+    MOZ_CRASH();
+  }
+
+  // Second, look for all languages.
+  if (!matchers->append(
+    [=](const NameRecord *aNameRecord) {
+        if (aNameRecord->nameID == aNameID &&
+            aNameRecord->platformID == PLATFORM_ID_MAC &&
+            IsMacRomanEncoding(aNameRecord)) {
+          return eNameDecoderMacRoman;
+        } else  {
+          return eNameDecoderNone;
+        }
+    })) {
+    MOZ_CRASH();
+  }
+#endif /* defined(XP_MACOSX) */
+
+  // First, look for the English name (this will normally succeed).
+  if (!matchers->append(
+    [=](const NameRecord *aNameRecord) {
+        if (aNameRecord->nameID == aNameID &&
+            aNameRecord->languageID == LANG_ID_MICROSOFT_EN_US &&
+            aNameRecord->platformID == PLATFORM_ID_MICROSOFT &&
+            IsUTF16Encoding(aNameRecord)) {
+          return eNameDecoderUTF16;
+        } else {
+          return eNameDecoderNone;
+        }
+    })) {
+    MOZ_CRASH();
+  }
+
+  // Second, look for all languages.
+  if (!matchers->append(
+    [=](const NameRecord *aNameRecord) {
+        if (aNameRecord->nameID == aNameID &&
+            aNameRecord->platformID == PLATFORM_ID_MICROSOFT &&
+            IsUTF16Encoding(aNameRecord)) {
+          return eNameDecoderUTF16;
+        } else {
+          return eNameDecoderNone;
+        }
+    })) {
+    MOZ_CRASH();
+  }
+
+  return matchers;
+}
+
+static const NameRecordMatchers&
+FullNameMatchers()
+{
+  static const NameRecordMatchers *sFullNameMatchers =
+    CreateCanonicalMatchers(NAME_ID_FULL);
+  return *sFullNameMatchers;
+}
+
+static const NameRecordMatchers&
+FamilyMatchers()
+{
+  static const NameRecordMatchers *sFamilyMatchers =
+    CreateCanonicalMatchers(NAME_ID_FAMILY);
+  return *sFamilyMatchers;
+}
+
+static const NameRecordMatchers&
+StyleMatchers()
+{
+  static const NameRecordMatchers *sStyleMatchers =
+    CreateCanonicalMatchers(NAME_ID_STYLE);
+  return *sStyleMatchers;
+}
+
+bool
+SFNTNameTable::GetU16FullName(mozilla::u16string& aU16FullName)
+{
+  if (ReadU16Name(FullNameMatchers(), aU16FullName)) {
+    return true;
+  }
+
+  // If the full name record doesn't exist create the name from the family space
+  // concatenated with the style.
+  mozilla::u16string familyName;
+  if (!ReadU16Name(FamilyMatchers(), familyName)) {
+    return false;
+  }
+
+  mozilla::u16string styleName;
+  if (!ReadU16Name(StyleMatchers(), styleName)) {
+    return false;
+  }
+
+  aU16FullName.assign(Move(familyName));
+  aU16FullName.append(u" ");
+  aU16FullName.append(styleName);
+  return true;
+}
+
+bool
+SFNTNameTable::ReadU16Name(const NameRecordMatchers& aMatchers,
+                           mozilla::u16string& aU16Name)
+{
+  MOZ_ASSERT(!aMatchers.empty());
+
+  for (size_t i = 0; i < aMatchers.length(); ++i) {
+    const NameRecord* record = mFirstRecord;
+    while (record != mEndOfRecords) {
+      switch (aMatchers[i](record)) {
+        case eNameDecoderUTF16:
+          return ReadU16NameFromU16Record(record, aU16Name);
+#if defined(XP_MACOSX)
+        case eNameDecoderMacRoman:
+          return ReadU16NameFromMacRomanRecord(record, aU16Name);
+#endif
+        case eNameDecoderNone:
+          break;
+        default:
+          MOZ_CRASH("Invalid matcher encoding type");
+          break;
+      }
+      ++record;
+    }
+  }
+
+  return false;
+}
+
+bool
+SFNTNameTable::ReadU16NameFromU16Record(const NameRecord *aNameRecord,
+                                        mozilla::u16string& aU16Name)
+{
+  uint32_t offset = aNameRecord->offset;
+  uint32_t length = aNameRecord->length;
+  if (mStringDataLength < offset + length) {
+    gfxWarning() << "Name data too short to contain name string.";
+    return false;
+  }
+
+  const uint8_t *startOfName = mStringData + offset;
+  size_t actualLength = length / sizeof(char16_t);
+  UniquePtr<char16_t[]> nameData(new char16_t[actualLength]);
+  NativeEndian::copyAndSwapFromBigEndian(nameData.get(), startOfName,
+                                         actualLength);
+
+  aU16Name.assign(nameData.get(), actualLength);
+  return true;
+}
+
+#if defined(XP_MACOSX)
+bool
+SFNTNameTable::ReadU16NameFromMacRomanRecord(const NameRecord *aNameRecord,
+                                             mozilla::u16string& aU16Name)
+{
+  uint32_t offset = aNameRecord->offset;
+  uint32_t length = aNameRecord->length;
+  if (mStringDataLength < offset + length) {
+    gfxWarning() << "Name data too short to contain name string.";
+    return false;
+  }
+  if (length > INT_MAX) {
+    gfxWarning() << "Name record too long to decode.";
+    return false;
+  }
+
+  // pointer to the Mac Roman encoded string in the name record
+  const uint8_t *encodedStr = mStringData + offset;
+
+  CFStringRef cfString;
+  cfString = CFStringCreateWithBytesNoCopy(kCFAllocatorDefault, encodedStr,
+                                           length, kCFStringEncodingMacRoman,
+                                           false, kCFAllocatorNull);
+
+  // length (in UTF-16 code pairs) of the decoded string
+  CFIndex decodedLength = CFStringGetLength(cfString);
+
+  // temporary buffer
+  UniquePtr<UniChar[]> u16Buffer = MakeUnique<UniChar[]>(decodedLength);
+
+  CFStringGetCharacters(cfString, CFRangeMake(0, decodedLength),
+                        u16Buffer.get());
+
+  CFRelease(cfString);
+
+  aU16Name.assign(reinterpret_cast<char16_t*>(u16Buffer.get()), decodedLength);
+
+  return true;
+}
+#endif
+
+} // gfx
+} // mozilla