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-rw-r--r--gfx/graphite2/src/NameTable.cpp255
1 files changed, 255 insertions, 0 deletions
diff --git a/gfx/graphite2/src/NameTable.cpp b/gfx/graphite2/src/NameTable.cpp
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index 000000000..2baa1bbdc
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+++ b/gfx/graphite2/src/NameTable.cpp
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+/* GRAPHITE2 LICENSING
+
+ Copyright 2010, SIL International
+ All rights reserved.
+
+ This library is free software; you can redistribute it and/or modify
+ it under the terms of the GNU Lesser General Public License as published
+ by the Free Software Foundation; either version 2.1 of License, or
+ (at your option) any later version.
+
+ This program 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
+ Lesser General Public License for more details.
+
+ You should also have received a copy of the GNU Lesser General Public
+ License along with this library in the file named "LICENSE".
+ If not, write to the Free Software Foundation, 51 Franklin Street,
+ Suite 500, Boston, MA 02110-1335, USA or visit their web page on the
+ internet at http://www.fsf.org/licenses/lgpl.html.
+
+Alternatively, the contents of this file may be used under the terms of the
+Mozilla Public License (http://mozilla.org/MPL) or the GNU General Public
+License, as published by the Free Software Foundation, either version 2
+of the License or (at your option) any later version.
+*/
+#include "inc/Main.h"
+#include "inc/Endian.h"
+
+#include "inc/NameTable.h"
+#include "inc/UtfCodec.h"
+
+using namespace graphite2;
+
+NameTable::NameTable(const void* data, size_t length, uint16 platformId, uint16 encodingID)
+ : m_platformId(0), m_encodingId(0), m_languageCount(0),
+ m_platformOffset(0), m_platformLastRecord(0), m_nameDataLength(0),
+ m_table(0), m_nameData(NULL)
+{
+ void *pdata = gralloc<byte>(length);
+ if (!pdata) return;
+ memcpy(pdata, data, length);
+ m_table = reinterpret_cast<const TtfUtil::Sfnt::FontNames*>(pdata);
+
+ if ((length > sizeof(TtfUtil::Sfnt::FontNames)) &&
+ (length > sizeof(TtfUtil::Sfnt::FontNames) +
+ sizeof(TtfUtil::Sfnt::NameRecord) * ( be::swap<uint16>(m_table->count) - 1)))
+ {
+ uint16 offset = be::swap<uint16>(m_table->string_offset);
+ if (offset < length)
+ {
+ m_nameData = reinterpret_cast<const uint8*>(pdata) + offset;
+ setPlatformEncoding(platformId, encodingID);
+ m_nameDataLength = length - offset;
+ return;
+ }
+ }
+ free(const_cast<TtfUtil::Sfnt::FontNames*>(m_table));
+ m_table = NULL;
+}
+
+uint16 NameTable::setPlatformEncoding(uint16 platformId, uint16 encodingID)
+{
+ if (!m_nameData) return 0;
+ uint16 i = 0;
+ uint16 count = be::swap<uint16>(m_table->count);
+ for (; i < count; i++)
+ {
+ if (be::swap<uint16>(m_table->name_record[i].platform_id) == platformId &&
+ be::swap<uint16>(m_table->name_record[i].platform_specific_id) == encodingID)
+ {
+ m_platformOffset = i;
+ break;
+ }
+ }
+ while ((++i < count) &&
+ (be::swap<uint16>(m_table->name_record[i].platform_id) == platformId) &&
+ (be::swap<uint16>(m_table->name_record[i].platform_specific_id) == encodingID))
+ {
+ m_platformLastRecord = i;
+ }
+ m_encodingId = encodingID;
+ m_platformId = platformId;
+ return 0;
+}
+
+void* NameTable::getName(uint16& languageId, uint16 nameId, gr_encform enc, uint32& length)
+{
+ uint16 anyLang = 0;
+ uint16 enUSLang = 0;
+ uint16 bestLang = 0;
+ if (!m_table)
+ {
+ languageId = 0;
+ length = 0;
+ return NULL;
+ }
+ for (uint16 i = m_platformOffset; i <= m_platformLastRecord; i++)
+ {
+ if (be::swap<uint16>(m_table->name_record[i].name_id) == nameId)
+ {
+ uint16 langId = be::swap<uint16>(m_table->name_record[i].language_id);
+ if (langId == languageId)
+ {
+ bestLang = i;
+ break;
+ }
+ // MS language tags have the language in the lower byte, region in the higher
+ else if ((langId & 0xFF) == (languageId & 0xFF))
+ {
+ bestLang = i;
+ }
+ else if (langId == 0x409)
+ {
+ enUSLang = i;
+ }
+ else
+ {
+ anyLang = i;
+ }
+ }
+ }
+ if (!bestLang)
+ {
+ if (enUSLang) bestLang = enUSLang;
+ else
+ {
+ bestLang = anyLang;
+ if (!anyLang)
+ {
+ languageId = 0;
+ length = 0;
+ return NULL;
+ }
+ }
+ }
+ const TtfUtil::Sfnt::NameRecord & nameRecord = m_table->name_record[bestLang];
+ languageId = be::swap<uint16>(nameRecord.language_id);
+ uint16 utf16Length = be::swap<uint16>(nameRecord.length);
+ uint16 offset = be::swap<uint16>(nameRecord.offset);
+ if(offset + utf16Length > m_nameDataLength)
+ {
+ languageId = 0;
+ length = 0;
+ return NULL;
+ }
+ utf16Length >>= 1; // in utf16 units
+ utf16::codeunit_t * utf16Name = gralloc<utf16::codeunit_t>(utf16Length + 1);
+ if (!utf16Name)
+ {
+ languageId = 0;
+ length = 0;
+ return NULL;
+ }
+ const uint8* pName = m_nameData + offset;
+ for (size_t i = 0; i < utf16Length; i++)
+ {
+ utf16Name[i] = be::read<uint16>(pName);
+ }
+ utf16Name[utf16Length] = 0;
+ if (!utf16::validate(utf16Name, utf16Name + utf16Length))
+ {
+ free(utf16Name);
+ languageId = 0;
+ length = 0;
+ return NULL;
+ }
+ switch (enc)
+ {
+ case gr_utf8:
+ {
+ utf8::codeunit_t* uniBuffer = gralloc<utf8::codeunit_t>(3 * utf16Length + 1);
+ if (!uniBuffer)
+ {
+ free(utf16Name);
+ languageId = 0;
+ length = 0;
+ return NULL;
+ }
+ utf8::iterator d = uniBuffer;
+ for (utf16::const_iterator s = utf16Name, e = utf16Name + utf16Length; s != e; ++s, ++d)
+ *d = *s;
+ length = d - uniBuffer;
+ uniBuffer[length] = 0;
+ free(utf16Name);
+ return uniBuffer;
+ }
+ case gr_utf16:
+ length = utf16Length;
+ return utf16Name;
+ case gr_utf32:
+ {
+ utf32::codeunit_t * uniBuffer = gralloc<utf32::codeunit_t>(utf16Length + 1);
+ if (!uniBuffer)
+ {
+ free(utf16Name);
+ languageId = 0;
+ length = 0;
+ return NULL;
+ }
+ utf32::iterator d = uniBuffer;
+ for (utf16::const_iterator s = utf16Name, e = utf16Name + utf16Length; s != e; ++s, ++d)
+ *d = *s;
+ length = d - uniBuffer;
+ uniBuffer[length] = 0;
+ free(utf16Name);
+ return uniBuffer;
+ }
+ }
+ free(utf16Name);
+ languageId = 0;
+ length = 0;
+ return NULL;
+}
+
+uint16 NameTable::getLanguageId(const char * bcp47Locale)
+{
+ size_t localeLength = strlen(bcp47Locale);
+ uint16 localeId = m_locale2Lang.getMsId(bcp47Locale);
+ if (m_table && (be::swap<uint16>(m_table->format) == 1))
+ {
+ const uint8 * pLangEntries = reinterpret_cast<const uint8*>(m_table) +
+ sizeof(TtfUtil::Sfnt::FontNames)
+ + sizeof(TtfUtil::Sfnt::NameRecord) * ( be::swap<uint16>(m_table->count) - 1);
+ uint16 numLangEntries = be::read<uint16>(pLangEntries);
+ const TtfUtil::Sfnt::LangTagRecord * langTag =
+ reinterpret_cast<const TtfUtil::Sfnt::LangTagRecord*>(pLangEntries);
+ if (pLangEntries + numLangEntries * sizeof(TtfUtil::Sfnt::LangTagRecord) <= m_nameData)
+ {
+ for (uint16 i = 0; i < numLangEntries; i++)
+ {
+ uint16 offset = be::swap<uint16>(langTag[i].offset);
+ uint16 length = be::swap<uint16>(langTag[i].length);
+ if ((offset + length <= m_nameDataLength) && (length == 2 * localeLength))
+ {
+ const uint8* pName = m_nameData + offset;
+ bool match = true;
+ for (size_t j = 0; j < localeLength; j++)
+ {
+ uint16 code = be::read<uint16>(pName);
+ if ((code > 0x7F) || (code != bcp47Locale[j]))
+ {
+ match = false;
+ break;
+ }
+ }
+ if (match)
+ return 0x8000 + i;
+ }
+ }
+ }
+ }
+ return localeId;
+}
+
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