1 files changed, 167 insertions, 0 deletions
diff --git a/xbmc/utils/FontUtils.cpp b/xbmc/utils/FontUtils.cpp
new file mode 100644
index 0000000..4abf510
--- /dev/null
+++ b/xbmc/utils/FontUtils.cpp
@@ -0,0 +1,167 @@
+/*
+ *  Copyright (C) 2022 Team Kodi
+ *  This file is part of Kodi - https://kodi.tv
+ *
+ *  SPDX-License-Identifier: GPL-2.0-or-later
+ *  See LICENSES/README.md for more information.
+ */
+
+#include "FontUtils.h"
+
+#include "FileItem.h"
+#include "StringUtils.h"
+#include "URIUtils.h"
+#include "filesystem/Directory.h"
+#include "filesystem/File.h"
+#include "filesystem/SpecialProtocol.h"
+#include "utils/CharsetConverter.h"
+#include "utils/log.h"
+
+#include <ft2build.h>
+
+#include FT_FREETYPE_H
+#include FT_SFNT_NAMES_H
+#include FT_TRUETYPE_IDS_H
+
+using namespace XFILE;
+
+namespace
+{
+// \brief Get font family from SFNT table entries
+std::string GetFamilyNameFromSfnt(FT_Face face)
+{
+  std::string familyName;
+
+  for (FT_UInt index = 0; index < FT_Get_Sfnt_Name_Count(face); ++index)
+  {
+    FT_SfntName name;
+    if (FT_Get_Sfnt_Name(face, index, &name) != 0)
+    {
+      CLog::LogF(LOGWARNING, "Failed to get SFNT name at index {}", index);
+      continue;
+    }
+
+    // Get the unicode font family name (format-specific interface)
+    // In properties there may be one or more font family names encoded for each platform.
+    // NOTE: we give preference to MS/APPLE platform data, then fallback to MAC
+    // because has been found some fonts that provide names not convertible MAC text to UTF8
+    if (name.name_id == TT_NAME_ID_FONT_FAMILY)
+    {
+      const std::string nameEnc{reinterpret_cast<const char*>(name.string), name.string_len};
+
+      if (name.platform_id == TT_PLATFORM_MICROSOFT ||
+          name.platform_id == TT_PLATFORM_APPLE_UNICODE)
+      {
+        if (name.language_id != TT_MAC_LANGID_ENGLISH &&
+            name.language_id != TT_MS_LANGID_ENGLISH_UNITED_STATES &&
+            name.language_id != TT_MS_LANGID_ENGLISH_UNITED_KINGDOM)
+          continue;
+
+        if (CCharsetConverter::utf16BEtoUTF8(nameEnc, familyName))
+          break; // Stop here to prefer the name given with this platform
+        else
+          CLog::LogF(LOGERROR, "Failed to convert the font name string encoded as \"UTF-16BE\"");
+      }
+      else if (name.platform_id == TT_PLATFORM_MACINTOSH && familyName.empty())
+      {
+        if (name.language_id != TT_MAC_LANGID_ENGLISH || name.encoding_id != TT_MAC_ID_ROMAN)
+          continue;
+
+        if (!CCharsetConverter::MacintoshToUTF8(nameEnc, familyName))
+          CLog::LogF(LOGERROR, "Failed to convert the font name string encoded as \"macintosh\"");
+      }
+      else
+      {
+        CLog::LogF(LOGERROR, "Unsupported font SFNT name platform \"{}\"", name.platform_id);
+      }
+    }
+  }
+  return familyName;
+}
+} // unnamed namespace
+
+std::string UTILS::FONT::GetFontFamily(std::vector<uint8_t>& buffer)
+{
+  FT_Library m_library{nullptr};
+  FT_Init_FreeType(&m_library);
+  if (!m_library)
+  {
+    CLog::LogF(LOGERROR, "Unable to initialize freetype library");
+    return "";
+  }
+
+  // Load the font face
+  FT_Face face;
+  std::string familyName;
+  if (FT_New_Memory_Face(m_library, reinterpret_cast<const FT_Byte*>(buffer.data()), buffer.size(),
+                         0, &face) == 0)
+  {
+    familyName = GetFamilyNameFromSfnt(face);
+    if (familyName.empty())
+    {
+      CLog::LogF(LOGWARNING, "Failed to get the unicode family name for \"{}\", fallback to ASCII",
+                 face->family_name);
+      // ASCII font family name may differ from the unicode one, use this as fallback only
+      familyName = std::string{face->family_name};
+      if (familyName.empty())
+        CLog::LogF(LOGERROR, "Family name missing in the font");
+    }
+  }
+  else
+  {
+    CLog::LogF(LOGERROR, "Failed to process font memory buffer");
+  }
+
+  FT_Done_Face(face);
+  FT_Done_FreeType(m_library);
+  return familyName;
+}
+
+std::string UTILS::FONT::GetFontFamily(const std::string& filepath)
+{
+  std::vector<uint8_t> buffer;
+  if (filepath.empty())
+    return "";
+  if (XFILE::CFile().LoadFile(filepath, buffer) <= 0)
+  {
+    CLog::LogF(LOGERROR, "Failed to load file {}", filepath);
+    return "";
+  }
+  return GetFontFamily(buffer);
+}
+
+bool UTILS::FONT::IsSupportedFontExtension(const std::string& filepath)
+{
+  return URIUtils::HasExtension(filepath, UTILS::FONT::SUPPORTED_EXTENSIONS_MASK);
+}
+
+void UTILS::FONT::ClearTemporaryFonts()
+{
+  if (!CDirectory::Exists(UTILS::FONT::FONTPATH::TEMP))
+    return;
+
+  CFileItemList items;
+  CDirectory::GetDirectory(UTILS::FONT::FONTPATH::TEMP, items,
+                           UTILS::FONT::SUPPORTED_EXTENSIONS_MASK,
+                           DIR_FLAG_NO_FILE_DIRS | DIR_FLAG_BYPASS_CACHE | DIR_FLAG_GET_HIDDEN);
+  for (const auto& item : items)
+  {
+    if (item->m_bIsFolder)
+      continue;
+
+    CFile::Delete(item->GetPath());
+  }
+}
+
+std::string UTILS::FONT::FONTPATH::GetSystemFontPath(const std::string& filename)
+{
+  std::string fontPath = URIUtils::AddFileToFolder(
+      CSpecialProtocol::TranslatePath(UTILS::FONT::FONTPATH::SYSTEM), filename);
+  if (XFILE::CFile::Exists(fontPath))
+  {
+    return CSpecialProtocol::TranslatePath(fontPath);
+  }
+
+  CLog::LogF(LOGERROR, "Could not find application system font {}", filename);
+  return "";
+}