Telegram Desktop – Official Messenger

This is the complete source code and the build instructions for the alpha version of the official desktop client for the Telegram messenger, based on the Telegram API and the MTProto secure protocol.

The source code is published under GPLv3 with OpenSSL exception, the license is available here.

Supported systems

• Windows XP - Windows 10 (not RT)
• Mac OS X 10.8 - Mac OS X 10.10
• Mac OS X 10.6 - Mac OS X 10.7 (separate build)
• Ubuntu 12.04 - Ubuntu 14.04
• Fedora 22

Third-party libraries

• Qt 5.3.2 and 5.5.1, slightly patched (LGPL)
• OpenSSL 1.0.1g (OpenSSL License)
• zlib 1.2.8 (zlib License)
• libexif 0.6.20 (LGPL)
• LZMA SDK 9.20 (public domain)
• liblzma (public domain)
• Google Breakpad (License)
• Google Crashpad (Apache License 2.0)
• OpenAL Soft (LGPL)
• Opus codec (BSD license)
• FFmpeg (LGPL)
• Open Sans font (Apache License 2.0)

Build instructions

• Visual Studio 2015
• XCode 7
• XCode 7 for OS X 10.6 and 10.7
• Qt Creator 3.5.1 Ubuntu

Projects in Telegram solution

• Telegram

  Telegram Desktop messenger

• Updater

  A little app, that is launched by Telegram when update is ready, replaces all files and launches it back.

• Packer

  Compiles given files to single update file, compresses it with lzma and signs with a private key. It is not built in Debug and Release configurations of Telegram solution, because private key is inaccessible.

• MetaEmoji

  Creates four sprites and text2emoji replace code

  • SourceFiles/art/emoji.png
  • SourceFiles/art/emoji_125x.png
  • SourceFiles/art/emoji_150x.png
  • SourceFiles/art/emoji_200x.png
  • SourceFiles/art/emoji_250x.png
  • SourceFiles/gui/emoji_config.cpp

• MetaStyle

  From two files and two sprites

  • Resources/style_classes.txt
  • Resources/style.txt
  • SourceFiles/art/sprite.png
  • SourceFiles/art/sprite_200x.png

  Creates two other sprites, four sprite grids and style constants code

  • SourceFiles/art/sprite_125x.png
  • SourceFiles/art/sprite_150x.png
  • SourceFiles/art/grid.png
  • SourceFiles/art/grid_125x.png
  • SourceFiles/art/grid_150x.png
  • SourceFiles/art/grid_200x.png
  • GeneratedFiles/style_classes.h
  • GeneratedFiles/style_auto.h
  • GeneratedFiles/style_auto.cpp

• MetaLang

  Creates from languagepack file Resources/lang.txt language constants code and language file parse code:

  • GeneratedFiles/lang.h
  • GeneratedFiles/lang.cpp