Nguyen Huy Dung is a team leader at Gameloft HAN studio who loves exchanging knowledge and passion. The presentation discusses Gameloft's approach to multi-platform game development. Gameloft produces games for many platforms including iOS, Android, PS3 and more using a common codebase. This allows them to reduce bugs, maintenance effort and resources while only separating truly platform-specific code. Tips are provided such as using configuration files instead of hardcoding, preparing data wisely, and creating abstract libraries to handle platform differences.

2. Who am I
 Nguyen Huy Dung, Team Leader at
Gameloft HAN studio
 Love to exchange knowledge and passion.
Had several seminars and trainings in
Hanoi-Aptech, GameLoft, Universities.

3. Agenda
 Gameloft Introduction
 Gameloft’s approach to Multi-Platform
development
 Tips, tricks and examples
 Questions and Answers

4. Gameloft: Leading developer and publisher
Founded in 1999,
to develop from mobiles & smart phones
to cross-platform digital distribution
Iphone, Ipod, Ip Android
ad
Mobile
Console

5. Gameloft: Leading developer and publisher
Presence in over 80 countries
Agreements with over 200 carriers
~400,000 games sold per day

6. Gameloft: Leading developer and publisher
Production studios in 12 countries
5125 talented people

7. Gameloft Vietnam is The BIGGEST Gameloft Studio
Worldwide
The BIGGEST 1700 talented staffWorldwide
More than Gameloft Studio
More than 1000 talented staff

8. Gameloft keeps on growing fast in Vietnam
SAI 1 SAI 2 DAD HAN
e-Town 2 Building - 18A Cong Hoa, Tan 74 Bach Dang, Hai 3rd&4th floor –
7Fl., 364 Cong Hoa, Binh Dist., HCMC Chau Dist., Danang Lilama 10
Tan Binh Dist., Since Aug-2008 City Le Van Luong, Hanoi
HCMC Since Mar-2010 Since June-2011

9. Multi-platform to
Gameloft’s approach
development

10. Our games are running on
 iOS
 Android
 PS3
 Windows Phone 7
 bada
 WebOS
 Java embed
 ….

11. Our games are running on
 iOS
 Android
 PS3
 Windows Phone 7
 bada
 WebOS
 Java embed
…

12. How could we accomplished that?

13. How could we accomplished that?
Different codebases for each platform?

14. Different codebases for each platform?
Yes.

15. Different codebases for each platform?
Yes. And No 

16. Windows Game
Platform Platform
Platform- API Platform- API
specific Wrapper specific Wrapper
Features Features
Platform- Platform-
specific specific
UI UI
Android Game iOS Game

17. Windows Game
Built with C++, contains almost everything:
UI Design
Game-Logic
Game Rendering
Sound
Multiplayer
…

18. Windows Game
Android Game iOS Game
Platform Platform
API API
Wrapper Wrapper
•Android NDK •C++ auto-compat
•Java wrapper: Activity, •UIWindow, UIViewController,
View, Intent, Receiver UIView,
UIApplicationDelegate

19. Windows Game
Android Game iOS Game
Platform Platform
Platform- API Platform- API
specific Wrapper specific Wrapper
Features Features
•Advertising •iAd
•In-App Billing •In-App Purchase
•Beam •Music Player

20. Windows Game
Android Game iOS Game
Platform Platform
Platform- API Platform- API
specific Wrapper specific Wrapper
Features Features
Platform- Platform-
specific specific
UI UI
•Push Notification toggle •iOS is normally the role-
•Kindle Fire Volume model
•Color Correction

21. Windows Game
Platform Platform
Platform- API Platform- API
specific Wrapper specific Wrapper
Features Features
Platform- Platform-
specific specific
UI UI
Android Game iOS Game

22. Advantages of Porting
 Big common code base: less bugs,
less maintainance effort, less human
resource
 Only the things that really platform-
specific are needed to be separated

23. How?
We built:
 Our own 3D engines and libraries
(Networking, Sound, UI, Debugger…)
which already support multi-platform
 Online System to centralize the
services: User profiles, Billing, Data
downloading, Multi player….
 Core Packages for general features in
each platform

24. Multi-platform support
plan ahead, not fix later

25. Tips and tricks
 Try to build your game without a real device
first
 Graphics: Use OpenGL ES 2.0
 Don’t hard-code. Do things explicitly. Have
separated Configuration files.
 Prepare your data wisely
 Preprocessing is not only for C++
 Keep an abstract macros/classes/library of
code that using platform-specific API or
behave differently on each platform

26. Examples –
Defines/Configuration
#ifdef OS_ANDROID
#define KEYCODE_BACK (4)
#define KEYCODE_UP (19)
#define KEYCODE_DOWN (20)
#define KEYCODE_LEFT (21)
#define KEYCODE_RIGHT (22)
#elif defined(WIN32)
#define KEYCODE_BACK (27)
#define KEYCODE_UP (38)
#define KEYCODE_DOWN (40)
#define KEYCODE_LEFT (37)
#define KEYCODE_RIGHT (39)
#endif

27. Examples – simple macro
#define PLATFORM_WIN32 1
#define PLATFORM_ANDROID 2
#define CONFIG_PLATFORM PLATFORM_WIN32
#if CONFIG_PLATFORM==PLATFORM_ANDROID
#include <android/log.h>
#define Log(...)
__android_log_print(ANDROID_LOG_INFO,
“GLGame",__VA_ARGS__)
#elif CONFIG_PLATFORM==PLATFORM_WIN32
#define Log(...)
printf(__VA_ARGS__);printf("n")
#else
#define Log(...)
#endif

28. Examples – Abstract Library
class TouchScreenBase { ... }
class TouchScreenMobile : public TouchScreenBase
{ ... }
class TouchScreenWin32 : public TouchScreenBase
{ ... }
#ifdef OS_ANDROID
typedef TouchScreen TouchScreenMobile
#elif defined(WIN32)
typedef TouchScreen TouchScreenWin32
#endif
//Usage: Just use TouchScreen Class

29. Examples – Abstract Library (2)
class TouchScreenBase { ... }
class TouchScreenMobile : public TouchScreenBase
{ ... }
class TouchScreenWin32 : public TouchScreenBase
{ ... }
//Usage: Cast to TouchScreenBase Class
#ifdef OS_ANDROID
TouchScreenBase* TS = new TouchScreenMobile()
#elif defined(WIN32)
TouchScreenBase* TS = new TouchScreenWin32()
#endif

30. Multi-platform support
plan ahead, not fix later

31. Questions and Answers
Thanks for your attention! Contact me:
dung.nguyenhuy@gameloft.com