This document discusses CyberLink's Koan engine, which is a Python-based UI framework that allows for rapid development of cross-platform applications. The Koan engine provides layout, controls, and rendering capabilities to applications like PowerDVD, PowerCinema, PhotoDirector, and others. It uses Python for its simplicity and flexibility for development, along with C++ for performance critical components, to deliver responsive and smooth user experiences across different operating systems and graphics APIs.

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CyberLink Meets Python
Honder Tzou <honder@cyberlink.com>
Chief Architect
訊連科技
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PowerDVD
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PowerDVD Linux
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PowerCinema
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PowerCinema Linux
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PhotoDirector
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PhotoDirector Mac
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Agenda
The engine behind these applications
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Back to 2003…
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Motivation
• Rapid Development
– Simple
– Flexible
• Cross Platform
– Maximizing productivity
• Immersive User Experience
– High performance animated UI elements
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Koan Engine
• UI Framework
• Based on Python language
• Scriptable
• Cross Platform
• Cross Graphics API
• Parametric and programmatic UI
• Specialized Features
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Python
• Cross Platform
• Scripting and Typeless
• Unicode Support
• Rich libraries
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Architecture
Application
Python
Layout Controls KXML
Application Kernels
Framework Core
Composition Engine
C++
OS
D3D Application DLLs
Services GDI OpenGL
7/9/11
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Design Challenges
100ms & 16ms
UI Responsiveness and Smoothness
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Rendering Architecture
UI Thread Render Thread
Render Commands Render Commands
eventHandler
Swap
updateDraw IO Thread
Resources
Prefetch
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Summary
• Simple and Accessible
• Easy to Extend
• Maximized Productivity
• Programming is FUN
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Thank you
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