EWOL: Bases

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Overview:

EWOL is an OpenGL library for creating graphical user interfaces. It works on many UNIX-like platforms, Windows, and OS X and some mobile platforms Android, iOs(soon). EWOL is released under the APACHE-2 license, which allows for very flexible licensing of client applications. EWOL has a C++ architecture that allows for maximum flexibility.
The main idea of EWOL is to create a complete abstraction of the platforms. This generate some restriction that you will see an overwiew in the under section.

User requires:

To use ewol you need to know only C++ language. It could be usefull to know:

• Python for all build tool.
• git for all version management
• OpenGL-ES2 if you want to create custum advenced widget.

Architecture:

One of the important point to know in this framwork is some of absurd things came from the multiple architecture type.
I will Explain the main points:

• IOs does NOT simply support the shared object sub lib, this force ewol to be APACHE-2, and depend on some sub-library with small license restriction.
• Android have a JAVA main, then the application main will not be used with this platform
• Android event (keyboard, mouse, touch-screen and ...) will arrive in asynchron mode ==> need to be resynchronyse in one thread
• Only one graphyc framework is availlable on all platform. This is OpenGL
• Main interesting point is packaging of the application data:
• Linux store it in /usr/share/applName/*
• MacOs store it in applName.app/subFolder/*
• Android store it in the .pkg that is a renamed .zip that the name is dynamic
• Windows (TODO : Never done a pakage)
This will generate a complex result of data access...
• Sub lib Change on all the platform, the I will use the idea of Apple, that incluse in a package all needed libs. This could be a problem for small platform, but this framwork need to have a OpenGL-ES2 instance then the memory problem, is not really a problem.