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<li><a href="http://HeeroYui.github.io/lutin">lutin</a></li>
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<li><a href="http://atria-soft.github.io/etk">etk</a></li>
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<li><a href="http://musicdsp.github.io/audio">audio</a></li>
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<li><a href="http://musicdsp.github.io/audio-drain">audio-drain</a></li>
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<li><a href="http://musicdsp.github.io/audio-orchestra">audio-orchestra</a></li>
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<div class="title">EWOL: Bases </div> </div>
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<div class="toc"><h3>Table of Contents</h3>
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<ul><li class="level1"><a href="#ewol_page_bases_overview">Overview: </a></li>
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<li class="level1"><a href="#ewol_page_bases_require">User requires: </a></li>
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<li class="level1"><a href="#ewol_page_bases_architecture">Architecture: </a></li>
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<div class="textblock"><h1><a class="anchor" id="ewol_page_bases_overview"></a>
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Overview: </h1>
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<p>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. 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.</p>
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<p><b>APACHE-2 license limitation:</b> I limit myself to use only Apache2 / MIT / BSD / PNG licencing to permit to release binary on IOs. This I a big point, because it need to rewrite many libraries (like SVG...).</p>
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<p>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.</p>
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<h1><a class="anchor" id="ewol_page_bases_require"></a>
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User requires: </h1>
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<p>To use ewol you need to know only C++ language. It could be usefull to know:</p><ul>
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<li><b>Python</b> for <a href="http://HeeroYui.github.io/lutin">lutin</a> build tool.</li>
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<li><b>git</b> and <b>repo</b> for all version management.</li>
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<li><b>OpenGL-ES2</b> if you want to create custum advanced widget.</li>
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</ul>
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<p>If you just want to have an interface of the openGl just refer to the <a href="http://atria-soft.github.io/gale">gale library</a></p>
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<p>Ewol does not manage the Audio but it is full integrated in <a href="http://musicdsp.github.io/audio-river">audio-river library</a>.</p>
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<h1><a class="anchor" id="ewol_page_bases_architecture"></a>
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Architecture: </h1>
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<p>One of the important point to know in this framework is some of absurd things came from the multiple architecture type.</p>
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<p>I will Explain the main points:</p><ul>
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<li>IOs does <b>NOT</b> simply support the shared object sub lib, this force ewol to be APACHE-2, and depend on some sub-library with small license restriction.</li>
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<li>Android have a JAVA main, then the application main will not be used with this platform</li>
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<li>Android event (keyboard, mouse, touch-screen and ...) will arrive in asynchron mode ==> need to be resynchronyse in one thread</li>
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<li>Only one graphyc framework is availlable on all platform. This is OpenGL (windows phone is not supported (moribund archi))</li>
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<li>Main interesting point is packaging of the application data:<ul>
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<li>Linux store it in /usr/share/applName/*</li>
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<li>MacOs store it in applName.app/subFolder/*</li>
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<li>Android store it in the .pkg that is a renamed .zip that the name is dynamic</li>
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<li>Windows (TODO : Never done a pakage) This will generate a complex result of data access...</li>
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</ul>
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</li>
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<li>Sub lib Change on all the platform, then 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. </li>
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