I'm getting started developing with OpenGL ES on ARM/Linux, and I would like to draw something full-screen but don't know where to start.
I'm not developping on iPhone, nor Android. This is a Linux/OpenGL ES question.
I know it's possible to draw on the framebuffer with OpenGL ES without any library but I don't find any resources about that topic, could you help me?
Here is a tutorial showing how to use SDL in combination with OpenGL ES. It's for the OpenPandora platform, but since that runs Linux, it should be applicable on the desktop if you can get the proper library versions.
Use of SDL is more or less standard with this kind of programming, in Linux. You can of course go the longer route and open the window yourself, attach a GL rendering context and so on, but usually it's easier to learn the relevant parts of SDL. That also gives you easy-to-use API:s for input reading, which is almost always necessary.
I don't have any code to show how to do it but basicly you use de framebuffer device as the target of OpenGL|ES operations.
Don't forget that desktop Linux comes with OpenGL, not OpenGLES! They're similar but not quite compatible. If you want to do work on OpenGLES on a desktop Linux platform, ARM or otherwise, you'll need an OpenGLES emulator library. Sorry, can't recommend any, I'm looking for one myself.
OpenGLES just handles the process of drawing stuff into the window. You also need a windowing library, which handles the process of creating a window to draw stuff into, and an event library, which deals with input events coming back from the window.
SDL will provide both of the last two, as will a bunch of other libraries. Khronos themselves have standardised on EGL as the windowing library and OpenKODE as the event library... but I don't actually know where to get open source implementations of these for Linux. (I work for a company that does EGL and OpenKODE for embedded platforms, so I've never needed to find an open source version!)