Projects tagged ‘c’ and ‘framebuffer’

Evas is a powerful canvas, the base of Enlightenment Foundation Libraries and the Enlightenment Window Manager (E17)

IntroductionV4P - Vectors For Pocket - is a minimalistic layered polygons scan-conversion engine. See http://en.wikipedia.org/wiki/Scanline_rendering if you don't understand what it deals with. V4P ... [More] consists in a ridiculously short piece of C code. V4P main engine weights ~1000 instructions. V4P targets very light platforms without advanced graphic processing hardware resources. V4P may be easily embedded in any GUI or Game development library or application. V4P has no dependencies with any other library. V4P even brings its own integer only maths routines. V4P only asks you to provide an horizontal line drawing function (a memset()-like function should work well in most cases). Beside rendering vectors scene, V4P will help you find collides. Design IntroductionThe underlying algorithm of V4P can be named: "Bresenham-like iterative scan-line and active edge cross-over computation based polygon scan conversion algorithm". Additionally, most V4P computed lists are smartly quick-sorted, while bit-based computation helps V4P to find collides and pixel highest owner. V4P design spares memory a lot. It doesn't deal with Z-buffer, not even "S-buffer" (as depicted here: http://www.gamedev.net/reference/articles/article668.asp). V4P has been developed and tested on a very old Sony Clie PDA with Palm OS 4 gcc based SDK. V4P should be able to be adapted with few tweakings on any embedded Linux devices and other geeky gadgets. Further experiments / What to do next?Actually, V4P is not a drawing engine. No span drawing function are provided. Except from the PDA experiment I've done. So... writing more span drawing functions# writing a Linux frame buffer port # write a SDL port # write a DirectFB port # write a DS Linux port Keep in mind the Color type is a pointer which may actually lead to a structure giving much more information about the way to fill up a polygon, eg. a pixmap. # simple anti-aliasing solution through rescaling trick writing other libraries on top of V4P# use V4P to design a Flash-like technology # use V4P as a basis for a full animated GUI stack adding featurestransparent polygonsthis feature needs a change in the pixel parent election code so to call the span drawing routine from the highest opaque polygon to the highest translucent polygon up there. adding other edge shapesI miss circular curves a lot. But I didn't find a way to draw them in a single pass algorithm. A simple Bezier discretisation algorithm may help. But has it to be in the core library? increasing z depth rangeonly 16 layers for now. Using a balanced binary tree of span parents could make z infinitively more precise. Use more accurate cos/sin/atan/dist routinesavoid refreshing the static parts of the scenean integrated solution need an in-depth rewrite an other solution may be to call the V4P engine repeatedly on "dirty rectangles". A top library could do that. [Less]

pxCoreUpdated July 19th 2009 pxCore is a small opensource library that provides a portable framebuffer and windowing abstraction for C++. This library is intended to hide the complexity of writing ... [More] rasterization code on multiple platforms and allows you to easily write the following sorts of things in a portable way. 2d and 3d rasterizers Transition Libraries Filter Routines Image Processing In its design a few principles were followed: Be Small – A simple windowed application can be built (on Windows) in as little as 8k. Be Simple – The framebuffer abstraction supports 32bpp framebuffers and is intended to be minimal yet complete. Don’t tightly couple the framebuffer and windowing functionality. Some other framebuffer libraries (PixelToaster for one) don’t separate out the framebuffer abstraction from the windowing abstraction. By loosely coupling the two abstractions this library becomes much more valuable; as the framebuffer functionality can be used and integrated with other windowing toolkits easily thereby making YOUR code more reusable. Platform native surface construction Policy free resizing support – No policy is baked into the window resizing support so that applications completely control their own resizing behavior. Portable Keyboard, Mouse and Window events Support for portable performance timers Basic Animation Support - Support for a basic animation timer event (frames per second) is built into the windowing abstraction making it easy to write applications that animate their contents. pxCore has been ported to Windows, pocketpc (arm4), linux(x11), OSX. Related Projects: pxCamera - Video Capture [Less]

The directvnc (VNC viewer using DirectFB for display) is a lightweight tool to connect to VNC hosts without running a Xwindow server. The original project ... [More] (http://savannah.nongnu.org/projects/directvnc) seems to have been abandoned by its creators. Here, it is attempted to revive the project. [Less]

fbcat grabs an image of a framebuffer and stores in a PPM file.

Elke is small portable frambuffer c/c++ library. Provides window events handling (keyboard, mouse), window/fullscreen mode. Utility module - primitive drawing, timer. Examples included.