Software rendered GL subset for text mode demos
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README.md

TextGL

This is a software-based opengl subset (which means it's not an opengl implementation, it just looks a bit like it).

This rendering engine was used in the TMDC winning demo "Litterae Finis".

The GL subset is based on TinyGL by Fabrice Bellard, with a few little changes;

  • Lots of code I did not need was torn out (like different output interfaces)
  • All rendering changed to 32 bit. Not everything is tested, so this change may still need work..
  • Mipmap support for textures
  • Non-standard gl extension to poke directly at texture data for demo purposes
  • Matrix math changed to use glm
  • Possibly other ugly changes that I don't recall right now

Demo

The demo source shows how to draw some 3d stuff with the textgl thingy, as well as how to poke directly at the "bitmap" framebuffer, how to turn that into ascii art with TextFX7, how to poke directly at the "text mode" framebuffer, and finally how to dump the result to console with TextFX7.

All in all, this should be more than enough for you to do some bitchin' text mode demos.

License

Copyright (c) 2013 Jari Komppa Based on TinyGL (C) 1997-1998 Fabrice Bellard under ZLib license

This software is provided 'as-is', without any express or implied warranty. In no event will the authors be held liable for any damages arising from the use of this software.

Permission is granted to anyone to use this software for any purpose, including commercial applications, and to alter it and redistribute it freely, subject to the following restrictions:

  1. The origin of this software must not be misrepresented; you must not claim that you wrote the original software. If you use this software in a product, an acknowledgment in the product documentation would be appreciated but is not required.

  2. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software.

  3. This notice may not be removed or altered from any source distribution.