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README.txt Copyright 2011 Pyarelal Knowles, under GNU LGPL (see LICENCE.txt) 1. INTRODUCTION =============== This program, lfb, implements a number of Layered Fragment Buffer techniques to demonstrate their performance. The important files are: main.cpp - LFB implementation usage lfbRender.frag - render to lfb lfbDisplay.frag - read from lfb (and resolve transparency) lfb.h/cpp/glsl - base LFB class uses lfbZero.vert uses sorting.glsl lfbLinear.h/cpp/glsl - Linearized LFB implementation uses prefixSums.h/cpp/vert uses lfbClear.vert lfbLinked.h/cpp/glsl - Linked List LFB implementation lfbPages.h/cpp/glsl - Linked Pages LFB implementation lfbBasic.h/cpp/glsl - Brute Force LFB implementation This demo uses pyarlib, which is a jumble of common, sometimes reusable, code. Pyarlib is provides an OpenGL demo framework with camera controls, GUI, profiling and a few other utilities such as shader management and preprocessing. Pyarlib is not directly related to the LFB code above and can be ignored. 2. COMPILING ============ Note: REQUIRES OpenGL 4.2 tested on NVIDIA GeForce 460, 560, 580 and Quadro 4000 The /lfb/vs2008/ and /lfb/vs2010/ directories contain visual studio solution and project files. The output, lfb.exe, is placed in /lfb/ Note that service pack 1 is needed for visual studio 2008. The /lfb/Makefile is linux only. Linux versions of library dependencies are not included and must be installed first. To swap between using SDL 1.2 and 1.3, alter "-lSDL13" in the Makefile and the line "#include <SDL13/SDL.h>" in /lfb/pyarlib/jeltz.h SDL 1.3 source can be found here: http://www.libsdl.org/hg.php 3. LICENSE ========== This program is distributed under the terms of the GNU LGPL license. See LICENSE.txt for details 4. CREDITS ========== This program uses the following libraries, unmodified: FreeType Copyright © 1996-2011 The FreeType Project (www.freetype.org). All rights reserved. David Turner, Robert Wilhelm, and Werner Lemberg. OpenGL Extension Wrangler (GLEW) Copyright (C) 2002-2007, Milan Ikits <milan ikitsieee org> Copyright (C) 2002-2007, Marcelo E. Magallon <mmagallodebian org> Copyright (C) 2002, Lev Povalahev All rights reserved. Simple DirectMedia Layer (SDL) Copyright (C) 1997-2011 Sam Lantinga <firstname.lastname@example.org> libpng Version 1.2.37 Copyright (c) 1998-2009 Glenn Randers-Pehrson Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc. zlib Copyright (C) 1995-2005 Jean-loup Gailly and Mark Adler OpenCTM Copyright (c) 2009-2010 Marcus Geelnard