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This is a library for OpenGL to load PNG graphics files as an OpenGL texture as easily as possible. It also has a number of options for generating the alpha channel and mipmaps. It is implemented using modified versions of the LibPNG 1.0.2 and ZLib 1.1.3 libraries. This software is provided 'as-is', without any express or implied warranty. In no event will the author be held liable for any damages arising from the use of this software. Permission is hereby granted to use, copy, modify, and distribute this source code, or portions hereof, for any purpose, without fee, subject to the following restrictions: The origin of this source code 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. Altered versions must be plainly marked as such and must not be misrepresented as being the original source. This notice must not be removed or altered from any source distribution. Installation for MSDEV Copy glpng.h to your include/GL folder and copy glpng.lib and glpngd.lib to your lib folder. Then just do #include <GL/glpng.h> and with a bit of luck, MSDEV will automatically link with glpng.lib (release lib) or glpngd.lib (debug lib). Installation for Any Other Compiler Copy glpng.h to your include/GL folder. Then you'll have to build the library yourself with the included source code. Included are makefiles for Linux and SGI. If you need to modify the source code to make it work on your system, please get in contact so I can make future versions compatible. Compiling with LibPNG or ZLib If you are using LibPNG or ZLib in your project there may be problems if you link with the glpng library. To solve this, include glpng.c in your project and, if you're using MSDEV, modify glpng.h to not automatically link with glpng.lib or glpngd.lib. OpenGL DLL Dynamic Loading using glsetup To use glpng with glsetup, include glpng.c, LibPNG and ZLib in your project. In glpng.c, change #include <GL/gl.h> to include the glsetup include and modify glpng.h to not automatically link with glpng.lib or glpngd.lib.
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