OpenGL

I am attempting to integrate OpenGL into the code, so that the game uses hardware graphics acceleration. Hopefully, this will improve some of the framerate issues.

I can compile a program using #include "SDL_opengl.h", but I am getting errors about missing functions when an OpenGL method is called.

I installed the OpenGL libraries in cygwin, so I'm not sure if those were necessary:

Installing these files may help

http://www.libsdl.org/extras/win32/cygwin/

Found out that I was using the wrong parameters to compile. I should have been using this:

gcc test.c `sdl-config --libs --cflags` -lglut32 -lglu32 -lopengl32

I got a simple square to display in OpenGL:

Added Tux:

Tux on an image background:

One of the vertices was off, which made the background skewed.