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I am writing an OpenGL game which will hopefuflly be for both linux and iphoneOS, I basically want to be able to build using the OpenGL ES 1.5 headers and run it on my linux desktop. Can I do this? IE, I want to only use the subset of API calls common between OpenGL and OpenGL-ES.
Doing the above and linking with normal libGL.a from my system gets me my screen but I seem to be able to do nothing but change the scene background colour.
I’ve done exactly that, and it worked well for me.
There are a bunch OpenGL|ES extensions that aren’t available on standard OpenGL but very nice to have on a low spec platform. glDrawTexImage is such an extension. Emulating these extensions using a hand full of desktop OpenGL-calls is not a big deal though.
Also OpenGL|ES supports the fixed-point data-format for most entrypoints. Take glClearColorx for example. These aren’t available for the desktop OpenGL, so you have to write a wrapper if you want to use them. It’s a bit more work if you also store your vertex data in this format.
Oh – and note that OpenGL|ES does not come with the glu-library. You can use it on the desktop, but if you do you’ll have to reimplement them later (see the 100 questions about gluLookAt and gluUnproject).