[fpc-pascal] OpenGL and SDL frustrations

[Ryan Joseph]

> On May 25, 2017, at 7:02 PM, Anthony Walter <sysrpl at gmail.com> wrote:
> 
> Ryan,
> 
> Are you loading the OpenGL API functions using SDL_GL_GetProcAddress? You really should be doing that or you're asking for problems.
> 
> Anyways, if you want maximum capability you should probably use ES version 2, as it's supported on the most devices. It requires you to drop the fixed function pipeline, that is dropping glBegin/glEnd and using GLSL vertex and fragment shaders. It's mostly like OpenGL 2.0, with a few differences, like there is no glMatrixMode.
> 

I loaded the functions using Load_GL_VERSION_3_3 (and similar) from the Free Pascal RTL and it seems to correctly load the functions.

Right now I’m using 2.1 and the fixed pipeline because I don’t really need shaders but I’m learning shaders and matrix transforms now so if there’s any performance benefit I can update my code base.

Regards,
	Ryan Joseph