#include <SDL/SDL.h>
#include <SDL/SDL_opengl.h>
#include <stdio.h>
#include <stdlib.h>

#undef main

int main(int argc, char **argv)
{
	SDL_Init(SDL_INIT_VIDEO);
	//SDL_GL_SetAttribute(SDL_GL_ACCELERATED_VISUAL, 0);
	SDL_Surface *screen = SDL_SetVideoMode(800, 600, 0, SDL_OPENGL);

	printf("Vendor: %s\n", glGetString(GL_VENDOR));
	printf("Renderer: %s\n", glGetString(GL_RENDERER));
	printf("Version: %s\n", glGetString(GL_VERSION));
	printf("Extensions: %s\n", glGetString(GL_EXTENSIONS));


	glScalef(1.0 / 32768, 1.0 / 32768, 1);

	const int array1size = 1024/8;
	short array1[array1size];

	for(int i=0; i < array1size; i++)
	{
		array1[i] = i * 23565 + 25782 + i * i * 2357;
	}

	while(true)
	{
		//usleep(20000);
		SDL_Event event;
		while(SDL_PollEvent(&event))
		{
			switch(event.type)
			{
			case SDL_QUIT:
				SDL_Quit();
				return 0;
				break;
			}
		}

		for(int i=0; i < array1size; i++)
			array1[i] += 1 + (i & 7) * 5;


		glVertexPointer(2, GL_SHORT, 0, array1);
		//glColorPointer(3, GL_UNSIGNED_BYTE, 0, array1);

		glColor4ub(10,10,10,1);

		//glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
		glBlendFunc(GL_ONE, GL_ONE);
		glEnable(GL_BLEND);

		glClear(GL_COLOR_BUFFER_BIT);
		glEnableClientState(GL_VERTEX_ARRAY);
		//glEnableClientState(GL_COLOR_ARRAY);

		glDrawArrays(GL_TRIANGLE_STRIP, 0, array1size / 2);
		glDisableClientState(GL_VERTEX_ARRAY);
		//glDisableClientState(GL_COLOR_ARRAY);



		// oops... missing SDL_GL_SwapBuffers();

	}
	return 0;
}