// OpenGL code
Texture temp;
void debugSetTexture(Texture t)
{
    temp = t;
}

// Window resize handler
void graphicsWindowResize(int w, int h)
{
    glViewport(0, 0, w, h);
    glLoadIdentity();
}

float iasd = 0;
void graphicsDraw()
{
    // Prepare for 2d drawing
    glMatrixMode(GL_PROJECTION);
    glLoadIdentity();
    glOrtho(0, graphicsGetWindowSize().X, graphicsGetWindowSize().Y, 0, 0, 1);

    glMatrixMode(GL_MODELVIEW);
    glLoadIdentity();
    glTranslatef(.375f, .375f, 0);

    glClearColor(1, 1, 1, 1.0);
    glClear(GL_COLOR_BUFFER_BIT);


    glTranslatef(iasd, 0, 0);
    iasd += 0.1;
    if (iasd > 100) iasd = 0;


    glColor3d(.5, .6, 1);

    // Draw something:
    glBegin(GL_QUADS);
    glVertex2f(1.0f, 2.0f);
    glVertex2f(550.0f, 2.0f);
    glVertex2f(550.0f, 430.0f);
    glVertex2f(1.0f, 430.0f);
    glEnd();

    temp.enable();
    glColor3d(1, 1, 1);
    glBegin(GL_QUADS);
      glTexCoord2f(0, 0); glVertex3f(80.5, 180.5, 0);
      glTexCoord2f(1, 0); glVertex3f(180.5, 180.5, 0);
      glTexCoord2f(1, 1); glVertex3f(180.5, 80.5, 0);
      glTexCoord2f(0, 1); glVertex3f(80.5, 80.5, 0);
    glEnd();


    // Swap buffers
    glutSwapBuffers();
}

void graphicsMainLoop()
{
    // Now we need to create a new thread for gl main loop
        if (Fork()) {   // Main thread
            glutMainLoop();
        }

        else {  // Child thread
            return;
        }
}

void graphicsLoopFunction()
{
    glutPostRedisplay();
}

void grahpicsInit2D(int* argc, char** argv)
{
    // Initialize glut
    glutInit(argc, argv);
    glutInitWindowSize(DEFAULT_WINDOW_WIDTH, DEFAULT_WINDOW_HEIGHT);
    glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB | GLUT_MULTISAMPLE);
    glutCreateWindow("Hello world!");

    // Set up 2d mode
    glDisable(GL_DEPTH_TEST);
    glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
    glEnable(GL_BLEND);
    glEnable(GL_TEXTURE_2D);
    glShadeModel(GL_FLAT);
    glClearColor(1, 1, 1, 1.0);

    // More initialization
    glutDisplayFunc(graphicsDraw);
    glutReshapeFunc(graphicsWindowResize);
    glutIdleFunc(graphicsLoopFunction);

}