static void present_view_with_post_processing(void){
glBindFramebuffer( GL_FRAMEBUFFER, 0 );
glViewport( 0,0, vg.window_x, vg.window_y );
static void present_view_with_post_processing(void){
glBindFramebuffer( GL_FRAMEBUFFER, 0 );
glViewport( 0,0, vg.window_x, vg.window_y );