#include "surface.h" #include "dgl.h" #include extern SURFACE *backbuffer; // fill screen entirely with blue void test_surface_clear(void) { surface_clear(screen, 1); getch(); } // fill screen entirely with green, using the backbuffer first void test_surface_copy(void) { surface_clear(backbuffer, 2); surface_copy(backbuffer, screen); getch(); }