+static void make_bg(int no_scale)
+{
+ unsigned short *src = (void *)g_menubg_src_ptr;
+ int w = g_screen_width, h = g_screen_height;
+ short *dst;
+ int x, y;
+
+ if (src == NULL) {
+ memset(g_menubg_ptr, 0, g_menuscreen_w * g_menuscreen_h * 2);
+ return;
+ }
+
+ if (!no_scale && g_menuscreen_w / w >= 2 && g_menuscreen_h / h >= 2)
+ {
+ unsigned int t, *d = g_menubg_ptr;
+ d += (g_menuscreen_h / 2 - h * 2 / 2)
+ * g_menuscreen_w / 2;
+ d += (g_menuscreen_w / 2 - w * 2 / 2) / 2;
+ for (y = 0; y < h; y++, src += w, d += g_menuscreen_w*2/2) {
+ for (x = 0; x < w; x++) {
+ t = src[x];
+ t = ((t & 0xf79e)>>1) - ((t & 0xc618)>>3);
+ t |= t << 16;
+ d[x] = d[x + g_menuscreen_w / 2] = t;
+ }
+ }
+ return;
+ }
+
+ if (w > g_menuscreen_w)
+ w = g_menuscreen_w;
+ if (h > g_menuscreen_h)
+ h = g_menuscreen_h;
+ dst = (short *)g_menubg_ptr +
+ (g_menuscreen_h / 2 - h / 2) * g_menuscreen_w +
+ (g_menuscreen_w / 2 - w / 2);
+
+ // darken the active framebuffer
+ for (; h > 0; dst += g_menuscreen_w, src += g_screen_width, h--)
+ menu_darken_bg(dst, src, w, 1);
+}
+