commit 0446dca
neauoire
·
2023-08-05 16:59:25 +0000 UTC
parent 9737391
(screen.c) Faster sprite drawing
1 files changed,
+6,
-4
+6,
-4
1@@ -185,16 +185,18 @@ screen_deo(Uint8 *ram, Uint8 *d, Uint8 port)
2 Uint8 length = move >> 4;
3 Uint8 twobpp = !!(ctrl & 0x80);
4 Uint8 *layer = (ctrl & 0x40) ? uxn_screen.fg : uxn_screen.bg;
5+ Uint8 color = ctrl & 0xf;
6 Uint16 x = PEEK2(d + 0x8), dx = (move & 0x1) << 3;
7 Uint16 y = PEEK2(d + 0xa), dy = (move & 0x2) << 2;
8- Uint16 addr = PEEK2(d + 0xc);
9+ Uint16 addr = PEEK2(d + 0xc), addr_incr = (move & 0x4) << (1 + twobpp);
10 int flipx = (ctrl & 0x10), fx = flipx ? -1 : 1;
11 int flipy = (ctrl & 0x20), fy = flipy ? -1 : 1;
12+ Uint16 dyx = dy * fx, dxy = dx * fy;
13 for(i = 0; i <= length; i++) {
14- screen_blit(layer, ram, addr, x + dy * i * fx, y + dx * i * fy, ctrl & 0xf, flipx, flipy, twobpp);
15- addr += (move & 0x4) << (1 + twobpp);
16+ screen_blit(layer, ram, addr, x + dyx * i, y + dxy * i, color, flipx, flipy, twobpp);
17+ addr += addr_incr;
18 }
19- screen_change(x, y, x + dy * length * fx + 8, y + dx * length * fy + 8);
20+ screen_change(x, y, x + dyx * length + 8, y + dxy * length + 8);
21 if(move & 0x1) POKE2(d + 0x8, x + dx * fx); /* auto x+8 */
22 if(move & 0x2) POKE2(d + 0xa, y + dy * fy); /* auto y+8 */
23 if(move & 0x4) POKE2(d + 0xc, addr); /* auto addr+length */