commit 6307e2e

Cache sprite flags

 1@@ -599,24 +599,28 @@ screen_deo_sprite(void)
 2 	const int ctrl = dev[0x2f];
 3 	const int blend = ctrl & 0xf;
 4 	const int opaque = blend % 5;
 5-	const int flipx = ctrl & 0x10, fx = flipx ? -1 : 1, qfx = flipx ? 0 : 7;
 6-	const int flipy = ctrl & 0x20, fy = flipy ? -1 : 1, qfy = flipy ? 7 : 0;
 7-	const int dyx = fx * rDY;
 8-	const int dxy = fy * rDX;
 9+	const int flipx = ctrl & 0x10;
10+	const int flipy = ctrl & 0x20;
11 	const int layer_mask = (ctrl & 0x40) ? 0x3 : 0xc;
12 	const Uint8 *table = (ctrl & 0x40) ? blending[blend][1] : blending[blend][0];
13 	const int is_2bpp = (ctrl & 0x80) != 0;
14 	const int addr_incr = rMA << (is_2bpp ? 2 : 1);
15 	const int stride = screen_wmar2;
16-	for(i = 0; i <= rML; i++, x += dyx, y += dxy, rA += addr_incr) {
17+	const int dx = flipx ? -rDY : rDY;
18+	const int dy = flipy ? -rDX : rDX;
19+	const int qfx = flipx ? 0 : 7;
20+	const int qfy = flipy ? 7 : 0;
21+	const int qx_step = flipx ? 1 : -1;
22+	const int src_stride = flipy ? -1 : 1;
23+	for(i = 0; i <= rML; i++, x += dx, y += dy, rA += addr_incr) {
24 		const Uint16 x0 = x + 8, y0 = y + 8;
25 		if(x0 + 8 >= stride || y0 + 8 >= screen_hmar2) continue;
26 		Uint8 *dst = &screen_layers[x0 + y0 * stride];
27 		const Uint8 *src = &ram[rA + qfy];
28-		for(row = 0; row < 8; row++, dst += stride, src += fy) {
29-			int qx = qfx;
30+		for(row = 0; row < 8; row++, dst += stride, src += src_stride) {
31 			const int ch1 = *src, ch2 = is_2bpp ? (src[8] << 1) : 0;
32-			for(px = 0; px < 8; px++, qx -= fx) {
33+			int qx = qfx;
34+			for(px = 0; px < 8; px++, qx += qx_step) {
35 				int color = ((ch1 >> qx) & 1) | ((ch2 >> qx) & 2);
36 				if(opaque || color)
37 					dst[px] = (dst[px] & layer_mask) | table[color];
38@@ -624,14 +628,14 @@ screen_deo_sprite(void)
39 		}
40 	}
41 	if(!screen_reqdraw) {
42-		int x1 = (fx < 0) ? x : rX;
43-		int x2 = (fx < 0) ? rX : x;
44-		int y1 = (fy < 0) ? y : rY;
45-		int y2 = (fy < 0) ? rY : y;
46+		int x1 = flipx ? x : rX;
47+		int x2 = flipx ? rX : x;
48+		int y1 = flipy ? y : rY;
49+		int y2 = flipy ? rY : y;
50 		screen_change(x1 - 8, y1 - 8, x2 + 8, y2 + 8);
51 	}
52-	if(rMX) rX += rDX * fx;
53-	if(rMY) rY += rDY * fy;
54+	if(rMX) rX += flipx ? -rDX : rDX;
55+	if(rMY) rY += flipy ? -rDY : rDY;
56 }
57 
58 /* clang-format off */