commit aa845f9

Made as many consts as I could in the sprite drawing

 1@@ -609,45 +609,36 @@ static const Uint8 blending[16][2][4] = {
 2 static void
 3 screen_deo_sprite(void)
 4 {
 5-	int i, x = rX, y = rY, layer_mask;
 6-	int fx, fy, qfx, qfy, dxy, dyx, row;
 7-	const Uint8 *table;
 8+	int i, row, px;
 9+	int x = rX, y = rY;
10 	const int ctrl = dev[0x2f];
11 	const int blend = ctrl & 0xf;
12 	const int opaque = blend % 5;
13-	if(ctrl & 0x10)
14-		fx = -1, qfx = 0, dyx = -rDY;
15-	else
16-		fx = 1, qfx = 7, dyx = rDY;
17-
18-	if(ctrl & 0x20)
19-		fy = -1, qfy = 7, dxy = -rDX;
20-	else
21-		fy = 1, qfy = 0, dxy = rDX;
22-	if(ctrl & 0x40)
23-		layer_mask = 0x3, table = blending[blend][1];
24-	else
25-		layer_mask = 0xc, table = blending[blend][0];
26+	const int fx = (ctrl & 0x10) ? -1 : 1;
27+	const int fy = (ctrl & 0x20) ? -1 : 1;
28+	const int qfx = (ctrl & 0x10) ? 0 : 7;
29+	const int qfy = (ctrl & 0x20) ? 7 : 0;
30+	const int dyx = fx * rDY;
31+	const int dxy = fy * rDX;
32+	const int layer_mask = (ctrl & 0x40) ? 0x3 : 0xc;
33+	const Uint8 *table = (ctrl & 0x40) ? blending[blend][1] : blending[blend][0];
34 	const int is_2bpp = (ctrl & 0x80) != 0;
35 	const int addr_incr = rMA << (is_2bpp ? 2 : 1);
36 	const int stride = screen_wmar2;
37 	for(i = 0; i <= rML; i++, x += dyx, y += dxy, rA += addr_incr) {
38-		const Uint16 xmar = x + 8, ymar = y + 8;
39-		const Uint16 xmar2 = x + 16, ymar2 = y + 16;
40-		if(xmar2 == xmar + 8 && ymar2 == ymar + 8 && xmar2 < stride && ymar2 < screen_hmar2) {
41-			Uint8 *dst = &screen_layers[xmar + ymar * stride];
42-			const Uint8 *sch1 = &ram[rA + qfy];
43-			const Uint8 *sch2 = is_2bpp ? sch1 + 8 : NULL;
44-			for(row = 0; row < 8; row++, dst += stride, sch1 += fy, sch2 += fy) {
45-				int qx = qfx;
46-				int ch1 = *sch1;
47-				int ch2 = is_2bpp ? (*sch2 << 1) : 0;
48-				int px;
49-				for(px = 0; px < 8; px++, qx -= fx) {
50-					int color = ((ch1 >> qx) & 1) | ((ch2 >> qx) & 2);
51-					if(opaque || color)
52-						dst[px] = (dst[px] & layer_mask) | table[color];
53-				}
54+		const Uint16 x0 = x + 8, y0 = y + 8;
55+		if(x0 + 8 >= stride || y0 + 8 >= screen_hmar2) continue;
56+		Uint8 *dst = &screen_layers[x0 + y0 * stride];
57+		const Uint8 *sch1 = &ram[rA + qfy];
58+		const Uint8 *sch2 = is_2bpp ? sch1 + 8 : NULL;
59+		for(row = 0; row < 8; row++, dst += stride, sch1 += fy, sch2 += fy) {
60+			int qx = qfx;
61+			int ch1 = *sch1;
62+			int ch2 = is_2bpp ? (*sch2 << 1) : 0;
63+			for(px = 0; px < 8; px++, qx -= fx) {
64+				int color = ((ch1 >> qx) & 1) | ((ch2 >> qx) & 2);
65+				if(opaque || color)
66+					dst[px] = (dst[px] & layer_mask) | table[color];
67 			}
68 		}
69 	}