commit 4a0607f

Draw flipx using static values

 1@@ -524,9 +524,8 @@ screen_deo_sprite(void)
 2 	const int ctrl = dev[0x2f];
 3 	const int flipx = ctrl & 0x10, dx = flipx ? -rDY : rDY;
 4 	const int flipy = ctrl & 0x20, dy = flipy ? -rDX : rDX;
 5-	const int row_start = flipx ? 0 : 7, row_delta = flipx ? 1 : -1;
 6-	const int col_start = flipy ? 7 : 0, col_delta = flipy ? -1 : 1;
 7 	const int layer = ctrl & 0x40, layer_mask = layer ? 0x3 : 0xc;
 8+	const int row_step = flipy ? -1 : 1, row_start = flipy ? 7 : 0;
 9 	const int is_2bpp = ctrl >> 7;
10 	const int addr_incr = rMA << (is_2bpp + 1);
11 	const int blend = ctrl & 0xf;
12@@ -536,15 +535,19 @@ screen_deo_sprite(void)
13 		const Uint16 x0 = x + 8, y0 = y + 8;
14 		if(x0 + 8 >= screen_wmar2 || y0 + 8 >= screen_hmar2) continue;
15 		Uint8 *dst = screen_layers + y0 * screen_wmar2 + x0;
16-		const Uint8 *col = &ram[rA + col_start];
17-		for(j = 0; j < 8; j++, dst += screen_wmar2, col += col_delta) {
18-			Uint8 *d = dst;
19-			const int ch1 = *col, ch2 = is_2bpp ? col[8] : 0;
20-			for(int k = 0, row = row_start; k < 8; k++, d++, row += row_delta) {
21-				const int color = ((ch1 >> row) & 1) | (((ch2 >> row) & 1) << 1);
22-				if(opaque_mask || color)
23-					*d = (*d & layer_mask) | table[color];
24-			}
25+		const Uint8 *rowptr = &ram[rA + row_start];
26+		for(j = 0; j < 8; j++, dst += screen_wmar2, rowptr += row_step) {
27+			Uint8 *d = dst, bits1 = rowptr[0], bits2 = is_2bpp ? rowptr[8] : 0;
28+			if(flipx)
29+				for(int k = 0; k < 8; k++, d++, bits1 >>= 1, bits2 >>= 1) {
30+					const int color = (bits1 & 1) | ((bits2 << 1) & 2);
31+					if(opaque_mask || color) *d = (*d & layer_mask) | table[color];
32+				}
33+			else
34+				for(int k = 0; k < 8; k++, d++, bits1 <<= 1, bits2 <<= 1) {
35+					const int color = (bits1 >> 7) | ((bits2 >> 6) & 2);
36+					if(opaque_mask || color) *d = (*d & layer_mask) | table[color];
37+				}
38 		}
39 	}
40 	if(!screen_reqdraw) {