commit d241ce1

Implement the new sprite flipping with reverse direction.

 1@@ -38,6 +38,9 @@ set corresponds to newer behaviour, generally.
 2 * bit0 = clear if drawing sprites with colour mode 0 is opaque, or set if
 3 it is transparent.
 4 
 5+* bit1 = set if flipping will reverse the direction of auto advancement
 6+when drawing sprites.
 7+
 8 Other bits are currently unused.
 9 
10 

 1@@ -233,7 +233,7 @@ static Uint8 layers;
 2 static Uint8 palet=7;
 3 static Uint8 touch_mode=0;
 4 static SDL_cond*stdin_cond;
 5-static Uint8 screencompat=0x01;
 6+static Uint8 screencompat=0x03;
 7 
 8 static Uint16 scriptc;
 9 static Script*scriptv;
10@@ -724,7 +724,7 @@ static void draw_sprite(Uint16 x,Uint16 y,Uint16 addr,Uint8 v) {
11 }
12 
13 static void screen_out(Device*dev,Uint8 id) {
14-  int i;
15+  int i,fx,fy;
16   Uint16 w;
17   Uint16 x=GET16(dev->d+8);
18   Uint16 y=GET16(dev->d+10);
19@@ -758,12 +758,14 @@ static void screen_out(Device*dev,Uint8 id) {
20       if(size_changed) set_screen_mode(scr_w,scr_h);
21       picture_changed=1;
22       w=GET16(dev->d+12);
23+      fx=((z&0x10)&&(screencompat&0x02)?-8:8);
24+      fy=((z&0x20)&&(screencompat&0x02)?-8:8);
25       for(i=0;i<=(dev->d[6]>>4);i++) {
26-        draw_sprite(x+i*(dev->d[6]&0x02?8:0),y+i*(dev->d[6]&0x01?8:0),w,z);
27+        draw_sprite(x+i*(dev->d[6]&0x02?fx:0),y+i*(dev->d[6]&0x01?fy:0),w,z);
28         if(dev->d[6]&0x04) w+=z&0x80?16:8;
29       }
30-      if(dev->d[6]&0x01) PUT16(dev->d+8,x+8);
31-      if(dev->d[6]&0x02) PUT16(dev->d+10,y+8);
32+      if(dev->d[6]&0x01) PUT16(dev->d+8,x+fx);
33+      if(dev->d[6]&0x02) PUT16(dev->d+10,y+fy);
34       if(dev->d[6]&0x04) PUT16(dev->d+12,w);
35       break;
36   }