MorphOS/CybergraphX overlay modulo fix for E-UAE

e-uae_ovl.patch

Index: ami-win.c
===================================================================
--- ami-win.c	(revision 161)
+++ ami-win.c	(working copy)
@@ -147,7 +147,6 @@
 
 #ifdef USE_CGX_OVERLAY
 int use_overlay = 0;
-UWORD * vlayer_baseaddress = NULL;
 APTR VLHandle = NULL;
 BOOL attached=FALSE;
 BOOL Bilinear=TRUE;
@@ -581,8 +580,9 @@
 static void flush_block_cgx_overlay (struct vidbuf_description *gfxinfo, int first_line, int last_line)
 {
 	int x,y;
-	unsigned short * dst = NULL;
-	unsigned short * ptr;
+	unsigned char * dst = NULL;
+	unsigned char * ptr;
+	int modulo;
 	unsigned long  dstcolor;
 	unsigned short srccolor;
 	unsigned short color1, color2, color3, color4;
@@ -594,15 +594,16 @@
 */
 
 
-	dst = (unsigned short * ) LockAddress();
+	dst = LockAddress();
 	if (!dst)
 		return;
 
 	if (last_line  < 511)
 		last_line ++;
 
-	dst += first_line*gfxinfo->width;
+	modulo = GetVLayerAttr(VLHandle, VOA_Modulo);
 
+	dst += first_line*modulo;
 
 	for (y=first_line; y<last_line; y++)
 	{
@@ -623,10 +624,10 @@
 			color4=swapw(srccolor);
 
 			*((unsigned long long *) ptr) = (((unsigned long long)color1)<<48) | (((unsigned long long)color2)<<32) | (((unsigned long long)color3)<<16) | (color4);
-			ptr+=4;
+			ptr+=8;
 		}
 
-		dst+= gfxinfo->width;
+		dst+=modulo;
 	}
 
 	UnlockAddress();
@@ -655,21 +656,23 @@
 		else
 		{
 			int x,y;
-			unsigned short *dst = LockAddress();
+			int modulo;
+			unsigned char * dst = LockAddress();
 			unsigned short * ptr;
 
 			if (dst)
 			{
+				modulo = GetVLayerAttr(VLHandle, VOA_Modulo);
 				for (y=0; y<gfxinfo->height; y++)
 				{
-					ptr = dst;
+					ptr = (unsigned short *)dst;
 
 					for (x=0; x<gfxinfo->width; x++)
 					{
 						*ptr++ = 0;
 					}
 
-					dst+= gfxinfo->width;
+					dst+= modulo;
 				}
 			}