Port of statesaver to C, new resolution for SDL port, fixed bilinear filter in GUI

zsnes/src/video/procvid.asm

@@ -1283,76 +1283,6 @@ DetermineNewest:
     determinenewhelp 9,'9'
     ret
 
-NEWSYM CapturePicture
-    pushad
-    mov esi,[vidbuffer]
-    add esi,288*2+16*2
-    mov edi,PrevPicture
-    mov edx,56
-.next
-    push esi
-    push edx
-    mov dx,1111011111011110b
-    cmp byte[newengen],0
-    je .noneweng2
-    cmp byte[nggposng],5
-    jne .noneweng2
-    mov dx,0111101111011110b
-.noneweng2
-    mov ecx,64
-.loop
-    mov ax,[esi]
-    mov bx,[esi+4]
-    and ax,dx
-    and bx,dx
-    shr ax,1
-    shr bx,1
-    add ax,bx
-    push ax
-    mov ax,[esi+288*2]
-    mov bx,[esi+4+288*2]
-    and ax,dx
-    and bx,dx
-    shr ax,1
-    shr bx,1
-    add bx,ax
-    pop ax
-    and ax,dx
-    and bx,dx
-    shr ax,1
-    shr bx,1
-    add ax,bx
-    mov [edi],ax
-    add esi,8
-    add edi,2
-    dec ecx
-    jnz .loop
-    pop edx
-    pop esi
-    add esi,288*2*4
-    dec edx
-    jnz near .next
-    cmp byte[newengen],0
-    je .noneweng
-    cmp byte[nggposng],5
-    jne .noneweng
-    mov edx,PrevPicture
-    mov ecx,64*56
-.loop2
-    mov ax,[edx]
-    mov bx,ax
-    and ax,0111111111100000b
-    and bx,0000000000011111b
-    shl ax,1
-    or bx,ax
-    mov [edx],bx
-    add edx,2
-    dec ecx
-    jnz .loop2
-.noneweng
-    popad
-    ret
-
 GetPicture:
     mov cl,[CurPictureVal]
     cmp [PrevPictureVal],cl

zsnes/src/video/procvidc.c

@@ -0,0 +1,63 @@
+/*
+Copyright (C) 1997-2005 ZSNES Team ( zsKnight, _Demo_, pagefault, Nach )
+
+http://www.zsnes.com
+http://sourceforge.net/projects/zsnes
+
+This program is free software; you can redistribute it and/or
+modify it under the terms of the GNU General Public License
+as published by the Free Software Foundation; either
+version 2 of the License, or (at your option) any later
+version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+
+
+extern unsigned int newengen, nggposng[2];
+extern unsigned short PrevPicture[64*56], *vidbuffer;
+
+void CapturePicture()
+{
+    unsigned short work1, work2, filter;
+    unsigned int i, j, offset, pppos=0;
+
+    if ((newengen & 0xFF) && ((nggposng[0] & 0xFF) == 5))
+    {
+	filter = 0x7BDE;	// 0111 1011 1101 1110
+    }
+    else
+    {
+	filter = 0xF7DE;	// 1111 0111 1101 1110
+    }
+
+    for (j=0 ; j<56 ; j++)
+    {
+	offset = 288+16+j*288*4;
+
+	for (i=0 ; i<64 ; i++)
+	{
+	    work1 = ((vidbuffer[offset] & filter)>>1) + ((vidbuffer[offset+2] & filter)>>1);
+	    work2 = ((vidbuffer[offset+288] & filter)>>1) + ((vidbuffer[offset+288+2] & filter)>>1);
+	    PrevPicture[pppos] = ((work1 & filter)>>1) + ((work2 & filter)>>1);
+	    offset += 4;
+	    pppos++;
+	}
+    }
+
+    if ((newengen & 0xFF) && ((nggposng[0] & 0xFF) == 5))
+    {
+	for (pppos=0 ; pppos<64*56 ; pppos++)
+	{
+	    PrevPicture[pppos] = ((PrevPicture[pppos] & 0x7FE0)<<1)|(PrevPicture[pppos] & 0x001F);
+	} // 0111 1111 1110 0000 and 0000 0000 0001 1111
+    }
+}