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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
/*
* This code is based on the original source code of Lord Avalot d'Argent version 1.3.
* Copyright (c) 1994-1995 Mike, Mark and Thomas Thurman.
*/
#include "graph.h"
namespace Avalanche {
enum flavourtype {ch_ega, ch_bgi, last_flavourtype};
struct chunkblocktype {
flavourtype flavour;
integer x, y;
integer xl, yl;
longint size;
boolean natural;
boolean memorise; /* Hold it in memory? */
};
untyped_file f;
longint offset;
chunkblocktype ch;
integer gd, gm;
byte bit;
pointer p;
void mdrop(integer x, integer y, integer xl, integer yl, pointer p) /* assembler;
asm
push ds; { Strictly speaking, we shouldn't modify DS, so we'll save it.}
push bp; { Nor BP! }
{ DI holds the offset on this page. It starts at the top left-hand corner. }
{ (It should equal ch.y*80+ch.x. }
mov ax,y;
mov dl,80;
mul dl; { Line offset now calculated. }
mov di,ax; { Move it into DI. }
mov ax,x;
add di,ax; { Full offset now calculated. }
mov bx,yl; { No. of times to repeat lineloop. }
inc bx; { "loop" doesn't execute the zeroth time. }
mov bh,bl; { Put it into BH. }
{ BP holds the length of the string to copy. It's equal to ch.xl.}
mov ax,word(p); { Data is held at DS:SI. }
mov si,ax;
mov ax,word(p+2); { This will be moved over into ds in just a tick... }
mov bp,xl;
mov ds,ax;
cld; { We're allowed to hack around with the flags! }
mov ax,$A000; { Top of the first EGA page. }
mov es,ax; { Offset on this page is calculated below... }
{ port[$3c4]:=2; port[$3ce]:=4; }
mov dx,$3c4;
mov al,2;
out dx,al;
mov dx,$3ce;
mov al,4;
out dx,al;
mov cx,4; { This loop executes for 3, 2, 1, and 0. }
mov bl,0;
@mainloop:
push di;
push cx;
{ port[$3C5]:=1 shl bit; }
mov dx,$3C5;
mov al,1;
mov cl,bl; { BL = bit. }
shl al,cl;
out dx,al;
{ port[$3CF]:=bit; }
mov dx,$3CF;
mov al,bl; { BL = bit. }
out dx,al;
xor ch,ch;
mov cl,bh; { BH = ch.yl. }
@lineloop:
push cx;
mov cx,bp;
repz movsb; { Copy the data. }
sub di,bp;
add di,80;
pop cx;
loop @lineloop;
inc bl; { One more on BL. }
pop cx;
pop di;
loop @mainloop;
pop bp;
pop ds; { Get DS back again. }
*/
{
}
int main(int argc, const char *argv[]) {
pio_initialize(argc, argv);
assign(f, "chunk21.avd");
reset(f, 1);
seek(f, 49);
blockread(f, offset, 4);
seek(f, offset);
blockread(f, ch, sizeof(ch));
gd = 3;
gm = 0;
initgraph(gd, gm, "c:\\bp\\bgi");
getmem(p, ch.size);
blockread(f, p, ch.size);
/* putimage(0,0,p^,0);*/
/* with ch do
for bit:=0 to 3 do
begin;
port[$3c4]:=2; port[$3ce]:=4; port[$3C5]:=1 shl bit; port[$3CF]:=bit;
for gm:=0 to yl do
blockread(f,mem[$A000*gm*80],(ch.xl+7) div 8);
end;*/
mdrop(ch.x, ch.y, ch.xl, ch.yl, p);
close(f);
return EXIT_SUCCESS;
}
} // End of namespace Avalanche.
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