Fallout 1/2 windowed mode possible?

Skynet

Skynet

Mildly Dipped
There is a hack for a game called Trespasser that makes it run in windowed mode. The hack was done by modifying the DirectDraw settings. Since the Fallout 1/2 also uses DirectDraw, would this hack work for it also.

The hack was done by setting the main DirectDraw SetCooperativeLevel with a parameter of DDSCL_NORMAL instead of FULLSCREEN | EXCLUSIVE and removing the main call to SetDisplayMode (CreateWindowEx).


I cannot test this myself, cause I suck in hex editing. Could some hexedit wannabe test this?
 
The problem is finding the code with this parameter. We only see binary, so we won't see SetDisplayMode, and the DDSCL_NORMAL will be some number. I'd try it if I knew where to edit.

EDIT: here's the constant values for DDSCL flags.

Enum CONST_DDSCLFLAGS
DDSCL_ALLOWMODEX = 64
DDSCL_ALLOWREBOOT = 2
DDSCL_CREATEDEVICEWINDOW = 512
DDSCL_EXCLUSIVE = 16
DDSCL_FULLSCREEN = 1
DDSCL_MULTITHREADED = 1024
DDSCL_NORMAL = 8
DDSCL_NOWINDOWCHANGES = 4
DDSCL_SETDEVICEWINDOW = 256
DDSCL_SETFOCUSWINDOW = 128
End Enum
 
Skynet said:
http://fire.prohosting.com/tpasser/

Look at the MAIN CALLS TO DIRECTDRAW section under MISCELLANEOUS ADDRESSES

Is this info any of use? (should we contact the developer for help?)
Click to expand...

Yeah I found that page earlier. He mentions "Trespasser passes 0x00000011 as flags to this method, indicating it only uses the EXCLUSIVE and FULLSCREEN flags. "

I found 20 occurrances of this value in FO2 exe, but it may be the case that FO2 uses some other value (SetCooperativeMode parameters have multiple flags per the enumerated list I posted above). Also, he didn't say what he changed that value to in order to make it windowed mode.

It would be really interesting to find the SetDisplayMode params because those are setting the resolution.
 
FALLOUT2.EXE (Version 1.02 U.S) also passes 0x00000011 to the function, i believe this is what it kind of looks like with comments. One thing to be aware of is that I barely know anything about assembly or DirectX and just kind of guestimating some of this

Code: 
Address     Hex              Assembly                              My crappy explination 
 
004CAFDF    52               PUSH    EDX                           ;  / null 
004CAFE0    68 B0E25100      PUSH    FALLOUT2.0051E2B0             ;  | 
004CAFE5    52               PUSH    EDX                           ;  | null 
004CAFE6    FF15 28E45100    CALL    NEAR DWORD PTR DS:[51E428]    ;  \ DirectDrawCreate 
004CAFEC    85C0             TEST    EAX, EAX                      ;  if error... 
004CAFEE    0F85 AB010000    JNZ     FALLOUT2.004CB19F             ;     ... show error message 
004CAFF4    6A 08            PUSH    11                            ;  /  EXCLUSIVE | FULLSCREEN 
004CAFF6    8B1D 34E45100    MOV     EBX, DWORD PTR DS:[51E434]    ;  | 
004CAFFC    A1 B0E25100      MOV     EAX, DWORD PTR DS:[51E2B0]    ;  | 
004CB001    53               PUSH    EBX                           ;  | hWnd 
004CB002    8B10             MOV     EDX, DWORD PTR DS:[EAX]       ;  | 
004CB004    50               PUSH    EAX                           ;  | 
004CB005    FF52 50          CALL    NEAR DWORD PTR DS:[EDX+50]    ;  \ SetCooperativeLevel 
004CB008    85C0             TEST    EAX, EAX                      ;  if error... 
004CB00A    0F85 8F010000    JNZ     FALLOUT2.004CB19F             ;     ... show error message 
004CB010    56               PUSH    ESI                           ;  /  Colors ( 8 = 256 color? ) 
004CB011    55               PUSH    EBP                           ;  | Resolution Height 
004CB012    A1 B0E25100      MOV     EAX, DWORD PTR DS:[51E2B0]    ;  | 
004CB017    57               PUSH    EDI                           ;  | Resolution Width 
004CB018    8B10             MOV     EDX, DWORD PTR DS:[EAX]       ;  | 
004CB01A    50               PUSH    EAX                           ;  | 
004CB01B    FF52 54          CALL    NEAR DWORD PTR DS:[EDX+54]    ;  \ SetDisplayMode? 
004CB01E    85C0             TEST    EAX, EAX                      ;  if error... 
004CB020    0F85 79010000    JNZ     FALLOUT2.004CB19F             ;     ... show error message

looks like fallout supports resolutions up to 1024x1280 by default - chosen by this call statement which can be simply overridden to choose a different setting or make up your own setting. Changing the to call an exact location requires more space so I just removed the error checking for the call as you can see below which isn't too good at al, but whatever.

Code: 
Address    Hex           Assembly 
004D5D02   FF1424        CALL    NEAR DWORD PTR SS:[ESP] 
004D5D05   89C6          MOV     ESI, EAX 
004D5D07   83F8 FF       CMP     EAX, -1 
004D5D0A   74 05         JE      SHORT FALLOUT2.004D5D11 
004D5D0C   83F8 08       CMP     EAX, 8 
 
changed to very the nasty... 
 
004D5D02   E8 B550FFFF   CALL    FALLOUT2.004CADBC 
004D5D07   90            NOP 
004D5D08   90            NOP 
004D5D09   90            NOP 
004D5D0A   8BF0          MOV     ESI, EAX 
004D5D0C   83F8 08       CMP     EAX, 8


the only problem with the resolution changing is that the HUD is still in the 640x480 position and the chat dialogs are screwed up so you will get displays such as
http://www.jdoe407.com/images/scr00033.png
http://www.jdoe407.com/images/scr00036.png
http://www.jdoe407.com/images/scr00037.png
http://www.jdoe407.com/images/scr00038.png
 
jdoe407 said:
the only problem with the resolution changing is that the HUD is still in the 640x480 position and the chat dialogs are screwed up so you will get displays such as
http://www.jdoe407.com/images/scr00033.png
http://www.jdoe407.com/images/scr00036.png
http://www.jdoe407.com/images/scr00037.png
http://www.jdoe407.com/images/scr00038.png
Click to expand...


Temp solution would be like deleting all the hud graphics and the dialog mode graphics (result should be like a arcanum style dialog system!). Finding the hud position infos in EXE would be better.
 
Skynet said:
Temp solution would be like deleting all the hud graphics and the dialog mode graphics
Click to expand...

You'd have to make a new master.dat to delete those, and my guess is that the engine will crash if it doesn't find them.

Skynet said:
Finding the hud position infos in EXE would be better.
Click to expand...

Yeah if that could be moved it would be great, but its more than just the position of the interface, there's also the mouse click trapping code for each of the buttons. They are likely hardcoded to a specific place.

The 1280x1024 is probably too big ... I'd like to try 800x600.
 
dude_obj said:
You'd have to make a new master.dat to delete those, and my guess is that the engine will crash if it doesn't find them.
Click to expand...
Not neccessarily. You could just make them transparent. Don't know about the mouse click trapping though. It would make more sense if the mouse was "watched" in the area dynamically set by button position and size, instead of manual coordinates. Dunno. Disassembling is not my thing :scratch:.

dude_obj said:
The 1280x1024 is probably too big ... I'd like to try 800x600.
Click to expand...
Look at the pictures. They're clearly 1024x768 - 1024x1280 was a typo, IMO. And if the location of the resolution is known, then everyone can have their own, can't they?
 
Shadowbird said:
And if the location of the resolution is known, then everyone can have their own, can't they?
Click to expand...

whoops, forgot to post that part :/


Code: 
default is 256 colors, some assign it manually (such as 320x200) and others use the default function (such as 800x600) to gain 256 colors. The way I used to manually change the resolution may be causing errors or may cause errors in the future because I never really looked hard enough to find out what made the switch between these resolutions. I just figured 1024x768 would be as good as it gets until everything is too small to see (and its the resolution I use on just about everything). I can only test resolutions from 640x480 - 1024x768 because that's all my monitor supports in this list

004CAD08   ;320x200 @ 256 colors
004CAD24   ;320x240 @ 256 colors
004CAD40   ;320x400 @ 256 colors
004CAD64   ;640x480
004CAD78   ;640x480 @ 16bit color mode (don't think movies work)
004CAD94   ;640x400
004CADA8   ;800x600
004CADBC   ;1024x768
004CADD0   ;1280x1024

I would rather want to be able to reposition all the elements on the interface. For example, IFACE.frm (and all of its buttons and stuff) going down to the bottom center and having the inventory/save game/load game/etc screens center. This is probably too much work to do by manually editing the fallout2.exe - unless there is a shortcut somewhere

--edit--

it looks like the address of 004B9217 would probably be a better place to change the resolution at instead of removing the error checking in my frist post.

Code: 
address    hex                assembly

004B9217   8B049D BCDC5100    MOV EAX, DWORD PTR DS:[EBX*4+51DCBC]

change to the following ( where 004CADBC is changed to something in the list of resolutions above )

address    hex           assembly

004B9217   B8 BCAD4C00   MOV EAX, fallout2.004CADBC
004B921C   90            NOP
004B921D   90            NOP

the two NOP's because the original statement took up 14 bytes and the new statement (the one right above this text) only uses 10 bytes, so the last 4 bytes get 90 90
 
jdoe407 said:
address 004B9217
Click to expand...

I'm confused about the addresses you are listing. The hex offsets in my executable end at 1227FF (that's the last byte, file size 1189888 bytes). Why is your address 4B9217 way out of this range?

I managed to do your other hack by searching for occurance of code, and it displayed in 1024x768. And I can find this occurance in the exe too, but this change gives memory out of range errors.

So what's the deal with the address differences, and which version of the executable are you using? (US,UK,? and Version) Is yours 1189888 bytes?
 
my fallout.exe is also 1,189,888 bytes Version 1.02 U.S
I use ollydbg for all of my editing and such which is why all of the addresses differ from what you will see in a regular hex editor. http://home.t-online.de/home/Ollydbg/ "OllyDbg is a 32-bit assembler level analysing debugger for Windows-systems", in other words, its great for "hacking"/debugging programs. It can take a bit to get use to, but once you get the hang of it - everything is easier

http://www.jdoe407.com/images/odbg/ for an example of what to do ( was hoping to make a gif animation with words and all, but that didn't go too well )


Code: 
this is the address of 004B9217 that I was talking about in hex editor format

Address      Hex
000A9617     8B049DBCDC5100 

changed to

Address      Hex
000A9617     B8xxAD4C009090

Make sure to notice that the first two bytes were changed (From 8B to B8) because they look alike. Failure to change them will result in a crash

xx is replaced with...

08   for 320x200 @ 256 colors
24   for 320x240 @ 256 colors
40   for 320x400 @ 256 colors
64   for 640x480
78   for 640x480 @ 16bit color mode (don't think movies work)
94   for 640x400
A8   for 800x600
BC   for 1024x768
D0   for 1280x1024
 
Here's a 16-bit color mode shot with image from the troika game:

16bitcolor.jpg
 
ah nifty - I'm looking forward to that game. I don't think 16bit does anything more to the images because they were probably put into the game as 256 color images (or less)
 
jdoe407 said:
I'm looking forward to that game.
Click to expand...

Don't get too excited ... read the news forum ... troika is in trouble.

jdoe407 said:
I don't think 16bit does anything more to the images because they were probably put into the game as 256 color images (or less)
Click to expand...

It won't do anything for the existing images, but 16-bit mode would allow me to add new scenery of greater color depth, the above was a test to see how it looks. Now if I could figure out how to make those damn tile FRMs I could have entirely new background too.
 
jdoe407 said:
ah nifty - I'm looking forward to that game. I don't think 16bit does anything more to the images because they were probably put into the game as 256 color images (or less)
Click to expand...


256 color images could be formatted to 16-bit palette, but the visual look wouldn´t get much better.
 
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