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Getting scren resolution
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k4sh
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PostPosted: Thu Mar 17, 2016 4:02 pm    Post subject: Getting scren resolution Reply with quote
Hello there,

i wonder if it's possible in the [ENABLE] section of a cheat table to retrieve the screen width and height.

Any way to do this ?
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panraven
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PostPosted: Thu Mar 17, 2016 4:58 pm    Post subject: Reply with quote
In lua, not sure it is reliable,
return 4 numbers, 1st 2 numbers is width, height of full screen, next 2 numbers is client width/height ie. without taskbar, usually a smaller y with horizontal taskbar.
Code:
function getScreenSize()
  local param = cheatEngineIs64Bit() and 'mov rcx,' or 'push '
  local r = {string.format([[
//  info : https://msdn.microsoft.com/en-us/library/windows/desktop/ms724385(v=vs.85).aspx
globalalloc(_screenapi,$100)
_screenapi:
dd 0
_screenapi+10:
push rcx
push rax
%s1   // SM_CYSCREEN : The height of the screen of the primary display monitor
call GetSystemMetrics
mov [_screenapi+04],eax
%s10  // SM_CXFULLSCREEN : The width of the client area for a full-screen window on the primary display monitor
call GetSystemMetrics
mov [_screenapi+08],eax
%s11  // SM_CYFULLSCREEN : The height of the client area for a full-screen window on the primary display monitor
call GetSystemMetrics
mov [_screenapi+0c],eax
%s0   // SM_CXSCREEN : The width of the screen of the primary display monitor
call GetSystemMetrics
mov [_screenapi+00],eax
pop rax
pop rcx
ret
]],param,param,param,param),"createThread(_screenapi+10)",[[

]]}
  local w = {}
  if autoAssemble(r[1],true) then
    if autoAssemble(r[2],true) then
      for i=1,100 do
        if readIntegerLocal('_screenapi') ~= 0 then break end
        sleep(10) -- needed for the thread actually done and finished
      end
      local fmt = "_screenapi+%x"
      for i=1,4 do w[i] = readIntegerLocal(fmt:format((i-1)*4))  end

    end
    autoAssemble(r[3],true)-- dummy
  end
  return unpack(w) -- screen x,y with taskbar & x,y w/o taskbar
end

print(">>>",getScreenSize()) -- CXSCREEN, CYSCREEN,CXFULLSCREEN,CYFULLSCREEN


There should be other efficient methods. eg. @main.lua ?
Code:
D3DHOOK class:
...
properties
  Width: Integer : The width of the screen (readonly)
  Height: integer: The height of the screen (readonly)

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k4sh
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PostPosted: Fri Mar 18, 2016 1:27 pm    Post subject: Reply with quote
I copied the whole block in my enable section and it crashes Cheat engine.
If i remove the print line (last one), it doesn't crash but obviously the getscreensize function is never used.

I tried the d3dhook but i have no idea how to retrieve the width properties and i read that hooking many times is no good.
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panraven
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PostPosted: Fri Mar 18, 2016 3:30 pm    Post subject: Reply with quote
What's your ce version?
Older version may not support local execution (ie. on ce itself) of autoAssemble script, or globalalloc aa command, so may be the error~
The pic is from ce 6.4 vanilla @ winxp/vitualbox, with or without attaching a process.

btw, if AA script assembler (in target process?) is need, may try these instead of Lua function:
Code:
//32bit
push 0 //   for other value, check the msdn page, or comment inside the lua function
call GetSystemMetrics
... // result value in eax

//64bit
mov  rcx,0
call GetSystemMetrics
... // result value in eax


cescxy.jpg
 Description:
 Filesize:  8.02 KB
 Viewed:  15623 Time(s)

cescxy.jpg

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Last edited by panraven on Fri Mar 18, 2016 3:36 pm; edited 1 time in total
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k4sh
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PostPosted: Fri Mar 18, 2016 3:34 pm    Post subject: Reply with quote
Latest version.
i wrote that code into [ENABLE] section in {$lua} and {$asm}.
Never it worked.
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panraven
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PostPosted: Fri Mar 18, 2016 3:47 pm    Post subject: Reply with quote
k4sh wrote:
Latest version.
i wrote that code into [ENABLE] section in {$lua} and {$asm}.
Never it worked.


I tested in my ce 6.5.0.4591 with admin right, inside [ENABLE] section, no problem to print the result, no idea for the difference.

Sorry for my noob, I probably misunderstood the problem. It may be more make sense that ' the screen width and height' you mean is the size of target process window, eg. in a windowed game of 1366x768 at a 1920x1080 desktop, you may want the windowed 'screen'?
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k4sh
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PostPosted: Fri Mar 18, 2016 6:05 pm    Post subject: Reply with quote
Maybe you could share your working cheat table with me ?
Would be so lovely.
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panraven
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PostPosted: Sat Mar 19, 2016 1:07 am    Post subject: Reply with quote
eh... it is just copy and paste~

getScreenSizeTest.CT
 Description:

Download
 Filename:  getScreenSizeTest.CT
 Filesize:  1.94 KB
 Downloaded:  619 Time(s)

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mgr.inz.Player
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PostPosted: Sat Mar 19, 2016 7:46 am    Post subject: Reply with quote
Because we are in Lua forum section:

Lua code
Code:
local cever,offset=getCEVersion(),0
if cheatEngineIs64Bit()
  then if cever==6.4 then offset=0xE98
   elseif cever==6.5 then offset=0xEC0 end
  else if cever==6.4 then offset=0x808
   elseif cever==6.5 then offset=0x81C end
  end

local screenSizeAddress = userDataToInteger(getMainForm())+offset
local screenWidth = readIntegerLocal(screenSizeAddress)
local screenHeight = readIntegerLocal(screenSizeAddress+4)


print(screenWidth,screenHeight)





Lua code inside AA script
Code:
{$lua}
local cever=getCEVersion()
if cheatEngineIs64Bit()
  then if cever==6.4 then offset=0xE98
   elseif cever==6.5 then offset=0xEC0 end
  else if cever==6.4 then offset=0x808
   elseif cever==6.5 then offset=0x81C end
  end

local screenSizeAddress = userDataToInteger(getMainForm())+offset
local screenWidth = readIntegerLocal(screenSizeAddress)
local screenHeight = readIntegerLocal(screenSizeAddress+4)

return 'define(screenWidth,#'..screenWidth..')\r\ndefine(screenHeight,#'..screenHeight..')'
{$asm}

[ENABLE]
400500:
mov eax,screenWidth
mov ebx,screenHeight

[DISABLE]






@panraven, your code crashes on some systems.
Add sub rsp,20 and add rsp,20 to fix this problem.

Code:
_screenapi+10:
push rcx
push rax
sub rsp,20
...
...
add rsp,20
pop rax
pop rcx
ret

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k4sh
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PostPosted: Sat Mar 19, 2016 9:51 am    Post subject: Reply with quote
Thank you mgr.inz.Player.

It's working fine.

Is there a way to detect the resolution used by a process ?
i mean a game may be using lower resolution or bezel compensation like what i'm using now with an eyefinity setup.
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mgr.inz.Player
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PostPosted: Sat Mar 19, 2016 2:37 pm    Post subject: Reply with quote
What you can try:

1)
- set game to window mode, borderless, set resolution to smallest possible, e.g. it will be 640 x 480
- do fist scan, grouped, with this command:
BS:256 OOO:A 4:640 4:480

- set resolution to next, e.g. it will be 800 x 600
- do next scan, with this command:
BS:256 OOO:A 4:800 4:600


and so on. Maybe you will find some static address with width and height.



2)
- full screen, set resolution to smallest possible, e.g. it will be 640 x 480
- alttab, do fist scan, grouped, with this command:
BS:256 OOO:A 4:640 4:480

- alttab, set resolution to next, e.g. it will be 800 x 600
- alttab, do next scan, with this command:
BS:256 OOO:A 4:800 4:600


and so on...






There's a chance that those addresses will still keep the correct value while using eyefinity.
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k4sh
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PostPosted: Sat Mar 19, 2016 3:39 pm    Post subject: Reply with quote
Again thank you for your great help that is really appreciated.
I found one address that should be located in the process.
It changes through resolution changes.

However, i'm not sure it will stay the same through updates.
I have tried to see what accesses that address and while in game it gives nothing.
Finding what writes to this address gives results but it occurs only while changing resolution.

I know these resolution values are used in the game but maybe copies of these addesses i found.

I'm little bit stuck now on how to make it update proof.
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mgr.inz.Player
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PostPosted: Sat Mar 19, 2016 4:02 pm    Post subject: Reply with quote
Are those static (entry has green color in foundaddress list)?


PS:
"Finding what writes" - writes
"Finding what accesses" - writes and reads


PPS:
Do "Finding what accesses" on that address and change resolution. You should get at least one entry (you wrote you got one). We will each entry.


Highlight the first one
open in disassembler (click "show disassembler")
be sure that right opcode is highlighted,
press CTRL+A (tools->autoassemble)
from template choose "full injection", press OK
select all, copy and paste to notepad
close window

Highlight the second one (in "following opcode ..." window)
open in disassembler (click "show disassembler")
be sure that right opcode is highlighted,
press CTRL+A (tools->autoassemble)
from template choose "full injection", press OK
select all, copy and paste(append) to notepad
close window



copy from notepad and paste it here.
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k4sh
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PostPosted: Sat Mar 19, 2016 5:41 pm    Post subject: Reply with quote
So yes the address given by the grouped search is written in green.

And here is the following codes that accesses the width address
Code:

{ Game   : mgsvtpp.exe
  Version:
  Date   : 2016-03-19
  Author : K4sh

  This script does blah blah blah
}

define(address,"mgsvtpp.exe"+303747F)
define(bytes,48 89 47 40 48 8B 46 30)

[ENABLE]

assert(address,bytes)
alloc(newmem,$1000,"mgsvtpp.exe"+303747F)

label(code)
label(return)

newmem:

code:
  mov [rdi+40],rax
  mov rax,[rsi+30]
  jmp return

address:
  jmp code
  nop
  nop
  nop
return:

[DISABLE]

address:
  db bytes
  // mov [rdi+40],rax
  // mov rax,[rsi+30]

dealloc(newmem)

{
// ORIGINAL CODE - INJECTION POINT: "mgsvtpp.exe"+303747F

"mgsvtpp.exe"+3037457: 48 89 47 18                 -  mov [rdi+18],rax
"mgsvtpp.exe"+303745B: 48 8B 46 08                 -  mov rax,[rsi+08]
"mgsvtpp.exe"+303745F: 48 89 47 20                 -  mov [rdi+20],rax
"mgsvtpp.exe"+3037463: 48 8B 46 10                 -  mov rax,[rsi+10]
"mgsvtpp.exe"+3037467: 48 89 47 28                 -  mov [rdi+28],rax
"mgsvtpp.exe"+303746B: 48 8B 46 18                 -  mov rax,[rsi+18]
"mgsvtpp.exe"+303746F: 48 89 47 30                 -  mov [rdi+30],rax
"mgsvtpp.exe"+3037473: 48 8B 46 20                 -  mov rax,[rsi+20]
"mgsvtpp.exe"+3037477: 48 89 47 38                 -  mov [rdi+38],rax
"mgsvtpp.exe"+303747B: 48 8B 46 28                 -  mov rax,[rsi+28]
// ---------- INJECTING HERE ----------
"mgsvtpp.exe"+303747F: 48 89 47 40                 -  mov [rdi+40],rax
"mgsvtpp.exe"+3037483: 48 8B 46 30                 -  mov rax,[rsi+30]
// ---------- DONE INJECTING  ----------
"mgsvtpp.exe"+3037487: 48 89 47 48                 -  mov [rdi+48],rax
"mgsvtpp.exe"+303748B: E8 20 E2 F6 FF              -  call mgsvtpp.exe+2FA56B0
"mgsvtpp.exe"+3037490: B8 0F A2 C3 90              -  mov eax,90C3A20F
"mgsvtpp.exe"+3037495: 8D 80 F2 5D 3C 6F           -  lea eax,[rax+6F3C5DF2]
"mgsvtpp.exe"+303749B: 48 8B 5C 24 30              -  mov rbx,[rsp+30]
"mgsvtpp.exe"+30374A0: 48 8B 6C 24 38              -  mov rbp,[rsp+38]
"mgsvtpp.exe"+30374A5: 48 8B 74 24 40              -  mov rsi,[rsp+40]
"mgsvtpp.exe"+30374AA: 48 83 C4 20                 -  add rsp,20
"mgsvtpp.exe"+30374AE: 5F                          -  pop rdi
"mgsvtpp.exe"+30374AF: C3                          -  ret
}



{ Game   : mgsvtpp.exe
  Version:
  Date   : 2016-03-19
  Author : K4sh

  This script does blah blah blah
}

define(address,"mgsvtpp.exe"+303D7AD)
define(bytes,48 8B 42 28 48 89 45 EF)

[ENABLE]

assert(address,bytes)
alloc(newmem,$1000,"mgsvtpp.exe"+303D7AD)

label(code)
label(return)

newmem:

code:
  mov rax,[rdx+28]
  mov [rbp-11],rax
  jmp return

address:
  jmp code
  nop
  nop
  nop
return:

[DISABLE]

address:
  db bytes
  // mov rax,[rdx+28]
  // mov [rbp-11],rax

dealloc(newmem)

{
// ORIGINAL CODE - INJECTION POINT: "mgsvtpp.exe"+303D7AD

"mgsvtpp.exe"+303D78A: 31 F6                                   -  xor esi,esi
"mgsvtpp.exe"+303D78C: 41 89 F4                                -  mov r12d,esi
"mgsvtpp.exe"+303D78F: 41 89 F5                                -  mov r13d,esi
"mgsvtpp.exe"+303D792: 48 8B 3A                                -  mov rdi,[rdx]
"mgsvtpp.exe"+303D795: 4C 8B 7A 08                             -  mov r15,[rdx+08]
"mgsvtpp.exe"+303D799: 48 8B 5A 10                             -  mov rbx,[rdx+10]
"mgsvtpp.exe"+303D79D: 48 8B 42 18                             -  mov rax,[rdx+18]
"mgsvtpp.exe"+303D7A1: 48 89 45 FF                             -  mov [rbp-01],rax
"mgsvtpp.exe"+303D7A5: 48 8B 42 20                             -  mov rax,[rdx+20]
"mgsvtpp.exe"+303D7A9: 48 89 45 07                             -  mov [rbp+07],rax
// ---------- INJECTING HERE ----------
"mgsvtpp.exe"+303D7AD: 48 8B 42 28                             -  mov rax,[rdx+28]
"mgsvtpp.exe"+303D7B1: 48 89 45 EF                             -  mov [rbp-11],rax
// ---------- DONE INJECTING  ----------
"mgsvtpp.exe"+303D7B5: 48 8B 42 30                             -  mov rax,[rdx+30]
"mgsvtpp.exe"+303D7B9: 48 89 45 0F                             -  mov [rbp+0F],rax
"mgsvtpp.exe"+303D7BD: 48 89 75 8F                             -  mov [rbp-71],rsi
"mgsvtpp.exe"+303D7C1: 48 89 75 97                             -  mov [rbp-69],rsi
"mgsvtpp.exe"+303D7C5: 48 8D 45 97                             -  lea rax,[rbp-69]
"mgsvtpp.exe"+303D7C9: 48 89 45 9F                             -  mov [rbp-61],rax
"mgsvtpp.exe"+303D7CD: 48 8D 45 8F                             -  lea rax,[rbp-71]
"mgsvtpp.exe"+303D7D1: 48 89 45 A7                             -  mov [rbp-59],rax
"mgsvtpp.exe"+303D7D5: 48 8D 45 93                             -  lea rax,[rbp-6D]
"mgsvtpp.exe"+303D7D9: 48 89 45 AF                             -  mov [rbp-51],rax
}
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mgr.inz.Player
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PostPosted: Sat Mar 19, 2016 7:40 pm    Post subject: Reply with quote
OK.

Could you rightclick on "mgsvtpp.exe"+303747F (in memory viewer) and choose "find out what addresses ...".

That way we can check how many addresses that instruction access. If only one (go back to game and play the game for a while), we can use that without problems. If more than one, we have to use some filtering.



Also try it on "mgsvtpp.exe"+303D7AD
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