I have modified some code, but this is displaying only half of the picture.

I want to show a pic at the beginning of my program and then go on to other things.

Do I need to modify the dimensions in
invoke BitBlt,hDC,10,10,166,68,memDC,0,0,SRCCOPY ?

Thanks.




; test.asm
      .386
      .model flat, stdcall  ; 32 bit memory model
      option casemap :none  ; case sensitive

      include bitblt.inc    ; local includes for this file

.code

start:
      invoke GetModuleHandle, NULL
      mov hInstance, eax

      invoke LoadBitmap,hInstance,100
      mov hBmp, eax

      invoke GetCommandLine
      mov CommandLine, eax

      invoke WinMain,hInstance,NULL,CommandLine,SW_SHOWDEFAULT
      invoke ExitProcess,eax

WinMain proc hInst    :DWORD,
            hPrevInst :DWORD,
            CmdLine  :DWORD,
            CmdShow  :DWORD

      ;====================
      ; Put LOCALs on stack
      ;====================

      LOCAL wc  :WNDCLASSEX
      LOCAL msg  :MSG
      LOCAL Wwd  :DWORD
      LOCAL Wht  :DWORD
      LOCAL Wtx  :DWORD
      LOCAL Wty  :DWORD

      ;==================================================
      ; Fill WNDCLASSEX structure with required variables
      ;==================================================

      invoke LoadIcon,hInst,500    ; icon ID
      mov hIcon, eax

      szText szClassName,"Project_Class"

      mov wc.cbSize,        sizeof WNDCLASSEX
      mov wc.style,          CS_BYTEALIGNWINDOW
      mov wc.lpfnWndProc,    offset WndProc
      mov wc.cbClsExtra,    NULL
      mov wc.cbWndExtra,    NULL
      m2m wc.hInstance,      hInst
      mov wc.hbrBackground,  COLOR_BTNFACE+1
      mov wc.lpszMenuName,  NULL
      mov wc.lpszClassName,  offset szClassName
      m2m wc.hIcon,          hIcon
        invoke LoadCursor,NULL,IDC_ARROW
      mov wc.hCursor,        eax
      m2m wc.hIconSm,        hIcon

      invoke RegisterClassEx, ADDR wc

      ;================================
      ; Centre window at following size
      ;================================

      mov Wwd, 500
      mov Wht, 350

      invoke GetSystemMetrics,SM_CXSCREEN
      invoke TopXY,Wwd,eax
      mov Wtx, eax

      invoke GetSystemMetrics,SM_CYSCREEN
      invoke TopXY,Wht,eax
      mov Wty, eax

      invoke CreateWindowEx,WS_EX_LEFT,
                            ADDR szClassName,
                            ADDR szDisplayName,
                            WS_OVERLAPPEDWINDOW,
                            Wtx,Wty,Wwd,Wht,
                            NULL,NULL,
                            hInst,NULL
      mov  hWnd,eax

      invoke LoadMenu,hInst,600  ; menu ID
      invoke SetMenu,hWnd,eax

      invoke ShowWindow,hWnd,SW_SHOWNORMAL
      invoke UpdateWindow,hWnd

      ;===================================
      ; Loop until PostQuitMessage is sent
      ;===================================

    StartLoop:
      invoke GetMessage,ADDR msg,NULL,0,0
      cmp eax, 0
      je ExitLoop
      invoke TranslateMessage, ADDR msg
      invoke DispatchMessage,  ADDR msg
      jmp StartLoop
    ExitLoop:

      return msg.wParam

WinMain endp

WndProc proc hWin  :DWORD,
            uMsg  :DWORD,
            wParam :DWORD,
            lParam :DWORD

    LOCAL var    :DWORD
    LOCAL caW    :DWORD
    LOCAL caH    :DWORD
    LOCAL Rct    :RECT
    LOCAL hDC    :DWORD
    LOCAL Ps    :PAINTSTRUCT
    LOCAL buffer1[128]:BYTE  ; these are two spare buffers
    LOCAL buffer2[128]:BYTE  ; for text manipulation etc..

    .if uMsg == WM_COMMAND
    ;======== menu commands ========
    .elseif uMsg == WM_CREATE

    .elseif uMsg == WM_SIZE

    .elseif uMsg == WM_PAINT
        invoke BeginPaint,hWin,ADDR Ps
          mov hDC, eax
          invoke Paint_Proc,hWin,hDC
        invoke EndPaint,hWin,ADDR Ps
        return 0

    .elseif uMsg == WM_CLOSE

    .elseif uMsg == WM_DESTROY
        invoke PostQuitMessage,NULL
        return 0
    .endif

    invoke DefWindowProc,hWin,uMsg,wParam,lParam

    ret

WndProc endp

TopXY proc wDim:DWORD, sDim:DWORD

    shr sDim, 1      ; divide screen dimension by 2
    shr wDim, 1      ; divide window dimension by 2
    mov eax, wDim    ; copy window dimension into eax
    sub sDim, eax    ; sub half win dimension from half screen dimension

    return sDim

TopXY endp

Paint_Proc proc hWin:DWORD, hDC:DWORD

    LOCAL hOld:DWORD
    LOCAL memDC :DWORD

    invoke CreateCompatibleDC,hDC
    mov memDC, eax
   
    invoke SelectObject,memDC,hBmp
    mov hOld, eax

    invoke BitBlt,hDC,10,10,166,68,memDC,0,0,SRCCOPY

    invoke SelectObject,hDC,hOld
    invoke DeleteDC,memDC

    return 0

Paint_Proc endp

; ########################################################################

end start
Attachments:
Posted on 2010-05-01 16:04:25 by skywalker
I don't have MASM here anymore and the attachment lacks of an executable that I could patch so the following may be wrong and/or incomplete:

You need to change to "invoke BitBlt,hDC,10,10,183,170,memDC,0,0,SRCCOPY" to fully copy the image.
Posted on 2010-05-01 16:53:43 by LocoDelAssembly