FASM >> Assembly (x86) >> Win32 API >> Painting

Draw Line

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參考資訊：
1. fasm

線的起始點位置是位於(x=0, y=0)，使用者可以呼叫MoveToEx()設定新的起始點，而使用LineTo()就可以畫出一條直線，新的起始點則是線的結束位置

main.asm

    format PE GUI 4.0
    entry start
         
    include "c:\fasm\include\win32a.inc"
        
    section ".idata" import data readable writeable
library user, "user32.dll", kernel, "kernel32.dll", gdi, "gdi32.dll"
   
import gdi,                              \
    LineTo,           "LineTo",          \
    SetPixel,         "SetPixel",        \
    MoveToEx,         "MoveToEx",        \
    CreatePen,        "CreatePen",       \
    DeleteObject,     "DeleteObject",    \
    SelectObject,     "SelectObject",    \
    CreateSolidBrush, "CreateSolidBrush"
   
import user,                             \
    FillRect,        "FillRect",         \
    EndPaint,        "EndPaint",         \
    SetTimer,        "SetTimer",         \
    wsprintf,        "wsprintfA",        \
    KillTimer,       "KillTimer",        \
    BeginPaint,      "BeginPaint",       \
    MessageBox,      "MessageBoxA",      \
    GetMessage,      "GetMessageA",      \
    SetScrollPos,    "SetScrollPos",     \
    DestroyWindow,   "DestroyWindow",    \
    SetWindowText,   "SetWindowTextA",   \
    SetWindowLong,   "SetWindowLongA",   \
    SetScrollRange,  "SetScrollRange",   \
    CreateWindowEx,  "CreateWindowExA",  \
    CallWindowProc,  "CallWindowProcA",  \
    DispatchMessage, "DispatchMessageA", \
    PostQuitMessage, "PostQuitMessage"
        
import kernel,                           \
    ExitProcess,     "ExitProcess",      \
    GetCommandLine,  "GetCommandLineA",  \
    GetModuleHandle, "GetModuleHandleA"
         
    section ".data" data readable writeable
hWin        dd 0
szCaption   db "main",0
hInstance   dd 0
CommandLine dd 0
defWndProc  dd 0
    
    section ".text" code readable executable
proc WndProc hWnd, uMsg, wParam, lParam
    local hdc:DWORD
    local pen[4]:DWORD
    local ps:PAINTSTRUCT
   
    mov eax, [uMsg]
    cmp eax, WM_PAINT
    je .handle_paint
    cmp eax, WM_CLOSE
    je .handle_close
    cmp eax, WM_DESTROY
    je .handle_destroy
    invoke CallWindowProc, [defWndProc], [hWnd], [uMsg], [wParam], [lParam]
    jmp .finish
    
.handle_paint:
    lea eax, [ps]
    invoke BeginPaint, [hWnd], eax
    mov [hdc], eax
   
    invoke CreatePen, PS_SOLID, 3, 0ffh
    mov [pen + 0], eax
    invoke CreatePen, PS_SOLID, 3, 0ff00h
    mov [pen + 4], eax
    invoke CreatePen, PS_SOLID, 3, 0ff0000h
    mov [pen + 8], eax

    invoke SelectObject, [hdc], [pen + 0]
    invoke MoveToEx, [hdc], 10, 100, NULL
    invoke LineTo, [hdc], 250, 100
  
    invoke SelectObject, [hdc], [pen + 4]
    invoke MoveToEx, [hdc], 10, 150, NULL
    invoke LineTo, [hdc], 250, 150
  
    invoke SelectObject, [hdc], [pen + 8]
    invoke MoveToEx, [hdc], 10, 200, NULL
    invoke LineTo, [hdc], 250, 200
  
    lea eax, [ps]
    invoke EndPaint, [hWnd], eax
    invoke DeleteObject, [pen + 0]
    invoke DeleteObject, [pen + 4]
    invoke DeleteObject, [pen + 8]
    xor eax, eax
    jmp .finish
    
.handle_close:
    invoke DestroyWindow, [hWnd]
    xor eax, eax
    jmp .finish
        
.handle_destroy:
    invoke PostQuitMessage, 0
    xor eax, eax
    jmp .finish
         
.finish:
    ret
endp
        
proc WinMain hInst, hPrevInst, CmdLine, CmdShow
    local msg:MSG
        
    invoke CreateWindowEx, WS_EX_LEFT, WC_DIALOG, szCaption, \
        WS_OVERLAPPEDWINDOW or WS_VISIBLE, 0, 0, 300, 300, NULL, NULL, NULL, NULL
    mov [hWin], eax
        
    invoke SetWindowLong, [hWin], GWL_WNDPROC, WndProc
    mov [defWndProc], eax
     
@@:
    lea eax, [msg]
    invoke GetMessage, eax, NULL, 0, 0
    cmp eax, 0
    je @f
    lea eax, [msg]
    invoke DispatchMessage, eax
    jmp @b
@@:
    mov eax, [msg.wParam]
    ret
endp
        
start:
    invoke GetModuleHandle, NULL
    mov [hInstance], eax
         
    invoke GetCommandLine
    mov [CommandLine], eax
         
    stdcall WinMain, [hInstance], NULL, [CommandLine], SW_SHOWNORMAL
    invoke ExitProcess, eax

Line 70~87：產生三隻Pen並且畫出三條直線，需要注意的是，同一時間只能選擇一隻Pen

Makefile

export WINEPREFIX=/home/user/.wine_amd64

TARGET=main
MYWINE=box86 wine
FASM32=/home/user/.wine_amd64/drive_c/fasm

all:
	${MYWINE} ${FASM32}/fasm.exe ${TARGET}.asm

run:
	${MYWINE} ${TARGET}.exe

clean:
	rm -rf ${TARGET}.exe

編譯、執行

$ make
$ make run

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