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

Create Pen

---

參考資訊：
1. fasm

Pen可以想像成是一隻畫筆，粗細、顏色都可以設定，DC(Device Context)可以透過SelectObject()選擇畫筆

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: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, 10, 0ffh
    mov [pen], eax
    invoke SelectObject, [hdc], [pen]
    invoke MoveToEx, [hdc], 0, 0, NULL
    invoke LineTo, [hdc], 100, 100
 
    lea eax, [ps]
    invoke EndPaint, [hWnd], eax
    invoke DeleteObject, [pen]
    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 70~71：創造一隻Pen，粗細是10，顏色則是紅色
Line 72：選擇要使用的Pen
Line 73~74：畫一條線
Line 78：刪除資源

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

返回上一頁