參考資訊:
https://masm32.com/board/index.php
https://www.nasm.us/xdoc/2.13rc9/html/nasmdoc0.html
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
%include "c:\\nasmx\\inc\\nasmx.inc" %include "c:\\nasmx\\inc\\win32\\msvcrt.inc" %include "c:\\nasmx\\inc\\win32\\windows.inc" %include "c:\\nasmx\\inc\\win32\\gdi32.inc" %include "c:\\nasmx\\inc\\win32\\user32.inc" %include "c:\\nasmx\\inc\\win32\\kernel32.inc" entry start section .data hWin dd 0 hInstance dd 0 defWndProc dd 0 CommandLine dd 0 szCaption declare(NASMX_TCHAR) NASMX_TEXT("main"),0 NASMX_ISTRUC msg, MSG NASMX_IENDSTRUC NASMX_ISTRUC ps, PAINTSTRUCT NASMX_IENDSTRUC section .text proc WndProc, dword hWnd, uint_t uMsg, dword wParam, dword lParam locals local hdc, DWORD local r_pen, DWORD local g_pen, DWORD local b_pen, DWORD endlocals switch dword [argv(.uMsg)] case dword WM_PAINT invoke BeginPaint, [argv(.hWnd)], ps mov [var(.hdc)], eax invoke CreatePen, PS_SOLID, 3, 0ffh mov [var(.r_pen)], eax invoke CreatePen, PS_SOLID, 3, 0ff00h mov [var(.g_pen)], eax invoke CreatePen, PS_SOLID, 3, 0ff0000h mov [var(.b_pen)], eax invoke SelectObject, [var(.hdc)], [var(.r_pen)] invoke MoveToEx, [var(.hdc)], 10, 100, NULL invoke LineTo, [var(.hdc)], 250, 100 invoke SelectObject, [var(.hdc)], [var(.g_pen)] invoke MoveToEx, [var(.hdc)], 10, 150, NULL invoke LineTo, [var(.hdc)], 250, 150 invoke SelectObject, [var(.hdc)], [var(.b_pen)] invoke MoveToEx, [var(.hdc)], 10, 200, NULL invoke LineTo, [var(.hdc)], 250, 200 invoke EndPaint, [argv(.hWnd)], ps invoke DeleteObject, [var(.r_pen)] invoke DeleteObject, [var(.g_pen)] invoke DeleteObject, [var(.b_pen)] break case dword WM_CLOSE invoke DestroyWindow, [argv(.hWnd)] break case dword WM_DESTROY invoke PostQuitMessage, 0 break default invoke CallWindowProc, [defWndProc], [argv(.hWnd)], [argv(.uMsg)], [argv(.wParam)], [argv(.lParam)] endswitch endproc proc WinMain, dword hInst, dword hPrevInst, dword CmdLine, dword CmdShow locals none invoke CreateWindowEx, WS_EX_LEFT, WC_DIALOG, szCaption, \ WS_OVERLAPPEDWINDOW | WS_VISIBLE, 0, 0, 300, 300, NULL, NULL, NULL, NULL mov [hWin], eax invoke SetWindowLong, [hWin], GWL_WNDPROC, WndProc mov [defWndProc], eax do invoke DispatchMessage, msg invoke GetMessage, msg, NULL, NULL, NULL while eax, !=, 0 mov eax, dword [msg + MSG.wParam] endproc proc start, dword argc, dword argv locals none invoke GetModuleHandle, NULL mov [hInstance], eax invoke GetCommandLine, NULL mov [CommandLine], eax invoke WinMain, [hInstance], NULL, [CommandLine], SW_SHOWNORMAL invoke ExitProcess, NULL endproc
Line 37~54:產生三支Pen並且畫出三條直線,需要注意的是,同一時間只能選擇一支Pen
完成