程式語言 - Netwide Assembler (NASM) - Win32 API - Painting - Create Font



參考資訊:
https://masm32.com/board/index.php
https://www.nasm.us/xdoc/2.13rc9/html/nasmdoc0.html

在Windows視窗程式設計中,當需要文字輸出顯示在視窗上時,一般都會使用自定義的字型,因為系統預設的字型太小,而自定義的字型,除了可以是粗體或者斜體,還可以設定自定義的長寬尺寸,司徒使用一個簡單例子來說明如何建立自定義的字型

main.asm

    %include "head.asm"
 
    segment .text
WndProc:
    push ebp
    mov ebp, esp
                 
    cmp dword [ebp + ARG2], WM_PAINT
    je .handle_paint
    cmp dword [ebp + ARG2], WM_CLOSE
    je .handle_close
    cmp dword [ebp + ARG2], WM_DESTROY
    je .handle_destroy
    jmp .handle_default
            
.handle_paint:
    push ps
    push dword [ebp + ARG1]
    call BeginPaint
    mov [hDC], eax
       
    push szFont
    push DEFAULT_PITCH | FF_DONTCARE
    push CLEARTYPE_QUALITY
    push CLIP_DEFAULT_PRECIS
    push OUT_OUTLINE_PRECIS
    push 0
    push false
    push false
    push false
    push FW_BOLD
    push 0
    push 0
    push 0
    push 48
    call CreateFont
    mov [hFont], eax
 
    push 0ffh
    push dword [hDC]
    call SetTextColor
     
    push TRANSPARENT
    push dword [hDC]
    call SetBkMode
 
    push dword [hFont]
    push dword [hDC]
    call SelectObject
     
    push MsgLen
    push szMsg
    push 100
    push 100
    push dword [hDC]
    call TextOut
 
    push ps
    push dword [ebp + ARG1]
    call EndPaint
          
    push dword [hFont]
    call DeleteObject
    xor eax, eax
    jmp .finish
            
.handle_close:
    push dword [ebp + ARG1]
    call DestroyWindow
    xor eax, eax
    jmp .finish
                 
.handle_destroy:
    push 0
    call PostQuitMessage
    xor eax, eax
    jmp .finish
                 
.handle_default:
    push dword [ebp + ARG4]
    push dword [ebp + ARG3]
    push dword [ebp + ARG2]
    push dword [ebp + ARG1]
    push dword [pDefWndProc]
    call CallWindowProc
                 
.finish:
    leave
    ret 16
                 
WinMain:
    push ebp
    mov ebp, esp
                  
    push 0
    push 0
    push 0
    push 0
    push 300
    push 300
    push 0
    push 0
    push WS_OVERLAPPEDWINDOW | WS_VISIBLE
    push szAppName
    push WC_DIALOG
    push WS_EX_LEFT
    call CreateWindowEx
    mov [hWin], eax
                 
    push WndProc
    push GWL_WNDPROC
    push dword [hWin]
    call SetWindowLong
    mov [pDefWndProc], eax
              
.loop:
    push 0
    push 0
    push 0
    push msg
    call GetMessage
    cmp eax, 0
    je .exit
                  
    push msg
    call DispatchMessage
    jmp .loop
                  
.exit:
    mov eax, [msg + MSG.wParam]
    leave
    ret 16
                  
_start:
    push 0
    call GetModuleHandle
    mov [hInstance], eax
                  
    call GetCommandLine
    mov [pCommand], eax
                  
    push SW_SHOWNORMAL
    push dword [pCommand]
    push 0
    push dword [hInstance]
    call WinMain
                  
    push eax
    call ExitProcess

Line 22~37:創造一個大小48、粗體的Arial字型

完成