程式語言 - Wine - C/C++ - Painting - StretchBlt

參考資訊：
http://www.winprog.org/tutorial/
http://winapi.freetechsecrets.com/win32/
https://github.com/gammasoft71/Examples_Win32
http://masm32.com/board/index.php?topic=3584.0
https://learn.microsoft.com/en-us/windows/win32/winmsg/window-styles

main.c

#include <stdbool.h>
#include <windows.h>

HWND hWin = NULL;
WNDPROC defWndProc = NULL;

LRESULT CALLBACK WndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
    switch (uMsg) {
    case WM_CLOSE:
        DestroyWindow(hWnd);
        return 0;
    case WM_DESTROY:
        PostQuitMessage(0);
        return 0;
    case WM_PAINT:
        const char *pMsg = "Test";
        PAINTSTRUCT ps = {0};
        HDC hdc = BeginPaint(hWnd, &ps);
        HFONT font = CreateFont(18, 0, 0, 0, FW_BOLD, false, false, false, 0,
            OUT_OUTLINE_PRECIS, CLIP_DEFAULT_PRECIS,
            CLEARTYPE_QUALITY, DEFAULT_PITCH | FF_DONTCARE, "Arial");

        SetTextColor(hdc, RGB(0x00, 0x00, 0xff));
        SetBkMode(hdc, TRANSPARENT);
        SelectObject(hdc, font);
        DrawText(hdc, pMsg, strlen(pMsg), &ps.rcPaint, DT_SINGLELINE);

        StretchBlt(hdc, 50, 50, 200, 200, hdc, 0, 0, 30, 30, SRCCOPY);

        EndPaint(hWnd, &ps);
        DeleteObject(font);
        break;
    }
    return CallWindowProc(defWndProc, hWnd, uMsg, wParam, lParam);
}

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
{
    hWin = CreateWindow(WC_DIALOG, "main",
        WS_OVERLAPPEDWINDOW | WS_VISIBLE, 0, 0, 300, 300, NULL, NULL, NULL, NULL);
    defWndProc = (WNDPROC)SetWindowLongPtr(hWin, GWLP_WNDPROC, (long int)WndProc);

    MSG msg = {0};
    while (GetMessage(&msg, NULL, 0, 0)) {
        DispatchMessage(&msg);
    }
    ExitProcess(0);
    return 0;
}

編譯、執行

$ winegcc main.c -o main -lgdi32
$ wine ./main.exe