Wine >> C/C++ >> Dialog >> Painting

StretchBlt

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參考資訊：
1. win32
2. petzold
3. tutorial
4. examples_win32

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, 0, 0, 300, 300,
                        NULL, NULL, NULL, NULL);
    defWndProc =
        (WNDPROC)SetWindowLongPtr(hWin, GWLP_WNDPROC, (long int)WndProc);
    ShowWindow(hWin, SW_SHOW);

    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

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