• Zhiyi Zhang's avatar
    win32u: Create a dummy bitmap for display device contexts. · 546cbdc2
    Zhiyi Zhang authored
    On Windows 7 and older versions of Windows, calling GetCurrentObject(hdc, OBJ_BITMAP) for a display
    device context will return a valid handle. However, this handle will fail for GetObject(). On newer
    versions of Windows, GetCurrentObject(hdc, OBJ_BITMAP) for display device contexts returns a bitmap
    of virtual screen size and its size changes after display mode changes. This behavior is tested in
    the _check_display_dc() function in user32/tests/monitor.c.
    
    The screen shot function of WeChat depends on GetObject() to either return failure or a valid size
    for the bitmap from display device contexts. Since Wine currently report Windows 7 as default and to
    save memory, the Windows 7 behavior is implemented.
    Signed-off-by: 's avatarZhiyi Zhang <zzhang@codeweavers.com>
    546cbdc2
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