https://bugs.winehq.org/show_bug.cgi?id=43062
--- Comment #3 from Alexandre Julliard julliard@winehq.org --- That's a gdiplus bug, it uses SHADEBLENDCAPS to check if alpha blending is supported, but the meaning is different on display devices. Quoting MSDN: "For a display device, all blending operations are available; besides SB_NONE, the only return values are SB_CONST_ALPHA and SB_PIXEL_ALPHA, which indicate whether these operations are accelerated." It works OK with native gdiplus.