Esme Povirk (@madewokherd) commented about dlls/gdiplus/tests/graphics.c:
+ status = GdipCreateBitmapFromGdiDib((BITMAPINFO*)&bmihdr, buff, &bm); + expect(Ok, status); + ok(NULL != bm, "Expected bitmap to be initialized\n"); + status = GdipCreateFromHDC(hdc, &graphics); + expect(Ok, status); + + status = GdipCreateMatrix2(2.0, 0.0, 0.0, 1.0, 10.0, 20.0, &transform); + expect(Ok, status); + + /* DrawImageFX with source rectangle */ + status = GdipDrawImageFX(graphics, NULL, &source, NULL, NULL, NULL, UnitPixel); + todo_wine + expect(InvalidParameter, status); + + /* DrawImageFX with source bitmap */ + status = GdipDrawImageFX(graphics, (GpImage*)bm, NULL, NULL, NULL, NULL, UnitPixel); This is going to use the contents of `buff` uninitialized.
-- https://gitlab.winehq.org/wine/wine/-/merge_requests/4638#note_55549