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authorMike Kaganski <>2017-12-22 02:50:50 +0300
committerMike Kaganski <>2017-12-22 10:43:50 +0100
commit7ea805eb81ce865198cdb0fe418a73f6c353310e (patch)
tree5dae4f78f1ff592a6c9d4475d49029d62f742428 /cppcanvas
parente62d00db505258ac788958e354b5f928a99d4cad (diff)
tdf#114635: fix TWAIN on Windows 64 bit
DG_IMAGE / DAT_IMAGENATIVEXFER / MSG_GET is documented [1] to take a handle as its pData parameter, but said to be TW_UINT32. The latter is false, because it returns a Windows handle to DIB to that parameter, and it has 64 bits on 64-bit Windows systems. A crash resulted when wrong value attempted to be GlobalLock'd, pBIH was nullptr, and was dereferenced. Also, in some circumstances, duplicate MSG_XFERREADY might arrive sequentially; the second one arrives when current state has already changed value, and thus TWAIN_EVENT_QUIT used to be sent, resulting in mpImpTwain destroyed before TWAIN_EVENT_XFER processed. This had lead to absent result of scan. [1] Change-Id: Ic03fe7681f6003e5fda0c071be181696f9bc866a Reviewed-on: Tested-by: Jenkins <> Reviewed-by: Mike Kaganski <>
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