twain协议,传输文件大小达到200MB时采用文件传输模式
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@ -1155,43 +1155,50 @@ HGResult HGTwainDSImpl::ImageNativeXfer(HGUInt type, HGUInt origin, HGImage* ima
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return HGTWAIN_ERR_FAIL;
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}
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#ifdef _WIN64
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HANDLE hMem = NULL;
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if (TWRC_XFERDONE != m_dsmImpl->m_pDSMProc(&m_dsmImpl->m_AppId, &m_iden, DG_IMAGE, DAT_IMAGENATIVEXFER, MSG_GET, &hMem))
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HGResult ret = HGBASE_ERR_FAIL;
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int fileSize = info.ImageWidth * info.ImageLength * info.BitsPerPixel / 8;
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if (fileSize > 200 * 1024 * 1024)
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{
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return HGTWAIN_ERR_FAIL;
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HANDLE hMem = NULL;
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if (TWRC_XFERDONE != m_dsmImpl->m_pDSMProc(&m_dsmImpl->m_AppId, &m_iden, DG_IMAGE, DAT_IMAGENATIVEXFER, MSG_GET, &hMem))
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{
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return HGTWAIN_ERR_FAIL;
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}
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HGStream stream = NULL;
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ret = HGBase_CreateDIBStream(hMem, &stream);
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GlobalFree(hMem);
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if (HGBASE_ERR_OK != ret)
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{
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return ret;
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}
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ret = HGBase_CreateImageFromStream(stream, NULL, type, origin, image);
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HGBase_DestroyStream(stream);
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}
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else
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{
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HGChar tmpFile[260];
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HGBase_GetTmpFileName("bmp", tmpFile, 260);
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TW_SETUPFILEXFER xfer = {0};
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strcpy(xfer.FileName, tmpFile);
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xfer.Format = TWFF_BMP;
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if (TWRC_SUCCESS != m_dsmImpl->m_pDSMProc(&m_dsmImpl->m_AppId, &m_iden, DG_CONTROL, DAT_SETUPFILEXFER, MSG_SET, &xfer))
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{
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return HGTWAIN_ERR_FAIL;
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}
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if (TWRC_XFERDONE != m_dsmImpl->m_pDSMProc(&m_dsmImpl->m_AppId, &m_iden, DG_IMAGE, DAT_IMAGEFILEXFER, MSG_GET, NULL))
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{
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return HGTWAIN_ERR_FAIL;
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}
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ret = HGBase_CreateImageFromFile(tmpFile, NULL, type, origin, image);
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HGBase_DeleteFile(tmpFile);
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}
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HGStream stream = NULL;
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HGResult ret = HGBase_CreateDIBStream(hMem, &stream);
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GlobalFree(hMem);
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if (HGBASE_ERR_OK != ret)
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{
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return ret;
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}
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ret = HGBase_CreateImageFromStream(stream, NULL, type, origin, image);
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HGBase_DestroyStream(stream);
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#else
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HGChar tmpFile[260];
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HGBase_GetTmpFileName("bmp", tmpFile, 260);
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TW_SETUPFILEXFER xfer = {0};
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strcpy(xfer.FileName, tmpFile);
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xfer.Format = TWFF_BMP;
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if (TWRC_SUCCESS != m_dsmImpl->m_pDSMProc(&m_dsmImpl->m_AppId, &m_iden, DG_CONTROL, DAT_SETUPFILEXFER, MSG_SET, &xfer))
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{
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return HGTWAIN_ERR_FAIL;
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}
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if (TWRC_XFERDONE != m_dsmImpl->m_pDSMProc(&m_dsmImpl->m_AppId, &m_iden, DG_IMAGE, DAT_IMAGEFILEXFER, MSG_GET, NULL))
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{
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return HGTWAIN_ERR_FAIL;
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}
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HGResult ret = HGBase_CreateImageFromFile(tmpFile, NULL, type, origin, image);
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HGBase_DeleteFile(tmpFile);
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#endif
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return ret;
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}
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