diff options
| author | karlf <[email protected]> | 2016-08-11 13:28:13 -0700 |
|---|---|---|
| committer | karlf <[email protected]> | 2016-08-11 13:28:13 -0700 |
| commit | 96eb96dfb613e4c745db6bd1f53a92fe7e2290fc (patch) | |
| tree | ad5f3ede5cbcd6b598677ce41bcf8318471bdd92 /wia/ProdScan/MiniDrv.cpp | |
| parent | 687b274aa38fd05c8c26e3068932121876d7f745 (diff) | |
Updated for "Windows 10 Anniversary Update" (Version 1607)
Diffstat (limited to 'wia/ProdScan/MiniDrv.cpp')
| -rw-r--r-- | wia/ProdScan/MiniDrv.cpp | 2619 |
1 files changed, 2619 insertions, 0 deletions
diff --git a/wia/ProdScan/MiniDrv.cpp b/wia/ProdScan/MiniDrv.cpp new file mode 100644 index 00000000..3a00291b --- /dev/null +++ b/wia/ProdScan/MiniDrv.cpp @@ -0,0 +1,2619 @@ +/************************************************************************** +* +* Copyright � Microsoft Corporation +* +* Title: MiniDrv.cpp +* +* Description: This file contains the IWiaMiniDrv interface implementation +* for the Production Scanner Driver Sample, plus C++ constructor and +* destructor code for the main driver's objects, CWiaDriver. +* +***************************************************************************/ + +#include "stdafx.h" + +HINSTANCE g_hInst = NULL; + +/**************************************************************************\ +* +* CWiaDriver constructor +* +\**************************************************************************/ + +CWiaDriver::CWiaDriver( + _In_opt_ LPUNKNOWN punkOuter) : + m_cRef(1), + m_punkOuter(NULL), + m_pIDrvItemRoot(NULL), + m_lClientsConnected(0), + m_bstrDeviceID(NULL), + m_bstrRootFullItemName(NULL), + m_pIStiDevice(NULL), + m_hDeviceKey(NULL), + m_bFeederStarted(FALSE) +{ + // + // See if we are aggregated. If we are (almost always the case) + // save the pointer to the controlling IUnknown, so subsequent + // calls will be delegated. If not, set the same pointer to "this": + // + if (punkOuter) + { + m_punkOuter = punkOuter; + } + else + { + // + // This cast is needed in order to point to right virtual table: + // + m_punkOuter = reinterpret_cast<IUnknown*>(static_cast<INonDelegatingUnknown*>(this)); + } + + memset(m_wszDevicePath, 0, sizeof(m_wszDevicePath)); + + + // + // Warning: do not initialize the entire contents of m_config and m_status to 0, + // this will erase the function pointer tables for the CBasicDynamicArray members! + // + + m_hrLastEdviceError = STI_ERROR_NO_ERROR; + + m_hWiaEvent = NULL; + m_hWiaEventStoredCopy = NULL; + m_bstrScanAvailableItem = NULL; + + // + // IStiUSD::Initialize not executed yet: + // + m_bInitialized = FALSE; + + // + // Initialize the critical section for DestroyDriverItemTree: + // + InitializeCriticalSection(&m_csDestroyDriverItemTree); + + WIAS_TRACE((g_hInst, "Driver object (%p, process: %u) created", this, GetCurrentProcessId())); +} + +/**************************************************************************\ +* +* CWiaDriver destructor +* +\**************************************************************************/ + +CWiaDriver::~CWiaDriver() +{ + DWORD dwProcessId = GetCurrentProcessId(); + DWORD dwThreadId = GetCurrentThreadId(); + + WIAS_TRACE((g_hInst, "Destroying driver object (%p, process: %u, thread: %u)..", + this, dwProcessId, dwThreadId)); + + // + // Free the memory allocated for the global device ID and root item name: + // + if (m_bstrDeviceID) + { + SysFreeString(m_bstrDeviceID); + m_bstrDeviceID = NULL; + } + + if (m_bstrRootFullItemName) + { + SysFreeString(m_bstrRootFullItemName); + m_bstrRootFullItemName = NULL; + } + + // + // Free WIA_FORMAT_INFO arrays: + // + m_tFormatInfo.Destroy(); + m_tFormatInfoImprinterEndorser.Destroy(); + m_tFormatInfoBarcodeReader.Destroy(); + m_tFormatInfoPatchCodeReader.Destroy(); + m_tFormatInfoMicrReader.Destroy(); + + // + // Free cached driver capability array: + // + m_tCapabilityManager.Destroy(); + + // + // Unlink and release the cached IWiaDrvItem root item interface: + // + DestroyDriverItemTree(); + + // + // The driver item tree is destroyed, the critical section can be deleted. + // Make sure there is no concurrent thread releasing the Root item from + // within IWiaMiniDrv::drvUnInitializeWia and delete the critical section: + // + EnterCriticalSection(&m_csDestroyDriverItemTree); + LeaveCriticalSection(&m_csDestroyDriverItemTree); + DeleteCriticalSection(&m_csDestroyDriverItemTree); + + if (m_bstrScanAvailableItem) + { + SysFreeString(m_bstrScanAvailableItem); + m_bstrScanAvailableItem = NULL; + } + + // + // The WIA service may release the driver object during a scanner status update + // operation, for example following an unexpected device disconnect event. + // When this happens we must wait for the critical section to be released before + // deleting it, otherwise the thread owning the CS may remain in an undefined state: + // + + m_bInitialized = FALSE; + + WIAS_TRACE((g_hInst, "Driver object (%p, process: %u, thread: %u) destroyed", this, dwProcessId, dwThreadId)); +} + +/**************************************************************************\ +* +* Implements IWiaMiniDrv::drvInitializeWia. Initializes the mini-driver in +* the context of a new WIA application session and creates if needed the +* unique Driver Item Tree describing the item architecture and item names +* that the WIA service will use to create duplicate Application Item Trees +* for each new WIA application session opened with the driver. When the WIA +* service executes this method the driver must receive a character string +* containing the device�s unique identifier along with the IStiDevice COM +* interface pointer describing the current device. The driver must create +* the driver item tree if it hasn�t been built yet. Finally, the driver +* must return back to the WIA service the pointer to the Root item in the +* Driver Item Tree. +* +* Parameters: +* +* pWiasContext - pointer to the item context +* lFlags - reserved (set to 0) +* bstrDeviceID - string containing the device's unique identifier +* bstrRootFullItemName - string containing the full name of the root item +* pStiDevice - points to an IStiDevice interface +* pIUnknownOuter - (optional) to receive an IUnknown interface address +* ppIDrvItemRoot - receives the address of the IWiaDrvItem interface +* for the root item +* ppIUnknownInner - unsupported and always set to NULL (all this driver's WIA +* functionality is covered through its IWiaMiniDrv interface) +* plDevErrVal - always set to 0 by this driver (drvGetDeviceErrorStr unsupported) +* +* Return Value: +* +* S_OK if successful, an error HRESULT otherwise +* +\**************************************************************************/ + +HRESULT CWiaDriver::drvInitializeWia( + _Inout_ BYTE* pWiasContext, + LONG lFlags, + _In_ BSTR bstrDeviceID, + _In_ BSTR bstrRootFullItemName, + _In_ IUnknown* pStiDevice, + _In_ IUnknown* pIUnknownOuter, + _Out_ IWiaDrvItem** ppIDrvItemRoot, + _Out_ IUnknown** ppIUnknownInner, + _Out_ LONG* plDevErrVal) +{ + UNREFERENCED_PARAMETER(pIUnknownOuter); + UNREFERENCED_PARAMETER(lFlags); + + HRESULT hr = S_OK; + + // + // (1/2) Uncomment the code below to enable a basic safety guard against premature + // drvInitializeWia call made by WIA Service before IStiUSD::Initialize completes: + // + // If IWiaMiniDrv::drvInitializeWia is called before IStiUSD::Initialize + // is complete wait up to 1 minute (10 msec x 6000 times) and retry: + // + // const LONG lMaxWaitCycles = 6000; + // const LONG lWaitInterval = 10; + // LONG lWaitCycles = 0; + // + + WIAEX_TRACE_BEGIN; + + if ((!pWiasContext) || (!plDevErrVal)) + { + hr = E_INVALIDARG; + WIAEX_ERROR((g_hInst, "Invalid parameter, hr = 0x%08X", hr)); + } + + if (SUCCEEDED(hr)) + { + *plDevErrVal = 0; + *ppIDrvItemRoot = NULL; + *ppIUnknownInner = NULL; + + if (!m_bstrDeviceID) + { + m_bstrDeviceID = SysAllocString(bstrDeviceID); + if (!m_bstrDeviceID) + { + hr = E_OUTOFMEMORY; + WIAEX_ERROR((g_hInst, "Failed to allocate BSTR DeviceID string, hr = 0x%08X", hr)); + } + } + } + + if (SUCCEEDED(hr)) + { + if (!m_pIStiDevice) + { + m_pIStiDevice = reinterpret_cast<IStiDevice*>(pStiDevice); + } + + if (!m_bstrRootFullItemName) + { + m_bstrRootFullItemName = SysAllocString(bstrRootFullItemName); + if (!m_bstrRootFullItemName) + { + hr = E_OUTOFMEMORY; + WIAEX_ERROR((g_hInst, "Failed to allocate BSTR Root full item name string, hr = 0x%08X", hr)); + } + } + } + + if (SUCCEEDED(hr)) + { + if (!m_pIDrvItemRoot) + { + // + // (2/2) Uncomment the code below to enable a basic safety guard against premature + // drvInitializeWia call made by WIA Service before IStiUSD::Initialize completes: + // + // The WIA service may call IWiaMiniDrv::drvInitializeWia before the + // IStiUSD::Initialize call is completed. Temporarily block creating the Driver Item + // Tree until IStiUSD::Initialize is complete: + // + // if (!m_bInitialized) + // { + // WIAS_TRACE((g_hInst, "Driver not intialized yet, wait..")); + // + // // + // // Wait up to 10 msec x 6000 = 1 minute for IStiUSD::Initialize to complete: + // // + // while ((!m_bInitialized) && ((++lWaitCycles) <= lMaxWaitCycles)) + // { + // Sleep(lWaitInterval); + // } + // + // if (m_bInitialized) + // { + // WIAS_TRACE((g_hInst, "Driver intialized now")); + // } + // else + // { + // WIAEX_ERROR((g_hInst, "Maxmimum timeout reached, driver still not initialized")); + // } + // } + // + + // + // Create the Driver Item Tree matching the current scanner configuration: + // + hr = BuildDriverItemTree(); + if (FAILED(hr)) + { + WIAEX_ERROR((g_hInst, "Failed to create the Driver Item Tree, hr = 0x%08X", hr)); + } + } + else + { + // + // The Driver Item Tree already exists. The root item of this item tree + // should be returned to the WIA service: + // + hr = S_OK; + } + } + + // + // Increment the client connection count only when the driver has + // successfully created all the necessary Driver Item Tree items: + // + if (SUCCEEDED(hr)) + { + *ppIDrvItemRoot = m_pIDrvItemRoot; + InterlockedIncrement(&m_lClientsConnected); + WIAS_TRACE((g_hInst,"drvInitializeWia, %d client(s) are currently connected to this driver", m_lClientsConnected)); + } + + + if (FAILED(hr)) + { + m_hrLastEdviceError = hr; + } + + WIAEX_TRACE((g_hInst, "IWiaMiniDrv::drvInitializeWia 0x%08X", hr)); + + return hr; +} + +/**************************************************************************\ +* +* Implements IWiaMiniDrv::drvInitItemProperties. The WIA service builds the +* Application Item Tree and then asks the driver to initialize each item +* executing IWiaMiniDvr::drvInitItemProperties on each before to hand the +* entire tree over to the application (when completing the IWiaDevMgr:: +* CreateDevice or IWiaDevMgr2::CreateDevice call the application makes +* to open a new WIA session). When this method is called the driver is given +* the context of the Application Tree Item to be initialized. The driver must +* populate the item with WIA properties, fully initialized with their names, +* access flags, valid and current values. +* +* This driver supports to create and initialize one of each of the following items: +* +* Root (WIA_CATEGORY_ROOT) +* Flatbed (WIA_CATEGORY_FLATBED, no children) +* Feeder (WIA_CATEGORY_FEEDER, no children) +* Auto (WIA_CATEGORY_AUTO) +* Imprinter (WIA_CATEGORY_IMPRINTER) +* Endorser (WIA_CATEGORY_ENDORSER) +* Barcode Reader (WIA_CATEGORY_BARCODE_READER) +* Patch Code Reader (WIA_CATEGORY_PATCH_CODE_READER) +* MICR Reader (WIA_CATEGORY_MICR_READER) +* +* Parameters: +* +* pWiasContext - pointer to the item context +* lFlags - reserved (set to 0) +* plDevErrVal - always set to 0 by this driver (drvGetDeviceErrorStr unsupported) +* +* Return Value: +* +* S_OK if successful, an error HRESULT otherwise +* +\**************************************************************************/ + +HRESULT CWiaDriver::drvInitItemProperties( + _Inout_ BYTE* pWiasContext, + LONG lFlags, + _Out_ LONG* plDevErrVal) +{ + UNREFERENCED_PARAMETER(lFlags); + + HRESULT hr = S_OK; + LONG lItemFlags = 0; + + WIAEX_TRACE_BEGIN; + + if ((!pWiasContext) || (!plDevErrVal)) + { + hr = E_INVALIDARG; + WIAEX_ERROR((g_hInst, "Invalid parameter, hr = 0x%08X", hr)); + } + + if (SUCCEEDED(hr)) + { + *plDevErrVal = 0; + + // + // Read WIA_IPA_ITEM_FLAGS to identify the item to be initialized: + // + hr = wiasReadPropLong(pWiasContext, WIA_IPA_ITEM_FLAGS, &lItemFlags, NULL, TRUE); + if (FAILED(hr)) + { + WIAEX_ERROR((g_hInst, "Failed to read WIA_IPA_ITEM_FLAGS property, hr = 0x%08X", hr)); + } + } + + if (SUCCEEDED(hr)) + { + if (lItemFlags & WiaItemTypeRoot) + { + // + // This is the Root item, initialize the Root item properties as well as the + // Root mini-driver item context containing the scan destination names: + // + + WIAS_TRACE((g_hInst,"IWiaMiniDrv::drvInitItemProperties called for Root..")); + + hr = InitializeRootItemProperties(pWiasContext); + if (FAILED(hr)) + { + WIAEX_ERROR((g_hInst, "Failed to initialize root item properties, hr = 0x%08X", hr)); + } + } + else if ((lItemFlags & WiaItemTypeProgrammableDataSource) && + (lItemFlags & WiaItemTypeTransfer) && + (lItemFlags & WiaItemTypeFile)) + { + // + // This is a child programmable data source item - detect which one from the item name: + // + + IWiaDrvItem *pIWiaDrvItem = NULL; + BSTR bstrItemName = NULL; + + hr = wiasGetDrvItem(pWiasContext, &pIWiaDrvItem); + if (FAILED(hr)) + { + WIAEX_ERROR((g_hInst, "Failed to retrieve the current driver item to initialize, hr = 0x%08X", hr)); + } + + if (SUCCEEDED(hr)) + { + hr = pIWiaDrvItem->GetItemName(&bstrItemName); + if (FAILED (hr)) + { + WIAEX_ERROR((g_hInst, "Failed to get the item name, hr = 0x%08X", hr)); + } + } + + if (SUCCEEDED(hr)) + { + if (!wcscmp(WIA_DRIVER_FLATBED_NAME, bstrItemName)) + { + WIAS_TRACE((g_hInst,"IWiaMiniDrv::drvInitItemProperties called for Flatbed..")); + + hr = InitializeChildItemProperties(pWiasContext, FLAT); + if (FAILED(hr)) + { + WIAEX_ERROR((g_hInst, "Failed to initialize the flatbed item's property set, hr = 0x%08X", hr)); + } + } + else if (!wcscmp(WIA_DRIVER_FEEDER_NAME, bstrItemName)) + { + WIAS_TRACE((g_hInst,"IWiaMiniDrv::drvInitItemProperties called for Feeder..")); + + hr = InitializeChildItemProperties(pWiasContext, FEED); + if (FAILED(hr)) + { + WIAEX_ERROR((g_hInst, "Failed to initialize the feeder item's property set, hr = 0x%08X", hr)); + } + } + else if (!wcscmp(WIA_DRIVER_AUTO_NAME, bstrItemName)) + { + WIAS_TRACE((g_hInst,"IWiaMiniDrv::drvInitItemProperties called for Auto..")); + + hr = InitializeChildItemProperties(pWiasContext, AUTO_SOURCE); + if (FAILED(hr)) + { + WIAEX_ERROR((g_hInst, "Failed to initialize the automatic input source item's property set, hr = 0x%08X", hr)); + } + } + else if (!wcscmp(WIA_DRIVER_IMPRINTER_NAME, bstrItemName)) + { + WIAS_TRACE((g_hInst,"IWiaMiniDrv::drvInitItemProperties called for Imprinter..")); + + hr = InitializeChildItemProperties(pWiasContext, IMPRINTER); + if (FAILED(hr)) + { + WIAEX_ERROR((g_hInst, "Failed to initialize the imprinter item's property set, hr = 0x%08X", hr)); + } + } + else if (!wcscmp(WIA_DRIVER_ENDORSER_NAME, bstrItemName)) + { + WIAS_TRACE((g_hInst,"IWiaMiniDrv::drvInitItemProperties called for Endorser..")); + + hr = InitializeChildItemProperties(pWiasContext, ENDORSER); + if (FAILED(hr)) + { + WIAEX_ERROR((g_hInst, "Failed to initialize the endorser item's property set, hr = 0x%08X", hr)); + } + } + else if (!wcscmp(WIA_DRIVER_BARCODE_READER_NAME, bstrItemName)) + { + WIAS_TRACE((g_hInst,"IWiaMiniDrv::drvInitItemProperties called for Barcode Reader..")); + + hr = InitializeChildItemProperties(pWiasContext, BARCODE_READER); + if (FAILED(hr)) + { + WIAEX_ERROR((g_hInst, "Failed to initialize the barcode reader item's property set, hr = 0x%08X", hr)); + } + } + else if (!wcscmp(WIA_DRIVER_PATCH_CODE_READER_NAME, bstrItemName)) + { + WIAS_TRACE((g_hInst,"IWiaMiniDrv::drvInitItemProperties called for Patch Code Reader..")); + + hr = InitializeChildItemProperties(pWiasContext, PATCH_CODE_READER); + if (FAILED(hr)) + { + WIAEX_ERROR((g_hInst, "Failed to initialize the patch code reader item's property set, hr = 0x%08X", hr)); + } + } + else if (!wcscmp(WIA_DRIVER_MICR_READER_NAME, bstrItemName)) + { + WIAS_TRACE((g_hInst,"IWiaMiniDrv::drvInitItemProperties called for MICR Reader..")); + + hr = InitializeChildItemProperties(pWiasContext, MICR_READER); + if (FAILED(hr)) + { + WIAEX_ERROR((g_hInst, "Failed to initialize the MICR reader item's property set, hr = 0x%08X", hr)); + } + } + else + { + hr = E_INVALIDARG; + WIAEX_ERROR((g_hInst, "Unsupported item (item name: %ws), hr = 0x%08X", bstrItemName, hr)); + } + + if (bstrItemName) + { + SysFreeString(bstrItemName); + } + } + } + else if (lItemFlags & WiaItemTypeGenerated) + { + hr = E_INVALIDARG; + WIAEX_ERROR((g_hInst, "WiaItemTypeGenerated items are not supported by this driver, hr = 0x%08X", hr)); + } + else + { + hr = E_INVALIDARG; + WIAEX_ERROR((g_hInst, "Unsupported item (item flags: 0x%X), hr = 0x%08X", lItemFlags, hr)); + } + } + + if (FAILED(hr)) + { + m_hrLastEdviceError = hr; + } + + WIAEX_TRACE((g_hInst, "IWiaMiniDrv::drvInitItemProperties 0x%08X", hr)); + + return hr; +} + +/**************************************************************************\ +* +* Implements IWiaMiniDrv::drvValidateItemProperties. The WIA Service calls +* IWiaMinIDrv::drvValidateItemProperties for properties that an application +* requested to be changed through a IWiaPropertyStorage::WriteMultiple call. +* The driver should validate each individual set request against the set of +* valid property values in the current context and if validation is successful +* it must update all dependent properties. +* +* Parameters: +* +* pWiasContext - pointer to the item context +* lFlags - reserved (set to 0) +* nPropSpec - indicates the number of properties in the pPropSpec array +* pPropSpec - list of PROPSPEC elements for the properties to be validated +* plDevErrVal - always set to 0 by this driver (drvGetDeviceErrorStr unsupported) +* +* Return Value: +* +* S_OK if successful, an error HRESULT otherwise +* +\**************************************************************************/ + +HRESULT CWiaDriver::drvValidateItemProperties( + _Inout_ BYTE *pWiasContext, + LONG lFlags, + ULONG nPropSpec, + _In_reads_(nPropSpec) const PROPSPEC *pPropSpec, + _Out_ LONG *plDevErrVal) +{ + UNREFERENCED_PARAMETER(lFlags); + + HRESULT hr = S_OK; + WIA_PROPERTY_CONTEXT PropertyContext = {}; + PROPID *pPropID = NULL; + BOOL bPropertyContext = FALSE; + LONG lDocumentHandlingSelect = FLAT; + LONG lItemType = 0; + + WIAEX_TRACE_BEGIN; + + if ((!pWiasContext) || (!pPropSpec) || (!plDevErrVal) || (!nPropSpec)) + { + hr = E_INVALIDARG; + WIAEX_ERROR((g_hInst, "Invalid parameter, hr = 0x%08X", hr)); + } + + if (SUCCEEDED(hr)) + { + *plDevErrVal = 0; + + hr = wiasGetItemType(pWiasContext, &lItemType); + if (FAILED(hr)) + { + WIAEX_ERROR((g_hInst, "Failed to get item type, hr = 0x%08X", hr)); + } + } + + if (SUCCEEDED(hr)) + { + if (lItemType & WiaItemTypeRoot) + { + // + // Root item properties for this sample driver do not need any additional validation: + // + hr = S_OK; + } + else + { + GUID guidItemCategory = {}; + + // + // Read WIA_IPA_ITEM_CATEGORY to figure out which child item this is + // (the item names can be also used for this identification purpose, + // and should be used if there is more than one item with the same + // item category): + // + hr = wiasReadPropGuid(pWiasContext, WIA_IPA_ITEM_CATEGORY, &guidItemCategory, NULL, TRUE); + if (FAILED(hr)) + { + WIAEX_ERROR((g_hInst, "Error reading current WIA_IPA_ITEM_CATEGORY, hr = 0x%08X", hr)); + } + + // + // We need to create an array of property IDs for the properties to be added to the default + // ones existing in the property context to be built with wiasCreatePropContext + // + if (SUCCEEDED(hr)) + { + pPropID = (PROPID*) CoTaskMemAlloc(sizeof(PROPID) * nPropSpec); + if (pPropID) + { + for (ULONG i = 0; i < nPropSpec; i++) + { + pPropID[i] = pPropSpec[i].propid; + } + } + else + { + hr = E_OUTOFMEMORY; + WIAEX_ERROR((g_hInst, "Out of memory, hr = 0x%08X", hr)); + } + } + + // + // Create a propery context for the properties being validated: + // + if (SUCCEEDED(hr)) + { + if (IsEqualGUID(WIA_CATEGORY_FLATBED, guidItemCategory)) + { + lDocumentHandlingSelect = FLAT; + } + else if (IsEqualGUID(WIA_CATEGORY_FEEDER, guidItemCategory)) + { + lDocumentHandlingSelect = FEED; + } + else if (IsEqualGUID(WIA_CATEGORY_AUTO, guidItemCategory)) + { + lDocumentHandlingSelect = AUTO_SOURCE; + } + else if (IsEqualGUID(WIA_CATEGORY_IMPRINTER, guidItemCategory)) + { + lDocumentHandlingSelect = IMPRINTER; + } + else if (IsEqualGUID(WIA_CATEGORY_ENDORSER, guidItemCategory)) + { + lDocumentHandlingSelect = ENDORSER; + } + else if (IsEqualGUID(WIA_CATEGORY_BARCODE_READER, guidItemCategory)) + { + lDocumentHandlingSelect = BARCODE_READER; + } + else if (IsEqualGUID(WIA_CATEGORY_PATCH_CODE_READER, guidItemCategory)) + { + lDocumentHandlingSelect = PATCH_CODE_READER; + } + else if (IsEqualGUID(WIA_CATEGORY_MICR_READER, guidItemCategory)) + { + lDocumentHandlingSelect = MICR_READER; + } + + hr = wiasCreatePropContext(nPropSpec, (PROPSPEC*)pPropSpec, nPropSpec, pPropID, &PropertyContext); + if (FAILED(hr)) + { + WIAEX_ERROR((g_hInst, "Failed to create WIA property context to validate %u properties, hr = 0x%08X", nPropSpec, hr)); + } + else + { + bPropertyContext = TRUE; + } + } + + // + // Validate format properties and update as necessary: + // + // WIA_IPA_DATATYPE + // WIA_IPA_DEPTH + // WIA_IPA_CHANNELS_PER_PIXEL + // WIA_IPA_BITS_PER_CHANNEL + // WIA_IPA_FORMAT + // WIA_IPA_FILENAME_EXTENSION + // WIA_IPA_TYMED + // WIA_IPA_COMPRESSION + // + if (SUCCEEDED(hr)) + { + hr = ValidateFormatProperties(pWiasContext, &PropertyContext, lDocumentHandlingSelect); + if (FAILED(hr)) + { + WIAEX_ERROR((g_hInst, "Failed to validate format properties, hr = 0x%08X", hr)); + } + } + + if ((FLAT == lDocumentHandlingSelect) || (FEED == lDocumentHandlingSelect)) + { + // + // Validate scan region/document size properties: + // + // WIA_IPS_PAGE_SIZE + // WIA_IPS_ORIENTATION + // WIA_IPS_PAGE_WIDTH + // WIA_IPS_PAGE_HEIGHT + // WIA_IPS_XPOS + // WIA_IPS_YPOS + // WIA_IPS_XEXTENT + // WIA_IPS_YEXTENT + // WIA_IPS_XRES + // WIA_IPS_YRES + // WIA_IPS_XSCALING + // WIA_IPS_YSCALING + // WIA_IPS_LONG_DOCUMENT + // + if (SUCCEEDED(hr)) + { + hr = ValidateRegionProperties(pWiasContext, &PropertyContext, lDocumentHandlingSelect); + if (FAILED(hr)) + { + WIAEX_ERROR((g_hInst, "Failed to validate region properties, hr = 0x%08X", hr)); + } + } + + // + // Validate image information properties: + // + // WIA_IPA_PIXELS_PER_LINE + // WIA_IPA_NUMBER_OF_LINES + // WIA_IPA_BYTES_PER_LINE + // + if (SUCCEEDED(hr)) + { + hr = ValidateImageInfoProperties(pWiasContext, &PropertyContext, lDocumentHandlingSelect); + if (FAILED(hr)) + { + WIAEX_ERROR((g_hInst, "Failed to validate image information properties, hr = 0x%08X", hr)); + } + } + + // + // Validate color drop properties: + // + // WIA_IPS_COLOR_DROP_RED + // WIA_IPS_COLOR_DROP_GREEN and + // WIA_IPS_COLOR_DROP_BLUE + // + if (SUCCEEDED(hr)) + { + hr = ValidateColorDropProperties(pWiasContext, &PropertyContext, lDocumentHandlingSelect); + if (FAILED(hr)) + { + WIAEX_ERROR((g_hInst, "Failed to validate color drop properties, hr = 0x%08X", hr)); + } + } + + // + // Validate other feeder specific properties: + // + // WIA_IPS_DOCUMENT_HANDLING_SELECT + // WIA_IPS_PAGES + // + if (SUCCEEDED(hr) && (FEED == lDocumentHandlingSelect)) + { + hr = ValidateFeedProperties(pWiasContext, &PropertyContext); + if (FAILED(hr)) + { + WIAEX_ERROR((g_hInst, "Failed to validate feeder specific properties, hr = 0x%08X", hr)); + } + } + } + else if ((IMPRINTER == lDocumentHandlingSelect) || (ENDORSER == lDocumentHandlingSelect)) + { + hr = ValidateImprinterEndorserProperties(pWiasContext, &PropertyContext, lDocumentHandlingSelect); + if (FAILED(hr)) + { + WIAEX_ERROR((g_hInst, "Failed to validate imprinter/endorser specific properties, hr = 0x%08X", hr)); + } + } + else if (BARCODE_READER == lDocumentHandlingSelect) + { + hr = ValidateBarcodeReaderProperties(pWiasContext, &PropertyContext); + if (FAILED(hr)) + { + WIAEX_ERROR((g_hInst, "Failed to validate barcode reader specific properties, hr = 0x%08X", hr)); + } + } + else if (PATCH_CODE_READER == lDocumentHandlingSelect) + { + hr = ValidatePatchCodeReaderProperties(pWiasContext, &PropertyContext); + if (FAILED(hr)) + { + WIAEX_ERROR((g_hInst, "Failed to validate patch code reader specific properties, hr = 0x%08X", hr)); + } + } + else if (MICR_READER == lDocumentHandlingSelect) + { + hr = ValidateMicrReaderProperties(pWiasContext, &PropertyContext); + if (FAILED(hr)) + { + WIAEX_ERROR((g_hInst, "Failed to validate MICR reader specific properties, hr = 0x%08X", hr)); + } + } + + // + // Validate all changed properties against their (for some of the above properties) updated valid values: + // + if (SUCCEEDED(hr)) + { + hr = wiasValidateItemProperties(pWiasContext, nPropSpec, pPropSpec); + if (FAILED(hr)) + { + WIAEX_ERROR((g_hInst, "Failed to validate properties using wiasValidateItemProperties, hr = 0x%08X", hr)); + } + } + + // + // Free the property context created, if any: + // + if (bPropertyContext) + { + HRESULT FreePropContextHR = wiasFreePropContext(&PropertyContext); + if (FAILED(FreePropContextHR)) + { + WIAEX_ERROR((g_hInst, "wiasFreePropContext failed, hr = 0x%08X", FreePropContextHR)); + } + } + } + } + + if (pPropID) + { + CoTaskMemFree(pPropID); + } + + if (FAILED(hr)) + { + m_hrLastEdviceError = hr; + } + + WIAEX_TRACE((g_hInst, "IWiaMiniDrv::drvValidateItemProperties 0x%08X", hr)); + + return hr; +} + +/**************************************************************************\ +* +* Implements IWiaMiniDrv::drvWriteItemProperties. When this method is called +* the driver is given the chance to send to the scanner device the settings +* dictated by the current property values. +* +* Parameters: +* +* pWiasContext - pointer to the item context +* lFlags - reserved (set to 0) +* pmdtc - the device transfer context +* plDevErrVal - always set to 0 by this driver (drvGetDeviceErrorStr unsupported) +* +* Return Value: +* +* S_OK if successful, an error HRESULT otherwise +* +\**************************************************************************/ + +HRESULT CWiaDriver::drvWriteItemProperties( + _Inout_ BYTE* pWiasContext, + LONG lFlags, + _In_ PMINIDRV_TRANSFER_CONTEXT pmdtc, + _Out_ LONG* plDevErrVal) +{ + UNREFERENCED_PARAMETER(lFlags); + + HRESULT hr = S_OK; + LONG lItemType = 0; + + WIAEX_TRACE_BEGIN; + + if ((!pWiasContext) || (!pmdtc) || (!plDevErrVal)) + { + hr = E_INVALIDARG; + WIAEX_ERROR((g_hInst, "Invalid parameter, hr = 0x%08X", hr)); + } + + if (SUCCEEDED(hr)) + { + *plDevErrVal = 0; + + hr = wiasGetItemType(pWiasContext, &lItemType); + if (FAILED(hr)) + { + WIAEX_ERROR((g_hInst, "Failed to get item type, hr = 0x%08X", hr)); + } + } + + if (SUCCEEDED(hr) && (lItemType & WiaItemTypeRoot)) + { + hr = E_FAIL; + WIAEX_ERROR((g_hInst, "Acquisitions are not supported from the Root item, hr = 0x%08X", hr)); + } + + // + // Apply to the device the scan settings described by the current WIA property configuration. + // Note that this is not the best time to ask the scanner device to validate settings: validation + // should be performed during IWiaMiniDrv/CWiaDriver::drvValidateItemProperties. + // + // ... + // + + if (FAILED(hr)) + { + m_hrLastEdviceError = hr; + } + + WIAEX_TRACE((g_hInst, "IWiaMiniDrv::drvWriteItemProperties 0x%08X", hr)); + + return hr; +} + +/**************************************************************************\ +* +* Implements IWiaMiniDrv::drvReadItemProperties. Reads the device item +* properties. When a client application tries to read a WIA item's properties +* the WIA service will first notify the driver by calling this method. +* The driver should then update any property values that need to be updated +* in real-time from the device every time the application attempts to read +* them (e.g. WIA_DPS_DOCUMENT_HANDLING_STATUS). +* +* Parameters: +* +* pWiasContext - pointer to the item context +* lFlags - reserved (set to 0) +* nPropSpec - number of properties in pPropSpec array +* pPropSpec - list of properties to be read +* plDevErrVal - always set to 0 by this driver (drvGetDeviceErrorStr unsupported) +* +* Return Value: +* +* S_OK if successful, an error HRESULT otherwise +* +\**************************************************************************/ + +HRESULT CWiaDriver::drvReadItemProperties( + _In_ BYTE* pWiasContext, + LONG lFlags, + ULONG nPropSpec, + _In_ const PROPSPEC* pPropSpec, + _Out_ LONG* plDevErrVal) +{ + UNREFERENCED_PARAMETER(nPropSpec); + UNREFERENCED_PARAMETER(lFlags); + + HRESULT hr = S_OK; + LONG lItemFlags = 0; + + // + // Omitted on pupose, not really usefull without full property information: + // + // WIAEX_TRACE_BEGIN; + // + + if ((!pWiasContext) || (!pPropSpec) || (!plDevErrVal)) + { + hr = E_INVALIDARG; + WIAEX_ERROR((g_hInst, "Invalid parameter, hr = 0x%08X", hr)); + } + + if (SUCCEEDED(hr)) + { + *plDevErrVal = 0; + + hr = wiasReadPropLong(pWiasContext, WIA_IPA_ITEM_FLAGS, &lItemFlags, NULL, TRUE); + if (FAILED(hr)) + { + WIAEX_ERROR((g_hInst, "Failed to read WIA_IPA_ITEM_FLAGS property, hr = 0x%08X", hr)); + } + } + + if (SUCCEEDED(hr)) + { + // + // The following properties require to be updated at run-time: + // + // For the Root item: + // + // WIA_DPS_DOCUMENT_HANDLING_STATUS (*) + // WIA_DPA_CONNECT_STATUS (*) + // WIA_DPS_SCAN_AVAILABLE_ITEM + // + // * - not updated by this sample driver since no HW device connection exists, + // but should be updated by a real scanner driver + // + // For the Flatbed and Feeder items: + // + // None + // + + if (lItemFlags & WiaItemTypeRoot) + { + // + // Update WIA_DPS_SCAN_AVAILABLE_ITEM with the last globally stored + // (per driver instance) item name signaled with an unconsumed scan ready event: + // + hr = UpdateScanAvailableItemProperty(pWiasContext); + if (FAILED(hr)) + { + WIAEX_ERROR((g_hInst, "Failed to update the WIA_DPS_SCAN_AVAILABLE_ITEM property (%ws), hr = 0x%08X", + m_bstrScanAvailableItem ? m_bstrScanAvailableItem : L"<empty string>", hr)); + } + } + } + + if (FAILED(hr)) + { + m_hrLastEdviceError = hr; + } + + WIAEX_TRACE((g_hInst, "IWiaMiniDrv::drvReadItemProperties 0x%08X", hr)); + + return hr; +} + +/**************************************************************************\ +* +* Implements IWiaMiniDrv::drvLockWiaDevice. The IWiaMiniDrv::drvLockWiaDevice +* method locks the hardware device so that only the current minidriver can +* access it. This sample driver returns S_OK without doing anything special. +* Note that the WIA Service expects this method to succeed for a properly +* installed driver and a working scanner device. See also IStiUSD::LockDevice. +* +* Parameters: +* +* pWiasContext - pointer to the item context +* lFlags - reserved (set to 0) +* plDevErrVal - always set to 0 by this driver (drvGetDeviceErrorStr unsupported) +* +* Return Value: +* +* S_OK +* +\**************************************************************************/ + +HRESULT CWiaDriver::drvLockWiaDevice( + _In_ BYTE* pWiasContext, + LONG lFlags, + _Out_ LONG* plDevErrVal) +{ + UNREFERENCED_PARAMETER(pWiasContext); + UNREFERENCED_PARAMETER(lFlags); + + *plDevErrVal = 0; + + return S_OK; +} + +/**************************************************************************\ +* +* Implements IWiaMiniDrv::drvUnLockWiaDevice. The sample driver returns S_OK. +* The WIA Service expects this method to succeed for a properly installed +* driver and a working scanner device). See also IStiUSD::UnlockDevice. +* +* Parameters: +* +* pWiasContext - pointer to the item context +* lFlags - reserved (set to 0) +* plDevErrVal - always set to 0 by this driver (drvGetDeviceErrorStr unsupported) +* +* Return Value: +* +* S_OK +* +\**************************************************************************/ + +HRESULT CWiaDriver::drvUnLockWiaDevice( + _In_ BYTE* pWiasContext, + LONG lFlags, + _Out_ LONG* plDevErrVal) +{ + UNREFERENCED_PARAMETER(pWiasContext); + UNREFERENCED_PARAMETER(lFlags); + + *plDevErrVal = 0; + + return S_OK; +} + +/**************************************************************************\ +* +* Implements IWiaMiniDrv::drvAnalyzeItem. This sample driver returns +* E_NOTIMPL as it does not support image item analysis. +* +* Parameters: +* +* pWiasContext - pointer to the item context +* lFlags - reserved (set to 0) +* plDevErrVal - always set to 0 by this driver (drvGetDeviceErrorStr unsupported) +* +* Return Value: +* +* E_NOTIMPL +* +\**************************************************************************/ + +HRESULT CWiaDriver::drvAnalyzeItem( + _In_ BYTE* pWiasContext, + LONG lFlags, + _Out_ LONG* plDevErrVal) +{ + UNREFERENCED_PARAMETER(pWiasContext); + UNREFERENCED_PARAMETER(lFlags); + + WIAEX_ERROR((g_hInst, "IWiaMiniDrv::drvAnalyzeItem, this method is not implemented or supported for this driver")); + + m_hrLastEdviceError = STIERR_UNSUPPORTED; + + *plDevErrVal = 0; + + return E_NOTIMPL; +} + +/**************************************************************************\ +* +* Implements IWiaMiniDrv::drvGetDeviceErrorStr. This driver returns +* E_NOTIMPL because no localized text descriptions of the generic errors +* signaled by IWiaMiniDrv calls are available. +* +* Parameters: +* +* lFlags - reserved (set to 0) +* lDevErrVal - the device error value to be mapped to a string +* ppszDevErrStr - receives the address of a string describing the error +* plDevErr - a status code for this method +* +* Return Value: +* +* E_NOTIMPL +* +\**************************************************************************/ + +HRESULT CWiaDriver::drvGetDeviceErrorStr( + LONG lFlags, + LONG lDevErrVal, + _Out_ LPOLESTR* ppszDevErrStr, + _Out_ LONG* plDevErr) +{ + UNREFERENCED_PARAMETER(lFlags); + UNREFERENCED_PARAMETER(lDevErrVal); + + WIAEX_ERROR((g_hInst, "IWiaMiniDrv::drvGetDeviceErrorStr, this method is not implemented or supported for this driver")); + + if (plDevErr) + { + *plDevErr = WIA_ERROR_INVALID_COMMAND; + } + + if (ppszDevErrStr) + { + *ppszDevErrStr = NULL; + } + + m_hrLastEdviceError = STIERR_UNSUPPORTED; + + return E_NOTIMPL; +} + +/**************************************************************************\ +* +* Helper for CWiaDriver::drvUnInitializeWia. Destroys the Driver Item Tree. +* +* Parameters: +* +* None +* +* Return Value: +* +* S_OK if successful, an error HRESULT otherwise +* +\**************************************************************************/ + +HRESULT CWiaDriver::DestroyDriverItemTree() +{ + HRESULT hr = S_OK; + + WIAEX_TRACE_BEGIN; + + // + // By design the WIA service allows an application to release the Root item at the + // same time as the WIA service releases the WIA driver object following a device + // disconnection. If there are no other applications connected to the driver the + // driver would attempt to unlink and release the Root item concurrently from two + // different threads - one thread executing IWiaMiniDrv::drvUnInitializeWia, the + // other thread executing INonDelegating::NonDelegatingRelease: + // + EnterCriticalSection(&m_csDestroyDriverItemTree); + + if (m_pIDrvItemRoot) + { + WIAS_TRACE((g_hInst,"Unlinking WIA item tree")); + + hr = m_pIDrvItemRoot->UnlinkItemTree(WiaItemTypeDisconnected); + if (FAILED(hr)) + { + WIAEX_ERROR((g_hInst, "Failed to unlink WIA item tree before being released, hr = 0x%08X", hr)); + } + + // + // Proceed releasing the Root item even if the tree could not be unlinked: + // + + WIAS_TRACE((g_hInst, "Releasing IDrvItemRoot interface")); + + __try + { + m_pIDrvItemRoot->Release(); + } +#pragma prefast(suppress:__WARNING_EXCEPTIONEXECUTEHANDLER, "Note that EXCEPTION_EXECUTE_HANDLER may mask exceptions that may be individually handled otherwise") + __except (EXCEPTION_EXECUTE_HANDLER) + { + hr = WIA_ERROR_ITEM_DELETED; + WIAEX_ERROR((g_hInst, "Exception 0x%08X when calling Release on the Root item, item no longer valid, hr = 0x%08X", + GetExceptionCode(), hr)); + } + + m_pIDrvItemRoot = NULL; + + // + // Keep the current scanner configuration data as well as the transfer format + // information array initialized after it, until the scanner device signals + // that the configuration has been changed or the driver is unloaded. + // + } + + if (FAILED(hr)) + { + m_hrLastEdviceError = hr; + } + + LeaveCriticalSection(&m_csDestroyDriverItemTree); + + WIAEX_TRACE_FUNC_HR; + + return hr; +} + +/**************************************************************************\ +* +* Helper for CWiaDriver::drvInitializeWia. Creates the Driver Item Tree. +* Called during IWiaMiniDrv::drvInitializeWia when no Driver Item Tree exists +* and also during IWiaMiniDrv::drvDeviceCommand for WIA_CMD_SYNCHRONIZE and +* WIA_CMD_BUILD_DEVICE_TREE. Note that the scanner configuration can be read +* for the first time (in this driver session) during IStiUSD::Initialize. +* +* Parameters: +* +* None +* +* Return Value: +* +* S_OK if successful, an error HRESULT otherwise +* +\**************************************************************************/ + +HRESULT CWiaDriver::BuildDriverItemTree() +{ + HRESULT hr = S_OK; + BSTR bstrRootItemName = NULL; + WIA_DRIVER_ITEM_CONTEXT *pWiaDriverItemContext = NULL; + + // + // All child items implemented by this sample driver except the Auto, Barcode, Patch Code and MICR Reader + // items, support all item flags as the Flatbed and Feeder items do minus the WiaItemTypeImage flag. The + // Imprinter and Endorser items support the same item flags as Flatbed and Feeder, including WiaItemTypeImage, + // since these sample Imprinter and Endorser items support graphics data transfers. + // + const LONG lRootItemFlags = WiaItemTypeFolder | WiaItemTypeDevice | WiaItemTypeRoot; + const LONG lCommonChildItemFlags = WiaItemTypeTransfer | WiaItemTypeFile | WiaItemTypeProgrammableDataSource; + + WIAEX_TRACE_BEGIN; + + // + // The method creates the Driver Item Tree only if it doesn't exist: + // + if (!m_pIDrvItemRoot) + { + WIAS_TRACE((g_hInst, "Building Driver Item Tree....")); + + if (!m_bInitialized) + { + hr = E_UNEXPECTED; + WIAEX_ERROR((g_hInst, "Driver not fully initialized, cannot create Driver Item Tree, hr = 0x%08X", hr)); + } + + // + // Reinitialize the WIA_FORMAT_INFO arrays: + // + if (SUCCEEDED(hr)) + { + hr = InitializeFormatInfoArrays(); + if (FAILED(hr)) + { + WIAEX_ERROR((g_hInst, "Failed to initialize WIA_FORMAT_INFO array, hr = 0x%08X", hr)); + } + } + + // + // Create the default WIA root item. Note that we need item context data for the root item as well as children: + // + + if (SUCCEEDED(hr)) + { + bstrRootItemName = SysAllocString(WIA_DRIVER_ROOT_NAME); + if (!bstrRootItemName) + { + hr = E_OUTOFMEMORY; + WIAEX_ERROR((g_hInst, "Failed to allocate memory for the root item name, hr = 0x%08X", hr)); + } + } + + if (SUCCEEDED(hr)) + { + hr = wiasCreateDrvItem(lRootItemFlags, bstrRootItemName, m_bstrRootFullItemName, + (IWiaMiniDrv*)this, sizeof(WIA_DRIVER_ITEM_CONTEXT), + (BYTE **)&pWiaDriverItemContext, &m_pIDrvItemRoot); + if (SUCCEEDED(hr) && ((!pWiaDriverItemContext) || (!m_pIDrvItemRoot))) + { + hr = E_POINTER; + } + if (FAILED(hr)) + { + WIAEX_ERROR((g_hInst, "Failed to create the WIA root item (hr = 0x%08X)", hr)); + } + } + + // + // Initialize the item context data for the root item: + // + if (SUCCEEDED(hr)) + { + memset(pWiaDriverItemContext, 0, sizeof(WIA_DRIVER_ITEM_CONTEXT)); + + // + // The Root item is not using this image cache as it does not allow uploads (or download transfers): + // + pWiaDriverItemContext->m_pUploadedImage = NULL; + } + + // + // Create child items that represent programmable data sources: + // + + if (SUCCEEDED(hr)) + { + hr = CreateWIAChildItem(WIA_DRIVER_FLATBED_NAME, (IWiaMiniDrv*)this, m_pIDrvItemRoot, + WiaItemTypeImage | lCommonChildItemFlags, WIA_CATEGORY_FLATBED, NULL); + if (FAILED(hr)) + { + WIAEX_ERROR((g_hInst, "Failed to create the Flatbed item, hr = 0x%08X", hr)); + } + } + + if (SUCCEEDED(hr)) + { + hr = CreateWIAChildItem(WIA_DRIVER_FEEDER_NAME, (IWiaMiniDrv*)this, m_pIDrvItemRoot, + WiaItemTypeImage | lCommonChildItemFlags, WIA_CATEGORY_FEEDER, NULL); + if (FAILED(hr)) + { + WIAEX_ERROR((g_hInst, "Failed to create the Feeder item, hr = 0x%08X", hr)); + } + } + + if (SUCCEEDED(hr)) + { + hr = CreateWIAChildItem(WIA_DRIVER_AUTO_NAME, (IWiaMiniDrv*)this, m_pIDrvItemRoot, + lCommonChildItemFlags, WIA_CATEGORY_AUTO, NULL); + if (FAILED(hr)) + { + WIAEX_ERROR((g_hInst, "Failed to create the Auto item, hr = 0x%08X", hr)); + } + } + + if (SUCCEEDED(hr)) + { + hr = CreateWIAChildItem(WIA_DRIVER_IMPRINTER_NAME, (IWiaMiniDrv*)this, m_pIDrvItemRoot, + WiaItemTypeImage | lCommonChildItemFlags, WIA_CATEGORY_IMPRINTER, NULL); + if (FAILED(hr)) + { + WIAEX_ERROR((g_hInst, "Failed to create the Imprinter item, hr = 0x%08X", hr)); + } + } + + if (SUCCEEDED(hr)) + { + hr = CreateWIAChildItem(WIA_DRIVER_ENDORSER_NAME, (IWiaMiniDrv*)this, m_pIDrvItemRoot, + WiaItemTypeImage | lCommonChildItemFlags, WIA_CATEGORY_ENDORSER, NULL); + if (FAILED(hr)) + { + WIAEX_ERROR((g_hInst, "Failed to create the Endorser item, hr = 0x%08X", hr)); + } + } + + if (SUCCEEDED(hr)) + { + hr = CreateWIAChildItem(WIA_DRIVER_BARCODE_READER_NAME, (IWiaMiniDrv*)this, m_pIDrvItemRoot, + lCommonChildItemFlags, WIA_CATEGORY_BARCODE_READER, NULL); + if (FAILED(hr)) + { + WIAEX_ERROR((g_hInst, "Failed to create the Barcode Reader item, hr = 0x%08X", hr)); + } + } + + if (SUCCEEDED(hr)) + { + hr = CreateWIAChildItem(WIA_DRIVER_PATCH_CODE_READER_NAME, (IWiaMiniDrv*)this, m_pIDrvItemRoot, + lCommonChildItemFlags, WIA_CATEGORY_PATCH_CODE_READER, NULL); + if (FAILED(hr)) + { + WIAEX_ERROR((g_hInst, "Failed to create the Path Code Reader item, hr = 0x%08X", hr)); + } + } + + if (SUCCEEDED(hr)) + { + hr = CreateWIAChildItem(WIA_DRIVER_MICR_READER_NAME, (IWiaMiniDrv*)this, m_pIDrvItemRoot, + lCommonChildItemFlags, WIA_CATEGORY_MICR_READER, NULL); + if (FAILED(hr)) + { + WIAEX_ERROR((g_hInst, "Failed to create the MICR Reader item, hr = 0x%08X", hr)); + } + } + + if (bstrRootItemName) + { + SysFreeString(bstrRootItemName); + } + } + + if (FAILED(hr)) + { + m_hrLastEdviceError = hr; + } + + WIAEX_TRACE_FUNC_HR; + + return hr; +} + +/**************************************************************************\ +* +* Implements IWiaMiniDrv::drvDeviceCommand. The method IWiaMiniDrv:: +* drvDeviceCommand is called by the WIA service to issue a WIA service +* or application generated command to the driver. The WIA service only +* calls the IWiaMiniDrv::drvDeviceCommand method for a command that the +* driver reports to be supported during IWiaMiniDrv::drvGetCapabilities. +* This driver creates or destroys the Driver Item Tree as requested. +* +* +* Parameters: +* +* pWiasContext - pointer to the item context +* lFlags - reserved (set to 0) +* pguidCommand - WIA command GUID +* ppWiaDrvItem - always set to NULL (this driver does not need to create +* an additional item when a WIA command is executed) +* plDevErrVal - always set to 0 by this driver (drvGetDeviceErrorStr unsupported) +* +* Return Value: +* +* S_OK if successful, an error HRESULT otherwise +* +\**************************************************************************/ + +HRESULT CWiaDriver::drvDeviceCommand( + _Inout_ BYTE* pWiasContext, + LONG lFlags, + _In_ const GUID* pguidCommand, + _Out_ IWiaDrvItem** ppWiaDrvItem, + _Out_ LONG* plDevErrVal) +{ + UNREFERENCED_PARAMETER(lFlags); + + HRESULT hr = S_OK; + + WIAEX_TRACE_BEGIN; + + if ((!pWiasContext) || (!pguidCommand) || (!plDevErrVal)) + { + hr = E_INVALIDARG; + WIAEX_ERROR((g_hInst, "Invalid parameter, hr = 0x%08X", hr)); + } + + // + // The following commands are supported by this driver: + // + // WIA_CMD_SYNCHRONIZE: deletes and recreates the Driver Item Tree + // WIA_CMD_DELETE_DEVICE_TREE: deletes the Driver Item Tree + // WIA_CMD_BUILD_DEVICE_TREE: creates the Driver Item Tree + // WIA_CMD_START_FEEDER: starts the scanner feeder motor, preparing for scan + // WIA_CMD_STOP_FEEDER: stops the scanner feeder motor + // + if (SUCCEEDED(hr)) + { + *plDevErrVal = 0; + *ppWiaDrvItem = NULL; + + if (IsEqualGUID(WIA_CMD_SYNCHRONIZE, *pguidCommand)) + { + WIAS_TRACE((g_hInst, "WIA_CMD_SYNCHRONIZE")); + + // + // Delete the current Driver Item Tree: + // + hr = DestroyDriverItemTree(); + if (FAILED(hr)) + { + WIAEX_ERROR((g_hInst, "Failed to delete the current DIT for WIA_CMD_SYNCHRONIZE, hr = 0x%08X", hr)); + } + + // + // Re-create the Driver Item Tree according with the current device configuration: + // + if (SUCCEEDED(hr)) + { + hr = BuildDriverItemTree(); + if (FAILED(hr)) + { + WIAEX_ERROR((g_hInst, "Failed to re-create the DIT for WIA_CMD_SYNCHRONIZE, hr = 0x%08X", hr)); + } + + // + // Queue tree updated event, regardless of whether BuildDriverItemTree succeeded, + // since we can't guarantee that the tree was left in the same condition: + // + QueueWIAEvent(pWiasContext, WIA_EVENT_TREE_UPDATED); + } + } + else if (IsEqualGUID(WIA_CMD_DELETE_DEVICE_TREE, *pguidCommand)) + { + WIAS_TRACE((g_hInst, "WIA_CMD_DELETE_DEVICE_TREE")); + + if (!m_pIDrvItemRoot) + { + hr = E_FAIL; + WIAEX_ERROR((g_hInst, "WIA_CMD_DELETE_DEVICE_TREE called when no DIT exists, hr = 0x%08X", hr)); + } + + if (SUCCEEDED(hr)) + { + hr = DestroyDriverItemTree(); + if (FAILED(hr)) + { + WIAEX_ERROR((g_hInst, "Failed to delete the current DIT for WIA_CMD_DELETE_DEVICE_TREE, hr = 0x%08X", hr)); + } + } + } + else if (IsEqualGUID(WIA_CMD_BUILD_DEVICE_TREE, *pguidCommand)) + { + WIAS_TRACE((g_hInst, "WIA_CMD_BUILD_DEVICE_TREE")); + + if (m_pIDrvItemRoot) + { + hr = E_FAIL; + WIAEX_ERROR((g_hInst, "WIA_CMD_BUILD_DEVICE_TREE called when DIT already exists, hr = 0x%08X", hr)); + } + + if (SUCCEEDED(hr)) + { + hr = BuildDriverItemTree(); + if (FAILED(hr)) + { + WIAEX_ERROR((g_hInst, "Failed to re-create the DIT for WIA_CMD_BUILD_DEVICE_TREE, hr = 0x%08X", hr)); + } + + // + // Queue tree updated event, regardless ofwhether BuildDriverItemTree succeeded, + // since we can't guarantee that the tree was left in the same condition: + // + QueueWIAEvent(pWiasContext, WIA_EVENT_TREE_UPDATED); + } + } + else if (IsEqualGUID(WIA_CMD_START_FEEDER, *pguidCommand) || IsEqualGUID(WIA_CMD_STOP_FEEDER, *pguidCommand)) + { + GUID guidItemCategory = GUID_NULL; + LONG lFeederMotorControl = WIA_FEEDER_CONTROL_AUTO; + + if (IsEqualGUID(WIA_CMD_START_FEEDER, *pguidCommand)) + { + WIAS_TRACE((g_hInst, "WIA_CMD_START_FEEDER")); + } + else + { + WIAS_TRACE((g_hInst, "WIA_CMD_STOP_FEEDER")); + } + + // + // The feeder motor commands are valid only on the Feeder item: + // + hr = wiasReadPropGuid(pWiasContext, WIA_IPA_ITEM_CATEGORY, &guidItemCategory, NULL, TRUE); + if (FAILED(hr)) + { + WIAEX_ERROR((g_hInst, "Failed to read WIA_IPA_ITEM_CATEGORY, hr = 0x%08X", hr)); + } + + if (SUCCEEDED(hr) && (!IsEqualGUID(guidItemCategory, WIA_CATEGORY_FEEDER))) + { + hr = WIA_ERROR_INVALID_COMMAND; + WIAEX_ERROR((g_hInst, "WIA_CMD_START/STOP_FEEDER commands are valid only on the Feeder item, hr = 0x%08X", hr)); + } + + // + // WIA_IPS_FEEDER_CONTROL must be set to WIA_FEEDER_CONTROL_MANUAL: + // + if (SUCCEEDED(hr)) + { + hr = wiasReadPropLong(pWiasContext, WIA_IPS_FEEDER_CONTROL, &lFeederMotorControl, NULL, TRUE); + if (FAILED(hr)) + { + WIAEX_ERROR((g_hInst, "Failed to read WIA_IPS_FEEDER_CONTROL property, hr = 0x%08X", hr)); + } + + if (SUCCEEDED(hr) && (WIA_FEEDER_CONTROL_MANUAL != lFeederMotorControl)) + { + hr = WIA_ERROR_INVALID_COMMAND; + WIAEX_ERROR((g_hInst, "WIA_CMD_START/STOP_FEEDER commands are valid only when WIA_IPS_FEEDER_CONTROL is set to WIA_FEEDER_CONTROL_MANUAL, hr = 0x%08X", hr)); + } + } + + if (SUCCEEDED(hr)) + { + if (IsEqualGUID(WIA_CMD_START_FEEDER, *pguidCommand)) + { + hr = StartFeeder(); + } + else + { + hr = StopFeeder(); + } + } + } + else + { + hr = E_NOTIMPL; + WIAEX_ERROR((g_hInst, "The requested WIA command is not implemented or supported by this driver")); + } + } + + if (FAILED(hr)) + { + m_hrLastEdviceError = hr; + } + + WIAEX_TRACE((g_hInst, "IWiaMiniDrv::drvDeviceCommand 0x%08X", hr)); + + return hr; +} + +/**************************************************************************\ +* +* Implements IWiaMiniDrv::drvGetCapabilities. The WIA service calls +* IWiaMiniDrv::drvGetCapabilities to obtain a list of hardware command +* capabilities and/or STI/WIA device events supported by the driver. +* +* Parameters: +* +* pWiasContext - pointer to the item context (may be NULL) +* lFlags - reserved (set to 0) +* pcelt - receives the number of elements in the array +* pointed to by the ppCapabilities parameter +* ppCapabilities - receives the address of the first element +* of an array of WIA_DEV_CAP_DRV structures that +* contain the GUIDs of events and commands that +* the device supports +* plDevErrVal - always set to 0 by this driver (drvGetDeviceErrorStr unsupported) +* +* Return Value: +* +* S_OK if successful, an error HRESULT otherwise +* +\**************************************************************************/ + +HRESULT CWiaDriver::drvGetCapabilities( + _In_opt_ BYTE* pWiasContext, + LONG ulFlags, + _Out_ LONG* pcelt, + _Out_ WIA_DEV_CAP_DRV** ppCapabilities, + _Out_ LONG* plDevErrVal) +{ + UNREFERENCED_PARAMETER(pWiasContext); + UNREFERENCED_PARAMETER(ulFlags); + + HRESULT hr = S_OK; + BOOL bAddCapabilities = FALSE; + BOOL bGetCommands = FALSE; + BOOL bGetEvents = FALSE; + + WIAEX_TRACE_BEGIN; + + // + // Note that pWiasContext may be NULL when the driver signals an event + // before the Driver Item Tree is created and WIA service makes this call. + // It is also unused so we won't verify it: + // + if ((!pcelt) || (!ppCapabilities) || (!plDevErrVal)) + { + hr = E_INVALIDARG; + WIAEX_ERROR((g_hInst, "Invalid parameter, hr = 0x%08X", hr)); + } + + if (SUCCEEDED(hr)) + { + *plDevErrVal = 0; + *pcelt = 0; + *ppCapabilities = NULL; + + bAddCapabilities = (BOOL)(!m_tCapabilityManager.GetNumCapabilities()); + } + + // + // Add WIA_EVENT_DEVICE_CONNECTED: + // + if (SUCCEEDED(hr) && bAddCapabilities) + { + hr = m_tCapabilityManager.AddCapability(WIA_EVENT_DEVICE_CONNECTED, IDS_EVENT_DEVICE_CONNECTED_NAME, IDS_EVENT_DEVICE_CONNECTED_DESCRIPTION, + WIA_NOTIFICATION_EVENT, (LPCWSTR)WIA_ICON_DEVICE_CONNECTED); + + if (FAILED(hr)) + { + WIAEX_ERROR((g_hInst, "Failed to add WIA_EVENT_DEVICE_CONNECTED to the list of capabilities, hr = 0x%08X", hr)); + } + } + + // + // Add WIA_EVENT_DEVICE_DISCONNECTED: + // + if (SUCCEEDED(hr) && bAddCapabilities) + { + hr = m_tCapabilityManager.AddCapability(WIA_EVENT_DEVICE_DISCONNECTED, IDS_EVENT_DEVICE_DISCONNECTED_NAME, + IDS_EVENT_DEVICE_DISCONNECTED_DESCRIPTION, WIA_NOTIFICATION_EVENT, (LPCWSTR)WIA_ICON_DEVICE_DISCONNECTED); + + if (FAILED(hr)) + { + WIAEX_ERROR((g_hInst, "Failed to add WIA_EVENT_DEVICE_DISCONNECTED to the list of capabilities, hr = 0x%08X", hr)); + } + } + + // + // Add WIA_EVENT_POWER_SUSPEND: + // + if (SUCCEEDED(hr) && bAddCapabilities) + { + hr = m_tCapabilityManager.AddCapability(WIA_EVENT_POWER_SUSPEND, IDS_EVENT_POWER_SUSPEND_NAME, IDS_EVENT_POWER_SUSPEND_DESCRIPTION, + WIA_NOTIFICATION_EVENT, (LPCWSTR)WIA_ICON_DEVICE_DISCONNECTED); + + if (FAILED(hr)) + { + WIAEX_ERROR((g_hInst, "Failed to add WIA_EVENT_POWER_SUSPEND to the list of capabilities, hr = 0x%08X", hr)); + } + } + + // + // Add WIA_EVENT_POWER_RESUME: + // + if (SUCCEEDED(hr) && bAddCapabilities) + { + hr = m_tCapabilityManager.AddCapability(WIA_EVENT_POWER_RESUME, IDS_EVENT_POWER_RESUME_NAME, IDS_EVENT_POWER_RESUME_DESCRIPTION, + WIA_NOTIFICATION_EVENT, (LPCWSTR)WIA_ICON_DEVICE_CONNECTED); + + if (FAILED(hr)) + { + WIAEX_ERROR((g_hInst, "Failed to add WIA_EVENT_POWER_RESUME to the list of capabilities, hr = 0x%08X", hr)); + } + } + + // + // Add WIA_EVENT_TREE_UPDATED: + // + if (SUCCEEDED(hr) && bAddCapabilities) + { + hr = m_tCapabilityManager.AddCapability(WIA_EVENT_TREE_UPDATED, IDS_EVENT_TREE_UPDATED_NAME, + IDS_EVENT_TREE_UPDATED_DESCRIPTION, WIA_NOTIFICATION_EVENT, (LPCWSTR)WIA_ICON_TREE_UPDATED); + + if (FAILED(hr)) + { + WIAEX_ERROR((g_hInst, "Failed to add WIA_EVENT_TREE_UPDATED to the list of capabilities, hr = 0x%08X", hr)); + } + } + + // + // The sample driver does not signal at run time any of the events initialized below: + // + // WIA_EVENT_SCAN_IMAGE + // WIA_EVENT_DEVICE_NOT_READY + // WIA_EVENT_DEVICE_READY + // WIA_EVENT_FLATBED_LID_OPEN + // WIA_EVENT_FLATBED_LID_CLOSED + // WIA_EVENT_FEEDER_LOADED + // WIA_EVENT_FEEDER_EMPTIED + // WIA_EVENT_COVER_OPEN + // WIA_EVENT_COVER_CLOSED + // + // To signal one of these events, set the m_hWiaEvent and then WIA will issue a IStiUSD::GetNotificationData + // to receive the GUID of the particular event that is signaled: + // + // if (!SetEvent(m_hWiaEvent)) + // { + // dwErr = ::GetLastError(); + // hr = HRESULT_FROM_WIN32(dwErr); + // if (SUCCEEDED(hr)) + // { + // hr = E_FAIL; + // } + // WIAEX_ERROR((g_hInst, "SetEvent(WiaEvent) failed (0x%08X), hr = 0x%08X", dwErr, hr)); + // } + // + // + + // + // Add WIA_EVENT_SCAN_IMAGE: + // + if (SUCCEEDED(hr) && bAddCapabilities) + { + hr = m_tCapabilityManager.AddCapability(WIA_EVENT_SCAN_IMAGE, IDS_EVENT_SCAN_IMAGE_NAME, IDS_EVENT_SCAN_IMAGE_DESCRIPTION, + WIA_NOTIFICATION_EVENT | WIA_ACTION_EVENT, (LPCWSTR)WIA_ICON_SCAN_BUTTON_PRESS); + + if (FAILED(hr)) + { + WIAEX_ERROR((g_hInst, "Failed to add WIA_EVENT_SCAN_IMAGE to the list of capabilities, hr = 0x%08X", hr)); + } + } + + // + // Add WIA_EVENT_DEVICE_NOT_READY: + // + if (SUCCEEDED(hr) && bAddCapabilities) + { + hr = m_tCapabilityManager.AddCapability(WIA_EVENT_DEVICE_NOT_READY, IDS_EVENT_DEVICE_NOT_READY_NAME, IDS_EVENT_DEVICE_NOT_READY_DESCRIPTION, + WIA_NOTIFICATION_EVENT, (LPCWSTR)WIA_ICON_DEVICE_NOT_READY); + + if (FAILED(hr)) + { + WIAEX_ERROR((g_hInst, "Failed to add WIA_EVENT_DEVICE_NOT_READY to the list of capabilities, hr = 0x%08X", hr)); + } + } + + // + // Add WIA_EVENT_DEVICE_READY: + // + if (SUCCEEDED(hr) && bAddCapabilities) + { + hr = m_tCapabilityManager.AddCapability(WIA_EVENT_DEVICE_READY, IDS_EVENT_DEVICE_READY_NAME, IDS_EVENT_DEVICE_READY_DESCRIPTION, + WIA_NOTIFICATION_EVENT, (LPCWSTR)WIA_ICON_DEVICE_READY); + + if (FAILED(hr)) + { + WIAEX_ERROR((g_hInst, "Failed to add WIA_EVENT_DEVICE_READY to the list of capabilities, hr = 0x%08X", hr)); + } + } + + // + // Add WIA_EVENT_FLATBED_LID_OPEN: + // + if (SUCCEEDED(hr) && bAddCapabilities) + { + hr = m_tCapabilityManager.AddCapability(WIA_EVENT_FLATBED_LID_OPEN, IDS_EVENT_FLATBED_LID_OPEN_NAME, IDS_EVENT_FLATBED_LID_OPEN_DESCRIPTION, + WIA_NOTIFICATION_EVENT, (LPCWSTR)WIA_ICON_FLATBED_LID_OPEN); + + if (FAILED(hr)) + { + WIAEX_ERROR((g_hInst, "Failed to add WIA_EVENT_FLATBED_LID_OPEN to the list of capabilities, hr = 0x%08X", hr)); + } + } + + // + // Add WIA_EVENT_FLATBED_LID_CLOSED: + // + if (SUCCEEDED(hr) && bAddCapabilities) + { + hr = m_tCapabilityManager.AddCapability(WIA_EVENT_FLATBED_LID_CLOSED, IDS_EVENT_FLATBED_LID_CLOSED_NAME, IDS_EVENT_FLATBED_LID_CLOSED_DESCRIPTION, + WIA_NOTIFICATION_EVENT, (LPCWSTR)WIA_ICON_FLATBED_LID_CLOSED); + + if (FAILED(hr)) + { + WIAEX_ERROR((g_hInst, "Failed to add WIA_EVENT_FLATBED_LID_CLOSED to the list of capabilities, hr = 0x%08X", hr)); + } + } + + // + // Add WIA_EVENT_FEEDER_LOADED: + // + if (SUCCEEDED(hr) && bAddCapabilities) + { + hr = m_tCapabilityManager.AddCapability(WIA_EVENT_FEEDER_LOADED, IDS_EVENT_FEEDER_LOADED_NAME, IDS_EVENT_FEEDER_LOADED_DESCRIPTION, + WIA_NOTIFICATION_EVENT, (LPCWSTR)WIA_ICON_FEEDER_LOADED); + + if (FAILED(hr)) + { + WIAEX_ERROR((g_hInst, "Failed to add WIA_EVENT_FEEDER_LOADED to the list of capabilities, hr = 0x%08X", hr)); + } + } + + // + // Add WIA_EVENT_FEEDER_EMPTIED: + // + if (SUCCEEDED(hr) && bAddCapabilities) + { + hr = m_tCapabilityManager.AddCapability(WIA_EVENT_FEEDER_EMPTIED, IDS_EVENT_FEEDER_EMPTIED_NAME, IDS_EVENT_FEEDER_EMPTIED_DESCRIPTION, + WIA_NOTIFICATION_EVENT, (LPCWSTR)WIA_ICON_FEEDER_EMPTIED); + + if (FAILED(hr)) + { + WIAEX_ERROR((g_hInst, "Failed to add WIA_EVENT_FEEDER_EMPTIED to the list of capabilities, hr = 0x%08X", hr)); + } + } + + // + // Add WIA_EVENT_COVER_OPEN: + // + if (SUCCEEDED(hr) && bAddCapabilities) + { + hr = m_tCapabilityManager.AddCapability(WIA_EVENT_COVER_OPEN, IDS_EVENT_COVER_OPEN_NAME, IDS_EVENT_COVER_OPEN_DESCRIPTION, + WIA_NOTIFICATION_EVENT, (LPCWSTR)WIA_ICON_COVER_OPEN); + + if (FAILED(hr)) + { + WIAEX_ERROR((g_hInst, "Failed to add WIA_EVENT_COVER_OPEN to the list of capabilities, hr = 0x%08X", hr)); + } + } + + // + // Add WIA_EVENT_COVER_CLOSED: + // + if (SUCCEEDED(hr) && bAddCapabilities) + { + hr = m_tCapabilityManager.AddCapability(WIA_EVENT_COVER_CLOSED, IDS_EVENT_COVER_CLOSED_NAME, IDS_EVENT_COVER_CLOSED_DESCRIPTION, + WIA_NOTIFICATION_EVENT, (LPCWSTR)WIA_ICON_COVER_CLOSED); + + if (FAILED(hr)) + { + WIAEX_ERROR((g_hInst, "Failed to add WIA_EVENT_COVER_CLOSED to the list of capabilities, hr = 0x%08X", hr)); + } + } + + // + // Add WIA_CMD_SYNCRONIZE: + // + if (SUCCEEDED(hr) && bAddCapabilities) + { + hr = m_tCapabilityManager.AddCapability(WIA_CMD_SYNCHRONIZE, IDS_CMD_SYNCHRONIZE_NAME, + IDS_CMD_SYNCHRONIZE_DESCRIPTION, 0, (LPCWSTR)WIA_ICON_SYNCHRONIZE); + + if (FAILED(hr)) + { + WIAEX_ERROR((g_hInst, "Failed to add WIA_CMD_SYNCHRONIZE to the list of capabilities, hr = 0x%08X", hr)); + } + } + + // + // Add WIA_CMD_DELETE_DEVICE_TREE: + // + if (SUCCEEDED(hr) && bAddCapabilities) + { + hr = m_tCapabilityManager.AddCapability(WIA_CMD_DELETE_DEVICE_TREE, IDS_CMD_DELETE_DEVICE_TREE_NAME, + IDS_CMD_DELETE_DEVICE_TREE_DESCRIPTION, 0, (LPCWSTR)WIA_ICON_DELETE_DEVICE_TREE); + + if (FAILED(hr)) + { + WIAEX_ERROR((g_hInst, "Failed to add WIA_CMD_DELETE_DEVICE_TREE to the list of capabilities, hr = 0x%08X", hr)); + } + } + + // + // Add WIA_CMD_BUILD_DEVICE_TREE: + // + if (SUCCEEDED(hr) && bAddCapabilities) + { + hr = m_tCapabilityManager.AddCapability(WIA_CMD_BUILD_DEVICE_TREE, IDS_CMD_BUILD_DEVICE_TREE_NAME, + IDS_CMD_BUILD_DEVICE_TREE_DESCRIPTION, 0, (LPCWSTR)WIA_ICON_BUILD_DEVICE_TREE); + + if (FAILED(hr)) + { + WIAEX_ERROR((g_hInst, "Failed to add WIA_CMD_BUILD_DEVICE_TREE to the list of capabilities, hr = 0x%08X", hr)); + } + } + + // + // Add WIA_CMD_START_FEEDER: + // + if (SUCCEEDED(hr) && bAddCapabilities) + { + hr = m_tCapabilityManager.AddCapability(WIA_CMD_START_FEEDER, IDS_CMD_START_FEEDER_NAME, + IDS_CMD_START_FEEDER_DESCRIPTION, 0, (LPCWSTR)WIA_ICON_START_FEEDER); + + if (FAILED(hr)) + { + WIAEX_ERROR((g_hInst, "Failed to add WIA_CMD_START_FEEDER to the list of capabilities, hr = 0x%08X", hr)); + } + } + + // + // Add WIA_CMD_STOP_FEEDER: + // + if (SUCCEEDED(hr) && bAddCapabilities) + { + hr = m_tCapabilityManager.AddCapability(WIA_CMD_STOP_FEEDER, IDS_CMD_STOP_FEEDER_NAME, + IDS_CMD_STOP_FEEDER_DESCRIPTION, 0, (LPCWSTR)WIA_ICON_STOP_FEEDER); + + if (FAILED(hr)) + { + WIAEX_ERROR((g_hInst, "Failed to add WIA_CMD_STOP_FEEDER to the list of capabilities, hr = 0x%08X", hr)); + } + } + + if (SUCCEEDED(hr)) + { + bGetCommands = (BOOL)(WIA_DEVICE_COMMANDS == (ulFlags & WIA_DEVICE_COMMANDS)); + bGetEvents = (BOOL)(WIA_DEVICE_EVENTS == (ulFlags & WIA_DEVICE_EVENTS)); + + if ((bGetCommands) && (bGetEvents)) + { + *ppCapabilities = m_tCapabilityManager.GetCapabilities(); + *pcelt = m_tCapabilityManager.GetNumCapabilities(); + WIAS_TRACE((g_hInst, "drvGetCapabilities, application is asking for Commands and Events, we have %d total capabilities", *pcelt)); + } + else if (bGetCommands) + { + *ppCapabilities = m_tCapabilityManager.GetCommands(); + *pcelt = m_tCapabilityManager.GetNumCommands(); + WIAS_TRACE((g_hInst, "drvGetCapabilities, application is asking for Commands, we have %d", *pcelt)); + } + else if (bGetEvents) + { + *ppCapabilities = m_tCapabilityManager.GetEvents(); + *pcelt = m_tCapabilityManager.GetNumEvents(); + WIAS_TRACE((g_hInst,"drvGetCapabilities, application is asking for Events, we have %d", *pcelt)); + } + } + + if (FAILED(hr)) + { + m_hrLastEdviceError = hr; + } + + WIAEX_TRACE((g_hInst, "IWiaMiniDrv::drvGetCapabilities 0x%08X (%u events, %u commands)", + hr, m_tCapabilityManager.GetNumEvents(), m_tCapabilityManager.GetNumCommands())); + + return hr; +} + +/**************************************************************************\ +* +* Implements IWiaMiniDrv::drvDeleteItem. Deletes a driver item. The items +* supported by this sample driver cannot be deleted by the application. +* +* Parameters: +* +* pWiasContext - pointer to the item context +* lFlags - reserved (set to 0) +* plDevErrVal - always set to 0 by this driver (drvGetDeviceErrorStr unsupported) +* +* Return Value: +* +* STG_E_ACCESSDENIED to signal access denied (items cannot be deleted) +* +\**************************************************************************/ + +HRESULT CWiaDriver::drvDeleteItem( + _Inout_ BYTE* pWiasContext, + LONG lFlags, + _Out_ LONG* plDevErrVal) +{ + UNREFERENCED_PARAMETER(lFlags); + UNREFERENCED_PARAMETER(pWiasContext); + + HRESULT hr = STG_E_ACCESSDENIED; + + WIAEX_ERROR((g_hInst, "This item cannot be deleted, hr = 0x%08X", hr)); + + m_hrLastEdviceError = hr; + + *plDevErrVal = 0; + + WIAEX_TRACE((g_hInst, "IWiaMiniDrv::drvDeleteItem 0x%08X", hr)); + + return hr; +} + +/**************************************************************************\ +* +* Implements IWiaMiniDrv::drvFreeDrvItemContext. When a driver item is +* deleted, the WIA service frees the driver item context. This method +* informs the driver that the context is ready to be freed. The driver +* must free any memory allocated for the given driver item context. +* The driver won�t support items that can be deleted by the application +* but this method is going to be called by the WIA service the entire +* item tree is released at the end of a session. +* +* Parameters: +* +* lFlags - reserved (set to 0) +* pSpecContext - points to a device-specific context +* plDevErrVal - always set to 0 by this driver (drvGetDeviceErrorStr unsupported) +* +* Return Value: +* +* S_OK +* +\**************************************************************************/ + +HRESULT CWiaDriver::drvFreeDrvItemContext( + LONG lFlags, + _In_reads_bytes_(sizeof(WIA_DRIVER_ITEM_CONTEXT)) + BYTE *pSpecContext, + _Out_ LONG *plDevErrVal) +{ + UNREFERENCED_PARAMETER(lFlags); + + *plDevErrVal = 0; + + WIA_DRIVER_ITEM_CONTEXT *pWiaDriverItemContext = (WIA_DRIVER_ITEM_CONTEXT *)pSpecContext; + + if (pWiaDriverItemContext && pWiaDriverItemContext->m_pUploadedImage) + { + pWiaDriverItemContext->m_pUploadedImage->Release(); + pWiaDriverItemContext->m_pUploadedImage = NULL; + } + + WIAS_TRACE((g_hInst, "IWiaMiniDrv::drvFreeDrvItemContext 0x%08X", S_OK)); + + // + // This method must not fail + // + + return S_OK; +} + +/**************************************************************************\ +* +* Implements IWiaMiniDrv::drvGetWiaFormatInfo. This method creates an array +* of WIA_FORMAT_INFO structures that describe the media types and image +* formats that the driver supports. +* +* Parameters: +* +* pWiasContext - points to a device-specific context +* lFlags - reserved (set to 0) +* pcelt - receives the number of items in the ppwfi array +* ppwfi - array of WIA_FORMAT_INFO structures filled on return +* plDevErrVal - always set to 0 by this driver (drvGetDeviceErrorStr unsupported) +* +* Return Value: +* +* S_OK if succeeds, a standard COM error code otherwise +* +\**************************************************************************/ + +HRESULT CWiaDriver::drvGetWiaFormatInfo( + _In_ BYTE* pWiasContext, + LONG lFlags, + _Out_ LONG* pcelt, + _Out_ WIA_FORMAT_INFO** ppwfi, + _Out_ LONG* plDevErrVal) +{ + UNREFERENCED_PARAMETER(lFlags); + + HRESULT hr = S_OK; + GUID guidItemCategory = WIA_CATEGORY_ROOT; + LONG lNumFormats = 0; + WIA_FORMAT_INFO *pFormatInfo = NULL; + + WIAEX_TRACE_BEGIN; + + if ((!plDevErrVal) || (!pcelt) || (!ppwfi)) + { + hr = E_INVALIDARG; + WIAEX_ERROR((g_hInst, "Invalid parameter, hr = 0x%08X", hr)); + } + + if (SUCCEEDED(hr)) + { + *plDevErrVal = 0; + } + + if (pWiasContext) + { + if (SUCCEEDED(hr)) + { + hr = wiasReadPropGuid(pWiasContext, WIA_IPA_ITEM_CATEGORY, &guidItemCategory, NULL, TRUE); + if (FAILED(hr)) + { + WIAEX_ERROR((g_hInst, "Error reading current WIA_IPA_ITEM_CATEGORY, hr = 0x%08X", hr)); + } + } + + // + // This method is allowed to be called only on a transfer capable child item: + // + if (SUCCEEDED(hr)) + { + if (IsEqualGUID(WIA_CATEGORY_FEEDER, guidItemCategory)) + { + WIAS_TRACE((g_hInst, "drvGetWiaFormatInfo called for the Feeder..", hr)); + } + else if (IsEqualGUID(WIA_CATEGORY_FLATBED, guidItemCategory)) + { + WIAS_TRACE((g_hInst, "drvGetWiaFormatInfo called for the Flatbed..", hr)); + } + else if (IsEqualGUID(WIA_CATEGORY_AUTO, guidItemCategory)) + { + WIAS_TRACE((g_hInst, "drvGetWiaFormatInfo called for the Auto image source..", hr)); + } + else if (IsEqualGUID(WIA_CATEGORY_IMPRINTER, guidItemCategory)) + { + WIAS_TRACE((g_hInst, "drvGetWiaFormatInfo called for the Imprinter..", hr)); + } + else if (IsEqualGUID(WIA_CATEGORY_ENDORSER, guidItemCategory)) + { + WIAS_TRACE((g_hInst, "drvGetWiaFormatInfo called for the Endorser..", hr)); + } + else if (IsEqualGUID(WIA_CATEGORY_BARCODE_READER, guidItemCategory)) + { + WIAS_TRACE((g_hInst, "drvGetWiaFormatInfo called for the Barcode Reader..", hr)); + } + else if (IsEqualGUID(WIA_CATEGORY_PATCH_CODE_READER, guidItemCategory)) + { + WIAS_TRACE((g_hInst, "drvGetWiaFormatInfo called for the Patch Code Reader..", hr)); + } + else if (IsEqualGUID(WIA_CATEGORY_MICR_READER, guidItemCategory)) + { + WIAS_TRACE((g_hInst, "drvGetWiaFormatInfo called for the MICR Reader..", hr)); + } + else + { + if (IsEqualGUID(WIA_CATEGORY_ROOT, guidItemCategory)) + { + WIAS_TRACE((g_hInst, "drvGetWiaFormatInfo called for Root..", hr)); + } + else + { + WIAS_TRACE((g_hInst, "drvGetWiaFormatInfo called for an unknown item, assuming Root..", hr)); + } + guidItemCategory = WIA_CATEGORY_ROOT; + } + } + } + else + { + WIAS_TRACE((g_hInst, "drvGetWiaFormatInfo called for a NULL item context, assuming Root..", hr)); + guidItemCategory = WIA_CATEGORY_ROOT; + } + + // + // Check the number of available formats + // + if (SUCCEEDED(hr)) + { + // + // Note that the format info arrays are initialized on IStiUSD::Initialize + // so they may be available even before the Driver Item Tree is created: + // + if (IsEqualGUID(WIA_CATEGORY_FEEDER, guidItemCategory) || + IsEqualGUID(WIA_CATEGORY_FLATBED, guidItemCategory) || + IsEqualGUID(WIA_CATEGORY_AUTO, guidItemCategory) || + IsEqualGUID(WIA_CATEGORY_ROOT, guidItemCategory)) + { + lNumFormats = m_tFormatInfo.Size(); + pFormatInfo = (WIA_FORMAT_INFO *)m_tFormatInfo.Array(); + } + else if (IsEqualGUID(WIA_CATEGORY_IMPRINTER, guidItemCategory) || + IsEqualGUID(WIA_CATEGORY_ENDORSER, guidItemCategory)) + { + lNumFormats = m_tFormatInfoImprinterEndorser.Size(); + pFormatInfo = (WIA_FORMAT_INFO *)m_tFormatInfoImprinterEndorser.Array(); + } + else if (IsEqualGUID(WIA_CATEGORY_BARCODE_READER, guidItemCategory)) + { + lNumFormats = m_tFormatInfoBarcodeReader.Size(); + pFormatInfo = (WIA_FORMAT_INFO *)m_tFormatInfoBarcodeReader.Array(); + } + else if (IsEqualGUID(WIA_CATEGORY_PATCH_CODE_READER, guidItemCategory)) + { + lNumFormats = m_tFormatInfoPatchCodeReader.Size(); + pFormatInfo = (WIA_FORMAT_INFO *)m_tFormatInfoPatchCodeReader.Array(); + } + else if (IsEqualGUID(WIA_CATEGORY_MICR_READER, guidItemCategory)) + { + lNumFormats = m_tFormatInfoMicrReader.Size(); + pFormatInfo = (WIA_FORMAT_INFO *)m_tFormatInfoMicrReader.Array(); + } + + if ((!lNumFormats) || (!pFormatInfo)) + { + hr = E_FAIL; + WIAEX_ERROR((g_hInst, "Unexpected, the format array must be initialized first, hr = 0x%08X", hr)); + } + } + + // + // Return the requested list: + // + if (SUCCEEDED(hr)) + { + *pcelt = lNumFormats; + *ppwfi = pFormatInfo; + } + + if (FAILED(hr)) + { + m_hrLastEdviceError = hr; + } + + WIAEX_TRACE((g_hInst, "IWiaMiniDrv::drvGetWiaFormatInfo 0x%08X", hr)); + + return hr; +} + +/**************************************************************************\ +* +* Implements IWiaMiniDrv::drvNotifyPnpEvent. The WIA service notifies the +* driver of a supported PnP system event by calling this method. +* A real driver could respond to these events for example by releasing and +* redoing its connection with the Hardware device (and possibly signaling +* to a locally connected device that it can enter or resume power saving itself) +* when the computer goes into and exists stand-by and hibernation. +* +* The driver must check the pEventGUID parameter to determine what event +* is being processed. The events that are processed by the driver are: +* +* WIA_EVENT_POWER_SUSPEND - system is going to suspend/sleep mode +* WIA_EVENT_POWER_RESUME - system is waking up from suspend/sleep mode +* WIA_EVENT_DEVICE_DISCONNECTED - device is disconnected, driver will be unloaded +* WIA_EVENT_CANCEL_IO - pending IO is being cancelled +* +* The driver does not execute any special action on the following events: +* +* WIA_EVENT_DEVICE_CONNECTED (*)- driver initialization is being done on IStiUSD::Initialize +* +* (* - The driver logs a trace message following WIA_EVENT_DEVICE_CONNECTED +* and ensures the current device connection state is correctly recorded) +* +* Parameters: +* +* pEventGUI - GUID identifying the event +* bstrDeviceID - string containing the device's unique identifier +* ulReserved - reserved for system use +* +* Return Value: +* +* S_OK if succeeds, a standard COM error code otherwise +* +\**************************************************************************/ + +HRESULT CWiaDriver::drvNotifyPnpEvent( + _In_ const GUID* pEventGUID, + _In_ BSTR bstrDeviceID, + ULONG ulReserved) +{ + UNREFERENCED_PARAMETER(ulReserved); + + HRESULT hr = S_OK; + + WIAEX_TRACE_BEGIN; + + if (!pEventGUID) + { + hr = E_INVALIDARG; + WIAEX_ERROR((g_hInst, "Invalid parameter, hr = 0x%08X", hr)); + } + + if (SUCCEEDED(hr)) + { + if (bstrDeviceID) + { + WIAS_TRACE((g_hInst, "PnP event notification received for device ID %ws", bstrDeviceID)); + } + + if (WIA_EVENT_POWER_SUSPEND == *pEventGUID) + { + WIAS_TRACE((g_hInst, "WIA_EVENT_POWER_SUSPEND")); + + // + // Disable WIA events: + // + SetNotificationHandle(NULL); + } + else if (WIA_EVENT_POWER_RESUME == *pEventGUID) + { + WIAS_TRACE((g_hInst, "WIA_EVENT_POWER_RESUME")); + + if ((!m_hWiaEventStoredCopy) || (INVALID_HANDLE_VALUE == m_hWiaEventStoredCopy)) + { + hr = E_UNEXPECTED; + WIAEX_ERROR((g_hInst, "Failed to re-enable WIA events for WIA_EVENT_POWER_RESUME, invalid event handle, hr = 0x%08X", hr)); + } + + if (SUCCEEDED(hr)) + { + // + // Re-enable WIA events: + // + hr = SetNotificationHandle(m_hWiaEventStoredCopy); + if (FAILED(hr)) + { + WIAEX_ERROR((g_hInst, "Failed to re-enable WIA events on WIA_EVENT_POWER_RESUME, hr = 0x%08X", hr)); + } + } + } + else if (WIA_EVENT_DEVICE_CONNECTED == *pEventGUID) + { + WIAS_TRACE((g_hInst, "WIA_EVENT_DEVICE_CONNECTED")); + + // + // When the driver receives this event the driver is already loaded and initialized + // and a new driver object is already created. Ensure the correct connection state + // is recorded - note that this is not required as when the driver is reloaded + // SetDeviceConnected(TRUE) is already executed from within the CWiaDriver + // constructor when the new driver object instance is created. + // + } + else if (WIA_EVENT_DEVICE_DISCONNECTED == *pEventGUID) + { + WIAS_TRACE((g_hInst, "WIA_EVENT_DEVICE_DISCONNECTED")); + + // + // The driver is notified that the scanner device is disconnected and that the WIA + // service will soon unload the driver. The device communication interface will be + // uninitialized when the driver will be unloaded. The SetDeviceConnected(FALSE) call + // below will record the current state so when the device communication interface will + // be uninitialized (when the driver object will be released by the WIA service before + // unloading the driver) the driver won't log excessive errors to the WIA trace log + // when device operation requests will fail because the device won't be available): + // + + // + // Disable WIA events: + // + SetNotificationHandle(NULL); + } + else if (WIA_EVENT_CANCEL_IO == *pEventGUID) + { + WIAS_TRACE((g_hInst, "WIA_EVENT_CANCEL_IO")); + } + } + + if (FAILED(hr)) + { + m_hrLastEdviceError = hr; + } + + WIAEX_TRACE((g_hInst, "IWiaMiniDrv::drvNotifyPnpEvent 0x%08X", hr)); + + return hr; +} + +/**************************************************************************\ +* +* Implements IWiaMiniDrv::drvUnInitializeWia. The WIA service calls the +* IWiaMiniDrv::drvUnInitializeWia method when the resources associated +* with an application item tree are no longer needed. The driver must +* free all resources allocated for this application session. +* +* Parameters: +* +* pWiasContext - points to a device-specific context +* +* Return Value: +* +* S_OK if succeeds, a standard COM error code otherwise +* +\**************************************************************************/ + +HRESULT CWiaDriver::drvUnInitializeWia( + _Inout_ BYTE* pWiasContext) +{ + HRESULT hr = S_OK; + + WIAEX_TRACE_BEGIN; + + // + // Watch out to not prematurely fail this request... we must + // succeed freeing resources when this is called no matter what. + // + + if (InterlockedDecrement(&m_lClientsConnected) < 0) + { + WIAS_TRACE((g_hInst, + "drvUnInitializeWia, the client connection counter decremented below zero. Assuming no clients are currently connected and automatically setting to 0")); + m_lClientsConnected = 0; + } + + WIAS_TRACE((g_hInst, "drvUnInitializeWia, %d client(s) are currently connected to this driver", m_lClientsConnected)); + + if (!m_lClientsConnected) + { + // + // When the last client disconnects, destroy the WIA item tree. + // This should reduce the idle memory foot print of this driver: + // + DestroyDriverItemTree(); + } + + if (!pWiasContext) + { + WIAEX_ERROR((g_hInst, "drvUnInitializeWia called with NULL item context parameter (!!!); still, request completed, hr = 0x%08X", hr)); + } + + if (FAILED(hr)) + { + m_hrLastEdviceError = hr; + } + + WIAEX_TRACE((g_hInst, "IWiaMiniDrv::drvUnInitializeWia 0x%08X", hr)); + + return hr; +} + +/**************************************************************************\ +* +* Helper for CWiaDriver::drvDeviceCommand.Starts the scanner feeder. +* +* Parameters: +* +* None +* +* Return Value: +* +* S_OK if successful or an error HRESULT otherwise +* +\**************************************************************************/ + +HRESULT +CWiaDriver::StartFeeder() +{ + HRESULT hr = S_OK; + + if (!m_bFeederStarted) + { + // + // Start feeder + // + // ... + // + + m_bFeederStarted = TRUE; + WIAS_TRACE((g_hInst, "Feeder started")); + } + + return hr; +} + +/**************************************************************************\ +* +* Helper for CWiaDriver::drvDeviceCommand.Stops the scanner feeder. +* +* Parameters: +* +* None +* +* Return Value: +* +* S_OK if successful or an error HRESULT otherwise +* +\**************************************************************************/ + +HRESULT +CWiaDriver::StopFeeder() +{ + HRESULT hr = S_OK; + + if (m_bFeederStarted) + { + // + // Stop feeder + // + // ... + // + + m_bFeederStarted = FALSE; + WIAS_TRACE((g_hInst, "Feeder stopped")); + } + + return hr; +} |