1036 lines
24 KiB
C++
1036 lines
24 KiB
C++
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/*****************************************************************************
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*
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* (C) COPYRIGHT MICROSOFT CORPORATION, 2000
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*
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* TITLE: WiaProc.cpp
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*
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* VERSION: 1.0
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*
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* DATE: 2000/11/14
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*
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* DESCRIPTION: Manages Wia side of things
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*
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*****************************************************************************/
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#include <stdafx.h>
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#include <mmsystem.h>
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#include "wiavideotest.h"
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static struct
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{
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DWORD dwWiaDevMgrCookie;
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DWORD dwSelectedDeviceCookie;
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IUnknown *pCreateCallback;
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IUnknown *pDeleteCallback;
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IUnknown *pDisconnectedCallback;
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IUnknown *pConnectedCallback;
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IGlobalInterfaceTable *pGIT;
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CRITICAL_SECTION CritSec;
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} LOCAL_GVAR =
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{
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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0,
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FALSE,
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NULL
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};
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/****************************Local Function Prototypes********************/
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HRESULT ClearDeviceList();
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HRESULT AddItemToList(IWiaPropertyStorage *pItem,
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TCHAR *pszFriendlyName,
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TCHAR *pszDeviceID);
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WPARAM GetNumDevicesInList();
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IWiaPropertyStorage* GetWiaStorage(WPARAM uiIndex);
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HRESULT CreateWiaDevMgr(IWiaDevMgr **ppDevMgr);
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HRESULT GetProperty(IWiaPropertyStorage *pPropStorage,
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PROPID nPropID,
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LONG *pnValue);
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HRESULT GetProperty(IWiaPropertyStorage *pPropStorage,
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PROPID nPropID,
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TCHAR *pszBuffer,
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UINT cbBuffer);
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HRESULT SetProperty(IWiaPropertyStorage *pPropStorage,
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PROPID nPropID,
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const PROPVARIANT *ppv,
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PROPID nNameFirst);
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HRESULT AppUtil_ConvertToWideString(const TCHAR *pszStringToConvert,
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WCHAR *pwszString,
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UINT cchString);
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HRESULT AppUtil_ConvertToTCHAR(const WCHAR *pwszStringToConvert,
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TCHAR *pszString,
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UINT cchString);
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HRESULT CreateRootItem(IWiaDevMgr *pDevMgr,
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const TCHAR *pszWiaDeviceID,
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IWiaItem **ppRootItem);
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HRESULT RegisterForEvents(IWiaDevMgr *pDevMgr);
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///////////////////////////////
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// WiaProc_Init
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//
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HRESULT WiaProc_Init()
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{
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HRESULT hr = S_OK;
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IWiaDevMgr *pWiaDevMgr = NULL;
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if (LOCAL_GVAR.dwWiaDevMgrCookie != 0)
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{
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return S_OK;
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}
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__try
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{
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if (!InitializeCriticalSectionAndSpinCount(&LOCAL_GVAR.CritSec, MINLONG))
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{
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hr = HRESULT_FROM_WIN32(::GetLastError());
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}
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}
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__except(EXCEPTION_EXECUTE_HANDLER)
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{
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hr = E_OUTOFMEMORY;
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}
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if (hr == S_OK)
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{
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hr = CreateWiaDevMgr(&pWiaDevMgr);
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}
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if (hr == S_OK)
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{
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hr = CoCreateInstance(CLSID_StdGlobalInterfaceTable,
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NULL,
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CLSCTX_INPROC_SERVER,
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IID_IGlobalInterfaceTable,
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(void **)&LOCAL_GVAR.pGIT);
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}
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if (hr == S_OK)
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{
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LOCAL_GVAR.pGIT->RegisterInterfaceInGlobal(pWiaDevMgr,
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IID_IWiaDevMgr,
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&LOCAL_GVAR.dwWiaDevMgrCookie);
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}
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if (hr == S_OK)
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{
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hr = RegisterForEvents(pWiaDevMgr);
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}
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if (hr == S_OK)
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{
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WiaProc_PopulateDeviceList();
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}
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if (pWiaDevMgr)
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{
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pWiaDevMgr->Release();
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pWiaDevMgr = NULL;
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}
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return hr;
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}
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///////////////////////////////
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// WiaProc_Term
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//
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HRESULT WiaProc_Term()
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{
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HRESULT hr = S_OK;
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ClearDeviceList();
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if (LOCAL_GVAR.dwSelectedDeviceCookie != 0)
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{
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LOCAL_GVAR.pGIT->RevokeInterfaceFromGlobal(LOCAL_GVAR.dwSelectedDeviceCookie);
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LOCAL_GVAR.dwSelectedDeviceCookie = 0;
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}
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if (LOCAL_GVAR.dwWiaDevMgrCookie != 0)
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{
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LOCAL_GVAR.pGIT->RevokeInterfaceFromGlobal(LOCAL_GVAR.dwWiaDevMgrCookie);
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LOCAL_GVAR.dwWiaDevMgrCookie = 0;
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DeleteCriticalSection(&LOCAL_GVAR.CritSec);
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}
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if (LOCAL_GVAR.pCreateCallback)
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{
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LOCAL_GVAR.pCreateCallback->Release();
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LOCAL_GVAR.pCreateCallback = NULL;
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}
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if (LOCAL_GVAR.pDeleteCallback)
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{
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LOCAL_GVAR.pDeleteCallback->Release();
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LOCAL_GVAR.pDeleteCallback = NULL;
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}
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if (LOCAL_GVAR.pConnectedCallback)
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{
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LOCAL_GVAR.pConnectedCallback->Release();
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LOCAL_GVAR.pConnectedCallback = NULL;
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}
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if (LOCAL_GVAR.pDisconnectedCallback)
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{
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LOCAL_GVAR.pDisconnectedCallback->Release();
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LOCAL_GVAR.pDisconnectedCallback = NULL;
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}
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if (LOCAL_GVAR.pGIT)
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{
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LOCAL_GVAR.pGIT->Release();
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LOCAL_GVAR.pGIT = NULL;
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}
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return hr;
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}
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///////////////////////////////
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// WiaProc_CreateSelectedDevice
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//
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HRESULT WiaProc_CreateSelectedDevice(TCHAR *pszDeviceID,
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UINT cchDeviceID)
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{
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HRESULT hr = S_OK;
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WPARAM Index = 0;
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TCHAR szDeviceID[MAX_PATH] = {0};
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IWiaDevMgr *pWiaDevMgr = NULL;
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if ((LOCAL_GVAR.dwWiaDevMgrCookie == 0) ||
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(LOCAL_GVAR.pGIT == NULL))
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{
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return E_POINTER;
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}
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hr = LOCAL_GVAR.pGIT->GetInterfaceFromGlobal(LOCAL_GVAR.dwWiaDevMgrCookie,
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IID_IWiaDevMgr,
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(void**)&pWiaDevMgr);
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if (pWiaDevMgr == NULL)
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{
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return E_POINTER;
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}
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LRESULT lResult = 0;
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lResult = SendDlgItemMessage(APP_GVAR.hwndMainDlg,
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IDC_LIST_WIA_DEVICES,
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LB_GETCURSEL,
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0,
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0);
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Index = (WPARAM) lResult;
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if (Index == LB_ERR)
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{
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hr = E_FAIL;
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}
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if (hr == S_OK)
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{
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IWiaItem *pSelectedDevice = NULL;
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LPARAM lParam = 0;
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lParam = SendDlgItemMessage(APP_GVAR.hwndMainDlg,
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IDC_LIST_WIA_DEVICES,
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LB_GETITEMDATA,
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Index,
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0);
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IWiaPropertyStorage *pItem = (IWiaPropertyStorage*)lParam;
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if (pItem)
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{
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hr = GetProperty(pItem, WIA_DIP_DEV_ID, szDeviceID,
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sizeof(szDeviceID)/sizeof(TCHAR));
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if (hr == S_OK)
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{
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hr = CreateRootItem(pWiaDevMgr,
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szDeviceID,
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&pSelectedDevice);
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}
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if (hr == S_OK)
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{
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hr = LOCAL_GVAR.pGIT->RegisterInterfaceInGlobal(pSelectedDevice,
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IID_IWiaItem,
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&LOCAL_GVAR.dwSelectedDeviceCookie);
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}
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if (pszDeviceID)
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{
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_tcsncpy(pszDeviceID, szDeviceID, cchDeviceID);
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}
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if (pSelectedDevice)
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{
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pSelectedDevice->Release();
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pSelectedDevice = NULL;
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}
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}
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}
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if (pWiaDevMgr)
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{
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pWiaDevMgr->Release();
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pWiaDevMgr = NULL;
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}
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return hr;
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}
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///////////////////////////////
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// WiaProc_GetImageDirectory
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//
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HRESULT WiaProc_GetImageDirectory(TCHAR *pszImageDirectory,
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UINT cchImageDirectory)
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{
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HRESULT hr = S_OK;
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IWiaPropertyStorage *pStorage = NULL;
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IWiaItem *pSelectedDevice = NULL;
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if ((LOCAL_GVAR.dwSelectedDeviceCookie == 0) ||
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(LOCAL_GVAR.pGIT == NULL) ||
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(pszImageDirectory == NULL))
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{
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return E_POINTER;
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}
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if (hr == S_OK)
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{
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hr = LOCAL_GVAR.pGIT->GetInterfaceFromGlobal(LOCAL_GVAR.dwSelectedDeviceCookie,
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IID_IWiaItem,
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(void**)&pSelectedDevice);
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}
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if (pSelectedDevice == NULL)
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{
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hr = E_POINTER;
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}
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if (hr == S_OK)
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{
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hr = pSelectedDevice->QueryInterface(IID_IWiaPropertyStorage,
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(void**) &pStorage);
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}
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if (hr == S_OK)
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{
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hr = GetProperty(pStorage, WIA_DPV_IMAGES_DIRECTORY, pszImageDirectory,
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cchImageDirectory);
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}
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if (pStorage)
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{
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pStorage->Release();
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pStorage = NULL;
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}
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if (pSelectedDevice)
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{
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pSelectedDevice->Release();
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pSelectedDevice = NULL;
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}
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return hr;
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}
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///////////////////////////////
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// WiaProc_DeviceTakePicture
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//
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HRESULT WiaProc_DeviceTakePicture()
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{
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HRESULT hr = S_OK;
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IWiaItem *pSelectedDevice = NULL;
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if ((LOCAL_GVAR.dwSelectedDeviceCookie == 0) ||
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(LOCAL_GVAR.pGIT == NULL))
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{
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return E_POINTER;
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}
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if (hr == S_OK)
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{
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hr = LOCAL_GVAR.pGIT->GetInterfaceFromGlobal(LOCAL_GVAR.dwSelectedDeviceCookie,
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IID_IWiaItem,
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(void**)&pSelectedDevice);
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}
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if (pSelectedDevice == NULL)
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{
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hr = E_POINTER;
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}
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if (hr == S_OK)
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{
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IWiaItem *pUnused = NULL;
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hr = pSelectedDevice->DeviceCommand(0,
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&WIA_CMD_TAKE_PICTURE,
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&pUnused);
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if (pUnused)
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{
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pUnused->Release();
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pUnused = NULL;
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}
|
||
|
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}
|
||
|
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|
||
|
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if (pSelectedDevice)
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||
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{
|
||
|
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pSelectedDevice->Release();
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pSelectedDevice = NULL;
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||
|
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}
|
||
|
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||
|
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return hr;
|
||
|
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}
|
||
|
|
|
||
|
|
|
||
|
|
///////////////////////////////
|
||
|
|
// ClearDeviceList
|
||
|
|
//
|
||
|
|
HRESULT ClearDeviceList()
|
||
|
|
{
|
||
|
|
HRESULT hr = S_OK;
|
||
|
|
WPARAM NumDevices = 0;
|
||
|
|
|
||
|
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NumDevices = GetNumDevicesInList();
|
||
|
|
|
||
|
|
//
|
||
|
|
// Free all the IWiaItem pointers we saved in our
|
||
|
|
// list box.
|
||
|
|
//
|
||
|
|
if (NumDevices != LB_ERR)
|
||
|
|
{
|
||
|
|
for (WPARAM i = 0; i < NumDevices; i++)
|
||
|
|
{
|
||
|
|
IWiaPropertyStorage *pItem = NULL;
|
||
|
|
|
||
|
|
pItem = GetWiaStorage(i);
|
||
|
|
|
||
|
|
if (pItem)
|
||
|
|
{
|
||
|
|
pItem->Release();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
//
|
||
|
|
// Empty the list
|
||
|
|
//
|
||
|
|
SendDlgItemMessage(APP_GVAR.hwndMainDlg,
|
||
|
|
IDC_LIST_WIA_DEVICES,
|
||
|
|
LB_RESETCONTENT,
|
||
|
|
0,
|
||
|
|
0);
|
||
|
|
|
||
|
|
return hr;
|
||
|
|
}
|
||
|
|
|
||
|
|
///////////////////////////////
|
||
|
|
// WiaProc_PopulateDeviceList
|
||
|
|
//
|
||
|
|
HRESULT WiaProc_PopulateDeviceList()
|
||
|
|
{
|
||
|
|
HRESULT hr = S_OK;
|
||
|
|
IEnumWIA_DEV_INFO *pEnum = NULL;
|
||
|
|
IWiaDevMgr *pWiaDevMgr = NULL;
|
||
|
|
|
||
|
|
hr = LOCAL_GVAR.pGIT->GetInterfaceFromGlobal(LOCAL_GVAR.dwWiaDevMgrCookie,
|
||
|
|
IID_IWiaDevMgr,
|
||
|
|
(void**)&pWiaDevMgr);
|
||
|
|
|
||
|
|
if (pWiaDevMgr == NULL)
|
||
|
|
{
|
||
|
|
return E_POINTER;
|
||
|
|
}
|
||
|
|
|
||
|
|
//
|
||
|
|
// Clear out the device list if it has any items in it.
|
||
|
|
//
|
||
|
|
ClearDeviceList();
|
||
|
|
|
||
|
|
if (hr == S_OK)
|
||
|
|
{
|
||
|
|
hr = pWiaDevMgr->EnumDeviceInfo(0, &pEnum);
|
||
|
|
}
|
||
|
|
|
||
|
|
while (hr == S_OK)
|
||
|
|
{
|
||
|
|
IWiaItem *pRootItem = NULL;
|
||
|
|
IWiaPropertyStorage *pPropStorage = NULL;
|
||
|
|
TCHAR szFriendlyName[MAX_PATH + 1] = {0};
|
||
|
|
TCHAR szWiaDeviceID[MAX_PATH + 1] = {0};
|
||
|
|
|
||
|
|
//
|
||
|
|
// Get the next device in the enumeration.
|
||
|
|
//
|
||
|
|
hr = pEnum->Next(1, &pPropStorage, NULL);
|
||
|
|
|
||
|
|
//
|
||
|
|
// Get the device's Wia Device ID
|
||
|
|
//
|
||
|
|
if (hr == S_OK)
|
||
|
|
{
|
||
|
|
hr = GetProperty(pPropStorage, WIA_DIP_DEV_ID, szWiaDeviceID,
|
||
|
|
sizeof(szWiaDeviceID)/sizeof(TCHAR));
|
||
|
|
}
|
||
|
|
|
||
|
|
//
|
||
|
|
// Get the device's Wia Device Name
|
||
|
|
//
|
||
|
|
if (hr == S_OK)
|
||
|
|
{
|
||
|
|
hr = GetProperty(pPropStorage, WIA_DIP_DEV_NAME, szFriendlyName,
|
||
|
|
sizeof(szFriendlyName)/sizeof(TCHAR));
|
||
|
|
}
|
||
|
|
|
||
|
|
//
|
||
|
|
// We do not relesae the propstorage item because we store the pointer
|
||
|
|
// in our list until we shutdown the app.
|
||
|
|
//
|
||
|
|
|
||
|
|
if (hr == S_OK)
|
||
|
|
{
|
||
|
|
AddItemToList(pPropStorage, szFriendlyName, szWiaDeviceID);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
SendDlgItemMessage(APP_GVAR.hwndMainDlg,
|
||
|
|
IDC_LIST_WIA_DEVICES,
|
||
|
|
LB_SETCURSEL,
|
||
|
|
0,
|
||
|
|
0);
|
||
|
|
|
||
|
|
return hr;
|
||
|
|
}
|
||
|
|
|
||
|
|
///////////////////////////////
|
||
|
|
// RegisterForEvents
|
||
|
|
//
|
||
|
|
HRESULT RegisterForEvents(IWiaDevMgr *pWiaDevMgr)
|
||
|
|
{
|
||
|
|
HRESULT hr = S_OK;
|
||
|
|
CWiaEvent *pWiaEvent = NULL;
|
||
|
|
IWiaEventCallback *pIWiaEvent = NULL;
|
||
|
|
|
||
|
|
if (pWiaDevMgr == NULL)
|
||
|
|
{
|
||
|
|
return E_POINTER;
|
||
|
|
}
|
||
|
|
|
||
|
|
//
|
||
|
|
// Register our callback events
|
||
|
|
//
|
||
|
|
if (hr == S_OK)
|
||
|
|
{
|
||
|
|
// create the WiaEvent
|
||
|
|
pWiaEvent = new CWiaEvent();
|
||
|
|
|
||
|
|
if (pWiaEvent == NULL)
|
||
|
|
{
|
||
|
|
hr = E_OUTOFMEMORY;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (hr == S_OK)
|
||
|
|
{
|
||
|
|
hr = pWiaEvent->QueryInterface(IID_IWiaEventCallback,
|
||
|
|
(void**)&pIWiaEvent);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (hr == S_OK)
|
||
|
|
{
|
||
|
|
hr = pWiaDevMgr->RegisterEventCallbackInterface(WIA_REGISTER_EVENT_CALLBACK,
|
||
|
|
NULL,
|
||
|
|
&WIA_EVENT_DEVICE_CONNECTED,
|
||
|
|
pIWiaEvent,
|
||
|
|
&LOCAL_GVAR.pConnectedCallback);
|
||
|
|
|
||
|
|
hr = pWiaDevMgr->RegisterEventCallbackInterface(WIA_REGISTER_EVENT_CALLBACK,
|
||
|
|
NULL,
|
||
|
|
&WIA_EVENT_DEVICE_DISCONNECTED,
|
||
|
|
pIWiaEvent,
|
||
|
|
&LOCAL_GVAR.pDisconnectedCallback);
|
||
|
|
|
||
|
|
hr = pWiaDevMgr->RegisterEventCallbackInterface(WIA_REGISTER_EVENT_CALLBACK,
|
||
|
|
NULL,
|
||
|
|
&WIA_EVENT_ITEM_CREATED,
|
||
|
|
pIWiaEvent,
|
||
|
|
&LOCAL_GVAR.pCreateCallback);
|
||
|
|
|
||
|
|
hr = pWiaDevMgr->RegisterEventCallbackInterface(WIA_REGISTER_EVENT_CALLBACK,
|
||
|
|
NULL,
|
||
|
|
&WIA_EVENT_ITEM_DELETED,
|
||
|
|
pIWiaEvent,
|
||
|
|
&LOCAL_GVAR.pDeleteCallback);
|
||
|
|
}
|
||
|
|
|
||
|
|
//
|
||
|
|
// We don't need to delete pWiaEvent since we are releasing it.
|
||
|
|
//
|
||
|
|
if (pIWiaEvent)
|
||
|
|
{
|
||
|
|
pIWiaEvent->Release();
|
||
|
|
pIWiaEvent = NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
return hr;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
///////////////////////////////
|
||
|
|
// AddItemToList
|
||
|
|
//
|
||
|
|
HRESULT AddItemToList(IWiaPropertyStorage *pItem,
|
||
|
|
TCHAR *pszFriendlyName,
|
||
|
|
TCHAR *pszDeviceID)
|
||
|
|
{
|
||
|
|
HRESULT hr = S_OK;
|
||
|
|
WPARAM Index = 0;
|
||
|
|
|
||
|
|
if ((pItem == NULL) ||
|
||
|
|
(pszFriendlyName == NULL) ||
|
||
|
|
(pszDeviceID == NULL))
|
||
|
|
{
|
||
|
|
hr = E_POINTER;
|
||
|
|
return hr;
|
||
|
|
}
|
||
|
|
|
||
|
|
TCHAR szNewItem[MAX_PATH * 2] = {0};
|
||
|
|
|
||
|
|
_sntprintf(szNewItem, sizeof(szNewItem)/sizeof(TCHAR),
|
||
|
|
TEXT("%s (%s)"), pszFriendlyName, pszDeviceID);
|
||
|
|
|
||
|
|
LRESULT lResult = 0;
|
||
|
|
|
||
|
|
lResult = SendDlgItemMessage(APP_GVAR.hwndMainDlg,
|
||
|
|
IDC_LIST_WIA_DEVICES,
|
||
|
|
LB_ADDSTRING,
|
||
|
|
0,
|
||
|
|
(LPARAM) szNewItem);
|
||
|
|
|
||
|
|
Index = (WPARAM) lResult;
|
||
|
|
|
||
|
|
//
|
||
|
|
// pItem already has an AddRef on it.
|
||
|
|
//
|
||
|
|
SendDlgItemMessage(APP_GVAR.hwndMainDlg,
|
||
|
|
IDC_LIST_WIA_DEVICES,
|
||
|
|
LB_SETITEMDATA,
|
||
|
|
Index,
|
||
|
|
(LPARAM) pItem);
|
||
|
|
|
||
|
|
return hr;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
///////////////////////////////
|
||
|
|
// GetNumDevicesInList
|
||
|
|
//
|
||
|
|
WPARAM GetNumDevicesInList()
|
||
|
|
{
|
||
|
|
LRESULT lResult = 0;
|
||
|
|
WPARAM NumItems = 0;
|
||
|
|
|
||
|
|
lResult = SendDlgItemMessage(APP_GVAR.hwndMainDlg,
|
||
|
|
IDC_LIST_WIA_DEVICES,
|
||
|
|
LB_GETCOUNT,
|
||
|
|
0,
|
||
|
|
0);
|
||
|
|
|
||
|
|
NumItems = (WPARAM) lResult;
|
||
|
|
|
||
|
|
return NumItems;
|
||
|
|
}
|
||
|
|
|
||
|
|
///////////////////////////////
|
||
|
|
// GetWiaStorage
|
||
|
|
//
|
||
|
|
IWiaPropertyStorage* GetWiaStorage(WPARAM Index)
|
||
|
|
{
|
||
|
|
LPARAM lParam = 0;
|
||
|
|
IWiaPropertyStorage *pItem = NULL;
|
||
|
|
|
||
|
|
lParam = SendDlgItemMessage(APP_GVAR.hwndMainDlg,
|
||
|
|
IDC_LIST_WIA_DEVICES,
|
||
|
|
LB_GETITEMDATA,
|
||
|
|
Index,
|
||
|
|
0);
|
||
|
|
|
||
|
|
pItem = (IWiaPropertyStorage*)lParam;
|
||
|
|
|
||
|
|
return pItem;
|
||
|
|
}
|
||
|
|
|
||
|
|
///////////////////////////////
|
||
|
|
// CreateWiaDevMgr
|
||
|
|
//
|
||
|
|
HRESULT CreateWiaDevMgr(IWiaDevMgr **ppDevMgr)
|
||
|
|
{
|
||
|
|
HRESULT hr = S_OK;
|
||
|
|
|
||
|
|
if (ppDevMgr == NULL)
|
||
|
|
{
|
||
|
|
hr = E_POINTER;
|
||
|
|
|
||
|
|
return hr;
|
||
|
|
}
|
||
|
|
|
||
|
|
hr = CoCreateInstance(CLSID_WiaDevMgr,
|
||
|
|
NULL,
|
||
|
|
CLSCTX_LOCAL_SERVER,
|
||
|
|
IID_IWiaDevMgr,
|
||
|
|
(void**) ppDevMgr);
|
||
|
|
|
||
|
|
return hr;
|
||
|
|
}
|
||
|
|
|
||
|
|
///////////////////////////////
|
||
|
|
// WiaProc_GetProperty
|
||
|
|
//
|
||
|
|
// Generic
|
||
|
|
//
|
||
|
|
HRESULT WiaProc_GetProperty(IWiaPropertyStorage *pPropStorage,
|
||
|
|
PROPID nPropID,
|
||
|
|
PROPVARIANT *pPropVar)
|
||
|
|
{
|
||
|
|
HRESULT hr = S_OK;
|
||
|
|
|
||
|
|
if ((pPropStorage == NULL) ||
|
||
|
|
(pPropVar == NULL))
|
||
|
|
{
|
||
|
|
hr = E_POINTER;
|
||
|
|
return hr;
|
||
|
|
}
|
||
|
|
|
||
|
|
PropVariantInit(pPropVar);
|
||
|
|
|
||
|
|
PROPSPEC ps = {0};
|
||
|
|
|
||
|
|
ps.ulKind = PRSPEC_PROPID;
|
||
|
|
ps.propid = nPropID;
|
||
|
|
|
||
|
|
if (SUCCEEDED(hr))
|
||
|
|
{
|
||
|
|
hr = pPropStorage->ReadMultiple(1, &ps, pPropVar);
|
||
|
|
}
|
||
|
|
|
||
|
|
return hr;
|
||
|
|
}
|
||
|
|
|
||
|
|
///////////////////////////////
|
||
|
|
// GetProperty
|
||
|
|
//
|
||
|
|
// For 'long' properties
|
||
|
|
//
|
||
|
|
HRESULT GetProperty(IWiaPropertyStorage *pPropStorage,
|
||
|
|
PROPID nPropID,
|
||
|
|
LONG *pnValue)
|
||
|
|
{
|
||
|
|
HRESULT hr = S_OK;
|
||
|
|
|
||
|
|
if ((pPropStorage == NULL) ||
|
||
|
|
(pnValue == NULL))
|
||
|
|
{
|
||
|
|
hr = E_POINTER;
|
||
|
|
return hr;
|
||
|
|
}
|
||
|
|
|
||
|
|
PROPVARIANT pvPropValue;
|
||
|
|
|
||
|
|
*pnValue = 0;
|
||
|
|
|
||
|
|
PropVariantInit(&pvPropValue);
|
||
|
|
|
||
|
|
hr = WiaProc_GetProperty(pPropStorage, nPropID, &pvPropValue);
|
||
|
|
|
||
|
|
if (hr == S_OK)
|
||
|
|
{
|
||
|
|
if ((pvPropValue.vt == VT_I4) ||
|
||
|
|
(pvPropValue.vt == VT_UI4))
|
||
|
|
{
|
||
|
|
*pnValue = pvPropValue.lVal;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
PropVariantClear(&pvPropValue);
|
||
|
|
|
||
|
|
return hr;
|
||
|
|
}
|
||
|
|
|
||
|
|
///////////////////////////////
|
||
|
|
// GetProperty
|
||
|
|
//
|
||
|
|
// For 'string' properties
|
||
|
|
//
|
||
|
|
HRESULT GetProperty(IWiaPropertyStorage *pPropStorage,
|
||
|
|
PROPID nPropID,
|
||
|
|
TCHAR *pszBuffer,
|
||
|
|
UINT cbBuffer)
|
||
|
|
{
|
||
|
|
HRESULT hr = S_OK;
|
||
|
|
|
||
|
|
if ((pPropStorage == NULL) ||
|
||
|
|
(pszBuffer == NULL))
|
||
|
|
{
|
||
|
|
hr = E_POINTER;
|
||
|
|
return hr;
|
||
|
|
}
|
||
|
|
|
||
|
|
PROPVARIANT pvPropValue;
|
||
|
|
|
||
|
|
PropVariantInit(&pvPropValue);
|
||
|
|
|
||
|
|
hr = WiaProc_GetProperty(pPropStorage, nPropID, &pvPropValue);
|
||
|
|
|
||
|
|
if (hr == S_OK)
|
||
|
|
{
|
||
|
|
if ((pvPropValue.vt == VT_LPWSTR) ||
|
||
|
|
(pvPropValue.vt == VT_BSTR))
|
||
|
|
{
|
||
|
|
AppUtil_ConvertToTCHAR(pvPropValue.pwszVal, pszBuffer, cbBuffer);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
//
|
||
|
|
// This frees the BSTR
|
||
|
|
//
|
||
|
|
PropVariantClear(&pvPropValue);
|
||
|
|
|
||
|
|
return hr;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
///////////////////////////////
|
||
|
|
// CreateRootItem
|
||
|
|
//
|
||
|
|
HRESULT CreateRootItem(IWiaDevMgr *pDevMgr,
|
||
|
|
const TCHAR *pszWiaDeviceID,
|
||
|
|
IWiaItem **ppRootItem)
|
||
|
|
{
|
||
|
|
HRESULT hr = S_OK;
|
||
|
|
|
||
|
|
if ((pDevMgr == NULL) ||
|
||
|
|
(pszWiaDeviceID == NULL) ||
|
||
|
|
(ppRootItem == NULL))
|
||
|
|
{
|
||
|
|
hr = E_POINTER;
|
||
|
|
|
||
|
|
return hr;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (hr == S_OK)
|
||
|
|
{
|
||
|
|
BOOL bRetry = TRUE;
|
||
|
|
|
||
|
|
BSTR bstrDeviceID = NULL;
|
||
|
|
WCHAR wszWiaDeviceID[MAX_PATH] = {0};
|
||
|
|
|
||
|
|
AppUtil_ConvertToWideString(pszWiaDeviceID, wszWiaDeviceID,
|
||
|
|
sizeof(wszWiaDeviceID) / sizeof(WCHAR));
|
||
|
|
|
||
|
|
bstrDeviceID = SysAllocString(wszWiaDeviceID);
|
||
|
|
|
||
|
|
for (UINT uiRetryCount = 0;
|
||
|
|
(uiRetryCount < 5) && (bRetry);
|
||
|
|
++uiRetryCount)
|
||
|
|
{
|
||
|
|
|
||
|
|
hr = pDevMgr->CreateDevice(bstrDeviceID,
|
||
|
|
ppRootItem);
|
||
|
|
|
||
|
|
if (SUCCEEDED(hr))
|
||
|
|
{
|
||
|
|
//
|
||
|
|
// Break out of loop
|
||
|
|
//
|
||
|
|
bRetry = FALSE;
|
||
|
|
}
|
||
|
|
else if (hr == WIA_ERROR_BUSY)
|
||
|
|
{
|
||
|
|
//
|
||
|
|
// Wait a little while before retrying
|
||
|
|
//
|
||
|
|
Sleep(200);
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
//
|
||
|
|
// All other errors are considered fatal
|
||
|
|
//
|
||
|
|
bRetry = FALSE;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (bstrDeviceID)
|
||
|
|
{
|
||
|
|
SysFreeString(bstrDeviceID);
|
||
|
|
bstrDeviceID = NULL;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return hr;
|
||
|
|
}
|
||
|
|
|
||
|
|
///////////////////////////////
|
||
|
|
// SetProperty
|
||
|
|
//
|
||
|
|
// Generic
|
||
|
|
//
|
||
|
|
HRESULT SetProperty(IWiaPropertyStorage *pPropStorage,
|
||
|
|
PROPID nPropID,
|
||
|
|
const PROPVARIANT *ppv,
|
||
|
|
PROPID nNameFirst)
|
||
|
|
{
|
||
|
|
HRESULT hr = 0;
|
||
|
|
PROPSPEC ps = {0};
|
||
|
|
|
||
|
|
if ((pPropStorage == NULL) ||
|
||
|
|
(ppv == NULL))
|
||
|
|
{
|
||
|
|
return E_POINTER;
|
||
|
|
}
|
||
|
|
|
||
|
|
ps.ulKind = PRSPEC_PROPID;
|
||
|
|
ps.propid = nPropID;
|
||
|
|
|
||
|
|
if (hr == S_OK)
|
||
|
|
{
|
||
|
|
hr = pPropStorage->WriteMultiple(1, &ps, ppv, nNameFirst);
|
||
|
|
}
|
||
|
|
|
||
|
|
return hr;
|
||
|
|
}
|
||
|
|
|
||
|
|
///////////////////////////////
|
||
|
|
// WiaProc_SetLastSavedImage
|
||
|
|
//
|
||
|
|
// For 'string' properties
|
||
|
|
//
|
||
|
|
HRESULT WiaProc_SetLastSavedImage(BSTR bstrLastSavedImage)
|
||
|
|
{
|
||
|
|
HRESULT hr = S_OK;
|
||
|
|
IWiaItem *pSelectedDevice = NULL;
|
||
|
|
IWiaPropertyStorage *pStorage = NULL;
|
||
|
|
PROPVARIANT pv = {0};
|
||
|
|
|
||
|
|
if ((LOCAL_GVAR.dwSelectedDeviceCookie == 0) ||
|
||
|
|
(LOCAL_GVAR.pGIT == NULL))
|
||
|
|
{
|
||
|
|
return E_POINTER;
|
||
|
|
}
|
||
|
|
|
||
|
|
EnterCriticalSection(&LOCAL_GVAR.CritSec);
|
||
|
|
|
||
|
|
if (hr == S_OK)
|
||
|
|
{
|
||
|
|
hr = LOCAL_GVAR.pGIT->GetInterfaceFromGlobal(LOCAL_GVAR.dwSelectedDeviceCookie,
|
||
|
|
IID_IWiaItem,
|
||
|
|
(void**)&pSelectedDevice);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (pSelectedDevice == NULL)
|
||
|
|
{
|
||
|
|
hr = E_POINTER;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (hr == S_OK)
|
||
|
|
{
|
||
|
|
hr = pSelectedDevice->QueryInterface(IID_IWiaPropertyStorage,
|
||
|
|
(void**)&pStorage);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (hr == S_OK)
|
||
|
|
{
|
||
|
|
PropVariantInit(&pv);
|
||
|
|
|
||
|
|
pv.vt = VT_BSTR;
|
||
|
|
pv.bstrVal = bstrLastSavedImage;
|
||
|
|
|
||
|
|
hr = SetProperty(pStorage, WIA_DPV_LAST_PICTURE_TAKEN, &pv, 2);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (pStorage)
|
||
|
|
{
|
||
|
|
pStorage->Release();
|
||
|
|
pStorage = NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (pSelectedDevice)
|
||
|
|
{
|
||
|
|
pSelectedDevice->Release();
|
||
|
|
pSelectedDevice = NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
LeaveCriticalSection(&LOCAL_GVAR.CritSec);
|
||
|
|
|
||
|
|
return hr;
|
||
|
|
}
|
||
|
|
|
||
|
|
///////////////////////////////
|
||
|
|
// WiaProc_PopulateItemList
|
||
|
|
//
|
||
|
|
HRESULT WiaProc_PopulateItemList()
|
||
|
|
{
|
||
|
|
HRESULT hr = S_OK;
|
||
|
|
|
||
|
|
if (LOCAL_GVAR.dwSelectedDeviceCookie == 0)
|
||
|
|
{
|
||
|
|
return E_POINTER;
|
||
|
|
}
|
||
|
|
|
||
|
|
hr = ImageLst_PopulateWiaItemList(LOCAL_GVAR.pGIT,
|
||
|
|
LOCAL_GVAR.dwSelectedDeviceCookie);
|
||
|
|
|
||
|
|
return hr;
|
||
|
|
}
|
||
|
|
|
||
|
|
///////////////////////////////
|
||
|
|
// WiaProc_DestroySelectedDevice
|
||
|
|
//
|
||
|
|
HRESULT WiaProc_DestroySelectedDevice()
|
||
|
|
{
|
||
|
|
HRESULT hr = S_OK;
|
||
|
|
|
||
|
|
if (LOCAL_GVAR.dwSelectedDeviceCookie == 0)
|
||
|
|
{
|
||
|
|
return E_POINTER;
|
||
|
|
}
|
||
|
|
|
||
|
|
ImageLst_CancelLoadAndWait(5000);
|
||
|
|
|
||
|
|
if ((LOCAL_GVAR.dwSelectedDeviceCookie != 0) &&
|
||
|
|
(LOCAL_GVAR.pGIT != NULL))
|
||
|
|
{
|
||
|
|
LOCAL_GVAR.pGIT->RevokeInterfaceFromGlobal(LOCAL_GVAR.dwSelectedDeviceCookie);
|
||
|
|
LOCAL_GVAR.dwSelectedDeviceCookie = 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
ImageLst_Clear();
|
||
|
|
|
||
|
|
return hr;
|
||
|
|
}
|
||
|
|
|
||
|
|
|