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Windows-classic-samples/Samples/Win7Samples/tabletpc/recodll/cpp/RecoDll.cpp
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2025-11-28 00:35:46 +09:00

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// THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF
// ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO
// THE IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A
// PARTICULAR PURPOSE.
//
// Copyright (c) Microsoft Corporation. All rights reserved.
// This recognizer implementation illustrates essentials of
// loading a recognizer DLL, obtaining ink strokes
// to recognize, and returning a recognition result.
#include "stdafx.h"
#include <assert.h>
#include <Strsafe.h>
#include <Objbase.h>
#include "Limits.h"
#include "RecApis.h"
#include "tpcError.h"
#include "RecoDll.h"
static void DestroyLattice( RECO_LATTICE *pLattice );
static HRESULT GetRecoAttributesHelper(HINSTANCE hDllInstance, RECO_ATTRS* pRecoAttrs);
static const GUID s_guid_x = { 0x598a6a8f, 0x52c0, 0x4ba0, { 0x93, 0xaf, 0xaf, 0x35, 0x74, 0x11, 0xa5, 0x61 } };
static const GUID s_guid_y = { 0xb53f9f75, 0x04e0, 0x4498, { 0xa7, 0xee, 0xc3, 0x0d, 0xbb, 0x5a, 0x90, 0x11 } };
static const PROPERTY_METRICS s_DefaultPropMetrics = { LONG_MIN, LONG_MAX, PROPERTY_UNITS_CENTIMETERS, 1000.0 };
static LPCWSTR TPG_REGPATH = L"Software\\Microsoft\\TPG";
static LPCWSTR RECOGNIZER_REGPATH = L"Software\\Microsoft\\TPG\\Recognizers";
static LPCWSTR MY_RECO_REGKEY = L"Software\\Microsoft\\TPG\\Recognizers\\" MY_RECO_GUID;
static LPCWSTR RECO_DLL_REGVALNAME = L"Recognizer dll";
static LPCWSTR RECO_LANGUAGES_REGVALNAME = L"Recognized Languages";
static LPCWSTR RECO_CAPABILITIES_REGVALNAME = L"Recognizer Capability Flags";
static HINSTANCE s_hDllInstance = NULL;
struct MY_RECOGNIZER
{
// Store runtime data here that your algorithm uses for recognizing ink.
GUID RecoGuid;
};
#define MAX_RESULT_CHARS 200
#define MAX_STROKES_IN_CONTEXT 50000
#define MAX_POINTS_IN_STROKE 100000
struct MY_STROKE
{
MY_STROKE *pNext;
ULONG cPoints; // number of points in the stroke
__field_ecount_full(cPoints)
POINT *aPoints; // array of x-y points in the stroke
};
struct MY_RECOCONTEXT
{
MY_RECOGNIZER *pRecognizer; // recognizer to use on pStrokeList
RECO_GUIDE *pGuide; // reference boundaries for strokes
ULONG uiGuideIndex; // set but not used (obsolete)
ULONG cStrokes; // Number of ink strokes added
ULONG cPointsTot; // number of x-y points in all strokes
MY_STROKE *pStrokeList; // new strokes are inserted at head of list
WCHAR wzBestResult[MAX_RESULT_CHARS]; // reco result based on the stroke list
RECO_LATTICE *pLattice; // mapping of reco result to strokes
};
BOOL APIENTRY DllMain( HANDLE hModule,
DWORD ul_reason_for_call,
void* lpReserved
)
{
UNREFERENCED_PARAMETER(lpReserved);
switch (ul_reason_for_call)
{
case DLL_PROCESS_ATTACH:
s_hDllInstance = (HINSTANCE) hModule;
break;
case DLL_THREAD_ATTACH:
case DLL_THREAD_DETACH:
case DLL_PROCESS_DETACH:
break;
default:
return FALSE;
}
return TRUE;
}
/////////////////////////////////////////////////////////////////////////////
// DllRegisterServer - Adds entries to the system registry
/////////////////////////////////////////////////////////////////////////////
STDAPI DllRegisterServer(void)
{
LONG lRes = 0;
HKEY hkeyMyReco;
DWORD dwLength = 0;
DWORD dwDisposition;
WCHAR wzRecognizerPath[MAX_PATH];
HRESULT hr = S_OK;
RECO_ATTRS recoAttr;
// Write the path to this dll in the registry under
// the recognizer subkey
// Wipe out the previous values
RegDeleteKeyW(HKEY_LOCAL_MACHINE, MY_RECO_REGKEY);
// Create the new key
lRes = RegCreateKeyExW(HKEY_LOCAL_MACHINE, MY_RECO_REGKEY, 0, NULL,
REG_OPTION_NON_VOLATILE, KEY_WRITE, NULL, &hkeyMyReco, &dwDisposition);
assert(lRes == ERROR_SUCCESS && "Can't write registry");
if (lRes != ERROR_SUCCESS)
{
RegCloseKey(hkeyMyReco);
return E_UNEXPECTED;
}
// Get the Reco DLL's full pathname and write it to the registry
dwLength = GetModuleFileNameW((HMODULE)s_hDllInstance, wzRecognizerPath, MAX_PATH);
lRes = RegSetValueExW(hkeyMyReco, RECO_DLL_REGVALNAME, NULL, REG_SZ,
(BYTE*)wzRecognizerPath, sizeof(WCHAR)*dwLength);
assert(lRes == ERROR_SUCCESS && "Can't write registry");
if (lRes != ERROR_SUCCESS)
{
RegCloseKey(hkeyMyReco);
return E_UNEXPECTED;
}
// Get the Reco attributes from the DLL and write them to registry
hr = GetRecoAttributesHelper(s_hDllInstance, &recoAttr);
if (FAILED(hr))
{
RegCloseKey(hkeyMyReco);
return E_UNEXPECTED;
}
lRes = RegSetValueExW(hkeyMyReco, RECO_LANGUAGES_REGVALNAME, 0, REG_BINARY,
(BYTE*)recoAttr.awLanguageId, 64 * sizeof(WORD));
assert(lRes == ERROR_SUCCESS);
if (lRes != ERROR_SUCCESS)
{
RegCloseKey(hkeyMyReco);
return E_UNEXPECTED;
}
lRes = RegSetValueExW(hkeyMyReco, RECO_CAPABILITIES_REGVALNAME, 0, REG_DWORD,
(BYTE*)&(recoAttr.dwRecoCapabilityFlags), sizeof(DWORD));
assert(lRes == ERROR_SUCCESS);
if (lRes != ERROR_SUCCESS)
{
RegCloseKey(hkeyMyReco);
return E_UNEXPECTED;
}
RegCloseKey(hkeyMyReco);
return S_OK;
}
/////////////////////////////////////////////////////////////////////////////
// DllUnregisterServer - Removes entries from the system registry
STDAPI DllUnregisterServer(void)
{
LONG lRes1 = 0;
// Wipe out the registry information
lRes1 = RegDeleteKeyW(HKEY_LOCAL_MACHINE, MY_RECO_REGKEY);
// Delete our parent keys if they contain no remaining subkeys
// (don't care if these fail)
RegDeleteKeyW(HKEY_LOCAL_MACHINE, RECOGNIZER_REGPATH);
RegDeleteKeyW(HKEY_LOCAL_MACHINE, TPG_REGPATH);
if (lRes1 != ERROR_SUCCESS && lRes1 != ERROR_FILE_NOT_FOUND)
{
return E_UNEXPECTED;
}
return S_OK ;
}
static BOOL IsResourceMatchClsId(REFCLSID pCLSID, HINSTANCE hDll)
{
// Make sure this GUID matches the one the DLL was built with.
WCHAR awcRecoGUID[ARRAYSIZE(MY_RECO_GUID)];
LPOLESTR pszCLSID = NULL;
BOOL bRet = FALSE;
if (NULL == hDll)
{
return FALSE;
}
// convert the passed CLSID to a str
if (!SUCCEEDED(StringFromCLSID(pCLSID, &pszCLSID)))
{
goto exit;
}
// load the recognizer's GUID string from resources and compare it with the passed argument
if (!LoadStringW (hDll, RESID_MY_RECO_GUID, awcRecoGUID, ARRAYSIZE(awcRecoGUID)) )
{
goto exit;
}
if (0 == _wcsicmp (pszCLSID, awcRecoGUID))
{
// Clsid matches
bRet = TRUE;
}
exit:
if (NULL != pszCLSID)
{
CoTaskMemFree (pszCLSID);
}
return bRet;
}
////////////////////////
// IRecognizer
////////////////////////
HRESULT WINAPI CreateRecognizer(CLSID *pCLSID, HRECOGNIZER *phrec)
{
// Initialize a recognizer. Our example requires no special action here.
// A more elaborate example might require loading of data to assist
// with recognition.
if( !pCLSID )
{
return E_POINTER;
}
if( !s_hDllInstance )
{
return E_FAIL;
}
if( !IsResourceMatchClsId((REFCLSID)*pCLSID, s_hDllInstance) )
{
return E_FAIL;
}
MY_RECOGNIZER *pRec = new MY_RECOGNIZER;
if( !pRec )
{
return E_OUTOFMEMORY;
}
pRec->RecoGuid = *pCLSID;
*phrec = (HRECOGNIZER) pRec;
return S_OK;
}
HRESULT WINAPI DestroyRecognizer(HRECOGNIZER hrec)
{
if( !hrec )
{
return E_POINTER;
}
delete (MY_RECOGNIZER*) hrec;
return S_OK;
}
static HRESULT GetRecoAttributesHelper(HINSTANCE hDllInstance, RECO_ATTRS* pRecoAttrs)
{
HRSRC hrsrc = NULL;
HGLOBAL hg = NULL;
LPBYTE pv = NULL;
DWORD dwRecoCapabilityFlags;
WORD wLanguageCount;
WORD iLang;
if (!pRecoAttrs)
{
return E_POINTER;
}
if( !hDllInstance )
{
return E_POINTER;
}
// Initialize the Reco Attribute structure
ZeroMemory(pRecoAttrs, sizeof(RECO_ATTRS));
// Load the recognizer friendly name
if (0 == LoadStringW(s_hDllInstance, // handle to resource module
RESID_MY_FRIENDLYNAME, // resource identifier
pRecoAttrs->awcFriendlyName, // resource buffer
ARRAYSIZE(pRecoAttrs->awcFriendlyName) // size of buffer
))
{
return E_FAIL;
}
// Load the recognizer vendor name
if (0 == LoadStringW(s_hDllInstance, // handle to resource module
RESID_MY_VENDORNAME, // resource identifier
pRecoAttrs->awcVendorName, // resource buffer
ARRAYSIZE(pRecoAttrs->awcVendorName) // size of buffer
))
{
return E_FAIL;
}
// Load the resources
hrsrc = FindResource(s_hDllInstance, // module handle
MAKEINTRESOURCE(RESID_MY_RECO_INFO), // resource name
RT_RCDATA // resource type
);
if (NULL == hrsrc)
{
// The resource is not found!
return E_FAIL;
}
hg = LoadResource(
s_hDllInstance, // module handle
hrsrc // resource handle
);
if (NULL == hg)
{
return E_FAIL;
}
pv = (LPBYTE)LockResource(
hg // handle to resource
);
if (NULL == pv)
{
return E_FAIL;
}
dwRecoCapabilityFlags = *((DWORD*)pv);
pv += sizeof(dwRecoCapabilityFlags);
wLanguageCount = *((WORD*)pv);
pv += sizeof(wLanguageCount);
// Fill the reco attribute structure for this recognizer
// Add the languages
if( wLanguageCount > MAX_LANGUAGES-1 )
{
wLanguageCount = MAX_LANGUAGES-1;
}
for (iLang = 0; iLang < wLanguageCount; iLang++)
{
WORD iLanguage, iSubLang;
iLanguage = *((WORD *)pv);
pv += sizeof (iLang);
iSubLang = *((WORD *)pv);
pv += sizeof (iSubLang);
pRecoAttrs->awLanguageId[iLang] = MAKELANGID((USHORT)iLanguage, (USHORT)iSubLang);
}
// End the list with a NULL
pRecoAttrs->awLanguageId[wLanguageCount] = 0;
pRecoAttrs->dwRecoCapabilityFlags = dwRecoCapabilityFlags;
return S_OK;
}
HRESULT WINAPI GetRecoAttributes(HRECOGNIZER hrec, RECO_ATTRS* pRecoAttrs)
{
if (NULL == hrec)
{
return E_POINTER;
}
return GetRecoAttributesHelper( s_hDllInstance, pRecoAttrs);
}
HRESULT WINAPI CreateContext(HRECOGNIZER hrec, HRECOCONTEXT *phrc)
{
if( !hrec || !phrc )
{
return E_POINTER;
}
MY_RECOCONTEXT *pRC = new MY_RECOCONTEXT;
if( !pRC )
{
return E_OUTOFMEMORY;
}
ZeroMemory( pRC, sizeof(MY_RECOCONTEXT) );
pRC->pRecognizer = (MY_RECOGNIZER*) hrec;
*phrc = (HRECOCONTEXT) pRC;
return S_OK;
}
static void DestroyStrokeList( MY_STROKE *pStrokeList )
{
while( pStrokeList )
{
MY_STROKE *pStrokeToDelete = pStrokeList;
pStrokeList = pStrokeList->pNext;
if( pStrokeToDelete->aPoints )
{
delete [] pStrokeToDelete->aPoints;
}
delete pStrokeToDelete;
}
}
HRESULT WINAPI DestroyContext(HRECOCONTEXT hrc)
{
if( !hrc )
{
return E_POINTER;
}
MY_RECOCONTEXT *pRC = (MY_RECOCONTEXT *) hrc;
if( pRC->pGuide )
{
delete pRC->pGuide;
}
DestroyStrokeList( pRC->pStrokeList );
if( pRC->pLattice ) // The lattice contains dynamic data to free
{
DestroyLattice( pRC->pLattice );
}
ZeroMemory(pRC, sizeof(MY_RECOCONTEXT));
delete (MY_RECOCONTEXT *) hrc;
return S_OK;
}
HRESULT WINAPI GetResultPropertyList(HRECOGNIZER hrec, ULONG* pPropertyCount, GUID*pPropertyGuid)
{
UNREFERENCED_PARAMETER(hrec);
UNREFERENCED_PARAMETER(pPropertyCount);
UNREFERENCED_PARAMETER(pPropertyGuid);
return E_NOTIMPL;
}
HRESULT WINAPI GetPreferredPacketDescription(HRECOGNIZER hrec, PACKET_DESCRIPTION* pPacketDescription)
{
if ( !pPacketDescription )
{
return E_POINTER;
}
//
// We can be called with pPacketProperties
// equal to NULL, just to get the size of the buffers
if (pPacketDescription->pPacketProperties)
{
// Set the packet size to the size of x and y
pPacketDescription->cbPacketSize = 2 * sizeof(LONG);
// We are only setting 2 properties (X and Y)
if (pPacketDescription->cPacketProperties < 2)
{
return TPC_E_INSUFFICIENT_BUFFER;
}
pPacketDescription->cPacketProperties = 2;
// We are not setting buttons
pPacketDescription->cButtons = 0;
// Make sure that the pPacketProperties is of a valid size
if (!pPacketDescription->pPacketProperties )
{
return E_POINTER;
}
// Fill in pPacketProperties
// Add the GUID_X
pPacketDescription->pPacketProperties[0].guid = s_guid_x;
pPacketDescription->pPacketProperties[0].PropertyMetrics = s_DefaultPropMetrics;
// Add the GUID_Y
pPacketDescription->pPacketProperties[1].guid = s_guid_y;
pPacketDescription->pPacketProperties[1].PropertyMetrics = s_DefaultPropMetrics;
}
else
{
// Just fill in the PacketDescription structure leaving NULL
// pointers for the pguidButtons and pPacketProperies
// Set the packet size to the size of x and y
pPacketDescription->cbPacketSize = 2 * sizeof(LONG);
// We are only setting 2 properties (X and Y)
pPacketDescription->cPacketProperties = 2;
// We are not setting buttons
pPacketDescription->cButtons = 0;
// There are no guid buttons
pPacketDescription->pguidButtons = NULL;
}
return S_OK;
}
HRESULT WINAPI GetUnicodeRanges(HRECOGNIZER hrec, ULONG *pcRanges, CHARACTER_RANGE *pcr)
{
UNREFERENCED_PARAMETER(hrec);
UNREFERENCED_PARAMETER(pcRanges);
UNREFERENCED_PARAMETER(pcr);
return E_NOTIMPL;
}
////////////////////////
// IRecoContext
////////////////////////
static int RealToInt( double dVal )
{
return dVal<0.0 ? (int)(dVal-0.5) : (int)(dVal+0.5);
}
static void Transform(const XFORM *pXf, POINT * aPoints, ULONG cPoints)
{
// Transform POINT array in place
ULONG iPoint = 0;
LONG xp = 0;
if(NULL != pXf)
{
assert((cPoints == 0) || aPoints);
for(iPoint = 0; iPoint < cPoints; ++iPoint)
{
xp = RealToInt(aPoints[iPoint].x * pXf->eM11 + aPoints[iPoint].y * pXf->eM21 + pXf->eDx);
aPoints[iPoint].y = RealToInt(aPoints[iPoint].x * pXf->eM12 + aPoints[iPoint].y * pXf->eM22 + pXf->eDy);
aPoints[iPoint].x = xp;
}
}
}
HRESULT WINAPI AddStroke(HRECOCONTEXT hrc,
const PACKET_DESCRIPTION *pPacketDesc,
ULONG cbPacket, // I: Size of packet array (in BYTEs)
const BYTE *pPacket, // I: Array of packets
const XFORM *pXForm) // I: Transform to apply to each point
{
// Add a copy of the given stroke points to the reco context.
ULONG ulPacketSize; // Size of one packet (in LONGs)
ULONG cPoints; // number of points in the stroke
MY_RECOCONTEXT *pRC = (MY_RECOCONTEXT *) hrc;
if (NULL == pRC )
{
return E_POINTER;
}
if ( !pPacket || !cbPacket )
{
return E_POINTER;
}
if( MAX_STROKES_IN_CONTEXT <= pRC->cStrokes )
{
return E_FAIL;
}
//
// Get the number of packets (== number of points)
if (pPacketDesc)
{
if ( !pPacketDesc->cbPacketSize )
{
return TPC_E_INVALID_PACKET_DESCRIPTION;
}
if (pPacketDesc->cbPacketSize % sizeof(LONG) != 0)
{
return TPC_E_INVALID_PACKET_DESCRIPTION;
}
if (cbPacket % pPacketDesc->cbPacketSize != 0)
{
return TPC_E_INVALID_PACKET_DESCRIPTION;
}
ulPacketSize = pPacketDesc->cbPacketSize / sizeof(LONG);
cPoints = cbPacket / pPacketDesc->cbPacketSize;
if (ulPacketSize < 2) // Need 2+ values in a packet; i.e. X and Y
{
return TPC_E_INVALID_PACKET_DESCRIPTION;
}
}
else // Preferred packet description
{
if (cbPacket % (2 * sizeof(LONG)) != 0)
{
return TPC_E_INVALID_PACKET_DESCRIPTION;
}
ulPacketSize = 2;
cPoints = cbPacket / (2 * sizeof(LONG));
}
if (cPoints == 0) // Don't add strokes with 0 points
{
return E_FAIL;
}
if( MAX_POINTS_IN_STROKE < cPoints )
{
return E_FAIL;
}
//
// Find the index (offset) in packet of GUID_X and GUID_Y
ULONG ulXIndex, ulYIndex;
if (pPacketDesc)
{
if (pPacketDesc->cPacketProperties < 2 || // Need 2+ properties
NULL == pPacketDesc->pPacketProperties) // Corrupted structure
{
assert(0); // This should never happen!
return TPC_E_INVALID_PACKET_DESCRIPTION;
}
BOOL bXFound = FALSE;
BOOL bYFound = FALSE;
for (ULONG ulIndex = 0; ulIndex < pPacketDesc->cPacketProperties; ulIndex++)
{
if (IsEqualGUID(pPacketDesc->pPacketProperties[ulIndex].guid, s_guid_x))
{
bXFound = TRUE;
ulXIndex = ulIndex;
}
else if (IsEqualGUID(pPacketDesc->pPacketProperties[ulIndex].guid, s_guid_y))
{
bYFound = TRUE;
ulYIndex = ulIndex;
}
if (bXFound && bYFound)
break;
}
if (!bXFound || !bYFound) // X- or Y-coordinates are
{ // not part of the packet!
return TPC_E_INVALID_PACKET_DESCRIPTION;
}
}
else // Preferred packet description
{
ulXIndex = 0;
ulYIndex = 1;
}
// Get ready to copy the ink points to MY_STROKE struct
MY_STROKE *pStroke = new MY_STROKE;
if( !pStroke )
{
goto OutOfMemory;
}
pStroke->aPoints = new POINT[cPoints];
if( !pStroke->aPoints )
{
goto OutOfMemory;
}
// Copy the points
POINT *pPoint = pStroke->aPoints;
const LONG *pLongs = (const LONG *)pPacket;
for( ULONG iPoint=0; iPoint<cPoints; iPoint++ )
{
pPoint->x = *(pLongs+ulXIndex);
pPoint->y = *(pLongs+ulYIndex);
pPoint++;
pLongs += ulPacketSize;
}
pStroke->cPoints = cPoints;
// Transform points from Tablet space to ink space
Transform(pXForm, pStroke->aPoints, cPoints);
// Insert the new stroke at front of the list
pStroke->pNext = pRC->pStrokeList;
pRC->pStrokeList = pStroke;
pRC->cStrokes++; // Update number of strokes
// Update number of points in all strokes.
// (We track this for our example. It is not essential.)
pRC->cPointsTot += cPoints;
return S_OK;
OutOfMemory:
if( pStroke )
{
if( pStroke->aPoints )
{
delete [] pStroke->aPoints;
}
delete pStroke;
}
return E_OUTOFMEMORY;
}
HRESULT WINAPI GetBestResultString(HRECOCONTEXT hrc, __inout ULONG *pcTCH, __out_ecount_opt(*pcTCH) PTCH* pwcBestResult)
{
// Return the recognition result string that was computed in Process().
// Note: pwcBestResult does not include a NULL-terminator, nor does the
// buffer length count a NULL-terminator.
HRESULT hr = S_OK;
if( !hrc || !pcTCH )
{
return E_POINTER;
}
MY_RECOCONTEXT *pRC = (MY_RECOCONTEXT*) hrc;
if( !pRC->wzBestResult[0] ) // No reco result available
{
return TPC_E_NOT_RELEVANT;
}
ULONG cWChar = wcsnlen( pRC->wzBestResult, ARRAYSIZE(pRC->wzBestResult) );
if( !pwcBestResult ) // Caller is querying for buffer size
{
*pcTCH = cWChar;
return S_OK;
}
memcpy_s( pwcBestResult, *pcTCH*sizeof(WCHAR), pRC->wzBestResult, cWChar*sizeof(WCHAR) );
if( cWChar > *pcTCH )
{
hr = TPC_S_TRUNCATED;
}
*pcTCH = cWChar;
return hr;
}
HRESULT WINAPI DestroyAlternate(HRECOALT hrcalt)
{
UNREFERENCED_PARAMETER(hrcalt);
return E_NOTIMPL;
}
HRESULT WINAPI SetGuide(HRECOCONTEXT hrc, const RECO_GUIDE* pGuide, ULONG iIndex)
{
if( !hrc )
{
return E_POINTER;
}
MY_RECOCONTEXT *pRC = (MY_RECOCONTEXT*) hrc;
if( pGuide ) // pGuide not NULL means lined or boxed mode
{
if ((pGuide->cHorzBox < 0 || pGuide->cVertBox < 0) || // invalid
(pGuide->cHorzBox > 0 && pGuide->cVertBox == 0)) // vertical lined mode
{
return E_INVALIDARG;
}
}
// If there is no guide already present, allocate one
if (!pRC->pGuide)
{
pRC->pGuide = new RECO_GUIDE;
}
if (!pRC->pGuide)
{
return E_OUTOFMEMORY;
}
if (pGuide)
*(pRC->pGuide) = *pGuide;
else
{
ZeroMemory(pRC->pGuide, sizeof(RECO_GUIDE)); // free mode
}
pRC->uiGuideIndex = iIndex;
return S_OK;
}
HRESULT WINAPI GetGuide(HRECOCONTEXT hrc, RECO_GUIDE* pGuide, ULONG *piIndex)
{
if( !hrc || !pGuide || !piIndex )
{
return E_POINTER;
}
MY_RECOCONTEXT *pRC = (MY_RECOCONTEXT*) hrc;
if( !pRC->pGuide )
{
return S_FALSE;
}
*pGuide = *(pRC->pGuide);
*piIndex = pRC->uiGuideIndex;
return S_OK;
}
HRESULT WINAPI AdviseInkChange(HRECOCONTEXT hrc, BOOL bNewStroke)
{
UNREFERENCED_PARAMETER(hrc);
UNREFERENCED_PARAMETER(bNewStroke);
return S_OK;
}
HRESULT WINAPI SetCACMode(HRECOCONTEXT hrc, int iMode)
{
UNREFERENCED_PARAMETER(hrc);
UNREFERENCED_PARAMETER(iMode);
return E_NOTIMPL;
}
HRESULT WINAPI CloneContext(HRECOCONTEXT hrc, HRECOCONTEXT* pCloneHrc)
{
UNREFERENCED_PARAMETER(hrc);
UNREFERENCED_PARAMETER(pCloneHrc);
return E_NOTIMPL;
}
HRESULT WINAPI ResetContext(HRECOCONTEXT hrc)
{
// Deletes the current ink and recognition results from the context.
if( !hrc )
{
return E_POINTER;
}
MY_RECOCONTEXT *pRC = (MY_RECOCONTEXT*) hrc;
DestroyStrokeList( pRC->pStrokeList ); pRC->pStrokeList = NULL;
pRC->cStrokes = 0;
pRC->cPointsTot = 0;
pRC->wzBestResult[0] = 0;
if( pRC->pLattice )
{
DestroyLattice( pRC->pLattice ); pRC->pLattice = NULL;
}
return S_OK;
}
HRESULT WINAPI Process(HRECOCONTEXT hrc, BOOL *pbPartialProcessing)
{
// Recognize the strokes in the given context.
// We don't actually recognize anything. Instead we illustrate how
// to process the ink and guide information so that you can provide
// your own recognition algorithm.
int iRet = S_OK;
BYTE *abIsBoxDirty = NULL;
if( !hrc || !pbPartialProcessing )
{
return E_POINTER;
}
MY_RECOCONTEXT *pRC = (MY_RECOCONTEXT*) hrc;
if( !pRC->cStrokes )
{
iRet = S_OK;
goto Exit;
}
if( !pRC->pStrokeList )
{
iRet = E_FAIL;
goto Exit;
}
HRESULT hr = StringCchPrintfW( pRC->wzBestResult, ARRAYSIZE(pRC->wzBestResult), L"Strokes=%d Points=%d",
pRC->cStrokes, pRC->cPointsTot );
if( FAILED(hr) )
{
iRet = E_FAIL;
goto Exit;
}
// Find number of rows and columns in guide.
// Determine if lined mode.
ULONG cRow = 0;
ULONG cCol = 0;
bool bIsLined = false;
if( pRC->pGuide )
{
cRow = pRC->pGuide->cVertBox;
cCol = pRC->pGuide->cHorzBox;
if( cRow ) // lined or boxed mode
{
if( !cCol ) // lined mode
{
cCol = 1;
bIsLined = true;
}
}
}
if( !cRow ) // free mode.
{
goto Exit;
}
// At this point we are in either lined mode or boxed mode but
// not free mode. The remainder of this routine enumerates the
// lines or boxes containing ink.
// Allocate 2D array of booleans to keep track of which boxes contain ink points.
// For lined mode, the array has a single column.
if( ULONG_MAX / cRow < cCol )
{
assert(0 && "Overflow");
iRet = E_FAIL;
goto Exit;
}
abIsBoxDirty = new BYTE[cRow*cCol];
if( !abIsBoxDirty )
{
iRet = E_FAIL;
goto Exit;
}
ZeroMemory( abIsBoxDirty, cRow*cCol*sizeof(BYTE) );
// Scan through the ink to mark boxes containing ink points
MY_STROKE *pStroke = pRC->pStrokeList;
for( ;pStroke; pStroke = pStroke->pNext )
{
POINT *pPoint = pStroke->aPoints;
for( ULONG iPoint=0; iPoint < pStroke->cPoints; iPoint++, pPoint++ )
{
ULONG iRow = (pPoint->y - pRC->pGuide->yOrigin) / pRC->pGuide->cyBox;
ULONG iCol = bIsLined ? 0 : (pPoint->x - pRC->pGuide->xOrigin) / pRC->pGuide->cxBox;
if( iRow >= cRow || iCol >= cCol )
{
assert(0 && "Buffer overrun");
iRet = E_FAIL;
goto Exit;
}
abIsBoxDirty[iRow*cCol + iCol] = 1;
}
}
// Prepare to concatenate line/box numbers to the result
hr = StringCchCatW(
pRC->wzBestResult,
ARRAYSIZE(pRC->wzBestResult),
bIsLined ? L" Lines used=" : L" Boxes used=" );
if( FAILED(hr) )
{
iRet = E_FAIL;
goto Exit;
}
// Concatenate the numbers iteratively to the end of the result string.
// For simplicity, we opt for a less efficient implementation which
// scans for the end of the result string for each concatenation.
bool bIsTruncated = false; // true if result string runs out of space
for( ULONG iRow=0; iRow < cRow && !bIsTruncated; iRow++ )
{
for( ULONG iCol=0; iCol < cCol && !bIsTruncated; iCol++ )
{
if( abIsBoxDirty[iRow*cCol + iCol] )
{
// Get the next item to concatenate
WCHAR wzTmp[20];
if( bIsLined )
{
hr = StringCchPrintfW( wzTmp, ARRAYSIZE(wzTmp), L"%d ", iRow );
if( FAILED(hr) )
{
iRet = E_FAIL;
goto Exit;
}
}
else
{
hr = StringCchPrintfW( wzTmp, ARRAYSIZE(wzTmp), L"(%d,%d)", iRow, iCol );
if( FAILED(hr) )
{
iRet = E_FAIL;
goto Exit;
}
}
// Concatenate the item to the end of the result
hr = StringCchCatW( pRC->wzBestResult, ARRAYSIZE(pRC->wzBestResult), wzTmp );
if( FAILED(hr) )
{
// overwrite tail of wzBestResult with "<truncated>"
const WCHAR wzTrunc[] = L"<truncated>";
const size_t len = ARRAYSIZE(wzTrunc);
hr = StringCchCopyW(
pRC->wzBestResult+ARRAYSIZE(pRC->wzBestResult)-len,
len,
wzTrunc);
if( FAILED(hr) )
{
iRet = E_FAIL;
goto Exit;
}
bIsTruncated = true;
}
}
}
}
Exit:
*pbPartialProcessing = FALSE; // No more ink to process
if( abIsBoxDirty )
{
delete [] abIsBoxDirty;
}
return iRet;
}
HRESULT WINAPI SetFactoid(HRECOCONTEXT hrc, ULONG cwcFactoid, const WCHAR *pwcFactoid)
{
UNREFERENCED_PARAMETER(hrc);
UNREFERENCED_PARAMETER(cwcFactoid);
UNREFERENCED_PARAMETER(pwcFactoid);
return S_OK; // ignore factoid
}
HRESULT WINAPI SetFlags(HRECOCONTEXT hrc, DWORD dwFlags)
{
UNREFERENCED_PARAMETER(hrc);
UNREFERENCED_PARAMETER(dwFlags);
return S_OK; // ignore flags
}
static void DestroyLattice( RECO_LATTICE *pLattice )
{
if( !pLattice )
{
return;
}
if( pLattice->pLatticeColumns )
{
if( pLattice->pLatticeColumns->pStrokes )
{
delete [] pLattice->pLatticeColumns->pStrokes;
}
if( pLattice->pLatticeColumns->pLatticeElements )
{
delete [] pLattice->pLatticeColumns->pLatticeElements;
}
delete [] pLattice->pLatticeColumns;
}
if( pLattice->pulBestResultColumns )
{
delete [] pLattice->pulBestResultColumns;
}
if( pLattice->pulBestResultIndexes )
{
delete [] pLattice->pulBestResultIndexes;
}
delete pLattice;
}
HRESULT WINAPI GetLatticePtr(HRECOCONTEXT hrc, RECO_LATTICE **ppLattice)
{
// We trivialize the lattice by providing just
// one segmentation using all the strokes, and just one
// recognition result with no alternates.
if( !hrc )
{
return E_POINTER;
}
if( !ppLattice )
{
return E_POINTER;
}
MY_RECOCONTEXT *pRC = (MY_RECOCONTEXT*) hrc;
if( !pRC->wzBestResult[0] ) // No reco result available
{
return TPC_E_NOT_RELEVANT;
}
if( pRC->pLattice ) // free existing lattice data
{
DestroyLattice( pRC->pLattice ); pRC->pLattice = NULL;
}
// RECO_LATTICE initialization
RECO_LATTICE *pLattice = pRC->pLattice = new RECO_LATTICE;
if( !pLattice )
{
return E_OUTOFMEMORY;
}
ZeroMemory( pLattice, sizeof(RECO_LATTICE) );
pLattice->ulColumnCount = 1;
pLattice->pLatticeColumns = new RECO_LATTICE_COLUMN[pLattice->ulColumnCount];
if( !pLattice->pLatticeColumns )
{
goto OutOfMemory;
}
ZeroMemory( pLattice->pLatticeColumns, sizeof(RECO_LATTICE_COLUMN) );
pLattice->ulPropertyCount = 0;
pLattice->pGuidProperties = NULL;
pLattice->ulBestResultColumnCount = 1;
pLattice->pulBestResultColumns = new ULONG[pLattice->ulBestResultColumnCount];
if( !pLattice->pulBestResultColumns )
{
goto OutOfMemory;
}
pLattice->pulBestResultColumns[0] = 0;
pLattice->pulBestResultIndexes = new ULONG[1];
if( !pLattice->pulBestResultIndexes )
{
goto OutOfMemory;
}
pLattice->pulBestResultIndexes[0] = 0;
// RECO_LATTICE_COLUMN initialization
// We have just one Lattice Column to initialize
RECO_LATTICE_COLUMN *pLatticeColumn = pLattice->pLatticeColumns;
pLatticeColumn->key = 0;
pLatticeColumn->cpProp.cProperties = 0;
pLatticeColumn->cpProp.apProps = NULL;
// fake the stroke mapping:
pLatticeColumn->cStrokes = pRC->cStrokes;
pLatticeColumn->pStrokes = new ULONG[pRC->cStrokes];
if( !pLatticeColumn->pStrokes )
{
goto OutOfMemory;
}
for( ULONG ii=0; ii<pRC->cStrokes; ii++ )
{
pLatticeColumn->pStrokes[ii] = ii;
}
pLatticeColumn->cLatticeElements = 1;
pLatticeColumn->pLatticeElements = new RECO_LATTICE_ELEMENT[pLatticeColumn->cLatticeElements];
if( !pLatticeColumn->pLatticeElements )
{
goto OutOfMemory;
}
// RECO_LATTICE_ELEMENT initialization
// We have just one Column Element to initialize
RECO_LATTICE_ELEMENT *pLatticeElement = pLatticeColumn->pLatticeElements;
pLatticeElement->score = 0;
pLatticeElement->type = RECO_TYPE_WSTRING;
pLatticeElement->pData = (BYTE*) pRC->wzBestResult;
pLatticeElement->ulNextColumn = 1;
pLatticeElement->ulStrokeNumber = pRC->cStrokes;
pLatticeElement->epProp.cProperties = 0;
pLatticeElement->epProp.apProps = NULL;
*ppLattice = pLattice;
return S_OK;
OutOfMemory:
if( pLattice->pLatticeColumns )
{
if( pLattice->pLatticeColumns->pStrokes )
{
delete [] pLattice->pLatticeColumns->pStrokes;
}
if( pLattice->pLatticeColumns->pLatticeElements )
{
delete [] pLattice->pLatticeColumns->pLatticeElements;
}
delete [] pLattice->pLatticeColumns;
}
if( pLattice->pulBestResultColumns )
{
delete [] pLattice->pulBestResultColumns;
}
if( pLattice->pulBestResultIndexes )
{
delete [] pLattice->pulBestResultIndexes;
}
if( pLattice )
{
delete pLattice;
}
return E_OUTOFMEMORY;
}
HRESULT WINAPI SetTextContext(HRECOCONTEXT hrc, ULONG cwcBefore, const WCHAR *pwcBefore, ULONG cwcAfter, const WCHAR *pwcAfter)
{
UNREFERENCED_PARAMETER(hrc);
UNREFERENCED_PARAMETER(cwcBefore);
UNREFERENCED_PARAMETER(pwcBefore);
UNREFERENCED_PARAMETER(cwcAfter);
UNREFERENCED_PARAMETER(pwcAfter);
return E_NOTIMPL;
}
HRESULT WINAPI GetEnabledUnicodeRanges(HRECOCONTEXT hrc, ULONG *pcRanges, CHARACTER_RANGE *pcr)
{
UNREFERENCED_PARAMETER(hrc);
UNREFERENCED_PARAMETER(pcRanges);
UNREFERENCED_PARAMETER(pcr);
return E_NOTIMPL;
}
HRESULT WINAPI SetEnabledUnicodeRanges(HRECOCONTEXT hrc, ULONG cRanges, CHARACTER_RANGE *pcr)
{
UNREFERENCED_PARAMETER(hrc);
UNREFERENCED_PARAMETER(cRanges);
UNREFERENCED_PARAMETER(pcr);
return E_NOTIMPL;
}
HRESULT WINAPI GetContextPropertyList(HRECOCONTEXT hrc, ULONG *pcProperties, GUID *pPropertyGUIDS)
{
UNREFERENCED_PARAMETER(hrc);
UNREFERENCED_PARAMETER(pcProperties);
UNREFERENCED_PARAMETER(pPropertyGUIDS);
return E_NOTIMPL;
}
HRESULT WINAPI GetContextPropertyValue(HRECOCONTEXT hrc, GUID *pGuid, ULONG *pcbSize, BYTE *pProperty)
{
UNREFERENCED_PARAMETER(hrc);
UNREFERENCED_PARAMETER(pGuid);
UNREFERENCED_PARAMETER(pcbSize);
UNREFERENCED_PARAMETER(pProperty);
return E_NOTIMPL;
}
HRESULT WINAPI SetContextPropertyValue(HRECOCONTEXT hrc, GUID *pGuid, ULONG cbSize, BYTE *pProperty)
{
UNREFERENCED_PARAMETER(hrc);
UNREFERENCED_PARAMETER(pGuid);
UNREFERENCED_PARAMETER(cbSize);
UNREFERENCED_PARAMETER(pProperty);
return E_NOTIMPL;
}
HRESULT WINAPI IsStringSupported(HRECOCONTEXT hrc, ULONG wcString, const WCHAR *pwcString)
{
UNREFERENCED_PARAMETER(hrc);
UNREFERENCED_PARAMETER(wcString);
UNREFERENCED_PARAMETER(pwcString);
return E_NOTIMPL;
}
HRESULT WINAPI SetWordList(HRECOCONTEXT hrc, HRECOWORDLIST hwl)
{
UNREFERENCED_PARAMETER(hrc);
UNREFERENCED_PARAMETER(hwl);
return E_NOTIMPL;
}
HRESULT WINAPI GetContextPreferenceFlags(HRECOCONTEXT hrc, DWORD *pdwContextPreferenceFlags)
{
UNREFERENCED_PARAMETER(hrc);
UNREFERENCED_PARAMETER(pdwContextPreferenceFlags);
return E_NOTIMPL;
}
HRESULT WINAPI GetRightSeparator(HRECOCONTEXT hrc, __inout ULONG *pcSize, __out_ecount(*pcSize) OPTIONAL WCHAR* pwcRightSeparator)
{
UNREFERENCED_PARAMETER(hrc);
UNREFERENCED_PARAMETER(pcSize);
UNREFERENCED_PARAMETER(pwcRightSeparator);
return E_NOTIMPL;
}
HRESULT WINAPI GetLeftSeparator(HRECOCONTEXT hrc, __inout ULONG *pcSize, __out_ecount(*pcSize) OPTIONAL WCHAR* pwcLeftSeparator)
{
UNREFERENCED_PARAMETER(hrc);
UNREFERENCED_PARAMETER(pcSize);
UNREFERENCED_PARAMETER(pwcLeftSeparator);
return E_NOTIMPL;
}
////////////////////////
// IRecoWordList
////////////////////////
HRESULT WINAPI DestroyWordList(HRECOWORDLIST hwl)
{
UNREFERENCED_PARAMETER(hwl);
return E_NOTIMPL;
}
HRESULT WINAPI AddWordsToWordList(HRECOWORDLIST hwl, __in WCHAR *pwcWords)
{
UNREFERENCED_PARAMETER(hwl);
UNREFERENCED_PARAMETER(pwcWords);
return E_NOTIMPL;
}
HRESULT WINAPI MakeWordList(HRECOGNIZER hrec, __in WCHAR *pBuffer, HRECOWORDLIST *phwl)
{
UNREFERENCED_PARAMETER(hrec);
UNREFERENCED_PARAMETER(pBuffer);
UNREFERENCED_PARAMETER(phwl);
return E_NOTIMPL;
}
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