170 lines
3.6 KiB
C
170 lines
3.6 KiB
C
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/*++
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* File name:
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* bmpcache.c
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* Contents:
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* Bitmap cache interface for tclinet
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* Bitmap compare code
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*
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* Copyright (C) 1998-1999 Microsoft Corp.
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--*/
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#include <windows.h>
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#include <memory.h>
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#include "protocol.h"
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#include "tclient.h"
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#include "gdata.h"
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#include "bmpdb.h"
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PGROUPENTRY g_pCache = NULL;
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// The bitmap manager is not thread safe
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#define ENTER_CRIT EnterCriticalSection(g_lpcsGuardWaitQueue);
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#define LEAVE_CRIT LeaveCriticalSection(g_lpcsGuardWaitQueue);
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/*++
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* Function:
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* InitCache
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* Description:
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* Inits global data and the cache manager
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* Called by:
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* InitDone
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--*/
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VOID InitCache(VOID)
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{
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ENTER_CRIT
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OpenDB(FALSE);
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g_pCache = GetGroupList();
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LEAVE_CRIT
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}
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/*++
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* Function:
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* DeleteCache
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* Description:
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* Deletes all linked lists and closes the manager opened
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* by InitCache
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* Called by:
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* InitDone
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--*/
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VOID DeleteCache(VOID)
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{
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PGROUPENTRY pIter;
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ENTER_CRIT
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// Clean the cache
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pIter = g_pCache;
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while(pIter)
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{
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FreeBitmapList(pIter->pBitmap);
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pIter = pIter->pNext;
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}
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FreeGroupList(g_pCache);
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g_pCache = NULL;
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CloseDB();
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LEAVE_CRIT
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}
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/*++
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* Function:
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* BitmapCacheLookup
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* Description:
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* Retrieves all bitmaps with specific ID
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--*/
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PBMPENTRY BitmapCacheLookup(LPCWSTR szWText)
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{
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PGROUPENTRY pIter;
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PBMPENTRY rv = NULL;
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FOFFSET lGrpOffs;
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ENTER_CRIT
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pIter = g_pCache;
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while(pIter && wcscmp(pIter->WText, szWText))
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{
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pIter = pIter->pNext;
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}
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if (!pIter)
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goto exitpt;
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if (!pIter->pBitmap)
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pIter->pBitmap = GetBitmapList(NULL, pIter->FOffsBmp);
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rv = pIter->pBitmap;
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exitpt:
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LEAVE_CRIT
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return rv;
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}
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/*++
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* Function:
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* Glyph2String
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* Description:
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* Gets the ID for matching bimtap
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* Arguments:
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* pBmpFeed - Bitmap
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* wszString - buffer for the ID
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* max - buffer length
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* Return value:
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* TRUE if matching bitmap is found
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* Called by:
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* GlyphReceived running within feedback thread
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--*/
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BOOL Glyph2String(PBMPFEEDBACK pBmpFeed, LPWSTR wszString, UINT max)
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{
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UINT nChkSum, nFeedSize;
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PGROUPENTRY pGroup;
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PBMPENTRY pBitmap;
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BOOL rv = FALSE;
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nFeedSize = pBmpFeed->bmpsize + pBmpFeed->bmiSize;
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nChkSum = CheckSum(&(pBmpFeed->BitmapInfo), nFeedSize);
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ENTER_CRIT
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pGroup = g_pCache;
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// Go thru all groups
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while (pGroup)
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{
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pBitmap = pGroup->pBitmap;
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if (!pBitmap)
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// Read the bitmap list if necessesary
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pBitmap = pGroup->pBitmap = GetBitmapList(NULL, pGroup->FOffsBmp);
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// and bitmaps
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while(pBitmap)
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{
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// Compare the bitmaps
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if (pBitmap->nChkSum == nChkSum &&
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pBitmap->xSize == pBmpFeed->xSize &&
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pBitmap->ySize == pBmpFeed->ySize &&
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pBitmap->bmiSize == pBmpFeed->bmiSize &&
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pBitmap->bmpSize == pBmpFeed->bmpsize &&
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!memcmp(pBitmap->pData, &(pBmpFeed->BitmapInfo), nFeedSize))
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{
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// OK, copy the string
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UINT strl = wcslen(pGroup->WText);
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if (strl > max - 1)
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strl = max - 1;
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wcsncpy(wszString, pGroup->WText, strl);
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wszString[strl] = 0;
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rv = TRUE;
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goto exitpt;
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}
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pBitmap = pBitmap->pNext;
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}
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pGroup = pGroup->pNext;
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}
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exitpt:
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LEAVE_CRIT
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return rv;
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}
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