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/*************************************************************************
*
* $RCSfile: bmcache.cxx,v $
*
* $Revision: 1.2 $
*
* last change: $Author: ka $ $Date: 2001-09-24 13:38:09 $
*
* The Contents of this file are made available subject to the terms of
* either of the following licenses
*
* - GNU Lesser General Public License Version 2.1
* - Sun Industry Standards Source License Version 1.1
*
* Sun Microsystems Inc., October, 2000
*
* GNU Lesser General Public License Version 2.1
* =============================================
* Copyright 2000 by Sun Microsystems, Inc.
* 901 San Antonio Road, Palo Alto, CA 94303, USA
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License version 2.1, as published by the Free Software Foundation.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*
*
* Sun Industry Standards Source License Version 1.1
* =================================================
* The contents of this file are subject to the Sun Industry Standards
* Source License Version 1.1 (the "License"); You may not use this file
* except in compliance with the License. You may obtain a copy of the
* License at http://www.openoffice.org/license.html.
*
* Software provided under this License is provided on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
* WITHOUT LIMITATION, WARRANTIES THAT THE SOFTWARE IS FREE OF DEFECTS,
* MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE, OR NON-INFRINGING.
* See the License for the specific provisions governing your rights and
* obligations concerning the Software.
*
* The Initial Developer of the Original Code is: Sun Microsystems, Inc.
*
* Copyright: 2000 by Sun Microsystems, Inc.
*
* All Rights Reserved.
*
* Contributor(s): _______________________________________
*
*
************************************************************************/
#pragma hdrstop
#include <limits.h> // LONG_MAX
#include <tools/solar.h>
#include <goodies/grfmgr.hxx>
#include "bmcache.hxx"
// eine Struktur fuer die Cache-Eintraege
struct BitmapCacheEntry
{
const SdPage* pPage;
GraphicObject* pGraphicObject;
sal_uInt32 nSizeBytes;
long nZoom;
};
/*************************************************************************
|*
|* Destruktor, loescht die gespeicherten Bitmaps
|*
\************************************************************************/
BitmapCache::~BitmapCache()
{
for( void* pEntry = aEntries.First(); pEntry; pEntry = aEntries.Next() )
{
delete static_cast< BitmapCacheEntry* >( pEntry )->pGraphicObject;
delete static_cast< BitmapCacheEntry* >( pEntry );
}
}
/*************************************************************************
|*
|* Cache-Eintrag einfuegen
|*
\************************************************************************/
void BitmapCache::Add(const SdPage* pPage, const Bitmap& rBmp, long nZoom)
{
BitmapCacheEntry* pEntry = NULL;
ULONG nSizeOfBitmap = rBmp.GetSizeBytes();
if( nSizeOfBitmap < nMaxSize )
{
while (nCurSize + nSizeOfBitmap > nMaxSize)
{
if( aEntries.Count() )
{
pEntry = (BitmapCacheEntry*) aEntries.Remove(aEntries.Count() - 1);
if( pEntry && pEntry->pGraphicObject )
{
nCurSize -= pEntry->nSizeBytes;
delete pEntry->pGraphicObject;
}
delete pEntry;
}
else
break;
}
pEntry = new BitmapCacheEntry;
pEntry->pPage = pPage;
pEntry->pGraphicObject = new GraphicObject( rBmp );
pEntry->nSizeBytes = nSizeOfBitmap;
pEntry->nZoom = nZoom;
aEntries.Insert( pEntry, (ULONG) 0 );
nCurSize += nSizeOfBitmap;
}
}
/*************************************************************************
|*
|* Cache-Eintrag suchen, Bitmap-Zeiger zurueckgeben (NULL, wenn Bitmap nicht
|* im Cache)
|* - auf rZoomPercent wird der Zoomfaktor der Bitmap geschrieben
|* - abs(nZoomTolerance) gibt die maximal erlaubte Abweichung des
|* Zoomfaktors an; ist die Toleranz negativ, so sucht der Cache den
|* "best fit", sonst den "first fit",
|* - es werden nur Bitmaps mit Zoomfaktoren kleiner oder gleich rZoomPercent
|* beruecksichtigt, um ein Verkleinern der Bitmap beim Zeichnen zu vermeiden
|*
\************************************************************************/
const GraphicObject* BitmapCache::Get( const SdPage* pPage, long& rZoomPercent, long nZoomTolerancePercent)
{
BitmapCacheEntry* pEntry = NULL;
GraphicObject* pGraphicObject = NULL;
if( nZoomTolerancePercent < 0 )
{
// "best fit"-Suche
long nTolerance = -nZoomTolerancePercent;
BitmapCacheEntry* pBest = NULL;
long nBest = LONG_MAX;
long nTest = 0L;
for( ULONG nPos = 0; nPos < aEntries.Count(); nPos++ )
{
pEntry = (BitmapCacheEntry*) aEntries.GetObject( nPos );
if( pEntry->pPage == pPage )
{
nTest = rZoomPercent - pEntry->nZoom;
if( nTest >= 0 && nTest < nBest && nTest <= nTolerance )
pBest = pEntry;
}
}
pEntry = pBest;
}
else
{
// "first fit"-suche
for( ULONG nPos = 0; nPos < aEntries.Count(); nPos++ )
{
pEntry = (BitmapCacheEntry*)aEntries.GetObject( nPos );
if (pEntry->pPage == pPage && Abs( pEntry->nZoom - rZoomPercent ) <= nZoomTolerancePercent )
break;
else
pEntry = NULL;
}
}
// was passendes gefunden?
if( pEntry )
{
pGraphicObject = pEntry->pGraphicObject;
aEntries.Remove( pEntry );
aEntries.Insert( pEntry, (ULONG) 0 );
rZoomPercent = pEntry->nZoom;
}
return pGraphicObject;
}
void BitmapCache::Remove( const SdPage* pPage )
{
for( ULONG nPos = 0; nPos < aEntries.Count(); )
{
BitmapCacheEntry* pCand = (BitmapCacheEntry*) aEntries.GetObject( nPos );
if( pCand->pPage == pPage )
{
pCand = (BitmapCacheEntry*) aEntries.Remove((ULONG)nPos);
delete pCand->pGraphicObject;
delete pCand;
}
else
nPos++;
}
}
|
