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/*************************************************************************
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* Copyright 2008 by Sun Microsystems, Inc.
*
* OpenOffice.org - a multi-platform office productivity suite
*
* $RCSfile: gifread.hxx,v $
* $Revision: 1.6 $
*
* This file is part of OpenOffice.org.
*
* OpenOffice.org is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License version 3
* only, as published by the Free Software Foundation.
*
* OpenOffice.org 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 version 3 for more details
* (a copy is included in the LICENSE file that accompanied this code).
*
* You should have received a copy of the GNU Lesser General Public License
* version 3 along with OpenOffice.org. If not, see
* <http://www.openoffice.org/license.html>
* for a copy of the LGPLv3 License.
*
************************************************************************/
#ifndef _GIFREAD_HXX
#define _GIFREAD_HXX
#ifndef _GRAPH_HXX
#include <vcl/graph.hxx>
#endif
#ifndef _BMPACC_HXX
#include <vcl/bmpacc.hxx>
#endif
#ifdef _GIFPRIVATE
// ---------
// - Enums -
// ---------
enum GIFAction
{
GLOBAL_HEADER_READING,
MARKER_READING,
EXTENSION_READING,
LOCAL_HEADER_READING,
FIRST_BLOCK_READING,
NEXT_BLOCK_READING,
ABORT_READING,
END_READING
};
// ------------------------------------------------------------------------
enum ReadState
{
GIFREAD_OK,
GIFREAD_ERROR,
GIFREAD_NEED_MORE
};
// -------------
// - GIFReader -
// -------------
class GIFLZWDecompressor;
class SvStream;
class GIFReader : public GraphicReader
{
Graphic aImGraphic;
Animation aAnimation;
Bitmap aBmp8;
Bitmap aBmp1;
BitmapPalette aGPalette;
BitmapPalette aLPalette;
SvStream& rIStm;
void* pCallerData;
HPBYTE pSrcBuf;
GIFLZWDecompressor* pDecomp;
BitmapWriteAccess* pAcc8;
BitmapWriteAccess* pAcc1;
long nYAcc;
long nLastPos;
sal_uInt32 nLogWidth100;
sal_uInt32 nLogHeight100;
USHORT nTimer;
USHORT nGlobalWidth; // maximale Bildbreite aus Header
USHORT nGlobalHeight; // maximale Bildhoehe aus Header
USHORT nImageWidth; // maximale Bildbreite aus Header
USHORT nImageHeight; // maximale Bildhoehe aus Header
USHORT nImagePosX;
USHORT nImagePosY;
USHORT nImageX; // maximale Bildbreite aus Header
USHORT nImageY; // maximale Bildhoehe aus Header
USHORT nLastImageY;
USHORT nLastInterCount;
USHORT nLoops;
GIFAction eActAction;
BOOL bStatus;
BOOL bGCTransparent; // Ob das Bild Transparent ist, wenn ja:
BOOL bInterlaced;
BOOL bOverreadBlock;
BOOL bImGraphicReady;
BOOL bGlobalPalette;
BYTE nBackgroundColor; // Hintergrundfarbe
BYTE nGCTransparentIndex; // Pixel von diesem Index sind durchsichtig
BYTE nGCDisposalMethod; // 'Disposal Method' (siehe GIF-Doku)
BYTE cTransIndex1;
BYTE cNonTransIndex1;
void ReadPaletteEntries( BitmapPalette* pPal, ULONG nCount );
void ClearImageExtensions();
BOOL CreateBitmaps( long nWidth, long nHeight, BitmapPalette* pPal, BOOL bWatchForBackgroundColor );
BOOL ReadGlobalHeader();
BOOL ReadExtension();
BOOL ReadLocalHeader();
ULONG ReadNextBlock();
void FillImages( HPBYTE pBytes, ULONG nCount );
void CreateNewBitmaps();
BOOL ProcessGIF();
public:
ReadState ReadGIF( Graphic& rGraphic );
const Graphic& GetIntermediateGraphic();
GIFReader( SvStream& rStm );
virtual ~GIFReader();
};
#endif // _GIFPRIVATE
// -------------
// - ImportGIF -
// -------------
BOOL ImportGIF( SvStream& rStream, Graphic& rGraphic );
#endif // _GIFREAD_HXX
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