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