133 lines
4.4 KiB
C++
133 lines
4.4 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* This file incorporates work covered by the following license notice:
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.apache.org/licenses/LICENSE-2.0 .
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*/
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#ifndef _GIFREAD_HXX
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#define _GIFREAD_HXX
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#include <vcl/graph.hxx>
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#include <vcl/bmpacc.hxx>
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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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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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sal_uInt16 nTimer;
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sal_uInt16 nGlobalWidth; // maximale Bildbreite aus Header
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sal_uInt16 nGlobalHeight; // maximale Bildhoehe aus Header
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sal_uInt16 nImageWidth; // maximale Bildbreite aus Header
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sal_uInt16 nImageHeight; // maximale Bildhoehe aus Header
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sal_uInt16 nImagePosX;
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sal_uInt16 nImagePosY;
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sal_uInt16 nImageX; // maximale Bildbreite aus Header
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sal_uInt16 nImageY; // maximale Bildhoehe aus Header
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sal_uInt16 nLastImageY;
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sal_uInt16 nLastInterCount;
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sal_uInt16 nLoops;
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GIFAction eActAction;
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sal_Bool bStatus;
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sal_Bool bGCTransparent; // Ob das Bild Transparent ist, wenn ja:
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sal_Bool bInterlaced;
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sal_Bool bOverreadBlock;
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sal_Bool bImGraphicReady;
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sal_Bool bGlobalPalette;
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sal_uInt8 nBackgroundColor; // Hintergrundfarbe
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sal_uInt8 nGCTransparentIndex; // Pixel von diesem Index sind durchsichtig
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sal_uInt8 nGCDisposalMethod; // 'Disposal Method' (siehe GIF-Doku)
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sal_uInt8 cTransIndex1;
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sal_uInt8 cNonTransIndex1;
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void ReadPaletteEntries( BitmapPalette* pPal, sal_uLong nCount );
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void ClearImageExtensions();
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sal_Bool CreateBitmaps( long nWidth, long nHeight, BitmapPalette* pPal, sal_Bool bWatchForBackgroundColor );
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sal_Bool ReadGlobalHeader();
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sal_Bool ReadExtension();
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sal_Bool ReadLocalHeader();
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sal_uLong ReadNextBlock();
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void FillImages( HPBYTE pBytes, sal_uLong nCount );
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void CreateNewBitmaps();
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sal_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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sal_Bool ImportGIF( SvStream& rStream, Graphic& rGraphic );
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#endif // _GIFREAD_HXX
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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