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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0 .
*/
#ifndef INCLUDED_VCL_SOURCE_FILTER_IGIF_GIFREAD_HXX
#define INCLUDED_VCL_SOURCE_FILTER_IGIF_GIFREAD_HXX
#include <vcl/graph.hxx>
#include <vcl/bitmapaccess.hxx>
#ifdef _GIFPRIVATE
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
};
class GIFLZWDecompressor;
class SvStream;
class GIFReader : public GraphicReader
{
Graphic aImGraphic;
Animation aAnimation;
Bitmap aBmp8;
Bitmap aBmp1;
BitmapPalette aGPalette;
BitmapPalette aLPalette;
SvStream& rIStm;
sal_uInt8* pSrcBuf;
GIFLZWDecompressor* pDecomp;
BitmapWriteAccess* pAcc8;
BitmapWriteAccess* pAcc1;
long nYAcc;
long nLastPos;
sal_uInt32 nLogWidth100;
sal_uInt32 nLogHeight100;
sal_uInt16 nTimer;
sal_uInt16 nGlobalWidth; // maximum imagewidth from header
sal_uInt16 nGlobalHeight; // maximum imageheight from header
sal_uInt16 nImageWidth; // maximum screenwidth from header
sal_uInt16 nImageHeight; // maximum screenheight from header
sal_uInt16 nImagePosX;
sal_uInt16 nImagePosY;
sal_uInt16 nImageX; // maximum screenwidth from header
sal_uInt16 nImageY; // maximum screenheight from header
sal_uInt16 nLastImageY;
sal_uInt16 nLastInterCount;
sal_uInt16 nLoops;
GIFAction eActAction;
bool bStatus;
bool bGCTransparent; // is the image transparent, if yes:
bool bInterlaced;
bool bOverreadBlock;
bool bImGraphicReady;
bool bGlobalPalette;
sal_uInt8 nBackgroundColor; // backgroundcolour
sal_uInt8 nGCTransparentIndex; // pixels of this index are transparant
sal_uInt8 nGCDisposalMethod; // 'Disposal Method' (see GIF docs)
sal_uInt8 cTransIndex1;
sal_uInt8 cNonTransIndex1;
void ReadPaletteEntries( BitmapPalette* pPal, sal_uLong nCount );
void ClearImageExtensions();
void CreateBitmaps( long nWidth, long nHeight, BitmapPalette* pPal, bool bWatchForBackgroundColor );
bool ReadGlobalHeader();
bool ReadExtension();
bool ReadLocalHeader();
sal_uLong ReadNextBlock();
void FillImages( sal_uInt8* pBytes, sal_uLong nCount );
void CreateNewBitmaps();
bool ProcessGIF();
public:
ReadState ReadGIF( Graphic& rGraphic );
const Graphic& GetIntermediateGraphic();
explicit GIFReader( SvStream& rStm );
virtual ~GIFReader();
};
#endif // _GIFPRIVATE
VCL_DLLPUBLIC bool ImportGIF( SvStream& rStream, Graphic& rGraphic );
#endif // INCLUDED_VCL_SOURCE_FILTER_IGIF_GIFREAD_HXX
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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