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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 _GIFREAD_HXX
#define _GIFREAD_HXX
#include <vcl/graph.hxx>
#include <vcl/bmpacc.hxx>
#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;
HPBYTE pSrcBuf;
GIFLZWDecompressor* pDecomp;
BitmapWriteAccess* pAcc8;
BitmapWriteAccess* pAcc1;
long nYAcc;
long nLastPos;
sal_uInt32 nLogWidth100;
sal_uInt32 nLogHeight100;
sal_uInt16 nTimer;
sal_uInt16 nGlobalWidth; // maximale Bildbreite aus Header
sal_uInt16 nGlobalHeight; // maximale Bildhoehe aus Header
sal_uInt16 nImageWidth; // maximale Bildbreite aus Header
sal_uInt16 nImageHeight; // maximale Bildhoehe aus Header
sal_uInt16 nImagePosX;
sal_uInt16 nImagePosY;
sal_uInt16 nImageX; // maximale Bildbreite aus Header
sal_uInt16 nImageY; // maximale Bildhoehe aus Header
sal_uInt16 nLastImageY;
sal_uInt16 nLastInterCount;
sal_uInt16 nLoops;
GIFAction eActAction;
sal_Bool bStatus;
sal_Bool bGCTransparent; // Ob das Bild Transparent ist, wenn ja:
sal_Bool bInterlaced;
sal_Bool bOverreadBlock;
sal_Bool bImGraphicReady;
sal_Bool bGlobalPalette;
sal_uInt8 nBackgroundColor; // Hintergrundfarbe
sal_uInt8 nGCTransparentIndex; // Pixel von diesem Index sind durchsichtig
sal_uInt8 nGCDisposalMethod; // 'Disposal Method' (siehe GIF-Doku)
sal_uInt8 cTransIndex1;
sal_uInt8 cNonTransIndex1;
void ReadPaletteEntries( BitmapPalette* pPal, sal_uLong nCount );
void ClearImageExtensions();
sal_Bool CreateBitmaps( long nWidth, long nHeight, BitmapPalette* pPal, sal_Bool bWatchForBackgroundColor );
sal_Bool ReadGlobalHeader();
sal_Bool ReadExtension();
sal_Bool ReadLocalHeader();
sal_uLong ReadNextBlock();
void FillImages( HPBYTE pBytes, sal_uLong nCount );
void CreateNewBitmaps();
sal_Bool ProcessGIF();
public:
ReadState ReadGIF( Graphic& rGraphic );
const Graphic& GetIntermediateGraphic();
GIFReader( SvStream& rStm );
virtual ~GIFReader();
};
#endif // _GIFPRIVATE
// -------------
// - ImportGIF -
// -------------
sal_Bool ImportGIF( SvStream& rStream, Graphic& rGraphic );
#endif // _GIFREAD_HXX
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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