diff options
Diffstat (limited to 'vcl/source/filter/igif/gifread.hxx')
| -rw-r--r-- | vcl/source/filter/igif/gifread.hxx | 133 |
1 files changed, 133 insertions, 0 deletions
diff --git a/vcl/source/filter/igif/gifread.hxx b/vcl/source/filter/igif/gifread.hxx new file mode 100644 index 000000000000..35d9b3aa250d --- /dev/null +++ b/vcl/source/filter/igif/gifread.hxx @@ -0,0 +1,133 @@ +/* -*- 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: */ |