mirror of
https://github.com/libretro/scummvm.git
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136 lines
2.9 KiB
C++
136 lines
2.9 KiB
C++
/* ScummVM - Scumm Interpreter
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* Copyright (C) 2006 The ScummVM project
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program 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 General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* $URL$
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* $Id$
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*/
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#ifndef GRAPHICS_IFF_H
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#define GRAPHICS_IFF_H
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#include "common/iff_container.h"
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namespace Graphics {
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struct Surface;
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struct BMHD {
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uint16 width, height;
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uint16 x, y;
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byte depth;
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byte masking;
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byte pack;
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byte flags;
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uint16 transparentColor;
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byte xAspect, yAspect;
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uint16 pageWidth, pageHeight;
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BMHD() {
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memset(this, 0, sizeof(*this));
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}
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};
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// handles ILBM subtype of IFF FORM files
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//
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class ILBMDecoder : public Common::IFFParser {
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protected:
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void readBMHD(Common::IFFChunk &chunk);
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void readCMAP(Common::IFFChunk &chunk);
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void readBODY(Common::IFFChunk &chunk);
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BMHD _bitmapHeader;
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uint32 _colorCount;
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Surface *_surface;
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byte **_colors;
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void fillPlane(byte *out, byte* buf, uint32 width, uint32 plane);
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public:
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ILBMDecoder(Common::ReadStream &input, Surface &surface, byte *&colors);
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virtual ~ILBMDecoder() { }
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void decode();
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};
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// handles PBM subtype of IFF FORM files
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//
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class PBMDecoder : public Common::IFFParser {
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protected:
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void readBMHD(Common::IFFChunk &chunk);
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void readCMAP(Common::IFFChunk &chunk);
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void readBODY(Common::IFFChunk &chunk);
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BMHD _bitmapHeader;
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uint32 _colorCount;
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Surface *_surface;
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byte **_colors;
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public:
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PBMDecoder(Common::ReadStream &input, Surface &surface, byte *&colors);
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virtual ~PBMDecoder() { }
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void decode();
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};
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void decodePBM(Common::ReadStream &input, Surface &surface, byte *&colors);
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/*
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PackBits is a RLE compression algorithm introduced
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by Apple. It is also used to encode ILBM and PBM
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subtypes of IFF files, and some flavours of TIFF.
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The following implementation uses a static storage
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and is buffered, that means you can't destroy the
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input stream before you are done with it.
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*/
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class PackBitsReadStream : public Common::ReadStream {
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protected:
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Common::ReadStream *_input;
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byte _storage[257];
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byte *_wStoragePos;
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byte *_rStoragePos;
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byte* _out;
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byte* _outEnd;
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int32 _fed;
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int32 _unpacked;
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void store(byte b);
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void feed();
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void unpack();
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public:
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PackBitsReadStream(Common::ReadStream &input);
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~PackBitsReadStream();
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virtual bool eos() const;
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uint32 read(void *dataPtr, uint32 dataSize);
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};
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}
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#endif
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