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-/* ScummVM - Graphic Adventure Engine
- *
- * ScummVM is the legal property of its developers, whose names
- * are too numerous to list here. Please refer to the COPYRIGHT
- * file distributed with this source distribution.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2
- * of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
- *
- */
-
-/**
- * @file
- * Image decoder used in engines:
- * - gob
- * - parallaction
- * - queen
- * - saga
- */
-
-#ifndef GRAPHICS_DECODERS_IFF_H
-#define GRAPHICS_DECODERS_IFF_H
-
-#include "common/array.h"
-#include "common/endian.h"
-
-#include "graphics/surface.h"
-#include "graphics/decoders/image_decoder.h"
-
-namespace Common {
-class SeekableReadStream;
-}
-
-namespace Graphics {
-
-struct Surface;
-
-class IFFDecoder : public ImageDecoder {
-public:
- struct Header {
- uint16 width, height;
- uint16 x, y;
- byte numPlanes;
- byte masking;
- byte compression;
- byte flags;
- uint16 transparentColor;
- byte xAspect, yAspect;
- uint16 pageWidth, pageHeight;
- };
-
- struct PaletteRange {
- int16 timer, step, flags;
- byte first, last;
- };
-
- enum Type {
- TYPE_UNKNOWN = 0,
- TYPE_ILBM,
- TYPE_PBM
- };
-
- IFFDecoder();
- virtual ~IFFDecoder();
-
- // ImageDecoder API
- void destroy();
- bool loadStream(Common::SeekableReadStream &stream);
- const Header *getHeader() const { return &_header; }
- const Surface *getSurface() const { return _surface; }
- const byte *getPalette() const { return _palette; }
- const Common::Array<PaletteRange> &getPaletteRanges() const { return _paletteRanges; }
- uint16 getPaletteColorCount() const { return _paletteColorCount; }
-
- /**
- * The number of planes to decode, also determines the pixel packing if _packPixels is true.
- * 8 == decode all planes, map 1 pixel in 1 byte. (default, no packing even if _packPixels is true)
- *
- * NOTE: this property must be reset manually, and is not reset by a call to destroy().
- */
- void setNumRelevantPlanes(const uint8 numRelevantPlanes) { _numRelevantPlanes = numRelevantPlanes; }
-
- /**
- * Enables pixel packing, the amount of packing is determined by _numRelevantPlanes
- * 1 == decode first plane, pack 8 pixels in 1 byte. This makes _surface->w 1/8th of _header.width
- * 2 == decode first 2 planes, pack 4 pixels in 1 byte. This makes _surface->w 1/4th of _header.width
- * 4 == decode first 4 planes, pack 2 pixels in 1 byte. This makes _surface->w half of _header.width
- * Packed bitmaps won't have a proper surface format since there is no way to tell it to use 1, 2 or 4 bits per pixel
- *
- * NOTE: this property must be reset manually, and is not reset by a call to destroy().
- */
- void setPixelPacking(const bool pixelPacking) { _pixelPacking = pixelPacking; }
-private:
-
- Header _header;
- Surface *_surface;
- byte *_palette;
- Common::Array<PaletteRange> _paletteRanges;
- Type _type;
- uint16 _paletteColorCount;
- uint8 _numRelevantPlanes;
- bool _pixelPacking;
-
- void loadHeader(Common::SeekableReadStream &stream);
- void loadPalette(Common::SeekableReadStream &stream, const uint32 size);
- void loadPaletteRange(Common::SeekableReadStream &stream, const uint32 size);
- void loadBitmap(Common::SeekableReadStream &stream);
- void packPixels(byte *scanlines, byte *data, const uint16 scanlinePitch, const uint16 outPitch);
-};
-
-} // End of namespace Graphics
-
-#endif // GRAPHICS_DECODERS_IFF_H