mirror of
https://github.com/libretro/scummvm.git
synced 2024-12-21 09:21:08 +00:00
127 lines
3.8 KiB
C++
127 lines
3.8 KiB
C++
/* 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 IMAGE_IFF_H
|
|
#define IMAGE_IFF_H
|
|
|
|
#include "common/array.h"
|
|
#include "common/endian.h"
|
|
#include "graphics/surface.h"
|
|
|
|
#include "image/image_decoder.h"
|
|
|
|
namespace Common {
|
|
class SeekableReadStream;
|
|
}
|
|
|
|
namespace Graphics {
|
|
struct Surface;
|
|
}
|
|
|
|
namespace Image {
|
|
|
|
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 Graphics::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;
|
|
Graphics::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 Image
|
|
|
|
#endif
|