rgb.h
// kimgio module for SGI images
//
// Copyright (C) 2004 Melchior FRANZ <mfranz@kde.org>
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the Lesser GNU General Public License as
// published by the Free Software Foundation; either version 2 of the
// License, or (at your option) any later version.
#ifndef KIMG_RGB_H
#define KIMG_RGB_H
#include <qmap.h>
#include <qptrvector.h>
class QImage;
class QImageIO;
extern "C" {
void kimgio_rgb_read(QImageIO *);
void kimgio_rgb_write(QImageIO *);
}
class RLEData : public QMemArray<uchar> {
public:
RLEData() {}
RLEData(const uchar *d, uint l, uint o) : m_offset(o) { duplicate(d, l); }
bool operator<(const RLEData&) const;
void write(QDataStream& s);
void print(QString) const; // TODO remove
uint offset() { return m_offset; }
private:
uint m_offset;
};
class RLEMap : public QMap<RLEData, uint> {
public:
RLEMap() : m_counter(0), m_offset(0) {}
uint insert(const uchar *d, uint l);
QPtrVector<RLEData> vector();
void setBaseOffset(uint o) { m_offset = o; }
private:
uint m_counter;
uint m_offset;
};
class SGIImage {
public:
SGIImage(QImageIO *);
~SGIImage();
bool readImage(QImage&);
bool writeImage(QImage&);
private:
enum { NORMAL, DITHERED, SCREEN, COLORMAP }; // colormap
QImageIO *m_io;
QIODevice *m_dev;
QDataStream m_stream;
Q_UINT8 m_rle;
Q_UINT8 m_bpc;
Q_UINT16 m_dim;
Q_UINT16 m_xsize;
Q_UINT16 m_ysize;
Q_UINT16 m_zsize;
Q_UINT32 m_pixmin;
Q_UINT32 m_pixmax;
char m_imagename[80];
Q_UINT32 m_colormap;
Q_UINT32 *m_starttab;
Q_UINT32 *m_lengthtab;
QByteArray m_data;
QByteArray::Iterator m_pos;
RLEMap m_rlemap;
QPtrVector<RLEData> m_rlevector;
uint m_numrows;
bool readData(QImage&);
bool getRow(uchar *dest);
void writeHeader();
void writeRle();
void writeVerbatim(const QImage&);
bool scanData(const QImage&);
uint compact(uchar *, uchar *);
uchar intensity(uchar);
};
#endif

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