KImgIO

rgb.h

00001 // kimgio module for SGI images
00002 //
00003 // Copyright (C) 2004  Melchior FRANZ  <mfranz@kde.org>
00004 //
00005 // This program is free software; you can redistribute it and/or
00006 // modify it under the terms of the Lesser GNU General Public License as
00007 // published by the Free Software Foundation; either version 2 of the
00008 // License, or (at your option) any later version.
00009 
00010 
00011 #ifndef KIMG_RGB_H
00012 #define KIMG_RGB_H
00013 
00014 #include <qmap.h>
00015 #include <qptrvector.h>
00016 
00017 
00018 class QImage;
00019 class QImageIO;
00020 
00021 extern "C" {
00022 void kimgio_rgb_read(QImageIO *);
00023 void kimgio_rgb_write(QImageIO *);
00024 }
00025 
00026 
00027 class RLEData : public QMemArray<uchar> {
00028 public:
00029     RLEData() {}
00030     RLEData(const uchar *d, uint l, uint o) : m_offset(o) { duplicate(d, l); }
00031     bool operator<(const RLEData&) const;
00032     void write(QDataStream& s);
00033     void print(QString) const;              // TODO remove
00034     uint offset() { return m_offset; }
00035 private:
00036     uint            m_offset;
00037 };
00038 
00039 
00040 class RLEMap : public QMap<RLEData, uint> {
00041 public:
00042     RLEMap() : m_counter(0), m_offset(0) {}
00043     uint insert(const uchar *d, uint l);
00044     QPtrVector<RLEData> vector();
00045     void setBaseOffset(uint o) { m_offset = o; }
00046 private:
00047     uint            m_counter;
00048     uint            m_offset;
00049 };
00050 
00051 
00052 class SGIImage {
00053 public:
00054     SGIImage(QImageIO *);
00055     ~SGIImage();
00056 
00057     bool readImage(QImage&);
00058     bool writeImage(QImage&);
00059 
00060 private:
00061     enum { NORMAL, DITHERED, SCREEN, COLORMAP };        // colormap
00062     QImageIO        *m_io;
00063     QIODevice       *m_dev;
00064     QDataStream     m_stream;
00065 
00066     Q_UINT8         m_rle;
00067     Q_UINT8         m_bpc;
00068     Q_UINT16        m_dim;
00069     Q_UINT16        m_xsize;
00070     Q_UINT16        m_ysize;
00071     Q_UINT16        m_zsize;
00072     Q_UINT32        m_pixmin;
00073     Q_UINT32        m_pixmax;
00074     char            m_imagename[80];
00075     Q_UINT32        m_colormap;
00076 
00077     Q_UINT32        *m_starttab;
00078     Q_UINT32        *m_lengthtab;
00079     QByteArray      m_data;
00080     QByteArray::Iterator    m_pos;
00081     RLEMap          m_rlemap;
00082     QPtrVector<RLEData> m_rlevector;
00083     uint            m_numrows;
00084 
00085     bool readData(QImage&);
00086     bool getRow(uchar *dest);
00087 
00088     void writeHeader();
00089     void writeRle();
00090     void writeVerbatim(const QImage&);
00091     bool scanData(const QImage&);
00092     uint compact(uchar *, uchar *);
00093     uchar intensity(uchar);
00094 };
00095 
00096 #endif
00097
KImgIO

rgb.h

KImgIO

API Reference
