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This is the verbatim text of the qimage.h include file. It is provided only for illustration; the copyright remains with Trolltech.
/****************************************************************************
** $Id: qt/qimage.h 3.3.8 edited Jan 11 14:38 $
**
** Definition of QImage and QImageIO classes
**
** Created : 950207
**
** Copyright (C) 1992-2007 Trolltech ASA. All rights reserved.
**
** This file is part of the kernel module of the Qt GUI Toolkit.
**
** This file may be distributed under the terms of the Q Public License
** as defined by Trolltech ASA of Norway and appearing in the file
** LICENSE.QPL included in the packaging of this file.
**
** This file may be distributed and/or modified under the terms of the
** GNU General Public License version 2 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.
**
** Licensees holding valid Qt Enterprise Edition or Qt Professional Edition
** licenses may use this file in accordance with the Qt Commercial License
** Agreement provided with the Software.
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
** See http://www.trolltech.com/pricing.html or email [email protected] for
** information about Qt Commercial License Agreements.
** See http://www.trolltech.com/qpl/ for QPL licensing information.
** See http://www.trolltech.com/gpl/ for GPL licensing information.
**
** Contact [email protected] if any conditions of this licensing are
** not clear to you.
**
**********************************************************************/
#ifndef QIMAGE_H
#define QIMAGE_H
#ifndef QT_H
#include "qpixmap.h"
#include "qstrlist.h"
#include "qstringlist.h"
#endif // QT_H
class QImageDataMisc; // internal
#ifndef QT_NO_IMAGE_TEXT
class Q_EXPORT QImageTextKeyLang {
public:
QImageTextKeyLang(const char* k, const char* l) : key(k), lang(l) { }
QImageTextKeyLang() { }
QCString key;
QCString lang;
bool operator< (const QImageTextKeyLang& other) const
{ return key < other.key || key==other.key && lang < other.lang; }
bool operator== (const QImageTextKeyLang& other) const
{ return key==other.key && lang==other.lang; }
};
#endif //QT_NO_IMAGE_TEXT
class Q_EXPORT QImage
{
public:
enum Endian { IgnoreEndian, BigEndian, LittleEndian };
QImage();
QImage( int width, int height, int depth, int numColors=0,
Endian bitOrder=IgnoreEndian );
QImage( const QSize&, int depth, int numColors=0,
Endian bitOrder=IgnoreEndian );
#ifndef QT_NO_IMAGEIO
QImage( const QString &fileName, const char* format=0 );
QImage( const char * const xpm[] );
QImage( const QByteArray &data );
#endif
QImage( uchar* data, int w, int h, int depth,
QRgb* colortable, int numColors,
Endian bitOrder );
#ifdef Q_WS_QWS
QImage( uchar* data, int w, int h, int depth, int pbl,
QRgb* colortable, int numColors,
Endian bitOrder );
#endif
QImage( const QImage & );
~QImage();
QImage &operator=( const QImage & );
QImage &operator=( const QPixmap & );
bool operator==( const QImage & ) const;
bool operator!=( const QImage & ) const;
void detach();
QImage copy() const;
QImage copy(int x, int y, int w, int h, int conversion_flags=0) const;
QImage copy(const QRect&) const;
#ifndef QT_NO_MIME
static QImage fromMimeSource( const QString& abs_name );
#endif
bool isNull() const { return data->bits == 0; }
int width() const { return data->w; }
int height() const { return data->h; }
QSize size() const { return QSize(data->w,data->h); }
QRect rect() const { return QRect(0,0,data->w,data->h); }
int depth() const { return data->d; }
int numColors() const { return data->ncols; }
Endian bitOrder() const { return (Endian) data->bitordr; }
QRgb color( int i ) const;
void setColor( int i, QRgb c );
void setNumColors( int );
bool hasAlphaBuffer() const;
void setAlphaBuffer( bool );
bool allGray() const;
bool isGrayscale() const;
uchar *bits() const;
uchar *scanLine( int ) const;
uchar **jumpTable() const;
QRgb *colorTable() const;
int numBytes() const;
int bytesPerLine() const;
#ifdef Q_WS_QWS
QGfx * graphicsContext();
#endif
bool create( int width, int height, int depth, int numColors=0,
Endian bitOrder=IgnoreEndian );
bool create( const QSize&, int depth, int numColors=0,
Endian bitOrder=IgnoreEndian );
void reset();
void fill( uint pixel );
void invertPixels( bool invertAlpha = TRUE );
QImage convertDepth( int ) const;
#ifndef QT_NO_IMAGE_TRUECOLOR
QImage convertDepthWithPalette( int, QRgb* p, int pc, int cf=0 ) const;
#endif
QImage convertDepth( int, int conversion_flags ) const;
QImage convertBitOrder( Endian ) const;
enum ScaleMode {
ScaleFree,
ScaleMin,
ScaleMax
};
#ifndef QT_NO_IMAGE_SMOOTHSCALE
QImage smoothScale( int w, int h, ScaleMode mode=ScaleFree ) const;
QImage smoothScale( const QSize& s, ScaleMode mode=ScaleFree ) const;
#endif
#ifndef QT_NO_IMAGE_TRANSFORMATION
QImage scale( int w, int h, ScaleMode mode=ScaleFree ) const;
QImage scale( const QSize& s, ScaleMode mode=ScaleFree ) const;
QImage scaleWidth( int w ) const;
QImage scaleHeight( int h ) const;
QImage xForm( const QWMatrix &matrix ) const;
#endif
#ifndef QT_NO_IMAGE_DITHER_TO_1
QImage createAlphaMask( int conversion_flags=0 ) const;
#endif
#ifndef QT_NO_IMAGE_HEURISTIC_MASK
QImage createHeuristicMask( bool clipTight=TRUE ) const;
#endif
#ifndef QT_NO_IMAGE_MIRROR
QImage mirror() const;
QImage mirror(bool horizontally, bool vertically) const;
#endif
QImage swapRGB() const;
static Endian systemBitOrder();
static Endian systemByteOrder();
#ifndef QT_NO_IMAGEIO
static const char* imageFormat( const QString &fileName );
static QStrList inputFormats();
static QStrList outputFormats();
#ifndef QT_NO_STRINGLIST
static QStringList inputFormatList();
static QStringList outputFormatList();
#endif
bool load( const QString &fileName, const char* format=0 );
bool loadFromData( const uchar *buf, uint len,
const char *format=0 );
bool loadFromData( QByteArray data, const char* format=0 );
bool save( const QString &fileName, const char* format,
int quality=-1 ) const;
bool save( QIODevice * device, const char* format,
int quality=-1 ) const;
#endif //QT_NO_IMAGEIO
bool valid( int x, int y ) const;
int pixelIndex( int x, int y ) const;
QRgb pixel( int x, int y ) const;
void setPixel( int x, int y, uint index_or_rgb );
// Auxiliary data
int dotsPerMeterX() const;
int dotsPerMeterY() const;
void setDotsPerMeterX(int);
void setDotsPerMeterY(int);
QPoint offset() const;
void setOffset(const QPoint&);
#ifndef QT_NO_IMAGE_TEXT
QValueList<QImageTextKeyLang> textList() const;
QStringList textLanguages() const;
QStringList textKeys() const;
QString text(const char* key, const char* lang=0) const;
QString text(const QImageTextKeyLang&) const;
void setText(const char* key, const char* lang, const QString&);
#endif
private:
void init();
void reinit();
void freeBits();
static void warningIndexRange( const char *, int );
struct QImageData : public QShared { // internal image data
int w; // image width
int h; // image height
int d; // image depth
int ncols; // number of colors
int nbytes; // number of bytes data
int bitordr; // bit order (1 bit depth)
QRgb *ctbl; // color table
uchar **bits; // image data
bool alpha; // alpha buffer
int dpmx; // dots per meter X (or 0)
int dpmy; // dots per meter Y (or 0)
QPoint offset; // offset in pixels
#ifndef QT_NO_IMAGE_TEXT
QImageDataMisc* misc; // less common stuff
#endif
bool ctbl_mine; // this allocated ctbl
} *data;
#ifndef QT_NO_IMAGE_TEXT
QImageDataMisc& misc() const;
#endif
#ifndef QT_NO_IMAGEIO
bool doImageIO( QImageIO* io, int quality ) const;
#endif
friend Q_EXPORT void bitBlt( QImage* dst, int dx, int dy,
const QImage* src, int sx, int sy,
int sw, int sh, int conversion_flags );
};
// QImage stream functions
#if !defined(QT_NO_DATASTREAM) && !defined(QT_NO_IMAGEIO)
Q_EXPORT QDataStream &operator<<( QDataStream &, const QImage & );
Q_EXPORT QDataStream &operator>>( QDataStream &, QImage & );
#endif
#ifndef QT_NO_IMAGEIO
class QIODevice;
typedef void (*image_io_handler)( QImageIO * ); // image IO handler
struct QImageIOData;
class Q_EXPORT QImageIO
{
public:
QImageIO();
QImageIO( QIODevice *ioDevice, const char *format );
QImageIO( const QString &fileName, const char* format );
~QImageIO();
const QImage &image() const { return im; }
int status() const { return iostat; }
const char *format() const { return frmt; }
QIODevice *ioDevice() const { return iodev; }
QString fileName() const { return fname; }
int quality() const;
QString description() const { return descr; }
const char *parameters() const;
float gamma() const;
void setImage( const QImage & );
void setStatus( int );
void setFormat( const char * );
void setIODevice( QIODevice * );
void setFileName( const QString & );
void setQuality( int );
void setDescription( const QString & );
void setParameters( const char * );
void setGamma( float );
bool read();
bool write();
static const char* imageFormat( const QString &fileName );
static const char *imageFormat( QIODevice * );
static QStrList inputFormats();
static QStrList outputFormats();
static void defineIOHandler( const char *format,
const char *header,
const char *flags,
image_io_handler read_image,
image_io_handler write_image );
private:
void init();
QImage im; // image
int iostat; // IO status
QCString frmt; // image format
QIODevice *iodev; // IO device
QString fname; // file name
char *params; // image parameters //### change to QImageIOData *d in 3.0
QString descr; // image description
QImageIOData *d;
private: // Disabled copy constructor and operator=
#if defined(Q_DISABLE_COPY)
QImageIO( const QImageIO & );
QImageIO &operator=( const QImageIO & );
#endif
};
#endif //QT_NO_IMAGEIO
Q_EXPORT void bitBlt( QImage* dst, int dx, int dy, const QImage* src,
int sx=0, int sy=0, int sw=-1, int sh=-1,
int conversion_flags=0 );
/*****************************************************************************
QImage member functions
*****************************************************************************/
inline bool QImage::hasAlphaBuffer() const
{
return data->alpha;
}
inline uchar *QImage::bits() const
{
return data->bits ? data->bits[0] : 0;
}
inline uchar **QImage::jumpTable() const
{
return data->bits;
}
inline QRgb *QImage::colorTable() const
{
return data->ctbl;
}
inline int QImage::numBytes() const
{
return data->nbytes;
}
inline int QImage::bytesPerLine() const
{
return data->h ? data->nbytes/data->h : 0;
}
inline QImage QImage::copy(const QRect& r) const
{
return copy(r.x(), r.y(), r.width(), r.height());
}
inline QRgb QImage::color( int i ) const
{
#if defined(QT_CHECK_RANGE)
if ( i >= data->ncols )
warningIndexRange( "color", i );
#endif
return data->ctbl ? data->ctbl[i] : (QRgb)-1;
}
inline void QImage::setColor( int i, QRgb c )
{
#if defined(QT_CHECK_RANGE)
if ( i >= data->ncols )
warningIndexRange( "setColor", i );
#endif
if ( data->ctbl )
data->ctbl[i] = c;
}
inline uchar *QImage::scanLine( int i ) const
{
#if defined(QT_CHECK_RANGE)
if ( i >= data->h )
warningIndexRange( "scanLine", i );
#endif
return data->bits ? data->bits[i] : 0;
}
inline int QImage::dotsPerMeterX() const
{
return data->dpmx;
}
inline int QImage::dotsPerMeterY() const
{
return data->dpmy;
}
inline QPoint QImage::offset() const
{
return data->offset;
}
#endif // QIMAGE_H
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