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src/qt/src/kernel/qimage.h
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00001 /****************************************************************************
00002 ** $Id: qt/qimage.h   3.3.8   edited Jan 11 14:38 $
00003 **
00004 ** Definition of QImage and QImageIO classes
00005 **
00006 ** Created : 950207
00007 **
00008 ** Copyright (C) 1992-2007 Trolltech ASA.  All rights reserved.
00009 **
00010 ** This file is part of the kernel module of the Qt GUI Toolkit.
00011 **
00012 ** This file may be distributed under the terms of the Q Public License
00013 ** as defined by Trolltech ASA of Norway and appearing in the file
00014 ** LICENSE.QPL included in the packaging of this file.
00015 **
00016 ** This file may be distributed and/or modified under the terms of the
00017 ** GNU General Public License version 2 as published by the Free Software
00018 ** Foundation and appearing in the file LICENSE.GPL included in the
00019 ** packaging of this file.
00020 **
00021 ** Licensees holding valid Qt Enterprise Edition or Qt Professional Edition
00022 ** licenses may use this file in accordance with the Qt Commercial License
00023 ** Agreement provided with the Software.
00024 **
00025 ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
00026 ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
00027 **
00028 ** See http://www.trolltech.com/pricing.html or email sales@trolltech.com for
00029 **   information about Qt Commercial License Agreements.
00030 ** See http://www.trolltech.com/qpl/ for QPL licensing information.
00031 ** See http://www.trolltech.com/gpl/ for GPL licensing information.
00032 **
00033 ** Contact info@trolltech.com if any conditions of this licensing are
00034 ** not clear to you.
00035 **
00036 **********************************************************************/
00037 
00038 #ifndef QIMAGE_H
00039 #define QIMAGE_H
00040 
00041 #ifndef QT_H
00042 #include "qpixmap.h"
00043 #include "qstrlist.h"
00044 #include "qstringlist.h"
00045 #endif // QT_H
00046 
00047 class QImageDataMisc; // internal
00048 #ifndef QT_NO_IMAGE_TEXT
00049 class Q_EXPORT QImageTextKeyLang {
00050 public:
00051     QImageTextKeyLang(const char* k, const char* l) : key(k), lang(l) { }
00052     QImageTextKeyLang() { }
00053 
00054     QCString key;
00055     QCString lang;
00056 
00057     bool operator< (const QImageTextKeyLang& other) const
00058         { return key < other.key || (key==other.key && lang < other.lang); }
00059     bool operator== (const QImageTextKeyLang& other) const
00060         { return key==other.key && lang==other.lang; }
00061 };
00062 #endif //QT_NO_IMAGE_TEXT
00063 
00064 
00065 class Q_EXPORT QImage
00066 {
00067 public:
00068     enum Endian { IgnoreEndian, BigEndian, LittleEndian };
00069 
00070     QImage();
00071     QImage( int width, int height, int depth, int numColors=0,
00072             Endian bitOrder=IgnoreEndian );
00073     QImage( const QSize&, int depth, int numColors=0,
00074             Endian bitOrder=IgnoreEndian );
00075 #ifndef QT_NO_IMAGEIO
00076     QImage( const QString &fileName, const char* format=0 );
00077     QImage( const char * const xpm[] );
00078     QImage( const QByteArray &data );
00079 #endif
00080     QImage( uchar* data, int w, int h, int depth,
00081                 QRgb* colortable, int numColors,
00082                 Endian bitOrder );
00083 #ifdef Q_WS_QWS
00084     QImage( uchar* data, int w, int h, int depth, int pbl,
00085                 QRgb* colortable, int numColors,
00086                 Endian bitOrder );
00087 #endif
00088     QImage( const QImage & );
00089    ~QImage();
00090 
00091     QImage     &operator=( const QImage & );
00092     QImage     &operator=( const QPixmap & );
00093     bool        operator==( const QImage & ) const;
00094     bool        operator!=( const QImage & ) const;
00095     void        detach();
00096     QImage      copy()          const;
00097     QImage      copy(int x, int y, int w, int h, int conversion_flags=0) const;
00098     QImage      copy(const QRect&)      const;
00099 #ifndef QT_NO_MIME
00100     static QImage fromMimeSource( const QString& abs_name );
00101 #endif
00102     bool        isNull()        const   { return data->bits == 0; }
00103 
00104     int         width()         const   { return data->w; }
00105     int         height()        const   { return data->h; }
00106     QSize       size()          const   { return QSize(data->w,data->h); }
00107     QRect       rect()          const   { return QRect(0,0,data->w,data->h); }
00108     int         depth()         const   { return data->d; }
00109     int         numColors()     const   { return data->ncols; }
00110     Endian      bitOrder()      const   { return (Endian) data->bitordr; }
00111 
00112     QRgb        color( int i )  const;
00113     void        setColor( int i, QRgb c );
00114     void        setNumColors( int );
00115 
00116     bool        hasAlphaBuffer() const;
00117     void        setAlphaBuffer( bool );
00118 
00119     bool        allGray() const;
00120     bool        isGrayscale() const;
00121 
00122     uchar      *bits()          const;
00123     uchar      *scanLine( int ) const;
00124     uchar     **jumpTable()     const;
00125     QRgb       *colorTable()    const;
00126     int         numBytes()      const;
00127     int         bytesPerLine()  const;
00128 
00129 #ifdef Q_WS_QWS
00130     QGfx * graphicsContext();
00131 #endif
00132 
00133     bool        create( int width, int height, int depth, int numColors=0,
00134                         Endian bitOrder=IgnoreEndian );
00135     bool        create( const QSize&, int depth, int numColors=0,
00136                         Endian bitOrder=IgnoreEndian );
00137     void        reset();
00138 
00139     void        fill( uint pixel );
00140     void        invertPixels( bool invertAlpha = TRUE );
00141 
00142     QImage      convertDepth( int ) const;
00143 #ifndef QT_NO_IMAGE_TRUECOLOR
00144     QImage      convertDepthWithPalette( int, QRgb* p, int pc, int cf=0 ) const;
00145 #endif
00146     QImage      convertDepth( int, int conversion_flags ) const;
00147     QImage      convertBitOrder( Endian ) const;
00148 
00149     enum ScaleMode {
00150         ScaleFree,
00151         ScaleMin,
00152         ScaleMax
00153     };
00154 #ifndef QT_NO_IMAGE_SMOOTHSCALE
00155     QImage smoothScale( int w, int h, ScaleMode mode=ScaleFree ) const;
00156     QImage smoothScale( const QSize& s, ScaleMode mode=ScaleFree ) const;
00157 #endif
00158 #ifndef QT_NO_IMAGE_TRANSFORMATION
00159     QImage scale( int w, int h, ScaleMode mode=ScaleFree ) const;
00160     QImage scale( const QSize& s, ScaleMode mode=ScaleFree ) const;
00161     QImage scaleWidth( int w ) const;
00162     QImage scaleHeight( int h ) const;
00163     QImage xForm( const QWMatrix &matrix ) const;
00164 #endif
00165 
00166 #ifndef QT_NO_IMAGE_DITHER_TO_1
00167     QImage      createAlphaMask( int conversion_flags=0 ) const;
00168 #endif
00169 #ifndef QT_NO_IMAGE_HEURISTIC_MASK
00170     QImage      createHeuristicMask( bool clipTight=TRUE ) const;
00171 #endif
00172 #ifndef QT_NO_IMAGE_MIRROR
00173     QImage      mirror() const;
00174     QImage      mirror(bool horizontally, bool vertically) const;
00175 #endif
00176     QImage      swapRGB() const;
00177 
00178     static Endian systemBitOrder();
00179     static Endian systemByteOrder();
00180 
00181 #ifndef QT_NO_IMAGEIO
00182     static const char* imageFormat( const QString &fileName );
00183     static QStrList inputFormats();
00184     static QStrList outputFormats();
00185 #ifndef QT_NO_STRINGLIST
00186     static QStringList inputFormatList();
00187     static QStringList outputFormatList();
00188 #endif
00189     bool        load( const QString &fileName, const char* format=0 );
00190     bool        loadFromData( const uchar *buf, uint len,
00191                               const char *format=0 );
00192     bool        loadFromData( QByteArray data, const char* format=0 );
00193     bool        save( const QString &fileName, const char* format,
00194                       int quality=-1 ) const;
00195     bool        save( QIODevice * device, const char* format,
00196                       int quality=-1 ) const;
00197 #endif //QT_NO_IMAGEIO
00198 
00199     bool        valid( int x, int y ) const;
00200     int         pixelIndex( int x, int y ) const;
00201     QRgb        pixel( int x, int y ) const;
00202     void        setPixel( int x, int y, uint index_or_rgb );
00203 
00204     // Auxiliary data
00205     int dotsPerMeterX() const;
00206     int dotsPerMeterY() const;
00207     void setDotsPerMeterX(int);
00208     void setDotsPerMeterY(int);
00209     QPoint offset() const;
00210     void setOffset(const QPoint&);
00211 #ifndef QT_NO_IMAGE_TEXT
00212     QValueList<QImageTextKeyLang> textList() const;
00213     QStringList textLanguages() const;
00214     QStringList textKeys() const;
00215     QString text(const char* key, const char* lang=0) const;
00216     QString text(const QImageTextKeyLang&) const;
00217     void setText(const char* key, const char* lang, const QString&);
00218 #endif
00219 private:
00220     void        init();
00221     void        reinit();
00222     void        freeBits();
00223     static void warningIndexRange( const char *, int );
00224 
00225     struct QImageData : public QShared {        // internal image data
00226         int     w;                              // image width
00227         int     h;                              // image height
00228         int     d;                              // image depth
00229         int     ncols;                          // number of colors
00230         int     nbytes;                         // number of bytes data
00231         int     bitordr;                        // bit order (1 bit depth)
00232         QRgb   *ctbl;                           // color table
00233         uchar **bits;                           // image data
00234         bool    alpha;                          // alpha buffer
00235         int     dpmx;                           // dots per meter X (or 0)
00236         int     dpmy;                           // dots per meter Y (or 0)
00237         QPoint  offset;                         // offset in pixels
00238 #ifndef QT_NO_IMAGE_TEXT
00239         QImageDataMisc* misc;                   // less common stuff
00240 #endif
00241         bool    ctbl_mine;                      // this allocated ctbl
00242     } *data;
00243 #ifndef QT_NO_IMAGE_TEXT
00244     QImageDataMisc& misc() const;
00245 #endif
00246 #ifndef QT_NO_IMAGEIO
00247     bool doImageIO( QImageIO* io, int quality ) const;
00248 #endif
00249     friend Q_EXPORT void bitBlt( QImage* dst, int dx, int dy,
00250                                  const QImage* src, int sx, int sy,
00251                                  int sw, int sh, int conversion_flags );
00252 };
00253 
00254 
00255 // QImage stream functions
00256 
00257 #if !defined(QT_NO_DATASTREAM) && !defined(QT_NO_IMAGEIO)
00258 Q_EXPORT QDataStream &operator<<( QDataStream &, const QImage & );
00259 Q_EXPORT QDataStream &operator>>( QDataStream &, QImage & );
00260 #endif
00261 
00262 #ifndef QT_NO_IMAGEIO
00263 class QIODevice;
00264 typedef void (*image_io_handler)( QImageIO * ); // image IO handler
00265 
00266 
00267 struct QImageIOData;
00268 
00269 
00270 class Q_EXPORT QImageIO
00271 {
00272 public:
00273     QImageIO();
00274     QImageIO( QIODevice  *ioDevice, const char *format );
00275     QImageIO( const QString &fileName, const char* format );
00276    ~QImageIO();
00277 
00278 
00279     const QImage &image()       const   { return im; }
00280     int         status()        const   { return iostat; }
00281     const char *format()        const   { return frmt; }
00282     QIODevice  *ioDevice()      const   { return iodev; }
00283     QString     fileName()      const   { return fname; }
00284     int         quality()       const;
00285     QString     description()   const   { return descr; }
00286     const char *parameters()    const;
00287     float gamma() const;
00288 
00289     void        setImage( const QImage & );
00290     void        setStatus( int );
00291     void        setFormat( const char * );
00292     void        setIODevice( QIODevice * );
00293     void        setFileName( const QString & );
00294     void        setQuality( int );
00295     void        setDescription( const QString & );
00296     void        setParameters( const char * );
00297     void        setGamma( float );
00298 
00299     bool        read();
00300     bool        write();
00301 
00302     static const char* imageFormat( const QString &fileName );
00303     static const char *imageFormat( QIODevice * );
00304     static QStrList inputFormats();
00305     static QStrList outputFormats();
00306 
00307     static void defineIOHandler( const char *format,
00308                                  const char *header,
00309                                  const char *flags,
00310                                  image_io_handler read_image,
00311                                  image_io_handler write_image );
00312 
00313 private:
00314     void        init();
00315 
00316     QImage      im;                             // image
00317     int         iostat;                         // IO status
00318     QCString    frmt;                           // image format
00319     QIODevice  *iodev;                          // IO device
00320     QString     fname;                          // file name
00321     char       *params;                         // image parameters //### change to QImageIOData *d in 3.0
00322     QString     descr;                          // image description
00323     QImageIOData *d;
00324 
00325 private:        // Disabled copy constructor and operator=
00326 #if defined(Q_DISABLE_COPY)
00327     QImageIO( const QImageIO & );
00328     QImageIO &operator=( const QImageIO & );
00329 #endif
00330 };
00331 
00332 #endif //QT_NO_IMAGEIO
00333 
00334 Q_EXPORT void bitBlt( QImage* dst, int dx, int dy, const QImage* src,
00335                       int sx=0, int sy=0, int sw=-1, int sh=-1,
00336                       int conversion_flags=0 );
00337 
00338 
00339 /*****************************************************************************
00340   QImage member functions
00341  *****************************************************************************/
00342 
00343 inline bool QImage::hasAlphaBuffer() const
00344 {
00345     return data->alpha;
00346 }
00347 
00348 inline uchar *QImage::bits() const
00349 {
00350     return data->bits ? data->bits[0] : 0;
00351 }
00352 
00353 inline uchar **QImage::jumpTable() const
00354 {
00355     return data->bits;
00356 }
00357 
00358 inline QRgb *QImage::colorTable() const
00359 {
00360     return data->ctbl;
00361 }
00362 
00363 inline int QImage::numBytes() const
00364 {
00365     return data->nbytes;
00366 }
00367 
00368 inline int QImage::bytesPerLine() const
00369 {
00370     return data->h ? data->nbytes/data->h : 0;
00371 }
00372 
00373 inline QImage QImage::copy(const QRect& r) const
00374 {
00375     return copy(r.x(), r.y(), r.width(), r.height());
00376 }
00377 
00378 inline QRgb QImage::color( int i ) const
00379 {
00380 #if defined(QT_CHECK_RANGE)
00381     if ( i >= data->ncols )
00382         warningIndexRange( "color", i );
00383 #endif
00384     return data->ctbl ? data->ctbl[i] : (QRgb)-1;
00385 }
00386 
00387 inline void QImage::setColor( int i, QRgb c )
00388 {
00389 #if defined(QT_CHECK_RANGE)
00390     if ( i >= data->ncols )
00391         warningIndexRange( "setColor", i );
00392 #endif
00393     if ( data->ctbl )
00394         data->ctbl[i] = c;
00395 }
00396 
00397 inline uchar *QImage::scanLine( int i ) const
00398 {
00399 #if defined(QT_CHECK_RANGE)
00400     if ( i >= data->h )
00401         warningIndexRange( "scanLine", i );
00402 #endif
00403     return data->bits ? data->bits[i] : 0;
00404 }
00405 
00406 inline int QImage::dotsPerMeterX() const
00407 {
00408     return data->dpmx;
00409 }
00410 
00411 inline int QImage::dotsPerMeterY() const
00412 {
00413     return data->dpmy;
00414 }
00415 
00416 inline QPoint QImage::offset() const
00417 {
00418     return data->offset;
00419 }
00420 
00421 
00422 #endif // QIMAGE_H
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