QBitmap - Monochrome (1 bit depth) pixmaps

       #include <qbitmap.h>

       Inherits QPixmap.

   Public Members
       QBitmap ()
       QBitmap ( int w, int h, bool clear = FALSE,
           QPixmap::Optimization = QPixmap::DefaultOptim )
       QBitmap ( const QSize &, bool clear = FALSE,
           QPixmap::Optimization = QPixmap::DefaultOptim )
       QBitmap ( int w, int h, const uchar * bits, bool
           isXbitmap=FALSE )
       QBitmap ( const QSize &, const uchar * bits, bool
           isXbitmap=FALSE )
       QBitmap ( const QBitmap & )
       QBitmap ( const QString & fileName, const char * format=0
           )
       QBitmap& operator= ( const QBitmap & )
       QBitmap& operator= ( const QPixmap & )
       QBitmap& operator= ( const QImage & )
       QBitmap xForm ( const QWMatrix & ) const


DESCRIPTION

       The QBitmap class provides monochrome (1 bit depth)
       pixmaps.

       The QBitmap class is a monochrome off-screen paint device,
       used mainly for creating custom QCursor and QBrush
       objects, in QPixmap::setMask() and for QRegion.

       A QBitmap is a QPixmap with a QPixmap::depth() of 1. If a
       pixmap with a depth greater than 1 is assigned to a
       bitmap, the bitmap will be automatically dithered. A
       QBitmap is guaranteed to always have the depth 1, unless
       it is QPixmap::isNull() (has depth 0).

       When drawing in a QBitmap (or QPixmap with depth 1), we
       recommend using the QColor objects Qt::color0 and
       Qt::color1. Painting with color0 sets the bitmap bits to
       0, and painting with color1 sets the bits to 1. For a
       bitmap, 0-bits indicate background (or white) and 1-bits
       indicate foreground (or black). Using the black and white
       QColor objects make no sense, because the QColor::pixel()
       value is not necessarily 0 for black and 1 for white.

       Just like the QPixmap class, QBitmap is optimized by the
       use of implicit sharing, so it is very efficient to pass
       QBitmap objects as arguments.

       See also QPixmap, QPainter::drawPixmap(), bitBlt() and


       Examples: cursor/cursor.cpp


MEMBER FUNCTION DOCUMENTATION


QBitmap::QBitmap ()

       Constructs a null bitmap.

       See also QPixmap::isNull().


QBitmap::QBitmap ( const QString & fileName, const char *

       format=0 )
       Constructs a pixmap from the file fileName. If the file
       does not exist, or is of an unknown format, the pixmap
       becomes a null pixmap.

       The parameters are passed on to QPixmap::load(). Dithering
       will be performed if the file format uses more than 1 bit
       per pixel.

       See also QPixmap::isNull(), QPixmap::load(),
       QPixmap::loadFromData(), QPixmap::save() and
       QPixmap::imageFormat().


QBitmap::QBitmap ( const QBitmap & bitmap )

       Constructs a bitmap which is a copy of bitmap.


QBitmap::QBitmap ( int w, int h, bool clear = FALSE,

       QPixmap::Optimization optimization = QPixmap::DefaultOptim
       )
       Constructs a bitmap with w width and h height.

       The contents of the bitmap is uninitialized if clear is
       FALSE, otherwise it is filled with pixel value 0 (the
       QColor Qt::color0).

       The optional optimization argument specifies the
       optimization setting for the bitmap. The default
       optimization should be used in most cases. Games and other
       pixmap-intensive applications may benefit from setting
       this argument.

       See also QPixmap::setOptimization() and
       QPixmap::setDefaultOptimization().


QBitmap::QBitmap ( int w, int h, const uchar * bits, bool

       isXbitmap=FALSE )
       Constructs a bitmap with w width and h height and sets the
       contents to bits.

       The isXbitmap should be TRUE if bits was generated by the
       X11 bitmap program. The X bitmap bit order is little
       endian. The QImage documentation discusses bit order of
       monochrome images.


           uchar arrow_bits[] = { 0x3f, 0x1f, 0x0f, 0x1f, 0x3b, 0x71, 0xe0, 0xc0 };
           QBitmap bm( 8, 8, arrow_bits, TRUE );


QBitmap::QBitmap ( const QSize & size, bool clear = FALSE,

       QPixmap::Optimization optimization = QPixmap::DefaultOptim
       )
       This is an overloaded member function, provided for
       convenience. It differs from the above function only in
       what argument(s) it accepts.


QBitmap::QBitmap ( const QSize & size, const uchar * bits, bool

       isXbitmap=FALSE )
       This is an overloaded member function, provided for
       convenience. It differs from the above function only in
       what argument(s) it accepts.


QBitmap & QBitmap::operator= ( const QImage & image )

       Converts the image image to a bitmap and assigns the
       result to this bitmap. Returns a reference to the bitmap.

       Dithering will be performed if the image has a
       QImage::depth() greater than 1.


QBitmap & QBitmap::operator= ( const QPixmap & pixmap )

       Assigns the pixmap pixmap to this bitmap and returns a
       reference to this bitmap.

       Dithering will be performed if the pixmap has a
       QPixmap::depth() greater than 1.


QBitmap & QBitmap::operator= ( const QBitmap & bitmap )

       Assigns the bitmap bitmap to this bitmap and returns a
       reference to this bitmap.


QBitmap QBitmap::xForm ( const QWMatrix & matrix ) const

       Returns a transformed copy of this bitmap, using matrix.

       This function does exactly the same as QPixmap::xForm(),
       except that it returns a QBitmap instead of a QPixmap.

       See also  QPixmap::xForm().


SEE ALSO

       http://doc.trolltech.com/qbitmap.html
       http://www.trolltech.com/faq/tech.html


COPYRIGHT

       Copyright 1992-2001 Trolltech AS,
       http://www.trolltech.com.  See the license file included
       in the distribution for a complete license statement.

       Generated automatically from the source code.


BUGS

       If you find a bug in Qt, please report it as described in
       http://doc.trolltech.com/bughowto.html.  Good bug reports
       make our job much simpler. Thank you.

       In case of content or formattting problems with this
       manual page, please report them to qt-bugs@trolltech.com.
       Please include the name of the manual page (qbitmap.3qt)
       and the Qt version (2.3.1).


Man(1) output converted with man2html