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QBitmap(3qt)							  QBitmap(3qt)

NAME
       QBitmap - Monochrome (1-bit depth) pixmaps

SYNOPSIS
       #include <qbitmap.h>

       Inherits QPixmap.

   Public Members
       QBitmap ()
       QBitmap ( int w, int h, bool clear = FALSE, QPixmap::Optimization
	   optimization = QPixmap::DefaultOptim )
       QBitmap ( const QSize & size, bool clear = FALSE, QPixmap::Optimization
	   optimization = QPixmap::DefaultOptim )
       QBitmap ( int w, int h, const uchar * bits, bool isXbitmap = FALSE )
       QBitmap ( const QSize & size, const uchar * bits, bool isXbitmap =
	   FALSE )
       QBitmap ( const QBitmap & bitmap )
       QBitmap ( const QString & fileName, const char * format = 0 )
       QBitmap & operator= ( const QBitmap & bitmap )
       QBitmap & operator= ( const QPixmap & pixmap )
       QBitmap & operator= ( const QImage & image )
       QBitmap xForm ( const QWMatrix & matrix ) 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 depth of 1. If a pixmap with a depth
       greater than 1 is assigned to a bitmap, the bitmap will be dithered
       automatically. A QBitmap is guaranteed to always have the depth 1,
       unless it is QPixmap::isNull() which 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 transparent) and 1-bits
       indicate foreground (or opaque). 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.

       The QBitmap can be transformed (translated, scaled, sheared or rotated)
       using xForm().

       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(), Shared Classes,
       Graphics Classes, Image Processing Classes, and Implicitly and
       Explicitly Shared Classes.

MEMBER FUNCTION DOCUMENTATION
QBitmap::QBitmap ()
       Constructs a null bitmap.

       See also QPixmap::isNull().

QBitmap::QBitmap ( int w, int h, bool clear = FALSE, QPixmap::Optimization
       optimization = QPixmap::DefaultOptim )
       Constructs a bitmap with width w and height h.

       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 QPixmap::Optimization.

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

QBitmap::QBitmap ( const QSize & size, bool clear = FALSE,
       QPixmap::Optimization optimization = QPixmap::DefaultOptim )
       This is an overloaded member function, provided for convenience. It
       behaves essentially like the above function.

       Constructs a bitmap with the size size.

       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 QPixmap::Optimization.

QBitmap::QBitmap ( int w, int h, const uchar * bits, bool isXbitmap = FALSE )
       Constructs a bitmap with width w and height h and sets the contents to
       bits.

       The isXbitmap flag 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.

       Example (creates an arrow bitmap):

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

QBitmap::QBitmap ( const QSize & size, const uchar * bits, bool isXbitmap =
       FALSE )
       This is an overloaded member function, provided for convenience. It
       behaves essentially like the above function.

       Constructs a bitmap with the size size and sets the contents to bits.

       The isXbitmap flag 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.

QBitmap::QBitmap ( const QBitmap & bitmap )
       Constructs a bitmap that is a copy of bitmap.

QBitmap::QBitmap ( const QString & fileName, const char * format = 0 )
       Constructs a bitmap from the file fileName. If the file does not exist
       or is of an unknown format, the bitmap becomes a null bitmap.

       The parameters fileName and format 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::operator= ( const QBitmap & bitmap )
       Assigns the bitmap bitmap to this bitmap and returns a reference to
       this bitmap.

QBitmap & QBitmap::operator= ( const QPixmap & pixmap )
       This is an overloaded member function, provided for convenience. It
       behaves essentially like the above function.

       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 QImage & image )
       This is an overloaded member function, provided for convenience. It
       behaves essentially like the above function.

       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::xForm ( const QWMatrix & matrix ) const
       Returns a transformed copy of this bitmap by 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 1992-2007 Trolltech ASA, http://www.trolltech.com.  See the
       license file included in the distribution for a complete license
       statement.

AUTHOR
       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 help us to
       help you. Thank you.

       The definitive Qt documentation is provided in HTML format; it is
       located at $QTDIR/doc/html and can be read using Qt Assistant or with a
       web browser. This man page is provided as a convenience for those users
       who prefer man pages, although this format is not officially supported
       by Trolltech.

       If you find errors in 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 (3.3.8).

Trolltech AS			2 February 2007			  QBitmap(3qt)
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