QBitmap Class Reference

Member Function Documentation

QBitmap::QBitmap ()

Constructs a null bitmap.

See also QPixmap::isNull().

QBitmap::QBitmap ( const QPixmap & pixmap )

Constructs a bitmap that is a copy of the given pixmap.

If the pixmap has a depth greater than 1, the resulting bitmap will be dithered automatically.

See also QPixmap::depth(), fromImage(), and fromData().

QBitmap::QBitmap ( int width, int height )

Constructs a bitmap with the given width and height. The pixels inside are uninitialized.

See also clear().

QBitmap::QBitmap ( const QSize & size )

Constructs a bitmap with the given size. The pixels in the bitmap are uninitialized.

See also clear().

QBitmap::QBitmap ( const QString & fileName, const char * format = 0 )

Constructs a bitmap from the file specified by the given fileName. If the file does not exist, or has an unknown format, the bitmap becomes a null bitmap.

The fileName and format parameters are passed on to the QPixmap::load() function. If the file format uses more than 1 bit per pixel, the resulting bitmap will be dithered automatically.

See also QPixmap::isNull() and QImageReader::imageFormat().

QBitmap::~QBitmap ()

Destroys the bitmap.

void QBitmap::clear ()

Clears the bitmap, setting all its bits to Qt::color0.

QBitmap QBitmap::fromData ( const QSize & size, const uchar * bits, QImage::Format monoFormat = QImage::Format_MonoLSB ) [static]

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

The bitmap data has to be byte aligned and provided in in the bit order specified by monoFormat. The mono format must be either QImage::Format_Mono or QImage::Format_MonoLSB. Use QImage::Format_Mono to specify data on the XBM format.

See also fromImage().

QBitmap QBitmap::fromImage ( const QImage & image, Qt::ImageConversionFlags flags = Qt::AutoColor ) [static]

Returns a copy of the given image converted to a bitmap using the specified image conversion flags.

See also fromData().

void QBitmap::swap ( QBitmap & other )

Swaps bitmap other with this bitmap. This operation is very fast and never fails.

This function was introduced in Qt 4.8.

QBitmap QBitmap::transformed ( const QTransform & matrix ) const

Returns a copy of this bitmap, transformed according to the given matrix.

See also QPixmap::transformed().

QBitmap::operator QVariant () const

Returns the bitmap as a QVariant.

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

This is an overloaded function.

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

If the pixmap has a depth greater than 1, the resulting bitmap will be dithered automatically.

See also QPixmap::depth().