QBitmap露

PyQt5.QtGui.QBitmap: Inherits from QPixmap.

Description露

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, constructing QRegion objects, and for setting masks for pixmaps and widgets.

QBitmap is a QPixmap subclass ensuring a depth of 1, except for null objects which have a depth of 0. If a pixmap with a depth greater than 1 is assigned to a bitmap, the bitmap will be dithered automatically.

Use the QColor objects color0 and color1 when drawing on a QBitmap object (or a QPixmap object with depth 1).

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 pixels) and 1-bits indicate foreground (or opaque pixels). Use the clear() function to set all the bits to color0. Note that using the black and white colors make no sense because the QColor::pixel() value is not necessarily 0 for black and 1 for white.

The QBitmap class provides the transformed() function returning a transformed copy of the bitmap; use the QTransform argument to translate, scale, shear, and rotate the bitmap. In addition, QBitmap provides the static fromData() function which returns a bitmap constructed from the given uchar data, and the static fromImage() function returning a converted copy of a QImage object.

Just like the QPixmap class, QBitmap is optimized by the use of implicit data sharing. For more information, see the Implicit Data Sharing documentation.

Methods露

__init__(): Constructs a null bitmap.

See also

isNull().

__init__(QBitmap): TODO

__init__(QPixmap)

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

depth(), fromImage(), fromData().

__init__(QSize): Constructs a bitmap with the given size. The pixels in the bitmap are uninitialized.

See also

clear().

__init__(Any): TODO

__init__(int, int): TODO

__init__(str, format: str = None)

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 load() function. If the file format uses more than 1 bit per pixel, the resulting bitmap will be dithered automatically.

See also

isNull(), imageFormat().

clear(): TODO

@staticmethod fromData(QSize, bytes, format: Format = Format_MonoLSB) → QBitmap

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 Format_Mono or Format_MonoLSB. Use Format_Mono to specify data on the XBM format.

See also

fromImage().

@staticmethod fromImage(QImage, flags: Union[ImageConversionFlags, ImageConversionFlag] = Qt.ImageConversionFlag.AutoColor) → QBitmap: TODO

swap(QBitmap): TODO

transformed(QTransform) → QBitmap: Returns a copy of this bitmap, transformed according to the given matrix.

See also

transformed().