Python qt full screen image how to#

The complete list of supported file formats are available through the supportedImageFormats() and supportedImageFormats() functions. Simply call the save() function to save a QPixmap object.

Python qt full screen image how to#

See The Qt Resource System overview for details on how to embed images and other resource files in the applicationвЂ™s executable. When loading an image, the file name can either refer to an actual file on disk or to one of the applicationвЂ™s embedded resources. QPixmap provides several ways of reading an image file: The file can be loaded when constructing the QPixmap object, or by using the load() or loadFromData() functions later on. In addition, there are several functions that enables transformation of the pixmap. QPixmap provides a collection of functions that can be used to obtain a variety of information about the pixmap. Alternatively, if no manipulation is desired, the image file can be loaded directly into a QPixmap. Typically, the QImage class is used to load an image file, optionally manipulating the image data, before the QImage object is converted into a QPixmap to be shown on screen. There are functions to convert between QImage and QPixmap. However, the fill() function is available for initializing the entire pixmap with a given color. Pixels can only be accessed through QPainter functions or by converting the QPixmap to a QImage. Because QPixmap is a QPaintDevice subclass, QPainter can be used to draw directly onto pixmaps. Note that the pixel data in a pixmap is internal and is managed by the underlying window system. For more information, see the Implicit Data Sharing documentation. QPixmap objects can be passed around by value since the QPixmap class uses implicit data sharing. QLabel has a pixmap property, whereas QAbstractButton has an icon property. Finally, the QPicture class is a paint device that records and replays QPainter commands.ДЄ QPixmap can easily be displayed on the screen using QLabel or one of QAbstractButton вЂs subclasses (such as QPushButton and QToolButton ). The isQBitmap() function returns true if a QPixmap object is really a bitmap, otherwise returns false. QBitmap is only a convenience class that inherits QPixmap, ensuring a depth of 1. QImage is designed and optimized for I/O, and for direct pixel access and manipulation, while QPixmap is designed and optimized for showing images on screen. Qt provides four classes for handling image data: QImage, QPixmap, QBitmap and QPicture. Def convertFromImage (img)Дef createHeuristicMask ()Дef createMaskFromColor (maskColor)Дef load (fileName])Дef loadFromData (buf])Дef loadFromData (data])Дef save (device])Дef save (fileName])Дef scaled (s])Дef scaled (w, h])Дef scaledToHeight (h)Дef scaledToWidth (w)Дef scroll (dx, dy, rect)Дef scroll (dx, dy, x, y, width, height)Дef transformed (arg_1)