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# Multimedia, Graphics, and Printing

These classes provide support for graphics (2D, and with OpenGL, 3D), image encoding, decoding, and manipulation, sound, animation, printing etc.

See also this introduction to the Qt coordinate system.

QBitmap | Monochrome (1-bit depth) pixmaps
QBrush | Defines the fill pattern of shapes drawn by a QPainter
QColor | Colors based on RGB or HSV values
QColorDialog | Dialog widget for specifying colors
QDirectPainter | Direct access to the video hardware
QFont | Font used for drawing text
QFontDatabase | Information about the fonts available in the underlying window system
QFontInfo | General information about fonts
QFontMetrics | Font metrics information
QFontMetricsF | Font metrics information
QGL | Miscellaneous identifiers used in the Qt OpenGL module
QGLColormap | Used for installing custom colormaps into QGLWidgets
QGLContext | Encapsulates an OpenGL rendering context
QGLFormat | The display format of an OpenGL rendering context
QGLWidget | Widget for rendering OpenGL graphics
QIcon | Scalable icons in different modes and states
QIconEngine | Abstract base class for QIcon renderers
QImage | Hardware-independent pixmap that allows direct access to the pixel data, and can be used as a paint device
QImageReader | Format independent interface for reading images from files or other devices
QImageWriter | Format independent interface for writing images to files or other devices
QMatrix | 2D transformations of a coordinate system
QMovie | Convenience class for playing movies with QImageReader
QPaintDevice | The base class of objects that can be painted
QPainter | Performs low-level painting on widgets and other paint devices
QPalette | Color groups for each widget state
QPen | Defines how a QPainter should draw lines and outlines of shapes
QPicture | Paint device that records and replays QPainter commands
QPictureIO | Parameters for loading and saving pictures
QPixmap | Off-screen, pixel-based paint device
QPixmapCache | Application-wide cache for pixmaps
QPoint | Defines a point in the plane
QPolygon | Vector of points
QPolygonF | Vector of floating point points
QPrinter | Paint device that paints on a printer
QRect | Defines a rectangle in the plane
QRectF | Defines a rectangle in the plane using floating point coordinates for accuracy
QRegion | Clip region for a painter
QSize | Defines the size of a two-dimensional object
QSizeF | Defines the size of a two-dimensional object using floating point values for accuracy
QSound | Access to the platform audio facilities
QStylePainter | Convenience class for drawing QStyle elements inside a widget