- Qt 6.9
- Qt GUI
- Paint System
- Painting Classes
- Qt 6.9.3 Reference Documentation

Reading and Writing Image Files ◦ Rendering in 3D

# Painting Classes

See also this introduction to the Qt coordinate system.

QBitmap | Monochrome (1-bit depth) pixmaps
QBrush | Defines the fill pattern of shapes drawn by QPainter
QColor | Colors based on RGB, HSV or CMYK values
QColorSpace | Color space abstraction
QColorTransform | Transformation between color spaces
QColormap | Maps device independent QColors to device dependent pixel values
QConicalGradient | Used in combination with QBrush to specify a conical gradient brush
QFont | Specifies a query for a font used for drawing text
QFontMetrics | Font metrics information
QFontMetricsF | Font metrics information
QGenericMatrix | Template class that represents a NxM transformation matrix with N columns and M rows
QGradient | Used in combination with QBrush to specify gradient fills
QIcon | Scalable icons in different modes and states
QIconEngine | Abstract base class for QIcon renderers
QImage | Hardware-independent image representation 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
QLine | Two-dimensional vector using integer precision
QLineF | Two-dimensional vector using floating point precision
QLinearGradient | Used in combination with QBrush to specify a linear gradient brush
QMargins | Defines the four margins of a rectangle
QMarginsF | Defines the four margins of a rectangle
QPageRanges | Represents a collection of page ranges
QPagedPaintDevice | Represents a paint device that supports multiple pages
QPaintDevice | The base class of objects that can be painted on with QPainter
QPaintEngine | Abstract definition of how QPainter draws to a given device on a given platform
QPainter | Performs low-level painting on widgets and other paint devices
QPainterPath | Container for painting operations, enabling graphical shapes to be constructed and reused
QPainterPathStroker | Used to generate fillable outlines for a given painter path
QPainterStateGuard | RAII convenience class for balanced QPainter::save() and QPainter::restore() calls
QPdfOutputIntent
QPdfWriter | Class to generate PDFs that can be used as a paint device
QPen | Defines how a QPainter should draw lines and outlines of shapes
QPixmap | Off-screen image representation that can be used as a paint device
QPoint | Defines a point in the plane using integer precision
QPointF | Defines a point in the plane using floating point precision
QPolygon | List of points using integer precision
QPolygonF | List of points using floating point precision
QRadialGradient | Used in combination with QBrush to specify a radial gradient brush
QRect | Defines a rectangle in the plane using integer precision
QRectF | Defines a finite rectangle in the plane using floating point precision
QRegion | Specifies a clip region for a painter
QRgba64 | Struct contains a 64-bit RGB color
QRgbaFloat | Struct contains a four part RGBA floating-point color
QSize | Defines the size of a two-dimensional object using integer point precision
QSizeF | Defines the size of a two-dimensional object using floating point precision
QStylePainter | Convenience class for drawing QStyle elements inside a widget
QSupportedWritingSystems | Used when registering fonts with the internal Qt fontdatabase
QSvgGenerator | Paint device that is used to create SVG drawings
QSvgRenderer | Used to draw the contents of SVG files onto paint devices
QSvgWidget | Widget that is used to display the contents of Scalable Vector Graphics (SVG) files
QTransform | Specifies 2D transformations of a coordinate system
QVector2D | Represents a vector or vertex in 2D space

Reading and Writing Image Files ◦ Rendering in 3D