Qt 5.9 | Qt GUI | C++ Classes | QSurface

Qt 5.9.9 Reference Documentation

# QSurface Class

The QSurface class is an abstraction of renderable surfaces in Qt. More...

Header: | #include <QSurface>
qmake: | QT += gui
Since: | Qt 5.0
Inherited By: | QOffscreenSurface and QWindow

- List of all members, including inherited members

## Public Types

enum | SurfaceClass { Window, Offscreen }
enum | SurfaceType { RasterSurface, OpenGLSurface, RasterGLSurface, OpenVGSurface }

## Public Functions

virtual | ~QSurface()
virtual QSurfaceFormat | format() const = 0
virtual QSize | size() const = 0
bool | supportsOpenGL() const
SurfaceClass | surfaceClass() const
virtual QPlatformSurface * | surfaceHandle() const = 0
virtual SurfaceType | surfaceType() const = 0

## Protected Functions

| QSurface(SurfaceClass type)

## Detailed Description

The QSurface class is an abstraction of renderable surfaces in Qt.

The size of the surface is accessible with the size() function. The rendering specific attributes of the surface are accessible through the format() function.

## Member Type Documentation

### enum QSurface::SurfaceClass

The SurfaceClass enum describes the actual subclass of the surface.

Constant | Value | Description
--- | --- | ---
`QSurface::Window` | `0` | The surface is an instance of QWindow.
`QSurface::Offscreen` | `1` | The surface is an instance of QOffscreenSurface.

### enum QSurface::SurfaceType

The SurfaceType enum describes what type of surface this is.

Constant | Value | Description
--- | --- | ---
`QSurface::RasterSurface` | `0` | The surface is is composed of pixels and can be rendered to using a software rasterizer like Qt's raster paint engine.
`QSurface::OpenGLSurface` | `1` | The surface is an OpenGL compatible surface and can be used in conjunction with QOpenGLContext.
`QSurface::RasterGLSurface` | `2` | The surface can be rendered to using a software rasterizer, and also supports OpenGL. This surface type is intended for internal Qt use, and requires the use of private API.
`QSurface::OpenVGSurface` | `3` | The surface is an OpenVG compatible surface and can be used in conjunction with OpenVG contexts.

## Member Function Documentation

### `[protected]` QSurface::QSurface(SurfaceClass type)

Creates a surface with the given type.

### `[virtual]` QSurface::~QSurface()

Destroys the surface.

### `[pure virtual]` QSurfaceFormat QSurface::format() const

Returns the format of the surface.

### `[pure virtual]` QSize QSurface::size() const

Returns the size of the surface in pixels.

### bool QSurface::supportsOpenGL() const

Returns true if the surface is OpenGL compatible and can be used in conjunction with QOpenGLContext; otherwise returns false.

This function was introduced in Qt 5.3.

### SurfaceClass QSurface::surfaceClass() const

Returns the surface class of this surface.

### `[pure virtual]` QPlatformSurface *QSurface::surfaceHandle() const

Returns a handle to the platform-specific implementation of the surface.

### `[pure virtual]` SurfaceType QSurface::surfaceType() const

Returns the type of the surface.