Texture class

A rectangle upon which a backend texture is mapped.

Backend textures are images that can be applied (mapped) to an area of the Flutter view. They are created, managed, and updated using a platform-specific texture registry. This is typically done by a plugin that integrates with host platform video player, camera, or OpenGL APIs, or similar image sources.

A texture widget refers to its backend texture using an integer ID. Texture IDs are obtained from the texture registry and are scoped to the Flutter view. Texture IDs may be reused after deregistration, at the discretion of the registry. The use of texture IDs currently unknown to the registry will silently result in a blank rectangle.

Texture widgets are repainted autonomously as dictated by the backend (e.g. on arrival of a video frame). Such repainting generally does not involve executing Dart code.

The size of the rectangle is determined by its parent widget, and the texture is automatically scaled to fit.

See also:

Inheritance

Constructors

Texture({Key key, @required int textureId })
Creates a widget backed by the texture identified by textureId.
const

Properties

textureId → int
The identity of the backend texture.
final
hashCode → int
The hash code for this object. [...]
read-only, inherited
key → Key
Controls how one widget replaces another widget in the tree. [...]
final, inherited
runtimeType → Type
A representation of the runtime type of the object.
read-only, inherited

Methods

createRenderObject(BuildContext context) → TextureBox
Creates an instance of the RenderObject class that this RenderObjectWidget represents, using the configuration described by this RenderObjectWidget. [...]
override
updateRenderObject(BuildContext context, covariant TextureBox renderObject) → void
Copies the configuration described by this RenderObjectWidget to the given RenderObject, which will be of the same type as returned by this object's createRenderObject. [...]
override
createElement() → LeafRenderObjectElement
RenderObjectWidgets always inflate to a RenderObjectElement subclass.
inherited
debugDescribeChildren() → List<DiagnosticsNode>
Returns a list of DiagnosticsNode objects describing this node's children. [...]
@protected, inherited
debugFillProperties(DiagnosticPropertiesBuilder properties) → void
Add additional properties associated with the node. [...]
inherited
didUnmountRenderObject(covariant RenderObject renderObject) → void
A render object previously associated with this widget has been removed from the tree. The given RenderObject will be of the same type as returned by this object's createRenderObject.
@protected, inherited
noSuchMethod(Invocation invocation) → dynamic
Invoked when a non-existent method or property is accessed. [...]
inherited
toDiagnosticsNode({String name, DiagnosticsTreeStyle style }) → DiagnosticsNode
Returns a debug representation of the object that is used by debugging tools and by toStringDeep. [...]
inherited
toString({DiagnosticLevel minLevel: DiagnosticLevel.debug }) → String
Returns a string representation of this object.
inherited
toStringDeep({String prefixLineOne: '', String prefixOtherLines, DiagnosticLevel minLevel: DiagnosticLevel.debug }) → String
Returns a string representation of this node and its descendants. [...]
inherited
toStringShallow({String joiner: ', ', DiagnosticLevel minLevel: DiagnosticLevel.debug }) → String
Returns a one-line detailed description of the object. [...]
inherited
toStringShort() → String
A short, textual description of this widget.
inherited

Operators

operator ==(dynamic other) → bool
The equality operator. [...]
inherited