androidx.camera.viewfinder.compose

Standalone Composable Viewfinder for Camera

Interfaces

CoordinateTransformer	Coordinate transformer that's used to convert coordinates from one space to another.
MutableCoordinateTransformer	CoordinateTransformer where the transformMatrix is mutable.

Objects

IdentityCoordinateTransformer

CoordinateTransformer where the transformMatrix is the identity matrix.

Top-level functions summary

MutableCoordinateTransformer	MutableCoordinateTransformer(matrix: Matrix) Creates a MutableCoordinateTransformer with the given matrix as the transformMatrix.
Unit	@Composable Viewfinder(     surfaceRequest: ViewfinderSurfaceRequest,     implementationMode: ImplementationMode,     transformationInfo: TransformationInfo,     modifier: Modifier,     coordinateTransformer: MutableCoordinateTransformer? ) Displays a media stream with the given transformations for crop and rotation while maintaining proper scaling.

Top-level functions

MutableCoordinateTransformer

Artifact: androidx.camera.viewfinder:viewfinder-compose

View Source

fun MutableCoordinateTransformer(matrix: Matrix = Matrix()): MutableCoordinateTransformer

Creates a MutableCoordinateTransformer with the given matrix as the transformMatrix.

Viewfinder

Artifact: androidx.camera.viewfinder:viewfinder-compose

View Source

Added in 1.4.0-alpha10

@Composable
fun Viewfinder(
    surfaceRequest: ViewfinderSurfaceRequest,
    implementationMode: ImplementationMode,
    transformationInfo: TransformationInfo,
    modifier: Modifier = Modifier,
    coordinateTransformer: MutableCoordinateTransformer? = null
): Unit

Displays a media stream with the given transformations for crop and rotation while maintaining proper scaling.

Provides a Surface for the given ViewfinderSurfaceRequest, surface can be accessed through ViewfinderSurfaceRequest.getSurface.

This has two underlying implementations either using an AndroidEmbeddedExternalSurface for ImplementationMode.EMBEDDED or an AndroidExternalSurface for ImplementationMode.EXTERNAL.

Parameters
surfaceRequest: ViewfinderSurfaceRequest	Details about the surface being requested
implementationMode: ImplementationMode	Determines the underlying implementation of the Surface.
transformationInfo: TransformationInfo	Specifies the required transformations for the media being displayed.
modifier: Modifier = Modifier	Modifier to be applied to the Viewfinder
coordinateTransformer: MutableCoordinateTransformer? = null	Coordinate transformer that can be used to convert Compose space coordinates such as touch coordinates to surface space coordinates. When the Viewfinder is displaying content from the camera, this transformer can be used to translate touch events into camera sensor coordinates for focus and metering actions. TODO(b/322420487): Add a sample with @sample