ResolutionInfo

public abstract class ResolutionInfo
extends Object

java.lang.Object
   ↳ androidx.camera.core.ResolutionInfo


A ResolutionInfo allows the application to know the resolution information of a specific use case.

Applications can know the resolution information of Preview before a SurfaceRequest is received, or know the resolution information of ImageAnalysis before an ImageProxy is received from ImageAnalysis.Analyzer.

Summary

Public methods

abstract Rect getCropRect()

Returns the crop rectangle.

abstract Size getResolution()

Returns the output resolution used for the use case.

abstract int getRotationDegrees()

Returns the rotation degrees needed to transform the output resolution to the target rotation.

Inherited methods

Public methods

getCropRect

public abstract Rect getCropRect ()

Returns the crop rectangle.

The crop rectangle specifies the region of valid pixels in the buffer, using coordinates from (0, 0) to the (width, height) of the resolution obtained by getResolution(). The dimensions need to be flipped by the rotation degrees obtained via getRotationDegrees() to match the target rotation setting.

If the use case is configured with a ViewPort, this value is calculated based on the configuration of ViewPort; if not, it returns the full rect of the buffer which the dimensions will be the same as the value obtained from getResolution().

Returns
Rect

getResolution

public abstract Size getResolution ()

Returns the output resolution used for the use case.

The resolution will be expressed in the coordinates of the camera sensor. The dimensions need to be flipped by the rotation degrees obtained via getRotationDegrees() to match the target rotation setting.

Returns
Size

getRotationDegrees

public abstract int getRotationDegrees ()

Returns the rotation degrees needed to transform the output resolution to the target rotation.

This is a clockwise rotation in degrees that needs to be applied to the output buffer so the image appears upright at the target rotation setting. The rotation will be determined by the camera sensor orientation value and target rotation setting.

Returns
int The rotation in degrees which will be a value in {0, 90, 180, 270}.