AlphaScale

Kotlin |Java

@UnstableApi
class AlphaScale : GlEffect

Scales the alpha value (i.e. the translucency) of a frame.

Summary

Public constructors
`AlphaScale(alphaScale: @FloatRange(from = 0) Float)` Creates a new instance to scale the entire frame's alpha values by `alphaScale`, to modify translucency.

Public functions
`Boolean`	`isNoOp(inputWidth: Int, inputHeight: Int)` Returns whether a `GlEffect` applies no change at every timestamp.
`AlphaScaleShaderProgram!`	`toGlShaderProgram(context: Context!, useHdr: Boolean)` Returns a `GlShaderProgram` that applies the effect.

AlphaScale(alphaScale: @FloatRange(from = 0) Float)

Creates a new instance to scale the entire frame's alpha values by alphaScale, to modify translucency.

An alphaScale value of 1 means no change is applied. A value below 1 increases translucency, and a value above 1 reduces translucency.

fun isNoOp(inputWidth: Int, inputHeight: Int): Boolean

Returns whether a GlEffect applies no change at every timestamp.

This can be used as a hint to skip this instance.

Parameters
`inputWidth: Int`	The input frame width, in pixels.
`inputHeight: Int`	The input frame height, in pixels.

fun toGlShaderProgram(context: Context!, useHdr: Boolean): AlphaScaleShaderProgram!

Returns a GlShaderProgram that applies the effect.

Parameters
`context: Context!`	A `Context`.
`useHdr: Boolean`	Whether input textures come from an HDR source. If `true`, colors will be in linear RGB BT.2020. If `false`, colors will be in linear RGB BT.709.

Throws
`androidx.media3.common.VideoFrameProcessingException`	If an error occurs while creating the .