scale-sampling-decoder/com.jvziyaoyao.scale.image.sampling/SamplingDecoder

SamplingDecoder

class SamplingDecoder(decoder: RegionDecoder, rotation: SamplingDecoder.Rotation = Rotation.ROTATION_0, onRelease: () -> Unit = {}, thumbnails: ImageBitmap? = null) : CoroutineScope

用以提供SamplingCanvas显示大型图片，rememberSamplingDecoder，createSamplingDecoder

Parameters

thumbnails

默认显示的缓存图片，图片未完成加载时可用于显示占位

Constructors

SamplingDecoder

constructor(decoder: RegionDecoder, rotation: SamplingDecoder.Rotation = Rotation.ROTATION_0, onRelease: () -> Unit = {}, thumbnails: ImageBitmap? = null)

Types

enum Rotation : Enum<SamplingDecoder.Rotation>

Properties

var blockSize: Int

coroutineContext

open override val coroutineContext: CoroutineContext

var decoderHeight: Int

var decoderWidth: Int

val intrinsicSize: Size

var renderList: Array<Array<RenderBlock>>

val renderQueue: BlockingDeque<RenderBlock>

var thumbnail: ImageBitmap?

Functions

fun clearAllBitmap()

createTempBitmap

suspend fun createTempBitmap(targetWidth: Int = 720): ImageBitmap?

suspend fun decodeRegion(inSampleSize: Int, rect: Rect): ImageBitmap?

解码渲染区域

fun forEachBlock(action: (block: RenderBlock, column: Int, row: Int) -> Unit)

getRotationSize

fun getRotationSize(rotation: SamplingDecoder.Rotation): IntSize

suspend fun release()

setMaxBlockCount

fun setMaxBlockCount(count: Int): Boolean

startRenderQueue

fun startRenderQueue(onUpdate: () -> Unit)