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

Package-level declarations

Types

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data class RenderBlock(var inBound: Boolean = false, var inSampleSize: Int = 1, var renderOffset: IntOffset = IntOffset.Zero, var renderSize: IntSize = IntSize.Zero, var sliceRect: Rect = Rect(0, 0, 0, 0), bitmap: Bitmap? = null)
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class RotationIllegalException(msg: String = "Illegal rotation angle.") : RuntimeException
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data class SamplingCanvasViewPort(val scale: Float, val visualRect: Rect)

渲染的视口对象

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

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

Properties

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Functions

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fun calculateInSampleSize(srcWidth: Int, reqWidth: Int): Int
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fun checkRectInBound(stX1: Float, stY1: Float, edX1: Float, edY1: Float, stX2: Float, stY2: Float, edX2: Float, edY2: Float): Boolean
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fun createBitmapRegionDecoder(inputStream: InputStream): BitmapRegionDecoder?

通过流创建BitmapRegionDecoder

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fun createSamplingDecoder(file: File): SamplingDecoder?

通过文件创建SamplingDecoder

fun createSamplingDecoder(decoder: BitmapRegionDecoder, rotation: SamplingDecoder.Rotation = SamplingDecoder.Rotation.ROTATION_0): SamplingDecoder

创建SamplingDecoder的主要方法

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fun ExifInterface.getDecoderRotation(): SamplingDecoder.Rotation

通过Exif接口获取SamplingDecoder的旋转方向

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fun ZoomableViewState.getViewPort(): SamplingCanvasViewPort

从ZoomableView状态直接获取当前视口对象

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@Composable
fun rememberSamplingDecoder(file: File): Pair<SamplingDecoder?, Exception?>
@Composable
fun rememberSamplingDecoder(inputStream: InputStream, rotation: SamplingDecoder.Rotation = SamplingDecoder.Rotation.ROTATION_0): Pair<SamplingDecoder?, Exception?>

创建SamplingDecoder的方法

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@Composable
fun SamplingCanvas(samplingDecoder: SamplingDecoder, viewPort: SamplingCanvasViewPort)

用于ImageViewer/ZoomableView进行分块显示大型图片的配套组件