geotrellis.raster.io.geotiff.Int16GeoTiffMultibandTile.scala Maven / Gradle / Ivy

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GeoTrellis is an open source geographic data processing engine for high performance applications.

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package geotrellis.raster.io.geotiff

import geotrellis.raster._
import geotrellis.raster.io.geotiff.compression._

import java.nio.ByteBuffer

class Int16GeoTiffMultibandTile(
  compressedBytes: Array[Array[Byte]],
  decompressor: Decompressor,
  segmentLayout: GeoTiffSegmentLayout,
  compression: Compression,
  bandCount: Int,
  hasPixelInterleave: Boolean,
  val cellType: ShortCells with NoDataHandling
) extends GeoTiffMultibandTile(compressedBytes, decompressor, segmentLayout, compression, bandCount, hasPixelInterleave)
    with Int16GeoTiffSegmentCollection {

  val noDataValue: Option[Short] = cellType match {
    case ShortCellType => None
    case ShortConstantNoDataCellType => Some(Short.MinValue)
    case ShortUserDefinedNoDataCellType(nd) => Some(nd)
  }

  protected def createSegmentCombiner(targetSize: Int): SegmentCombiner =
    new SegmentCombiner(bandCount) {
      private val arr = Array.ofDim[Short](targetSize)

      def set(targetIndex: Int, v: Int): Unit = {
        arr(targetIndex) = i2s(v)
      }

      def setDouble(targetIndex: Int, v: Double): Unit = {
        arr(targetIndex) = d2s(v)
      }

      def getBytes(): Array[Byte] = {
        val result = new Array[Byte](targetSize * ShortConstantNoDataCellType.bytes)
        val bytebuff = ByteBuffer.wrap(result)
        bytebuff.asShortBuffer.put(arr)
        result
      }
    }
}