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• 0.9.2
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• WritePng.scala

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geotrellis.io.WritePng.scala Maven / Gradle / Ivy

package geotrellis.io

import geotrellis._
import geotrellis.render._
import geotrellis.render.png._

/**
 * Write out a PNG graphic file to the file system at the specified path.
 */
case class WritePng(r:Op[Raster], path:Op[String],
                    colorBreaks:Op[ColorBreaks],
                    noDataColor:Op[Int])
extends Op4(r, path, colorBreaks, noDataColor) ({
  (r, path, colorBreaks, noDataColor) => {
    val breaks = colorBreaks.limits
    val colors = colorBreaks.colors
    val renderer = Renderer(breaks, colors, noDataColor)
    val r2 = renderer.render(r)
    val bytes = new Encoder(renderer.settings).writePath(path, r2)
    Result(())
  }
})

/**
 * Write out a PNG file of a raster that contains RGBA values)
 */
case class WritePngRgba(r:Op[Raster], path:Op[String]) extends Op2(r, path)({
  (r, path) =>
    val bytes = new Encoder(Settings(Rgba, PaethFilter)).writePath(path, r)
    Result(bytes)
})