geotrellis.server.ExtentReification.scala Maven / Gradle / Ivy

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GeoTrellis Server is a set of components designed to simplify viewing, processing, and serving raster data from arbitrary sources with an emphasis on doing so in a functional style.

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/*
 * Copyright 2020 Azavea
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package geotrellis.server

import geotrellis.raster.{CellSize, MultibandTile, ProjectedRaster}
import geotrellis.vector.Extent
import cats.Contravariant

trait ExtentReification[F[_], A] {
  def extentReification(self: A): (Extent, Option[CellSize]) => F[ProjectedRaster[MultibandTile]]
}

object ExtentReification {
  implicit def contravariantExtentReification[F[_]]: Contravariant[ExtentReification[F, *]] =
    new Contravariant[ExtentReification[F, *]] {
      def contramap[A, B](fa: ExtentReification[F, A])(f: B => A): ExtentReification[F, B] = { self =>
        fa.extentReification(f(self))
      }
    }
}