mandelservice.scala

来自「resetful样式的ws样例,一种面向资源的webservices服务」· SCALA 代码 · 共 35 行

import java.awt.image._
import javax.imageio._
import javax.ws.rs._

package com.sun.jersey.samples.mandel {
 
@Path("({lx},{ly}),({ux},{uy})")
class MandelService(
        @PathParam("lx") lx: double, 
        @PathParam("ly") ly: double,
        @PathParam("ux") ux: double,
        @PathParam("uy") uy: double,
        @DefaultValue("512") @QueryParam("imageSize") imageSize: int,
        @DefaultValue("512") @QueryParam("limit") limit: int,
        @DefaultValue("8") @QueryParam("workers") workers: int) {

    val lower = new Complex(lx, ly);
    val upper = new Complex(ux, uy);
    val dx = upper.re - lower.re;
    val dy = upper.im - lower.im;

    val width : int = if (dx >= dy) imageSize else (dx/dy * imageSize).toInt

    val height : int = if (dy >= dx) imageSize else (dy/dx * imageSize).toInt
    
    @ProduceMime(Array("image/png"))
    @GET
    def getMandelbrot() = {
        val image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
        new ParallelMandelRenderer(workers, lower, upper, limit, image.getRaster()).render();
        image
    }
}

} // package