Data commit

Task/Bitmap-Read-a-PPM-file/Scala/bitmap-read-a-ppm-file-1.scala

@@ -0,0 +1,46 @@
+import scala.io._
+import scala.swing._
+import java.io._
+import java.awt.Color
+import javax.swing.ImageIcon
+
+object Pixmap {
+   private case class PpmHeader(format:String, width:Int, height:Int, maxColor:Int)
+	
+   def load(filename:String):Option[RgbBitmap]={
+      implicit val in=new BufferedInputStream(new FileInputStream(filename))
+      val header=readHeader
+      if(header.format=="P6")
+      {
+         val bm=new RgbBitmap(header.width, header.height);
+         for(y <- 0 until bm.height; x <- 0 until bm.width; c=readColor)
+            bm.setPixel(x, y, c)
+         return Some(bm)
+      }
+      None
+   }
+
+   private def readHeader(implicit in:InputStream)={
+      var format=readLine
+		
+      var line=readLine
+      while(line.startsWith("#"))   //skip comments
+         line=readLine
+
+      val parts=line.split("\\s")
+      val width=parts(0).toInt
+      val height=parts(1).toInt
+      val maxColor=readLine.toInt
+		
+      new PpmHeader(format, width, height, maxColor)
+   }
+
+   private def readColor(implicit in:InputStream)=new Color(in.read, in.read, in.read)
+
+   private def readLine(implicit in:InputStream)={
+      var out=""
+      var b=in.read
+      while(b!=0xA){out+=b.toChar; b=in.read}
+      out
+   }
+}

Task/Bitmap-Read-a-PPM-file/Scala/bitmap-read-a-ppm-file-2.scala

@@ -0,0 +1,15 @@
+object PixmapTest {
+   def main(args: Array[String]): Unit = {
+      val img=Pixmap.load("image.ppm").get
+      val grayImg=BitmapOps.grayscale(img);
+      Pixmap.save(grayImg, "image_gray.ppm")
+
+      val mainframe=new MainFrame(){
+         title="Test"
+         visible=true
+         contents=new Label(){
+            icon=new ImageIcon(grayImg.image)
+         }
+      }
+   }
+}