[Layout] Added base Tight data decoder class (TightDecoder).

git-svn-id: svn://svn.code.sf.net/p/tigervnc/code/trunk@3431 3789f03b-4d11-0410-bbf8-ca57d06f2519

diff --git a/java/src/com/tightvnc/decoder/TightDecoder.java b/java/src/com/tightvnc/decoder/TightDecoder.java
new file mode 100644 (file)
index 0000000..94a82d3
--- /dev/null
+++ b/java/src/com/tightvnc/decoder/TightDecoder.java
@@ -0,0 +1,79 @@
+package com.tightvnc.decoder;
+
+import com.tightvnc.decoder.common.Repaintable;
+import com.tightvnc.vncviewer.RfbInputStream;
+import java.awt.Graphics;
+import java.awt.Color;
+import java.awt.Image;
+import java.awt.Rectangle;
+import java.awt.Toolkit;
+import java.awt.image.ImageObserver;
+import java.util.zip.Inflater;
+
+//
+// Class that used for decoding Tight encoded data.
+//
+
+public class TightDecoder extends RawDecoder {
+
+  //
+  // Tight decoder constants
+  //
+
+  final static int TightExplicitFilter = 0x04;
+  final static int TightFill = 0x08;
+  final static int TightJpeg = 0x09;
+  final static int TightMaxSubencoding = 0x09;
+  final static int TightFilterCopy = 0x00;
+  final static int TightFilterPalette = 0x01;
+  final static int TightFilterGradient = 0x02;
+  final static int TightMinToCompress = 12;
+
+  // Tight encoder's data.
+  final static int tightZlibBufferSize = 512;
+
+  public TightDecoder(Graphics g, RfbInputStream is) {
+    super(g, is);
+    tightInflaters = new Inflater[4];
+  }
+
+  public TightDecoder(Graphics g, RfbInputStream is, int frameBufferW,
+                      int frameBufferH) {
+    super(g, is, frameBufferW, frameBufferH);
+    tightInflaters = new Inflater[4];
+  }
+
+  //
+  // Set and get methods for private TightDecoder
+  //
+
+  public void setRepainableControl(Repaintable r) {
+    repainatableControl = r;
+  }
+
+  //
+  // JPEG processing statistic methods
+  //
+
+  public int getNumJPEGRects() {
+    return statNumRectsTightJPEG;
+  }
+
+  public void setNumJPEGRects(int v) {
+    statNumRectsTightJPEG = v;
+  }
+
+  //
+  // Private members
+  //
+
+  private Inflater[] tightInflaters;
+  // Since JPEG images are loaded asynchronously, we have to remember
+  // their position in the framebuffer. Also, this jpegRect object is
+  // used for synchronization between the rfbThread and a JVM's thread
+  // which decodes and loads JPEG images.
+  private Rectangle jpegRect;
+  private Repaintable repainatableControl = null;
+  // Jpeg decoding statistics
+  private int statNumRectsTightJPEG = 0;
+}