[Layout, Developement] Added CoRRE data decoder class.

git-svn-id: svn://svn.code.sf.net/p/tigervnc/code/trunk@3420 3789f03b-4d11-0410-bbf8-ca57d06f2519

diff --git a/java/src/com/tightvnc/decoder/CoRREDecoder.java b/java/src/com/tightvnc/decoder/CoRREDecoder.java
new file mode 100644 (file)
index 0000000..56cb7ab
--- /dev/null
+++ b/java/src/com/tightvnc/decoder/CoRREDecoder.java
@@ -0,0 +1,74 @@
+package com.tightvnc.decoder;
+
+import com.tightvnc.vncviewer.RfbInputStream;
+import java.awt.Graphics;
+import java.awt.Color;
+import java.io.IOException;
+
+//
+// Class that used for decoding CoRRE encoded data.
+//
+
+public class CoRREDecoder extends RawDecoder {
+
+  public CoRREDecoder(Graphics g, RfbInputStream is) {
+    super(g, is);
+  }
+
+  public CoRREDecoder(Graphics g, RfbInputStream is, int frameBufferW,
+                      int frameBufferH) {
+    super(g, is, frameBufferW, frameBufferH);
+  }
+
+  //
+  // Override handleRect method to decode CoRRE encoded data insted of
+  // raw pixel data.
+  //
+
+  public void handleRect(int x, int y, int w, int h) throws IOException {
+    int nSubrects = rfbis.readU32();
+
+    byte[] bg_buf = new byte[bytesPerPixel];
+    rfbis.readFully(bg_buf);
+    Color pixel;
+    if (bytesPerPixel == 1) {
+      pixel = getColor256()[bg_buf[0] & 0xFF];
+    } else {
+      pixel = new Color(bg_buf[2] & 0xFF, bg_buf[1] & 0xFF, bg_buf[0] & 0xFF);
+    }
+    graphics.setColor(pixel);
+    graphics.fillRect(x, y, w, h);
+
+    byte[] buf = new byte[nSubrects * (bytesPerPixel + 4)];
+    rfbis.readFully(buf);
+
+    //
+    // Save decoded data to RecordInterface
+    //
+
+    if (rec.canWrite()) {
+      rec.writeIntBE(nSubrects);
+      rec.write(bg_buf);
+      rec.write(buf);
+    }
+
+    int sx, sy, sw, sh;
+    int i = 0;
+
+    for (int j = 0; j < nSubrects; j++) {
+      if (bytesPerPixel == 1) {
+        pixel = getColor256()[buf[i++] & 0xFF];
+      } else {
+        pixel = new Color(buf[i+2] & 0xFF, buf[i+1] & 0xFF, buf[i] & 0xFF);
+        i += 4;
+      }
+      sx = x + (buf[i++] & 0xFF);
+      sy = y + (buf[i++] & 0xFF);
+      sw = buf[i++] & 0xFF;
+      sh = buf[i++] & 0xFF;
+
+      graphics.setColor(pixel);
+      graphics.fillRect(sx, sy, sw, sh);
+    }
+  }
+}