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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 {
final static int EncodingCoRRE = 4;
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 data output stream
//
if (dos != null) {
dos.writeInt(nSubrects);
dos.write(bg_buf);
dos.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);
}
}
}
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