java/com/tigervnc/vncviewer/BIPixelBuffer.java

/* Copyright (C) 2012 Brian P. Hinz
 * 
 * This is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 * 
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this software; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
 * USA.
 */

package com.tigervnc.vncviewer;

import java.awt.*;
import java.awt.image.*;

import com.tigervnc.rfb.*;
import com.tigervnc.rfb.Exception;

public class BIPixelBuffer extends PlatformPixelBuffer implements ImageObserver
{
  public BIPixelBuffer(int w, int h, CConn cc_, DesktopWindow desktop_) {
    super(w, h, cc_, desktop_);
    clip = new Rectangle();
  }

  public void setPF(PixelFormat pf) {
    super.setPF(pf);
    if (source != null)
      source.newPixels(data, cm, 0, width_);
  }

  public void updateColourMap() {
    cm = new IndexColorModel(8, nColours, reds, greens, blues);
    if (source != null)
      source.newPixels(data, cm, 0, width_);
  }
  
  // resize() resizes the image, preserving the image data where possible.
  public void resize(int w, int h) {
    if (w == width() && h == height()) return;

    width_ = w;
    height_ = h;
    GraphicsEnvironment ge =
      GraphicsEnvironment.getLocalGraphicsEnvironment();
    GraphicsDevice gd = ge.getDefaultScreenDevice();
    GraphicsConfiguration gc = gd.getDefaultConfiguration();
    image = gc.createCompatibleImage(w, h, Transparency.TRANSLUCENT);
    image.setAccelerationPriority(1);
    image.createGraphics();
    data = new int[width() * height()];
    source = new MemoryImageSource(w, h, cm, data, 0, w);
    source.setAnimated(true);
    source.setFullBufferUpdates(false);
    source.newPixels(data, cm, 0, width_);
    sourceImage = tk.createImage(source);
  }

  public void fillRect(int x, int y, int w, int h, int pix) {
    Graphics2D graphics = (Graphics2D)image.getGraphics();
    switch (format.depth) {
    case 24:
      graphics.setColor(new Color(pix)); 
      graphics.fillRect(x, y, w, h); 
      break;
    default:
      Color color = new Color((0xff << 24) | (cm.getRed(pix) << 16) |
                              (cm.getGreen(pix) << 8) | (cm.getBlue(pix)));
      graphics.setColor(color); 
      graphics.fillRect(x, y, w, h); 
      break;
    }
    graphics.dispose();
  }

  public void imageRect(int x, int y, int w, int h, Object pix) {
    if (pix instanceof Image) {
      Image img = (Image)pix;
      clip = new Rectangle(x, y, w, h); 
      synchronized(clip) {
        tk.prepareImage(img, -1, -1, this);
        try {
          clip.wait(1000);
        } catch (InterruptedException e) {
          throw new Exception("Error decoding JPEG data");
        }
      } 
      clip = null;
      img.flush();
    } else {
      for (int j = 0; j < h; j++)
        System.arraycopy(pix, (w*j), data, width_ * (y + j) + x, w);
      source.newPixels(x, y, w, h, true);
      Graphics2D graphics = (Graphics2D)image.getGraphics();
      graphics.setClip(x, y, w, h);
      graphics.drawImage(sourceImage, 0, 0, null);
      graphics.setClip(0, 0, width(), height());
      graphics.dispose();
    }
  }

  public void copyRect(int x, int y, int w, int h, int srcX, int srcY) {
    Graphics2D graphics = (Graphics2D)image.getGraphics();
    graphics.copyArea(srcX, srcY, w, h, x - srcX, y - srcY);
    graphics.dispose();
  }

  public Image getImage() {
    return (Image)image;
  }

  public boolean imageUpdate(Image img, int infoflags, int x, int y, int w, int h) {
    if ((infoflags & (ALLBITS | ABORT)) == 0) {
      return true;
    } else {
      if ((infoflags & ALLBITS) != 0) {
        if (clip != null) {
          synchronized(clip) {
            Graphics2D graphics = (Graphics2D)image.getGraphics();
            graphics.drawImage(img, clip.x, clip.y, clip.width, clip.height, null); 
            graphics.dispose();
            clip.notify();
          }
        }
      }
      return false;
    }
  }

  BufferedImage image;
  MemoryImageSource source;
  int[] data;
  Image sourceImage;
  Rectangle clip;

  static LogWriter vlog = new LogWriter("BIPixelBuffer");
}