postscriptgraphics.java

代码是一个分类器的实现,其中使用了部分weka的源代码。可以将项目导入eclipse运行

      PixelGrabber grabber = new PixelGrabber(img, 0, 0, width, height, pixels, 0, width);
      grabber.grabPixels();
      ColorModel model = ColorModel.getRGBdefault();
      
      // print data to ps
      m_printstream.println("gsave");
      m_printstream.println(xTransform(xScale(x)) + " " + (yTransform(yScale(y)) - yScale(height)) + " translate");
      m_printstream.println(xScale(width) + " " + yScale(height) + " scale");
      m_printstream.println(width + " " + height + " " + "8" + " [" + width + " 0 0 " + (-height) + " 0 " + height + "]");
      m_printstream.println("{<");

      int index;
      for (int i = 0; i < height; i++) {
        for (int j = 0; j < width; j++) {
          index = i * width + j;
          m_printstream.print(toHex(model.getRed(pixels[index])));
          m_printstream.print(toHex(model.getGreen(pixels[index])));
          m_printstream.print(toHex(model.getBlue(pixels[index])));
        }
        m_printstream.println();
      }
      
      m_printstream.println(">}");
      m_printstream.println("false 3 colorimage");
      m_printstream.println("grestore");
      return true;
    }
    catch (Exception e) {
      e.printStackTrace();
      return false;
    }
  }
  
  /**
   * calls drawImage(Image,int,int,int,int,Color,ImageObserver) with the color 
   * WHITE as background
   * 
   * @see #drawImage(Image,int,int,int,int,Color,ImageObserver)
   * @see Color#WHITE
   */
  public boolean drawImage(Image img, int x, int y, int width, int height, ImageObserver observer){
    return drawImage(img, x, y, width, height, Color.WHITE, observer);
  }
  
  /**
   * Not implemented
   */
  public boolean drawImage(Image img, int dx1, int dy1, int dx2, int dy2, int sx1, int sy1, int sx2, int sy2, Color bgcolor, ImageObserver  observer){
    return false;
  }
  
  /**
   * calls drawImage(Image,int,int,int,int,int,int,int,int,Color,ImageObserver)
   * with Color.WHITE as background color
   * 
   * @see #drawImage(Image,int,int,int,int,int,int,int,int,Color,ImageObserver)
   */
  public boolean drawImage(Image img, int dx1, int dy1, int dx2, int dy2, int sx1, int sy1, int sx2, int sy2, ImageObserver observer){
    return drawImage(img, dx1, dy1, dx2, dy2, sx1, sy1, sx2, sy2, Color.WHITE, observer);
  }
  
  
  /**
   * Draw a line in current pen color.
   *
   * @param x1 starting x coord
   * @param y1 starting y coord
   * @param x2 ending x coord
   * @param y2 ending y coord
   */
  public void drawLine(int x1, int y1, int x2, int y2){
    setStateToLocal();
    m_printstream.println(xTransform(xScale(x1)) + " " + yTransform(yScale(y1)) + " moveto " + xTransform(xScale(x2)) + " " + yTransform(yScale(y2)) + " lineto stroke");
  }
  
  /**
   * Draw an Oval outline in current pen color.
   *
   * @param x x-axis center of oval
   * @param y y-axis center of oval
   * @param width oval width
   * @param height oval height
   */
  public void drawOval(int x, int y, int width, int height){
    setStateToLocal();
    m_printstream.println(xTransform(xScale(x)) + " " + yTransform(yScale(y)) + " " + xScale(width) + " " + yScale(height) + " false Oval");
  }
  
  /**
   * Not implemented
   */
  public void drawPolygon(int[] xPoints, int[] yPoints, int nPoints){}
  
  /**
   * Not implemented
   */
  public void drawPolyline(int[] xPoints, int[] yPoints, int nPoints){}
  
  /**
   * Draw an outlined rectangle in current pen color.
   *
   * @param x starting x coord
   * @param y starting y coord
   * @param width rectangle width
   * @param height rectangle height
   */
  public void drawRect(int x, int y, int width, int height){   
    setStateToLocal();
    m_printstream.println(xTransform(xScale(x)) + " " + yTransform(yScale(y)) + " " + xScale(width) + " " + yScale(height) + " false Rect");   
  }
  
  /**
   * Not implemented
   */
  public void drawRoundRect(int x, int y, int width, int height, int arcWidth, int arcHeight){}
  
  /**
   * Not implemented
   */
  public void drawString(AttributedCharacterIterator iterator, int x, int y){}
  
  /**
   * Draw text in current pen color.
   *
   * @param str Text to output
   * @param x starting x coord
   * @param y starting y coord
   */
  public void drawString(String str, int x, int y){
    setStateToLocal();
    m_printstream.println(xTransform(xScale(x)) + " " + yTransform(yScale(y)) + " moveto" + " (" + str + ") show stroke");
  }
  
  /**
   * Draw a filled rectangle with 3D effect in current pen color.
   * (Current implementation: draw simple filled rectangle)
   *
   * @param x starting x coord
   * @param y starting y coord
   * @param width rectangle width
   * @param height rectangle height
   * @param raised True: appear raised, False: appear etched
   */
  public void fill3DRect(int x, int y, int width, int height, boolean raised){
    fillRect(x, y, width, height);
  }
  
  /**
   * Not implemented
   */
  public void fillArc(int x, int y, int width, int height, int startAngle, int arcAngle){}
  
  /**
   * Draw a filled Oval in current pen color.
   *
   * @param x x-axis center of oval
   * @param y y-axis center of oval
   * @param width oval width
   * @param height oval height
   */
  public void fillOval(int x, int y, int width, int height){
    setStateToLocal();
    m_printstream.println(xTransform(xScale(x)) + " " + yTransform(yScale(y)) + " " + xScale(width) + " " + yScale(height) + " true Oval");
  }
  
  /**
   * Not implemented
   */
  public void fillPolygon(int[] xPoints, int[] yPoints, int nPoints){}
  
  /**
   * Not implemented
   */
  public void fillPolygon(Polygon p){}
  
  /**
   * Draw a filled rectangle in current pen color.
   *
   * @param x starting x coord
   * @param y starting y coord
   * @param width rectangle width
   * @param height rectangle height
   */
  
  public void fillRect(int x, int y, int width, int height){
    if (width == m_extent.width && height == m_extent.height) {
      clearRect(x, y, width, height); // if we're painting the entire background, just make it white
    } else {
      if (DEBUG)
        m_printstream.println("% fillRect");
      setStateToLocal();
      m_printstream.println(xTransform(xScale(x)) + " " + yTransform(yScale(y)) + " " + xScale(width) + " " + yScale(height) + " true Rect");
    }
  }
  
  /**
   * Not implemented
   */
  public void fillRoundRect(int x, int y, int width, int height, int arcWidth, int arcHeight){}
  
  /**
   * Not implemented
   */
  public void finalize(){}
  
  /**
   * Not implemented
   */
  public Shape getClip(){
    return(null);
  }
  
  /**
   * This returns the full current drawing area
   * @return full drawing area
   */
  public Rectangle getClipBounds(){
    return(new Rectangle(0, 0, m_extent.width, m_extent.height));
  }
  
  /**
   * This returns the full current drawing area
   * @return full drawing area
   */
  public Rectangle getClipBounds(Rectangle r) {
    r.setBounds(0, 0, m_extent.width, m_extent.height);
    return r;
  }
  
  /**
   * Not implemented
   */
  public Rectangle getClipRect() {return null;}
  
  /**
   * Get current pen color.
   *
   * @return current pen color.
   */
  public Color getColor(){
    return (m_localGraphicsState.getColor());
  }
  
  /**
   * Get current font.
   *
   * @return current font.
   */
  public Font getFont(){
    return (m_localGraphicsState.getFont());
  }
  
  /**
   * Get Font metrics
   *
   * @param f Font 
   * @return Font metrics.
   */
  public FontMetrics getFontMetrics(Font f){
    return(Toolkit.getDefaultToolkit().getFontMetrics(f));  
    
  }
  
  /**
   * Not implemented
   */
  public void setClip(int x, int y, int width, int height) {}
  
  /**
   * Not implemented
   */
  public void setClip(Shape clip){}
  
  /**
   * Set current pen color. Default to black if null.
   *
   * @param c new pen color.
   */
  public void setColor(Color c){
    if (c != null){
      m_localGraphicsState.setColor(c);
      if (m_psGraphicsState.getColor().equals(c)) {
        return;
      }
      m_psGraphicsState.setColor(c);
    } else {
      m_localGraphicsState.setColor(Color.black);
      m_psGraphicsState.setColor(getColor());
    }
    m_printstream.print(getColor().getRed()/255.0);
    m_printstream.print(" ");
    m_printstream.print(getColor().getGreen()/255.0);
    m_printstream.print(" ");
    m_printstream.print(getColor().getBlue()/255.0);
    m_printstream.println(" setrgbcolor");
  }
  
  /**
   * replaces the font (PS name) if necessary and returns the new name
   */
  private static String replacePSFont(String font) {
    String      result;
    
    result = font;
    
    // do we have to replace it? -> same style, size
    if (m_PSFontReplacement.containsKey(font)) {
      result = m_PSFontReplacement.get(font).toString();
      if (DEBUG)
        System.out.println("switched font from '" + font + "' to '" + result +  "'");
    }
    
    return result;
  }
  
  /**
   * Set current font. Default to Plain Courier 11 if null.
   *
   * @param font new font.
   */
  public void setFont(Font font){
    
    if (font != null){
      m_localGraphicsState.setFont(font);
      if (   font.getName().equals(m_psGraphicsState.getFont().getName())
          && (m_psGraphicsState.getFont().getStyle() == font.getStyle())
          && (m_psGraphicsState.getFont().getSize() == yScale(font.getSize())))
        return;
      m_psGraphicsState.setFont(new Font(font.getName(), font.getStyle(), yScale(getFont().getSize())));
    } 
    else {
      m_localGraphicsState.setFont(new Font ("Courier", Font.PLAIN, 11));
      m_psGraphicsState.setFont(getFont());
    }
    
    m_printstream.println("/(" + replacePSFont(getFont().getPSName()) + ")" + " findfont");
    m_printstream.println(yScale(getFont().getSize()) + " scalefont setfont");        
  }
  
  /**
   * Not implemented
   */
  public void setPaintMode(){}
  
  /**
   * Not implemented
   */
  public void setXORMode(Color c1){}
  
  /**
   * Translates the origin of the graphics context to the point (x, y) in the 
   * current coordinate system. Modifies this graphics context so that its new 
   * origin corresponds to the point (x, y) in this graphics context's original 
   * coordinate system. All coordinates used in subsequent rendering operations 
   * on this graphics context will be relative to this new origin.
   * 
   * @param x the x coordinate.
   * @param y the y coordinate.
   */
  public void translate(int x, int y){
    if (DEBUG)
      System.out.println("translate with x = " + x + " and y = " + y);
    m_localGraphicsState.setXOffset(m_localGraphicsState.getXOffset() + xScale(x));
    m_localGraphicsState.setYOffset(m_localGraphicsState.getYOffset() + yScale(y));
    m_psGraphicsState.setXOffset(m_psGraphicsState.getXOffset() + xScale(x));
    m_psGraphicsState.setYOffset(m_psGraphicsState.getYOffset() + yScale(y));
  }
  /***** END overridden Graphics methods *****/
  
  /***** START overridden Graphics2D methods *****/
  
  public FontRenderContext getFontRenderContext(){
    return (new FontRenderContext(null,true,true));
  }
  public void clip(Shape s){}
  public Stroke getStroke(){
    return(m_localGraphicsState.getStroke());
  }
  
  public Color getBackground(){
    return(Color.white);
  }
  public void setBackground(Color c){}
  public Composite getComposite(){
    return(AlphaComposite.getInstance(AlphaComposite.SRC));
  }
  public Paint getPaint(){
    return((Paint) (new Color(getColor().getRed(),getColor().getGreen(),getColor().getBlue())));
  }
  public AffineTransform getTransform(){
    return(new AffineTransform());
  }
  public void setTransform(AffineTransform at) {}
  public void transform(AffineTransform at) {}
  public void shear(double d1, double d2){}
  public void scale(double d1, double d2) {
    m_localGraphicsState.setXScale(d1);
    m_localGraphicsState.setYScale(d2);
    if (DEBUG)
      System.err.println("d1 = " + d1 + ", d2 = " + d2);
  }
  public void rotate(double d1, double d2, double d3){}
  public void rotate(double d1){}
  public void translate(double d1, double d2) {}
  public RenderingHints getRenderingHints(){
    return(new RenderingHints(null));
  }
  public void addRenderingHints(Map m){}
  public void setRenderingHints(Map m){}
  public Object getRenderingHint(RenderingHints.Key key){
    return(null);
  }
  public void setRenderingHint(RenderingHints.Key key, Object o){}
  public void setStroke(Stroke s){
    if (s != null){
      m_localGraphicsState.setStroke(s);
      if (s.equals(m_psGraphicsState.getStroke())) {
        return;
      }
      m_psGraphicsState.setStroke(s); 
    } else {
      m_localGraphicsState.setStroke(new BasicStroke());
      m_psGraphicsState.setStroke(getStroke());
    }
    // ouput postscript here to set stroke.
  }
  public void setPaint(Paint p){
  }
  public void setComposite(Composite c){}
  public GraphicsConfiguration getDeviceConfiguration(){
    GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
    GraphicsDevice gd = ge.getDefaultScreenDevice();
    return(gd.getDefaultConfiguration()); 
  }
  public boolean hit(Rectangle r, Shape s, boolean onstroke){
    return(false);
  }
  public void fill(Shape s){}
  public void drawGlyphVector(GlyphVector gv, float f1, float f2){} 
  public void drawString(AttributedCharacterIterator aci, float f1, float f2){}
  public void drawString(String str, float x, float y){
    drawString(str,(int)x, (int)y);
  }
  public void drawRenderableImage(RenderableImage ri, AffineTransform at){}
  public void drawRenderedImage(RenderedImage ri, AffineTransform af){}
  public void drawImage(BufferedImage bi, BufferedImageOp bio, int i1, int i2){}
  public boolean drawImage(Image im, AffineTransform at, ImageObserver io){
    return(false);
  }
  public void draw(Shape s){}
  /***** END *****/
}