gdkgraphics2d.java

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	catch (java.awt.geom.NoninvertibleTransformException e)
	  {
	  }
      }
  }

  public void rotate(double theta)
  {
    transform(AffineTransform.getRotateInstance(theta));
  }

  public void rotate(double theta, double x, double y)
  {
    transform(AffineTransform.getRotateInstance(theta, x, y));
  }

  public void scale(double sx, double sy)
  {
    transform(AffineTransform.getScaleInstance(sx, sy));
  }

  public void translate(double tx, double ty)
  {
    transform(AffineTransform.getTranslateInstance(tx, ty));
  }

  public void translate(int x, int y)
  {
    translate((double) x, (double) y);
  }

  public void shear(double shearX, double shearY)
  {
    transform(AffineTransform.getShearInstance(shearX, shearY));
  }

  public Stroke getStroke()
  {
    return stroke;
  }

  public void setStroke(Stroke st)
  {
    stroke = st;
    if (stroke instanceof BasicStroke)
      {
	BasicStroke bs = (BasicStroke) stroke;
	cairoSetLineCap(bs.getEndCap());
	cairoSetLineWidth(bs.getLineWidth());
	cairoSetLineJoin(bs.getLineJoin());
	cairoSetMiterLimit(bs.getMiterLimit());
	float[] dashes = bs.getDashArray();
	if (dashes != null)
	  {
	    double[] double_dashes = new double[dashes.length];
	    for (int i = 0; i < dashes.length; i++)
	      double_dashes[i] = dashes[i];
	    cairoSetDash(double_dashes, double_dashes.length,
	                 (double) bs.getDashPhase());
	  }
	else
	  cairoSetDash(new double[0], 0, 0.0);
      }
  }

  public void setStrokeUnlocked(Stroke st)
  {
    stroke = st;
    if (stroke instanceof BasicStroke)
      {
	BasicStroke bs = (BasicStroke) stroke;
	cairoSetLineCapUnlocked(bs.getEndCap());
	cairoSetLineWidthUnlocked(bs.getLineWidth());
	cairoSetLineJoinUnlocked(bs.getLineJoin());
	cairoSetMiterLimitUnlocked(bs.getMiterLimit());
	float[] dashes = bs.getDashArray();
	if (dashes != null)
	  {
	    double[] double_dashes = new double[dashes.length];
	    for (int i = 0; i < dashes.length; i++)
	      double_dashes[i] = dashes[i];
	    cairoSetDashUnlocked(double_dashes, double_dashes.length,
                                 (double) bs.getDashPhase());
	  }
	else
	  cairoSetDashUnlocked(new double[0], 0, 0.0);
      }
  }

  ////////////////////////////////////////////////
  ////// Implementation of Graphics Methods //////
  ////////////////////////////////////////////////

  public void setPaintMode()
  {
    setComposite(java.awt.AlphaComposite.SrcOver);
  }

  public void setXORMode(Color c)
  {
    setComposite(new gnu.java.awt.BitwiseXORComposite(c));
  }

  public void setColor(Color c)
  {
    if (c == null)
      c = Color.BLACK;

    fg = c;
    paint = c;
    cairoSetRGBAColor(fg.getRed() / 255.0, fg.getGreen() / 255.0,
                      fg.getBlue() / 255.0, fg.getAlpha() / 255.0);
  }

  public void setColorUnlocked(Color c)
  {
    if (c == null)
      c = Color.BLACK;

    fg = c;
    paint = c;
    cairoSetRGBAColorUnlocked(fg.getRed() / 255.0, fg.getGreen() / 255.0,
                      fg.getBlue() / 255.0, fg.getAlpha() / 255.0);
  }

  public Color getColor()
  {
    return fg;
  }

  public Color getColorUnlocked()
  {
    return getColor();
  }

  public void clipRect(int x, int y, int width, int height)
  {
    clip(new Rectangle(x, y, width, height));
  }

  public Shape getClip()
  {
    if (clip == null)
      return null;
    else
      return clip.getBounds2D(); //getClipInDevSpace();
  }

  public Rectangle getClipBounds()
  {
    if (clip == null)
      return null;
    else
      return clip.getBounds();
  }

  protected Rectangle2D getClipInDevSpace()
  {
    Rectangle2D uclip = clip.getBounds2D();
    if (transform == null)
      return uclip;
    else
      {
	Point2D pos = transform.transform(new Point2D.Double(uclip.getX(),
	                                                     uclip.getY()),
	                                  (Point2D) null);
	Point2D extent = transform.deltaTransform(new Point2D.Double(uclip
	                                                             .getWidth(),
	                                                             uclip
	                                                             .getHeight()),
	                                          (Point2D) null);
	return new Rectangle2D.Double(pos.getX(), pos.getY(), extent.getX(),
	                              extent.getY());
      }
  }

  public void setClip(int x, int y, int width, int height)
  {
    setClip(new Rectangle2D.Double((double) x, (double) y, (double) width,
                                   (double) height));
  }

  public void setClip(Shape s)
  {
    clip = s;
    if (clip == null)
      {
	// Reset clipping.
        if (component != null)
          {
            Dimension d = component.awtComponent.getSize();
            setClip(0, 0, d.width, d.height);
          }
      }
    else
      {
	cairoNewPath();
	if (s instanceof Rectangle2D)
	  {
	    Rectangle2D r = (Rectangle2D) s;
	    cairoRectangle(r.getX(), r.getY(), r.getWidth(), r.getHeight());
	  }
	else
	  walkPath(s.getPathIterator(null), false);

	// cairoClosePath ();
	cairoClip();
      }
  }

  private static BasicStroke draw3DRectStroke = new BasicStroke();

  public void draw3DRect(int x, int y, int width, int height, boolean raised)
  {
    Stroke tmp = stroke;
    setStroke(draw3DRectStroke);
    super.draw3DRect(x, y, width, height, raised);
    setStroke(tmp);
    updateBufferedImage();
  }

  public void fill3DRect(int x, int y, int width, int height, boolean raised)
  {
    Stroke tmp = stroke;
    setStroke(draw3DRectStroke);
    super.fill3DRect(x, y, width, height, raised);
    setStroke(tmp);
    updateBufferedImage();
  }

  public void drawRect(int x, int y, int width, int height)
  {
    draw(new Rectangle(x, y, width, height));
  }

  public void fillRect(int x, int y, int width, int height)
  {
    cairoNewPath();
    cairoRectangle(x, y, width, height);
    cairoFill();
  }

  public void clearRect(int x, int y, int width, int height)
  {
    if (bg != null)
      cairoSetRGBAColor(bg.getRed() / 255.0, bg.getGreen() / 255.0,
			bg.getBlue() / 255.0, 1.0);
    cairoNewPath();
    cairoRectangle(x, y, width, height);
    cairoFill();
    setColor(fg);

    updateBufferedImage();
  }

  public void setBackground(Color c)
  {
    if (c == null)
      c = Color.WHITE;
    bg = c;
  }

  public void setBackgroundUnlocked(Color c)
  {
    setBackground(c);
  }

  public Color getBackground()
  {
    return bg;
  }

  private void doPolygon(int[] xPoints, int[] yPoints, int nPoints,
                         boolean close, boolean fill)
  {
    if (nPoints < 1)
      return;
    GeneralPath gp = new GeneralPath(PathIterator.WIND_EVEN_ODD);
    gp.moveTo((float) xPoints[0], (float) yPoints[0]);
    for (int i = 1; i < nPoints; i++)
      gp.lineTo((float) xPoints[i], (float) yPoints[i]);

    if (close)
      gp.closePath();

    Shape sh = gp;
    if (fill == false && stroke != null && ! (stroke instanceof BasicStroke))
      {
	sh = stroke.createStrokedShape(gp);
	fill = true;
      }

    if (fill)
      fill(sh);
    else
      draw(sh);
  }

  public void drawLine(int x1, int y1, int x2, int y2)
  {
    int[] xp = new int[2];
    int[] yp = new int[2];

    xp[0] = x1;
    xp[1] = x2;
    yp[0] = y1;
    yp[1] = y2;

    doPolygon(xp, yp, 2, false, false);
  }

  public void fillPolygon(int[] xPoints, int[] yPoints, int nPoints)
  {
    doPolygon(xPoints, yPoints, nPoints, true, true);
  }

  public void drawPolygon(int[] xPoints, int[] yPoints, int nPoints)
  {
    doPolygon(xPoints, yPoints, nPoints, true, false);
  }

  public void drawPolyline(int[] xPoints, int[] yPoints, int nPoints)
  {
    doPolygon(xPoints, yPoints, nPoints, false, false);
  }

  private boolean drawRaster(ColorModel cm, Raster r,
                             AffineTransform imageToUser, Color bgcolor)
  {
    if (r == null)
      return false;

    SampleModel sm = r.getSampleModel();
    DataBuffer db = r.getDataBuffer();

    if (db == null || sm == null)
      return false;

    if (cm == null)
      cm = ColorModel.getRGBdefault();

    double[] i2u = new double[6];
    if (imageToUser != null)
      imageToUser.getMatrix(i2u);
    else
      {
	i2u[0] = 1;
	i2u[1] = 0;
	i2u[2] = 0;
	i2u[3] = 1;
	i2u[4] = 0;
	i2u[5] = 0;
      }

    int[] pixels = findSimpleIntegerArray(cm, r);

    if (pixels == null)
      {
	// FIXME: I don't think this code will work correctly with a non-RGB
	// MultiPixelPackedSampleModel. Although this entire method should 
	// probably be rewritten to better utilize Cairo's different supported
	// data formats.
	if (sm instanceof MultiPixelPackedSampleModel)
	  {
	    pixels = r.getPixels(0, 0, r.getWidth(), r.getHeight(), pixels);
	    for (int i = 0; i < pixels.length; i++)
	      pixels[i] = cm.getRGB(pixels[i]);
	  }
	else
	  {
	    pixels = new int[r.getWidth() * r.getHeight()];
	    for (int i = 0; i < pixels.length; i++)
	      pixels[i] = cm.getRGB(db.getElem(i));
	  }
      }

    // Change all transparent pixels in the image to the specified bgcolor,
    // or (if there's no alpha) fill in an alpha channel so that it paints
    // correctly.
    if (cm.hasAlpha())
      {
	if (bgcolor != null && cm.hasAlpha())
	  for (int i = 0; i < pixels.length; i++)
	    {
	      if (cm.getAlpha(pixels[i]) == 0)
		pixels[i] = bgcolor.getRGB();
	    }
      }
    else
      for (int i = 0; i < pixels.length; i++)
	pixels[i] |= 0xFF000000;

    drawPixels(pixels, r.getWidth(), r.getHeight(), r.getWidth(), i2u);

    updateBufferedImage();

    return true;
  }

  public void drawRenderedImage(RenderedImage image, AffineTransform xform)
  {
    drawRaster(image.getColorModel(), image.getData(), xform, bg);
  }

  public void drawRenderableImage(RenderableImage image, AffineTransform xform)
  {
    drawRenderedImage(image.createRendering(new RenderContext(xform)), xform);
  }

  public boolean drawImage(Image img, AffineTransform xform, ImageObserver obs)
  {
    return drawImage(img, xform, bg, obs);
  }

  public void drawImage(BufferedImage image, BufferedImageOp op, int x, int y)
  {
    Image filtered = op.filter(image, null);
    drawImage(filtered, new AffineTransform(1f, 0f, 0f, 1f, x, y), bg, null);