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1 files changed, 427 insertions, 0 deletions

diff --git a/libjava/gnu/awt/j2d/IntegerGraphicsState.java b/libjava/gnu/awt/j2d/IntegerGraphicsState.java
new file mode 100644
index 000000000..bcfacd008
--- /dev/null
+++ b/libjava/gnu/awt/j2d/IntegerGraphicsState.java
@@ -0,0 +1,427 @@
+/* Copyright (C) 2000, 2003  Free Software Foundation
+
+   This file is part of libgcj.
+
+This software is copyrighted work licensed under the terms of the
+Libgcj License.  Please consult the file "LIBGCJ_LICENSE" for
+details.  */
+
+package gnu.awt.j2d;
+
+import java.awt.Color;
+import java.awt.Image;
+import java.awt.Shape;
+import java.awt.Rectangle;
+import java.awt.Graphics;
+import java.awt.Graphics2D;
+import java.awt.GraphicsConfiguration;
+import java.awt.Font;
+import java.awt.FontMetrics;
+import java.awt.image.BufferedImage;
+import java.awt.image.ImageObserver;
+import java.awt.image.Raster;
+import java.awt.image.WritableRaster;
+import java.awt.image.ColorModel;
+
+/**
+ * IntegerGraphicsState is one of several graphics state
+ * implementations.  This graphics state is used when the graphics
+ * object has simple properties, (coordinate translation only, no
+ * transform) and the backend supports integer coordinates (pixel
+ * based). For primitive paint operations, this object translates the
+ * coordinates and forwards the request to the backend. For requests
+ * to draw arbitrary shapes and paths, this object translates the
+ * requests to primitive drawing operations supported by the
+ * backend. IntegerGraphicsState is meant to support the most common
+ * state of an graphics object. The degree of functionality is roughly
+ * equivalent with the old java.awt.Graphics API.
+ */
+public class IntegerGraphicsState extends AbstractGraphicsState
+{
+  int tx;
+  int ty;
+  
+  DirectRasterGraphics directGfx;
+  Shape clip;
+  
+  /** Interface for images which are coupled to a GraphicsConfiguration,
+   * as is typically the case for an off-screen buffer used in
+   * double-buffering.  Any image which implements this interface is
+   * rendered directly by DirectRasterGraphics (i.e. by directGfx.drawImage)
+   */
+  public interface ScreenCoupledImage
+  {
+    /** Get the GraphicsConfiguration to which this image is coupled
+     * @return the GraphicsConfiguration
+     */
+    GraphicsConfiguration getGraphicsConfiguration ();
+  }
+  
+  public IntegerGraphicsState(DirectRasterGraphics directGfx)
+  {
+    this.directGfx = directGfx;
+  }
+  
+  public Object clone()
+  {
+    IntegerGraphicsState clone = (IntegerGraphicsState) super.clone();
+    clone.directGfx = (DirectRasterGraphics) directGfx.clone();
+    
+    return clone;
+  }
+
+  public void dispose()
+  {
+    DirectRasterGraphics lDeviceGfx = directGfx;
+    
+    directGfx = null;
+    
+    if (lDeviceGfx != null)
+      lDeviceGfx.dispose();
+    
+    super.dispose();
+  }
+  
+  // -------- Graphics methods:
+  
+  public void setColor(Color color)
+  {
+    directGfx.setColor(color);
+  }
+  
+  public void setPaintMode()
+  {
+    directGfx.setPaintMode();
+  }
+
+  public void setXORMode(Color altColor)
+  {
+    directGfx.setXORMode(altColor);
+  }
+  
+  public void setFont(Font font)
+  {
+    directGfx.setFont(font);
+  }
+  
+  public FontMetrics getFontMetrics(Font font)
+  {
+    return directGfx.getFontMetrics(font);
+  }
+
+  public void setClip(Shape clip)
+  {
+    if (clip instanceof Rectangle)
+      {
+	Rectangle clipRect = (Rectangle) ((Rectangle) clip).clone();
+	clipRect.x += tx;
+	clipRect.y += ty;
+	
+	this.clip = clipRect;
+	
+	directGfx.setClip(clipRect);
+	return;
+      }
+    
+    String msg =
+      "translating clip shape " + clip + " into device " +
+      "coordinate space has not been implemented yet";
+    
+    throw new UnsupportedOperationException(msg);
+  }
+
+  public Shape getClip()
+  {
+    if (clip == null)
+      return null;
+    if (clip instanceof Rectangle)
+      {
+	Rectangle clipRect = (Rectangle) ((Rectangle) clip).clone();
+	clipRect.x -= tx;
+	clipRect.y -= ty;
+	return clipRect;
+      }
+
+    String msg =
+      "translating clip shape " + clip + " into user " +
+      "coordinate space has not been implemented yet";
+    
+    throw new UnsupportedOperationException(msg);
+  }
+
+  public Rectangle getClipBounds()
+  {
+    if (clip == null)
+      return null;
+    Rectangle clipRect = clip.getBounds();
+    
+    clipRect.x -= tx;
+    clipRect.y -= ty;
+    return clipRect;
+  }
+
+  public void copyArea(int x, int y, 
+		       int width, int height,
+		       int dx, int dy)
+  {
+    directGfx.copyArea(x+tx, y+ty, width, height, dx, dy);
+  }
+
+  public void drawLine(int x1, int y1,
+		       int x2, int y2)
+  {
+    directGfx.drawLine(x1+tx, y1+ty, x2+tx, y2+ty);
+  }
+    
+  public void fillRect(int x, int y,
+		       int width, int height)
+  {
+    directGfx.fillRect(x+tx, y+ty, width, height);
+  }
+    
+  public void clearRect(int x, int y,
+			int width, int height)
+  {
+    directGfx.setColor(frontend.getBackground());
+    directGfx.fillRect(x+tx, y+ty, width, height);
+    directGfx.setColor(frontend.getColor());
+  }
+
+  public void drawRoundRect(int x, int y,
+			    int width, int height,
+			    int arcWidth, int arcHeight)
+  {
+    throw new UnsupportedOperationException("not implemented yet");
+  }
+  
+  public void fillRoundRect(int x, int y,
+			    int width, int height,
+			    int arcWidth, int arcHeight)
+  {
+    throw new UnsupportedOperationException("not implemented yet");
+  }
+
+  public void drawOval(int x, int y,
+		       int width, int height)
+  {
+    drawArc (x, y, width, height, 0, 360);
+  }
+  
+  public void fillOval(int x, int y,
+		       int width, int height)
+  {
+    fillArc (x, y, width, height, 0, 360);
+  }
+
+  public void drawArc(int x, int y,
+		      int width, int height,
+		      int startAngle, int arcAngle)
+  {
+    directGfx.drawArc(x+tx, y+ty, width, height, startAngle, arcAngle);
+  }    
+
+  public void fillArc(int x, int y,
+		      int width, int height,
+		      int startAngle, int arcAngle)
+  {
+    directGfx.fillArc(x+tx, y+ty, width, height, startAngle, arcAngle);
+  }
+  
+  public void drawPolyline(int[] xPoints, int[] yPoints, int nPoints)
+  {
+    if ((tx == 0) && (ty == 0))
+      {
+	directGfx.drawPolyline(xPoints, yPoints, nPoints);
+	return;
+      }
+	    
+    throw new UnsupportedOperationException("translate not implemented");
+  }
+
+  public void drawPolygon(int[] xPoints, int[] yPoints, int nPoints)
+  {
+    if ((tx == 0) && (ty == 0))
+      {
+	directGfx.drawPolygon(xPoints, yPoints, nPoints);
+	return;
+      }
+
+    throw new UnsupportedOperationException("translate not implemented");
+  }
+  
+  public void fillPolygon (int[] xPoints, int[] yPoints, int nPoints)
+  {
+    // FIXME: remove tx & ty args once translation via AffineTransform
+    // is implemented.
+    directGfx.fillPolygon (xPoints, yPoints, nPoints, tx, ty);
+  }
+
+  public boolean drawImage(Image image, int x, int y,
+			   ImageObserver observer)
+  {
+    x += tx;
+    y += ty;
+    
+    if (image instanceof ScreenCoupledImage)
+    {
+      GraphicsConfiguration config
+        = ((ScreenCoupledImage)image).getGraphicsConfiguration ();
+      if (config == frontend.config)
+        return directGfx.drawImage (image, x, y, observer);
+    }
+    if (image instanceof BufferedImage)
+    {
+      BufferedImage bImage = (BufferedImage) image;
+      // FIXME: eliminate? ScreenCoupledImage is probably more efficient
+      Object config = bImage.getProperty ("java.awt.GraphicsConfiguration");
+      if (config == frontend.config)
+        return directGfx.drawImage (image, x, y, observer);
+      
+      int width = image.getWidth (null);
+      int height = image.getHeight (null);
+      
+      Rectangle bounds = new Rectangle (x, y, width, height);
+      
+      MappedRaster mr = directGfx.mapRaster (bounds);
+      
+      // manipulate raster here...
+      ColorModel colorModel = mr.getColorModel ();
+      WritableRaster raster = mr.getRaster ();
+      
+      int xEnd = x + width;
+      int yEnd = y + height;
+      
+      // FIXME: Use the following code only as a fallback. It's SLOW!
+      
+      Object rgbElem = null;
+      for (int yy=0; yy<height; yy++)
+      {
+        for (int xx=0; xx<width; xx++)
+        {
+          int srgb = bImage.getRGB (xx, yy);
+          int sa = ((srgb >>> 24) & 0xff) + 1;
+          int sr = ((srgb >>> 16) & 0xff) + 1;
+          int sg = ((srgb >>> 8) & 0xff) + 1;
+          int sb = (srgb & 0xff) + 1;
+          
+          rgbElem = raster.getDataElements (xx+x, yy+y, rgbElem);
+          int drgb = colorModel.getRGB (rgbElem);
+          int dr = ((drgb >>> 16) & 0xff) + 1;
+          int dg = ((drgb >>> 8) & 0xff) + 1;
+          int db = (drgb & 0xff) + 1;
+          int da = 256 - sa;
+          
+          dr = ((sr*sa + dr*da) >>> 8) - 1;
+          dg = ((sg*sa + dg*da) >>> 8) - 1;
+          db = ((sb*sa + db*da) >>> 8) - 1;
+          
+          drgb = (dr<<16) | (dg<<8) | db;
+          
+          rgbElem = colorModel.getDataElements (drgb, rgbElem);
+          
+          raster.setDataElements (xx+x, yy+y, rgbElem);
+        }
+      }
+      directGfx.unmapRaster (mr);
+      return true;
+      
+    }
+    throw new UnsupportedOperationException ("drawing image " + image +
+    "not implemented");
+  }
+  
+
+  // -------- Graphics2D methods:
+  
+  public void draw(Shape shape)
+  {
+    if (shape instanceof Rectangle)
+      {
+	Rectangle rect = (Rectangle) shape;
+	directGfx.drawRect(rect.x+tx, rect.y+ty, rect.width, rect.height);
+	return;
+      } 
+    
+    throw new UnsupportedOperationException("shape not implemented");
+  }
+
+  public void fill(Shape shape)
+  {
+    if (shape instanceof Rectangle)
+      {
+	Rectangle rect = (Rectangle) shape;
+	directGfx.fillRect(rect.x+tx, rect.y+ty, rect.width, rect.height);
+	return;
+      }
+    
+    throw new UnsupportedOperationException("not implemented");
+  }
+    
+  public boolean hit(Rectangle rect, Shape text,
+		     boolean onStroke)
+  {
+    throw new UnsupportedOperationException("not implemented");
+  }
+
+  public void drawString(String text, int x, int y)
+  {
+    directGfx.drawString(text, x+tx, y+ty);
+  }
+
+  public void drawString(String text, float x, float y)
+  {
+    drawString(text, (int) x, (int) y);
+  }
+  
+  public void translate(int x, int y)
+  {
+    tx += x;
+    ty += y;
+  }
+    
+  public void translate(double tx, double ty)
+  {
+    if ((tx == 0) && (ty == 0))
+      return;
+    
+    needAffineTransform();
+  }
+
+  public void rotate(double theta)
+  {
+    if (theta == 0)
+      return;
+    
+    needAffineTransform();
+  }
+
+  public void rotate(double theta, double x, double y)
+  {
+    if (theta == 0)
+      return;
+    
+    needAffineTransform();
+  }
+
+  public void scale(double scaleX, double scaleY)
+  {
+    if ((scaleX == 1) && (scaleY == 1))
+      return;
+
+    needAffineTransform();
+  }
+  
+  public void shear(double shearX, double shearY)
+  {
+    if ((shearX == 0) && (shearY == 0))
+      return;
+    
+    needAffineTransform();
+  }   
+  
+  private void needAffineTransform()
+  {
+    throw new UnsupportedOperationException("state with affine " +
+					    "transform not implemented");
+  }
+}