Ejemplo n.º 1
0
 // Use double buffer to reduce flicker when drawing complex ROIs.
 // Author: Erik Meijering
 void paintDoubleBuffered(Graphics g) {
   final int srcRectWidthMag = (int) (srcRect.width * magnification);
   final int srcRectHeightMag = (int) (srcRect.height * magnification);
   if (offScreenImage == null
       || offScreenWidth != srcRectWidthMag
       || offScreenHeight != srcRectHeightMag) {
     offScreenImage = createImage(srcRectWidthMag, srcRectHeightMag);
     offScreenWidth = srcRectWidthMag;
     offScreenHeight = srcRectHeightMag;
   }
   Roi roi = imp.getRoi();
   try {
     if (imageUpdated) {
       imageUpdated = false;
       imp.updateImage();
     }
     Graphics offScreenGraphics = offScreenImage.getGraphics();
     Java2.setBilinearInterpolation(offScreenGraphics, Prefs.interpolateScaledImages);
     Image img = imp.getImage();
     if (img != null)
       offScreenGraphics.drawImage(
           img,
           0,
           0,
           srcRectWidthMag,
           srcRectHeightMag,
           srcRect.x,
           srcRect.y,
           srcRect.x + srcRect.width,
           srcRect.y + srcRect.height,
           null);
     if (overlay != null) drawOverlay(offScreenGraphics);
     if (showAllROIs) drawAllROIs(offScreenGraphics);
     if (roi != null) drawRoi(roi, offScreenGraphics);
     if (srcRect.width < imageWidth || srcRect.height < imageHeight)
       drawZoomIndicator(offScreenGraphics);
     if (IJ.debugMode) showFrameRate(offScreenGraphics);
     g.drawImage(offScreenImage, 0, 0, null);
   } catch (OutOfMemoryError e) {
     IJ.outOfMemory("Paint");
   }
 }
Ejemplo n.º 2
0
 public void paint(Graphics g) {
   if (histogram != null) {
     if (os == null) {
       os = createImage(WIDTH, HEIGHT);
       osg = os.getGraphics();
       osg.setColor(Color.white);
       osg.fillRect(0, 0, WIDTH, HEIGHT);
       osg.setColor(Color.gray);
       for (int i = 0; i < WIDTH; i++) {
         if (hColors != null) osg.setColor(hColors[i]);
         osg.drawLine(i, HEIGHT, i, HEIGHT - ((int) (HEIGHT * histogram[i]) / hmax) - 4);
       }
       osg.dispose();
     }
     g.drawImage(os, 0, 0, this);
   } else {
     g.setColor(Color.white);
     g.fillRect(0, 0, WIDTH, HEIGHT);
   }
   g.setColor(Color.black);
   g.drawLine(0, HEIGHT - 4, 256, HEIGHT - 4);
   g.drawRect(0, 0, WIDTH, HEIGHT);
   g.drawRect((int) minHue, 1, (int) (maxHue - minHue), HEIGHT - 5);
 }