TrakEM2_/src/main/java/ini/trakem2/display/paint/USHORTPaintContext.java

   1 package ini.trakem2.display.paint;
   2
   3 import java.awt.PaintContext;
   4 import java.awt.image.ColorModel;
   5 import java.awt.image.ComponentColorModel;
   6 import java.awt.image.Raster;
   7 import java.awt.image.WritableRaster;
   8
   9 final class USHORTPaintContext implements PaintContext
  10 {
  11         private final ComponentColorModel ccm;
  12
  13         private WritableRaster raster;
  14         private final short[] value;
  15
  16         USHORTPaintContext(final ComponentColorModel ccm, final short[] value) {
  17                 this.value = value;
  18                 this.ccm = ccm;
  19         }
  20
  21         @Override
  22         public final Raster getRaster(final int x, final int y, final int w, final int h) {
  23                 if (null == raster || raster.getWidth() != w || raster.getHeight() != h) {
  24                         raster = ccm.createCompatibleWritableRaster(w, h);
  25                 }
  26                 final int lenY = y+h;
  27                 final int lenX = x+w;
  28                 for (int j=y; j<lenY; ++j) {
  29                         for (int i=x; i<lenX; ++i) {
  30                                 raster.setDataElements(i-x, j-y, value);
  31                         }
  32                 }
  33                 return raster;
  34         }
  35
  36         @Override
  37         public final ColorModel getColorModel() {
  38                 return ccm;
  39         }
  40
  41         @Override
  42         public final void dispose() {
  43                 raster = null;
  44         }
  45 }