I'm able to draw a rectangle over a tiff I loaded into my DisplayJAI which
is an extension of a JPanel.
Anyhow, when I draw the rectangle over the image I'd like to draw them in
certain colors for certain operations. My code to draw a rectangle currently
looks something like this:
Graphics2D g2d = tileIm.createGraphics();
g2d.setColor(Color.red);
g2d.drawRect(Math.min(start_x,xor_x),Math.min(start_y,xor_y),
Math.abs(start_x-xor_x),Math.abs(start_y-xor_y));
xor_x = curr_x;
xor_y = curr_y;
g2d.drawRect(Math.min(start_x,xor_x),Math.min(start_y,xor_y),
Math.abs(start_x-xor_x),Math.abs(start_y-xor_y));
displayJAI.set(tileIm);
However, the rectangle is ALWAYS drawn in black. Does this have soemthing to
do with drawing on a tiff image? Any Ideas?
FYI here is how I'm loading my image into the DisplayJAI:
ParameterBlock params = new ParameterBlock();
params.addSource(image0);
params.add(scaleFactorX);
params.add(scaleFactorY);
params.add(1.0F); // x translate
params.add(1.0F); // y translate
params.add(interp); // interpolation method
/* Create an operator to scale image1. */
RenderedOp image2 = JAI.create("scale", params);
PlanarImage ren1 = image2.createInstance();
SampleModel sampleModel1 =
ren1.getSampleModel().createCompatibleSampleModel(image2.getWidth(),image2.getHeight());
tileIm = new TiledImage(ren1.getMinX(),ren1.getMinY(), ren1.getWidth(),
ren1.getHeight(), ren1.getTileGridXOffset(),
ren1.getTileGridYOffset(),
sampleModel1, ren1.getColorModel());
tileIm.set(image2);
Sorry for the long winded explanation!
Thanks!
-Sundhar
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