/*
* @test @(#)EdgeNoOpCrash.java 1.1 08/10/02
* @bug 6726779
* @summary Test verifies that ConvolveOp with the EDGE_NO_OP edge condition
* does not cause JVM crash if size of source raster elements is
* greather than size of the destination raster element.
*
* @run main EdgeNoOpCrash
*/
import java.awt.Point;
import java.awt.image.ConvolveOp;
import java.awt.image.DataBuffer;
import java.awt.image.ImagingOpException;
import java.awt.image.Kernel;
import java.awt.image.Raster;
import java.awt.image.WritableRaster;
import java.util.Arrays;
public class EdgeNoOpCrash {
private static final int w = 3000;
private static final int h = 200;
public static void main(String[] args) {
crashTest();
}
private static void crashTest() {
Raster src = createSrcRaster();
WritableRaster dst = createDstRaster();
ConvolveOp op = createConvolveOp(ConvolveOp.EDGE_NO_OP);
try {
op.filter(src, dst);
} catch (ImagingOpException e) {
/*
* The test pair of source and destination rasters
* may cause failure of the medialib convolution routine,
* so this exception is expected.
*
* The JVM crash is the only manifestation of this
* test failure.
*/
}
System.out.println("Test PASSED.");
}
private static Raster createSrcRaster() {
WritableRaster r = Raster.createInterleavedRaster(DataBuffer.TYPE_USHORT,
w, h, 4, new Point(0, 0));
return r;
}
private static WritableRaster createDstRaster() {
WritableRaster r = Raster.createInterleavedRaster(DataBuffer.TYPE_BYTE,
w, h, 4, new Point(0, 0));
return r;
}
private static ConvolveOp createConvolveOp(int edgeHint) {
final int kw = 3;
final int kh = 3;
float[] kdata = new float[kw * kh];
float v = 1f / kdata.length;
Arrays.fill(kdata, v);
Kernel k = new Kernel(kw, kh, kdata);
ConvolveOp op = new ConvolveOp(k, edgeHint, null);
return op;
}
}