8028539: Endless loop in native code of sun.java2d.loops.ScaledBlit
Reviewed-by: flar, jgodinez
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/*
* @test
* @bug 8028539
* @summary Test that drawing a scaled image terminates.
* @run main/othervm/timeout=60 DrawImageCoordsTest
*/
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.geom.AffineTransform;
import java.awt.image.BufferedImage;
public class DrawImageCoordsTest {
public static void main(String[] args) {
/* Create an image to draw, filled in solid red. */
BufferedImage srcImg =
new BufferedImage(200, 200, BufferedImage.TYPE_INT_RGB);
Graphics srcG = srcImg.createGraphics();
srcG.setColor(Color.red);
int w = srcImg.getWidth(null);
int h = srcImg.getHeight(null);
srcG.fillRect(0, 0, w, h);
/* Create a destination image */
BufferedImage dstImage =
new BufferedImage(200, 200, BufferedImage.TYPE_INT_RGB);
Graphics2D dstG = dstImage.createGraphics();
/* draw image under a scaling transform that overflows int */
AffineTransform tx = new AffineTransform(0.5, 0, 0, 0.5,
0, 5.8658460197478485E9);
dstG.setTransform(tx);
dstG.drawImage(srcImg, 0, 0, null );
/* draw image under the same overflowing transform, cancelling
* out the 0.5 scale on the graphics
*/
dstG.drawImage(srcImg, 0, 0, 2*w, 2*h, null);
if (Color.red.getRGB() == dstImage.getRGB(w/2, h/2)) {
throw new RuntimeException("Unexpected color: clipping failed.");
}
System.out.println("Test Thread Completed");
}
}