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* FITNESS FOR A PARTICULAR PURPOSE . See the GNU General Public License
* version 2 for more details ( a copy is included in the LICENSE file that
* accompanied this code ) .
*
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* 2 along with this work ; if not , write to the Free Software Foundation ,
* Inc . , 51 Franklin St , Fifth Floor , Boston , MA 02110 - 1301 USA .
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import java.awt.*;
import java.awt.image.*;
import java.util.*;
import javax.swing.*;
/**
* @ test
* @ key headful
* @ bug 8024895
* @ summary tests if changing extra alpha values are honored for transformed blits
* @ author ceisserer
*/
public class EABlitTest extends Frame {
protected void test() {
BufferedImage srcImg = createSrcImage();
Image dstImg = getGraphicsConfiguration().createCompatibleVolatileImage(20 , 50 );
//be over-cautious and render twice to avoid BI caching issues
renderToVI(srcImg, dstImg);
renderToVI(srcImg, dstImg);
BufferedImage validationImg = new BufferedImage(20 , 50 , BufferedImage.TYPE_INT_RGB);
Graphics2D valG = (Graphics2D) validationImg.getGraphics();
valG.drawImage(dstImg, 0 , 0 , null );
//Loop over all pixel, and count the different pixel values encountered.
TreeSet<Integer> colorCntSet = new TreeSet<>();
for (int x=0 ; x < validationImg.getWidth(); x++) {
for (int y=0 ; y < validationImg.getHeight(); y++) {
int rgb = validationImg.getRGB(x, y);
colorCntSet.add(rgb);
}
}
//Check if we encountered 3 different color values in total
if (colorCntSet.size() == 3 ) {
System.out.println("Passed!" );
} else {
throw new RuntimeException("Test FAILED!" );
}
}
protected void renderToVI(BufferedImage src, Image dst) {
Graphics2D g = (Graphics2D) dst.getGraphics();
g.setColor(Color.WHITE);
g.fillRect(0 , 0 , 50 , 50 );
g.rotate(0 .5 f);
g.setRenderingHint(RenderingHints.KEY_RENDERING,
RenderingHints.VALUE_RENDER_QUALITY);
g.setComposite(AlphaComposite.SrcOver.derive(1 f));
g.drawImage(src, 10 , 10 , null );
g.setComposite(AlphaComposite.SrcOver.derive(0 .5 f));
g.drawImage(src, 20 , 20 , null );
}
protected BufferedImage createSrcImage() {
BufferedImage bi = new BufferedImage(10 , 10 , BufferedImage.TYPE_INT_RGB);
Graphics2D g = (Graphics2D) bi.getGraphics();
g.setColor(Color.YELLOW);
g.fillRect(0 , 0 , 10 , 10 );
return bi;
}
public static void main(String[] args) {
new EABlitTest().test();
}
}
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