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/*
* Copyright (c) 2000, 2024, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* 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).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/*
* @test
* @bug 4259548
* @summary tests that MemoryImageSource correctly handles images with offsets
* @library /java/awt/regtesthelpers
* @build PassFailJFrame
* @run main/manual ImageOffsetTest
*/
import java.awt.Frame;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.Panel;
import java.awt.Toolkit;
import java.awt.image.ColorModel;
import java.awt.image.IndexColorModel;
import java.awt.image.MemoryImageSource;
public class ImageOffsetTest {
static int height = 100;
static int width = 100;
static int levels = 3;
static IndexColorModel cm;
static Image image;
static boolean first = true;
static byte[] db = new byte[height * width * levels] ;
private static final String INSTRUCTIONS = """
If on the appeared 'Test frame' all color squares are of one color
test failed, otherwise it's passed.""";
public static void main(String[] args) throws Exception {
PassFailJFrame.builder()
.title("ImageOffsetTest")
.instructions(INSTRUCTIONS)
.rows((int) INSTRUCTIONS.lines().count() + 2)
.columns(35)
.testUI(ImageOffsetTest::createUI)
.build()
.awaitAndCheck();
}
private static Frame createUI() {
Frame frame = new Frame("ImageOffset Frame");
frame.add(new Panel() {
public void paint(Graphics g) {
for ( int i=0 ; i<3 ; i++ ) {
g.drawImage(
generateBuggyImage(i * width * height), 10 + i * 110, 10, null);
}
}
});
frame.setSize(400, 200);
frame.setLocation(300, 200);
createColorModel();
int l = 0;
for (int k = 0; k < levels; k++) {
for (int i = 0; i < height; i++) {
for (int j = 0; j < width; j++) {
if( k == 0) {
db[l] = (byte)(70 & 0xff) ;
}
if (k == 1) {
db[l] = (byte)(150 & 0xff) ;
}
if (k == 2) {
db[l] = (byte)(230 & 0xff) ;
}
l++ ;
}
}
}
return frame;
}
private static void createColorModel() {
byte[] red = new byte[256];
byte[] green = new byte[256];
byte[] blue = new byte[256];
for (int i = 0; i < 256; i++) {
red[i] = (byte)(i & 0xff);
//green[i] = (byte)( i & 0xff ) ;
blue[i] = (byte)( i & 0xff ) ;
//commented out green so I could get purple
}
cm = new IndexColorModel( 8, 256, red, green, blue ) ;
}
private static Image generateBuggyImage(int offset) {
// Initialize the database, Three slices, different shades of grey
// Here the image is created using the offset,
return Toolkit.getDefaultToolkit().createImage(
new MemoryImageSource(width, height, (ColorModel)cm,
db, offset, width));
}
}
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