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/*
* Copyright (c) 1999, 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 4192756
* @summary Tests that using a non-default colormodel generates correct images under 16/24 bit mode
*/
import java.awt.Color;
import java.awt.Component;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.image.BufferedImage;
import java.awt.image.ColorModel;
import java.awt.image.DirectColorModel;
import java.awt.image.ComponentColorModel;
import java.awt.image.MemoryImageSource;
import java.util.Arrays;
/*
* NOTE: This bug only appears under specific conditions. If the background of
* the surface is red, then you are not running under the conditions necessary
* to test for the regression so the results of this test will be inconclusive.
*
* The test should be run under any of the following screen depths/surfaces:
*
* 15-bit, otherwise known as 555 RGB or 32768 (thousands) colors
* 16-bit, otherwise known as 565 RGB or 65536 (thousands) colors
* 24-bit, otherwise known as 16777216 (millions) colors
*
* The test draws 2 rectangles. Both rectangles should be half black (left)
* and half blue (right). If the top rectangle is all black, the test fails.
* If the background is red, the results are inconclusive (see above).
*/
public class CustomSourceCM extends Component {
public static int IMG_W = 80;
public static int IMG_H = 30;
static void test(int imageType) {
int w = IMG_W + 20;
int h = IMG_H * 2 + 40;
BufferedImage bi = new BufferedImage(w, h, imageType);
DirectColorModel dcm;
/* the next dozen lines or so are intended to help
* ascertain if the destination surface is of the type
* that exhibited the original bug, making the background
* white in those cases. It is not strictly necessary.
* It is only for a manual tester to be able to tell by looking.
* The real test is the check for black and blue later on.
*/
Graphics2D g = bi.createGraphics();
g.setColor(Color.red);
g.fillRect(0, 0, w, h);
ColorModel cm = bi.getColorModel();
if (cm instanceof ComponentColorModel) {
g.setColor(Color.white);
g.fillRect(0, 0, w, h);
} else if (cm instanceof DirectColorModel) {
dcm = (DirectColorModel) cm;
if (dcm.getPixelSize() < 24) {
g.setColor(Color.white);
g.fillRect(0, 0, w, h);
}
}
// Construct a ColorModel and data for a 16-bit 565 image...
dcm = new DirectColorModel(16, 0x1f, 0x7e0, 0xf800);
// Create an image which is black on the left, blue on the right.
int[] pixels = new int[IMG_W * IMG_H];
int blue = dcm.getBlueMask();
int off = 0;
for (int y = 0; y < IMG_H; y++) {
Arrays.fill(pixels, off, off+IMG_W/2, 0);
Arrays.fill(pixels, off+IMG_W/2, off+IMG_W, blue);
off += IMG_W;
}
MemoryImageSource mis = new MemoryImageSource(IMG_W, IMG_H, dcm,
pixels, 0, IMG_W);
CustomSourceCM comp = new CustomSourceCM();
Image img = comp.createImage(mis);
// Draw the image on to the surface.
g.drawImage(img, 10, 10, null);
// Create a similar effect with 2 fillrects, below the image.
g.setColor(Color.black);
g.fillRect(10, 60, IMG_W/2, IMG_H);
g.setColor(Color.blue);
g.fillRect(10+IMG_W/2, 60, IMG_W/2, IMG_H);
// Now sample points in the image to confirm they are the expected color.
int bluePix = Color.blue.getRGB();
int blackPix = Color.black.getRGB();
int black_topLeft = bi.getRGB(10+IMG_W/4, 10+IMG_H/2);
int blue_topRight = bi.getRGB(10+IMG_W*3/4, 10+IMG_H/2);
int black_bottomLeft = bi.getRGB(10+IMG_W/4, 60+IMG_H/2);
int blue_bottomRight = bi.getRGB(10+IMG_W*3/4, 60+IMG_H/2);
if ((black_topLeft != blackPix) || (black_bottomLeft != blackPix) ||
(blue_topRight != bluePix) || (blue_bottomRight != bluePix)) {
String fileName = "failed " + imageType + ".png";
try {
javax.imageio.ImageIO.write(bi, "png", new java.io.File(fileName));
} catch (Exception e) { };
throw new RuntimeException("unexpected colors");
}
}
public static void main(String argv[]) {
test(BufferedImage.TYPE_USHORT_555_RGB);
test(BufferedImage.TYPE_USHORT_565_RGB);
test(BufferedImage.TYPE_3BYTE_BGR);
}
}
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