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/*
* Copyright (c) 2017, 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 8177393
* @summary Verify RescaleOp applied to BufferedImages.
* @run main ImageRescaleOpTest
*/
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import static java.awt.image.BufferedImage.*;
import java.awt.image.RescaleOp;
import java.awt.Color;
import java.io.File;
import java.io.IOException;
import javax.imageio.ImageIO;
public class ImageRescaleOpTest {
int w = 10, h = 10;
float scaleFactor = 0.5f;
float offset = 0.0f;
static boolean saveImage = false;
public static void main(String[] args) throws Exception {
saveImage = args.length > 0;
ImageRescaleOpTest test = new ImageRescaleOpTest();
test.startTest();
}
String getFileName(int s, int d) {
return textFor(s)+"_to_"+textFor(d)+".png";
}
String getMsgText(int s, int d) {
return textFor(s)+"->"+textFor(d)+": ";
}
String textFor(int t) {
switch (t) {
case TYPE_INT_ARGB : return "ARGB";
case TYPE_INT_RGB : return "RGB";
case TYPE_4BYTE_ABGR : return "4BYTEABGR";
case TYPE_3BYTE_BGR : return "3BYTEBGR";
case TYPE_USHORT_555_RGB : return "USHORT_555_RGB";
case TYPE_USHORT_565_RGB : return "USHORT_565_RGB";
case TYPE_USHORT_GRAY : return "USHORT_GRAY";
default : return "OTHER";
}
}
private void startTest() throws Exception {
int expect = 0xff7f7f7f;
runTest(TYPE_INT_RGB, TYPE_INT_RGB, expect);
runTest(TYPE_INT_ARGB, TYPE_INT_ARGB, expect);
runTest(TYPE_INT_ARGB, TYPE_INT_RGB, expect);
runTest(TYPE_INT_RGB, TYPE_INT_ARGB, expect);
runTest(TYPE_3BYTE_BGR, TYPE_3BYTE_BGR, expect);
runTest(TYPE_3BYTE_BGR, TYPE_4BYTE_ABGR, expect);
runTest(TYPE_4BYTE_ABGR, TYPE_3BYTE_BGR, expect);
runTest(TYPE_4BYTE_ABGR, TYPE_4BYTE_ABGR, expect);
/* Slightly different values here due to limited precision */
runTest(TYPE_USHORT_555_RGB, TYPE_USHORT_555_RGB, 0xff7b7b7b);
runTest(TYPE_USHORT_565_RGB, TYPE_USHORT_565_RGB, 0xff7b7d7b);
/* 565->555 and 555->565 results are wrong as the slow code
* path used is not accounting for the difference in the range.
*/
//runTest(TYPE_USHORT_555_RGB, TYPE_USHORT_565_RGB, expect);
//runTest(TYPE_USHORT_565_RGB, TYPE_USHORT_555_RGB, expect);
runTest(TYPE_USHORT_GRAY, TYPE_USHORT_GRAY, 0xffbcbcbc);
}
private void check(BufferedImage bi, int expect, String msg) {
int argb = bi.getRGB(w-1, h-1);
System.out.println(msg + Integer.toHexString(argb));
if (argb != expect) {
throw new RuntimeException(msg +
" expected " + Integer.toHexString(expect) +
" but got " + Integer.toHexString(argb));
}
}
private void runTest(int sType, int dType, int expect) {
BufferedImage src = new BufferedImage(w, h, sType);
BufferedImage dst = new BufferedImage(w, h, dType);
String msg = getMsgText(sType, dType);
Graphics2D g2d = src.createGraphics();
g2d.setColor(Color.WHITE);
g2d.fillRect(0, 0, w, h);
RescaleOp res = new RescaleOp(scaleFactor, offset, null);
res.filter(src, dst);
if (saveImage) {
try {
String fname = getFileName(sType, dType);
ImageIO.write(dst, "png", new File(fname));
} catch (IOException e) {
}
}
check(dst, expect, msg);
}
}
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