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/*
* Copyright (c) 2023, 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.
*/
import java.awt.Point;
import java.awt.Transparency;
import java.awt.color.ColorSpace;
import java.awt.image.BandedSampleModel;
import java.awt.image.BufferedImage;
import java.awt.image.ComponentColorModel;
import java.awt.image.DataBuffer;
import java.awt.image.DataBufferByte;
import java.awt.image.DataBufferFloat;
import java.awt.image.DataBufferInt;
import java.awt.image.Raster;
import java.awt.image.WritableRaster;
import java.util.Arrays;
/**
* @test
* @author Martin Desruisseaux
*/
public final class SetData {
private static final int WIDTH = 3, HEIGHT = 2;
private static final int TRANSLATE_X = -2, TRANSLATE_Y = -3;
public static void main(final String[] args) {
testWithIntegers();
testWithFloats();
testTranslatedSource();
}
private static void testWithIntegers() {
var data = new int[] {4, 8, 2, 7, 9, 1};
var empty = new DataBufferInt(WIDTH*HEIGHT);
var buffer = new DataBufferInt(data, WIDTH*HEIGHT);
buffer = (DataBufferInt) writeAndRead(buffer, empty);
if (!Arrays.equals(data, buffer.getData())) {
throw new AssertionError("Pixel values are not equal.");
}
}
private static void testWithFloats() {
var data = new float[] {0.4f, 0.8f, 0.2f, 0.7f, 0.9f, 0.1f};
var empty = new DataBufferFloat(WIDTH*HEIGHT);
var buffer = new DataBufferFloat(data, WIDTH*HEIGHT);
buffer = (DataBufferFloat) writeAndRead(buffer, empty);
if (!Arrays.equals(data, buffer.getData())) {
throw new AssertionError("Pixel values are not equal.");
}
}
private static DataBuffer writeAndRead(DataBuffer buffer, DataBuffer empty) {
/*
* Prepare an image with all pixels initialized to zero.
*/
var dt = buffer.getDataType();
var cs = ColorSpace.getInstance(ColorSpace.CS_GRAY);
var cm = new ComponentColorModel(cs, false, false, Transparency.OPAQUE, dt);
var sm = new BandedSampleModel(dt, WIDTH, HEIGHT, 1);
var wr = Raster.createWritableRaster(sm, empty, null);
var im = new BufferedImage(cm, wr, false, null);
/*
* Write data provided by the data buffer.
*/
wr = Raster.createWritableRaster(sm, buffer, null);
im.setData(wr);
return im.getRaster().getDataBuffer();
}
private static void testTranslatedSource() {
var source = WritableRaster.createBandedRaster(
DataBuffer.TYPE_BYTE,
WIDTH - TRANSLATE_X + 2,
HEIGHT - TRANSLATE_Y + 1, 1,
new Point(TRANSLATE_X, TRANSLATE_Y));
for (int y=0; y<HEIGHT; y++) {
for (int x=0; x<WIDTH; x++) {
source.setSample(x, y, 0, (y+1)*10 + (x+1));
}
}
var expected = new byte[] {
11, 12, 13,
21, 22, 23
};
var im = new BufferedImage(WIDTH, HEIGHT, BufferedImage.TYPE_BYTE_GRAY);
im.setData(source);
var actual = ((DataBufferByte) im.getRaster().getDataBuffer()).getData();
if (!Arrays.equals(expected, actual)) {
throw new AssertionError("Pixel values are not equal.");
}
}
}
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