115 lines
4.2 KiB
Java
115 lines
4.2 KiB
Java
/*
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* Copyright (c) 2023, 2024, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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import java.awt.Point;
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import java.awt.Transparency;
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import java.awt.color.ColorSpace;
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import java.awt.image.BandedSampleModel;
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import java.awt.image.BufferedImage;
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import java.awt.image.ComponentColorModel;
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import java.awt.image.DataBuffer;
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import java.awt.image.DataBufferByte;
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import java.awt.image.DataBufferFloat;
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import java.awt.image.DataBufferInt;
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import java.awt.image.Raster;
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import java.awt.image.WritableRaster;
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import java.util.Arrays;
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/**
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* @test
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* @author Martin Desruisseaux
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*/
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public final class SetData {
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private static final int WIDTH = 3, HEIGHT = 2;
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private static final int TRANSLATE_X = -2, TRANSLATE_Y = -3;
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public static void main(final String[] args) {
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testWithIntegers();
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testWithFloats();
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testTranslatedSource();
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}
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private static void testWithIntegers() {
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var data = new int[] {4, 8, 2, 7, 9, 1};
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var empty = new DataBufferInt(WIDTH*HEIGHT);
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var buffer = new DataBufferInt(data, WIDTH*HEIGHT);
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buffer = (DataBufferInt) writeAndRead(buffer, empty);
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if (!Arrays.equals(data, buffer.getData())) {
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throw new AssertionError("Pixel values are not equal.");
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}
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}
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private static void testWithFloats() {
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var data = new float[] {0.4f, 0.8f, 0.2f, 0.7f, 0.9f, 0.1f};
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var empty = new DataBufferFloat(WIDTH*HEIGHT);
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var buffer = new DataBufferFloat(data, WIDTH*HEIGHT);
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buffer = (DataBufferFloat) writeAndRead(buffer, empty);
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if (!Arrays.equals(data, buffer.getData())) {
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throw new AssertionError("Pixel values are not equal.");
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}
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}
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private static DataBuffer writeAndRead(DataBuffer buffer, DataBuffer empty) {
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/*
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* Prepare an image with all pixels initialized to zero.
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*/
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var dt = buffer.getDataType();
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var cs = ColorSpace.getInstance(ColorSpace.CS_GRAY);
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var cm = new ComponentColorModel(cs, false, false, Transparency.OPAQUE, dt);
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var sm = new BandedSampleModel(dt, WIDTH, HEIGHT, 1);
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var wr = Raster.createWritableRaster(sm, empty, null);
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var im = new BufferedImage(cm, wr, false, null);
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/*
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* Write data provided by the data buffer.
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*/
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wr = Raster.createWritableRaster(sm, buffer, null);
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im.setData(wr);
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return im.getRaster().getDataBuffer();
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}
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private static void testTranslatedSource() {
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var source = WritableRaster.createBandedRaster(
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DataBuffer.TYPE_BYTE,
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WIDTH - TRANSLATE_X + 2,
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HEIGHT - TRANSLATE_Y + 1, 1,
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new Point(TRANSLATE_X, TRANSLATE_Y));
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for (int y=0; y<HEIGHT; y++) {
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for (int x=0; x<WIDTH; x++) {
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source.setSample(x, y, 0, (y+1)*10 + (x+1));
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}
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}
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var expected = new byte[] {
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11, 12, 13,
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21, 22, 23
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};
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var im = new BufferedImage(WIDTH, HEIGHT, BufferedImage.TYPE_BYTE_GRAY);
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im.setData(source);
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var actual = ((DataBufferByte) im.getRaster().getDataBuffer()).getData();
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if (!Arrays.equals(expected, actual)) {
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throw new AssertionError("Pixel values are not equal.");
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}
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}
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}
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