| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package org.apache.commons.imaging.roundtrip; |
| |
| import java.awt.image.BufferedImage; |
| import java.io.File; |
| import java.util.Arrays; |
| import java.util.HashMap; |
| import java.util.Map; |
| import java.util.stream.Stream; |
| |
| import org.apache.commons.imaging.ImageInfo; |
| import org.apache.commons.imaging.Imaging; |
| import org.apache.commons.imaging.ImagingConstants; |
| import org.apache.commons.imaging.PixelDensity; |
| import org.junit.jupiter.params.ParameterizedTest; |
| import org.junit.jupiter.params.provider.MethodSource; |
| |
| import static org.junit.jupiter.api.Assertions.assertTrue; |
| |
| public class PixelDensityRoundtrip extends RoundtripBase { |
| |
| public static Stream<FormatInfo> testPixelDensityRoundtrip() { |
| return Arrays.stream(FormatInfo.PRESERVING_RESOLUTION_FORMATS); |
| } |
| |
| @ParameterizedTest |
| @MethodSource |
| public void testPixelDensityRoundtrip(final FormatInfo formatInfo) throws Exception { |
| final BufferedImage testImage = TestImages.createFullColorImage(2, 2); |
| |
| final File temp1 = createTempFile("pixeldensity.", "." |
| + formatInfo.format.getExtension()); |
| |
| final Map<String, Object> params = new HashMap<>(); |
| final PixelDensity pixelDensity = PixelDensity.createFromPixelsPerInch(75, 150); |
| params.put(ImagingConstants.PARAM_KEY_PIXEL_DENSITY, pixelDensity); |
| Imaging.writeImage(testImage, temp1, formatInfo.format, params); |
| |
| final ImageInfo imageInfo = Imaging.getImageInfo(temp1); |
| if (imageInfo != null) { |
| final int xReadDPI = imageInfo.getPhysicalWidthDpi(); |
| final int yReadDPI = imageInfo.getPhysicalHeightDpi(); |
| // allow a 5% margin of error in storage and conversion |
| assertTrue(Math.abs((xReadDPI - pixelDensity.horizontalDensityInches()) / |
| pixelDensity.horizontalDensityInches()) <= 0.05); |
| assertTrue(Math.abs((yReadDPI - pixelDensity.verticalDensityInches()) / |
| pixelDensity.verticalDensityInches()) <= 0.05); |
| } |
| } |
| |
| } |