/*
* This library is part of OpenCms -
* the Open Source Content Management System
*
* Copyright (c) Alkacon Software GmbH (http://www.alkacon.com)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* For further information about Alkacon Software, please see the
* company website: http://www.alkacon.com
*
* For further information about OpenCms, please see the
* project website: http://www.opencms.org
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
package org.opencms.loader;
import org.opencms.jsp.CmsJspTagImage;
import org.opencms.util.CmsFileUtil;
import junit.framework.TestCase;
/**
* Tests the OpenCms image scaler.<p>
*/
public class TestCmsImageScaler extends TestCase {
/**
* Tests the image downscaling option.<p>
*
* @throws Exception in case the test fails
*/
public void testDownScaling() throws Exception {
// read the image from the test directory, usually this would be from the VFS
String img01 = "org/opencms/loader/img_01.jpg";
byte[] content = CmsFileUtil.readFile(img01);
// create a scaler for the image and make sure it was properly initialized
CmsImageScaler image = new CmsImageScaler(content, img01);
assertEquals(800, image.getWidth());
assertEquals(600, image.getHeight());
// now create a downscaler
CmsImageScaler downScaler = new CmsImageScaler("w:800,h:600,t:1,q:80");
// downscaling should not be required because the image fits
assertFalse(image.isDownScaleRequired(downScaler));
// switch dimensions on the downscaler, image should still require no scaling
downScaler = new CmsImageScaler("w:600,h:800,t:1,q:80");
assertFalse(image.isDownScaleRequired(downScaler));
// create a smaller downscaler
downScaler = new CmsImageScaler("w:640,h:480,t:1,q:80");
assertTrue(image.isDownScaleRequired(downScaler));
// downscale the image and assert the size
downScaler = image.getDownScaler(downScaler);
byte[] scaled = downScaler.scaleImage(content, img01);
CmsImageScaler scaledImage = new CmsImageScaler(scaled, img01);
assertEquals(640, scaledImage.getWidth());
assertEquals(480, scaledImage.getHeight());
// make sure original content has sill the same size after downscaling
image = new CmsImageScaler(content, img01);
assertEquals(800, image.getWidth());
assertEquals(600, image.getHeight());
// now change the scaler dimensions
downScaler = new CmsImageScaler("w:480,h:640,t:1,q:80");
assertTrue(image.isDownScaleRequired(downScaler));
// downscale the image and assert the size
downScaler = image.getDownScaler(downScaler);
scaled = downScaler.scaleImage(content, img01);
scaledImage = new CmsImageScaler(scaled, img01);
// scaler must adjust image orientation to "landscape" automatically
assertEquals(640, scaledImage.getWidth());
assertEquals(480, scaledImage.getHeight());
// read the 2nd image from the test directory, usually this would be from the VFS
String img02 = "org/opencms/loader/img_02.gif";
content = CmsFileUtil.readFile(img02);
// create a scaler for the image and make sure it was properly initialized
image = new CmsImageScaler(content, img02);
assertEquals(480, image.getWidth());
assertEquals(643, image.getHeight());
// now create a downscaler
downScaler = new CmsImageScaler("w:800,h:600,t:1,q:80");
assertFalse(image.isDownScaleRequired(downScaler));
downScaler = new CmsImageScaler("w:600,h:800,t:1,q:80");
assertFalse(image.isDownScaleRequired(downScaler));
downScaler = new CmsImageScaler("w:643,h:480,t:1,q:80");
assertFalse(image.isDownScaleRequired(downScaler));
downScaler = new CmsImageScaler("w:400,h:500,t:1,q:80");
assertTrue(image.isDownScaleRequired(downScaler));
}
/**
* Tests the image scaling type 5.<p>
*
* @throws Exception in case the test fails
*/
public void testScaleType5() throws Exception {
CmsImageScaler baseImage;
CmsImageScaler rescaler;
CmsImageScaler resultScaler;
// Test with a square image
baseImage = new CmsImageScaler("w:250,h:250");
// Rescaler allows 100 to 150 Pixel size
rescaler = new CmsImageScaler();
rescaler.setWidth(100);
rescaler.setHeight(100);
rescaler.setMaxHeight(150);
rescaler.setMaxWidth(150);
rescaler.setType(5);
resultScaler = baseImage.getReScaler(rescaler);
assertEquals(100, resultScaler.getWidth());
assertEquals(100, resultScaler.getHeight());
assertEquals(5, resultScaler.getType());
// Test with rectangular images
baseImage = new CmsImageScaler("w:200,h:300");
resultScaler = baseImage.getReScaler(rescaler);
assertEquals(100, resultScaler.getWidth());
assertEquals(150, resultScaler.getHeight());
assertEquals(5, resultScaler.getType());
baseImage = new CmsImageScaler("w:450,h:300");
resultScaler = baseImage.getReScaler(rescaler);
assertEquals(150, resultScaler.getWidth());
assertEquals(100, resultScaler.getHeight());
assertEquals(5, resultScaler.getType());
baseImage = new CmsImageScaler("w:350,h:300");
resultScaler = baseImage.getReScaler(rescaler);
assertEquals(100, resultScaler.getWidth());
assertEquals(86, resultScaler.getHeight());
assertEquals(5, resultScaler.getType());
// Test with small images
baseImage = new CmsImageScaler("w:50,h:100");
resultScaler = baseImage.getReScaler(rescaler);
assertEquals(50, resultScaler.getWidth());
assertEquals(100, resultScaler.getHeight());
assertEquals(5, resultScaler.getType());
baseImage = new CmsImageScaler("w:50,h:150");
resultScaler = baseImage.getReScaler(rescaler);
assertEquals(50, resultScaler.getWidth());
assertEquals(150, resultScaler.getHeight());
assertEquals(5, resultScaler.getType());
baseImage = new CmsImageScaler("w:150,h:50");
resultScaler = baseImage.getReScaler(rescaler);
assertEquals(150, resultScaler.getWidth());
assertEquals(50, resultScaler.getHeight());
assertEquals(5, resultScaler.getType());
}
/**
* Tests the image scaling type 5 in the image tag (with cropping).<p>
*
* @throws Exception in case the test fails
*/
public void testScaleType5InImageTag() throws Exception {
CmsImageScaler baseImage;
CmsImageScaler rescaler;
CmsImageScaler resultScaler;
// Test with a square image
baseImage = new CmsImageScaler("w:250,h:250");
// Rescaler allows 100 to 150 Pixel size
rescaler = new CmsImageScaler();
rescaler.setWidth(100);
rescaler.setHeight(100);
rescaler.setMaxHeight(150);
rescaler.setMaxWidth(150);
rescaler.setType(5);
resultScaler = CmsJspTagImage.getScaler(rescaler, baseImage, null);
assertEquals(100, resultScaler.getWidth());
assertEquals(100, resultScaler.getHeight());
assertEquals(5, resultScaler.getType());
resultScaler = CmsJspTagImage.getScaler(rescaler, baseImage, "cw:175,ch:175,cx:25,cy:25");
assertEquals(100, resultScaler.getWidth());
assertEquals(100, resultScaler.getHeight());
assertTrue(resultScaler.isCropping());
assertEquals(5, resultScaler.getType());
resultScaler = CmsJspTagImage.getScaler(rescaler, baseImage, "cw:200,ch:50,cx:25,cy:25");
assertEquals(150, resultScaler.getWidth());
assertEquals(38, resultScaler.getHeight());
assertTrue(resultScaler.isCropping());
assertEquals(5, resultScaler.getType());
// check what happens if the rescale parameter already contain the original image height / width
resultScaler = CmsJspTagImage.getScaler(rescaler, baseImage, "h:250,w:250,cw:200,ch:50,cx:25,cy:25");
assertEquals(150, resultScaler.getWidth());
assertEquals(38, resultScaler.getHeight());
assertTrue(resultScaler.isCropping());
assertEquals(5, resultScaler.getType());
// check what happens if the rescale parameter contain some random height / width
resultScaler = CmsJspTagImage.getScaler(rescaler, baseImage, "h:999,w:999,cw:50,ch:200,cx:25,cy:25");
assertEquals(38, resultScaler.getWidth());
assertEquals(150, resultScaler.getHeight());
assertTrue(resultScaler.isCropping());
assertEquals(5, resultScaler.getType());
// check what happens if the crop is smaller then the target box, in this case the smaller image size prevails
resultScaler = CmsJspTagImage.getScaler(rescaler, baseImage, "cw:50,ch:75,cx:25,cy:25");
assertEquals(50, resultScaler.getWidth());
assertEquals(75, resultScaler.getHeight());
assertTrue(resultScaler.isCropping());
assertEquals(5, resultScaler.getType());
resultScaler = CmsJspTagImage.getScaler(rescaler, baseImage, "cw:150,ch:100,cx:25,cy:25");
assertEquals(150, resultScaler.getWidth());
assertEquals(100, resultScaler.getHeight());
assertTrue(resultScaler.isCropping());
assertEquals(5, resultScaler.getType());
}
}