| /* |
| * 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. |
| */ |
| |
| /* $Id$ */ |
| |
| package org.apache.fop.util; |
| |
| import static org.junit.Assert.assertEquals; |
| |
| import java.awt.Color; |
| import java.awt.Dimension; |
| import java.awt.Graphics2D; |
| import java.awt.image.BufferedImage; |
| import java.awt.image.RenderedImage; |
| import java.io.File; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.StringWriter; |
| |
| import org.apache.commons.io.IOUtils; |
| import org.apache.fop.util.bitmap.BitmapImageUtil; |
| import org.apache.fop.util.bitmap.MonochromeBitmapConverter; |
| import org.apache.xmlgraphics.image.writer.ImageWriterUtil; |
| import org.apache.xmlgraphics.util.WriterOutputStream; |
| import org.apache.xmlgraphics.util.io.ASCIIHexOutputStream; |
| import org.junit.Test; |
| |
| /** |
| * Tests {@link BitmapImageUtil}. |
| */ |
| public class BitmapImageUtilTestCase { |
| |
| private static final boolean DEBUG = true; |
| private static final boolean TEST_PIXELS = false; |
| |
| /** |
| * Tests the convertTo* methods. |
| * @throws Exception if an error occurs |
| */ |
| @Test |
| public void testConvertToMono() throws Exception { |
| BufferedImage testImage = createTestImage(); |
| saveAsPNG(testImage, "test-image"); |
| |
| RenderedImage img; |
| Dimension scaled = new Dimension(320, 240); |
| |
| img = BitmapImageUtil.convertToGrayscale(testImage, null); |
| saveAsPNG(img, "out-gray"); |
| assertEquals(1, img.getColorModel().getNumComponents()); |
| assertEquals(8, img.getColorModel().getPixelSize()); |
| assertEquals(640, img.getWidth()); |
| assertEquals(480, img.getHeight()); |
| assertPixels("5757575757575757575757FFFFFFFFFF", img, 220, 34, 16); |
| |
| img = BitmapImageUtil.convertToGrayscale(testImage, scaled); |
| saveAsPNG(img, "out-gray-scaled"); |
| assertEquals(1, img.getColorModel().getNumComponents()); |
| assertEquals(8, img.getColorModel().getPixelSize()); |
| assertEquals(320, img.getWidth()); |
| assertEquals(240, img.getHeight()); |
| |
| img = BitmapImageUtil.convertToMonochrome(testImage, null); |
| saveAsPNG(img, "out-mono"); |
| assertEquals(1, img.getColorModel().getPixelSize()); |
| assertEquals(640, img.getWidth()); |
| assertEquals(480, img.getHeight()); |
| assertPixels("00000000000000000000000101010101", img, 220, 34, 16); |
| |
| if (isJAIAvailable()) { |
| img = BitmapImageUtil.convertToMonochrome(testImage, null, 0.5f); |
| saveAsPNG(img, "out-mono-jai-0.5"); |
| assertEquals(1, img.getColorModel().getPixelSize()); |
| assertEquals(640, img.getWidth()); |
| assertEquals(480, img.getHeight()); |
| assertPixels("00010000000100000001000101010101", img, 220, 34, 16); |
| |
| img = BitmapImageUtil.convertToMonochrome(testImage, null, 1.0f); |
| saveAsPNG(img, "out-mono-jai-1.0"); |
| assertEquals(1, img.getColorModel().getPixelSize()); |
| assertEquals(640, img.getWidth()); |
| assertEquals(480, img.getHeight()); |
| assertPixels("01000001000001000001000101010101", img, 220, 34, 16); |
| } |
| } |
| |
| private void assertPixels(String expected, RenderedImage img, int x, int y, int w) |
| throws IOException { |
| if (TEST_PIXELS) { |
| byte[] byteArray = (byte[])img.getData().getDataElements(x, y, w, 1, new byte[w]); |
| assertEquals(expected, toHex(byteArray)); |
| } |
| } |
| |
| private boolean isJAIAvailable() { |
| MonochromeBitmapConverter converter |
| = BitmapImageUtil.createDefaultMonochromeBitmapConverter(); |
| return converter.getClass().getName().contains("JAI"); |
| } |
| |
| private void saveAsPNG(RenderedImage img, String name) throws IOException { |
| if (DEBUG) { |
| File baseDir = new File("./build/test-results/bitmap-conversion"); |
| baseDir.mkdirs(); |
| ImageWriterUtil.saveAsPNG(img, new File(baseDir, name + ".png")); |
| } |
| } |
| |
| private String toHex(byte[] byteArray) throws IOException { |
| InputStream in = new java.io.ByteArrayInputStream(byteArray); |
| StringWriter writer = new StringWriter(); |
| WriterOutputStream wo = new WriterOutputStream(writer, "US-ASCII"); |
| ASCIIHexOutputStream hex = new ASCIIHexOutputStream(wo); |
| IOUtils.copyLarge(in, hex); |
| return writer.toString(); |
| } |
| |
| private BufferedImage createTestImage() { |
| BufferedImage buf = new BufferedImage(640, 480, BufferedImage.TYPE_INT_RGB); |
| Graphics2D g2d = buf.createGraphics(); |
| g2d.setBackground(Color.WHITE); |
| g2d.clearRect(0, 0, buf.getWidth(), buf.getHeight()); |
| |
| //A few rectangles rotated and with different color |
| Graphics2D copy = (Graphics2D)g2d.create(); |
| copy.translate(170, 170); |
| int c = 12; |
| for (int i = 0; i < c; i++) { |
| float f = ((i + 1) / (float)c); |
| Color col = new Color(0.0f, 1 - f, 0.0f); |
| copy.setColor(col); |
| copy.fillRect(0, 0, 120, 120); |
| copy.rotate(-2 * Math.PI / c); |
| } |
| copy.dispose(); |
| |
| //the same in gray scales |
| copy = (Graphics2D)g2d.create(); |
| copy.translate(470, 310); |
| c = 12; |
| for (int i = 0; i < c; i++) { |
| float f = ((i + 1) / (float)c); |
| Color col = new Color(f, f, f); |
| copy.setColor(col); |
| copy.fillRect(0, 0, 120, 120); |
| copy.rotate(-2 * Math.PI / c); |
| } |
| copy.dispose(); |
| return buf; |
| } |
| |
| } |