Java tutorial
package function; /* * 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. */ import org.apache.pdfbox.cos.COSName; import org.apache.pdfbox.cos.COSStream; import org.apache.pdfbox.pdmodel.PDDocument; import org.apache.pdfbox.pdmodel.PDPage; import org.apache.pdfbox.pdmodel.PDResources; import org.apache.pdfbox.pdmodel.graphics.PDGraphicsState; import org.apache.pdfbox.pdmodel.graphics.xobject.PDXObject; import org.apache.pdfbox.pdmodel.graphics.xobject.PDXObjectForm; import org.apache.pdfbox.pdmodel.graphics.xobject.PDXObjectImage; import org.apache.pdfbox.util.Matrix; import org.apache.pdfbox.util.PDFOperator; import org.apache.pdfbox.util.PDFStreamEngine; import org.apache.pdfbox.util.ResourceLoader; import java.awt.geom.AffineTransform; import java.io.File; import java.io.IOException; import java.util.List; import java.util.Map; /** * This is an example on how to get the x/y coordinates of image locations. * * Usage: java org.apache.pdfbox.examples.util.PrintImageLocations <input-pdf> * * @author <a href="mailto:ben@benlitchfield.com">Ben Litchfield</a> * @version $Revision: 1.5 $ */ public class PrintImageLocations extends PDFStreamEngine { private static final String INVOKE_OPERATOR = "Do"; /** * Default constructor. * * @throws IOException If there is an error loading text stripper properties. */ public PrintImageLocations() throws IOException { super(ResourceLoader.loadProperties("org/apache/pdfbox/resources/PDFTextStripper.properties", true)); } /** * This will print the documents data. * * @param args The command line arguments. * * @throws Exception If there is an error parsing the document. */ public static void main(String[] args) throws Exception { PDDocument document = null; try { document = PDDocument.load(new File("C:/Users/ATUL/Desktop/Page-layout/output1.pdf")); if (document.isEncrypted()) { document.decrypt(""); } PrintImageLocations printer = new PrintImageLocations(); List allPages = document.getDocumentCatalog().getAllPages(); for (int i = 0; i < allPages.size(); i++) { System.out.println("\n***********************************************************"); PDPage page = (PDPage) allPages.get(i); System.out.println("Processing page: " + (i + 1)); printer.processStream(page, page.findResources(), page.getContents().getStream()); } } finally { if (document != null) { document.close(); } } } /** * This is used to handle an operation. * * @param operator The operation to perform. * @param arguments The list of arguments. * * @throws IOException If there is an error processing the operation. */ protected void processOperator(PDFOperator operator, List arguments) throws IOException { String operation = operator.getOperation(); if (INVOKE_OPERATOR.equals(operation)) { COSName objectName = (COSName) arguments.get(0); Map<String, PDXObject> xobjects = getResources().getXObjects(); PDXObject xobject = (PDXObject) xobjects.get(objectName.getName()); if (xobject instanceof PDXObjectImage) { PDXObjectImage image = (PDXObjectImage) xobject; PDPage page = getCurrentPage(); int imageWidth = image.getWidth(); int imageHeight = image.getHeight(); double pageHeight = page.getMediaBox().getHeight(); //System.out.println("*******************************************************************"); System.out.println("Found image [" + objectName.getName() + "]"); Matrix ctmNew = getGraphicsState().getCurrentTransformationMatrix(); float yScaling = ctmNew.getYScale(); float angle = (float) Math.acos(ctmNew.getValue(0, 0) / ctmNew.getXScale()); if (ctmNew.getValue(0, 1) < 0 && ctmNew.getValue(1, 0) > 0) { angle = (-1) * angle; } ctmNew.setValue(2, 1, (float) (pageHeight - ctmNew.getYPosition() - Math.cos(angle) * yScaling)); ctmNew.setValue(2, 0, (float) (ctmNew.getXPosition() - Math.sin(angle) * yScaling)); // because of the moved 0,0-reference, we have to shear in the opposite direction ctmNew.setValue(0, 1, (-1) * ctmNew.getValue(0, 1)); ctmNew.setValue(1, 0, (-1) * ctmNew.getValue(1, 0)); AffineTransform ctmAT = ctmNew.createAffineTransform(); ctmAT.scale(1f / imageWidth, 1f / imageHeight); float imageXScale = ctmNew.getXScale(); float imageYScale = ctmNew.getYScale(); System.out.println("position = " + ctmNew.getXPosition() + ", " + ctmNew.getYPosition()); // size in pixel System.out.println("size = " + imageWidth + "px, " + imageHeight + "px"); // size in page units System.out.println("size = " + imageXScale + ", " + imageYScale); // size in inches imageXScale /= 72; imageYScale /= 72; System.out.println("size = " + imageXScale + "in, " + imageYScale + "in"); // size in millimeter imageXScale *= 25.4; imageYScale *= 25.4; System.out.println("size = " + imageXScale + "mm, " + imageYScale + "mm"); System.out.println(); System.out.printf("dpi = %.0f dpi (X), %.0f dpi (Y) %n", image.getWidth() * 72 / ctmNew.getXScale(), image.getHeight() * 72 / ctmNew.getYScale()); } else if (xobject instanceof PDXObjectForm) { // save the graphics state getGraphicsStack().push((PDGraphicsState) getGraphicsState().clone()); PDPage page = getCurrentPage(); PDXObjectForm form = (PDXObjectForm) xobject; COSStream invoke = (COSStream) form.getCOSObject(); PDResources pdResources = form.getResources(); if (pdResources == null) { pdResources = page.findResources(); } // if there is an optional form matrix, we have to // map the form space to the user space Matrix matrix = form.getMatrix(); if (matrix != null) { Matrix xobjectCTM = matrix.multiply(getGraphicsState().getCurrentTransformationMatrix()); getGraphicsState().setCurrentTransformationMatrix(xobjectCTM); } processSubStream(page, pdResources, invoke); // restore the graphics state setGraphicsState((PDGraphicsState) getGraphicsStack().pop()); } } else { super.processOperator(operator, arguments); } } /** * This will print the usage for this document. */ private static void usage() { System.err.println("Usage: java org.apache.pdfbox.examples.pdmodel.PrintImageLocations <input-pdf>"); } }