org.jpedal.parser.image.ID Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of OpenViewerFX Show documentation
Show all versions of OpenViewerFX Show documentation
An Open Source JavaFX PDF Viewer
/*
* ===========================================
* Java Pdf Extraction Decoding Access Library
* ===========================================
*
* Project Info: http://www.idrsolutions.com
* Help section for developers at http://www.idrsolutions.com/support/
*
* (C) Copyright 1997-2016 IDRsolutions and Contributors.
*
* This file is part of JPedal/JPDF2HTML5
*
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.
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
*
* ---------------
* ID.java
* ---------------
*/
package org.jpedal.parser.image;
import java.awt.Color;
import java.awt.image.BufferedImage;
import org.jpedal.color.ColorspaceFactory;
import org.jpedal.color.DeviceRGBColorSpace;
import org.jpedal.color.GenericColorSpace;
import org.jpedal.exception.PdfException;
import org.jpedal.external.ErrorTracker;
import org.jpedal.external.ImageHandler;
import org.jpedal.io.*;
import org.jpedal.objects.PdfImageData;
import org.jpedal.objects.PdfPageData;
import org.jpedal.objects.raw.PdfArrayIterator;
import org.jpedal.objects.raw.PdfDictionary;
import org.jpedal.objects.raw.PdfObject;
import org.jpedal.parser.PdfObjectCache;
import org.jpedal.parser.image.data.ImageData;
public class ID extends ImageDecoder {
public ID(final int imageCount, final PdfObjectReader currentPdfFile, final ErrorTracker errorTracker, final ImageHandler customImageHandler, final ObjectStore objectStoreStreamRef, final PdfImageData pdfImages, final PdfPageData pageData, final String imagesInFile) {
super(imageCount, currentPdfFile, errorTracker, customImageHandler, objectStoreStreamRef, pdfImages, pageData, imagesInFile);
}
@Override
public int processImage(int dataPointer, final int startInlineStream, final byte[] stream, final int tokenNumber) throws Exception{
PdfObject XObject=convertDataToObject(dataPointer, startInlineStream, stream, currentPdfFile.getObjectReader());
final boolean inline_imageMask=XObject.getBoolean(PdfDictionary.ImageMask);
int inline_start_pointer = dataPointer + 1;
final int i_w=XObject.getInt(PdfDictionary.Width);
final int i_h=XObject.getInt(PdfDictionary.Height);
final int i_bpc=XObject.getInt(PdfDictionary.BitsPerComponent);
//find end of stream
int i = getEndOfImageData(inline_start_pointer, stream);
if(parserOptions.imagesNeeded()){
BufferedImage image = null;
final String image_name =parserOptions.getFileName()+ "-IN-" + tokenNumber;
byte[] i_data=setImageData(i, stream, inline_start_pointer, XObject);
// allow user to process image
if(customImageHandler!=null) {
image = customImageHandler.processImageData(gs, XObject);
}
i_data = decompressData(XObject, i_data, i_w, i_h);
final GenericColorSpace decodeColorData=setColorSpace(XObject,currentPdfFile, cache);
decodeColorData.setPrinting(parserOptions.isPrinting());
//track colorspace use
cache.put(PdfObjectCache.ColorspacesUsed, decodeColorData.getID(),"x");
if(i_data!=null){
if(customImageHandler==null ||(image==null && !customImageHandler.alwaysIgnoreGenericHandler())){
image = convertDataToImage(i_w, i_h, i_bpc, i_data, decodeColorData, image, inline_imageMask, XObject, image_name);
}
if (image != null){
renderImage(image, image_name);
}
}
}
dataPointer = i + 3;
return dataPointer;
}
private void renderImage(BufferedImage image, final String image_name) {
if(current.isHTMLorSVG()){
current.drawImage(parserOptions.getPageNumber(),image,gs,false,image_name, -2);
}else{
gs.x=gs.CTM[2][0];
gs.y=gs.CTM[2][1];
current.drawImage(parserOptions.getPageNumber(), image, gs, false, image_name, -1);
}
if(image!=null) {
image.flush();
}
}
private BufferedImage convertDataToImage(final int i_w, final int i_h, final int i_bpc, byte[] i_data, final GenericColorSpace decodeColorData, BufferedImage image, final boolean inline_imageMask, PdfObject XObject, final String image_name) throws PdfException {
final ImageData imageData=new ImageData(ImageCommands.ID);
imageData.setWidth(i_w);
imageData.setHeight(i_h);
imageData.setDepth(i_bpc);
imageData.setObjectData(i_data);
imageData.setCompCount(decodeColorData.getColorSpace().getNumComponents());
image=processImage(decodeColorData, imageData, inline_imageMask, XObject);
//transparency slows down printing so try to reduce if possible in printing
if(inline_imageMask && !ImageDecoder.allowPrintTransparency && parserOptions.isPrinting() && image!=null && imageData.getDepth()==1){
image = setupMask(image);
}
//generate name including filename to make it unique
currentImage = image_name;
return image;
}
private static GenericColorSpace setColorSpace(PdfObject XObject, PdfObjectReader currentPdfFile, PdfObjectCache cache) {
//handle colour information
GenericColorSpace decodeColorData=new DeviceRGBColorSpace();
//resolve color details
PdfArrayIterator ColorSpace=XObject.getMixedArray(PdfDictionary.ColorSpace);
if(ColorSpace.getTokenCount()>0){ //if not set will be zero
//allow for lookup
final String colKey=ColorSpace.getNextValueAsString(false);
if(colKey!=null){ //allow for /R188 stored in lookup
final Object col=cache.get(PdfObjectCache.Colorspaces,colKey.substring(1));
if(col!=null) {
ColorSpace = ColorspaceFactory.convertColValueToMixedArray(currentPdfFile,(byte[])col);
}
}
decodeColorData= ColorspaceFactory.getColorSpaceInstance(currentPdfFile, ColorSpace);
}
return decodeColorData;
}
private static PdfObject convertDataToObject(int dataPointer, final int startInlineStream, final byte[] stream, final PdfFileReader pdfFileReader) {
final PdfObject XObject=new org.jpedal.objects.raw.XObject(PdfDictionary.ID);
final IDObjectDecoder objectDecoder=new IDObjectDecoder(pdfFileReader);
objectDecoder.setEndPt(dataPointer-2);
objectDecoder.readDictionaryAsObject(XObject,startInlineStream,stream);
return XObject;
}
private BufferedImage setupMask(BufferedImage image) {
//setup any imageMask
final byte[] maskCol=ImageCommands.getMaskColor(gs);
if(maskCol!=null && maskCol[0]==0 && maskCol[1]==0 && maskCol[2]==0 && maskCol[3]==0){
final int iw=image.getWidth();
final int ih=image.getHeight();
final BufferedImage newImage=new BufferedImage(iw,ih,BufferedImage.TYPE_BYTE_GRAY);
newImage.getGraphics().setColor(Color.WHITE);
newImage.getGraphics().fillRect(0,0,iw,ih);
newImage.getGraphics().drawImage(image, 0, 0, null);
image=newImage;
}
return image;
}
private byte[] decompressData(final PdfObject XObject, byte[] i_data, final int i_w, final int i_h) throws Exception {
final PdfArrayIterator filters = XObject.getMixedArray(PdfDictionary.Filter);
//check not handled elsewhere
final int firstValue;
boolean needsDecoding=false;
if(filters!=null && filters.hasMoreTokens()){
firstValue=filters.getNextValueAsConstant(false);
needsDecoding=(firstValue!= PdfFilteredReader.JPXDecode && firstValue!=PdfFilteredReader.DCTDecode);
}
//handle filters (JPXDecode/DCT decode is handle by process image)
if(needsDecoding){
final PdfFilteredReader filter=new PdfFilteredReader();
i_data=filter.decodeFilters(ObjectUtils.setupDecodeParms(XObject, currentPdfFile.getObjectReader()), i_data, filters, i_w, i_h, null);
}
return i_data;
}
private static byte[] setImageData(int i, final byte[] stream, int inline_start_pointer, final PdfObject XObject) {
int endPtr=i;
//hack for odd files
if(i3 && stream[i + 1] == 69 && stream[i + 2] == 73 && ((stream[i+3] == 10 && (streamLength==i+4 || stream[i+4]==81)) || (stream[i+3]==32 && stream[i+4] == 10))){
break;
}
//handle RADPDF variety (see 26654)
if (streamLength-i>3 && stream[i + 1] == 69 && stream[i + 2] == 73 && ((stream[i+3] == 32 && stream[i+4] == 32))){
break;
}
//general case
if ((streamLength-i>3)&&(stream[i] == 32 || stream[i] == 10 || stream[i] == 13 || (stream[i+3] == 32 && stream[i+4] == 'Q'))
&& (stream[i + 1] == 69)
&& (stream[i + 2] == 73)
&& ( stream[i+3] == 32 || stream[i+3] == 10 || stream[i+3] == 13)) {
break;
}
i++;
if(i==streamLength) {
break;
}
}
return i;
}
}
© 2015 - 2024 Weber Informatics LLC | Privacy Policy