org.jpedal.parser.XFormDecoder 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
*
* ---------------
* XFormDecoder.java
* ---------------
*/
package org.jpedal.parser;
import java.awt.Shape;
import java.awt.geom.Area;
import java.awt.image.BufferedImage;
import org.jpedal.PdfDecoderInt;
import org.jpedal.exception.PdfException;
import org.jpedal.external.ExternalHandlers;
import org.jpedal.objects.GraphicsState;
import org.jpedal.objects.raw.PdfDictionary;
import org.jpedal.objects.raw.PdfObject;
import org.jpedal.parser.image.ImageCommands;
import org.jpedal.parser.image.XForm;
import org.jpedal.parser.image.mask.MaskUtils;
import org.jpedal.utils.LogWriter;
import org.jpedal.utils.Matrix;
public class XFormDecoder {
/**
* recursive subroutine so in actual body of PdfStreamDecoder so it can recall decodeStream
* @param pdfStreamDecoder
* @param dataPointer
*/
static void processXForm(final PdfStreamDecoder pdfStreamDecoder, final int dataPointer, final PdfObject XObject, final Shape defaultClip, final CommandParser parser) {
final boolean debug=false;
if(debug) {
System.out.println("processImage " + dataPointer + ' ' + XObject.getObjectRefAsString() + ' ' + defaultClip);
}
final String oldFormName= pdfStreamDecoder.formName;
final String name=parser.generateOpAsString(0, true);
//Removed to fix issue with render to g2
//name is not unique if in form so we add form level to separate out
//if(formLevel>1)
// name= formName+'_'+ formLevel+'_'+name;
//string to hold image details
try {
if(ImageCommands.trackImages){
//add details to string so we can pass back
if(pdfStreamDecoder.imagesInFile ==null) {
pdfStreamDecoder.imagesInFile = name + " Form";
} else {
pdfStreamDecoder.imagesInFile = name + " Form\n" + pdfStreamDecoder.imagesInFile;
}
}
//reset operand
parser.reset();
//read stream for image
final byte[] objectData = pdfStreamDecoder.currentPdfFile.readStream(XObject, true, true, false, false, false, XObject.getCacheName(pdfStreamDecoder.currentPdfFile.getObjectReader()));
if (objectData != null) {
final String oldIndent= PdfStreamDecoder.indent;
PdfStreamDecoder.indent += " ";
//set value and see if Transform matrix
float[] transformMatrix=new float[6];
float[] matrix=XObject.getFloatArray(PdfDictionary.Matrix);
/*
* see if we should ignore scaling because we have already scaled in
* see 14jan/test_de_signature.pdf
*/
final float[] formBBox = XObject.getFloatArray(PdfDictionary.BBox);
if (matrix != null && pdfStreamDecoder.BBox != null && formBBox != null) {
final float Bwidth;
final float Bheight;
if (pdfStreamDecoder.parserOptions.isFlattenedForm()) {
Bwidth = (pdfStreamDecoder.BBox[2] - pdfStreamDecoder.BBox[0]);
Bheight = (pdfStreamDecoder.BBox[3] - pdfStreamDecoder.BBox[1]);
} else {
Bwidth = (pdfStreamDecoder.BBox[2] - pdfStreamDecoder.BBox[0]) / matrix[0];
Bheight = (pdfStreamDecoder.BBox[3] - pdfStreamDecoder.BBox[1]) / matrix[3];
}
if (Bwidth == (formBBox[2] - formBBox[0]) && Bheight == (formBBox[3] - formBBox[1]) && matrix[4]==0 && matrix[5]==0) {
matrix = null;
}
}
final boolean isIdentity=matrix==null || XForm.isIdentity(matrix);
if(matrix!=null) {
transformMatrix = matrix;
}
final float[][] CTM;
final float[][] oldCTM;
final int currentDepth= pdfStreamDecoder.graphicsStates.getDepth();
//allow for stroke line width being altered by scaling
float lineWidthInForm=-1; //negative values not used
//save current
final float[][] currentCTM=new float[3][3];
for(int i=0;i<3;i++) {
System.arraycopy(pdfStreamDecoder.gs.CTM[i], 0, currentCTM[i], 0, 3);
}
oldCTM = currentCTM;
CTM= pdfStreamDecoder.gs.CTM;
float[][] scaleF= pdfStreamDecoder.gs.scaleFactor;
if(matrix!=null && !isIdentity) {
final float[][] scaleFactor={{transformMatrix[0],transformMatrix[1],0},
{transformMatrix[2],transformMatrix[3],0},
{transformMatrix[4],transformMatrix[5],1}};
scaleF=scaleFactor;
pdfStreamDecoder.gs.CTM= Matrix.multiply(scaleFactor, CTM);
//work out line width
lineWidthInForm=transformMatrix[0]* pdfStreamDecoder.gs.getLineWidth();
if (lineWidthInForm == 0) {
lineWidthInForm = transformMatrix[1] * pdfStreamDecoder.gs.getLineWidth();
}
if(lineWidthInForm<0) {
lineWidthInForm = -lineWidthInForm;
}
if(debug) {
System.out.println("setMatrix " + pdfStreamDecoder.gs.CTM[0][0] + ' ' + pdfStreamDecoder.gs.CTM[0][1] + ' ' + pdfStreamDecoder.gs.CTM[1][0] + ' ' + pdfStreamDecoder.gs.CTM[1][1] + ' ' + pdfStreamDecoder.gs.CTM[2][0] + ' ' + pdfStreamDecoder.gs.CTM[2][1]);
}
}
//track depth
pdfStreamDecoder.formLevel++;
//track name so we can make unique key for image name
if(pdfStreamDecoder.formLevel ==1) {
pdfStreamDecoder.formName = name;
} else if(pdfStreamDecoder.formLevel <20) //stop memory issue on silly files
{
pdfStreamDecoder.formName = pdfStreamDecoder.formName + '_' + name;
}
//preserve colors
int mainStrokeColorData = pdfStreamDecoder.gs.strokeColorSpace.getColor().getRGB();
int mainnonStrokeColorData = pdfStreamDecoder.gs.nonstrokeColorSpace.getColor().getRGB();
//set form line width if appropriate
if(lineWidthInForm>0) {
pdfStreamDecoder.gs.setLineWidth(lineWidthInForm);
}
//set gs max to current so child gs values can not exceed
final float maxStrokeValue= pdfStreamDecoder.gs.getAlphaMax(GraphicsState.STROKE);
final float maxFillValue= pdfStreamDecoder.gs.getAlphaMax(GraphicsState.FILL);
final float currentFillValue= pdfStreamDecoder.gs.getAlpha(GraphicsState.FILL);
pdfStreamDecoder.gs.setMaxAlpha(GraphicsState.STROKE, pdfStreamDecoder.gs.getAlpha(GraphicsState.STROKE));
//if(pdfStreamDecoder.formLevel ==1) {
if(pdfStreamDecoder.formLevel<3 && currentFillValue1 && BBox[3]>1 && pdfStreamDecoder.gs.getClippingShape()==null && pdfStreamDecoder.gs.CTM[0][1]==0 && pdfStreamDecoder.gs.CTM[1][0]==0 && pdfStreamDecoder.gs.CTM[2][1]!=0 && pdfStreamDecoder.gs.CTM[2][0]<0){
if(debug) {
System.out.println("setClip1 ");
}
clip = XForm.setClip(defaultClip, BBox, pdfStreamDecoder.gs, pdfStreamDecoder.current);
clipChanged=true;
//System.out.println(BBox[0]+" "+BBox[1]+" "+BBox[2]+" "+BBox[3]);
//Matrix.show(gs.CTM);
}
else if(BBox!=null && BBox[0]==0 && BBox[1]==0 && BBox[2]>1 && BBox[3]>1 && BBox[2]!=BBox[3] && (pdfStreamDecoder.gs.CTM[0][0]>0.99 || pdfStreamDecoder.gs.CTM[2][1]<-1) && (pdfStreamDecoder.gs.CTM[2][0]<-1 || pdfStreamDecoder.gs.CTM[2][0]>1) && pdfStreamDecoder.gs.CTM[2][1]!=0 ){//) && BBox[2]>1 && BBox[3]>1 ){//if(BBox!=null && matrix==null && BBox[0]==0 && BBox[1]==0){
if(debug) {
System.out.println("setClip2");
}
clip = XForm.setClip(defaultClip, BBox, pdfStreamDecoder.gs, pdfStreamDecoder.current);
clipChanged=true;
}
//attempt to fix odd customers3/slides1.pdf text off page issue
//no obvious reason to ignore text on form other than negative y value
//adjusted to fix 11jun/Request_For_Quotation.pdf
//if(formLevel==1 && gs.CTM[0][0]!=0 && gs.CTM[0][0]!=gs.CTM[0][1] && gs.CTM[0][0]!=1 && currentTextState.Tm[0][0]==1 && gs.CTM[1][1]<1f && (gs.CTM[1][1]>0.92f || gs.CTM[0][1]!=0) && currentTextState.Tm[2][1]<0){
//adjusted again to fix 15jan/21130.pdf
//else if(BBox!=null && BBox[0]==0 && BBox[1]==0 && BBox[2]>1 && BBox[3]>1 && (pdfStreamDecoder.formLevel>0 || pdfStreamDecoder.gs.getClippingShape()!=null)){
else if(BBox!=null && BBox[0]==0 && BBox[1]==0 && BBox[2]>1 && BBox[3]>1 && !(pdfStreamDecoder.gs.CTM[2][0]<0) && (pdfStreamDecoder.formLevel>0 || pdfStreamDecoder.gs.getClippingShape()!=null)){
//&& (gs.CTM[0][0]>0.99 || gs.CTM[2][1]<-1) && (gs.CTM[2][0]<-1 || gs.CTM[2][0]>1) && gs.CTM[2][1]!=0 ){
if(debug) {
System.out.println("setClip3");
}
clip = XForm.setClip(defaultClip, BBox, pdfStreamDecoder.gs, pdfStreamDecoder.current);
clipChanged=true;
}else if(pdfStreamDecoder.formLevel >1 && BBox!=null && BBox[0]>50 && BBox[1]>50 && pdfStreamDecoder.gs.getClippingShape()!=null && (BBox[0]-1)> pdfStreamDecoder.gs.getClippingShape().getBounds().x &&
(BBox[1]-1)> pdfStreamDecoder.gs.getClippingShape().getBounds().y ){
// System.out.println("XX form="+formLevel);
// System.out.println(BBox[0]+" "+BBox[1]+" "+BBox[2]+" "+BBox[3]);
// System.out.println(gs.getClippingShape().getBounds()+" "+defaultClip);
if(debug) {
System.out.println("setClip4");
}
clip = XForm.setClip(defaultClip, BBox, pdfStreamDecoder.gs, pdfStreamDecoder.current);
clipChanged=true;
}else if(BBox!=null && BBox[2]>1 && BBox[3]>1 && pdfStreamDecoder.gs.getClippingShape()==null && pdfStreamDecoder.gs.CTM[0][1]>0 && pdfStreamDecoder.gs.CTM[1][0]<0 && pdfStreamDecoder.gs.CTM[0][0]==0 && pdfStreamDecoder.gs.CTM[1][1]==0){
if(debug) {
System.out.println("setClip5");
}
clip = XForm.setClip(defaultClip, BBox, pdfStreamDecoder.gs, pdfStreamDecoder.current);
clipChanged=true;
}else if(debug){
System.out.println("no Clip set");
}
if(objectData.length>0){
final PdfObject newSMask = XForm.getSMask(BBox, pdfStreamDecoder.gs, pdfStreamDecoder.currentPdfFile); //check for soft mask we need to apply
final int blendMode= pdfStreamDecoder.gs.getBMValue();
/*
* option to include Form as image if extracting images
*/
if((pdfStreamDecoder.parserOptions.getExtractionMode() & PdfDecoderInt.RASTERIZE_FORMS)==PdfDecoderInt.RASTERIZE_FORMS){
processXFormAsImage(XObject, pdfStreamDecoder);
}
if(newSMask!=null || blendMode!=PdfDictionary.Normal){
processXFormWithMaskOrBlend(debug, newSMask, pdfStreamDecoder, blendMode, XObject, name);
}else{
if(debug) {
System.out.println("decode");
}
final int BM= pdfStreamDecoder.gs.getBMValue();
pdfStreamDecoder.decodeStreamIntoObjects(objectData, false);
pdfStreamDecoder.current.setGraphicsState(GraphicsState.STROKE, pdfStreamDecoder.gs.getAlpha(GraphicsState.STROKE), BM);
pdfStreamDecoder.current.setGraphicsState(GraphicsState.FILL, pdfStreamDecoder.gs.getAlpha(GraphicsState.FILL), BM);
}
}
//restore clip if changed
if(clipChanged){
pdfStreamDecoder.gs.setClippingShape(clip);
pdfStreamDecoder.current.drawClip(pdfStreamDecoder.gs, clip, false) ;
}
//restore settings
pdfStreamDecoder.formLevel--;
//allow for stream not correctly setup
pdfStreamDecoder.graphicsStates.correctDepth(currentDepth, pdfStreamDecoder.gs, pdfStreamDecoder.current);
//
//restore old matrix or set default
//fixes 12dec/81564885_1355243032.pdf
if(oldCTM!=null){
pdfStreamDecoder.gs.CTM=oldCTM;
}else if(pdfStreamDecoder.gs.CTM[0][0]==1f && pdfStreamDecoder.gs.CTM[1][1]==1f){
pdfStreamDecoder.gs.CTM=new float[][]{{1,0,0},{0,1,0},{0,0,1}};
}
pdfStreamDecoder.gs.scaleFactor=scaleF;
/*restore old colorspace*/
pdfStreamDecoder.gs.resetColorSpaces(mainStrokeColorData,mainnonStrokeColorData);
//put back original state
pdfStreamDecoder.cache.restore(mainCache);
//restore gs max to current so child gs values can not exceed
pdfStreamDecoder.gs.setMaxAlpha(GraphicsState.STROKE, maxStrokeValue);
pdfStreamDecoder.gs.setMaxAlpha(GraphicsState.FILL, maxFillValue);
PdfStreamDecoder.indent=oldIndent;
}
} catch (final Error e) {
LogWriter.writeLog("Exception: " + e.getMessage());
pdfStreamDecoder.parserOptions.imagesProcessedFully=false;
pdfStreamDecoder.errorTracker.addPageFailureMessage("Error " + e + " in DO");
if (ExternalHandlers.throwMissingCIDError && e.getMessage()!=null && e.getMessage().contains("kochi")) {
throw e;
}
} catch (final PdfException e) {
LogWriter.writeLog("Exception " + e);
pdfStreamDecoder.parserOptions.imagesProcessedFully=false;
pdfStreamDecoder.errorTracker.addPageFailureMessage("Error " + e + " in DO");
}
pdfStreamDecoder.formName =oldFormName;
}
static void processXFormWithMaskOrBlend(final boolean debug, final PdfObject newSMask, final PdfStreamDecoder pdfStreamDecoder, final int blendMode, final PdfObject XObject, final String name) {
// || gs.getAlpha(GraphicsState.FILL)<1f){
if(debug) {
System.out.println("createMaskForm " + newSMask);
}
if(newSMask==null && !pdfStreamDecoder.current.isHTMLorSVG()){ //needs to be normal for actual Mask
pdfStreamDecoder.current.setGraphicsState(GraphicsState.STROKE, pdfStreamDecoder.gs.getAlpha(GraphicsState.STROKE), PdfDictionary.Normal);
pdfStreamDecoder.current.setGraphicsState(GraphicsState.FILL, pdfStreamDecoder.gs.getAlpha(GraphicsState.FILL), PdfDictionary.Normal);
}
final boolean useTransparancy=newSMask!=null || blendMode!=PdfDictionary.Normal || pdfStreamDecoder.gs.getAlpha(GraphicsState.FILL)==1f;
MaskUtils.createMaskForm(XObject, name, newSMask, pdfStreamDecoder.gs, pdfStreamDecoder.current, pdfStreamDecoder.currentPdfFile, pdfStreamDecoder.parserOptions, pdfStreamDecoder.formLevel, pdfStreamDecoder.multiplyer, useTransparancy,blendMode);
if(newSMask==null && !pdfStreamDecoder.current.isHTMLorSVG()){ //needs to be normal for actual Mask
pdfStreamDecoder.current.setGraphicsState(GraphicsState.STROKE, pdfStreamDecoder.gs.getAlpha(GraphicsState.STROKE), blendMode);
pdfStreamDecoder.current.setGraphicsState(GraphicsState.FILL, pdfStreamDecoder.gs.getAlpha(GraphicsState.FILL), blendMode);
}
}
static void processXFormAsImage(final PdfObject XObject, final PdfStreamDecoder pdfStreamDecoder) {
float[] BBox;
BBox= XObject.getFloatArray(PdfDictionary.BBox);
//int fx=(int)BBox[0];
final int fy=(int)BBox[1];
final int fw=(int)BBox[2];
final int fh=(int)(BBox[3]);
//get the form as an image
final BufferedImage currentImage= MaskUtils.createTransparentForm(XObject, fy, fw, fh, pdfStreamDecoder.currentPdfFile, pdfStreamDecoder.parserOptions, pdfStreamDecoder.formLevel, pdfStreamDecoder.multiplyer);
final String imgName='R'+ pdfStreamDecoder.formName;
//store final image on disk & in memory
pdfStreamDecoder.pdfImages.setImageInfo(imgName, pdfStreamDecoder.parserOptions.getPageNumber(), pdfStreamDecoder.gs.CTM[2][0], pdfStreamDecoder.gs.CTM[2][1], fw, fh);
//save the image (R and normal so works with existing code)
pdfStreamDecoder.objectStoreStreamRef.saveStoredImageAsBytes('R' + imgName, currentImage, false);
pdfStreamDecoder.objectStoreStreamRef.saveStoredImageAsBytes(imgName, currentImage, false);
// pdfStreamDecoder.objectStoreStreamRef.saveStoredImage('R' + imgName, currentImage, false, "jpg");
// pdfStreamDecoder.objectStoreStreamRef.saveStoredImage(imgName, currentImage, false, "jpg");
}
}
© 2015 - 2024 Weber Informatics LLC | Privacy Policy