mirror of
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gnujpdf reformat
This commit is contained in:
Jindra Petřík
@@ -26,18 +26,19 @@ import java.util.*;
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import java.util.zip.*;
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/**
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* <p>This implements the Image XObject. Calling one of the
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* <code>drawImage</code> methods of <code>PDFGraphics</code> will
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* put all the necessary code into the pdf file, and the image will
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* be encoded in ascii base 85, then deflated in zip format.</p>
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* <p>
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* This implements the Image XObject. Calling one of the <code>drawImage</code>
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* methods of <code>PDFGraphics</code> will put all the necessary code into the
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* pdf file, and the image will be encoded in ascii base 85, then deflated in
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* zip format.</p>
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*
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* @author Eric Z. Beard (original version by Peter Mount)
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* @author Matthew Hreljac, mhreljac@hotmail.com
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* @version $Revision: 1.2 $, $Date: 2007/08/26 18:56:35 $
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*/
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public class PDFImage extends PDFStream implements ImageObserver, Serializable
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{
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/*
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public class PDFImage extends PDFStream implements ImageObserver, Serializable {
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/*
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* NOTE: The original class is the work of Peter T. Mount, who released it
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* in the uk.org.retep.pdf package. It was modified by Eric Z. Beard as
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* follows:
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@@ -47,206 +48,211 @@ public class PDFImage extends PDFStream implements ImageObserver, Serializable
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* class was mostly rewritten
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* It is still licensed under the LGPL.
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* Got some help with base85 methods from Mathew Hreljac
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*/
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*/
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// Dimensions of the object.
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private int objwidth;
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private int objheight;
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// Dimensions of the object.
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private int objwidth;
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private int objheight;
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// Dimensions of the image.
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private int width;
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private int height;
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private Image img;
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private String name;
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// Dimensions of the image.
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private int width;
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private int height;
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private Image img;
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private String name;
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/**
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* Creates a new <code>PDFImage</code> instance.
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*
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*/
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public PDFImage()
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{
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super("/XObject");
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}
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/**
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* Creates a new <code>PDFImage</code> instance.
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*
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* @param img an <code>Image</code> value
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*/
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public PDFImage(Image img) {
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this();
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setImage(img, 0, 0, img.getWidth(this), img.getHeight(this), this);
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}
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/**
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* Creates a new <code>PDFImage</code> instance.
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*
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* @param img an <code>Image</code> value
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* @param x an <code>int</code> value
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* @param y an <code>int</code> value
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* @param w an <code>int</code> value
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* @param h an <code>int</code> value
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* @param obs an <code>ImageObserver</code> value
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*/
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public PDFImage(Image img,int x,int y,int w,int h,ImageObserver obs) {
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this();
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objwidth = w;
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objheight = h;
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setImage(img, x, y, img.getWidth(this), img.getHeight(this), obs);
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}
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/**
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* Get the value of width.
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* @return value of width.
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*/
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public int getWidth() {
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return width;
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}
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/**
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* Set the value of width.
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* @param v Value to assign to width.
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*/
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public void setWidth(int v) {
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this.width = v;
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}
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/**
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* Get the value of height.
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* @return value of height.
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*/
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public int getHeight() {
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return height;
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}
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/**
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* Set the value of height.
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* @param v Value to assign to height.
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*/
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public void setHeight(int v) {
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this.height = v;
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}
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/**
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* Set the name
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*
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* @param n a <code>String</code> value
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*/
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public void setName(String n) {
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name = n;
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}
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/**
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* Get the name
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*
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* @return a <code>String</code> value
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*/
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public String getName() {
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return name;
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}
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/**
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* Set the image
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*
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* @param img an <code>Image</code> value
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* @param x an <code>int</code> value
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* @param y an <code>int</code> value
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* @param w an <code>int</code> value
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* @param h an <code>int</code> value
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* @param obs an <code>ImageObserver</code> value
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*/
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public void setImage(Image img,int x,int y,int w,int h,ImageObserver obs) {
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this.img = img;
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width = w;
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height = h;
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}
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/**
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* <p>Adobe's base 85 does not follow the format used by ipv6
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* addresses. It simply starts with 33 and goes straight up without
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* skipping any characters</p>
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*
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* <p>Parts of this method contributed by Mathew Hreljac</p>
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*
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* @param stringToEncode a <code>String</code> value
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* @return a <code>String</code> value
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*/
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private String base85Encoding(String stringToEncode)
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throws NumberFormatException {
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if ((stringToEncode == null) || (stringToEncode.length() == 0)) {
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//System.out.println("PDFImage.base85Encoding() null or blank String");
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return "";
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/**
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* Creates a new <code>PDFImage</code> instance.
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*
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*/
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public PDFImage() {
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super("/XObject");
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}
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if ((stringToEncode.length() > 8) ||
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((stringToEncode.length() % 2) != 0)) {
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System.out.println("PDFImage.base85Encoding, Incorrect tuple length: " +
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stringToEncode.length());
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return "";
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/**
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* Creates a new <code>PDFImage</code> instance.
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*
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* @param img an <code>Image</code> value
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*/
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public PDFImage(Image img) {
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this();
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setImage(img, 0, 0, img.getWidth(this), img.getHeight(this), this);
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}
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//System.out.println("str: " + stringToEncode);
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// String buffer to use to return the String encoding
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StringBuffer sb = new StringBuffer();
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// Deal with a partial tuple (less than 8 hex digits)
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// From Adobe's docs:
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// "Given n (1, 2 or 3) bytes of binary data, the encoding first
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// appends 4 - n zero bytes to make a complete 4-tuple. This 4-tuple
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// is encoded in the usual way, but without applying the special
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// z-case. Finally, only the first n+1 characters of the resulting
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// 5-tuple are written out. Those characters are immediately followed
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// by the EOD marker, ~>"
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int numHexDigits = stringToEncode.length() / 2;
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int numAppendBytes = 4 - numHexDigits;
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for (int i = 0; i < numAppendBytes; i++) {
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stringToEncode += "00";
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/**
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* Creates a new <code>PDFImage</code> instance.
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*
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* @param img an <code>Image</code> value
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* @param x an <code>int</code> value
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* @param y an <code>int</code> value
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* @param w an <code>int</code> value
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* @param h an <code>int</code> value
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* @param obs an <code>ImageObserver</code> value
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*/
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public PDFImage(Image img, int x, int y, int w, int h, ImageObserver obs) {
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this();
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objwidth = w;
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objheight = h;
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setImage(img, x, y, img.getWidth(this), img.getHeight(this), obs);
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}
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Vector<Integer> digitVector = new Vector<Integer>();
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long number = Long.parseLong(stringToEncode, 16);
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int remainder = 0;
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while (number >= 85) {
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remainder = (int) (number % 85);
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number = number / 85;
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digitVector.add( 0, new Integer( remainder ) );
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/**
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* Get the value of width.
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*
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* @return value of width.
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*/
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public int getWidth() {
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return width;
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}
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digitVector.add( 0, new Integer( (int)number ) );
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for ( int i = 0; i < digitVector.size(); i++) {
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char c = (char) (((Integer)digitVector.elementAt(i)).intValue() + 33);
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sb.append(c);
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/**
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* Set the value of width.
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*
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* @param v Value to assign to width.
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*/
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public void setWidth(int v) {
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this.width = v;
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}
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String tuple = sb.toString();
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int len = tuple.length();
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switch (len) {
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case 1: tuple = "!!!!" + tuple; break;
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case 2: tuple = "!!!" + tuple; break;
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case 3: tuple = "!!" + tuple; break;
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case 4: tuple = "!" + tuple; break;
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default: break;
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} // end switch
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//System.out.println("enc tuple: " + tuple);
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return (tuple);
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} // end base85encoding
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/**
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* Get the value of height.
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*
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* @return value of height.
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*/
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public int getHeight() {
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return height;
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}
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/**
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* Set the value of height.
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*
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* @param v Value to assign to height.
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*/
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public void setHeight(int v) {
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this.height = v;
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}
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/**
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* Set the name
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*
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* @param n a <code>String</code> value
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*/
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public void setName(String n) {
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name = n;
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}
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/**
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* Writes the image to the stream
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*
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* @param os an <code>OutputStream</code> value
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* @exception IOException if an error occurs
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*/
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public void writeStream(OutputStream os) throws IOException {
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// This is a non-deflated stream
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/*
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/**
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* Get the name
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*
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* @return a <code>String</code> value
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*/
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public String getName() {
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return name;
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}
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/**
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* Set the image
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*
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* @param img an <code>Image</code> value
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* @param x an <code>int</code> value
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* @param y an <code>int</code> value
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* @param w an <code>int</code> value
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* @param h an <code>int</code> value
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* @param obs an <code>ImageObserver</code> value
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*/
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public void setImage(Image img, int x, int y, int w, int h, ImageObserver obs) {
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this.img = img;
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width = w;
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height = h;
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}
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/**
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* <p>
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* Adobe's base 85 does not follow the format used by ipv6 addresses. It
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* simply starts with 33 and goes straight up without skipping any
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* characters</p>
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*
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* <p>
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* Parts of this method contributed by Mathew Hreljac</p>
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*
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* @param stringToEncode a <code>String</code> value
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* @return a <code>String</code> value
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*/
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private String base85Encoding(String stringToEncode)
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throws NumberFormatException {
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if ((stringToEncode == null) || (stringToEncode.length() == 0)) {
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//System.out.println("PDFImage.base85Encoding() null or blank String");
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return "";
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}
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if ((stringToEncode.length() > 8)
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|| ((stringToEncode.length() % 2) != 0)) {
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System.out.println("PDFImage.base85Encoding, Incorrect tuple length: "
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+ stringToEncode.length());
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return "";
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}
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//System.out.println("str: " + stringToEncode);
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// String buffer to use to return the String encoding
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StringBuffer sb = new StringBuffer();
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// Deal with a partial tuple (less than 8 hex digits)
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// From Adobe's docs:
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// "Given n (1, 2 or 3) bytes of binary data, the encoding first
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// appends 4 - n zero bytes to make a complete 4-tuple. This 4-tuple
|
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// is encoded in the usual way, but without applying the special
|
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// z-case. Finally, only the first n+1 characters of the resulting
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// 5-tuple are written out. Those characters are immediately followed
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// by the EOD marker, ~>"
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int numHexDigits = stringToEncode.length() / 2;
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int numAppendBytes = 4 - numHexDigits;
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for (int i = 0; i < numAppendBytes; i++) {
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stringToEncode += "00";
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}
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Vector<Integer> digitVector = new Vector<Integer>();
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long number = Long.parseLong(stringToEncode, 16);
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int remainder = 0;
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while (number >= 85) {
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remainder = (int) (number % 85);
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number = number / 85;
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digitVector.add(0, new Integer(remainder));
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}
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digitVector.add(0, new Integer((int) number));
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for (int i = 0; i < digitVector.size(); i++) {
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char c = (char) (((Integer) digitVector.elementAt(i)).intValue() + 33);
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sb.append(c);
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}
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String tuple = sb.toString();
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int len = tuple.length();
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switch (len) {
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case 1:
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tuple = "!!!!" + tuple;
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break;
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case 2:
|
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tuple = "!!!" + tuple;
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break;
|
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case 3:
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tuple = "!!" + tuple;
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break;
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case 4:
|
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tuple = "!" + tuple;
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break;
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default:
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break;
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} // end switch
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//System.out.println("enc tuple: " + tuple);
|
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return (tuple);
|
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} // end base85encoding
|
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|
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/**
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* Writes the image to the stream
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*
|
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* @param os an <code>OutputStream</code> value
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* @exception IOException if an error occurs
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*/
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public void writeStream(OutputStream os) throws IOException {
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// This is a non-deflated stream
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/*
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os.write("/Length ".getBytes());
|
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// Accout for stream\n ... >\nendstream
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os.write(Integer.toString(buf.size() + 18).getBytes());
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@@ -254,156 +260,150 @@ public class PDFImage extends PDFStream implements ImageObserver, Serializable
|
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os.write("\n>>\nstream\n".getBytes());
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buf.writeTo(os);
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os.write(">\nendstream\nendobj\n\n".getBytes());
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*/
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ByteArrayOutputStream b = new ByteArrayOutputStream();
|
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DeflaterOutputStream dos = new DeflaterOutputStream(b);
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buf.writeTo(dos);
|
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dos.finish();
|
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dos.close();
|
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*/
|
||||
ByteArrayOutputStream b = new ByteArrayOutputStream();
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||||
DeflaterOutputStream dos = new DeflaterOutputStream(b);
|
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buf.writeTo(dos);
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||||
dos.finish();
|
||||
dos.close();
|
||||
|
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// FlatDecode is compatible with the java.util.zip.Deflater class
|
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//os.write("/Filter [/FlateDecode /ASCIIHexDecode]\n".getBytes());
|
||||
os.write("/Filter [/FlateDecode /ASCII85Decode]\n".getBytes());
|
||||
os.write("/Length ".getBytes());
|
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os.write(Integer.toString(b.size()).getBytes());
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os.write("\n>>\nstream\n".getBytes());
|
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b.writeTo(os);
|
||||
os.write("\nendstream\nendobj\n".getBytes());
|
||||
// FlatDecode is compatible with the java.util.zip.Deflater class
|
||||
//os.write("/Filter [/FlateDecode /ASCIIHexDecode]\n".getBytes());
|
||||
os.write("/Filter [/FlateDecode /ASCII85Decode]\n".getBytes());
|
||||
os.write("/Length ".getBytes());
|
||||
os.write(Integer.toString(b.size()).getBytes());
|
||||
os.write("\n>>\nstream\n".getBytes());
|
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b.writeTo(os);
|
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os.write("\nendstream\nendobj\n".getBytes());
|
||||
|
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} // end writeStream
|
||||
} // end writeStream
|
||||
|
||||
/**
|
||||
* <p>
|
||||
* Compression needs to be improved here</p>
|
||||
*
|
||||
* @param os OutputStream to send the object to
|
||||
* @exception IOException on error
|
||||
*/
|
||||
public void write(OutputStream os) throws IOException {
|
||||
writeStart(os);
|
||||
|
||||
/**
|
||||
* <p>Compression needs to be improved here</p>
|
||||
*
|
||||
* @param os OutputStream to send the object to
|
||||
* @exception IOException on error
|
||||
*/
|
||||
public void write(OutputStream os) throws IOException
|
||||
{
|
||||
writeStart(os);
|
||||
// write the extra details
|
||||
os.write("/Subtype /Image\n/Name ".getBytes());
|
||||
os.write(name.getBytes());
|
||||
os.write("\n/Width ".getBytes());
|
||||
os.write(Integer.toString(width).getBytes());
|
||||
os.write("\n/Height ".getBytes());
|
||||
os.write(Integer.toString(height).getBytes());
|
||||
os.write("\n/BitsPerComponent 8\n/ColorSpace /DeviceRGB\n".getBytes());
|
||||
|
||||
// write the extra details
|
||||
os.write("/Subtype /Image\n/Name ".getBytes());
|
||||
os.write(name.getBytes());
|
||||
os.write("\n/Width ".getBytes());
|
||||
os.write(Integer.toString(width).getBytes());
|
||||
os.write("\n/Height ".getBytes());
|
||||
os.write(Integer.toString(height).getBytes());
|
||||
os.write("\n/BitsPerComponent 8\n/ColorSpace /DeviceRGB\n".getBytes());
|
||||
// write the pixels to the stream
|
||||
//System.err.println("Processing image "+width+"x"+height+" pixels");
|
||||
ByteArrayOutputStream bos = getStream();
|
||||
|
||||
// write the pixels to the stream
|
||||
//System.err.println("Processing image "+width+"x"+height+" pixels");
|
||||
ByteArrayOutputStream bos = getStream();
|
||||
|
||||
int w = width;
|
||||
int h = height;
|
||||
int x = 0;
|
||||
int y = 0;
|
||||
int[] pixels = new int[w * h];
|
||||
PixelGrabber pg = new PixelGrabber(img, x, y, w, h, pixels, 0, w);
|
||||
try {
|
||||
pg.grabPixels();
|
||||
} catch (InterruptedException e) {
|
||||
System.err.println("interrupted waiting for pixels!");
|
||||
return;
|
||||
}
|
||||
if ((pg.getStatus() & ImageObserver.ABORT) != 0) {
|
||||
System.err.println("image fetch aborted or errored");
|
||||
return;
|
||||
}
|
||||
StringBuffer out = new StringBuffer();
|
||||
for (int j = 0; j < h; j++) {
|
||||
for (int i = 0; i < w; i++) {
|
||||
//System.out.print("p[" + j * w + i+ "]=" + pixels[j * w + i] + ".");
|
||||
out.append(handlePixel(x+i, y+j, pixels[j * w + i]));
|
||||
if (out.toString().length() >= 8) {
|
||||
String tuple = out.substring(0, 8);
|
||||
out.delete(0, 8);
|
||||
// Convert !!!!! to 'z'
|
||||
String encTuple = base85Encoding(tuple);
|
||||
if (encTuple.equals("!!!!!")) {
|
||||
encTuple = "z";
|
||||
}
|
||||
bos.write(encTuple.getBytes());
|
||||
int w = width;
|
||||
int h = height;
|
||||
int x = 0;
|
||||
int y = 0;
|
||||
int[] pixels = new int[w * h];
|
||||
PixelGrabber pg = new PixelGrabber(img, x, y, w, h, pixels, 0, w);
|
||||
try {
|
||||
pg.grabPixels();
|
||||
} catch (InterruptedException e) {
|
||||
System.err.println("interrupted waiting for pixels!");
|
||||
return;
|
||||
}
|
||||
}
|
||||
if ((pg.getStatus() & ImageObserver.ABORT) != 0) {
|
||||
System.err.println("image fetch aborted or errored");
|
||||
return;
|
||||
}
|
||||
StringBuffer out = new StringBuffer();
|
||||
for (int j = 0; j < h; j++) {
|
||||
for (int i = 0; i < w; i++) {
|
||||
//System.out.print("p[" + j * w + i+ "]=" + pixels[j * w + i] + ".");
|
||||
out.append(handlePixel(x + i, y + j, pixels[j * w + i]));
|
||||
if (out.toString().length() >= 8) {
|
||||
String tuple = out.substring(0, 8);
|
||||
out.delete(0, 8);
|
||||
// Convert !!!!! to 'z'
|
||||
String encTuple = base85Encoding(tuple);
|
||||
if (encTuple.equals("!!!!!")) {
|
||||
encTuple = "z";
|
||||
}
|
||||
bos.write(encTuple.getBytes());
|
||||
}
|
||||
}
|
||||
}
|
||||
// This should be the only partial tuple case,
|
||||
|
||||
String lastTuple = base85Encoding(out.toString());
|
||||
//System.out.println("lastTuple: " + lastTuple);
|
||||
bos.write(lastTuple.getBytes());
|
||||
bos.write("~".getBytes());
|
||||
|
||||
//System.out.println("Processing done");
|
||||
// this will write the actual stream
|
||||
setDeflate(false);
|
||||
|
||||
writeStream(os);
|
||||
|
||||
// Note: we do not call writeEnd() on streams!
|
||||
}
|
||||
// This should be the only partial tuple case,
|
||||
|
||||
String lastTuple = base85Encoding(out.toString());
|
||||
//System.out.println("lastTuple: " + lastTuple);
|
||||
bos.write(lastTuple.getBytes());
|
||||
bos.write("~".getBytes());
|
||||
/**
|
||||
* <p>
|
||||
* Converts a pixel to a hex string</p>
|
||||
*
|
||||
* @param x an <code>int</code> value
|
||||
* @param y an <code>int</code> value
|
||||
* @param p an <code>int</code> value
|
||||
* @return a <code>String</code> value
|
||||
*/
|
||||
public static String handlePixel(int x, int y, int p) {
|
||||
int alpha = (p >> 24) & 0xff;
|
||||
int red = (p >> 16) & 0xff;
|
||||
int green = (p >> 8) & 0xff;
|
||||
int blue = (p) & 0xff;
|
||||
String redHex = Integer.toHexString(red);
|
||||
String greenHex = Integer.toHexString(green);
|
||||
String blueHex = Integer.toHexString(blue);
|
||||
if (redHex.length() == 1) {
|
||||
redHex = "0" + redHex;
|
||||
}
|
||||
if (greenHex.length() == 1) {
|
||||
greenHex = "0" + greenHex;
|
||||
}
|
||||
if (blueHex.length() == 1) {
|
||||
blueHex = "0" + blueHex;
|
||||
}
|
||||
return redHex + greenHex + blueHex;
|
||||
} // end handlePixel
|
||||
|
||||
/**
|
||||
* Describe <code>imageUpdate</code> method here.
|
||||
*
|
||||
* @param img an <code>Image</code> value
|
||||
* @param infoflags an <code>int</code> value
|
||||
* @param x an <code>int</code> value
|
||||
* @param y an <code>int</code> value
|
||||
* @param w an <code>int</code> value
|
||||
* @param h an <code>int</code> value
|
||||
* @return a <code>boolean</code> value
|
||||
*/
|
||||
public boolean imageUpdate(Image img, int infoflags, int x, int y, int w, int h) {
|
||||
System.err.println("img=" + img + "\ninfoflags=" + infoflags
|
||||
+ "\nx=" + x + " y=" + y + " w=" + w + " h=" + h);
|
||||
//if(img == this.img) {
|
||||
if (infoflags == ImageObserver.WIDTH) {
|
||||
width = w;
|
||||
}
|
||||
if (infoflags == ImageObserver.HEIGHT) {
|
||||
height = h;
|
||||
}
|
||||
|
||||
//System.out.println("Processing done");
|
||||
|
||||
// this will write the actual stream
|
||||
setDeflate(false);
|
||||
|
||||
writeStream(os);
|
||||
|
||||
// Note: we do not call writeEnd() on streams!
|
||||
}
|
||||
|
||||
|
||||
|
||||
/**
|
||||
* <p>Converts a pixel to a hex string</p>
|
||||
*
|
||||
* @param x an <code>int</code> value
|
||||
* @param y an <code>int</code> value
|
||||
* @param p an <code>int</code> value
|
||||
* @return a <code>String</code> value
|
||||
*/
|
||||
public static String handlePixel(int x, int y, int p) {
|
||||
int alpha = (p >> 24) & 0xff;
|
||||
int red = (p >> 16) & 0xff;
|
||||
int green = (p >> 8) & 0xff;
|
||||
int blue = (p ) & 0xff;
|
||||
String redHex = Integer.toHexString(red);
|
||||
String greenHex = Integer.toHexString(green);
|
||||
String blueHex = Integer.toHexString(blue);
|
||||
if (redHex.length() == 1) {
|
||||
redHex = "0" + redHex;
|
||||
//return true;
|
||||
//}
|
||||
return false;
|
||||
}
|
||||
if (greenHex.length() == 1) {
|
||||
greenHex = "0" + greenHex;
|
||||
}
|
||||
if (blueHex.length() == 1) {
|
||||
blueHex = "0" + blueHex;
|
||||
}
|
||||
return redHex + greenHex + blueHex;
|
||||
} // end handlePixel
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
/**
|
||||
* Describe <code>imageUpdate</code> method here.
|
||||
*
|
||||
* @param img an <code>Image</code> value
|
||||
* @param infoflags an <code>int</code> value
|
||||
* @param x an <code>int</code> value
|
||||
* @param y an <code>int</code> value
|
||||
* @param w an <code>int</code> value
|
||||
* @param h an <code>int</code> value
|
||||
* @return a <code>boolean</code> value
|
||||
*/
|
||||
public boolean imageUpdate(Image img,int infoflags,int x,int y,int w,int h) {
|
||||
System.err.println("img="+img+"\ninfoflags="+infoflags+
|
||||
"\nx="+x+" y="+y+" w="+w+" h="+h);
|
||||
//if(img == this.img) {
|
||||
if(infoflags==ImageObserver.WIDTH)
|
||||
width = w;
|
||||
if(infoflags==ImageObserver.HEIGHT)
|
||||
height = h;
|
||||
|
||||
//return true;
|
||||
//}
|
||||
return false;
|
||||
}
|
||||
|
||||
} // end class PDFImage
|
||||
|
||||
Reference in New Issue
Block a user