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/*
* 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.pdf;
// Java
import java.io.IOException;
import java.io.OutputStream;
import java.util.Set;
/* modified by JKT to integrate with 0.12.0 */
/* modified by Eric SCHAEFFER to integrate with 0.13.0 */
/**
* PDF XObject
*
* A derivative of the PDF Object, is a PDF Stream that has not only a
* dictionary but a stream of image data.
* The dictionary just provides information like the stream length.
* This outputs the image dictionary and the image data.
* This is used as a reference for inserting the same image in the
* document in another place.
*/
public class PDFImageXObject extends PDFXObject {
private PDFImage pdfimage;
/**
* create an XObject with the given number and name and load the
* image in the object
*
* @param xnumber the pdf object X number
* @param img the pdf image that contains the image data
*/
public PDFImageXObject(int xnumber, PDFImage img) {
super();
put("Name", new PDFName("Im" + xnumber));
pdfimage = img;
}
/**
* Output the image as PDF.
* This sets up the image dictionary and adds the image data stream.
*
* @param stream the output stream to write the data
* @throws IOException if there is an error writing the data
* @return the length of the data written
*/
public int output(OutputStream stream) throws IOException {
int length = super.output(stream);
// let it gc
// this object is retained as a reference to inserting
// the same image but the image data is no longer needed
pdfimage = null;
return length;
}
/** {@inheritDoc} */
protected void populateStreamDict(Object lengthEntry) {
super.populateStreamDict(lengthEntry);
if (pdfimage.isPS()) {
populateDictionaryFromPS();
} else {
populateDictionaryFromImage();
}
}
private void populateDictionaryFromPS() {
getDocumentSafely().getProfile().verifyPSXObjectsAllowed();
put("Subtype", new PDFName("PS"));
}
private void populateDictionaryFromImage() {
put("Subtype", new PDFName("Image"));
put("Width", new Integer(pdfimage.getWidth()));
put("Height", new Integer(pdfimage.getHeight()));
put("BitsPerComponent", new Integer(pdfimage.getBitsPerComponent()));
PDFICCStream pdfICCStream = pdfimage.getICCStream();
if (pdfICCStream != null) {
put("ColorSpace", new PDFArray(this,
new Object[] {new PDFName("ICCBased"), pdfICCStream}));
} else {
PDFDeviceColorSpace cs = pdfimage.getColorSpace();
put("ColorSpace", new PDFName(cs.getName()));
}
if (pdfimage.isInverted()) {
/* PhotoShop generates CMYK values that's inverse,
* this will invert the values - too bad if it's not
* a PhotoShop image...
*/
final Float zero = new Float(0.0f);
final Float one = new Float(1.0f);
PDFArray decode = new PDFArray(this);
for (int i = 0, c = pdfimage.getColorSpace().getNumComponents(); i < c; i++) {
decode.add(one);
decode.add(zero);
}
put("Decode", decode);
}
if (pdfimage.isTransparent()) {
PDFColor transp = pdfimage.getTransparentColor();
PDFArray mask = new PDFArray(this);
if (pdfimage.getColorSpace().isGrayColorSpace()) {
mask.add(new Integer(transp.red255()));
mask.add(new Integer(transp.red255()));
} else {
mask.add(new Integer(transp.red255()));
mask.add(new Integer(transp.red255()));
mask.add(new Integer(transp.green255()));
mask.add(new Integer(transp.green255()));
mask.add(new Integer(transp.blue255()));
mask.add(new Integer(transp.blue255()));
}
put("Mask", mask);
}
PDFReference ref = pdfimage.getSoftMaskReference();
if (ref != null) {
put("SMask", ref);
}
//Important: do this at the end so previous values can be overwritten.
pdfimage.populateXObjectDictionary(getDictionary());
}
/** {@inheritDoc} */
protected void outputRawStreamData(OutputStream out) throws IOException {
pdfimage.outputContents(out);
}
/** {@inheritDoc} */
protected int getSizeHint() throws IOException {
return 0;
}
/** {@inheritDoc} */
protected void prepareImplicitFilters() {
PDFFilter pdfFilter = pdfimage.getPDFFilter();
if (pdfFilter != null) {
getFilterList().ensureFilterInPlace(pdfFilter);
}
}
/**
* {@inheritDoc}
* This class uses the PDFImage instance to determine the default filter.
*/
protected String getDefaultFilterName() {
return pdfimage.getFilterHint();
}
/** {@inheritDoc} */
protected boolean multipleFiltersAllowed() {
return pdfimage.multipleFiltersAllowed();
}
@Override
public void getChildren(Set<PDFObject> children) {
super.getChildren(children);
PDFICCStream pdfICCStream = pdfimage.getICCStream();
if (pdfICCStream != null) {
children.add(pdfICCStream);
pdfICCStream.getChildren(children);
}
}
}
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