org.apache.poi.hslf.model.Picture Maven / Gradle / Ivy
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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
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http://www.apache.org/licenses/LICENSE-2.0
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package org.apache.poi.hslf.model;
import java.awt.Graphics2D;
import java.awt.Insets;
import java.awt.geom.AffineTransform;
import java.awt.image.BufferedImage;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.util.List;
import javax.imageio.ImageIO;
import org.apache.poi.ddf.EscherBSERecord;
import org.apache.poi.ddf.EscherComplexProperty;
import org.apache.poi.ddf.EscherContainerRecord;
import org.apache.poi.ddf.EscherOptRecord;
import org.apache.poi.ddf.EscherProperties;
import org.apache.poi.ddf.EscherRecord;
import org.apache.poi.ddf.EscherSimpleProperty;
import org.apache.poi.ddf.EscherSpRecord;
import org.apache.poi.hslf.blip.Bitmap;
import org.apache.poi.hslf.record.Document;
import org.apache.poi.hslf.usermodel.PictureData;
import org.apache.poi.hslf.usermodel.SlideShow;
import org.apache.poi.util.POILogger;
import org.apache.poi.util.StringUtil;
import org.apache.poi.util.Units;
/**
* Represents a picture in a PowerPoint document.
*
* @author Yegor Kozlov
*/
public class Picture extends SimpleShape {
/**
* Windows Enhanced Metafile (EMF)
*/
public static final int EMF = 2;
/**
* Windows Metafile (WMF)
*/
public static final int WMF = 3;
/**
* Macintosh PICT
*/
public static final int PICT = 4;
/**
* JPEG
*/
public static final int JPEG = 5;
/**
* PNG
*/
public static final int PNG = 6;
/**
* Windows DIB (BMP)
*/
public static final byte DIB = 7;
/**
* Create a new Picture
*
* @param idx the index of the picture
*/
public Picture(int idx){
this(idx, null);
}
/**
* Create a new Picture
*
* @param idx the index of the picture
* @param parent the parent shape
*/
public Picture(int idx, Shape parent) {
super(null, parent);
_escherContainer = createSpContainer(idx, parent instanceof ShapeGroup);
}
/**
* Create a Picture object
*
* @param escherRecord the EscherSpContainer record which holds information about
* this picture in the Slide
* @param parent the parent shape of this picture
*/
protected Picture(EscherContainerRecord escherRecord, Shape parent){
super(escherRecord, parent);
}
/**
* Returns index associated with this picture.
* Index starts with 1 and points to a EscherBSE record which
* holds information about this picture.
*
* @return the index to this picture (1 based).
*/
public int getPictureIndex(){
EscherOptRecord opt = getEscherOptRecord();
EscherSimpleProperty prop = getEscherProperty(opt, EscherProperties.BLIP__BLIPTODISPLAY);
return prop == null ? 0 : prop.getPropertyValue();
}
/**
* Create a new Picture and populate the inital structure of the EscherSp record which holds information about this picture.
* @param idx the index of the picture which refers to EscherBSE container.
* @return the create Picture object
*/
protected EscherContainerRecord createSpContainer(int idx, boolean isChild) {
_escherContainer = super.createSpContainer(isChild);
_escherContainer.setOptions((short)15);
EscherSpRecord spRecord = _escherContainer.getChildById(EscherSpRecord.RECORD_ID);
spRecord.setOptions((short)((ShapeTypes.PictureFrame << 4) | 0x2));
//set default properties for a picture
EscherOptRecord opt = getEscherOptRecord();
setEscherProperty(opt, EscherProperties.PROTECTION__LOCKAGAINSTGROUPING, 0x800080);
//another weird feature of powerpoint: for picture id we must add 0x4000.
setEscherProperty(opt, (short)(EscherProperties.BLIP__BLIPTODISPLAY + 0x4000), idx);
return _escherContainer;
}
/**
* Resize this picture to the default size.
* For PNG and JPEG resizes the image to 100%,
* for other types sets the default size of 200x200 pixels.
*/
public void setDefaultSize(){
PictureData pict = getPictureData();
if (pict instanceof Bitmap){
BufferedImage img = null;
try {
img = ImageIO.read(new ByteArrayInputStream(pict.getData()));
}
catch (IOException e){}
catch (NegativeArraySizeException ne) {}
if(img != null) {
// Valid image, set anchor from it
setAnchor(new java.awt.Rectangle(0, 0, img.getWidth()*POINT_DPI/PIXEL_DPI, img.getHeight()*POINT_DPI/PIXEL_DPI));
} else {
// Invalid image, go with the default metafile size
setAnchor(new java.awt.Rectangle(0, 0, 200, 200));
}
} else {
//default size of a metafile picture is 200x200
setAnchor(new java.awt.Rectangle(50, 50, 200, 200));
}
}
/**
* Returns the picture data for this picture.
*
* @return the picture data for this picture.
*/
public PictureData getPictureData(){
SlideShow ppt = getSheet().getSlideShow();
PictureData[] pict = ppt.getPictureData();
EscherBSERecord bse = getEscherBSERecord();
if (bse == null){
logger.log(POILogger.ERROR, "no reference to picture data found ");
} else {
for ( int i = 0; i < pict.length; i++ ) {
if (pict[i].getOffset() == bse.getOffset()){
return pict[i];
}
}
logger.log(POILogger.ERROR, "no picture found for our BSE offset " + bse.getOffset());
}
return null;
}
protected EscherBSERecord getEscherBSERecord(){
SlideShow ppt = getSheet().getSlideShow();
Document doc = ppt.getDocumentRecord();
EscherContainerRecord dggContainer = doc.getPPDrawingGroup().getDggContainer();
EscherContainerRecord bstore = Shape.getEscherChild(dggContainer, EscherContainerRecord.BSTORE_CONTAINER);
if(bstore == null) {
logger.log(POILogger.DEBUG, "EscherContainerRecord.BSTORE_CONTAINER was not found ");
return null;
}
List lst = bstore.getChildRecords();
int idx = getPictureIndex();
if (idx == 0){
logger.log(POILogger.DEBUG, "picture index was not found, returning ");
return null;
}
return (EscherBSERecord)lst.get(idx-1);
}
/**
* Name of this picture.
*
* @return name of this picture
*/
public String getPictureName(){
EscherOptRecord opt = getEscherOptRecord();
EscherComplexProperty prop = getEscherProperty(opt, EscherProperties.BLIP__BLIPFILENAME);
if (prop == null) return null;
String name = StringUtil.getFromUnicodeLE(prop.getComplexData());
return name.trim();
}
/**
* Name of this picture.
*
* @param name of this picture
*/
public void setPictureName(String name){
EscherOptRecord opt = getEscherOptRecord();
byte[] data = StringUtil.getToUnicodeLE(name + '\u0000');
EscherComplexProperty prop = new EscherComplexProperty(EscherProperties.BLIP__BLIPFILENAME, false, data);
opt.addEscherProperty(prop);
}
/**
* By default set the orininal image size
*/
protected void afterInsert(Sheet sh){
super.afterInsert(sh);
EscherBSERecord bse = getEscherBSERecord();
bse.setRef(bse.getRef() + 1);
java.awt.Rectangle anchor = getAnchor();
if (anchor.equals(new java.awt.Rectangle())){
setDefaultSize();
}
}
public void draw(Graphics2D graphics){
AffineTransform at = graphics.getTransform();
ShapePainter.paint(this, graphics);
PictureData data = getPictureData();
if(data != null) data.draw(graphics, this);
graphics.setTransform(at);
}
/**
* Returns the clipping values as percent ratio relatively to the image size.
* The anchor specified by {@link #getLogicalAnchor2D()} is the displayed size,
* i.e. the size of the already clipped image
*
* @return the clipping as insets converted/scaled to 100000 (=100%)
*/
public Insets getBlipClip() {
EscherOptRecord opt = getEscherOptRecord();
double top = getFractProp(opt, EscherProperties.BLIP__CROPFROMTOP);
double bottom = getFractProp(opt, EscherProperties.BLIP__CROPFROMBOTTOM);
double left = getFractProp(opt, EscherProperties.BLIP__CROPFROMLEFT);
double right = getFractProp(opt, EscherProperties.BLIP__CROPFROMRIGHT);
// if all crop values are zero (the default) then no crop rectangle is set, return null
return (top==0 && bottom==0 && left==0 && right==0)
? null
: new Insets((int)(top*100000), (int)(left*100000), (int)(bottom*100000), (int)(right*100000));
}
/**
* @return the fractional property or 0 if not defined
*/
private static double getFractProp(EscherOptRecord opt, short propertyId) {
EscherSimpleProperty prop = getEscherProperty(opt, propertyId);
if (prop == null) return 0;
int fixedPoint = prop.getPropertyValue();
return Units.fixedPointToDecimal(fixedPoint);
}
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