235 lines
7.7 KiB
Java
235 lines
7.7 KiB
Java
/* ====================================================================
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Licensed to the Apache Software Foundation (ASF) under one or more
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contributor license agreements. See the NOTICE file distributed with
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this work for additional information regarding copyright ownership.
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The ASF licenses this file to You under the Apache License, Version 2.0
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(the "License"); you may not use this file except in compliance with
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the License. You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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==================================================================== */
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package org.apache.poi.hssf.usermodel;
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import java.awt.Dimension;
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import java.io.ByteArrayInputStream;
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import org.apache.poi.ddf.EscherBSERecord;
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import org.apache.poi.ddf.EscherBlipRecord;
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import org.apache.poi.ss.usermodel.Picture;
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import org.apache.poi.ss.util.ImageUtils;
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import org.apache.poi.hssf.model.InternalWorkbook;
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/**
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* Represents a escher picture. Eg. A GIF, JPEG etc...
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*
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* @author Glen Stampoultzis
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* @author Yegor Kozlov (yegor at apache.org)
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*/
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public final class HSSFPicture extends HSSFSimpleShape implements Picture {
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public static final int PICTURE_TYPE_EMF = HSSFWorkbook.PICTURE_TYPE_EMF; // Windows Enhanced Metafile
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public static final int PICTURE_TYPE_WMF = HSSFWorkbook.PICTURE_TYPE_WMF; // Windows Metafile
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public static final int PICTURE_TYPE_PICT = HSSFWorkbook.PICTURE_TYPE_PICT; // Macintosh PICT
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public static final int PICTURE_TYPE_JPEG = HSSFWorkbook.PICTURE_TYPE_JPEG; // JFIF
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public static final int PICTURE_TYPE_PNG = HSSFWorkbook.PICTURE_TYPE_PNG; // PNG
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public static final int PICTURE_TYPE_DIB = HSSFWorkbook.PICTURE_TYPE_DIB; // Windows DIB
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/**
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* width of 1px in columns with default width in units of 1/256 of a character width
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*/
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private static final float PX_DEFAULT = 32.00f;
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/**
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* width of 1px in columns with overridden width in units of 1/256 of a character width
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*/
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private static final float PX_MODIFIED = 36.56f;
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/**
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* Height of 1px of a row
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*/
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private static final int PX_ROW = 15;
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private int _pictureIndex;
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/**
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* Constructs a picture object.
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*/
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public HSSFPicture( HSSFShape parent, HSSFAnchor anchor )
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{
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super( parent, anchor );
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setShapeType(OBJECT_TYPE_PICTURE);
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}
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public int getPictureIndex()
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{
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return _pictureIndex;
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}
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public void setPictureIndex( int pictureIndex )
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{
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this._pictureIndex = pictureIndex;
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}
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/**
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* Resize the image
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* <p>
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* Please note, that this method works correctly only for workbooks
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* with default font size (Arial 10pt for .xls).
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* If the default font is changed the resized image can be streched vertically or horizontally.
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* </p>
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*
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* @param scale the amount by which image dimensions are multiplied relative to the original size.
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* <code>resize(1.0)</code> sets the original size, <code>resize(0.5)</code> resize to 50% of the original,
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* <code>resize(2.0)</code> resizes to 200% of the original.
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*/
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public void resize(double scale){
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HSSFClientAnchor anchor = (HSSFClientAnchor)getAnchor();
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anchor.setAnchorType(2);
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HSSFClientAnchor pref = getPreferredSize(scale);
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int row2 = anchor.getRow1() + (pref.getRow2() - pref.getRow1());
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int col2 = anchor.getCol1() + (pref.getCol2() - pref.getCol1());
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anchor.setCol2((short)col2);
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anchor.setDx1(0);
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anchor.setDx2(pref.getDx2());
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anchor.setRow2(row2);
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anchor.setDy1(0);
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anchor.setDy2(pref.getDy2());
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}
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/**
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* Reset the image to the original size.
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*
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* <p>
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* Please note, that this method works correctly only for workbooks
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* with default font size (Arial 10pt for .xls).
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* If the default font is changed the resized image can be streched vertically or horizontally.
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* </p>
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*/
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public void resize(){
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resize(1.0);
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}
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/**
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* Calculate the preferred size for this picture.
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*
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* @return HSSFClientAnchor with the preferred size for this image
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* @since POI 3.0.2
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*/
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public HSSFClientAnchor getPreferredSize(){
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return getPreferredSize(1.0);
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}
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/**
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* Calculate the preferred size for this picture.
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*
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* @param scale the amount by which image dimensions are multiplied relative to the original size.
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* @return HSSFClientAnchor with the preferred size for this image
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* @since POI 3.0.2
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*/
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public HSSFClientAnchor getPreferredSize(double scale){
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HSSFClientAnchor anchor = (HSSFClientAnchor)getAnchor();
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Dimension size = getImageDimension();
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double scaledWidth = size.getWidth() * scale;
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double scaledHeight = size.getHeight() * scale;
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float w = 0;
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//space in the leftmost cell
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w += getColumnWidthInPixels(anchor.col1)*(1 - (float)anchor.dx1/1024);
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short col2 = (short)(anchor.col1 + 1);
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int dx2 = 0;
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while(w < scaledWidth){
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w += getColumnWidthInPixels(col2++);
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}
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if(w > scaledWidth) {
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//calculate dx2, offset in the rightmost cell
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col2--;
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double cw = getColumnWidthInPixels(col2);
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double delta = w - scaledWidth;
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dx2 = (int)((cw-delta)/cw*1024);
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}
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anchor.col2 = col2;
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anchor.dx2 = dx2;
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float h = 0;
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h += (1 - (float)anchor.dy1/256)* getRowHeightInPixels(anchor.row1);
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int row2 = anchor.row1 + 1;
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int dy2 = 0;
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while(h < scaledHeight){
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h += getRowHeightInPixels(row2++);
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}
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if(h > scaledHeight) {
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row2--;
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double ch = getRowHeightInPixels(row2);
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double delta = h - scaledHeight;
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dy2 = (int)((ch-delta)/ch*256);
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}
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anchor.row2 = row2;
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anchor.dy2 = dy2;
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return anchor;
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}
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private float getColumnWidthInPixels(int column){
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int cw = _patriarch._sheet.getColumnWidth(column);
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float px = getPixelWidth(column);
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return cw/px;
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}
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private float getRowHeightInPixels(int i){
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HSSFRow row = _patriarch._sheet.getRow(i);
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float height;
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if(row != null) height = row.getHeight();
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else height = _patriarch._sheet.getDefaultRowHeight();
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return height/PX_ROW;
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}
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private float getPixelWidth(int column){
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int def = _patriarch._sheet.getDefaultColumnWidth()*256;
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int cw = _patriarch._sheet.getColumnWidth(column);
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return cw == def ? PX_DEFAULT : PX_MODIFIED;
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}
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/**
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* Return the dimension of this image
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*
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* @return image dimension
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*/
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public Dimension getImageDimension(){
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EscherBSERecord bse = _patriarch._sheet._book.getBSERecord(_pictureIndex);
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byte[] data = bse.getBlipRecord().getPicturedata();
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int type = bse.getBlipTypeWin32();
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return ImageUtils.getImageDimension(new ByteArrayInputStream(data), type);
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}
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/**
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* Return picture data for this shape
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*
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* @return picture data for this shape
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*/
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public HSSFPictureData getPictureData(){
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InternalWorkbook iwb = _patriarch._sheet.getWorkbook().getWorkbook();
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EscherBlipRecord blipRecord = iwb.getBSERecord(_pictureIndex).getBlipRecord();
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return new HSSFPictureData(blipRecord);
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}
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}
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