Picture method to resize with different scales in width and height

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1638623 13f79535-47bb-0310-9956-ffa450edef68

src/java/org/apache/poi/hssf/usermodel/HSSFPicture.java

@@ -21,7 +21,17 @@ import java.awt.Dimension;
 import java.io.ByteArrayInputStream;
 import java.io.UnsupportedEncodingException;
 
-import org.apache.poi.ddf.*;
+import org.apache.poi.ddf.DefaultEscherRecordFactory;
+import org.apache.poi.ddf.EscherBSERecord;
+import org.apache.poi.ddf.EscherBlipRecord;
+import org.apache.poi.ddf.EscherClientDataRecord;
+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.EscherSimpleProperty;
+import org.apache.poi.ddf.EscherTextboxRecord;
+import org.apache.poi.hssf.model.InternalWorkbook;
 import org.apache.poi.hssf.record.CommonObjectDataSubRecord;
 import org.apache.poi.hssf.record.EscherAggregate;
 import org.apache.poi.hssf.record.ObjRecord;
@@ -29,7 +39,6 @@ import org.apache.poi.ss.usermodel.Picture;
 import org.apache.poi.ss.util.ImageUtils;
 import org.apache.poi.util.POILogFactory;
 import org.apache.poi.util.POILogger;
-import org.apache.poi.hssf.model.InternalWorkbook;
 
 /**
  * Represents a escher picture.  Eg. A GIF, JPEG etc...
@@ -44,20 +53,6 @@ public class HSSFPicture extends HSSFSimpleShape implements Picture {
     public static final int PICTURE_TYPE_PNG = HSSFWorkbook.PICTURE_TYPE_PNG;                // PNG
     public static final int PICTURE_TYPE_DIB = HSSFWorkbook.PICTURE_TYPE_DIB;                // Windows DIB
 
-    /**
-     * width of 1px in columns with default width in units of 1/256 of a character width
-     */
-    private static final float PX_DEFAULT = 32.00f;
-    /**
-     * width of 1px in columns with overridden width in units of 1/256 of a character width
-     */
-    private static final float PX_MODIFIED = 36.56f;
-
-    /**
-     * Height of 1px of a row
-     */
-    private static final int PX_ROW = 15;
-
     public HSSFPicture(EscherContainerRecord spContainer, ObjRecord objRecord) {
         super(spContainer, objRecord);
     }
@@ -98,37 +93,7 @@ public class HSSFPicture extends HSSFSimpleShape implements Picture {
     }
 
     /**
-     * Resize the image
+     * Reset the image to the dimension of the embedded image
-     * <p>
-     * Please note, that this method works correctly only for workbooks
-     * with default font size (Arial 10pt for .xls).
-     * If the default font is changed the resized image can be streched vertically or horizontally.
-     * </p>
-     *
-     * @param scale the amount by which image dimensions are multiplied relative to the original size.
-     * <code>resize(1.0)</code> sets the original size, <code>resize(0.5)</code> resize to 50% of the original,
-     * <code>resize(2.0)</code> resizes to 200% of the original.
-     */
-    public void resize(double scale){
-        HSSFClientAnchor anchor = (HSSFClientAnchor)getAnchor();
-        anchor.setAnchorType(2);
-
-        HSSFClientAnchor pref = getPreferredSize(scale);
-
-        int row2 = anchor.getRow1() + (pref.getRow2() - pref.getRow1());
-        int col2 = anchor.getCol1() + (pref.getCol2() - pref.getCol1());
-
-        anchor.setCol2((short)col2);
-        anchor.setDx1(0);
-        anchor.setDx2(pref.getDx2());
-
-        anchor.setRow2(row2);
-        anchor.setDy1(0);
-        anchor.setDy2(pref.getDy2());
-    }
-
-    /**
-     * Reset the image to the original size.
      * 
      * <p>
      * Please note, that this method works correctly only for workbooks
@@ -137,7 +102,51 @@ public class HSSFPicture extends HSSFSimpleShape implements Picture {
      * </p>
      */
     public void resize(){
-        resize(1.0);
+        resize(Double.MAX_VALUE);
+    }
+
+    /**
+     * Resize the image proportionally.
+     *
+     * @see #resize(double, double)
+     */
+    public void resize(double scale) {
+        resize(scale,scale);
+    }
+    
+    /**
+     * Resize the image
+     * <p>
+     * Please note, that this method works correctly only for workbooks
+     * with default font size (Arial 10pt for .xls).
+     * If the default font is changed the resized image can be streched vertically or horizontally.
+     * </p>
+     * <p>
+     * <code>resize(1.0,1.0)</code> keeps the original size,<br/>
+     * <code>resize(0.5,0.5)</code> resize to 50% of the original,<br/>
+     * <code>resize(2.0,2.0)</code> resizes to 200% of the original.<br/>
+     * <code>resize({@link Double#MAX_VALUE},{@link Double#MAX_VALUE})</code> resizes to the dimension of the embedded image. 
+     * </p>
+     *
+     * @param scaleX the amount by which the image width is multiplied relative to the original width.
+     * @param scaleY the amount by which the image height is multiplied relative to the original height.
+     */
+    public void resize(double scaleX, double scaleY) {
+        HSSFClientAnchor anchor = getClientAnchor();
+        anchor.setAnchorType(2);
+
+        HSSFClientAnchor pref = getPreferredSize(scaleX,scaleY);
+
+        int row2 = anchor.getRow1() + (pref.getRow2() - pref.getRow1());
+        int col2 = anchor.getCol1() + (pref.getCol2() - pref.getCol1());
+
+        anchor.setCol2((short)col2);
+        // anchor.setDx1(0);
+        anchor.setDx2(pref.getDx2());
+
+        anchor.setRow2(row2);
+        // anchor.setDy1(0);
+        anchor.setDy2(pref.getDy2());
     }
 
     /**
@@ -158,86 +167,30 @@ public class HSSFPicture extends HSSFSimpleShape implements Picture {
      * @since POI 3.0.2
      */
     public HSSFClientAnchor getPreferredSize(double scale){
-        HSSFClientAnchor anchor = (HSSFClientAnchor)getAnchor();
+        return getPreferredSize(scale, scale);
-
-        Dimension size = getImageDimension();
-        double scaledWidth = size.getWidth() * scale;
-        double scaledHeight = size.getHeight() * scale;
-
-        float w = 0;
-
-        //space in the leftmost cell
-        w += getColumnWidthInPixels(anchor.getCol1())*(1 - (float)anchor.getDx1()/1024);
-        short col2 = (short)(anchor.getCol1() + 1);
-        int dx2 = 0;
-
-        while(w < scaledWidth){
-            w += getColumnWidthInPixels(col2++);
-        }
-
-        if(w > scaledWidth) {
-            //calculate dx2, offset in the rightmost cell
-            col2--;
-            double cw = getColumnWidthInPixels(col2);
-            double delta = w - scaledWidth;
-            dx2 = (int)((cw-delta)/cw*1024);
-        }
-        anchor.setCol2(col2);
-        anchor.setDx2(dx2);
-
-        float h = 0;
-        h += (1 - (float)anchor.getDy1()/256)* getRowHeightInPixels(anchor.getRow1());
-        int row2 = anchor.getRow1() + 1;
-        int dy2 = 0;
-
-        while(h < scaledHeight){
-            h += getRowHeightInPixels(row2++);
-        }
-        if(h > scaledHeight) {
-            row2--;
-            double ch = getRowHeightInPixels(row2);
-            double delta = h - scaledHeight;
-            dy2 = (int)((ch-delta)/ch*256);
-        }
-        anchor.setRow2(row2);
-        anchor.setDy2(dy2);
-
-        return anchor;
-    }
-
-    private float getColumnWidthInPixels(int column){
-
-        int cw = getPatriarch().getSheet().getColumnWidth(column);
-        float px = getPixelWidth(column);
-
-        return cw/px;
-    }
-
-    private float getRowHeightInPixels(int i){
-
-        HSSFRow row = getPatriarch().getSheet().getRow(i);
-        float height;
-        if(row != null) height = row.getHeight();
-        else height = getPatriarch().getSheet().getDefaultRowHeight();
-
-        return height/PX_ROW;
-    }
-
-    private float getPixelWidth(int column){
-
-        int def = getPatriarch().getSheet().getDefaultColumnWidth()*256;
-        int cw = getPatriarch().getSheet().getColumnWidth(column);
-
-        return cw == def ? PX_DEFAULT : PX_MODIFIED;
     }
     
     /**
-     * Return the dimension of this image
+     * Calculate the preferred size for this picture.
      *
-     * @return image dimension
+     * @param scaleX the amount by which image width is multiplied relative to the original width.
+     * @param scaleY the amount by which image height is multiplied relative to the original height.
+     * @return HSSFClientAnchor with the preferred size for this image
+     * @since POI 3.11
+     */
+    public HSSFClientAnchor getPreferredSize(double scaleX, double scaleY){
+        ImageUtils.setPreferredSize(this, scaleX, scaleY);
+        return getClientAnchor();
+    }
+
+    /**
+     * Return the dimension of the embedded image in pixel
+     *
+     * @return image dimension in pixels
      */
     public Dimension getImageDimension(){
-        EscherBSERecord bse = getPatriarch().getSheet()._book.getBSERecord(getPictureIndex());
+        InternalWorkbook iwb = getPatriarch().getSheet().getWorkbook().getWorkbook();
+        EscherBSERecord bse = iwb.getBSERecord(getPictureIndex());
         byte[] data = bse.getBlipRecord().getPicturedata();
         int type = bse.getBlipTypeWin32();
         return ImageUtils.getImageDimension(new ByteArrayInputStream(data), type);
@@ -250,7 +203,8 @@ public class HSSFPicture extends HSSFSimpleShape implements Picture {
      */
     public HSSFPictureData getPictureData(){
         InternalWorkbook iwb = getPatriarch().getSheet().getWorkbook().getWorkbook();
-    	EscherBlipRecord blipRecord = iwb.getBSERecord(getPictureIndex()).getBlipRecord();
+        EscherBSERecord bse = iwb.getBSERecord(getPictureIndex());
+    	EscherBlipRecord blipRecord = bse.getBlipRecord();
     	return new HSSFPictureData(blipRecord);
     }
 
@@ -301,4 +255,22 @@ public class HSSFPicture extends HSSFSimpleShape implements Picture {
         ObjRecord obj = (ObjRecord) getObjRecord().cloneViaReserialise();
         return new HSSFPicture(spContainer, obj);
     }
+    
+    /**
+     * @return the anchor that is used by this picture.
+     */
+    @Override
+    public HSSFClientAnchor getClientAnchor() {
+        HSSFAnchor a = getAnchor();
+        return (a instanceof HSSFClientAnchor) ? (HSSFClientAnchor)a : null;
+    }
+
+    
+    /**
+     * @return the sheet which contains the picture shape
+     */
+    @Override
+    public HSSFSheet getSheet() {
+        return getPatriarch().getSheet();
+    }
 }

src/java/org/apache/poi/hssf/usermodel/HSSFPictureData.java

@@ -22,6 +22,7 @@ import org.apache.poi.ddf.EscherBitmapBlip;
 import org.apache.poi.ddf.EscherBlipRecord;
 import org.apache.poi.ddf.EscherMetafileBlip;
 import org.apache.poi.ss.usermodel.PictureData;
+import org.apache.poi.ss.usermodel.Workbook;
 import org.apache.poi.util.PngUtils;
 
 /**
@@ -131,4 +132,33 @@ public class HSSFPictureData implements PictureData
                return "image/unknown";
        }
     }
+    
+    /**
+     * @return the POI internal image type, -1 if not unknown image type
+     *
+     * @see Workbook#PICTURE_TYPE_DIB
+     * @see Workbook#PICTURE_TYPE_EMF
+     * @see Workbook#PICTURE_TYPE_JPEG
+     * @see Workbook#PICTURE_TYPE_PICT
+     * @see Workbook#PICTURE_TYPE_PNG
+     * @see Workbook#PICTURE_TYPE_WMF
+     */
+    public int getPictureType() {
+        switch (blip.getRecordId()) {
+            case EscherMetafileBlip.RECORD_ID_WMF:
+                return Workbook.PICTURE_TYPE_WMF;
+            case EscherMetafileBlip.RECORD_ID_EMF:
+                return Workbook.PICTURE_TYPE_EMF;
+            case EscherMetafileBlip.RECORD_ID_PICT:
+                return Workbook.PICTURE_TYPE_PICT;
+            case EscherBitmapBlip.RECORD_ID_PNG:
+                return Workbook.PICTURE_TYPE_PNG;
+            case EscherBitmapBlip.RECORD_ID_JPEG:
+                return Workbook.PICTURE_TYPE_JPEG;
+            case EscherBitmapBlip.RECORD_ID_DIB:
+                return Workbook.PICTURE_TYPE_DIB;
+            default:
+                return -1;
+        }        
+    }
 }

src/java/org/apache/poi/hssf/usermodel/HSSFSheet.java

@@ -76,6 +76,16 @@ public final class HSSFSheet implements org.apache.poi.ss.usermodel.Sheet {
     private static final POILogger log = POILogFactory.getLogger(HSSFSheet.class);
     private static final int DEBUG = POILogger.DEBUG;
 
+    /**
+     * width of 1px in columns with default width in units of 1/256 of a character width
+     */
+    private static final float PX_DEFAULT = 32.00f;
+    /**
+     * width of 1px in columns with overridden width in units of 1/256 of a character width
+     */
+    private static final float PX_MODIFIED = 36.56f;
+
+    
     /**
      * Used for compile-time optimization.  This is the initial size for the collection of
      * rows.  It is currently set to 20.  If you generate larger sheets you may benefit
@@ -555,6 +565,14 @@ public final class HSSFSheet implements org.apache.poi.ss.usermodel.Sheet {
         return _sheet.getColumnWidth(columnIndex);
     }
 
+    public float getColumnWidthInPixels(int column){
+        int cw = getColumnWidth(column);
+        int def = getDefaultColumnWidth()*256;
+        float px = (cw == def ? PX_DEFAULT : PX_MODIFIED);
+
+        return cw/px;
+    }
+    
     /**
      * get the default column width for the sheet (if the columns do not define their own width) in
      * characters

src/java/org/apache/poi/ss/usermodel/Picture.java

@@ -16,6 +16,9 @@
 ==================================================================== */
 package org.apache.poi.ss.usermodel;
 
+import java.awt.Dimension;
+
+
 /**
  * Repersents a picture in a SpreadsheetML document
  *
@@ -24,33 +27,61 @@ package org.apache.poi.ss.usermodel;
 public interface Picture {
 
     /**
-     * Reset the image to the original size.
+     * Reset the image to the dimension of the embedded image
      *
-     * <p>
+     * @see #resize(double, double)
-     * Please note, that this method works correctly only for workbooks
-     * with default font size (Arial 10pt for .xls and Calibri 11pt for .xlsx).
-     * If the default font is changed the resized image can be streched vertically or horizontally.
-     * </p>
      */
     void resize();
 
     /**
-     * Reset the image to the original size.
+     * Resize the image proportionally.
      *
-     * <p>
+     * @see #resize(double, double)
-     * Please note, that this method works correctly only for workbooks
-     * with default font size (Arial 10pt for .xls and Calibri 11pt for .xlsx).
-     * If the default font is changed the resize() procedure can be 'off'.
-     * </p>
-     *
-     * @param scale the amount by which image dimensions are multiplied relative to the original size.
-     * <code>resize(1.0)</code> sets the original size, <code>resize(0.5)</code> resize to 50% of the original,
-     * <code>resize(2.0)</code> resizes to 200% of the original.
      */
     void resize(double scale);
     
+    /**
+     * Resize the image.
+     * <p>
+     * Please note, that this method works correctly only for workbooks
+     * with the default font size (Arial 10pt for .xls and Calibri 11pt for .xlsx).
+     * If the default font is changed the resized image can be streched vertically or horizontally.
+     * </p>
+     * <p>
+     * <code>resize(1.0,1.0)</code> keeps the original size,<br/>
+     * <code>resize(0.5,0.5)</code> resize to 50% of the original,<br/>
+     * <code>resize(2.0,2.0)</code> resizes to 200% of the original.<br/>
+     * <code>resize({@link Double#MAX_VALUE},{@link Double#MAX_VALUE})</code> resizes to the dimension of the embedded image. 
+     * </p>
+     *
+     * @param scaleX the amount by which the image width is multiplied relative to the original width.
+     * @param scaleY the amount by which the image height is multiplied relative to the original height.
+     */
+    void resize(double scaleX, double scaleY);
+
+    /**
+     * Calculate the preferred size for this picture.
+     *
+     * @return XSSFClientAnchor with the preferred size for this image
+     */
     ClientAnchor getPreferredSize();
     
+    /**
+     * Calculate the preferred size for this picture.
+     *
+     * @param scaleX the amount by which image width is multiplied relative to the original width.
+     * @param scaleY the amount by which image height is multiplied relative to the original height.
+     * @return ClientAnchor with the preferred size for this image
+     */
+    ClientAnchor getPreferredSize(double scaleX, double scaleY);
+
+    /**
+     * Return the dimension of the embedded image in pixel
+     *
+     * @return image dimension in pixels
+     */
+    Dimension getImageDimension();
+    
     /**
      * Return picture data for this picture
      *
@@ -58,4 +89,14 @@ public interface Picture {
      */
     PictureData getPictureData();
 
+    /**
+     * @return  the anchor that is used by this picture
+     */
+    ClientAnchor getClientAnchor();
+
+
+    /**
+     * @return the sheet which contains the picture
+     */
+    Sheet getSheet();
 }

src/java/org/apache/poi/ss/usermodel/PictureData.java

@@ -37,4 +37,16 @@ public interface PictureData {
      * Returns the mime type for the image
      */
     String getMimeType();
+    
+    /**
+     * @return the POI internal image type, 0 if unknown image type
+     *
+     * @see Workbook#PICTURE_TYPE_DIB
+     * @see Workbook#PICTURE_TYPE_EMF
+     * @see Workbook#PICTURE_TYPE_JPEG
+     * @see Workbook#PICTURE_TYPE_PICT
+     * @see Workbook#PICTURE_TYPE_PNG
+     * @see Workbook#PICTURE_TYPE_WMF
+     */
+    int getPictureType();
 }

src/java/org/apache/poi/ss/usermodel/Sheet.java

@@ -186,11 +186,26 @@ public interface Sheet extends Iterable<Row> {
      * using the default font (first font in the workbook)
      * </p>
      *
-     * @param columnIndex - the column to set (0-based)
+     * @param columnIndex - the column to get (0-based)
      * @return width - the width in units of 1/256th of a character width
      */
     int getColumnWidth(int columnIndex);
 
+    /**
+     * get the width in pixel
+     * 
+     * <p>
+     * Please note, that this method works correctly only for workbooks
+     * with the default font size (Arial 10pt for .xls and Calibri 11pt for .xlsx).
+     * If the default font is changed the column width can be streched
+     * </p>
+     *
+     * @param columnIndex - the column to set (0-based)
+     * @return width in pixels
+     */
+    float getColumnWidthInPixels(int columnIndex);
+    
+    
     /**
      * Set the default column width for the sheet (if the columns do not define their own width)
      * in characters
@@ -922,7 +937,7 @@ public interface Sheet extends Iterable<Row> {
     
     public DataValidationHelper getDataValidationHelper();
 
-    /**
+	/**
      * Returns the list of DataValidation in the sheet.
      * @return list of DataValidation in the sheet
      */

src/java/org/apache/poi/ss/util/ImageUtils.java

@@ -16,21 +16,32 @@
 ==================================================================== */
 package org.apache.poi.ss.util;
 
-import org.w3c.dom.NodeList;
+import static org.apache.poi.util.Units.EMU_PER_PIXEL;
-import org.w3c.dom.Element;
-import org.apache.poi.ss.usermodel.Workbook;
-import org.apache.poi.util.POILogger;
-import org.apache.poi.util.POILogFactory;
 
-import javax.imageio.ImageReader;
+import java.awt.Dimension;
-import javax.imageio.ImageIO;
+import java.awt.image.BufferedImage;
-import javax.imageio.stream.ImageInputStream;
+import java.io.ByteArrayInputStream;
 import java.io.IOException;
 import java.io.InputStream;
-import java.awt.*;
-import java.awt.image.BufferedImage;
 import java.util.Iterator;
 
+import javax.imageio.ImageIO;
+import javax.imageio.ImageReader;
+import javax.imageio.stream.ImageInputStream;
+
+import org.apache.poi.hssf.usermodel.HSSFClientAnchor;
+import org.apache.poi.ss.usermodel.ClientAnchor;
+import org.apache.poi.ss.usermodel.Picture;
+import org.apache.poi.ss.usermodel.PictureData;
+import org.apache.poi.ss.usermodel.Row;
+import org.apache.poi.ss.usermodel.Sheet;
+import org.apache.poi.ss.usermodel.Workbook;
+import org.apache.poi.util.POILogFactory;
+import org.apache.poi.util.POILogger;
+import org.apache.poi.util.Units;
+import org.w3c.dom.Element;
+import org.w3c.dom.NodeList;
+
 /**
  * @author Yegor Kozlov
  */
@@ -60,8 +71,8 @@ public class ImageUtils {
                 try {
                     //read the image using javax.imageio.*
                     ImageInputStream iis = ImageIO.createImageInputStream( is );
-                    Iterator i = ImageIO.getImageReaders( iis );
+                    Iterator<ImageReader> i = ImageIO.getImageReaders( iis );
-                    ImageReader r = (ImageReader) i.next();
+                    ImageReader r = i.next();
                     r.setInput( iis );
                     BufferedImage img = r.read(0);
 
@@ -113,4 +124,154 @@ public class ImageUtils {
         return new int[]{hdpi, vdpi};
     }
 
+    /**
+     * Calculate and set the preferred size (anchor) for this picture.
+     *
+     * @param scaleX the amount by which image width is multiplied relative to the original width.
+     * @param scaleY the amount by which image height is multiplied relative to the original height.
+     * @return the new Dimensions of the scaled picture in EMUs
+     */
+    public static Dimension setPreferredSize(Picture picture, double scaleX, double scaleY){
+        ClientAnchor anchor = picture.getClientAnchor();
+        boolean isHSSF = (anchor instanceof HSSFClientAnchor);
+        PictureData data = picture.getPictureData();
+        Sheet sheet = picture.getSheet();
+        
+        // in pixel
+        Dimension imgSize = getImageDimension(new ByteArrayInputStream(data.getData()), data.getPictureType());
+        // in emus
+        Dimension anchorSize = ImageUtils.getDimensionFromAnchor(picture);
+        final double scaledWidth = (scaleX == Double.MAX_VALUE)
+            ? imgSize.getWidth() : anchorSize.getWidth()/EMU_PER_PIXEL * scaleX;
+        final double scaledHeight = (scaleY == Double.MAX_VALUE)
+            ? imgSize.getHeight() : anchorSize.getHeight()/EMU_PER_PIXEL * scaleY;
+
+        double w = 0;
+        int col2 = anchor.getCol1();
+        int dx2 = 0;
+
+        //space in the leftmost cell
+        w = sheet.getColumnWidthInPixels(col2++);
+        if (isHSSF) {
+            w *= 1 - anchor.getDx1()/1024d;
+        } else {
+            w -= anchor.getDx1()/EMU_PER_PIXEL;
+        }
+        
+        while(w < scaledWidth){
+            w += sheet.getColumnWidthInPixels(col2++);
+        }
+        
+        if(w > scaledWidth) {
+            //calculate dx2, offset in the rightmost cell
+            double cw = sheet.getColumnWidthInPixels(--col2);
+            double delta = w - scaledWidth;
+            if (isHSSF) {
+                dx2 = (int)((cw-delta)/cw*1024);
+            } else {
+                dx2 = (int)((cw-delta)*EMU_PER_PIXEL);
+            }
+            if (dx2 < 0) dx2 = 0;
+        }
+        anchor.setCol2(col2);
+        anchor.setDx2(dx2);
+
+        double h = 0;
+        int row2 = anchor.getRow1();
+        int dy2 = 0;
+        
+        h = getRowHeightInPixels(sheet,row2++);
+        if (isHSSF) {
+            h *= 1 - anchor.getDy1()/256d;
+        } else {
+            h -= anchor.getDy1()/EMU_PER_PIXEL;
+        }
+
+        while(h < scaledHeight){
+            h += getRowHeightInPixels(sheet,row2++);
+        }
+        
+        if(h > scaledHeight) {
+            double ch = getRowHeightInPixels(sheet,--row2);
+            double delta = h - scaledHeight;
+            if (isHSSF) {
+                dy2 = (int)((ch-delta)/ch*256);
+            } else {
+                dy2 = (int)((ch-delta)*EMU_PER_PIXEL);
+            }
+            if (dy2 < 0) dy2 = 0;
+        }
+
+        anchor.setRow2(row2);
+        anchor.setDy2(dy2);
+
+        Dimension dim = new Dimension(
+            (int)Math.round(scaledWidth*EMU_PER_PIXEL),
+            (int)Math.round(scaledHeight*EMU_PER_PIXEL)
+        );
+        
+        return dim;
+    }
+
+    /**
+     * Calculates the dimensions in EMUs for the anchor of the given picture
+     *
+     * @param picture the picture containing the anchor
+     * @return the dimensions in EMUs
+     */
+    public static Dimension getDimensionFromAnchor(Picture picture) {
+        ClientAnchor anchor = picture.getClientAnchor();
+        boolean isHSSF = (anchor instanceof HSSFClientAnchor);
+        Sheet sheet = picture.getSheet();
+
+        double w = 0;
+        int col2 = anchor.getCol1();
+
+        //space in the leftmost cell
+        w = sheet.getColumnWidthInPixels(col2++);
+        if (isHSSF) {
+            w *= 1 - anchor.getDx1()/1024d;
+        } else {
+            w -= anchor.getDx1()/EMU_PER_PIXEL;
+        }
+        
+        while(col2 < anchor.getCol2()){
+            w += sheet.getColumnWidthInPixels(col2++);
+        }
+        
+        if (isHSSF) {
+            w += sheet.getColumnWidthInPixels(col2) * anchor.getDx2()/1024d;
+        } else {
+            w += anchor.getDx2()/EMU_PER_PIXEL;
+        }
+
+        double h = 0;
+        int row2 = anchor.getRow1();
+        
+        h = getRowHeightInPixels(sheet,row2++);
+        if (isHSSF) {
+            h *= 1 - anchor.getDy1()/256d;
+        } else {
+            h -= anchor.getDy1()/EMU_PER_PIXEL;
+        }
+
+        while(row2 < anchor.getRow2()){
+            h += getRowHeightInPixels(sheet,row2++);
+        }
+        
+        if (isHSSF) {
+            h += getRowHeightInPixels(sheet,row2) * anchor.getDy2()/256;
+        } else {
+            h += anchor.getDy2()/EMU_PER_PIXEL;
+        }
+
+        return new Dimension((int)w*EMU_PER_PIXEL, (int)h*EMU_PER_PIXEL);
+    }
+    
+    
+    private static double getRowHeightInPixels(Sheet sheet, int rowNum) {
+        Row r = sheet.getRow(rowNum);
+        double points = (r == null) ? sheet.getDefaultRowHeightInPoints() : r.getHeightInPoints();
+        return Units.toEMU(points)/EMU_PER_PIXEL;
+    }
 }

src/java/org/apache/poi/util/Units.java

@@ -23,10 +23,20 @@ public class Units {
     public static final int EMU_PER_PIXEL = 9525;
     public static final int EMU_PER_POINT = 12700;
 
-    public static int toEMU(double value){
+    /**
-        return (int)Math.round(EMU_PER_POINT*value);
+     * Converts points to EMUs
+     * @param points points
+     * @return emus
+     */
+    public static int toEMU(double points){
+        return (int)Math.round(EMU_PER_POINT*points);
     }
 
+    /**
+     * Converts EMUs to points
+     * @param emu emu
+     * @return points
+     */
     public static double toPoints(long emu){
         return (double)emu/EMU_PER_POINT;
     }

src/ooxml/java/org/apache/poi/xssf/streaming/SXSSFSheet.java

@@ -264,6 +264,19 @@ public class SXSSFSheet implements Sheet, Cloneable
         return _sh.getColumnWidth(columnIndex);
     }
 
+    /**
+     * Get the actual column width in pixels
+     * 
+     * <p>
+     * Please note, that this method works correctly only for workbooks
+     * with the default font size (Calibri 11pt for .xlsx).
+     * </p>
+     */
+    @Override
+    public float getColumnWidthInPixels(int columnIndex) {
+        return _sh.getColumnWidthInPixels(columnIndex);
+    }    
+    
     /**
      * Set the default column width for the sheet (if the columns do not define their own width)
      * in characters

src/ooxml/java/org/apache/poi/xssf/usermodel/XSSFPicture.java

@@ -20,15 +20,14 @@ package org.apache.poi.xssf.usermodel;
 import java.awt.Dimension;
 import java.io.IOException;
 
-import org.apache.poi.POIXMLDocumentPart;
 import org.apache.poi.openxml4j.opc.PackagePart;
 import org.apache.poi.openxml4j.opc.PackageRelationship;
 import org.apache.poi.ss.usermodel.Picture;
 import org.apache.poi.ss.usermodel.Workbook;
 import org.apache.poi.ss.util.ImageUtils;
+import org.apache.poi.util.Internal;
 import org.apache.poi.util.POILogFactory;
 import org.apache.poi.util.POILogger;
-import org.apache.poi.util.Internal;
 import org.openxmlformats.schemas.drawingml.x2006.main.CTBlipFillProperties;
 import org.openxmlformats.schemas.drawingml.x2006.main.CTNonVisualDrawingProps;
 import org.openxmlformats.schemas.drawingml.x2006.main.CTNonVisualPictureProperties;
@@ -40,7 +39,6 @@ import org.openxmlformats.schemas.drawingml.x2006.main.CTTransform2D;
 import org.openxmlformats.schemas.drawingml.x2006.main.STShapeType;
 import org.openxmlformats.schemas.drawingml.x2006.spreadsheetDrawing.CTPicture;
 import org.openxmlformats.schemas.drawingml.x2006.spreadsheetDrawing.CTPictureNonVisual;
-import org.openxmlformats.schemas.spreadsheetml.x2006.main.CTCol;
 
 /**
  * Represents a picture shape in a SpreadsheetML drawing.
@@ -57,7 +55,7 @@ public final class XSSFPicture extends XSSFShape implements Picture {
      *
      * This value is the same for default font in Office 2007 (Calibry) and Office 2003 and earlier (Arial)
      */
-    private static float DEFAULT_COLUMN_WIDTH = 9.140625f;
+    // private static float DEFAULT_COLUMN_WIDTH = 9.140625f;
 
     /**
      * A default instance of CTShape used for creating new shapes.
@@ -140,44 +138,56 @@ public final class XSSFPicture extends XSSFShape implements Picture {
     }
 
     /**
-     * Reset the image to the original size.
+     * Reset the image to the dimension of the embedded image
      *
-     * <p>
+     * @see #resize(double, double)
-     * Please note, that this method works correctly only for workbooks
-     * with the default font size (Calibri 11pt for .xlsx).
-     * If the default font is changed the resized image can be streched vertically or horizontally.
-     * </p>
      */
     public void resize(){
-        resize(1.0);
+        resize(Double.MAX_VALUE);
     }
 
     /**
-     * Reset the image to the original size.
+     * Resize the image proportionally.
+     *
+     * @see #resize(double, double)
+     */
+    public void resize(double scale) {
+        resize(scale, scale);
+    }
+    
+    /**
+     * Resize the image relatively to its current size.
      * <p>
      * Please note, that this method works correctly only for workbooks
      * with the default font size (Calibri 11pt for .xlsx).
      * If the default font is changed the resized image can be streched vertically or horizontally.
      * </p>
+     * <p>
+     * <code>resize(1.0,1.0)</code> keeps the original size,<br/>
+     * <code>resize(0.5,0.5)</code> resize to 50% of the original,<br/>
+     * <code>resize(2.0,2.0)</code> resizes to 200% of the original.<br/>
+     * <code>resize({@link Double#MAX_VALUE},{@link Double#MAX_VALUE})</code> resizes to the dimension of the embedded image. 
+     * </p>
      *
-     * @param scale the amount by which image dimensions are multiplied relative to the original size.
+     * @param scaleX the amount by which the image width is multiplied relative to the original width,
-     * <code>resize(1.0)</code> sets the original size, <code>resize(0.5)</code> resize to 50% of the original,
+     *  when set to {@link java.lang.Double#MAX_VALUE} the width of the embedded image is used
-     * <code>resize(2.0)</code> resizes to 200% of the original.
+     * @param scaleY the amount by which the image height is multiplied relative to the original height,
+     *  when set to {@link java.lang.Double#MAX_VALUE} the height of the embedded image is used
      */
-    public void resize(double scale){
+    public void resize(double scaleX, double scaleY){
-        XSSFClientAnchor anchor = (XSSFClientAnchor)getAnchor();
+        XSSFClientAnchor anchor = getClientAnchor();
 
-        XSSFClientAnchor pref = getPreferredSize(scale);
+        XSSFClientAnchor pref = getPreferredSize(scaleX,scaleY);
 
         int row2 = anchor.getRow1() + (pref.getRow2() - pref.getRow1());
         int col2 = anchor.getCol1() + (pref.getCol2() - pref.getCol1());
 
         anchor.setCol2(col2);
-        anchor.setDx1(0);
+        // anchor.setDx1(0);
         anchor.setDx2(pref.getDx2());
 
         anchor.setRow2(row2);
-        anchor.setDy1(0);
+        // anchor.setDy1(0);
         anchor.setDy2(pref.getDy2());
     }
 
@@ -197,71 +207,22 @@ public final class XSSFPicture extends XSSFShape implements Picture {
      * @return XSSFClientAnchor with the preferred size for this image
      */
     public XSSFClientAnchor getPreferredSize(double scale){
-        XSSFClientAnchor anchor = (XSSFClientAnchor)getAnchor();
+        return getPreferredSize(scale, scale);
-
+    }
-        XSSFPictureData data = getPictureData();
-        Dimension size = getImageDimension(data.getPackagePart(), data.getPictureType());
-        double scaledWidth = size.getWidth() * scale;
-        double scaledHeight = size.getHeight() * scale;
-
-        float w = 0;
-        int col2 = anchor.getCol1();
-        int dx2 = 0;
-
-        for (;;) {
-            w += getColumnWidthInPixels(col2);
-            if(w > scaledWidth) break;
-            col2++;
-        }
-
-        if(w > scaledWidth) {
-            double cw = getColumnWidthInPixels(col2 );
-            double delta = w - scaledWidth;
-            dx2 = (int)(EMU_PER_PIXEL*(cw-delta));
-        }
-        anchor.setCol2(col2);
-        anchor.setDx2(dx2);
-
-        double h = 0;
-        int row2 = anchor.getRow1();
-        int dy2 = 0;
-
-        for (;;) {
-            h += getRowHeightInPixels(row2);
-            if(h > scaledHeight) break;
-            row2++;
-        }
-
-        if(h > scaledHeight) {
-            double ch = getRowHeightInPixels(row2);
-            double delta = h - scaledHeight;
-            dy2 = (int)(EMU_PER_PIXEL*(ch-delta));
-        }
-        anchor.setRow2(row2);
-        anchor.setDy2(dy2);
     
+    /**
+     * Calculate the preferred size for this picture.
+     *
+     * @param scaleX the amount by which image width is multiplied relative to the original width.
+     * @param scaleY the amount by which image height is multiplied relative to the original height.
+     * @return XSSFClientAnchor with the preferred size for this image
+     */
+    public XSSFClientAnchor getPreferredSize(double scaleX, double scaleY){
+        Dimension dim = ImageUtils.setPreferredSize(this, scaleX, scaleY);
         CTPositiveSize2D size2d =  ctPicture.getSpPr().getXfrm().getExt();
-        size2d.setCx((long)(scaledWidth*EMU_PER_PIXEL));
+        size2d.setCx((int)dim.getWidth());
-        size2d.setCy((long)(scaledHeight*EMU_PER_PIXEL));
+        size2d.setCy((int)dim.getHeight());
-
+        return getClientAnchor();
-        return anchor;
-    }
-
-    private float getColumnWidthInPixels(int columnIndex){
-        XSSFSheet sheet = (XSSFSheet)getDrawing().getParent();
-
-        CTCol col = sheet.getColumnHelper().getColumn(columnIndex, false);
-        double numChars = col == null || !col.isSetWidth() ? DEFAULT_COLUMN_WIDTH : col.getWidth();
-
-        return (float)numChars*XSSFWorkbook.DEFAULT_CHARACTER_WIDTH;
-    }
-
-    private float getRowHeightInPixels(int rowIndex){
-        XSSFSheet sheet = (XSSFSheet)getDrawing().getParent();
-
-        XSSFRow row = sheet.getRow(rowIndex);
-        float height = row != null ?  row.getHeightInPoints() : sheet.getDefaultRowHeightInPoints();
-        return height*PIXEL_DPI/POINT_DPI;
     }
 
     /**
@@ -283,6 +244,16 @@ public final class XSSFPicture extends XSSFShape implements Picture {
         }
     }
 
+    /**
+     * Return the dimension of the embedded image in pixel
+     *
+     * @return image dimension in pixels
+     */
+    public Dimension getImageDimension() {
+        XSSFPictureData picData = getPictureData();
+        return getImageDimension(picData.getPackagePart(), picData.getPictureType());
+    }
+    
     /**
      * Return picture data for this shape
      *
@@ -297,4 +268,20 @@ public final class XSSFPicture extends XSSFShape implements Picture {
         return ctPicture.getSpPr();
     }
 
+    /**
+     * @return the anchor that is used by this shape.
+     */
+    @Override
+    public XSSFClientAnchor getClientAnchor() {
+        XSSFAnchor a = getAnchor();
+        return (a instanceof XSSFClientAnchor) ? (XSSFClientAnchor)a : null;
+    }
+
+    /**
+     * @return the sheet which contains the picture shape
+     */
+    @Override
+    public XSSFSheet getSheet() {
+        return (XSSFSheet)getDrawing().getParent();
+    }
 }

src/ooxml/java/org/apache/poi/xssf/usermodel/XSSFSheet.java

@@ -704,6 +704,22 @@ public class XSSFSheet extends POIXMLDocumentPart implements Sheet {
         return (int)(width*256);
     }
 
+    /**
+     * Get the actual column width in pixels
+     * 
+     * <p>
+     * Please note, that this method works correctly only for workbooks
+     * with the default font size (Calibri 11pt for .xlsx).
+     * </p>
+     */
+    @Override
+    public float getColumnWidthInPixels(int columnIndex) {
+        int styleIdx = getColumnHelper().getColDefaultStyle(columnIndex);
+        CellStyle cs = getWorkbook().getStylesSource().getStyleAt(styleIdx);
+        float widthIn256 = getColumnWidth(columnIndex);
+        return (float)(widthIn256/256.0*XSSFWorkbook.DEFAULT_CHARACTER_WIDTH);
+    }
+    
     /**
      * Get the default column width for the sheet (if the columns do not define their own width) in
      * characters.
@@ -730,6 +746,7 @@ public class XSSFSheet extends POIXMLDocumentPart implements Sheet {
         return (short)(getDefaultRowHeightInPoints() * 20);
     }
 
+
     /**
      * Get the default row height for the sheet measued in point size (if the rows do not define their own height).
      *

src/ooxml/testcases/org/apache/poi/xssf/usermodel/TestXSSFPicture.java

@@ -18,13 +18,25 @@
 package org.apache.poi.xssf.usermodel;
 
 import static org.junit.Assert.assertArrayEquals;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertTrue;
 
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
 import java.util.List;
 
+import org.apache.poi.hssf.usermodel.HSSFPatriarch;
+import org.apache.poi.hssf.usermodel.HSSFPicture;
+import org.apache.poi.hssf.usermodel.HSSFShape;
+import org.apache.poi.hssf.usermodel.HSSFWorkbook;
 import org.apache.poi.ss.usermodel.BaseTestPicture;
 import org.apache.poi.ss.usermodel.ClientAnchor;
 import org.apache.poi.xssf.XSSFITestDataProvider;
 import org.apache.poi.xssf.XSSFTestDataSamples;
+import org.junit.Ignore;
+import org.junit.Test;
 import org.openxmlformats.schemas.drawingml.x2006.spreadsheetDrawing.CTTwoCellAnchor;
 import org.openxmlformats.schemas.drawingml.x2006.spreadsheetDrawing.STEditAs;
 
@@ -37,12 +49,21 @@ public final class TestXSSFPicture extends BaseTestPicture {
         super(XSSFITestDataProvider.instance);
     }
 
-    public void testResize() {
+    @Test
-        baseTestResize(new XSSFClientAnchor(0, 0, 504825, 85725, (short)0, 0, (short)1, 8));
+    public void resize() throws Exception {
+        XSSFWorkbook wb = XSSFITestDataProvider.instance.openSampleWorkbook("resize_compare.xlsx");
+        XSSFDrawing dp = wb.getSheetAt(0).createDrawingPatriarch();
+        List<XSSFShape> pics = dp.getShapes();
+        XSSFPicture inpPic = (XSSFPicture)pics.get(0);
+        XSSFPicture cmpPic = (XSSFPicture)pics.get(0);
+        
+        baseTestResize(inpPic, cmpPic, 2.0, 2.0);
+        wb.close();
     }
 
 
-    public void testCreate(){
+    @Test
+    public void create() throws IOException {
         XSSFWorkbook wb = new XSSFWorkbook();
         XSSFSheet sheet = wb.createSheet();
         XSSFDrawing drawing = sheet.createDrawingPatriarch();
@@ -70,6 +91,8 @@ public final class TestXSSFPicture extends BaseTestPicture {
         CTTwoCellAnchor ctShapeHolder = drawing.getCTDrawing().getTwoCellAnchorArray(0);
         // STEditAs.ABSOLUTE corresponds to ClientAnchor.DONT_MOVE_AND_RESIZE
         assertEquals(STEditAs.ABSOLUTE, ctShapeHolder.getEditAs());
+        
+        wb.close();
     }
 
     /**
@@ -77,7 +100,8 @@ public final class TestXSSFPicture extends BaseTestPicture {
      *
      * See Bugzilla 50458
      */
-    public void testShapeId(){
+    @Test
+    public void incrementShapeId() throws IOException {
         XSSFWorkbook wb = new XSSFWorkbook();
         XSSFSheet sheet = wb.createSheet();
         XSSFDrawing drawing = sheet.createDrawingPatriarch();
@@ -93,12 +117,15 @@ public final class TestXSSFPicture extends BaseTestPicture {
         jpegIdx = wb.addPicture(jpegData, XSSFWorkbook.PICTURE_TYPE_JPEG);
         XSSFPicture shape2 = drawing.createPicture(anchor, jpegIdx);
         assertEquals(2, shape2.getCTPicture().getNvPicPr().getCNvPr().getId());
+        wb.close();
     }
 
     /**
      * same image refrerred by mulitple sheets
      */
-    public void testMultiRelationShips(){
+    @SuppressWarnings("resource")
+    @Test
+    public void multiRelationShips() throws IOException {
         XSSFWorkbook wb = new XSSFWorkbook();
 
         byte[] pic1Data = "test jpeg data".getBytes();
@@ -140,6 +167,7 @@ public final class TestXSSFPicture extends BaseTestPicture {
         XSSFPicture shape44 = (XSSFPicture)drawing2.getShapes().get(1);
         assertArrayEquals(shape4.getPictureData().getData(), shape44.getPictureData().getData());
 
+        wb.close();
     }
 
 }

src/testcases/org/apache/poi/hssf/usermodel/TestHSSFPicture.java

@@ -18,7 +18,10 @@
 package org.apache.poi.hssf.usermodel;
 
 import static org.junit.Assert.assertArrayEquals;
+import static org.junit.Assert.assertEquals;
 
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
 import java.io.IOException;
 import java.util.List;
 
@@ -32,6 +35,8 @@ import org.apache.poi.ss.usermodel.ClientAnchor;
 import org.apache.poi.ss.usermodel.CreationHelper;
 import org.apache.poi.ss.usermodel.PictureData;
 import org.apache.poi.ss.usermodel.Workbook;
+import org.junit.Test;
+import org.junit.Ignore;
 
 /**
  * Test <code>HSSFPicture</code>.
@@ -44,14 +49,23 @@ public final class TestHSSFPicture extends BaseTestPicture {
         super(HSSFITestDataProvider.instance);
     }
 
-    public void testResize() {
+    @Test
-        baseTestResize(new HSSFClientAnchor(0, 0, 848, 240, (short)0, 0, (short)1, 9));
+    public void resize() throws Exception {
+        HSSFWorkbook wb = HSSFTestDataSamples.openSampleWorkbook("resize_compare.xls");
+        HSSFPatriarch dp = wb.getSheetAt(0).createDrawingPatriarch();
+        List<HSSFShape> pics = dp.getChildren();
+        HSSFPicture inpPic = (HSSFPicture)pics.get(0);
+        HSSFPicture cmpPic = (HSSFPicture)pics.get(1);
+        
+        baseTestResize(inpPic, cmpPic, 2.0, 2.0);
+        wb.close();
     }
     
     /**
      * Bug # 45829 reported ArithmeticException (/ by zero) when resizing png with zero DPI.
      */
-    public void test45829() {
+    @Test
+    public void bug45829() throws IOException {
         HSSFWorkbook wb = new HSSFWorkbook();
         HSSFSheet sh1 = wb.createSheet();
         HSSFPatriarch p1 = sh1.createDrawingPatriarch();
@@ -60,10 +74,14 @@ public final class TestHSSFPicture extends BaseTestPicture {
         int idx1 = wb.addPicture( pictureData, HSSFWorkbook.PICTURE_TYPE_PNG );
         HSSFPicture pic = p1.createPicture(new HSSFClientAnchor(), idx1);
         pic.resize();
+        
+        wb.close();
     }
 
 
-    public void testAddPictures(){
+    @SuppressWarnings("resource")
+    @Test
+    public void addPictures() throws IOException {
         HSSFWorkbook wb = new HSSFWorkbook();
         
         HSSFSheet sh = wb.createSheet("Pictures");
@@ -154,9 +172,13 @@ public final class TestHSSFPicture extends BaseTestPicture {
         assertArrayEquals(data2, ((HSSFPicture)dr.getChildren().get(1)).getPictureData().getData());
         assertArrayEquals(data3, ((HSSFPicture)dr.getChildren().get(2)).getPictureData().getData());
         assertArrayEquals(data4, ((HSSFPicture)dr.getChildren().get(3)).getPictureData().getData());
+        
+        wb.close();
     }
 
-    public void testBSEPictureRef(){
+    @SuppressWarnings("unused")
+    @Test
+    public void bsePictureRef() throws IOException {
         HSSFWorkbook wb = new HSSFWorkbook();
 
         HSSFSheet sh = wb.createSheet("Pictures");
@@ -180,9 +202,12 @@ public final class TestHSSFPicture extends BaseTestPicture {
         HSSFShapeGroup gr = dr.createGroup(new HSSFClientAnchor());
         gr.createPicture(new HSSFChildAnchor(), idx1);
         assertEquals(bse.getRef(), 3);
+        
+        wb.close();
     }
 
-    public void testReadExistingImage(){
+    @Test
+    public void readExistingImage(){
         HSSFWorkbook wb = HSSFTestDataSamples.openSampleWorkbook("drawings.xls");
         HSSFSheet sheet = wb.getSheet("picture");
         HSSFPatriarch drawing = sheet.getDrawingPatriarch();
@@ -192,7 +217,9 @@ public final class TestHSSFPicture extends BaseTestPicture {
         assertEquals(picture.getFileName(), "test");
     }
 
-    public void testSetGetProperties(){
+    @SuppressWarnings("resource")
+    @Test
+    public void setGetProperties() throws IOException {
         HSSFWorkbook wb = new HSSFWorkbook();
 
         HSSFSheet sh = wb.createSheet("Pictures");
@@ -214,9 +241,12 @@ public final class TestHSSFPicture extends BaseTestPicture {
 
         p1 = (HSSFPicture) dr.getChildren().get(0);
         assertEquals(p1.getFileName(), "aaa");
+        wb.close();
     }
 
-    public void test49658() throws IOException {
+    @SuppressWarnings("resource")
+    @Test
+    public void bug49658() throws IOException {
     	// test if inserted EscherMetafileBlip will be read again
         HSSFWorkbook wb = new HSSFWorkbook();
 
@@ -262,6 +292,7 @@ public final class TestHSSFPicture extends BaseTestPicture {
         pictureDataOut = wb.getAllPictures().get(2).getData();
         assertArrayEquals(wmfNoHeader, pictureDataOut);
 
+        wb.close();
     }
 
 }

src/testcases/org/apache/poi/ss/usermodel/BaseTestPicture.java

@@ -17,14 +17,19 @@
 
 package org.apache.poi.ss.usermodel;
 
-import junit.framework.TestCase;
+import static org.junit.Assert.assertEquals;
+
+import java.awt.Dimension;
+import java.io.FileOutputStream;
 
 import org.apache.poi.ss.ITestDataProvider;
+import org.apache.poi.ss.util.ImageUtils;
+import org.apache.poi.util.Units;
 
 /**
  * @author Yegor Kozlov
  */
-public abstract class BaseTestPicture extends TestCase {
+public abstract class BaseTestPicture {
 
     private final ITestDataProvider _testDataProvider;
 
@@ -32,26 +37,32 @@ public abstract class BaseTestPicture extends TestCase {
         _testDataProvider = testDataProvider;
     }
 
-    public void baseTestResize(ClientAnchor referenceAnchor) {
+    public void baseTestResize(Picture input, Picture compare, double scaleX, double scaleY) {
-        Workbook wb = _testDataProvider.createWorkbook();
+        input.resize(scaleX, scaleY);
-        Sheet sh1 = wb.createSheet();
-        Drawing  p1 = sh1.createDrawingPatriarch();
-        CreationHelper factory = wb.getCreationHelper();
         
-        byte[] pictureData = _testDataProvider.getTestDataFileContent("logoKarmokar4.png");
+        ClientAnchor inpCA = input.getClientAnchor();
-        int idx1 = wb.addPicture( pictureData, Workbook.PICTURE_TYPE_PNG );
+        ClientAnchor cmpCA = compare.getClientAnchor();
-        Picture picture = p1.createPicture(factory.createClientAnchor(), idx1);
-        picture.resize();
-        ClientAnchor anchor1 = picture.getPreferredSize();
         
-        //assert against what would BiffViewer print if we insert the image in xls and dump the file
+        Dimension inpDim = ImageUtils.getDimensionFromAnchor(input);
-        assertEquals(referenceAnchor.getCol1(), anchor1.getCol1());
+        Dimension cmpDim = ImageUtils.getDimensionFromAnchor(compare);
-        assertEquals(referenceAnchor.getRow1(), anchor1.getRow1());
+
-        assertEquals(referenceAnchor.getCol2(), anchor1.getCol2());
+        double emuPX = Units.EMU_PER_PIXEL;
-        assertEquals(referenceAnchor.getRow2(), anchor1.getRow2());
+        
-        assertEquals(referenceAnchor.getDx1(), anchor1.getDx1());
+        assertEquals("the image height differs", inpDim.getHeight(), cmpDim.getHeight(), emuPX*6);
-        assertEquals(referenceAnchor.getDy1(), anchor1.getDy1());
+        assertEquals("the image width differs", inpDim.getWidth(),  cmpDim.getWidth(),  emuPX*6);
-        assertEquals(referenceAnchor.getDx2(), anchor1.getDx2());
+        assertEquals("the starting column differs", inpCA.getCol1(), cmpCA.getCol1());
-        assertEquals(referenceAnchor.getDy2(), anchor1.getDy2());
+        assertEquals("the column x-offset differs", inpCA.getDx1(), cmpCA.getDx1(), 1);
+        assertEquals("the column y-offset differs", inpCA.getDy1(), cmpCA.getDy1(), 1);
+        assertEquals("the ending columns differs", inpCA.getCol2(), cmpCA.getCol2());
+        // can't compare row heights because of variable test heights
+        
+        input.resize();
+        inpDim = ImageUtils.getDimensionFromAnchor(input);
+        
+        Dimension imgDim = input.getImageDimension();
+
+        assertEquals("the image height differs", imgDim.getHeight(), inpDim.getHeight()/emuPX, 1);
+        assertEquals("the image width differs",  imgDim.getWidth(), inpDim.getWidth()/emuPX,  1);
     }
+
 }