Bugzilla 51335: Parse picture goal and crop sizes

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1134663 13f79535-47bb-0310-9956-ffa450edef68

src/documentation/content/xdocs/status.xml

@@ -34,6 +34,7 @@
 
     <changes>
         <release version="3.8-beta4" date="2011-??-??">
+           <action dev="poi-developers" type="add">51335 - Parse picture goal and crop sizes in HWPF</action>
            <action dev="poi-developers" type="add">51305 - Add sprmTCellPaddingDefault support in HWPF</action>
            <action dev="poi-developers" type="add">51265 - Enhanced Handling of Picture Parts in XWPF</action>
            <action dev="poi-developers" type="add">51292 - Additional HWPF Table Cell Descriptor values</action>

src/scratchpad/src/org/apache/poi/hwpf/usermodel/Picture.java

@@ -41,7 +41,14 @@ public final class Picture
   static final int PICT_HEADER_OFFSET = 0x4;
   static final int MFPMM_OFFSET = 0x6;
   static final int PICF_SHAPE_OFFSET = 0xE;
-  static final int PICMD_OFFSET = 0x1C;
+  static final int DXAGOAL_OFFSET = 0x1C;
+  static final int DYAGOAL_OFFSET = 0x1E;
+  static final int MX_OFFSET = 0x20;
+  static final int MY_OFFSET = 0x22;
+  static final int DXACROPLEFT_OFFSET = 0x24;
+  static final int DYACROPTOP_OFFSET = 0x26;
+  static final int DXACROPRIGHT_OFFSET = 0x28;
+  static final int DYACROPBOTTOM_OFFSET = 0x2A;
   static final int UNKNOWN_HEADER_SIZE = 0x49;
 
   public static final byte[] GIF = new byte[]{'G', 'I', 'F'};
@@ -74,6 +81,13 @@ public final class Picture
   private int height = -1;
   private int width = -1;
 
+  private int dxaGoal = -1;
+  private int dyaGoal = -1;
+
+  private int dxaCropLeft = -1;
+  private int dyaCropTop = -1;
+  private int dxaCropRight = -1;
+  private int dyaCropBottom = -1;
 
   public Picture(int dataBlockStartOfsset, byte[] _dataStream, boolean fillBytes)
   {
@@ -87,8 +101,16 @@ public final class Picture
 
     }
 
-    this.aspectRatioX = extractAspectRatioX(_dataStream, dataBlockStartOfsset);
-    this.aspectRatioY = extractAspectRatioY(_dataStream, dataBlockStartOfsset);
+    this.dxaGoal = LittleEndian.getShort(_dataStream, dataBlockStartOfsset+DXAGOAL_OFFSET);
+    this.dyaGoal = LittleEndian.getShort(_dataStream, dataBlockStartOfsset+DYAGOAL_OFFSET);
+
+    this.aspectRatioX = LittleEndian.getShort(_dataStream, dataBlockStartOfsset+MX_OFFSET)/10;
+    this.aspectRatioY = LittleEndian.getShort(_dataStream, dataBlockStartOfsset+MY_OFFSET)/10;
+
+    this.dxaCropLeft = LittleEndian.getShort(_dataStream, dataBlockStartOfsset+DXACROPLEFT_OFFSET);
+    this.dyaCropTop = LittleEndian.getShort(_dataStream, dataBlockStartOfsset+DYACROPTOP_OFFSET);
+    this.dxaCropRight = LittleEndian.getShort(_dataStream, dataBlockStartOfsset+DXACROPRIGHT_OFFSET);
+    this.dyaCropBottom = LittleEndian.getShort(_dataStream, dataBlockStartOfsset+DYACROPBOTTOM_OFFSET);
 
     if (fillBytes)
     {
@@ -116,16 +138,6 @@ public final class Picture
     }
   }
 
-  private static int extractAspectRatioX(byte[] _dataStream, int dataBlockStartOffset)
-  {
-    return LittleEndian.getShort(_dataStream, dataBlockStartOffset+0x20)/10;
-  }
-
-  private static int extractAspectRatioY(byte[] _dataStream, int dataBlockStartOffset)
-  {
-    return LittleEndian.getShort(_dataStream, dataBlockStartOffset+0x22)/10;
-  }
-
   /**
    * Tries to suggest a filename: hex representation of picture structure offset in "Data" stream plus extension that
    * is tried to determine from first byte of picture's content.
@@ -194,20 +206,65 @@ public final class Picture
   }
 
     /**
-   * returns horizontal aspect ratio for picture provided by user
+     * @return the horizontal aspect ratio for picture provided by user
      */
-  public int getAspectRatioX()
-  {
+    public int getAspectRatioX() {
         return aspectRatioX;
     }
+
     /**
-   * returns vertical aspect ratio for picture provided by user
+     * @retrn the vertical aspect ratio for picture provided by user
      */
-  public int getAspectRatioY()
-  {
+    public int getAspectRatioY() {
         return aspectRatioY;
     }
 
+    /**
+     * Gets the initial width of the picture, in twips, prior to cropping or scaling.
+     *
+     * @return the initial width of the picture in twips
+     */
+    public int getDxaGoal() {
+        return dxaGoal;
+    }
+
+    /**
+     * Gets the initial height of the picture, in twips, prior to cropping or scaling.
+     *
+     * @return the initial width of the picture in twips
+     */
+    public int getDyaGoal() {
+        return dyaGoal;
+    }
+
+    /**
+     * @return The amount the picture has been cropped on the left in twips
+     */
+    public int getDxaCropLeft() {
+        return dxaCropLeft;
+    }
+
+    /**
+     * @return The amount the picture has been cropped on the top in twips
+     */
+    public int getDyaCropTop() {
+        return dyaCropTop;
+    }
+
+    /**
+     * @return The amount the picture has been cropped on the right in twips
+     */
+    public int getDxaCropRight() {
+        return dxaCropRight;
+    }
+
+    /**
+     * @return The amount the picture has been cropped on the bottom in twips
+     */
+    public int getDyaCropBottom() {
+        return dyaCropBottom;
+    }
+
     /**
    * tries to suggest extension for picture's file by matching signatures of popular image formats to first bytes
    * of picture's contents

src/scratchpad/testcases/org/apache/poi/hwpf/usermodel/TestPictures.java

@@ -302,4 +302,34 @@ public final class TestPictures extends TestCase {
        assertEquals(4,  escher8s);
        assertEquals(0, plain8s);
     }
+
+    public void testCroppedPictures() {
+        HWPFDocument doc = HWPFTestDataSamples.openSampleFile("testCroppedPictures.doc");
+        List<Picture> pics = doc.getPicturesTable().getAllPictures();
+
+        assertNotNull(pics);
+        assertEquals(2, pics.size());
+
+        Picture pic1 = pics.get(0);
+        assertEquals(27, pic1.getAspectRatioX());
+        assertEquals(27, pic1.getAspectRatioY());
+        assertEquals(12000, pic1.getDxaGoal());       // 21.17 cm / 2.54 cm/inch * 72dpi * 20 = 12000
+        assertEquals(9000, pic1.getDyaGoal());        // 15.88 cm / 2.54 cm/inch * 72dpi * 20 = 9000
+        assertEquals(0, pic1.getDxaCropLeft());
+        assertEquals(0, pic1.getDxaCropRight());
+        assertEquals(0, pic1.getDyaCropTop());
+        assertEquals(0, pic1.getDyaCropBottom());
+
+        Picture pic2 = pics.get(1);
+        System.out.println(pic2.getWidth());
+        assertEquals(76, pic2.getAspectRatioX());
+        assertEquals(68, pic2.getAspectRatioY());
+        assertEquals(12000, pic2.getDxaGoal());       // 21.17 cm / 2.54 cm/inch * 72dpi * 20 = 12000
+        assertEquals(9000, pic2.getDyaGoal());        // 15.88 cm / 2.54 cm/inch * 72dpi * 20 = 9000
+        assertEquals(0, pic2.getDxaCropLeft());       // TODO YK: The Picture is cropped but HWPF reads the crop parameters all zeros
+        assertEquals(0, pic2.getDxaCropRight());
+        assertEquals(0, pic2.getDyaCropTop());
+        assertEquals(0, pic2.getDyaCropBottom());
+    }
+
 }