Bugzilla #40062:

Fixed handling for CCITT Group 4 images with fill order 2.
Submitted by: Gilles Beaugeais <gbeaugeais.at.voila.fr>

JM: Patch slightly modified/streamlined.

git-svn-id: https://svn.apache.org/repos/asf/xmlgraphics/fop/trunk@424979 13f79535-47bb-0310-9956-ffa450edef68

1 files changed, 52 insertions, 1 deletions

diff --git a/src/java/org/apache/fop/image/TIFFImage.java b/src/java/org/apache/fop/image/TIFFImage.java
index 23337d01e..a1a39df30 100644
--- a/src/java/org/apache/fop/image/TIFFImage.java
+++ b/src/java/org/apache/fop/image/TIFFImage.java
@@ -37,7 +37,8 @@ public class TIFFImage extends XmlGraphicsCommonsImage {
     private int stripCount = 0;
     private long stripOffset = 0;
     private long stripLength = 0;
-    
+    private int fillOrder = 1;
+
     /**
      * Constructs a new BatikImage instance.
      * @param imgReader basic metadata for the image
@@ -106,6 +107,12 @@ public class TIFFImage extends XmlGraphicsCommonsImage {
             stripCount = (int)(dir.getFieldAsLong(TIFFImageDecoder.TIFF_IMAGE_LENGTH)
                                 / fld.getAsLong(0));
         }
+
+        fld = dir.getField(TIFFImageDecoder.TIFF_FILL_ORDER);
+        if (fld != null) {
+            fillOrder = fld.getAsInt(0);
+        }
+
         stripOffset = dir.getField(TIFFImageDecoder.TIFF_STRIP_OFFSETS).getAsLong(0);
         stripLength = dir.getField(TIFFImageDecoder.TIFF_STRIP_BYTE_COUNTS).getAsLong(0);
         
@@ -136,7 +143,14 @@ public class TIFFImage extends XmlGraphicsCommonsImage {
                     return false;
                 }
 
+                // need to invert bytes if fill order = 2
+                if (fillOrder == 2) {
+                    for (int i = 0; i < (int)stripLength; i++) {
+                        readBuf[i] = flipTable[readBuf[i] & 0xff];
+                    }
+                }
                 this.raw = readBuf;
+
                 return true;
             } catch (IOException ioe) {
                 log.error("Error while loading image strip 1 (TIFF): ", ioe);
@@ -152,4 +166,41 @@ public class TIFFImage extends XmlGraphicsCommonsImage {
         return false;
     }
 
+    // Table to be used when fillOrder = 2, for flipping bytes.
+    // Copied from XML Graphics Commons' TIFFFaxDecoder class
+    private static byte[] flipTable = {
+     0,  -128,    64,   -64,    32,   -96,    96,   -32,
+    16,  -112,    80,   -48,    48,   -80,   112,   -16,
+     8,  -120,    72,   -56,    40,   -88,   104,   -24,
+    24,  -104,    88,   -40,    56,   -72,   120,    -8,
+     4,  -124,    68,   -60,    36,   -92,   100,   -28,
+    20,  -108,    84,   -44,    52,   -76,   116,   -12,
+    12,  -116,    76,   -52,    44,   -84,   108,   -20,
+    28,  -100,    92,   -36,    60,   -68,   124,    -4,
+     2,  -126,    66,   -62,    34,   -94,    98,   -30,
+    18,  -110,    82,   -46,    50,   -78,   114,   -14,
+    10,  -118,    74,   -54,    42,   -86,   106,   -22,
+    26,  -102,    90,   -38,    58,   -70,   122,    -6,
+     6,  -122,    70,   -58,    38,   -90,   102,   -26,
+    22,  -106,    86,   -42,    54,   -74,   118,   -10,
+    14,  -114,    78,   -50,    46,   -82,   110,   -18,
+    30,   -98,    94,   -34,    62,   -66,   126,    -2,
+     1,  -127,    65,   -63,    33,   -95,    97,   -31,
+    17,  -111,    81,   -47,    49,   -79,   113,   -15,
+     9,  -119,    73,   -55,    41,   -87,   105,   -23,
+    25,  -103,    89,   -39,    57,   -71,   121,    -7,
+     5,  -123,    69,   -59,    37,   -91,   101,   -27,
+    21,  -107,    85,   -43,    53,   -75,   117,   -11,
+    13,  -115,    77,   -51,    45,   -83,   109,   -19,
+    29,   -99,    93,   -35,    61,   -67,   125,    -3,
+     3,  -125,    67,   -61,    35,   -93,    99,   -29,
+    19,  -109,    83,   -45,    51,   -77,   115,   -13,
+    11,  -117,    75,   -53,    43,   -85,   107,   -21,
+    27,  -101,    91,   -37,    59,   -69,   123,    -5,
+     7,  -121,    71,   -57,    39,   -89,   103,   -25,
+    23,  -105,    87,   -41,    55,   -73,   119,    -9,
+    15,  -113,    79,   -49,    47,   -81,   111,   -17,
+    31,   -97,    95,   -33,    63,   -65,   127,    -1,
+    };
+    // end
 }