X-Git-Url: https://git.creatis.insa-lyon.fr/pubgit/?a=blobdiff_plain;f=src%2FgdcmRLEFramesInfo.cxx;h=4dcd5656abe9ce2d634fd71cf487fe7a5734fef7;hb=05a2e90d6b94f10838d426cb876436fd347b8b3d;hp=d95e93a521919b540417f2587b277217f3d1531d;hpb=d1c68c2c2ae9fadf927053150f7fbc625a7c7366;p=gdcm.git

diff --git a/src/gdcmRLEFramesInfo.cxx b/src/gdcmRLEFramesInfo.cxx
index d95e93a5..4dcd5656 100644
--- a/src/gdcmRLEFramesInfo.cxx
+++ b/src/gdcmRLEFramesInfo.cxx
@@ -3,8 +3,8 @@
   Program:   gdcm
   Module:    $RCSfile: gdcmRLEFramesInfo.cxx,v $
   Language:  C++
-  Date:      $Date: 2005/02/01 10:29:56 $
-  Version:   $Revision: 1.11 $
+  Date:      $Date: 2005/09/07 08:49:58 $
+  Version:   $Revision: 1.17 $
                                                                                 
   Copyright (c) CREATIS (Centre de Recherche et d'Applications en Traitement de
   l'Image). All rights reserved. See Doc/License.txt or
@@ -18,6 +18,7 @@
 
 #include "gdcmRLEFramesInfo.h"
 #include "gdcmDebug.h"
+#include "gdcmUtil.h"
 
 namespace gdcm 
 {
@@ -61,10 +62,17 @@ RLEFrame *RLEFramesInfo::GetNextFrame()
  * \brief     Reads from disk the Pixel Data of 'Run Length Encoded'
  *            Dicom encapsulated file and decompress it.
  * @param     fp already open File Pointer
- *            at which the pixel data should be copied
+ *            from which the pixel data should be read
+ * @param raw raw
+ * @param xSize x Size
+ * @param ySize y Size
+ * @param zSize z Size
+ * @param bitsAllocated Bits allocated
  * @return    Boolean
  */
-bool RLEFramesInfo::DecompressRLEFile( std::ifstream *fp , uint8_t *raw, int xSize, int ySize, int zSize, int bitsAllocated )
+bool RLEFramesInfo::DecompressRLEFile( std::ifstream *fp , uint8_t *raw, 
+                                       int xSize, int ySize, int zSize, 
+                                       int bitsAllocated )
 {
    uint8_t *subRaw = raw;
    long rawSegmentSize = xSize * ySize;
@@ -85,31 +93,47 @@ bool RLEFramesInfo::DecompressRLEFile( std::ifstream *fp , uint8_t *raw, int xSi
 }
 
 /**
- * \brief     Try to deal with RLE 16 Bits. 
- *            We assume the RLE has already been parsed and loaded in
- *            Raw (through \ref ReadAndDecompressJPEGFile ).
- *            We here need to make 16 Bits Pixels from Low Byte and
- *            High Byte 'Planes'...(for what it may mean)
- * @return    Boolean
+ * \brief  We assume Raw contains the decoded RLE pixels but as
+ *         8 bits per pixel. We convert those pixels to 16 bits
+ *         per pixel.
+ * @param raw raw 
+ * @param xSize x Size
+ * @param ySize y Size
+ * @param numberOfFrames number of frames 
+ * @return    Boolean always true
  */
-bool RLEFramesInfo::ConvertRLE16BitsFromRLE8Bits( uint8_t* raw, int xSize, 
-                                             int ySize,int numberOfFrames  )
+bool RLEFramesInfo::ConvertRLE16BitsFromRLE8Bits(uint8_t *raw, int xSize, 
+                                                 int ySize, int numberOfFrames)
 {
    size_t pixelNumber = xSize * ySize;
-   size_t rawSize = xSize * ySize * numberOfFrames;
+   size_t rawSize     = pixelNumber * numberOfFrames * 2;
 
    // We assumed Raw contains the decoded RLE pixels but as
    // 8 bits per pixel. In order to convert those pixels to 16 bits
    // per pixel we cannot work in place within Raw and hence
    // we copy it in a safe place, say copyRaw.
 
-   uint8_t* copyRaw = new uint8_t[rawSize * 2];
-   memmove( copyRaw, raw, rawSize * 2 );
+   uint8_t *copyRaw = new uint8_t[rawSize];
+   memmove( copyRaw, raw, rawSize );
+
+   uint8_t *x = raw;
+   uint8_t *a;
+   uint8_t *b;
+
+   // Warning : unckecked patch to see the behaviour on Big Endian Processors
 
-   uint8_t* x = raw;
-   uint8_t* a = copyRaw;
-   uint8_t* b = a + pixelNumber;
+   if ( !Util::IsCurrentProcessorBigEndian() )
+   { 
+      a = copyRaw;         // beginning of 'low bytes'
+      b = a + pixelNumber; // beginning of 'hight bytes'
+   }
+   else
+   {
+      b = copyRaw;         // beginning of 'low bytes'
+      a = b + pixelNumber; // beginning of 'hight bytes'
+   } 
 
+   // Re order bytes
    for ( int i = 0; i < numberOfFrames; i++ )
    {
       for ( unsigned int j = 0; j < pixelNumber; j++ )
@@ -120,8 +144,7 @@ bool RLEFramesInfo::ConvertRLE16BitsFromRLE8Bits( uint8_t* raw, int xSize,
    }
 
    delete[] copyRaw;
-      
-   /// \todo check that operator new []didn't fail, and sometimes return false
+
    return true;
 }