X-Git-Url: https://git.creatis.insa-lyon.fr/pubgit/?a=blobdiff_plain;f=src%2FgdcmPixelReadConvert.cxx;h=2970f1f01e73b5b3a57493f00659e6a54f808660;hb=5dc31f3b74c8da7f8c59caa4d2255d1d0e7a03d2;hp=78075ab2a940da5e70cb2ff968c48d7e95d2e5b9;hpb=95e43356511d138225d8f718f632b3e7a8fcc106;p=gdcm.git

diff --git a/src/gdcmPixelReadConvert.cxx b/src/gdcmPixelReadConvert.cxx
index 78075ab2..2970f1f0 100644
--- a/src/gdcmPixelReadConvert.cxx
+++ b/src/gdcmPixelReadConvert.cxx
@@ -3,8 +3,8 @@
   Program:   gdcm
   Module:    $RCSfile: gdcmPixelReadConvert.cxx,v $
   Language:  C++
-  Date:      $Date: 2005/02/05 01:37:09 $
-  Version:   $Revision: 1.49 $
+  Date:      $Date: 2005/03/31 09:46:51 $
+  Version:   $Revision: 1.54 $
                                                                                 
   Copyright (c) CREATIS (Centre de Recherche et d'Applications en Traitement de
   l'Image). All rights reserved. See Doc/License.txt or
@@ -123,13 +123,15 @@ void PixelReadConvert::GrabInformationsFromFile( File *file )
 
    PixelOffset     = file->GetPixelOffset();
    PixelDataLength = file->GetPixelAreaLength();
-   RLEInfo  = file->GetRLEInfo();
-   JPEGInfo = file->GetJPEGInfo();
+   RLEInfo         = file->GetRLEInfo();
+   JPEGInfo        = file->GetJPEGInfo();
+
+   IsMonochrome    = file->IsMonochrome();
+   IsMonochrome1   = file->IsMonochrome1();
+   IsPaletteColor  = file->IsPaletteColor();
+   IsYBRFull       = file->IsYBRFull();
 
    PlanarConfiguration = file->GetPlanarConfiguration();
-   IsMonochrome = file->IsMonochrome();
-   IsPaletteColor = file->IsPaletteColor();
-   IsYBRFull = file->IsYBRFull();
 
    /////////////////////////////////////////////////////////////////
    // LUT section:
@@ -262,6 +264,7 @@ bool PixelReadConvert::ReadAndDecompressPixelData( std::ifstream *fp )
    //// Third stage: twigle the bytes and bits.
    ConvertReorderEndianity();
    ConvertReArrangeBits();
+   ConvertFixGreyLevels();
    ConvertHandleColor();
 
    return true;
@@ -641,9 +644,78 @@ void PixelReadConvert::ConvertReorderEndianity()
    }
 }
 
+/**
+ * \brief Deal with Grey levels i.e. re-arange them
+ *        to have low values = dark, high values = bright
+ */
+void PixelReadConvert::ConvertFixGreyLevels()
+{
+   if (!IsMonochrome1)
+      return;
+
+   uint32_t i; // to please M$VC6
+   int16_t j;
+
+   if (!PixelSign)
+   {
+      if ( BitsAllocated == 8 )
+      {
+         uint8_t *deb = (uint8_t *)Raw;
+         for (i=0; i<RawSize; i++)      
+         {
+            *deb = 255 - *deb;
+            deb++;
+         }
+         return;
+      }
+
+      if ( BitsAllocated == 16 )
+      {
+         uint16_t mask =1;
+         for (j=0; j<BitsStored-1; j++)
+         {
+            mask = (mask << 1) +1; // will be fff when BitsStored=12
+         }
+
+         uint16_t *deb = (uint16_t *)Raw;
+         for (i=0; i<RawSize/2; i++)      
+         {
+            *deb = mask - *deb;
+            deb++;
+         }
+         return;
+       }
+   }
+   else
+   {
+      if ( BitsAllocated == 8 )
+      {
+         uint8_t smask8 = 255;
+         uint8_t *deb = (uint8_t *)Raw;
+         for (i=0; i<RawSize; i++)      
+         {
+            *deb = smask8 - *deb;
+            deb++;
+         }
+         return;
+      }
+      if ( BitsAllocated == 16 )
+      {
+         uint16_t smask16 = 65535;
+         uint16_t *deb = (uint16_t *)Raw;
+         for (i=0; i<RawSize/2; i++)      
+         {
+            *deb = smask16 - *deb;
+            deb++;
+         }
+         return;
+      }
+   }
+}
+
 /**
  * \brief  Re-arrange the bits within the bytes.
- * @return Boolean
+ * @return Boolean always true
  */
 bool PixelReadConvert::ConvertReArrangeBits() throw ( FormatError )
 {
@@ -724,10 +796,10 @@ void PixelReadConvert::ConvertYcBcRPlanesToRGBPixels()
    int l        = XSize * YSize;
    int nbFrames = ZSize;
 
-   uint8_t *a = copyRaw;
+   uint8_t *a = copyRaw + 0;
    uint8_t *b = copyRaw + l;
-   uint8_t *c = copyRaw + l + l;
-   double R, G, B;
+   uint8_t *c = copyRaw + l+ l;
+   int32_t R, G, B;
 
    /// \todo : Replace by the 'well known' integer computation
    ///         counterpart. Refer to
@@ -738,16 +810,20 @@ void PixelReadConvert::ConvertYcBcRPlanesToRGBPixels()
    {
       for ( int j = 0; j < l; j++ )
       {
-         R = 1.164 *(*a-16) + 1.596 *(*c -128) + 0.5;
-         G = 1.164 *(*a-16) - 0.813 *(*c -128) - 0.392 *(*b -128) + 0.5;
-         B = 1.164 *(*a-16) + 2.017 *(*b -128) + 0.5;
-
-         if (R < 0.0)   R = 0.0;
-         if (G < 0.0)   G = 0.0;
-         if (B < 0.0)   B = 0.0;
-         if (R > 255.0) R = 255.0;
-         if (G > 255.0) G = 255.0;
-         if (B > 255.0) B = 255.0;
+         R = 38142 *(*a-16) + 52298 *(*c -128);
+         G = 38142 *(*a-16) - 26640 *(*c -128) - 12845 *(*b -128);
+         B = 38142 *(*a-16) + 66093 *(*b -128);
+
+         R = (R+16384)>>15;
+         G = (G+16384)>>15;
+         B = (B+16384)>>15;
+
+         if (R < 0)   R = 0;
+         if (G < 0)   G = 0;
+         if (B < 0)   B = 0;
+         if (R > 255) R = 255;
+         if (G > 255) G = 255;
+         if (B > 255) B = 255;
 
          *(localRaw++) = (uint8_t)R;
          *(localRaw++) = (uint8_t)G;