--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/OrthancFramework/Sources/Images/PixelTraits.h	Wed Jun 10 20:30:34 2020 +0200
@@ -0,0 +1,412 @@
+/**
+ * Orthanc - A Lightweight, RESTful DICOM Store
+ * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
+ * Department, University Hospital of Liege, Belgium
+ * Copyright (C) 2017-2020 Osimis S.A., Belgium
+ *
+ * This program is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * In addition, as a special exception, the copyright holders of this
+ * program give permission to link the code of its release with the
+ * OpenSSL project's "OpenSSL" library (or with modified versions of it
+ * that use the same license as the "OpenSSL" library), and distribute
+ * the linked executables. You must obey the GNU General Public License
+ * in all respects for all of the code used other than "OpenSSL". If you
+ * modify file(s) with this exception, you may extend this exception to
+ * your version of the file(s), but you are not obligated to do so. If
+ * you do not wish to do so, delete this exception statement from your
+ * version. If you delete this exception statement from all source files
+ * in the program, then also delete it here.
+ * 
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ **/
+
+
+#pragma once
+
+#include "../Enumerations.h"
+
+#include <limits>
+
+namespace Orthanc
+{
+  template <PixelFormat format,
+            typename _PixelType>
+  struct IntegerPixelTraits
+  {
+    typedef _PixelType  PixelType;
+
+    ORTHANC_FORCE_INLINE
+    static PixelFormat GetPixelFormat()
+    {
+      return format;
+    }
+
+    ORTHANC_FORCE_INLINE
+    static PixelType IntegerToPixel(int64_t value)
+    {
+      if (value < static_cast<int64_t>(std::numeric_limits<PixelType>::min()))
+      {
+        return std::numeric_limits<PixelType>::min();
+      }
+      else if (value > static_cast<int64_t>(std::numeric_limits<PixelType>::max()))
+      {
+        return std::numeric_limits<PixelType>::max();        
+      }
+      else
+      {
+        return static_cast<PixelType>(value);
+      }
+    }
+
+    ORTHANC_FORCE_INLINE
+    static void SetZero(PixelType& target)
+    {
+      target = 0;
+    }
+
+    ORTHANC_FORCE_INLINE
+    static void SetMinValue(PixelType& target)
+    {
+      target = std::numeric_limits<PixelType>::min();
+    }
+
+    ORTHANC_FORCE_INLINE
+    static void SetMaxValue(PixelType& target)
+    {
+      target = std::numeric_limits<PixelType>::max();
+    }
+
+    ORTHANC_FORCE_INLINE
+    static void Copy(PixelType& target,
+                     const PixelType& source)
+    {
+      target = source;
+    }
+
+    ORTHANC_FORCE_INLINE
+    static float PixelToFloat(const PixelType& source)
+    {
+      return static_cast<float>(source);
+    }
+
+    ORTHANC_FORCE_INLINE
+    static void FloatToPixel(PixelType& target,
+                             float value)
+    {
+      value += 0.5f;
+      if (value < static_cast<float>(std::numeric_limits<PixelType>::min()))
+      {
+        target = std::numeric_limits<PixelType>::min();
+      }
+      else if (value > static_cast<float>(std::numeric_limits<PixelType>::max()))
+      {
+        target = std::numeric_limits<PixelType>::max();
+      }
+      else
+      {
+        target = static_cast<PixelType>(value);
+      }
+    }
+
+    ORTHANC_FORCE_INLINE
+    static bool IsEqual(const PixelType& a,
+                        const PixelType& b)
+    {
+      return a == b;
+    }
+  };
+
+
+  template <PixelFormat Format>
+  struct PixelTraits;
+
+
+  template <>
+  struct PixelTraits<PixelFormat_Grayscale8> :
+    public IntegerPixelTraits<PixelFormat_Grayscale8, uint8_t>
+  {
+  };
+
+  
+  template <>
+  struct PixelTraits<PixelFormat_Grayscale16> :
+    public IntegerPixelTraits<PixelFormat_Grayscale16, uint16_t>
+  {
+  };
+
+  
+  template <>
+  struct PixelTraits<PixelFormat_SignedGrayscale16> :
+    public IntegerPixelTraits<PixelFormat_SignedGrayscale16, int16_t>
+  {
+  };
+
+
+  template <>
+  struct PixelTraits<PixelFormat_Grayscale32> :
+    public IntegerPixelTraits<PixelFormat_Grayscale32, uint32_t>
+  {
+  };
+
+
+  template <>
+  struct PixelTraits<PixelFormat_Grayscale64> :
+    public IntegerPixelTraits<PixelFormat_Grayscale64, uint64_t>
+  {
+  };
+
+
+  template <>
+  struct PixelTraits<PixelFormat_RGB24>
+  {
+    struct PixelType
+    {
+      uint8_t  red_;
+      uint8_t  green_;
+      uint8_t  blue_;
+    };
+
+    ORTHANC_FORCE_INLINE
+    static PixelFormat GetPixelFormat()
+    {
+      return PixelFormat_RGB24;
+    }
+
+    ORTHANC_FORCE_INLINE
+    static void SetZero(PixelType& target)
+    {
+      target.red_ = 0;
+      target.green_ = 0;
+      target.blue_ = 0;
+    }
+
+    ORTHANC_FORCE_INLINE
+    static void Copy(PixelType& target,
+                     const PixelType& source)
+    {
+      target.red_ = source.red_;
+      target.green_ = source.green_;
+      target.blue_ = source.blue_;
+    }
+
+    ORTHANC_FORCE_INLINE
+    static bool IsEqual(const PixelType& a,
+                        const PixelType& b)
+    {
+      return (a.red_ == b.red_ &&
+              a.green_ == b.green_ &&
+              a.blue_ == b.blue_);
+    }
+
+    ORTHANC_FORCE_INLINE
+    static void FloatToPixel(PixelType& target,
+                             float value)
+    {
+      uint8_t v;
+      PixelTraits<PixelFormat_Grayscale8>::FloatToPixel(v, value);
+
+      target.red_ = v;
+      target.green_ = v;
+      target.blue_ = v;
+    }
+  };
+
+
+  template <>
+  struct PixelTraits<PixelFormat_BGRA32>
+  {
+    struct PixelType
+    {
+      uint8_t  blue_;
+      uint8_t  green_;
+      uint8_t  red_;
+      uint8_t  alpha_;
+    };
+
+    ORTHANC_FORCE_INLINE
+    static PixelFormat GetPixelFormat()
+    {
+      return PixelFormat_BGRA32;
+    }
+
+    ORTHANC_FORCE_INLINE
+    static void SetZero(PixelType& target)
+    {
+      target.blue_ = 0;
+      target.green_ = 0;
+      target.red_ = 0;
+      target.alpha_ = 0;
+    }
+
+    ORTHANC_FORCE_INLINE
+    static void Copy(PixelType& target,
+                     const PixelType& source)
+    {
+      target.blue_ = source.blue_;
+      target.green_ = source.green_;
+      target.red_ = source.red_;
+      target.alpha_ = source.alpha_;
+    }
+
+    ORTHANC_FORCE_INLINE
+    static bool IsEqual(const PixelType& a,
+                        const PixelType& b)
+    {
+      return (a.blue_ == b.blue_ &&
+              a.green_ == b.green_ &&
+              a.red_ == b.red_ &&
+              a.alpha_ == b.alpha_);
+    }
+
+    ORTHANC_FORCE_INLINE
+    static void FloatToPixel(PixelType& target,
+                             float value)
+    {
+      uint8_t v;
+      PixelTraits<PixelFormat_Grayscale8>::FloatToPixel(v, value);
+
+      target.blue_ = v;
+      target.green_ = v;
+      target.red_ = v;
+      target.alpha_ = 255;      
+    }
+  };
+
+
+  template <>
+  struct PixelTraits<PixelFormat_RGBA32>
+  {
+    struct PixelType
+    {
+      uint8_t  red_;
+      uint8_t  green_;
+      uint8_t  blue_;
+      uint8_t  alpha_;
+    };
+
+    ORTHANC_FORCE_INLINE
+    static PixelFormat GetPixelFormat()
+    {
+      return PixelFormat_RGBA32;
+    }
+
+    ORTHANC_FORCE_INLINE
+    static void SetZero(PixelType& target)
+    {
+      target.red_ = 0;
+      target.green_ = 0;
+      target.blue_ = 0;
+      target.alpha_ = 0;
+    }
+
+    ORTHANC_FORCE_INLINE
+    static void Copy(PixelType& target,
+                     const PixelType& source)
+    {
+      target.red_ = source.red_;
+      target.green_ = source.green_;
+      target.blue_ = source.blue_;
+      target.alpha_ = source.alpha_;
+    }
+
+    ORTHANC_FORCE_INLINE
+    static bool IsEqual(const PixelType& a,
+                        const PixelType& b)
+    {
+      return (a.red_ == b.red_ &&
+              a.green_ == b.green_ &&
+              a.blue_ == b.blue_ &&
+              a.alpha_ == b.alpha_);
+    }
+
+    ORTHANC_FORCE_INLINE
+    static void FloatToPixel(PixelType& target,
+                             float value)
+    {
+      uint8_t v;
+      PixelTraits<PixelFormat_Grayscale8>::FloatToPixel(v, value);
+
+      target.red_ = v;
+      target.green_ = v;
+      target.blue_ = v;
+      target.alpha_ = 255;      
+    }
+  };
+
+
+  template <>
+  struct PixelTraits<PixelFormat_Float32>
+  {
+    typedef float  PixelType;
+
+    ORTHANC_FORCE_INLINE
+    static PixelFormat GetPixelFormat()
+    {
+      return PixelFormat_Float32;
+    }
+
+    ORTHANC_FORCE_INLINE
+    static void SetZero(PixelType& target)
+    {
+      target = 0.0f;
+    }
+
+    ORTHANC_FORCE_INLINE
+    static void Copy(PixelType& target,
+                     const PixelType& source)
+    {
+      target = source;
+    }
+
+    ORTHANC_FORCE_INLINE
+    static bool IsEqual(const PixelType& a,
+                        const PixelType& b)
+    {
+      float tmp = (a - b);
+
+      if (tmp < 0)
+      {
+        tmp = -tmp;
+      }
+
+      return tmp <= std::numeric_limits<float>::epsilon();
+    }
+    
+    ORTHANC_FORCE_INLINE
+    static void SetMinValue(PixelType& target)
+    {
+      // std::numeric_limits<float>::lowest is not supported on
+      // all compilers (for instance, Visual Studio 9.0 2008)
+      target = -std::numeric_limits<float>::max();
+    }
+
+    ORTHANC_FORCE_INLINE
+    static void SetMaxValue(PixelType& target)
+    {
+      target = std::numeric_limits<float>::max();
+    }
+
+    ORTHANC_FORCE_INLINE
+    static void FloatToPixel(PixelType& target,
+                             float value)
+    {
+      target = value;
+    }
+
+    ORTHANC_FORCE_INLINE
+    static float PixelToFloat(const PixelType& source)
+    {
+      return source;
+    }
+  };
+}