--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Framework/Wrappers/CairoSurface.cpp	Tue May 28 17:44:53 2019 +0200
@@ -0,0 +1,155 @@
+/**
+ * Stone of Orthanc
+ * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
+ * Department, University Hospital of Liege, Belgium
+ * Copyright (C) 2017-2019 Osimis S.A., Belgium
+ *
+ * This program is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU Affero General Public License
+ * as published by the Free Software Foundation, either version 3 of
+ * the License, or (at your option) any later version.
+ *
+ * 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
+ * Affero General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ **/
+
+
+#include "CairoSurface.h"
+
+#include <Core/Logging.h>
+#include <Core/OrthancException.h>
+#include <Core/Images/ImageProcessing.h>
+
+namespace OrthancStone
+{
+  void CairoSurface::Release()
+  {
+    if (surface_)
+    {
+      cairo_surface_destroy(surface_);
+      surface_ = NULL;
+    }
+  }
+
+
+  void CairoSurface::Allocate(unsigned int width,
+                              unsigned int height,
+                              bool hasAlpha)
+  {
+    Release();
+
+    hasAlpha_ = hasAlpha;
+
+    surface_ = cairo_image_surface_create
+      (hasAlpha ? CAIRO_FORMAT_ARGB32 : CAIRO_FORMAT_RGB24, width, height);
+    if (!surface_)
+    {
+      // Should never occur
+      throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError);
+    }
+
+    if (cairo_surface_status(surface_) != CAIRO_STATUS_SUCCESS)
+    {
+      LOG(ERROR) << "Cannot create a Cairo surface";
+      cairo_surface_destroy(surface_);
+      throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError);
+    }
+
+    width_ = width;
+    height_ = height;
+    pitch_ = cairo_image_surface_get_stride(surface_);
+    buffer_ = cairo_image_surface_get_data(surface_);
+  }
+
+
+  CairoSurface::CairoSurface(Orthanc::ImageAccessor& accessor,
+                             bool hasAlpha) :
+    hasAlpha_(hasAlpha)
+  {
+    if (accessor.GetFormat() != Orthanc::PixelFormat_BGRA32)
+    {
+      throw Orthanc::OrthancException(Orthanc::ErrorCode_IncompatibleImageFormat);
+    }      
+
+    width_ = accessor.GetWidth();
+    height_ = accessor.GetHeight();
+    pitch_ = accessor.GetPitch();
+    buffer_ = accessor.GetBuffer();
+
+    surface_ = cairo_image_surface_create_for_data
+      (reinterpret_cast<unsigned char*>(buffer_),
+       hasAlpha_ ? CAIRO_FORMAT_ARGB32 : CAIRO_FORMAT_RGB24,
+       width_, height_, pitch_);
+    if (!surface_)
+    {
+      // Should never occur
+      throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError);
+    }
+
+    if (cairo_surface_status(surface_) != CAIRO_STATUS_SUCCESS)
+    {
+      LOG(ERROR) << "Bad pitch for a Cairo surface";
+      cairo_surface_destroy(surface_);
+      throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError);
+    }
+  }
+
+
+  void CairoSurface::SetSize(unsigned int width,
+                             unsigned int height,
+                             bool hasAlpha)
+  {
+    if (hasAlpha_ != hasAlpha ||
+        width_ != width ||
+        height_ != height)
+    {
+      Allocate(width, height, hasAlpha);
+    }
+  }
+
+
+  void CairoSurface::Copy(const CairoSurface& other)
+  {
+    SetSize(other.GetWidth(), other.GetHeight(), other.HasAlpha());
+    
+    Orthanc::ImageAccessor source, target;
+
+    other.GetReadOnlyAccessor(source);
+    GetWriteableAccessor(target);
+
+    Orthanc::ImageProcessing::Copy(target, source);
+
+    cairo_surface_mark_dirty(surface_);
+  }
+
+
+  void CairoSurface::Copy(const Orthanc::ImageAccessor& source,
+                          bool hasAlpha)
+  {
+    SetSize(source.GetWidth(), source.GetHeight(), hasAlpha);
+
+    Orthanc::ImageAccessor target;
+    GetWriteableAccessor(target);
+
+    Orthanc::ImageProcessing::Convert(target, source);
+
+    cairo_surface_mark_dirty(surface_);
+  }
+
+
+  void CairoSurface::GetReadOnlyAccessor(Orthanc::ImageAccessor& target) const
+  {
+    target.AssignReadOnly(Orthanc::PixelFormat_BGRA32, width_, height_, pitch_, buffer_);
+  }
+  
+
+  void CairoSurface::GetWriteableAccessor(Orthanc::ImageAccessor& target)
+  {
+    target.AssignWritable(Orthanc::PixelFormat_BGRA32, width_, height_, pitch_, buffer_);
+  }
+}