--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/OrthancStone/Sources/Scene2D/Internals/OpenGLLookupTableTextureRenderer.cpp	Tue Jul 07 16:21:02 2020 +0200
@@ -0,0 +1,89 @@
+/**
+ * Stone of Orthanc
+ * 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 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 "OpenGLLookupTableTextureRenderer.h"
+
+#include "../../Toolbox/ImageToolbox.h"
+
+
+#include <OrthancException.h>
+
+namespace OrthancStone
+{
+  namespace Internals
+  {
+    void OpenGLLookupTableTextureRenderer::LoadTexture(
+      const LookupTableTextureSceneLayer& layer)
+    {
+      if (!context_.IsContextLost())
+      {
+        const Orthanc::ImageAccessor& source = layer.GetTexture();
+        const unsigned int width = source.GetWidth();
+        const unsigned int height = source.GetHeight();
+
+        if (texture_.get() == NULL ||
+            texture_->GetWidth() != width ||
+            texture_->GetHeight() != height)
+        {
+          texture_.reset(new Orthanc::Image(Orthanc::PixelFormat_RGBA32, width, height, false));
+        }
+
+        layer.Render(*texture_);
+
+        context_.MakeCurrent();
+        glTexture_.reset(new OpenGL::OpenGLTexture(context_));
+        glTexture_->Load(*texture_, layer.IsLinearInterpolation());
+        layerTransform_ = layer.GetTransform();
+      }
+    }
+
+    OpenGLLookupTableTextureRenderer::OpenGLLookupTableTextureRenderer(
+      OpenGL::IOpenGLContext&                 context,
+      OpenGLColorTextureProgram&              program,
+      const LookupTableTextureSceneLayer&     layer)
+      : context_(context)
+      , program_(program)
+    {
+      LoadTexture(layer);
+    }
+
+    
+    void OpenGLLookupTableTextureRenderer::Render(const AffineTransform2D& transform,
+                                                  unsigned int canvasWidth,
+                                                  unsigned int canvasHeight)
+    {
+      if (!context_.IsContextLost() && glTexture_.get() != NULL)
+      {
+        program_.Apply(
+          *glTexture_, 
+          AffineTransform2D::Combine(transform, layerTransform_), 
+          true);
+      }
+    }
+
+    
+    void OpenGLLookupTableTextureRenderer::Update(const ISceneLayer& layer)
+    {
+      // Should never happen (no revisions in color textures)
+      LoadTexture(dynamic_cast<const LookupTableTextureSceneLayer&>(layer));
+    }
+  }
+}