--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/OrthancStone/Sources/Scene2D/CairoCompositor.h	Tue Jul 07 16:21:02 2020 +0200
@@ -0,0 +1,101 @@
+/**
+ * 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/>.
+ **/
+
+
+#pragma once
+
+#include "ICompositor.h"
+#include "../Fonts/GlyphBitmapAlphabet.h"
+#include "../Wrappers/CairoContext.h"
+#include "Internals/CompositorHelper.h"
+#include "Internals/ICairoContextProvider.h"
+
+namespace OrthancStone
+{
+  class CairoCompositor :
+      public ICompositor,
+      private Internals::CompositorHelper::IRendererFactory,
+      private Internals::ICairoContextProvider
+  {
+  private:
+    typedef std::map<size_t, GlyphBitmapAlphabet*>   Fonts;
+
+    std::unique_ptr<Internals::CompositorHelper>  helper_;
+    CairoSurface                 canvas_;
+    Fonts                        fonts_;
+
+    // Only valid during a call to "Refresh()"
+    std::unique_ptr<CairoContext>  context_;
+
+    virtual cairo_t* GetCairoContext() ORTHANC_OVERRIDE;
+
+    virtual Internals::CompositorHelper::ILayerRenderer* Create(const ISceneLayer& layer) ORTHANC_OVERRIDE;
+
+  public:
+    CairoCompositor(unsigned int canvasWidth,
+                    unsigned int canvasHeight);
+    
+    virtual ~CairoCompositor();
+
+    const CairoSurface& GetCanvas() const
+    {
+      return canvas_;
+    }
+
+    virtual void RefreshCanvasSize() ORTHANC_OVERRIDE
+    {
+      // The canvas size is constant in Cairo, except if
+      // "UpdateSize()" is called
+    }
+
+    virtual unsigned int GetCanvasWidth() const ORTHANC_OVERRIDE
+    {
+      return canvas_.GetWidth();
+    }
+
+    virtual unsigned int GetCanvasHeight() const ORTHANC_OVERRIDE
+    {
+      return canvas_.GetHeight();
+    }
+    
+    void SetFont(size_t index,
+                 GlyphBitmapAlphabet* dict); // Takes ownership
+
+#if ORTHANC_ENABLE_LOCALE == 1
+    virtual void SetFont(size_t index,
+                         const std::string& ttf,
+                         unsigned int fontSize,
+                         Orthanc::Encoding codepage) ORTHANC_OVERRIDE;
+#endif
+
+    virtual void Refresh(const Scene2D& scene) ORTHANC_OVERRIDE;
+
+    virtual void ResetScene() ORTHANC_OVERRIDE
+    {
+      helper_.reset(new Internals::CompositorHelper(*this));
+    }
+
+    void UpdateSize(unsigned int canvasWidth,
+                    unsigned int canvasHeight);
+
+    Orthanc::ImageAccessor* RenderText(size_t fontIndex,
+                                       const std::string& utf8) const;
+  };
+}