/home/master/UCL/VisualizationLibrary/src/vlGraphics/DrawPixels.hpp

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/*  Visualization Library                                                             */
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#ifndef DrawPixels_INCLUDE_ONCE
#define DrawPixels_INCLUDE_ONCE

#include <vlGraphics/Renderable.hpp>
#include <vlGraphics/ImagePBO.hpp>
#include <vlCore/Collection.hpp>

namespace vl
{
  //-----------------------------------------------------------------------------
  // DrawPixels
  //-----------------------------------------------------------------------------
  //-----------------------------------------------------------------------------
  class VLGRAPHICS_EXPORT DrawPixels: public Renderable
  {
    VL_INSTRUMENT_CLASS(vl::DrawPixels, Renderable)

  public:
  //-----------------------------------------------------------------------------
  // Pixels
  //-----------------------------------------------------------------------------
    class VLGRAPHICS_EXPORT Pixels: public Object
    {
      VL_INSTRUMENT_CLASS(vl::DrawPixels::Pixels, Object)

      friend class DrawPixels;

    public:
      Pixels();
      Pixels(ImagePBO* img, int scrx, int scry, int startx=0, int starty=0, int width=-1, int height=-1, int alignment = AlignBottom | AlignLeft);

      Pixels(const Pixels& other);

      Pixels& operator=(const Pixels& other);

      ~Pixels();

      const ivec2& position() const { return mPosition; }

      const ivec2& start() const { return mStart; }

      const ivec2& size() const { return mSize; }

      void setPosition( const ivec2& position) { mPosition = position; }

      void setStart( const ivec2& start) { mStart = start; }

      void setSize( const ivec2& size) { mSize = size; }

      ImagePBO* image() { return mImage.get(); }

      const ImagePBO* image() const { return mImage.get(); }

      int align() const { return mAlign; }

      void setAlign(int align) { mAlign = align; }

      bool generatePixelBufferObject(EBufferObjectUsage usage, bool discard_local_storage);

      void deletePixelBufferObject();

      bool hasPixelBufferObject() const;

    protected:
      ref<ImagePBO> mImage;
      ivec2 mPosition;
      ivec2 mStart;
      ivec2 mSize;
      int mAlign;
    };
  public:

    DrawPixels();

    void computeBounds_Implementation() { setBoundingBox(AABB()); setBoundingSphere(Sphere()); }

    void render_Implementation(const Actor* actor, const Shader* shader, const Camera* camera, OpenGLContext* gl_context) const;

    const Collection<Pixels>* draws() const { return &mDraws; }
    
    Collection<Pixels>* draws() { return &mDraws; }

    void deletePixelBufferObjects();

    void releaseImages();

    bool generatePixelBufferObjects(EBufferObjectUsage usage, bool discard_local_storage);

    void setUsePixelBufferObject(bool use_pbo);

    bool usePixelBufferObject() const { return mUsePixelBufferObject; }

    // Renderable interface implementation.

    virtual void updateDirtyBufferObject(EBufferObjectUpdateMode) {}

    virtual void deleteBufferObject() {}

  protected:
    Collection<Pixels> mDraws;
    bool mUsePixelBufferObject;
  };
  //-----------------------------------------------------------------------------
}

#endif