Shape.h

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/*

             *
            ***
           *****
   *********************       Mercenaries Engineering SARL
     *****************              Copyright (C) 2018
       *************
         *********        http://www.mercenaries-engineering.com
        ***********
       ****     ****
      **           **

*/
#pragma once

#include "Value.h"
#include "SpanSpan.h"
#include "Buffer.h"
#include "IndexedBuffer.h"
#include "SparseBuffer.h"

  namespace maquina
  {
    class MAQUINA_EXPORT Shape : public Value
    {
    public:
      Shape();


      Shape(const Value &v);

      enum Topology
      {
        constant=0,     
        vertex,         
        face,           
        face_varying,   
      };

      bool has_attribute(const char *attribute_name, Topology topology) const;


      template<typename T>
      T write_attribute(const char *attribute_name, Topology topology);


      const Value read_attribute(const char *attribute_name, Topology topology) const;

      bool set_attribute(const char *name, Topology topology, const Value &value);


      bool remove_attribute(const char *name, Topology topology);


      void finalize();

      size_t topology_size(Topology topology) const;

      struct Attribute
      {
        StringView name;
        maquina::Value value;
        maquina::Shape::Topology topology;
      };


      class MAQUINA_EXPORT Attributes
      {
      public:
        class MAQUINA_EXPORT Iterator
        {
        public:
          bool operator==(const Iterator &other) const;
          bool operator!=(const Iterator &other) const;
          Iterator& operator++();
          Iterator(const void *iterator);
          Iterator(const Iterator& other);
          ~Iterator();

          StringView name() const;
          Value value() const;
          Topology topology () const;

          Attribute operator * () const;
        private:
          const void *_internal;
        };

        Attributes(std::shared_ptr<Impl> _value);

        Iterator begin() const;
        Iterator end() const;

        size_t size() const;
      private:
        std::shared_ptr<Impl> _value;
      };

      Attributes read_attributes() const;

      Shape(std::shared_ptr<Impl> impl) { _impl=impl; }
    };

    MAQUINA_EXTERN_TEMPLATE MAQUINA_EXPORT Buffer<int32_t> Shape::write_attribute<Buffer<int32_t>>(const char *attribute_name, Topology topology);
    MAQUINA_EXTERN_TEMPLATE MAQUINA_EXPORT Buffer<uint8_t> Shape::write_attribute<Buffer<uint8_t>>(const char *attribute_name, Topology topology);
    MAQUINA_EXTERN_TEMPLATE MAQUINA_EXPORT Buffer<uint32_t> Shape::write_attribute<Buffer<uint32_t>>(const char *attribute_name, Topology topology);
    MAQUINA_EXTERN_TEMPLATE MAQUINA_EXPORT Buffer<float> Shape::write_attribute<Buffer<float>>(const char *attribute_name, Topology topology);
    MAQUINA_EXTERN_TEMPLATE MAQUINA_EXPORT Buffer<Imath::V2f> Shape::write_attribute<Buffer<Imath::V2f>>(const char *attribute_name, Topology topology);
    MAQUINA_EXTERN_TEMPLATE MAQUINA_EXPORT Buffer<Imath::V3f> Shape::write_attribute<Buffer<Imath::V3f>>(const char *attribute_name, Topology topology);
    MAQUINA_EXTERN_TEMPLATE MAQUINA_EXPORT Buffer<Imath::V4f> Shape::write_attribute<Buffer<Imath::V4f>>(const char *attribute_name, Topology topology);

    MAQUINA_EXTERN_TEMPLATE MAQUINA_EXPORT IndexedBuffer<int32_t> Shape::write_attribute<IndexedBuffer<int32_t>>(const char *attribute_name, Topology topology);
    MAQUINA_EXTERN_TEMPLATE MAQUINA_EXPORT IndexedBuffer<uint8_t> Shape::write_attribute<IndexedBuffer<uint8_t>>(const char *attribute_name, Topology topology);
    MAQUINA_EXTERN_TEMPLATE MAQUINA_EXPORT IndexedBuffer<uint32_t> Shape::write_attribute<IndexedBuffer<uint32_t>>(const char *attribute_name, Topology topology);
    MAQUINA_EXTERN_TEMPLATE MAQUINA_EXPORT IndexedBuffer<float> Shape::write_attribute<IndexedBuffer<float>>(const char *attribute_name, Topology topology);
    MAQUINA_EXTERN_TEMPLATE MAQUINA_EXPORT IndexedBuffer<Imath::V2f> Shape::write_attribute<IndexedBuffer<Imath::V2f>>(const char *attribute_name, Topology topology);
    MAQUINA_EXTERN_TEMPLATE MAQUINA_EXPORT IndexedBuffer<Imath::V3f> Shape::write_attribute<IndexedBuffer<Imath::V3f>>(const char *attribute_name, Topology topology);
    MAQUINA_EXTERN_TEMPLATE MAQUINA_EXPORT IndexedBuffer<Imath::V4f> Shape::write_attribute<IndexedBuffer<Imath::V4f>>(const char *attribute_name, Topology topology);

    MAQUINA_EXTERN_TEMPLATE MAQUINA_EXPORT SparseBuffer<int32_t> Shape::write_attribute<SparseBuffer<int32_t>>(const char *attribute_name, Topology topology);
    MAQUINA_EXTERN_TEMPLATE MAQUINA_EXPORT SparseBuffer<uint8_t> Shape::write_attribute<SparseBuffer<uint8_t>>(const char *attribute_name, Topology topology);
    MAQUINA_EXTERN_TEMPLATE MAQUINA_EXPORT SparseBuffer<uint32_t> Shape::write_attribute<SparseBuffer<uint32_t>>(const char *attribute_name, Topology topology);
    MAQUINA_EXTERN_TEMPLATE MAQUINA_EXPORT SparseBuffer<float> Shape::write_attribute<SparseBuffer<float>>(const char *attribute_name, Topology topology);
    MAQUINA_EXTERN_TEMPLATE MAQUINA_EXPORT SparseBuffer<Imath::V2f> Shape::write_attribute<SparseBuffer<Imath::V2f>>(const char *attribute_name, Topology topology);
    MAQUINA_EXTERN_TEMPLATE MAQUINA_EXPORT SparseBuffer<Imath::V3f> Shape::write_attribute<SparseBuffer<Imath::V3f>>(const char *attribute_name, Topology topology);
    MAQUINA_EXTERN_TEMPLATE MAQUINA_EXPORT SparseBuffer<Imath::V4f> Shape::write_attribute<SparseBuffer<Imath::V4f>>(const char *attribute_name, Topology topology);
  }