CIndexBuffer.h

Go to the documentation of this file.

// Copyright (C) 2008-2012 Nikolaus Gebhardt
// This file is part of the "Irrlicht Engine".
// For conditions of distribution and use, see copyright notice in irrlicht.h

#ifndef __C_INDEX_BUFFER_H_INCLUDED__
#define __C_INDEX_BUFFER_H_INCLUDED__

#include "IIndexBuffer.h"

namespace irr
{
namespace scene
{

    class CIndexBuffer : public IIndexBuffer
    {

        class IIndexList
        {
        public:
            virtual ~IIndexList(){};

            virtual u32 stride() const =0;
            virtual u32 size() const =0;
            virtual void push_back(const u32 &element) =0;
            virtual u32 operator [](u32 index) const =0;
            virtual u32 getLast() =0;
            virtual void setValue(u32 index, u32 value) =0;
            virtual void set_used(u32 usedNow) =0;
            virtual void reallocate(u32 new_size) =0;
            virtual u32 allocated_size() const =0;
            virtual void* pointer() =0;
            virtual video::E_INDEX_TYPE getType() const =0;
        };

        template <class T>
        class CSpecificIndexList : public IIndexList
        {
        public:
            core::array<T> Indices;

            virtual u32 stride() const {return sizeof(T);}

            virtual u32 size() const {return Indices.size();}

            virtual void push_back(const u32 &element)
            {
                // push const ref due to compiler problem with gcc 4.6, big endian
                Indices.push_back((const T&)element);
            }

            virtual u32 operator [](u32 index) const
            {
                return (u32)(Indices[index]);
            }

            virtual u32 getLast() {return (u32)Indices.getLast();}

            virtual void setValue(u32 index, u32 value)
            {
                Indices[index]=(T)value;
            }

            virtual void set_used(u32 usedNow)
            {
                Indices.set_used(usedNow);
            }

            virtual void reallocate(u32 new_size)
            {
                Indices.reallocate(new_size);
            }

            virtual u32 allocated_size() const
            {
                return Indices.allocated_size();
            }

            virtual void* pointer() {return Indices.pointer();}

            virtual video::E_INDEX_TYPE getType() const
            {
                if (sizeof(T)==sizeof(u16))
                    return video::EIT_16BIT;
                else
                    return video::EIT_32BIT;
            }
        };

    public:
        IIndexList *Indices;

        CIndexBuffer(video::E_INDEX_TYPE IndexType) :Indices(0), MappingHint(EHM_NEVER), ChangedID(1)
        {
            setType(IndexType);
        }

        CIndexBuffer(const IIndexBuffer &IndexBufferCopy) :Indices(0), MappingHint(EHM_NEVER), ChangedID(1)
        {
            setType(IndexBufferCopy.getType());
            reallocate(IndexBufferCopy.size());

            for (u32 n=0;n<IndexBufferCopy.size();++n)
                push_back(IndexBufferCopy[n]);
        }

        virtual ~CIndexBuffer()
        {
            delete Indices;
        }

        //virtual void setType(video::E_INDEX_TYPE IndexType);
        virtual void setType(video::E_INDEX_TYPE IndexType)
        {
            IIndexList *NewIndices=0;

            switch (IndexType)
            {
                case video::EIT_16BIT:
                {
                    NewIndices=new CSpecificIndexList<u16>;
                    break;
                }
                case video::EIT_32BIT:
                {
                    NewIndices=new CSpecificIndexList<u32>;
                    break;
                }
            }

            if (Indices)
            {
                NewIndices->reallocate( Indices->size() );

                for(u32 n=0;n<Indices->size();++n)
                    NewIndices->push_back((*Indices)[n]);

                delete Indices;
            }

            Indices=NewIndices;
        }

        virtual void* getData() {return Indices->pointer();}

        virtual video::E_INDEX_TYPE getType() const {return Indices->getType();}

        virtual u32 stride() const {return Indices->stride();}

        virtual u32 size() const
        {
            return Indices->size();
        }

        virtual void push_back(const u32 &element)
        {
            Indices->push_back(element);
        }

        virtual u32 operator [](u32 index) const
        {
            return (*Indices)[index];
        }

        virtual u32 getLast()
        {
            return Indices->getLast();
        }

        virtual void setValue(u32 index, u32 value)
        {
            Indices->setValue(index, value);
        }

        virtual void set_used(u32 usedNow)
        {
            Indices->set_used(usedNow);
        }

        virtual void reallocate(u32 new_size)
        {
            Indices->reallocate(new_size);
        }

        virtual u32 allocated_size() const
        {
            return Indices->allocated_size();
        }

        virtual void* pointer()
        {
            return Indices->pointer();
        }

        virtual E_HARDWARE_MAPPING getHardwareMappingHint() const
        {
            return MappingHint;
        }

        virtual void setHardwareMappingHint( E_HARDWARE_MAPPING NewMappingHint )
        {
            MappingHint=NewMappingHint;
        }

        virtual void setDirty()
        {
            ++ChangedID;
        }


        virtual u32 getChangedID() const {return ChangedID;}

        E_HARDWARE_MAPPING MappingHint;
        u32 ChangedID;
    };


} // end namespace scene
} // end namespace irr

#endif