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// 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;
u32 stride() const override {return sizeof(T);}
u32 size() const override {return Indices.size();}
void push_back(const u32 &element) override
{
// push const ref due to compiler problem with gcc 4.6, big endian
Indices.push_back((const T&)element);
}
u32 operator [](u32 index) const override
{
return (u32)(Indices[index]);
}
u32 getLast() override {return (u32)Indices.getLast();}
void setValue(u32 index, u32 value) override
{
Indices[index]=(T)value;
}
void set_used(u32 usedNow) override
{
Indices.set_used(usedNow);
}
void reallocate(u32 new_size) override
{
Indices.reallocate(new_size);
}
u32 allocated_size() const override
{
return Indices.allocated_size();
}
void* pointer() override {return Indices.pointer();}
video::E_INDEX_TYPE getType() const override
{
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);
void setType(video::E_INDEX_TYPE IndexType) override
{
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;
}
void* getData() override {return Indices->pointer();}
video::E_INDEX_TYPE getType() const override {return Indices->getType();}
u32 stride() const override {return Indices->stride();}
u32 size() const override
{
return Indices->size();
}
void push_back(const u32 &element) override
{
Indices->push_back(element);
}
u32 operator [](u32 index) const override
{
return (*Indices)[index];
}
u32 getLast() override
{
return Indices->getLast();
}
void setValue(u32 index, u32 value) override
{
Indices->setValue(index, value);
}
void set_used(u32 usedNow) override
{
Indices->set_used(usedNow);
}
void reallocate(u32 new_size) override
{
Indices->reallocate(new_size);
}
u32 allocated_size() const override
{
return Indices->allocated_size();
}
void* pointer() override
{
return Indices->pointer();
}
//! get the current hardware mapping hint
E_HARDWARE_MAPPING getHardwareMappingHint() const override
{
return MappingHint;
}
//! set the hardware mapping hint, for driver
void setHardwareMappingHint( E_HARDWARE_MAPPING NewMappingHint ) override
{
MappingHint=NewMappingHint;
}
//! flags the mesh as changed, reloads hardware buffers
void setDirty() override
{
++ChangedID;
}
//! Get the currently used ID for identification of changes.
/** This shouldn't be used for anything outside the VideoDriver. */
u32 getChangedID() const override {return ChangedID;}
E_HARDWARE_MAPPING MappingHint;
u32 ChangedID;
};
} // end namespace scene
} // end namespace irr
#endif
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