// 40250 EterLib/GrpIndexBuffer.cpp over CPU memory (CpuBuffer.h).
#include "EterLib/StdAfx.h"
#include "EterLib/GrpIndexBuffer.h"
#include "EterLib/StateManager.h"

#include "CpuBuffer.h"

namespace {
BYTE* index_bytes(LPDIRECT3DINDEXBUFFER8 buffer)
{
	return static_cast<MtCpuIndexBuffer*>(buffer)->bytes.data();
}
}

LPDIRECT3DINDEXBUFFER8 CGraphicIndexBuffer::GetD3DIndexBuffer() const
{
	assert(m_lpd3dIdxBuf!=NULL);
	return m_lpd3dIdxBuf;
}

void CGraphicIndexBuffer::SetIndices(int startIndex) const
{
	STATEMANAGER.SetIndices(m_lpd3dIdxBuf, startIndex);
}

bool CGraphicIndexBuffer::Lock(void** pretIndices) const
{
	assert(m_lpd3dIdxBuf!=NULL);

	*pretIndices = index_bytes(m_lpd3dIdxBuf);
	return true;
}

void CGraphicIndexBuffer::Unlock() const
{
	assert(m_lpd3dIdxBuf!=NULL);
	static_cast<MtCpuIndexBuffer*>(m_lpd3dIdxBuf)->revision++;
}

bool CGraphicIndexBuffer::Lock(void** pretIndices)
{
	assert(m_lpd3dIdxBuf!=NULL);

	*pretIndices = index_bytes(m_lpd3dIdxBuf);
	return true;
}

void CGraphicIndexBuffer::Unlock()
{
	assert(m_lpd3dIdxBuf!=NULL);
	static_cast<MtCpuIndexBuffer*>(m_lpd3dIdxBuf)->revision++;
}

bool CGraphicIndexBuffer::Copy(int bufSize, const void* srcIndices)
{
	assert(m_lpd3dIdxBuf!=NULL);

	memcpy(index_bytes(m_lpd3dIdxBuf), srcIndices, bufSize);
	static_cast<MtCpuIndexBuffer*>(m_lpd3dIdxBuf)->revision++;
	return true;
}

bool CGraphicIndexBuffer::Create(int faceCount, TFace* faces)
{
	int idxCount = faceCount * 3;
	m_iidxCount = idxCount;
	if (!Create(idxCount, D3DFMT_INDEX16))
		return false;

	WORD* dstIndices = reinterpret_cast<WORD*>(index_bytes(m_lpd3dIdxBuf));

	for (int i = 0; i<faceCount; ++i, dstIndices+=3)
	{
		TFace * curFace=faces+i;
		dstIndices[0]=curFace->indices[0];
		dstIndices[1]=curFace->indices[1];
		dstIndices[2]=curFace->indices[2];
	}
	static_cast<MtCpuIndexBuffer*>(m_lpd3dIdxBuf)->revision++;

	return true;
}

bool CGraphicIndexBuffer::CreateDeviceObjects()
{
	MtCpuIndexBuffer* buffer = new MtCpuIndexBuffer;
	buffer->bytes.assign(m_dwBufferSize, 0);
	buffer->format = m_d3dFmt;
	m_lpd3dIdxBuf = buffer;
	return true;
}

void CGraphicIndexBuffer::DestroyDeviceObjects()
{
	delete static_cast<MtCpuIndexBuffer*>(m_lpd3dIdxBuf);
	m_lpd3dIdxBuf = NULL;
}

bool CGraphicIndexBuffer::Create(int idxCount, D3DFORMAT d3dFmt)
{
	Destroy();

	m_iidxCount = idxCount;
	m_dwBufferSize = sizeof(WORD) * idxCount;
	m_d3dFmt = d3dFmt;

	return CreateDeviceObjects();
}

void CGraphicIndexBuffer::Destroy()
{
	DestroyDeviceObjects();
}

void CGraphicIndexBuffer::Initialize()
{
	m_lpd3dIdxBuf=NULL;
	m_iidxCount=0;
	m_dwBufferSize=0;
}

CGraphicIndexBuffer::CGraphicIndexBuffer()
{
	Initialize();
}

CGraphicIndexBuffer::~CGraphicIndexBuffer()
{
	Destroy();
}