layout: restructure into src/ tests/ android/ scripts/ tools/

- extension/src/{port,platform,codepage} -> src/; native_render -> src/host
  (+ dxt, shaders/); libgr2 -> src/gr2; extension/third_party -> third_party
- extension/tests -> tests/port, libgr2/tests -> tests/gr2
- android-native -> android (build.sh, push-client.sh moved in)
- script -> scripts; tools/40250 -> tools/server; oracle -> tools/granny-oracle;
  perf tools -> tools/perf
- all build trees under build/ (native, release, android, port-gate)
- xrender:: CMake aliases -> mt::; port-map ledger impl paths rewritten

No code changes. ctest 15/15, port_gate macos+android PASS, port_map check 0 errors.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/platform/EterLib/GrpIndexBuffer.cpp

@@ -0,0 +1,130 @@
+// 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();
+}