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/port/SpeedTreeLib/SpeedTreeConfig.h

@@ -0,0 +1,120 @@
+///////////////////////////////////////////////////////////////////////  
+//	SpeedTreeRT runtime configuration #defines
+//
+//	(c) 2003 IDV, Inc.
+//
+//	*** INTERACTIVE DATA VISUALIZATION (IDV) PROPRIETARY INFORMATION ***
+//
+//	This software is supplied under the terms of a license agreement or
+//	nondisclosure agreement with Interactive Data Visualization and may
+//	not be copied or disclosed except in accordance with the terms of
+//	that agreement.
+//
+//      Copyright (c) 2001-2003 IDV, Inc.
+//      All Rights Reserved.
+//
+//		IDV, Inc.
+//		1233 Washington St. Suite 610
+//		Columbia, SC 29201
+//		Voice: (803) 799-1699
+//		Fax:   (803) 931-0320
+//		Web:   http://www.idvinc.com
+
+#pragma once
+
+const int		c_nNumWindMatrices = 4;
+const int		c_nNumInstancesPerModel = 10;
+const float		c_fForestSize = 200.0f;
+const float		c_fSpacingTolerance = 30.0f;
+const int		c_nMaxPlacementIterations = 500;
+const int		c_nDefaultAlphaTestValue = 84;
+const float		c_fNearLodFactor = 2.0f;
+const float		c_fFarLodFactor = 9.0f;
+const float		c_fBenchmarkPeriod = 1.0f;
+
+// vertex shader constant locations
+const int c_nVertexShader_LeafLightingAdjustment = 70;
+const int c_nVertexShader_Light = 71;
+const int c_nVertexShader_Material = 74;
+const int c_nVertexShader_TreePos = 52;
+const int c_nVertexShader_CompoundMatrix = 0;
+const int c_nVertexShader_WindMatrices = 54;
+const int c_nVertexShader_LeafTables = 4;
+const int c_nVertexShader_Fog = 85;
+
+// lighting
+const float c_afLightPosition[4] = { -0.707f, 0.0f, 0.707f, 0.0f };
+const float	c_afLightAmbient[4] = { 0.5f, 0.5f, 0.5f, 1.0f };
+const float	c_afLightDiffuse[4] = { 1.0f, 1.0f, 1.0f, 1.0f };
+const float	c_afLightSpecular[4] = { 1.0f, 1.0f, 1.0f, 1.0f };
+const float	c_afLightGlobalAmbient[4] = { 0.0f, 0.0f, 0.0f, 1.0f };
+
+
+// setup lighting (enable ONE of the two below)
+#define WRAPPER_USE_STATIC_LIGHTING
+//#define WRAPPER_USE_DYNAMIC_LIGHTING
+
+#if defined WRAPPER_USE_STATIC_LIGHTING && defined WRAPPER_USE_DYNAMIC_LIGHTING
+	#error Please define exactly one lighting mode
+#endif
+
+// setup wind (enable ONE of the three below)
+//#define WRAPPER_USE_GPU_WIND
+//#define WRAPPER_USE_CPU_WIND
+#define WRAPPER_USE_NO_WIND
+
+#if defined WRAPPER_USE_GPU_WIND && defined WRAPPER_USE_CPU_WIND
+	#error Please define exactly one lighting mode
+#elif defined WRAPPER_USE_GPU_WIND && defined WRAPPER_USE_NO_WIND
+	#error Please define exactly one lighting mode
+#elif defined WRAPPER_USE_CPU_WIND && defined WRAPPER_USE_NO_WIND
+	#error Please define exactly one lighting mode
+#endif
+
+// leaf placement algorithm (enable ONE of the two below)
+//#define WRAPPER_USE_GPU_LEAF_PLACEMENT
+#define WRAPPER_USE_CPU_LEAF_PLACEMENT
+
+#if defined WRAPPER_USE_GPU_LEAF_PLACEMENT && defined WRAPPER_USE_CPU_LEAF_PLACEMENT
+	#error Please define exactly one leaf placement algorithm
+#endif
+
+// texture coordinates (enable this define for DirectX-based engines)
+#define WRAPPER_FLIP_T_TEXCOORD
+
+// up vector
+//#define WRAPPER_UP_POS_Y
+#define WRAPPER_UP_POS_Z
+
+#if defined WRAPPER_UP_POS_Y && defined WRAPPER_UP_POS_Z
+	#error Please define exactly one up vector
+#endif
+
+// loading from STF or clones/instances? (enable ONE of the two below)
+//#define WRAPPER_FOREST_FROM_STF
+#define WRAPPER_FOREST_FROM_INSTANCES
+
+#if defined WRAPPER_FOREST_FROM_STF && defined WRAPPER_FOREST_FROM_INSTANCES
+	#error Please define exactly one loading mechanism
+#endif
+
+// billboard modes 
+#define WRAPPER_BILLBOARD_MODE
+//#define WRAPPER_RENDER_HORIZONTAL_BILLBOARD
+
+// render self-shadows
+#define WRAPPER_RENDER_SELF_SHADOWS
+
+// use fog
+#define WRAPPER_USE_FOG
+
+// derived constants
+#ifdef WRAPPER_USE_GPU_WIND
+	#define BRANCHES_USE_SHADERS
+	#define FRONDS_USE_SHADERS
+	#define LEAVES_USE_SHADERS
+#endif
+
+#ifdef WRAPPER_USE_GPU_LEAF_PLACEMENT
+	#define LEAVES_USE_SHADERS
+#endif