Add the renderer process

The renderer becomes two programs: the adapter (t5deRenderEngine.dll, 32-bit, in IMVU's process) and a 64-bit renderer process (t5de-renderer.exe) drawing with Diligent Engine, fetched with FetchContent and pinned. For now a spike: the adapter starts the renderer process for each engine and signals each frame through a shared memory channel, and the renderer process draws a box into a child window in the client's 3D view.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

CMakePresets.json

@@ -3,29 +3,43 @@
   "cmakeMinimumRequired": { "major": 3, "minor": 28, "patch": 0 },
   "configurePresets": [
     {
-      "name": "windows-x86",
-      "displayName": "Windows, 32-bit (Visual Studio Build Tools)",
-      "description": "IMVU Classic is a 32-bit Visual C++ program: build for Win32 with MSVC.",
+      "name": "windows",
+      "hidden": true,
       "generator": "Visual Studio 18 2026",
-      "architecture": { "value": "Win32", "strategy": "set" },
       "binaryDir": "${sourceDir}/build/${presetName}",
-      "installDir": "${sourceDir}/build/${presetName}/install",
+      "installDir": "${sourceDir}/build/install",
       "condition": { "type": "equals", "lhs": "${hostSystemName}", "rhs": "Windows" }
+    },
+    {
+      "name": "windows-x86",
+      "inherits": "windows",
+      "displayName": "Adapter (32-bit)",
+      "description": "t5deRenderEngine.dll, loaded into IMVU Classic, a 32-bit Visual C++ program.",
+      "architecture": { "value": "Win32", "strategy": "set" }
+    },
+    {
+      "name": "windows-x64",
+      "inherits": "windows",
+      "displayName": "Renderer process (64-bit)",
+      "description": "t5de-renderer.exe, with Diligent Engine (fetched and built on the first configure).",
+      "architecture": { "value": "x64", "strategy": "set" }
     }
   ],
   "buildPresets": [
-    { "name": "debug", "configurePreset": "windows-x86", "configuration": "Debug" },
-    { "name": "release", "configurePreset": "windows-x86", "configuration": "Release" }
+    { "name": "adapter-debug", "configurePreset": "windows-x86", "configuration": "Debug" },
+    { "name": "adapter-release", "configurePreset": "windows-x86", "configuration": "Release" },
+    { "name": "renderer-debug", "configurePreset": "windows-x64", "configuration": "Debug" },
+    { "name": "renderer-release", "configurePreset": "windows-x64", "configuration": "Release" }
   ],
   "testPresets": [
     {
-      "name": "debug",
+      "name": "adapter-debug",
       "configurePreset": "windows-x86",
       "configuration": "Debug",
       "output": { "outputOnFailure": true }
     },
     {
-      "name": "release",
+      "name": "adapter-release",
       "configurePreset": "windows-x86",
       "configuration": "Release",
       "output": { "outputOnFailure": true }
@@ -33,11 +47,18 @@
   ],
   "workflowPresets": [
     {
-      "name": "release",
+      "name": "adapter",
       "steps": [
         { "type": "configure", "name": "windows-x86" },
-        { "type": "build", "name": "release" },
-        { "type": "test", "name": "release" }
+        { "type": "build", "name": "adapter-release" },
+        { "type": "test", "name": "adapter-release" }
+      ]
+    },
+    {
+      "name": "renderer",
+      "steps": [
+        { "type": "configure", "name": "windows-x64" },
+        { "type": "build", "name": "renderer-release" }
       ]
     }
   ]