Split retained legacy engine target

CMakeLists.txt

@@ -221,12 +221,48 @@ endif()
 
 if(PP_BUILD_APP)
     if(WIN32)
-        add_library(pp_legacy_app STATIC
+        add_library(pp_legacy_engine STATIC
-            ${PP_LEGACY_APP_SOURCES}
+            ${PP_LEGACY_ENGINE_SOURCES}
             ${PP_VENDOR_SOURCES})
 
+        target_link_libraries(pp_legacy_engine
+            PUBLIC
+                pp_project_options
+            PRIVATE
+                pp_renderer_api
+                pp_project_warnings)
+        if(TARGET pp_renderer_gl)
+            target_link_libraries(pp_legacy_engine PRIVATE pp_renderer_gl)
+        endif()
+
+        target_include_directories(pp_legacy_engine
+            PUBLIC
+                ${PP_LEGACY_INCLUDE_DIRS})
+
+        target_compile_definitions(pp_legacy_engine
+            PUBLIC
+                ENUM_BITFIELDS_NOT_SUPPORTED
+                UNICODE
+                _UNICODE
+                _CRT_SECURE_NO_WARNINGS
+                _SCL_SECURE_NO_WARNINGS
+                _SILENCE_CXX17_CODECVT_HEADER_DEPRECATION_WARNING
+                _SILENCE_STDEXT_ARR_ITERS_DEPRECATION_WARNING
+                _CONSOLE
+                WITH_CURL=1)
+        set_target_properties(pp_legacy_engine PROPERTIES
+            VS_GLOBAL_CharacterSet "Unicode")
+
+        target_precompile_headers(pp_legacy_engine PRIVATE src/pch.h)
+        set_source_files_properties(${PP_VENDOR_SOURCES}
+            PROPERTIES SKIP_PRECOMPILE_HEADERS ON)
+
+        add_library(pp_legacy_app STATIC
+            ${PP_LEGACY_APP_SOURCES})
+
         target_link_libraries(pp_legacy_app
             PUBLIC
+                pp_legacy_engine
                 pp_project_options
             PRIVATE
                 pp_renderer_api
@@ -254,8 +290,6 @@ if(PP_BUILD_APP)
             VS_GLOBAL_CharacterSet "Unicode")
 
         target_precompile_headers(pp_legacy_app PRIVATE src/pch.h)
-        set_source_files_properties(${PP_VENDOR_SOURCES}
-            PROPERTIES SKIP_PRECOMPILE_HEADERS ON)
 
         add_library(pp_panopainter_ui STATIC
             ${PP_PANOPAINTER_UI_SOURCES})

cmake/PanoPainterSources.cmake

@@ -1,4 +1,4 @@
-set(PP_LEGACY_APP_SOURCES
+set(PP_LEGACY_ENGINE_SOURCES
     src/abr.cpp
     src/action.cpp
     src/asset.cpp
@@ -8,14 +8,25 @@ set(PP_LEGACY_APP_SOURCES
     src/canvas.cpp
     src/canvas_actions.cpp
     src/canvas_layer.cpp
-    src/canvas_modes.cpp
     src/event.cpp
     src/font.cpp
     src/hmd.cpp
     src/image.cpp
-    src/layout.cpp
     src/log.cpp
     src/mp4enc.cpp
+    src/rtt.cpp
+    src/serializer.cpp
+    src/settings.cpp
+    src/shader.cpp
+    src/shape.cpp
+    src/texture.cpp
+    src/util.cpp
+    src/wacom.cpp
+)
+
+set(PP_LEGACY_APP_SOURCES
+    src/canvas_modes.cpp
+    src/layout.cpp
     src/node.cpp
     src/node_border.cpp
     src/node_button.cpp
@@ -36,14 +47,6 @@ set(PP_LEGACY_APP_SOURCES
     src/node_text.cpp
     src/node_text_input.cpp
     src/pch.cpp
-    src/rtt.cpp
-    src/serializer.cpp
-    src/settings.cpp
-    src/shader.cpp
-    src/shape.cpp
-    src/texture.cpp
-    src/util.cpp
-    src/wacom.cpp
 )
 
 set(PP_PANOPAINTER_APP_SOURCES

docs/modernization/build-inventory.md

@@ -10,7 +10,7 @@ Keep it updated as platform paths move to shared CMake targets.
 
 | Platform/Target | Current Entrypoint | Notes |
 | --- | --- | --- |
-| Windows desktop | Root `CMakeLists.txt`, preset `windows-msvc-default`; target preset `windows-vs2026-x64` retained for VS 2026 | Raw `.sln/.vcxproj` files removed on 2026-05-31; local machine currently uses Visual Studio 17 2022; `PanoPainter` now links through `pp_platform_windows` and `panopainter_app`, with Windows/vendor link dependencies owned by the platform shell, runtime payload deployment in `cmake/PanoPainterRuntime.cmake`, app orchestration/version metadata owned by `panopainter_app`, and app-specific modal/dialog/panel/canvas workflow nodes owned by `pp_panopainter_ui` |
+| Windows desktop | Root `CMakeLists.txt`, preset `windows-msvc-default`; target preset `windows-vs2026-x64` retained for VS 2026 | Raw `.sln/.vcxproj` files removed on 2026-05-31; local machine currently uses Visual Studio 17 2022; `PanoPainter` now links through `pp_platform_windows` and `panopainter_app`, with Windows/vendor link dependencies owned by the platform shell, runtime payload deployment in `cmake/PanoPainterRuntime.cmake`, legacy rendering/canvas/asset/runtime sources contained by `pp_legacy_engine`, app orchestration/version metadata owned by `panopainter_app`, and app-specific modal/dialog/panel/canvas workflow nodes owned by `pp_panopainter_ui` |
 | Windows AppX | `PanoPainterPackage/Package.appxmanifest`, `.wapproj` referenced by solution | Distribution packaging |
 | macOS | `PanoPainter-OSX/` project files and `Info.plist` | Uses `NSOpenGLView` today |
 | iOS | `PanoPainter/Info.plist`, related Apple sources | Uses OpenGL ES today |
@@ -398,6 +398,10 @@ Known local toolchain state:
 Known warnings after the current CMake app build:
 
 - Legacy code/vendor warnings under `/W4`.
+- `pp_legacy_engine` intentionally contains retained vendor and legacy
+  runtime sources for now, so it concentrates existing JPEG, SQLite, Yoga,
+  poly2tri, Wacom, GLM/base64, and legacy canvas/render warnings until those
+  dependencies move to cleaner component or vcpkg ownership.
 - `pp_panopainter_ui` currently surfaces existing legacy `Node`/`Serializer`
   header and static-analysis warnings while it still depends on
   `pp_legacy_app`; these should be reduced as the UI core/app UI boundary is

docs/modernization/roadmap.md

@@ -147,6 +147,9 @@ option targets exist. The Windows desktop app builds through CMake as
 `PanoPainter` is only the executable/resource wrapper; Windows and vendor link
 dependencies now belong to the platform shell target, and Windows runtime
 payload deployment lives behind `cmake/PanoPainterRuntime.cmake`.
+`pp_legacy_engine` now contains the retained legacy rendering, canvas,
+asset/file, brush, tablet, video, serialization, and low-level runtime sources
+as an interim containment boundary while pure replacement components take over.
 `panopainter_app` is now a real static target that owns app orchestration
 sources, app version metadata, and version-header generation.
 `pp_panopainter_ui` now owns app-specific modal, dialog, panel, canvas,