Bind non-Windows platform services explicitly

android/src/cpp/main.cpp

@@ -31,6 +31,7 @@
 
 #include "pch.h"
 #include "app.h"
+#include "platform_legacy/legacy_platform_services.h"
 #include "platform_legacy/legacy_platform_state.h"
 #include "asset.h"
 #include "keymap.h"
@@ -1091,6 +1092,7 @@ void android_main(struct android_app* state) {
     app_dummy();
 
     App::I = new App;
+    App::I->set_platform_services(&pp::platform::legacy::platform_services());
 
     memset(&g_engine, 0, sizeof(g_engine));
     state->userData = &g_engine;

docs/modernization/roadmap.md

@@ -70,6 +70,13 @@ What is already real:
 - `pp_app_core`
 
 Latest slice:
+- `src/app_events.cpp` no longer silently falls back to
+  `pp::platform::legacy::platform_services()` when `App` has no bound platform
+  services; the live app path now expects explicit platform-service ownership.
+- `linux/src/main.cpp`, `webgl/src/main.cpp`, and `android/src/cpp/main.cpp`
+  now bind `pp::platform::legacy::platform_services()` explicitly at app
+  creation instead of relying on the hidden fallback in `App` event/platform
+  dispatch.
 - `src/platform_windows/windows_runtime_shell.cpp` now owns the Windows tablet
   object directly; the composition edge no longer binds `&WacomTablet::I` into
   the Windows runtime path.

docs/modernization/tasks.md

@@ -78,6 +78,12 @@ Completed, blocked, and superseded task history moved to
   the queue is now ordered by code movement instead.
 
 Current slice:
+- `src/app_events.cpp` no longer hides a fallback to
+  `pp::platform::legacy::platform_services()`; touched app platform dispatch
+  now expects an explicitly bound platform-services pointer.
+- `linux/src/main.cpp`, `webgl/src/main.cpp`, and `android/src/cpp/main.cpp`
+  now bind `pp::platform::legacy::platform_services()` explicitly at app
+  creation, removing the hidden fallback path from live non-Windows entrypoints.
 - `src/platform_windows/windows_runtime_shell.cpp` now owns the Windows tablet
   object directly, removing the composition-edge `WacomTablet::I` binding from
   the touched Windows runtime path.

linux/src/main.cpp

@@ -4,6 +4,7 @@
 #include <GLFW/glfw3.h>
 #include <app.h>
 #include <platform_legacy/legacy_platform_state.h>
+#include <platform_legacy/legacy_platform_services.h>
 #include <libgen.h>
 #include <pwd.h>
 #include <unistd.h>
@@ -120,6 +121,7 @@ int main(int argc, char** args)
 
     App::I = &app;
     pp::platform::legacy::set_legacy_glfw_window(wnd);
+    app.set_platform_services(&pp::platform::legacy::platform_services());
     app.initLog();
     app.create();
     app.width = 800;

src/app_events.cpp

@@ -16,7 +16,6 @@
 #include "platform_windows/windows_platform_services.h"
 #endif
 #include "platform_legacy/legacy_platform_state.h"
-#include "platform_legacy/legacy_platform_services.h"
 #include "renderer_gl/opengl_capabilities.h"
 
 namespace {
@@ -48,12 +47,10 @@ namespace {
 
 [[nodiscard]] pp::platform::PlatformServices& active_platform_services(const App* app)
 {
-    if (app)
+    assert(app);
-    {
+    auto* services = app->platform_services();
-        if (auto* services = app->platform_services())
+    assert(services);
     return *services;
-    }
-    return pp::platform::legacy::platform_services();
 }
 
 }

src/platform_legacy/legacy_platform_services.cpp

@@ -259,11 +259,8 @@ public:
     void publish_exported_image(std::string_view path) override
     {
         const auto family = pp::platform::current_platform_family();
-        if (pp::platform::legacy::handles_legacy_web_platform_family(family))
+        if (pp::platform::legacy::try_publish_legacy_web_exported_image(family, path))
-        {
-            pp::platform::legacy::publish_legacy_web_exported_image(path);
             return;
-        }
         if (!pp::platform::platform_publishes_exported_images(family))
         {
             (void)path;
@@ -279,11 +276,8 @@ public:
     void flush_persistent_storage() override
     {
         const auto family = pp::platform::current_platform_family();
-        if (pp::platform::legacy::handles_legacy_web_platform_family(family))
+        if (pp::platform::legacy::try_flush_legacy_web_persistent_storage(family))
-        {
-            pp::platform::legacy::flush_legacy_web_persistent_storage();
             return;
-        }
         if (!pp::platform::platform_flushes_persistent_storage(family))
             return;
     }
@@ -449,8 +443,9 @@ public:
     [[nodiscard]] int default_canvas_resolution() override
     {
         const auto family = pp::platform::current_platform_family();
-        if (pp::platform::legacy::handles_legacy_web_platform_family(family))
+        int resolution = 0;
-            return pp::platform::legacy::default_legacy_web_canvas_resolution();
+        if (pp::platform::legacy::try_default_legacy_web_canvas_resolution(family, resolution))
+            return resolution;
         return pp::platform::platform_default_canvas_resolution(family);
     }
 
@@ -527,11 +522,12 @@ public:
         pp::platform::PreparedFileCallback callback) override
     {
         const auto family = pp::platform::current_platform_family();
-        if (pp::platform::legacy::handles_legacy_web_platform_family(family))
+        if (pp::platform::legacy::try_save_legacy_web_prepared_file(
-        {
+                family,
-            pp::platform::legacy::save_legacy_web_prepared_file(path, suggested_name, std::move(callback));
+                path,
+                suggested_name,
+                std::move(callback)))
             return;
-        }
 
         const std::string value(path);
         const std::string name(suggested_name);

src/platform_legacy/legacy_platform_state.cpp

@@ -108,16 +108,47 @@ void publish_legacy_web_exported_image(std::string_view path)
     active_legacy_web_platform_services().publish_exported_image(path);
 }
 
+[[nodiscard]] bool try_publish_legacy_web_exported_image(
+    pp::platform::PlatformFamily family,
+    std::string_view path)
+{
+    if (!handles_legacy_web_platform_family(family))
+        return false;
+
+    publish_legacy_web_exported_image(path);
+    return true;
+}
+
 void flush_legacy_web_persistent_storage()
 {
     active_legacy_web_platform_services().flush_persistent_storage();
 }
 
+[[nodiscard]] bool try_flush_legacy_web_persistent_storage(pp::platform::PlatformFamily family)
+{
+    if (!handles_legacy_web_platform_family(family))
+        return false;
+
+    flush_legacy_web_persistent_storage();
+    return true;
+}
+
 [[nodiscard]] int default_legacy_web_canvas_resolution() noexcept
 {
     return active_legacy_web_platform_services().default_canvas_resolution();
 }
 
+[[nodiscard]] bool try_default_legacy_web_canvas_resolution(
+    pp::platform::PlatformFamily family,
+    int& resolution) noexcept
+{
+    if (!handles_legacy_web_platform_family(family))
+        return false;
+
+    resolution = default_legacy_web_canvas_resolution();
+    return true;
+}
+
 void save_legacy_web_prepared_file(
     std::string_view path,
     std::string_view suggested_name,
@@ -129,6 +160,19 @@ void save_legacy_web_prepared_file(
         std::move(callback));
 }
 
+[[nodiscard]] bool try_save_legacy_web_prepared_file(
+    pp::platform::PlatformFamily family,
+    std::string_view path,
+    std::string_view suggested_name,
+    pp::platform::PreparedFileCallback callback)
+{
+    if (!handles_legacy_web_platform_family(family))
+        return false;
+
+    save_legacy_web_prepared_file(path, suggested_name, std::move(callback));
+    return true;
+}
+
 [[nodiscard]] const pp::platform::PlatformStoragePaths& active_legacy_storage_paths()
 {
     return retained_legacy_storage_paths().storage_paths;

src/platform_legacy/legacy_platform_state.h

@@ -24,12 +24,25 @@ void request_legacy_glfw_app_close();
 [[nodiscard]] pp::platform::WebPlatformServices& active_legacy_web_platform_services();
 [[nodiscard]] bool handles_legacy_web_platform_family(pp::platform::PlatformFamily family) noexcept;
 void publish_legacy_web_exported_image(std::string_view path);
+[[nodiscard]] bool try_publish_legacy_web_exported_image(
+    pp::platform::PlatformFamily family,
+    std::string_view path);
 void flush_legacy_web_persistent_storage();
+[[nodiscard]] bool try_flush_legacy_web_persistent_storage(
+    pp::platform::PlatformFamily family);
 [[nodiscard]] int default_legacy_web_canvas_resolution() noexcept;
+[[nodiscard]] bool try_default_legacy_web_canvas_resolution(
+    pp::platform::PlatformFamily family,
+    int& resolution) noexcept;
 void save_legacy_web_prepared_file(
     std::string_view path,
     std::string_view suggested_name,
     pp::platform::PreparedFileCallback callback);
+[[nodiscard]] bool try_save_legacy_web_prepared_file(
+    pp::platform::PlatformFamily family,
+    std::string_view path,
+    std::string_view suggested_name,
+    pp::platform::PreparedFileCallback callback);
 
 [[nodiscard]] const pp::platform::PlatformStoragePaths& active_legacy_storage_paths();
 void set_legacy_storage_paths(pp::platform::PlatformStoragePaths paths);

src/platform_windows/windows_runtime_shell.cpp

@@ -16,12 +16,25 @@ namespace pp::platform::windows {
 
 namespace {
 
+struct RetainedMainWindowSessionState final {
+    HINSTANCE instance{};
+    HWND handle{};
+    wchar_t title[512]{};
+    bool sandboxed = false;
+};
+
 struct RetainedWindowsRuntimeState final {
     std::unique_ptr<App> owned_app;
     App* app = nullptr;
     WacomTablet tablet;
 };
 
+[[nodiscard]] RetainedMainWindowSessionState& retained_main_window_session_state()
+{
+    static RetainedMainWindowSessionState state;
+    return state;
+}
+
 [[nodiscard]] RetainedWindowsRuntimeState& retained_runtime_state()
 {
     static RetainedWindowsRuntimeState state;
@@ -142,28 +155,28 @@ WacomTablet* bound_wacom_tablet() noexcept
 
 HWND main_window_handle() noexcept
 {
-    return retained_state().hWnd;
+    return retained_main_window_session_state().handle;
 }
 
 const wchar_t* main_window_title() noexcept
 {
-    return retained_state().window_title;
+    return retained_main_window_session_state().title;
 }
 
 bool main_window_sandboxed() noexcept
 {
-    return retained_state().sandboxed;
+    return retained_main_window_session_state().sandboxed;
 }
 
 void set_main_window_sandboxed(bool sandboxed) noexcept
 {
-    retained_state().sandboxed = sandboxed;
+    retained_main_window_session_state().sandboxed = sandboxed;
 }
 
 int run_main_application(int argc, char** argv)
 {
-    auto& state = retained_state();
+    auto& main_window_state = retained_main_window_session_state();
-    state.hInst = GetModuleHandle(NULL);
+    main_window_state.instance = GetModuleHandle(NULL);
 
     auto& runtime_state = retained_runtime_state();
     runtime_state.owned_app = std::make_unique<App>();
@@ -180,7 +193,7 @@ int run_main_application(int argc, char** argv)
 
     pp::platform::windows::ensure_runtime_data_directory();
 
-    pp::platform::windows::SplashScreen splash(state.hInst);
+    pp::platform::windows::SplashScreen splash(main_window_state.instance);
 
     pp::platform::windows::initialize_retained_input_state();
 
@@ -192,7 +205,12 @@ int run_main_application(int argc, char** argv)
 
     auto startup = pp::platform::windows::initialize_main_window_startup_state(*app);
     auto context = pp::platform::windows::OpenGlWindowContext {};
-    switch (pp::platform::windows::initialize_main_window_and_gl(startup, state.hWnd, state.hInst, state.window_title, context))
+    switch (pp::platform::windows::initialize_main_window_and_gl(
+        startup,
+        main_window_state.handle,
+        main_window_state.instance,
+        main_window_state.title,
+        context))
     {
     case pp::platform::windows::MainStartupResult::Ok:
         break;
@@ -231,30 +249,30 @@ int run_main_application(int argc, char** argv)
 
 void run_main_window_runtime(const MainWindowStartupState& startup, bool start_in_vr, SplashScreen& splash)
 {
-    auto& state = retained_state();
+    auto& main_window_state = retained_main_window_session_state();
     auto* app = bound_app();
-    register_touch_window(state.hWnd);
+    register_touch_window(main_window_state.handle);
 
     wglMakeCurrent(NULL, NULL);
 
     initialize_runtime_threads();
     install_debug_gl_callbacks();
-    initialize_wintab(state.hWnd, state.sandboxed);
+    initialize_wintab(main_window_state.handle, main_window_state.sandboxed);
-    set_main_window_icon(state.hWnd);
+    set_main_window_icon(main_window_state.handle);
 
     app->ui_sync();
-    restore_window_placement(state.hWnd, startup.show_command);
+    restore_window_placement(main_window_state.handle, startup.show_command);
 
     if (start_in_vr)
         app->vr_start();
 
     LOG("show main window");
-    SetForegroundWindow(state.hWnd);
+    SetForegroundWindow(main_window_state.handle);
 
     splash.dismiss();
 
     run_main_message_loop();
-    shutdown_main_window_runtime(startup, state.hInst);
+    shutdown_main_window_runtime(startup, main_window_state.instance);
 }
 
 }

src/platform_windows/windows_window_shell.h

@@ -8,12 +8,8 @@
 
 struct RetainedState
 {
-    HINSTANCE hInst{};
-    HWND hWnd{};
     bool keys[256]{};
     std::map<kKey, int> vkey_map;
-    wchar_t window_title[512]{};
-    bool sandboxed = false;
     pp::platform::windows::VrShellState vr;
 };
 

webgl/src/main.cpp

@@ -6,6 +6,7 @@
 #include <chrono>
 #include <app.h>
 #include <platform_legacy/legacy_platform_state.h>
+#include <platform_legacy/legacy_platform_services.h>
 #include <fstream>
 #include <keymap.h>
 
@@ -119,6 +120,7 @@ void StartApp()
 {
     App::I = &app;
     pp::platform::legacy::set_legacy_glfw_window(wnd);
+    app.set_platform_services(&pp::platform::legacy::platform_services());
     app.initLog();
     app.create();
     app.width = 1024;