Split Apple platform target and move platform state ownership

src/platform_legacy/legacy_platform_state.cpp

@@ -3,6 +3,10 @@
 
 #include "app.h"
 
+#if defined(__LINUX__) || defined(__WEB__)
+#include <GLFW/glfw3.h>
+#endif
+
 namespace pp::platform::legacy {
 namespace {
 
@@ -12,6 +16,50 @@ struct RetainedLegacyStoragePaths final {
 
 }
 
+#if defined(__LINUX__) || defined(__WEB__)
+[[nodiscard]] RetainedLegacyGlfwWindowState& active_legacy_glfw_window_state()
+{
+    static RetainedLegacyGlfwWindowState state = [] {
+        RetainedLegacyGlfwWindowState retained;
+        retained.window = App::I->glfw_window;
+        retained.hooks.acquire_render_context = [window = retained.window] {
+            glfwMakeContextCurrent(window);
+        };
+        retained.hooks.present_render_context = [window = retained.window] {
+            glfwSwapBuffers(window);
+        };
+        retained.hooks.request_app_close = [window = retained.window] {
+            glfwSetWindowShouldClose(window, GLFW_TRUE);
+        };
+        return retained;
+    }();
+    return state;
+}
+
+[[nodiscard]] RetainedLegacyGlfwWindowHooks& active_legacy_glfw_window_hooks()
+{
+    return active_legacy_glfw_window_state().hooks;
+}
+#endif
+
+#if defined(__IOS__) || defined(__OSX__)
+[[nodiscard]] RetainedLegacyAppleState& active_legacy_apple_state()
+{
+    static RetainedLegacyAppleState state = [] {
+        RetainedLegacyAppleState retained;
+#ifdef __IOS__
+        retained.ios_view = App::I->ios_view;
+        retained.ios_app = App::I->ios_app;
+#elif defined(__OSX__)
+        retained.osx_view = App::I->osx_view;
+        retained.osx_app = App::I->osx_app;
+#endif
+        return retained;
+    }();
+    return state;
+}
+#endif
+
 [[nodiscard]] const pp::platform::PlatformStoragePaths& active_legacy_storage_paths()
 {
     static RetainedLegacyStoragePaths state = [] {