Split Linux platform target and move runtime/platform state

linux/src/main.cpp

@@ -3,6 +3,7 @@
 #include <glad/glad.h>
 #include <GLFW/glfw3.h>
 #include <app.h>
+#include <platform_legacy/legacy_platform_state.h>
 #include <libgen.h>
 #include <pwd.h>
 #include <unistd.h>
@@ -41,7 +42,9 @@ void linux_update_fps(int frames)
 {
     static char title_fps[512];
     sprintf(title_fps, "PanoPainter - %d fps", frames);
-    glfwSetWindowTitle(app.glfw_window, title_fps);
+    auto* const window = pp::platform::legacy::active_legacy_glfw_window_state().window;
+    if (window)
+        glfwSetWindowTitle(window, title_fps);
 }
 
 void error_log(int code, const char * s)
@@ -90,9 +93,9 @@ int main(int argc, char** args)
         });
     });
     glfwSetWindowCloseCallback(wnd, [](GLFWwindow* wnd){
-        app.ui_task([] {
+        app.ui_task([wnd] {
             if (!app.request_close())
-                glfwSetWindowShouldClose(app.glfw_window, GLFW_FALSE);
+                glfwSetWindowShouldClose(wnd, GLFW_FALSE);
         });
     });
     glfwSetWindowRefreshCallback(wnd, [](GLFWwindow* wnd){
@@ -116,11 +119,11 @@ int main(int argc, char** args)
     umask(0);
 
     App::I = &app;
+    pp::platform::legacy::set_legacy_glfw_window(wnd);
     app.initLog();
     app.create();
     app.width = 800;
     app.height = 600;
-    app.glfw_window = wnd;
     app.render_thread_start();
     app.ui_thread_start();