fix(bridge): anchored fx-gui embed - dance dat window dung panel rect, khong park/restore cursor, resize view qua WM_FXGUI_RESIZE

native_bridge/src/RenderFxJob.cpp

@@ -689,6 +689,37 @@ public:
             delete s->plugFrame;
             s->plugFrame = nullptr;
         }
+#endif
+    }
+    // Resize the editor view to w x h (VST3 host resize flow: checkSizeConstraint
+    // lets the plugin clamp to a supported size, host resizes the window, then
+    // onSize tells the plugin -- it moves/resizes its own child window). Runs on
+    // the GUI pump thread (WM_FXGUI_RESIZE) -- plugin calls must not come from
+    // the HTTP worker thread.
+    bool resizeEditor(void* parentWindowHandle, int w, int h) {
+#ifndef HAVE_VST3SDK
+        (void)parentWindowHandle; (void)w; (void)h;
+        return false;
+#else
+        auto* s = static_cast<Vst3FxState*>(state_);
+        if (!s || !s->view || w <= 0 || h <= 0) return false;
+        Steinberg::ViewRect vr = {0, 0, w, h};
+        s->view->checkSizeConstraint(&vr);  // plugin clamps to a supported size
+        const int cw = vr.right - vr.left;
+        const int ch = vr.bottom - vr.top;
+        if (cw <= 0 || ch <= 0) return false;
+#ifdef _WIN32
+        RECT r = {0, 0, cw, ch};
+        AdjustWindowRectEx(&r,
+                           (DWORD)GetWindowLongPtrA((HWND)parentWindowHandle, GWL_STYLE),
+                           FALSE,
+                           (DWORD)GetWindowLongPtrA((HWND)parentWindowHandle, GWL_EXSTYLE));
+        SetWindowPos((HWND)parentWindowHandle, nullptr, 0, 0,
+                     r.right - r.left, r.bottom - r.top,
+                     SWP_NOMOVE | SWP_NOZORDER | SWP_NOACTIVATE);
+#endif
+        s->view->onSize(&vr);
+        return true;
 #endif
     }
     bool loaded() const { return state_ != nullptr; }
@@ -892,6 +923,10 @@ int run_render_fx_job(const std::string& jobPath, const std::string& inPath,
 
 // --- --open-fx-gui <job.json>: native editor window for one VST3 FX ----------
 #ifdef _WIN32
+// Worker (HTTP) thread -> pump thread editor-resize request. Declared
+// outside the anonymous namespace: the definition sits after the namespace.
+static void fxGuiResizeSafe(void* fx, HWND hwnd, int w, int h);
+
 namespace {
 
 const char* kFxGuiWndClass = "SonicForge_FX_GUI_Class";
@@ -900,6 +935,10 @@ struct FxGuiCtx {
     bool closing = false;
 };
 
+// Worker (HTTP) thread -> pump thread editor-resize request. The plugin's
+// checkSizeConstraint/onSize must run on the thread that owns the editor.
+#define WM_FXGUI_RESIZE (WM_APP + 0x51)
+
 LRESULT CALLBACK FxGuiWndProc(HWND hwnd, UINT msg, WPARAM wp, LPARAM lp) {
     FxGuiCtx* ctx = (FxGuiCtx*)GetWindowLongPtrA(hwnd, GWLP_USERDATA);
     switch (msg) {
@@ -909,6 +948,9 @@ LRESULT CALLBACK FxGuiWndProc(HWND hwnd, UINT msg, WPARAM wp, LPARAM lp) {
         case WM_DESTROY:
             if (ctx) ctx->closing = true;
             return 0;
+        case WM_FXGUI_RESIZE:
+            fxGuiResizeSafe((void*)GetPropA(hwnd, "FXGUI_FX"), hwnd, (int)wp, (int)lp);
+            return 0;
         default:
             return DefWindowProcA(hwnd, msg, wp, lp);
     }
@@ -934,6 +976,18 @@ static void fxGuiDetachSafe(void* fx) {
     (void)fx;
 #endif
 }
+static void fxGuiResizeSafe(void* fx, HWND hwnd, int w, int h) {
+#ifdef HAVE_VST3SDK
+    __try { static_cast<Vst3Fx*>(fx)->resizeEditor(hwnd, w, h); }
+    __except (EXCEPTION_EXECUTE_HANDLER) {}
+#else
+    (void)fx; (void)hwnd; (void)w; (void)h;
+#endif
+}
+// Worker (HTTP) thread asks the GUI pump thread to resize the plugin view.
+void fxGuiRequestResize(HWND hwnd, int w, int h) {
+    PostMessageA(hwnd, WM_FXGUI_RESIZE, (WPARAM)w, (LPARAM)h);
+}
 
 // Shared setup for both GUI modes: parse job, load plugin, create host window
 // (offscreen for embedded capture), attach editor (SEH-guarded). Returns 0 ok,
@@ -1034,8 +1088,10 @@ int run_fx_gui_server(const std::string& jobPath) {
     HWND hwnd = nullptr;
     const int rc = fxGuiSetup(jobPath, &fx, &hwnd, /*offscreen=*/true, 0);
     if (rc) return rc;
+    SetPropA(hwnd, "FXGUI_FX", &fx);  // for WM_FXGUI_RESIZE on the pump thread
 
     const int srv = fxGuiServerLoop(hwnd);
+    RemovePropA(hwnd, "FXGUI_FX");
     fxGuiDetachSafe(&fx);
     std::cout << "[FxGuiServer] closed" << std::endl;
     return srv;