Carla: Fix initial plugin-bridge window size

c++/carla-backend/vst.cpp

@@ -341,14 +341,34 @@ public:
 
         int32_t value   = 0;
         void* const ptr = (void*)container->winId();
+        ERect* vstRect  = nullptr;
 
 #ifdef Q_WS_X11
         value = (intptr_t)QX11Info::display();
 #endif
 
+        // get UI size before opening UI, plugin may refuse this
+        effect->dispatcher(effect, effEditGetRect, 0, 0, &vstRect, 0.0f);
+
+        if (vstRect)
+        {
+            int width  = vstRect->right  - vstRect->left;
+            int height = vstRect->bottom - vstRect->top;
+
+            if (width > 0 || height > 0)
+            {
+                container->setFixedSize(width, height);
+#ifdef BUILD_BRIDGE
+                x_engine->callback(CALLBACK_RESIZE_GUI, m_id, width, height, 1.0);
+#endif
+            }
+        }
+
+        // open UI
         if (effect->dispatcher(effect, effEditOpen, 0, value, ptr, 0.0f) == 1)
         {
-            ERect* vstRect = nullptr;
+            // get UI size again, can't fail now
+            vstRect = nullptr;
             effect->dispatcher(effect, effEditGetRect, 0, 0, &vstRect, 0.0f);
 
             if (vstRect)
@@ -358,7 +378,7 @@ public:
 
                 if (width <= 0 || height <= 0)
                 {
-                    qCritical("VstPlugin::setGuiContainer(%p) - failed to get proper window size", container);
+                    qCritical("VstPlugin::setGuiContainer(%p) - failed to get proper editor size", container);
                     return;
                 }
 
@@ -369,7 +389,7 @@ public:
                 qDebug("VstPlugin::setGuiContainer(%p) -> setFixedSize(%i, %i)", container, width, height);
             }
             else
-                qCritical("VstPlugin::setGuiContainer(%p) - failed to get plugin window size", container);
+                qCritical("VstPlugin::setGuiContainer(%p) - failed to get plugin editor size", container);
         }
         else
         {

c++/carla-bridge/carla_bridge_plugin.cpp

@@ -226,7 +226,7 @@ public:
 
         engine    = nullptr;
         plugin    = nullptr;
-        pluginGui = new BridgePluginGUI(nullptr, this);
+        pluginGui = nullptr;
 
         m_client  = this;
     }
@@ -254,6 +254,9 @@ public:
     void init()
     {
         qDebug("BridgePluginClient::init()");
+
+        pluginGui = new BridgePluginGUI(nullptr, this);
+        pluginGui->hide();
     }
 
     void exec(CarlaClient* const, const bool showGui)
@@ -552,8 +555,17 @@ public:
 
         case CarlaBackend::CALLBACK_RESIZE_GUI:
             CARLA_ASSERT(value1 > 0 && value2 > 0);
-            nextWidth  = value1;
-            nextHeight = value2;
+            if (value3 == 1.0)
+            {
+                nextWidth  = 0;
+                nextHeight = 0;
+                pluginGui->setFixedSize(value1, value2);
+            }
+            else if (nextWidth != value1 && nextHeight != value2)
+            {
+                nextWidth  = value1;
+                nextHeight = value2;
+            }
             break;
 
         case CarlaBackend::CALLBACK_RELOAD_PARAMETERS:
@@ -674,7 +686,6 @@ int main(int argc, char* argv[])
 
     qargc = argc;
     qargv = argv;
-    initSignalHandler();
 
     const char* const oscUrl   = argv[1];
     const char* const stype    = argv[2];
@@ -715,6 +726,9 @@ int main(int argc, char* argv[])
         return -1;
     }
 
+    // Listen for ctrl+c or sigint/sigterm events
+    initSignalHandler();
+
     // Init backend engine
     CarlaBackend::CarlaEngine* engine = CarlaBackend::CarlaEngine::newDriverByName("JACK");
     engine->setCallback(client.callback, &client);
@@ -737,7 +751,7 @@ int main(int argc, char* argv[])
         return 2;
     }
 
-    /// Init plugin
+    // Init plugin
     short id = engine->addPlugin(itype, filename, name, label);
     int ret;