Implement UIsAlwaysOnTop option in backend; Enable ui-bridge option

resources/ui/carla_settings.ui

@@ -854,9 +854,6 @@ You can disable these checks to get a faster scanning time (at your own risk).</
             </item>
             <item row="1" column="0" colspan="3">
              <widget class="QCheckBox" name="ch_engine_prefer_ui_bridges">
-              <property name="enabled">
-               <bool>false</bool>
-              </property>
               <property name="toolTip">
                <string>Use OSC-GUI bridges when possible, this way separating the UI from DSP code</string>
               </property>

source/backend/native/distrho/DistrhoPluginCarla.cpp

@@ -19,7 +19,7 @@
 
 #include "DistrhoPluginMain.cpp"
 
-#include <QtCore/Qt>
+#include <QtCore/QSettings>
 
 #if DISTRHO_PLUGIN_HAS_UI
 # if (QT_VERSION >= QT_VERSION_CHECK(5, 0, 0))
@@ -52,7 +52,6 @@ public:
           fUi(this, 0, editParameterCallback, setParameterCallback, setStateCallback, sendNoteCallback, uiResizeCallback)
 #endif
     {
-        setWindowFlags(windowFlags()|Qt::WindowStaysOnTopHint);
 #ifdef DISTRHO_UI_OPENGL
         setCentralWidget(&fWidget);
 #else
@@ -63,6 +62,13 @@ public:
         setWindowTitle(QString("%1 (GUI)").arg(fUi.name()));
 
         uiResize(fUi.width(), fUi.height());
+
+        {
+            QSettings settings;
+
+            if (settings.value("Engine/UIsAlwaysOnTop", true).toBool())
+                setWindowFlags(windowFlags()|Qt::WindowStaysOnTopHint);
+        }
     }
 
     ~UICarla()

source/backend/plugin/CarlaPluginGui.cpp

@@ -17,6 +17,8 @@
 
 #include "CarlaPluginGui.hpp"
 
+# include <QtCore/QSettings>
+
 #ifdef Q_WS_X11
 # include <QtGui/QX11EmbedContainer>
 #endif
@@ -52,9 +54,14 @@ CarlaPluginGui::CarlaPluginGui(CarlaEngine* const engine, Callback* const callba
         setWindowFlags(windowFlags()|Qt::MSWindowsFixedSizeDialogHint);
 #endif
 
-    setWindowFlags(windowFlags()|Qt::WindowStaysOnTopHint);
-
     connect(this, SIGNAL(setSizeSafeSignal(int,int)), SLOT(setSizeSafeSlot(int,int)));
+
+    {
+        QSettings settings;
+
+        if (settings.value("Engine/UIsAlwaysOnTop", true).toBool())
+            setWindowFlags(windowFlags()|Qt::WindowStaysOnTopHint);
+    }
 }
 
 CarlaPluginGui::~CarlaPluginGui()

source/backend/plugin/Lv2Plugin.cpp

@@ -3239,6 +3239,45 @@ protected:
 
     // -------------------------------------------------------------------
 
+    LV2_Worker_Status handleWorkerSchedule(const uint32_t size, const void* const data)
+    {
+        carla_stdout("Lv2Plugin::handleWorkerSchedule(%i, %p)", size, data);
+
+#if 0
+        if (! ext.worker)
+        {
+            carla_stderr("Lv2Plugin::handleWorkerSchedule(%i, %p) - plugin has no worker", size, data);
+            return LV2_WORKER_ERR_UNKNOWN;
+        }
+
+        if (x_engine->isOffline())
+            ext.worker->work(handle, carla_lv2_worker_respond, this, size, data);
+        else
+            postponeEvent(PluginPostEventCustom, size, 0, 0.0, data);
+#endif
+
+        return LV2_WORKER_SUCCESS;
+    }
+
+    LV2_Worker_Status handleWorkerRespond(const uint32_t size, const void* const data)
+    {
+        carla_stdout("Lv2Plugin::handleWorkerRespond(%i, %p)", size, data);
+
+#if 0
+        LV2_Atom_Worker workerAtom;
+        workerAtom.atom.type = CARLA_URI_MAP_ID_ATOM_WORKER;
+        workerAtom.atom.size = sizeof(LV2_Atom_Worker_Body);
+        workerAtom.body.size = size;
+        workerAtom.body.data = data;
+
+        atomQueueIn.put(0, (const LV2_Atom*)&workerAtom);
+#endif
+
+        return LV2_WORKER_SUCCESS;
+    }
+
+    // -------------------------------------------------------------------
+
     void handleExternalUiClosed()
     {
         CARLA_ASSERT(fUi.type == PLUGIN_UI_EXTERNAL);
@@ -3595,6 +3634,9 @@ public:
         fFeatures[kFeatureIdWorker]->URI      = LV2_WORKER__schedule;
         fFeatures[kFeatureIdWorker]->data     = workerFt;
 
+        if (! needsFixedBuffer())
+            fFeatures[kFeatureIdBufSizeFixed]->URI = LV2_BUF_SIZE__boundedBlockLength;
+
         // ---------------------------------------------------------------
         // get DLL main entry
 
@@ -4475,12 +4517,7 @@ private:
         if (handle == nullptr)
             return LV2_WORKER_ERR_UNKNOWN;
 
-        //return ((Lv2Plugin*)handle)->handleWorkerSchedule(size, data);
-        return LV2_WORKER_ERR_UNKNOWN;
-
-        // todo
-        (void)size;
-        (void)data;
+        return ((Lv2Plugin*)handle)->handleWorkerSchedule(size, data);
     }
 
     static LV2_Worker_Status carla_lv2_worker_respond(LV2_Worker_Respond_Handle handle, uint32_t size, const void* data)
@@ -4491,12 +4528,7 @@ private:
         if (handle == nullptr)
             return LV2_WORKER_ERR_UNKNOWN;
 
-        //return ((Lv2Plugin*)handle)->handleWorkerRespond(size, data);
-        return LV2_WORKER_ERR_UNKNOWN;
-
-        // todo
-        (void)size;
-        (void)data;
+        return ((Lv2Plugin*)handle)->handleWorkerRespond(size, data);
     }
 
     // -------------------------------------------------------------------