Pass ui scale to ui bridges

Signed-off-by: falkTX <falktx@falktx.com>

source/backend/plugin/CarlaPluginLV2.cpp

@@ -1489,6 +1489,10 @@ public:
                     if (! fPipeServer.writeMessage(tmpBuf))
                         return;
 
+                    std::snprintf(tmpBuf, 0xff, "%f\n", static_cast<double>(pData->engine->getOptions().uiScale));
+                    if (! fPipeServer.writeMessage(tmpBuf))
+                        return;
+
                     std::snprintf(tmpBuf, 0xff, "%s\n", bool2str(true)); // useTheme
                     if (! fPipeServer.writeMessage(tmpBuf))
                         return;

source/bridges-ui/CarlaBridgeFormat.cpp

@@ -228,17 +228,21 @@ bool CarlaBridgeFormat::msgReceived(const char* const msg) noexcept
     {
         double sampleRate;
         bool useTheme, useThemeColors;
+        float uiScale;
         const char* windowTitle;
         uint64_t transientWindowId;
 
         CARLA_SAFE_ASSERT_RETURN(readNextLineAsDouble(sampleRate), true);
+        CARLA_SAFE_ASSERT_RETURN(readNextLineAsFloat(uiScale), true);
         CARLA_SAFE_ASSERT_RETURN(readNextLineAsBool(useTheme), true);
         CARLA_SAFE_ASSERT_RETURN(readNextLineAsBool(useThemeColors), true);
         CARLA_SAFE_ASSERT_RETURN(readNextLineAsString(windowTitle), true);
         CARLA_SAFE_ASSERT_RETURN(readNextLineAsULong(transientWindowId), true);
 
         fGotOptions = true;
-        uiOptionsChanged(sampleRate, useTheme, useThemeColors, windowTitle, static_cast<uintptr_t>(transientWindowId));
+        uiOptionsChanged(sampleRate, uiScale,
+                         useTheme, useThemeColors,
+                         windowTitle, static_cast<uintptr_t>(transientWindowId));
 
         delete[] windowTitle;
         return true;

source/bridges-ui/CarlaBridgeFormat.hpp

@@ -69,7 +69,9 @@ protected:
     virtual void dspAtomReceived(const uint32_t index, const LV2_Atom* const atom) = 0;
     virtual void dspURIDReceived(const LV2_URID urid, const char* const uri) = 0;
 
-    virtual void uiOptionsChanged(const double sampleRate, const bool useTheme, const bool useThemeColors, const char* const windowTitle, uintptr_t transientWindowId) = 0;
+    virtual void uiOptionsChanged(const double sampleRate, const float uiScale,
+                                  const bool useTheme, const bool useThemeColors,
+                                  const char* const windowTitle, const uintptr_t transientWindowId) = 0;
 
 public:
     // ---------------------------------------------------------------------

source/bridges-ui/CarlaBridgeFormatLV2.cpp

@@ -140,14 +140,12 @@ struct Lv2PluginOptions {
     float sampleRate;
     int64_t transientWinId;
     float uiScale;
-    const char* windowTitle;
     LV2_Options_Option opts[Count];
 
     Lv2PluginOptions() noexcept
         : sampleRate(static_cast<float>(gInitialSampleRate)),
           transientWinId(0),
-          uiScale(1.0f),
-          windowTitle(kNullWindowTitle)
+          uiScale(1.0f)
     {
         LV2_Options_Option& optSampleRate(opts[SampleRate]);
         optSampleRate.context = LV2_OPTIONS_INSTANCE;
@@ -600,9 +598,17 @@ public:
         fCustomURIDs.push_back(uri);
     }
 
-    void uiOptionsChanged(const double sampleRate, const bool useTheme, const bool useThemeColors, const char* const windowTitle, uintptr_t transientWindowId) override
+    void uiOptionsChanged(const double sampleRate, const float uiScale,
+                          const bool useTheme, const bool useThemeColors,
+                          const char* const windowTitle, const uintptr_t transientWindowId) override
     {
-        carla_debug("CarlaLv2Client::uiOptionsChanged(%g, %s, %s, \"%s\", " P_UINTPTR ")", sampleRate, bool2str(useTheme), bool2str(useThemeColors), windowTitle, transientWindowId);
+        carla_debug("CarlaLv2Client::uiOptionsChanged(%f, %f, %s, %s, \"%s\", " P_UINTPTR ")",
+                    sampleRate, static_cast<double>(uiScale),
+                    bool2str(useTheme), bool2str(useThemeColors),
+                    windowTitle, transientWindowId);
+
+        // ------------------------------------------------------------------------------------------------------------
+        // sample rate
 
         const float sampleRatef = static_cast<float>(sampleRate);
 
@@ -627,23 +633,33 @@ public:
             }
         }
 
-        if (fLv2Options.windowTitle != nullptr && fLv2Options.windowTitle != kNullWindowTitle)
-            delete[] fLv2Options.windowTitle;
+        // ------------------------------------------------------------------------------------------------------------
+        // ui scale
+
+        fLv2Options.uiScale = uiScale;
 
-        fLv2Options.transientWinId = static_cast<int64_t>(transientWindowId);
-        fLv2Options.windowTitle    = carla_strdup_safe(windowTitle);
+        // ------------------------------------------------------------------------------------------------------------
+        // window title
 
-        if (fLv2Options.windowTitle == nullptr)
-            fLv2Options.windowTitle = kNullWindowTitle;
+        if (windowTitle != nullptr)
+            fUiOptions.windowTitle = windowTitle;
         else
-            fUiOptions.windowTitle = fLv2Options.windowTitle;
+            fUiOptions.windowTitle.clear();
 
-        fLv2Options.opts[Lv2PluginOptions::WindowTitle].size  = (uint32_t)std::strlen(fLv2Options.windowTitle);
-        fLv2Options.opts[Lv2PluginOptions::WindowTitle].value = fLv2Options.windowTitle;
+        fLv2Options.opts[Lv2PluginOptions::WindowTitle].size  = static_cast<uint32_t>(fUiOptions.windowTitle.length());
+        fLv2Options.opts[Lv2PluginOptions::WindowTitle].value = fUiOptions.windowTitle.buffer();
 
-        fUiOptions.useTheme          = useTheme;
-        fUiOptions.useThemeColors    = useThemeColors;
+        // ------------------------------------------------------------------------------------------------------------
+        // transient win id
+
+        fLv2Options.transientWinId = static_cast<int64_t>(transientWindowId);
         fUiOptions.transientWindowId = transientWindowId;
+
+        // ------------------------------------------------------------------------------------------------------------
+        // other
+
+        fUiOptions.useTheme       = useTheme;
+        fUiOptions.useThemeColors = useThemeColors;
     }
 
     void uiResized(const uint width, const uint height) override

source/modules/distrho/src/DistrhoPluginCarla.cpp

@@ -100,7 +100,11 @@ public:
 protected:
     void handleEditParameter(const uint32_t rindex, const bool touch)
     {
-        fHost->ui_parameter_touch(fHost->handle, rindex, touch);
+        pHost->dispatcher(pHost->handle,
+                          NATIVE_HOST_OPCODE_UI_TOUCH_PARAMETER,
+                          static_cast<int32_t>(rindex),
+                          touch ? 1 : 0,
+                          nullptr, 0.0f);
     }
 
     void handleSetParameterValue(const uint32_t rindex, const float value)