Fix light mode nsvg cleanup

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

dpf

@@ -1 +1 @@
-Subproject commit 11e76be7057c8b189a593ca328aa871fe61fc699
+Subproject commit 1cc5641ba765dcb22da32c66faf3a09f808bfb27

src/CardinalPlugin.cpp

@@ -76,6 +76,7 @@ static const constexpr uint kCardinalStateCount = kCardinalStateBaseCount;
 namespace rack {
 namespace asset {
 std::string patchesPath();
+void destroy();
 }
 namespace engine {
 void Engine_setAboutToClose(Engine*);
@@ -290,6 +291,9 @@ struct Initializer
         INFO("Destroying plugins");
         plugin::destroyStaticPlugins();
 
+        INFO("Destroying colourized assets");
+        asset::destroy();
+
         INFO("Destroying settings");
         settings::destroy();
 

src/custom/dep.cpp

@@ -775,7 +775,7 @@ void nsvgDeleteCardinal(NSVGimage*);
 }
 
 struct ExtendedNSVGimage {
-    NSVGimage* handle;
+    NSVGimage* const handle;
     NSVGimage* handleOrig;
     NSVGimage* handleMOD;
     NSVGshape* shapesOrig;
@@ -1088,3 +1088,26 @@ void switchDarkMode(const bool darkMode)
             std::memcpy(ext.handle, !darkMode ? ext.handleMOD : ext.handleOrig, sizeof(NSVGimage));
     }
 }
+
+namespace rack {
+namespace asset {
+
+void destroy() {
+    for (auto it = loadedDarkSVGs.begin(), end = loadedDarkSVGs.end(); it != end; ++it)
+    {
+        ExtendedNSVGimage& ext(*it);
+        deleteExtendedNSVGimage(ext);
+    }
+
+    for (auto it = loadedLightSVGs.begin(), end = loadedLightSVGs.end(); it != end; ++it)
+    {
+        ExtendedNSVGimage& ext(*it);
+        deleteExtendedNSVGimage(ext);
+    }
+
+    loadedDarkSVGs.clear();
+    loadedLightSVGs.clear();
+}
+
+}
+}