Fix iOS pluginmode bug

Author: timothyschoen

Source/Canvas.cpp

@@ -633,6 +633,7 @@ void Canvas::performRender(NVGcontext* nvg, Rectangle<int> invalidRegion)
             }
         }
     }
+    
     currentRenderArea = invalidRegion;
 
     auto drawBorder = [this, nvg, zoom](bool const bg, bool const fg) {
@@ -802,6 +803,11 @@ void Canvas::performRender(NVGcontext* nvg, Rectangle<int> invalidRegion)
     if (objectsDistributeResizer)
         objectsDistributeResizer->render(nvg);
 
+    nvgBeginPath(nvg);
+    nvgRect(nvg, invalidRegion.getX(), invalidRegion.getY(), invalidRegion.getWidth(), invalidRegion.getHeight());
+    nvgFillColor(nvg, nvgRGBA(rand() & 255, rand() & 255, rand() & 255, 40));
+    nvgFill(nvg);
+    
     nvgRestore(nvg);
 
     // Draw scrollbars
@@ -815,9 +821,9 @@ void Canvas::renderAllObjects(NVGcontext* nvg, Rectangle<int> const area)
     for (auto* obj : objects) {
         {
             auto b = obj->getBounds();
-            NVGScopedState scopedState(nvg);
-            nvgTranslate(nvg, b.getX(), b.getY());
             if (b.intersects(area) && obj->isVisible()) {
+                NVGScopedState scopedState(nvg);
+                nvgTranslate(nvg, b.getX(), b.getY());
                 obj->render(nvg);
             }
         }

Source/PluginMode.h

@@ -189,13 +189,11 @@ class PluginMode final : public Component
 #endif
             nvgScissor(nvg, (getWidth() - (width * scale)) / 2, (getHeight() - (height * scale)) / 2, width * scale, height * scale);
 
+        nvgTranslate(nvg, 0, (isWindowFullscreen() ? 0 : -titlebarHeight));
         nvgScale(nvg, scale, scale);
-        nvgTranslate(nvg, cnv->getX(), cnv->getY() - (isWindowFullscreen() ? 0 : 40) / scale);
+        nvgTranslate(nvg, cnv->getX(), cnv->getY());
 
-        area /= scale;
-        area = area.translated(cnv->canvasOrigin.x, cnv->canvasOrigin.y);
-        
-        cnv->performRender(nvg, area);
+        cnv->performRender(nvg, cnv->getLocalArea(this, area.translated(0, 40)));
     }
 
     void closePluginMode()