Custom puglSetWindowSize on macOS, needed for reaper

dgl/src/pugl.cpp

@@ -302,9 +302,30 @@ PuglStatus puglSetWindowSize(PuglView* const view, const uint width, const uint
     view->defaultHeight = height;
 
 #if defined(DISTRHO_OS_HAIKU) || defined(DISTRHO_OS_MAC)
-    // keep upstream behaviour
+    // replace the 2 views setFrame with setFrameSize
     const PuglRect frame = { view->frame.x, view->frame.y, (double)width, (double)height };
-    return puglSetFrame(view, frame);
+    PuglInternals* const impl = view->impl;
+
+    // Update view frame to exactly the requested frame in Pugl coordinates
+    view->frame = frame;
+
+    const NSRect framePx = rectToNsRect(frame);
+    const NSRect framePt = nsRectToPoints(view, framePx);
+    if (impl->window)
+    {
+        // Resize window to fit new content rect
+        const NSRect screenPt = rectToScreen(viewScreen(view), framePt);
+        const NSRect winFrame = [impl->window frameRectForContentRect:screenPt];
+
+        [impl->window setFrame:winFrame display:NO];
+    }
+
+    // Resize views
+    const NSSize sizePx = NSMakeSize(frame.width, frame.height);
+    const NSSize sizePt = [impl->drawView convertSizeFromBacking:sizePx];
+
+    [impl->wrapperView setFrameSize:(impl->window ? sizePt : framePt.size)];
+    [impl->drawView setFrameSize:sizePt];
 #elif defined(DISTRHO_OS_WINDOWS)
     // matches upstream pugl, except we add SWP_NOMOVE flag
     if (view->impl->hwnd)