From 6485d28b3eb43ac6687cd7faeae9ad74c1a5b00b Mon Sep 17 00:00:00 2001
From: Bouke van der Bijl <i@bou.ke>
Date: Fri, 14 Aug 2026 15:31:09 +0200
Subject: [PATCH] macOS: report the drawable size to the renderer (#4479)

---
 platform/macos/src/MLNMapView+Metal.h  | 2 ++
 platform/macos/src/MLNMapView+Metal.mm | 6 ++++++
 2 files changed, 8 insertions(+)

diff --git a/platform/macos/src/MLNMapView+Metal.h b/platform/macos/src/MLNMapView+Metal.h
index d24778f98..b2ea4995b 100644
--- a/platform/macos/src/MLNMapView+Metal.h
+++ b/platform/macos/src/MLNMapView+Metal.h
@@ -39,6 +39,8 @@ public:
   MLNBackendResource* getObject() override;
   void display() override;
 
+  void drawableSizeChanged(CGSize size);
+
 private:
   bool presentsWithTransaction = true;
 };
diff --git a/platform/macos/src/MLNMapView+Metal.mm b/platform/macos/src/MLNMapView+Metal.mm
index bc4f9c42c..126cc1482 100644
--- a/platform/macos/src/MLNMapView+Metal.mm
+++ b/platform/macos/src/MLNMapView+Metal.mm
@@ -25,6 +25,7 @@
 }
 
 - (void)mtkView:(MTKView*)view drawableSizeWillChange:(CGSize)size {
+  _impl->drawableSizeChanged(size);
 }
 
 - (void)drawInMTKView:(MTKView*)view {
@@ -134,6 +135,11 @@ MLNMapViewMetalImpl::MLNMapViewMetalImpl(MLNMapView* nativeView_)
   resource.presentsWithTransaction = presentsWithTransaction;
 
   [mapView addSubview:resource.mtlView positioned:NSWindowBelow relativeTo:nil];
+  drawableSizeChanged(resource.mtlView.drawableSize);
+}
+
+void MLNMapViewMetalImpl::drawableSizeChanged(CGSize drawableSize) {
+  size = {static_cast<uint32_t>(drawableSize.width), static_cast<uint32_t>(drawableSize.height)};
 }
 
 MLNMapViewMetalImpl::~MLNMapViewMetalImpl() = default;