From 549666c1b5e30927c0bc1bcf9d97d6b9af0cd4e9 Mon Sep 17 00:00:00 2001
From: Jim Van Verth <jvanverth@google.com>
Date: Mon, 21 Oct 2019 11:45:06 -0400
Subject: [PATCH] Metal: adjust framebuffer size by contentsScale.

If the layer has a scale factor we need to allocate a larger framebuffer.
Otherwise we'll end up drawing to a fraction of the window.

Bug: skia:9554
Change-Id: I93d1e0dc7172ed10bb99ce45524561ad841f0101
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/249803
Reviewed-by: Hal Canary <halcanary@google.com>
Commit-Queue: Jim Van Verth <jvanverth@google.com>
---
 src/image/SkSurface_GpuMtl.mm | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/image/SkSurface_GpuMtl.mm b/src/image/SkSurface_GpuMtl.mm
index 5140a7c004..a089e173d6 100644
--- a/src/image/SkSurface_GpuMtl.mm
+++ b/src/image/SkSurface_GpuMtl.mm
@@ -48,8 +48,8 @@ sk_sp<SkSurface> SkSurface::MakeFromCAMetalLayer(GrContext* context,
     }
 
     GrSurfaceDesc desc;
-    desc.fWidth = metalLayer.frame.size.width;
-    desc.fHeight = metalLayer.frame.size.height;
+    desc.fWidth = metalLayer.drawableSize.width * metalLayer.contentsScale;
+    desc.fHeight = metalLayer.drawableSize.height * metalLayer.contentsScale;
     desc.fConfig = config;
 
     sk_sp<GrRenderTargetProxy> proxy = proxyProvider->createLazyRenderTargetProxy(