1 files changed, 55 insertions, 0 deletions
diff --git a/video/out/mac/metal_layer.swift b/video/out/mac/metal_layer.swift
new file mode 100644
index 0000000000..7fc419af4b
--- /dev/null
+++ b/video/out/mac/metal_layer.swift
@@ -0,0 +1,55 @@
+/*
+ * This file is part of mpv.
+ *
+ * mpv is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * mpv is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with mpv.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+import Cocoa
+import QuartzCore
+
+class MetalLayer: CAMetalLayer {
+    unowned var common: MacCommon
+
+    // workaround for a MoltenVK workaround that sets the drawableSize to 1x1 to forcefully complete
+    // the presentation, this causes flicker and the drawableSize possibly staying at 1x1
+    override var drawableSize: CGSize {
+        get { return super.drawableSize }
+        set {
+            if Int(newValue.width) > 1 && Int(newValue.height) > 1 {
+                super.drawableSize = newValue
+            }
+        }
+    }
+
+    init(common com: MacCommon) {
+        common = com
+        super.init()
+
+        pixelFormat = .rgba16Float
+        backgroundColor = NSColor.black.cgColor
+    }
+
+    // necessary for when the layer containing window changes the screen
+    override init(layer: Any) {
+        guard let oldLayer = layer as? MetalLayer else {
+            fatalError("init(layer: Any) passed an invalid layer")
+        }
+        common = oldLayer.common
+        super.init()
+    }
+
+    required init?(coder: NSCoder) {
+        fatalError("init(coder:) has not been implemented")
+    }
+}