create and present drawable

src/Cafe/HW/Latte/Renderer/Vulkan/CocoaSurface.mm

@@ -1,36 +1,7 @@
 #include "Cafe/HW/Latte/Renderer/Vulkan/CocoaSurface.h"
 #include "Cafe/HW/Latte/Renderer/Vulkan/VulkanAPI.h"
 
-#import <Cocoa/Cocoa.h>
-#import <QuartzCore/CAMetalLayer.h>
-
-@interface MetalView : NSView
-@end
-
-@implementation MetalView
-
--(BOOL) wantsUpdateLayer { return YES; }
-
-+(Class) layerClass { return [CAMetalLayer class]; }
-
-// copied from https://github.com/KhronosGroup/MoltenVK/blob/master/Demos/Cube/macOS/DemoViewController.m
-
--(CALayer*) makeBackingLayer
-{
-	CALayer* layer = [self.class.layerClass layer];
-	CGSize viewScale = [self convertSizeToBacking: CGSizeMake(1.0, 1.0)];
-	layer.contentsScale = MIN(viewScale.width, viewScale.height);
-	return layer;
-}
-
--(BOOL) layer: (CALayer *)layer shouldInheritContentsScale: (CGFloat)newScale fromWindow: (NSWindow *)window
-{
-	if (newScale == layer.contentsScale) { return NO; }
-
-	layer.contentsScale = newScale;
-	return YES;
-}
-@end
+#include "Cafe/HW/Latte/Renderer/MetalView.h"
 
 VkSurfaceKHR CreateCocoaSurface(VkInstance instance, void* handle)
 {