metal surface creation

rendering_api/metal/src/core/surface/metal_surface.h

@@ -0,0 +1,5 @@
+#pragma once
+#include "core/window_surface/gryphn_surface.h"
+
+typedef struct gnPlatformWindowSurface_t{
+} gnPlatformWindowSurface;

rendering_api/metal/src/core/surface/metal_surface.m

@@ -0,0 +1,23 @@
+#include "metal_surface.h"
+#include "core/window_surface/gryphn_surface_create_functions.h"
+
+#import <AppKit/AppKit.h>
+#import <Cocoa/Cocoa.h>
+#import <QuartzCore/CAMetalLayer.h>
+#import <QuartzCore/QuartzCore.h>
+#import <Metal/Metal.h>
+
+gnReturnCode gnCreateMacOSWindowSurfaceFn(struct gnWindowSurface_t* windowSurface, gnInstance* instance, struct gnMacOSWindowSurfaceInfo_t createInfo) {
+    NSWindow* window = (__bridge NSWindow*)createInfo.window;
+    NSView* view = [window contentView];
+
+    CAMetalLayer* layer = [CAMetalLayer layer];
+    [layer setContentsScale:[window backingScaleFactor]];
+    [layer setFramebufferOnly:YES];
+
+    [view setLayer:layer];
+    [view setWantsLayer:YES];
+
+    windowSurface->windowSurface = malloc(sizeof(gnPlatformWindowSurface));
+    return GN_SUCCESS;
+}