gpu: rename native -> NativeInstance

Signed-off-by: Stephen Gutekanst <stephen@hexops.com>

gpu/src/NativeInstance.zig

@@ -2,12 +2,18 @@
 const c = @import("c.zig").c;
 const Interface = @import("Interface.zig");
 
-/// Returns a native webgpu.h implementation of the gpu.Interface, wrapping the given WGPUInstance.
-pub fn native(instance: c.WGPUInstance) Interface {
-    // TODO: implement Interface
-    _ = instance;
+const NativeInstance = @This();
+
+/// The WGPUInstance that is wrapped by this native instance.
+instance: c.WGPUInstance,
+
+/// Returns the gpu.Interface for interacting with this native instance.
+pub fn interface(native: NativeInstance) Interface {
+    _ = native;
     @panic("not implemented");
 
+    // TODO: implement Interface
+
     // TODO: implement Device interface
 
     // TODO: implement Adapter interface:
@@ -18,3 +24,8 @@ pub fn native(instance: c.WGPUInstance) Interface {
     // WGPU_EXPORT bool wgpuAdapterGetLimits(WGPUAdapter adapter, WGPUSupportedLimits * limits);
     // WGPU_EXPORT void wgpuAdapterGetProperties(WGPUAdapter adapter, WGPUAdapterProperties * properties);
 }
+
+/// Wraps a native WGPUInstance to provide an implementation of the gpu.Interface.
+pub fn wrap(instance: c.WGPUInstance) NativeInstance {
+    return .{ .instance = instance };
+}

gpu/src/main.zig

@@ -17,7 +17,7 @@
 //! 
 const std = @import("std");
 const Interface = @import("Interface.zig");
-const native = @import("native.zig").native;
+const NativeInstance = @import("NativeInstance.zig");
 
 const Adapter = @import("Adapter.zig");
 const Device = @import("Device.zig");
@@ -26,10 +26,12 @@ const FeatureName = @import("feature_name.zig").FeatureName;
 const SupportedLimits = @import("supported_limits.zig").SupportedLimits;
 
 test "syntax" {
+    _ = Interface;
+    _ = NativeInstance;
+
     _ = Adapter;
     _ = Device;
-    _ = Interface;
-    _ = native;
+
     _ = FeatureName;
     _ = SupportedLimits;
 }