gpu: make Adapter an enum with methods

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

gpu/src/Adapter.zig

@@ -1,36 +0,0 @@
-const testing = @import("std").testing;
-const ChainedStructOut = @import("types.zig").ChainedStructOut;
-
-ptr: *anyopaque,
-
-pub const Type = enum(u32) {
-    discrete_gpu,
-    integrated_gpu,
-    cpu,
-    unknown,
-
-    pub fn name(t: Type) []const u8 {
-        return switch (t) {
-            .discrete_gpu => "Discrete GPU",
-            .integrated_gpu => "Integrated GPU",
-            .cpu => "CPU",
-            .unknown => "Unknown",
-        };
-    }
-};
-
-pub const Properties = extern struct {
-    next_in_chain: *ChainedStructOut,
-    vendor_id: u32,
-    vendor_name: [*:0]const u8,
-    architecture: [*:0]const u8,
-    device_id: u32,
-    name: [*:0]const u8,
-    driver_description: [*:0]const u8,
-    adapter_type: Type,
-    backend_type: Type,
-};
-
-test "Adapter.Type name" {
-    try testing.expectEqualStrings("Discrete GPU", Type.discrete_gpu.name());
-}

gpu/src/adapter.zig

@@ -0,0 +1,40 @@
+const testing = @import("std").testing;
+const ChainedStructOut = @import("types.zig").ChainedStructOut;
+
+pub const Adapter = enum(usize) {
+    _,
+
+    pub const none: Adapter = @intToEnum(Adapter, 0);
+
+    pub const Type = enum(u32) {
+        discrete_gpu,
+        integrated_gpu,
+        cpu,
+        unknown,
+
+        pub fn name(t: Type) []const u8 {
+            return switch (t) {
+                .discrete_gpu => "Discrete GPU",
+                .integrated_gpu => "Integrated GPU",
+                .cpu => "CPU",
+                .unknown => "Unknown",
+            };
+        }
+    };
+
+    pub const Properties = extern struct {
+        next_in_chain: *ChainedStructOut,
+        vendor_id: u32,
+        vendor_name: [*:0]const u8,
+        architecture: [*:0]const u8,
+        device_id: u32,
+        name: [*:0]const u8,
+        driver_description: [*:0]const u8,
+        adapter_type: Type,
+        backend_type: Type,
+    };
+};
+
+test "Adapter.Type name" {
+    try testing.expectEqualStrings("Discrete GPU", Adapter.Type.discrete_gpu.name());
+}

gpu/src/main.zig

@@ -9,7 +9,7 @@ pub const stride_undefined = 0xffffffff;
 pub const whole_map_size = std.math.maxInt(usize);
 pub const whole_size = 0xffffffffffffffff;
 
-pub const Adapter = @import("Adapter.zig");
+pub const Adapter = @import("adapter.zig").Adapter;
 pub const BindGroup = @import("BindGroup.zig");
 pub const BindGroupLayout = @import("BindGroupLayout.zig");
 pub const Buffer = @import("buffer.zig").Buffer;
@@ -37,7 +37,7 @@ pub const TextureView = @import("TextureView.zig");
 pub const AlphaMode = @import("types.zig").AlphaMode;
 
 test {
-    refAllDecls(@import("Adapter.zig"));
+    refAllDecls(@import("adapter.zig"));
     refAllDecls(@import("BindGroup.zig"));
     refAllDecls(@import("BindGroupLayout.zig"));
     refAllDecls(@import("buffer.zig"));