gpu: make Buffer an enum with methods

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

gpu/src/Buffer.zig

@@ -1,47 +1,51 @@
 const std = @import("std");
 
-ptr: *anyopaque,
+pub const Buffer = enum(usize) {
+    _,
 
-pub const BindingType = enum(u32) {
+    pub const none: Buffer = @intToEnum(Buffer, 0);
-    undef = 0x00000000,
+
-    uniform = 0x00000001,
+    pub const BindingType = enum(u32) {
-    storage = 0x00000002,
+        undef = 0x00000000,
-    read_only_storage = 0x00000003,
+        uniform = 0x00000001,
-};
+        storage = 0x00000002,
-
+        read_only_storage = 0x00000003,
-pub const MapAsyncStatus = enum(u32) {
+    };
-    success = 0x00000000,
+
-    err = 0x00000001,
+    pub const MapAsyncStatus = enum(u32) {
-    unknown = 0x00000002,
+        success = 0x00000000,
-    device_lost = 0x00000003,
+        err = 0x00000001,
-    destroyed_before_callback = 0x00000004,
+        unknown = 0x00000002,
-    unmapped_before_callback = 0x00000005,
+        device_lost = 0x00000003,
-};
+        destroyed_before_callback = 0x00000004,
-
+        unmapped_before_callback = 0x00000005,
-pub const Usage = packed struct {
+    };
-    map_read: bool = false,
+
-    map_write: bool = false,
+    pub const Usage = packed struct {
-    copy_src: bool = false,
+        map_read: bool = false,
-    copy_dst: bool = false,
+        map_write: bool = false,
-    index: bool = false,
+        copy_src: bool = false,
-    vertex: bool = false,
+        copy_dst: bool = false,
-    uniform: bool = false,
+        index: bool = false,
-    storage: bool = false,
+        vertex: bool = false,
-    indirect: bool = false,
+        uniform: bool = false,
-    query_resolve: bool = false,
+        storage: bool = false,
-
+        indirect: bool = false,
-    _padding: u22 = 0,
+        query_resolve: bool = false,
-
+
-    comptime {
+        _padding: u22 = 0,
-        std.debug.assert(
+
-            @sizeOf(@This()) == @sizeOf(u32) and
+        comptime {
-                @bitSizeOf(@This()) == @bitSizeOf(u32),
+            std.debug.assert(
-        );
+                @sizeOf(@This()) == @sizeOf(u32) and
-    }
+                    @bitSizeOf(@This()) == @bitSizeOf(u32),
-
+            );
-    pub const none = Usage{};
+        }
-
+
-    pub fn equal(a: Usage, b: Usage) bool {
+        pub const none = Usage{};
-        return @truncate(u10, @bitCast(u32, a)) == @truncate(u10, @bitCast(u32, b));
+
-    }
+        pub fn equal(a: Usage, b: Usage) bool {
+            return @truncate(u10, @bitCast(u32, a)) == @truncate(u10, @bitCast(u32, b));
+        }
+    };
 };

gpu/src/main.zig

@@ -12,7 +12,7 @@ pub const whole_size = 0xffffffffffffffff;
 pub const Adapter = @import("Adapter.zig");
 pub const BindGroup = @import("BindGroup.zig");
 pub const BindGroupLayout = @import("BindGroupLayout.zig");
-pub const Buffer = @import("Buffer.zig");
+pub const Buffer = @import("buffer.zig").Buffer;
 pub const CommandBuffer = @import("CommandBuffer.zig");
 pub const CommandEncoder = @import("CommandEncoder.zig");
 pub const ComputePassEncoder = @import("ComputePassEncoder.zig");
@@ -40,7 +40,7 @@ test {
     refAllDecls(@import("Adapter.zig"));
     refAllDecls(@import("BindGroup.zig"));
     refAllDecls(@import("BindGroupLayout.zig"));
-    refAllDecls(@import("Buffer.zig"));
+    refAllDecls(@import("buffer.zig"));
     refAllDecls(@import("CommandBuffer.zig"));
     refAllDecls(@import("CommandEncoder.zig"));
     refAllDecls(@import("ComputePassEncoder.zig"));