zgpu

commit c81a9ca715aac3ccdc03f5562aa2c91ae31219eb
parent 506852b0122e929c01834aba8292c16e2f054bfb
Author: Christian Ermann <christianermann@gmail.com>
Date:   Sun, 20 Apr 2025 19:41:13 -0700

Add Instance configuration

Diffstat:
M
src/instance.zig
 | 
49
++++++++++++++++++++++++++++++++++++++++++++++++-
M
src/main.zig
 | 
13
++++++++++++-

2 files changed, 60 insertions(+), 2 deletions(-)
diff --git a/src/instance.zig b/src/instance.zig
@@ -1,5 +1,6 @@
 const c = @cImport({
     @cInclude("webgpu.h");
+    @cInclude("wgpu.h");
 });
 
 const ChainedStruct = @import("common.zig").ChainedStruct;
@@ -7,7 +8,53 @@ const Surface = @import("surface.zig").Surface;
 
 pub const Instance = opaque {
     pub const Descriptor = extern struct {
-        next_in_chain: ?*const ChainedStruct = null,
+        pub const Next = extern union {
+            generic: ?*const ChainedStruct,
+            extras: *const Extras,
+        };
+        next: Next = .{ .generic = null },
+    };
+
+    pub const Extras = extern struct {
+        next: ?*const ChainedStruct = null,
+        backends: Backends,
+        flags: Flags,
+        dx12_compiler: DX12Compiler,
+        gles3_minor_version: GLES3MinorVersion,
+        dxil_path: ?[*:0]const u8,
+        dxc_path: ?[*:0]const u8,
+
+        pub const Backends = enum(u32) {
+            all = 0x00000000,
+            vulkan = 0x00000001,
+            gl = 0x00000002,
+            metal = 0x00000004,
+            dx12 = 0x00000008,
+            dx11 = 0x00000010,
+            browser_webgpu = 0x00000020,
+            primary = 0x0000002D,
+            secondary = 0x00000012,
+        };
+
+        pub const Flags = enum(u32) {
+            default = 0x00000000,
+            debug = 0x00000001,
+            validation = 0x00000002,
+            discard_hal_labels = 0x00000004,
+        };
+
+        pub const DX12Compiler = enum(u32) {
+            undefined = 0x00000000,
+            fxc = 0x00000001,
+            dxc = 0x00000002,
+        };
+
+        pub const GLES3MinorVersion = enum(u32) {
+            automatic = 0x00000000,
+            version0 = 0x00000001,
+            version1 = 0x00000002,
+            version2 = 0x00000003,
+        };
     };
 
     pub fn create(descriptor: ?*const Descriptor) ?*Instance {
diff --git a/src/main.zig b/src/main.zig
@@ -13,7 +13,18 @@ pub fn main() !void {
     const display = try glfw.native.getX11Display();
     const window_id = try glfw.native.getX11Window(window);
 
-    const instance = Instance.create(null) orelse {
+    const instance = Instance.create(&.{
+        .next = .{
+            .extras = &.{
+                .backends = .primary,
+                .flags = .default,
+                .dx12_compiler = .undefined,
+                .gles3_minor_version = .automatic,
+                .dxil_path = null,
+                .dxc_path = null,
+            },
+        },
+    }) orelse {
         std.log.err("failed to create GPU instance", .{});
         std.process.exit(1);
     };