renderer/metal: load shaders from precompiled lib

pkg/macos/dispatch.zig

@@ -0,0 +1,8 @@
+pub const c = @import("dispatch/c.zig");
+pub const data = @import("dispatch/data.zig");
+pub const queue = @import("dispatch/queue.zig");
+pub const Data = data.Data;
+
+test {
+    @import("std").testing.refAllDecls(@This());
+}

pkg/macos/dispatch/c.zig

@@ -0,0 +1,3 @@
+pub usingnamespace @cImport({
+    @cInclude("dispatch/dispatch.h");
+});

pkg/macos/dispatch/data.zig

@@ -0,0 +1,31 @@
+const std = @import("std");
+const foundation = @import("../foundation.zig");
+const c = @import("c.zig");
+
+pub const Data = opaque {
+    pub const DESTRUCTOR_DEFAULT = c.DISPATCH_DATA_DESTRUCTOR_DEFAULT;
+
+    pub fn create(
+        data: []const u8,
+        queue: ?*anyopaque,
+        destructor: ?*anyopaque,
+    ) !*Data {
+        return dispatch_data_create(
+            data.ptr,
+            data.len,
+            queue,
+            destructor,
+        ) orelse return error.OutOfMemory;
+    }
+
+    pub fn release(data: *Data) void {
+        foundation.c.CFRelease(data);
+    }
+};
+
+extern "c" fn dispatch_data_create(
+    data: [*]const u8,
+    len: usize,
+    queue: ?*anyopaque,
+    destructor: ?*anyopaque,
+) ?*Data;

pkg/macos/dispatch/queue.zig

@@ -0,0 +1,8 @@
+const std = @import("std");
+const c = @import("c.zig");
+
+pub const Queue = *anyopaque; // dispatch_queue_t
+
+pub fn getMain() Queue {
+    return c.dispatch_get_main_queue().?;
+}

pkg/macos/main.zig

@@ -1,5 +1,6 @@
 pub const foundation = @import("foundation.zig");
 pub const animation = @import("animation.zig");
+pub const dispatch = @import("dispatch.zig");
 pub const graphics = @import("graphics.zig");
 pub const os = @import("os.zig");
 pub const text = @import("text.zig");

src/renderer/metal/shaders.zig

@@ -156,27 +156,29 @@ pub const PostUniforms = extern struct {
 
 /// Initialize the MTLLibrary. A MTLLibrary is a collection of shaders.
 fn initLibrary(device: objc.Object) !objc.Object {
-    // Hardcoded since this file isn't meant to be reusable.
-    const data = @embedFile("../shaders/cell.metal");
-    const source = try macos.foundation.String.createWithBytes(
-        data,
-        .utf8,
-        false,
+    const start = try std.time.Instant.now();
+
+    const data = try macos.dispatch.Data.create(
+        @embedFile("../shaders/Ghostty.metallib"),
+        macos.dispatch.queue.getMain(),
+        macos.dispatch.Data.DESTRUCTOR_DEFAULT,
     );
-    defer source.release();
+    defer data.release();
 
     var err: ?*anyopaque = null;
     const library = device.msgSend(
         objc.Object,
-        objc.sel("newLibraryWithSource:options:error:"),
+        objc.sel("newLibraryWithData:error:"),
         .{
-            source,
-            @as(?*anyopaque, null),
+            data,
             &err,
         },
     );
     try checkError(err);
 
+    const end = try std.time.Instant.now();
+    log.debug("shader library loaded time={}us", .{end.since(start) / std.time.ns_per_us});
+
     return library;
 }