From 07c3f2e8f82c55ed191f72fa5e9f3935b1913f98 Mon Sep 17 00:00:00 2001
From: Nathan Reiner <nathan@nathanreiner.xyz>
Date: Fri, 22 Aug 2025 20:52:30 +0200
Subject: add first sketch of wl.compositor

---
 src/main.zig           | 11 ++++++++--
 src/wl/compositor.zig  | 54 ++++++++++++++++++++++++++++++++++++++++++++++++++
 src/wl/output/root.zig | 28 ++++++++++----------------
 src/wl/root.zig        |  1 +
 4 files changed, 74 insertions(+), 20 deletions(-)
 create mode 100644 src/wl/compositor.zig

(limited to 'src')

diff --git a/src/main.zig b/src/main.zig
index a9a5ef6..db68ee3 100644
--- a/src/main.zig
+++ b/src/main.zig
@@ -8,12 +8,19 @@ pub fn main() !void {
 
     var display: wl.Display = try .open_default(allocator);
     defer display.deinit(allocator);
-    try display.init(allocator, &.{wl.Output.handler});
+    try display.init(allocator, &.{
+        wl.Output.handler,
+        wl.Compositor.handler,
+    });
 
     try display.roundtrip(allocator);
     try display.roundtrip(allocator);
 
-    for (wl.Output.all()) |output| {
+    for (wl.Output.instances.items) |output| {
         std.debug.print("{}\n", .{output});
     }
+
+    for (wl.Compositor.instances.items) |compositor| {
+        std.debug.print("{}\n", .{compositor});
+    }
 }
diff --git a/src/wl/compositor.zig b/src/wl/compositor.zig
new file mode 100644
index 0000000..6951446
--- /dev/null
+++ b/src/wl/compositor.zig
@@ -0,0 +1,54 @@
+const std = @import("std");
+const wayland = @import("../root.zig");
+const wl = wayland.wl;
+
+const Self = @This();
+
+pub const Events = wayland.EventSet(Self, .{});
+pub const Requests = union(enum) {
+    create_surface: struct { wayland.Object.Ref },
+    create_region: struct { wayland.Object.Ref },
+};
+
+handle: wayland.Object.Ref,
+
+pub var instances: std.ArrayListUnmanaged(*Self) = .empty;
+
+pub const handler: wl.Registry.GlobalHandler = .{
+    .interface = "wl_compositor",
+    .version = 6,
+    .handler = register,
+};
+
+pub fn init(
+    self: *Self,
+    ctx: *wayland.Context
+) !void {
+    self.* = .{
+        .handle = try ctx.display.registry.add_object(
+            ctx.allocator,
+            wayland.Object.from_self(self),
+        ),
+    };
+}
+
+fn register(ctx: *wayland.Context) ?wayland.Object.Ref {
+    const compositor = ctx.allocator.create(Self) catch return null;
+    compositor.init(ctx) catch return null;
+
+    instances.append(ctx.allocator, compositor) catch return null;
+    return compositor.handle;
+}
+
+pub fn format(
+    self: *const Self,
+    comptime fmt: []const u8,
+    options: std.fmt.FormatOptions,
+    writer: anytype,
+) !void {
+    _ = self;
+    _ = fmt;
+    _ = options;
+
+    try writer.print("wl.compositor", .{});
+}
diff --git a/src/wl/output/root.zig b/src/wl/output/root.zig
index fca2ecc..ce2169f 100644
--- a/src/wl/output/root.zig
+++ b/src/wl/output/root.zig
@@ -30,7 +30,7 @@ pub const Info = struct {
     description: []const u8,
 };
 
-var outputs: std.ArrayListUnmanaged(*Self) = .empty;
+pub var instances: std.ArrayListUnmanaged(*Self) = .empty;
 
 staging: Info = undefined,
 info: ?Info = null,
@@ -38,12 +38,11 @@ handle: wayland.Object.Ref,
 
 pub fn init(
     self: *Self,
-    allocator: std.mem.Allocator,
-    display: *wl.Display,
+    ctx: *wayland.Context,
 ) !void {
     self.* = .{
-        .handle = try display.registry.add_object(
-            allocator,
+        .handle = try ctx.display.registry.add_object(
+            ctx.allocator,
             wayland.Object.from_self(self),
         ),
     };
@@ -59,10 +58,11 @@ pub const handler: wl.Registry.GlobalHandler = .{
     .handler = register,
 };
 
-pub fn register(ctx: *wayland.Context) ?wayland.Object.Ref {
+fn register(ctx: *wayland.Context) ?wayland.Object.Ref {
     const output = ctx.allocator.create(Self) catch return null;
-    output.init(ctx.allocator, ctx.display) catch return null;
-    outputs.append(ctx.allocator, output) catch return null;
+    output.init(ctx) catch return null;
+
+    instances.append(ctx.allocator, output) catch return null;
     return output.handle;
 }
 
@@ -132,14 +132,6 @@ fn description(self: *Self, ctx: *wayland.Context, d: []const u8) !void {
     @memcpy(@constCast(self.staging.description), d);
 }
 
-pub fn get(index: usize) *Self {
-    return outputs.items[index];
-}
-
-pub fn all() []*Self {
-    return outputs.items;
-}
-
 pub fn format(
     self: *const Self,
     comptime fmt: []const u8,
@@ -149,8 +141,8 @@ pub fn format(
     _ = fmt;
     _ = options;
     if (self.info) |info| {
-        try writer.print("output({s}) [ {} ]", .{ info.name, info.mode});
+        try writer.print("wl.output({s}) [ {} ]", .{ info.name, info.mode});
     } else {
-        try writer.print("output(?)", .{});
+        try writer.print("wl.output(?)", .{});
     }
 }
diff --git a/src/wl/root.zig b/src/wl/root.zig
index 778b085..d08c19b 100644
--- a/src/wl/root.zig
+++ b/src/wl/root.zig
@@ -2,3 +2,4 @@ pub const Display = @import("display.zig");
 pub const Registry = @import("registry.zig");
 pub const Callback = @import("callback.zig");
 pub const Output = @import("output/root.zig");
+pub const Compositor = @import("compositor.zig");
-- 
cgit v1.2.3-70-g09d2