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seizer-rummy
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base: StreetLight:32f8b667618f9c014e29710be56a54541d007e8d
Branches Tags
StreetLight:multiplayer
StreetLight:dev
..
compare: StreetLight:cb62ac2f63d91b2473cda081d262884b98573725
Branches Tags
StreetLight:multiplayer
StreetLight:dev

3 Commits
32f8b66761 ... cb62ac2f63

Author SHA1 Message Date
LeRoyce Pearson cb62ac2f63 start implementing mDNS discovery on client side 2024-03-03 02:21:30 -07:00
LeRoyce Pearson a6fe88b65e start implementing mDNS service discovery for multiplayer 2024-03-03 00:45:06 -07:00
LeRoyce Pearson 0ab23322ea further refine element tree 2024-03-01 17:30:37 -07:00
12 changed files with 865 additions and 275 deletions
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12
build.zig
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@ -20,6 +20,16 @@ pub fn build(b: *std.Build) void {
.optimize = optimize,
});
const mdns = b.dependency("mdns", .{
.target = target,
.optimize = optimize,
});
const enet = b.dependency("enet", .{
.target = target,
.optimize = optimize,
});
const exe = b.addExecutable(.{
.name = "seizer-rummy",
.root_source_file = .{ .path = "src/main.zig" },
@ -27,6 +37,8 @@ pub fn build(b: *std.Build) void {
.optimize = optimize,
});
exe.root_module.addImport("seizer", seizer.module("seizer"));
exe.linkLibrary(mdns.artifact("mdns"));
exe.linkLibrary(enet.artifact("enet"));
b.installArtifact(exe);
const run_cmd = b.addRunArtifact(exe);

8
build.zig.zon
View File

@ -19,6 +19,14 @@
.url = "https://github.com/leroycep/seizer/archive/8fdc6335641614c1cd844d1ecd5ad937584a443e.tar.gz",
.hash = "1220b6f9d0aba788b55a3e26a34ca9793495fbdb062c463cef1433ff937b96aa77d6",
},
.mdns = .{
.url = "https://github.com/leroycep/mdns/archive/ab55ee5a1e3f72d872521b89fd28a771a1271e2e.tar.gz",
.hash = "12209523b5d87d2cb4168950c68e7a8f14b1c74001b6d9a79d35286f3631ef5ea210",
},
.enet = .{
.url = "https://github.com/leroycep/enet/archive/624ca683074acead6f96785d9133e074aae59574.tar.gz",
.hash = "1220f45c8055a48c87a17b16adb28531072ebf336756b8847d489076ffb55b08e3f0",
},
},
.paths = .{
// This makes *all* files, recursively, included in this package. It is generally

18
src/Element.zig
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@ -19,26 +19,26 @@ pub const Interface = struct {
destroy: *const fn (?*anyopaque) void,
minimum_size: *const fn (?*anyopaque, RenderResources) [2]f32,
render: *const fn (?*anyopaque, *seizer.Canvas, RenderResources, [2]f32, [2]f32) void,
get_actions: *const fn (?*anyopaque, *std.ArrayList(Action), RenderResources, [2]f32, [2]f32) Error!void,
event: *const fn (?*anyopaque, Event) ?Command,
};
pub const RenderResources = struct {
hovered: ?Element.Command,
hovered: bool,
deck: DeckSprites,
font: seizer.Canvas.Font,
};
pub const Action = struct {
center: [2]f32,
command: Command,
pub const Event = union(enum) {
up,
right,
down,
left,
activate,
};
pub const Command = union(enum) {
none,
goto_reference: protocol.Reference,
callback: struct {
pointer: ?*anyopaque,
function: *const fn (?*anyopaque) void,
},
};
const DeckSprites = assets.DeckSprites;

59
src/Element/HBox.zig
View File

@ -1,5 +1,6 @@
allocator: std.mem.Allocator,
children: std.ArrayListUnmanaged(Element),
hovered: usize,
pub fn create(allocator: std.mem.Allocator) !*@This() {
const this = try allocator.create(@This());
@ -7,6 +8,7 @@ pub fn create(allocator: std.mem.Allocator) !*@This() {
this.* = .{
.allocator = allocator,
.children = .{},
.hovered = 0,
};
return this;
}
@ -22,7 +24,7 @@ pub fn element(this: *@This()) Element {
.destroy = &element_destroy,
.minimum_size = &element_minimum_size,
.render = &element_render,
.get_actions = &element_get_actions,
.event = &element_event,
},
};
}
@ -76,50 +78,45 @@ pub fn element_render(pointer: ?*anyopaque, canvas: *seizer.Canvas, render_resou
const space_around = empty_space / @as(f32, @floatFromInt(num_spaces));
var x: f32 = min[0] + @max(space_around, 0);
for (this.children.items) |child| {
for (this.children.items, 0..) |child, child_index| {
const child_size = child.interface.minimum_size(child.pointer, render_resources);
const child_min = [2]f32{ x, min[1] };
const child_max = [2]f32{ x + child_size[0], max[1] };
child.interface.render(child.pointer, canvas, render_resources, child_min, child_max);
var child_render_resources = render_resources;
child_render_resources.hovered = render_resources.hovered and child_index == this.hovered;
child.interface.render(child.pointer, canvas, child_render_resources, child_min, child_max);
x += child_size[0] + space_around;
}
}
pub fn element_get_actions(pointer: ?*anyopaque, actions: *std.ArrayList(Element.Action), render_resources: Element.RenderResources, min: [2]f32, max: [2]f32) Element.Error!void {
pub fn element_activate(pointer: ?*anyopaque) ?Element.Command {
const this: *@This() = @ptrCast(@alignCast(pointer));
if (this.children.items.len == 0) return;
if (this.hovered >= this.children.items.len) return null;
const hovered = this.children.items[this.hovered];
return hovered.interface.activate(hovered.pointer);
}
const parent_size = [2]f32{
max[0] - min[0],
max[1] - min[1],
pub fn element_event(pointer: ?*anyopaque, event: Element.Event) ?Element.Command {
const this: *@This() = @ptrCast(@alignCast(pointer));
if (this.hovered < this.children.items.len) {
const hovered = this.children.items[this.hovered];
if (hovered.interface.event(hovered.pointer, event)) |cmd| {
return cmd;
}
}
const new_hovered: usize = switch (event) {
.right => if (this.hovered < this.children.items.len - 1) this.hovered + 1 else return null,
.left => if (this.hovered > 0) this.hovered - 1 else return null,
else => return null,
};
var filled_space: f32 = 0;
for (this.children.items) |child| {
const child_size = child.interface.minimum_size(child.pointer, render_resources);
filled_space += child_size[0];
}
const empty_space = parent_size[0] - filled_space;
const space_around = empty_space / @as(f32, @floatFromInt((this.children.items.len + 1)));
var x: f32 = min[0] + space_around;
for (this.children.items) |child| {
const child_size = child.interface.minimum_size(child.pointer, render_resources);
const child_min = [2]f32{ x, min[1] };
const child_max = [2]f32{ x + child_size[0], max[1] };
try child.interface.get_actions(child.pointer, actions, render_resources, child_min, child_max);
x += child_size[0] + space_around;
}
this.hovered = new_hovered;
return Element.Command.none;
}
const Element = @import("../Element.zig");

19
src/Element/Link.zig
View File

@ -21,7 +21,7 @@ pub fn element(this: *@This()) Element {
.destroy = &element_destroy,
.minimum_size = &element_minimum_size,
.render = &element_render,
.get_actions = &element_get_actions,
.event = &element_event,
},
};
}
@ -44,7 +44,7 @@ pub fn element_render(pointer: ?*anyopaque, canvas: *seizer.Canvas, render_resou
this.child.interface.render(this.child.pointer, canvas, render_resources, min, max);
// render selection indicator on top if this link is selected
if (render_resources.hovered != null and std.meta.eql(render_resources.hovered.?, Element.Command{ .goto_reference = this.reference })) {
if (render_resources.hovered) {
canvas.rect(
.{ min[0], min[1] },
.{ max[0] - min[0], max[1] - min[1] },
@ -53,18 +53,13 @@ pub fn element_render(pointer: ?*anyopaque, canvas: *seizer.Canvas, render_resou
}
}
pub fn element_get_actions(pointer: ?*anyopaque, actions: *std.ArrayList(Element.Action), render_resources: Element.RenderResources, min: [2]f32, max: [2]f32) Element.Error!void {
pub fn element_event(pointer: ?*anyopaque, event: Element.Event) ?Element.Command {
const this: *@This() = @ptrCast(@alignCast(pointer));
_ = render_resources;
try actions.append(.{
.center = [2]f32{
(min[0] + max[0]) / 2,
(min[1] + max[1]) / 2,
},
.command = .{ .goto_reference = this.reference },
});
switch (event) {
.activate => return Element.Command{ .goto_reference = this.reference },
else => return null,
}
}
const Element = @import("../Element.zig");

82
src/Element/Page.zig
View File

@ -1,5 +1,6 @@
allocator: std.mem.Allocator,
children: std.ArrayListUnmanaged(Child),
hovered: usize,
pub const Child = struct {
/// Where is the child attached on the parent? Imagine it as a pin going through
@ -25,6 +26,7 @@ pub fn create(allocator: std.mem.Allocator) !*@This() {
this.* = .{
.allocator = allocator,
.children = .{},
.hovered = 0,
};
return this;
}
@ -44,7 +46,7 @@ pub fn element(this: *@This()) Element {
.destroy = &element_destroy,
.minimum_size = &element_minimum_size,
.render = &element_render,
.get_actions = &element_get_actions,
.event = &element_event,
},
};
}
@ -82,7 +84,7 @@ pub fn element_render(pointer: ?*anyopaque, canvas: *seizer.Canvas, render_resou
max[1] - min[1],
};
for (this.children.items) |child| {
for (this.children.items, 0..) |child, child_index| {
const pos_in_parent = [2]f32{
child.anchor_in_parent[0] * parent_size[0],
child.anchor_in_parent[1] * parent_size[1],
@ -104,41 +106,69 @@ pub fn element_render(pointer: ?*anyopaque, canvas: *seizer.Canvas, render_resou
@min(max[1], pos_in_parent[1] + (child_size[1] - pos_in_child[1])),
};
child.element.interface.render(child.element.pointer, canvas, render_resources, child_min, child_max);
var child_render_resources = render_resources;
child_render_resources.hovered = render_resources.hovered and child_index == this.hovered;
child.element.interface.render(child.element.pointer, canvas, child_render_resources, child_min, child_max);
}
}
pub fn element_get_actions(pointer: ?*anyopaque, actions: *std.ArrayList(Element.Action), render_resources: Element.RenderResources, min: [2]f32, max: [2]f32) Element.Error!void {
pub fn element_event(pointer: ?*anyopaque, event: Element.Event) ?Element.Command {
const this: *@This() = @ptrCast(@alignCast(pointer));
const parent_size = [2]f32{
max[0] - min[0],
max[1] - min[1],
if (this.hovered < this.children.items.len) {
const hovered = this.children.items[this.hovered].element;
if (hovered.interface.event(hovered.pointer, event)) |cmd| {
return cmd;
}
}
const direction: [2]f32 = switch (event) {
.up => .{ 0, -1 },
.right => .{ 1, 0 },
.down => .{ 0, 1 },
.left => .{ -1, 0 },
else => return null,
};
for (this.children.items) |child| {
const pos_in_parent = [2]f32{
child.anchor_in_parent[0] * parent_size[0],
child.anchor_in_parent[1] * parent_size[1],
};
const current_center: [2]f32 = if (this.hovered < this.children.items.len) this.children.items[this.hovered].anchor_in_parent else .{ 0.5, 0.5 };
const child_size = child.element.interface.minimum_size(child.element.pointer, render_resources);
var new_distance: ?f32 = null;
var new_hovered: ?usize = null;
for (this.children.items, 0..) |child, child_index| {
if (child_index == this.hovered) {
continue;
}
if (distanceToAction(current_center, direction, child.anchor_in_parent)) |distance| {
if (new_distance == null or (new_distance != null and distance < new_distance.?)) {
new_hovered = child_index;
new_distance = distance;
}
}
}
const pos_in_child = [2]f32{
child.anchor_in_child[0] * child_size[0],
child.anchor_in_child[1] * child_size[1],
};
if (new_hovered) |h| {
this.hovered = h;
return Element.Command.none;
}
return null;
}
const child_min = [2]f32{
pos_in_parent[0] - pos_in_child[0],
pos_in_parent[1] - pos_in_child[1],
};
const child_max = [2]f32{
pos_in_parent[0] + (child_size[0] - pos_in_child[0]),
pos_in_parent[1] + (child_size[1] - pos_in_child[1]),
};
fn distanceToAction(origin: [2]f32, direction: [2]f32, other_pos: [2]f32) ?f32 {
const off_axis_dir = [2]f32{ direction[1], -direction[0] };
const offset = [2]f32{
other_pos[0] - origin[0],
other_pos[1] - origin[1],
};
try child.element.interface.get_actions(child.element.pointer, actions, render_resources, child_min, child_max);
// use dot product to check how in line with each direction the point of interest is
const in_axis_distance = offset[0] * direction[0] + offset[1] * direction[1];
const off_axis_distance = offset[0] * off_axis_dir[0] + offset[1] * off_axis_dir[1];
if (in_axis_distance > 0) {
return in_axis_distance + off_axis_distance * off_axis_distance;
} else {
return null;
}
}

13
src/Element/Text.zig
View File

@ -22,7 +22,7 @@ pub fn element(this: *@This()) Element {
.destroy = &element_destroy,
.minimum_size = &element_minimum_size,
.render = &element_render,
.get_actions = &element_get_actions,
.event = &element_event,
},
};
}
@ -46,12 +46,11 @@ pub fn element_render(pointer: ?*anyopaque, canvas: *seizer.Canvas, render_resou
_ = canvas.writeText(min, this.text, .{});
}
pub fn element_get_actions(pointer: ?*anyopaque, actions: *std.ArrayList(Element.Action), render_resources: Element.RenderResources, min: [2]f32, max: [2]f32) Element.Error!void {
_ = pointer;
_ = actions;
_ = render_resources;
_ = min;
_ = max;
pub fn element_event(pointer: ?*anyopaque, event: Element.Event) ?Element.Command {
const this: *@This() = @ptrCast(@alignCast(pointer));
_ = this;
_ = event;
return null;
}
const Element = @import("../Element.zig");

105
src/Element/View.zig
View File

@ -1,30 +1,27 @@
allocator: std.mem.Allocator,
reference: protocol.Reference,
handler_pointer: ?*anyopaque,
response: ?protocol.Response,
link_actions_in_view: std.AutoHashMapUnmanaged(*LinkProxy, void) = .{},
const View = @This();
const LinkProxy = struct {
view: *View,
reference: protocol.Reference,
fn callback(pointer: ?*anyopaque) void {
const this: *@This() = @ptrCast(@alignCast(pointer));
this.view.setReference(this.reference);
}
};
pub fn create(allocator: std.mem.Allocator, reference: protocol.Reference) !*@This() {
const this = try allocator.create(@This());
errdefer allocator.destroy(this);
var handler_pointer: ?*anyopaque = null;
switch (reference) {
.handler => |interface| if (interface.create) |handler_create| {
handler_pointer = try handler_create(allocator);
},
}
this.* = .{
.allocator = allocator,
.reference = reference,
.response = null,
.handler_pointer = handler_pointer,
};
return this;
}
@ -35,13 +32,18 @@ pub fn setReference(this: *@This(), reference: protocol.Reference) void {
this.response = null;
}
switch (this.reference) {
.handler => |interface| if (interface.deinit) |deinit| deinit(this.handler_pointer),
}
this.handler_pointer = null;
this.reference = reference;
var action_proxies_iter = this.link_actions_in_view.keyIterator();
while (action_proxies_iter.next()) |link_proxy| {
this.allocator.destroy(link_proxy.*);
switch (this.reference) {
.handler => |interface| if (interface.create) |handler_create| {
this.handler_pointer = handler_create(this.allocator) catch unreachable;
},
}
this.link_actions_in_view.clearRetainingCapacity();
}
pub fn element(this: *@This()) Element {
@ -51,7 +53,7 @@ pub fn element(this: *@This()) Element {
.destroy = &element_destroy,
.minimum_size = &element_minimum_size,
.render = &element_render,
.get_actions = &element_get_actions,
.event = &element_event,
},
};
}
@ -67,14 +69,8 @@ pub fn element_destroy(pointer: ?*anyopaque) void {
response.arena.deinit();
}
var action_proxies_iter = this.link_actions_in_view.keyIterator();
while (action_proxies_iter.next()) |link_proxy| {
this.allocator.destroy(link_proxy.*);
}
this.link_actions_in_view.deinit(this.allocator);
switch (this.reference) {
.handler => |handler| if (handler.interface.deinit) |deinit| deinit(handler.pointer),
.handler => |interface| if (interface.deinit) |deinit| deinit(this.handler_pointer),
}
this.allocator.destroy(this);
@ -95,7 +91,7 @@ pub fn element_render(pointer: ?*anyopaque, canvas: *seizer.Canvas, render_resou
const this: *@This() = @ptrCast(@alignCast(pointer));
if (this.response == null) {
this.response = this.reference.handler.interface.handle(this.reference.handler.pointer, .{
this.response = this.reference.handler.handle(this.handler_pointer, .{
.allocator = this.allocator,
}) catch response_error: {
std.log.warn("Could not get response", .{});
@ -104,70 +100,29 @@ pub fn element_render(pointer: ?*anyopaque, canvas: *seizer.Canvas, render_resou
}
if (this.response) |response| {
var child_render_resources = render_resources;
if (render_resources.hovered) |hovered| {
switch (hovered) {
.callback => |cb| {
if (this.link_actions_in_view.getKey(@ptrCast(@alignCast(cb.pointer)))) |link_proxy| {
child_render_resources.hovered = .{ .goto_reference = link_proxy.reference };
}
},
else => {},
}
}
switch (response.body) {
.element => |root| root.interface.render(root.pointer, canvas, child_render_resources, min, max),
.element => |root| root.interface.render(root.pointer, canvas, render_resources, min, max),
}
} else {
_ = canvas.writeText(min, LOADING_TEXT, .{});
}
}
pub fn element_get_actions(pointer: ?*anyopaque, actions: *std.ArrayList(Element.Action), render_resources: Element.RenderResources, min: [2]f32, max: [2]f32) Element.Error!void {
pub fn element_event(pointer: ?*anyopaque, event: Element.Event) ?Element.Command {
const this: *@This() = @ptrCast(@alignCast(pointer));
// clean up previous link actions
var action_proxies_iter = this.link_actions_in_view.keyIterator();
while (action_proxies_iter.next()) |link_proxy| {
this.allocator.destroy(link_proxy.*);
}
this.link_actions_in_view.clearRetainingCapacity();
var children_actions = std.ArrayList(Element.Action).init(this.allocator);
defer children_actions.deinit();
if (this.response) |response| {
switch (response.body) {
.element => |root| {
try root.interface.get_actions(root.pointer, &children_actions, render_resources, min, max);
.element => |root| if (root.interface.event(root.pointer, event)) |cmd| switch (cmd) {
.none => return Element.Command.none,
.goto_reference => |ref| {
this.setReference(ref);
},
},
}
}
for (children_actions.items) |child_action| {
switch (child_action.command) {
.goto_reference => |ref| {
const link_proxy_action = try this.allocator.create(LinkProxy);
try this.link_actions_in_view.put(this.allocator, link_proxy_action, {});
link_proxy_action.* = .{
.view = this,
.reference = ref,
};
try actions.append(.{
.center = child_action.center,
.command = .{
.callback = .{
.pointer = link_proxy_action,
.function = &LinkProxy.callback,
},
},
});
},
.callback => try actions.append(child_action),
}
}
return null;
}
const Element = @import("../Element.zig");

702
src/LocalUI.zig
View File

@ -1,9 +1,7 @@
pub const main_menu = Handler{
.pointer = null,
.interface = &.{
.handle = &main_menu_handler,
.deinit = null,
},
pub const main_menu = &Handler.Interface{
.create = null,
.handle = &main_menu_handler,
.deinit = null,
};
fn main_menu_handler(_: ?*anyopaque, request: Request) Handler.Error!Response {
@ -11,10 +9,10 @@ fn main_menu_handler(_: ?*anyopaque, request: Request) Handler.Error!Response {
errdefer arena.deinit();
var join_multiplayer_text = try Element.Text.create(arena.allocator(), "Join Multiplayer Game");
var join_multiplayer_link = try Element.Link.create(arena.allocator(), join_multiplayer_text.element(), .{ .handler = join_multiplayer_game });
var join_multiplayer_link = try Element.Link.create(arena.allocator(), join_multiplayer_text.element(), .{ .handler = JoinMultiplayerGame.INTERFACE });
var host_multiplayer_text = try Element.Text.create(arena.allocator(), "Host Multiplayer Game");
var host_multiplayer_link = try Element.Link.create(arena.allocator(), host_multiplayer_text.element(), .{ .handler = host_multiplayer_game });
var host_multiplayer_link = try Element.Link.create(arena.allocator(), host_multiplayer_text.element(), .{ .handler = HostMultiplayerGame.INTERFACE });
var play_game_hbox = try Element.HBox.create(arena.allocator());
try play_game_hbox.addElement(join_multiplayer_link.element());
@ -26,50 +24,674 @@ fn main_menu_handler(_: ?*anyopaque, request: Request) Handler.Error!Response {
return Response{ .arena = arena, .body = .{ .element = page.element() } };
}
pub const join_multiplayer_game = Handler{
.pointer = null,
.interface = &.{
.handle = &join_multiplayer_game_handler,
.deinit = null,
},
const JoinMultiplayerGame = struct {
allocator: std.mem.Allocator,
discovery_thread: std.Thread,
pub const INTERFACE = &Handler.Interface{
.create = &create,
.handle = &handler,
.deinit = &deinit,
};
fn create(allocator: std.mem.Allocator) Handler.Error!?*anyopaque {
const this = try allocator.create(@This());
errdefer allocator.destroy(this);
const discovery_thread = std.Thread.spawn(.{}, find_local_games_thread, .{allocator}) catch return error.OutOfMemory;
this.* = .{
.allocator = allocator,
.discovery_thread = discovery_thread,
};
return this;
}
fn handler(pointer: ?*anyopaque, request: Request) Handler.Error!Response {
const this: *@This() = @ptrCast(@alignCast(pointer));
_ = this;
var arena = std.heap.ArenaAllocator.init(request.allocator);
errdefer arena.deinit();
var text = try Element.Text.create(arena.allocator(), try std.fmt.allocPrint(arena.allocator(), "Looking for multiplayer games", .{}));
var page = try Element.Page.create(request.allocator);
try page.addElement(.{ 0.5, 0.5 }, .{ 0.5, 0.5 }, text.element());
return Response{ .arena = arena, .body = .{ .element = page.element() } };
}
fn deinit(pointer: ?*anyopaque) void {
const this: *@This() = @ptrCast(@alignCast(pointer));
this.allocator.destroy(this);
}
fn find_local_games_thread(allocator: std.mem.Allocator) !void {
const buffer = try allocator.alloc(u8, 2048);
defer allocator.free(buffer);
const log = std.log.scoped(.mdns);
log.info("mdns discovery service started", .{});
// IPv4
const mdns_ipv4_socket = c.mdns_socket_open_ipv4(null);
defer c.mdns_socket_close(mdns_ipv4_socket);
// IPv6
const mdns_ipv6_socket = c.mdns_socket_open_ipv6(null);
defer c.mdns_socket_close(mdns_ipv6_socket);
const service_name = "rummy._udp.local.";
for (&[_]c_int{ mdns_ipv4_socket, mdns_ipv6_socket }) |socket| {
switch (c.mdns_query_send(socket, c.MDNS_RECORDTYPE_PTR, service_name.ptr, service_name.len, buffer.ptr, buffer.len, 0)) {
0 => {},
else => |err_code| log.warn("Failed to send question; error code = {}", .{err_code}),
}
}
while (true) {
var pollfds = [_]std.os.pollfd{
.{ .fd = mdns_ipv4_socket, .events = std.os.POLL.IN, .revents = undefined },
.{ .fd = mdns_ipv6_socket, .events = std.os.POLL.IN, .revents = undefined },
};
_ = std.os.poll(&pollfds, 1000) catch break;
for (pollfds) |pollfd| {
if (pollfd.revents & std.os.POLL.IN == 0) continue;
_ = c.mdns_query_recv(pollfd.fd, buffer.ptr, buffer.len, &find_local_games_thread_query_callback, null, 0);
}
}
log.info("mdns service stopping", .{});
}
fn find_local_games_thread_query_callback(
sock: c_int,
from: ?*const c.sockaddr,
addrlen: usize,
entry: c.mdns_entry_type_t,
query_id: u16,
rtype: u16,
rclass: u16,
ttl: u32,
data_ptr_opaque: ?*const anyopaque,
data_len: usize,
name_offset: usize,
name_length: usize,
record_offset: usize,
record_length: usize,
userdata: ?*anyopaque,
) callconv(.C) c_int {
const log = std.log.scoped(.mdns);
_ = rclass;
_ = userdata;
_ = ttl;
_ = name_length;
_ = sock;
_ = addrlen;
_ = query_id;
// const data_ptr: [*]const u8 = @ptrCast(data_ptr_opaque.?);
// const data = data_ptr[0..data_len];
var name_buffer: [128]u8 = undefined;
var offset = name_offset;
const name_mdns_str = c.mdns_string_extract(data_ptr_opaque, data_len, &offset, &name_buffer, name_buffer.len);
const name = name_mdns_str.str[0..name_mdns_str.length];
const std_from: ?std.net.Address = if (from) |f| std.net.Address{ .any = @bitCast(f.*) } else null;
const entrytype_str = switch (entry) {
c.MDNS_ENTRYTYPE_QUESTION => "question",
c.MDNS_ENTRYTYPE_ANSWER => "answer",
c.MDNS_ENTRYTYPE_ADDITIONAL => "additional",
c.MDNS_ENTRYTYPE_AUTHORITY => "authority",
else => "???",
};
const recordtype_str = switch (rtype) {
c.MDNS_RECORDTYPE_PTR => "PTR",
c.MDNS_RECORDTYPE_SRV => "SRV",
c.MDNS_RECORDTYPE_A => "A",
c.MDNS_RECORDTYPE_AAAA => "AAAA",
c.MDNS_RECORDTYPE_TXT => "TXT",
else => "???",
};
if (rtype == c.MDNS_RECORDTYPE_PTR) {
log.info("{?} : {s} {s} \"{}\"", .{ std_from, entrytype_str, recordtype_str, std.zig.fmtEscapes(name) });
}
switch (rtype) {
c.MDNS_RECORDTYPE_PTR => {
var namebuffer: [128]u8 = undefined;
const namestr = c.mdns_record_parse_ptr(data_ptr_opaque, data_len, record_offset, record_length, &namebuffer, namebuffer.len);
log.info("{?} : {s} {s} \"{}\"", .{ std_from, entrytype_str, recordtype_str, std.zig.fmtEscapes(namestr.str[0..namestr.length]) });
},
else => {},
}
return 0;
}
};
fn join_multiplayer_game_handler(_: ?*anyopaque, request: Request) Handler.Error!Response {
var arena = std.heap.ArenaAllocator.init(request.allocator);
errdefer arena.deinit();
const HostMultiplayerGame = struct {
allocator: std.mem.Allocator,
mdns_addr4_string: []u8,
mdns_addr6_string: []u8,
var text = try Element.Text.create(arena.allocator(), "Joining Multiplayer Game");
mdns_socket4: std.os.socket_t,
mdns_socket6: std.os.socket_t,
var page = try Element.Page.create(arena.allocator());
try page.addElement(.{ 0.5, 0.5 }, .{ 0.5, 0.5 }, text.element());
service_string: []const u8,
service_instance_string: []const u8,
qualified_hostname: []const u8,
mdns_records: []c.mdns_record_t,
mdns_thread: std.Thread,
mdns_thread_should_stop: std.atomic.Value(bool),
return Response{ .arena = arena, .body = .{ .element = page.element() } };
}
address: c.ENetAddress,
server: *c.ENetHost,
pub const host_multiplayer_game = Handler{
.pointer = null,
.interface = &.{
.handle = &host_multiplayer_game_handler,
.deinit = null,
},
pub const INTERFACE = &Handler.Interface{
.create = &create,
.handle = &handler,
.deinit = &deinit,
};
fn create(allocator: std.mem.Allocator) Handler.Error!?*anyopaque {
const this = try allocator.create(@This());
errdefer allocator.destroy(this);
// setup ENet game server
const address = c.ENetAddress{
.host = c.ENET_HOST_ANY,
.port = 5711,
};
const server = c.enet_host_create(&address, 4, 2, 0, 0);
if (server == null) {
return error.OutOfMemory; // TODO: add better error message
}
// setup mDNS discovery service
const mdns_socket = std.os.socket(std.os.AF.INET, std.os.SOCK.DGRAM, std.os.IPPROTO.UDP) catch |e| {
std.log.scoped(.mdns).err("failed to open mdns socket = {}", .{e});
return error.OutOfMemory;
};
std.os.setsockopt(
mdns_socket,
std.os.SOL.SOCKET,
std.os.SO.REUSEADDR,
&std.mem.toBytes(@as(c_int, 1)),
) catch unreachable;
std.os.setsockopt(
mdns_socket,
std.os.SOL.SOCKET,
std.os.SO.REUSEPORT,
&std.mem.toBytes(@as(c_int, 1)),
) catch unreachable;
std.os.setsockopt(
mdns_socket,
std.os.IPPROTO.IP,
std.os.linux.IP.MULTICAST_TTL,
&std.mem.toBytes(@as(c_int, 1)),
) catch unreachable;
std.os.setsockopt(
mdns_socket,
std.os.IPPROTO.IP,
std.os.linux.IP.MULTICAST_LOOP,
&std.mem.toBytes(@as(c_int, 1)),
) catch unreachable;
const ip_mreq_t = extern struct {
multicast_address: [4]u8,
address: [4]u8,
};
std.os.setsockopt(
mdns_socket,
std.os.IPPROTO.IP,
std.os.linux.IP.ADD_MEMBERSHIP,
&std.mem.toBytes(ip_mreq_t{
.multicast_address = .{ 224, 0, 0, 251 },
.address = .{ 0, 0, 0, 0 },
}),
) catch unreachable;
const mdns_sock_addr = std.net.Address.parseIp4("0.0.0.0", c.MDNS_PORT) catch unreachable;
std.os.bind(mdns_socket, @ptrCast(&mdns_sock_addr), mdns_sock_addr.getOsSockLen()) catch |e| {
std.log.scoped(.mdns).err("bind failed = {}", .{e});
return error.OutOfMemory;
};
std.os.setsockopt(
mdns_socket,
std.os.IPPROTO.IP,
std.os.linux.IP.MULTICAST_IF,
&std.mem.toBytes(mdns_sock_addr.any),
) catch unreachable;
// ipv6 socket
const mdns_socket6 = std.os.socket(std.os.AF.INET6, std.os.SOCK.DGRAM, std.os.IPPROTO.UDP) catch |e| {
std.log.scoped(.mdns).err("failed to open mdns socket = {}", .{e});
return error.OutOfMemory;
};
std.os.setsockopt(
mdns_socket6,
std.os.SOL.SOCKET,
std.os.SO.REUSEADDR,
&std.mem.toBytes(@as(c_int, 1)),
) catch unreachable;
std.os.setsockopt(
mdns_socket6,
std.os.SOL.SOCKET,
std.os.SO.REUSEPORT,
&std.mem.toBytes(@as(c_int, 1)),
) catch unreachable;
std.os.setsockopt(
mdns_socket6,
std.os.IPPROTO.IPV6,
std.os.linux.IPV6.MULTICAST_HOPS,
&std.mem.toBytes(@as(c_int, 1)),
) catch unreachable;
std.os.setsockopt(
mdns_socket6,
std.os.IPPROTO.IPV6,
std.os.linux.IPV6.MULTICAST_LOOP,
&std.mem.toBytes(@as(c_int, 1)),
) catch unreachable;
std.os.setsockopt(
mdns_socket6,
std.os.IPPROTO.IPV6,
std.os.linux.IPV6.MULTICAST_IF,
&std.mem.toBytes(@as(c_int, 0)),
) catch unreachable;
const ipv6_mreq_t = extern struct {
addr: [16]u8,
interface: c_int,
};
// TODO: get ipv4 and ipv6 adress of server to send out over mDNS
// const SIOCGIFADDR = 0x8915;
// var ifr: std.os.ifreq = undefined;
// ifr.ifru.addr.family = std.os.AF.INET;
// const interface_name = "wlp170s0";
// @memset(&ifr.ifrn.name, 0);
// @memcpy(ifr.ifrn.name[0..interface_name.len], interface_name);
// const ifr_ret_value = std.os.linux.getErrno(std.os.linux.ioctl(mdns_socket6, SIOCGIFADDR, @intFromPtr(&ifr)));
// std.log.scoped(.mdns).debug("ioctl({}, SIOCGIFADDR, {*}) = {}", .{ mdns_socket6, &ifr, ifr_ret_value });
// std.os.ioctl_SIOCGIFINDEX(mdns_socket6, &ifr) catch unreachable;
// const interface = ifr.ifru.ivalue;
// const mdns_ipv6_multicast_group = std.net.Address.parseIp6("ff02::fb", c.MDNS_PORT) catch unreachable;
// var socklen = mdns_sock_addr6.getOsSockLen();
std.os.setsockopt(
mdns_socket6,
std.os.IPPROTO.IPV6,
std.os.linux.IPV6.ADD_MEMBERSHIP,
&std.mem.toBytes(ipv6_mreq_t{
.addr = .{ 0xFF, 0x02, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xFB },
.interface = 0,
}),
) catch unreachable;
const mdns_sock_addr6 = std.net.Address.parseIp6("::", c.MDNS_PORT) catch unreachable;
var socklen = mdns_sock_addr6.getOsSockLen();
std.os.bind(mdns_socket6, &mdns_sock_addr6.any, socklen) catch unreachable;
// std.os.listen(mdns_socket6, self.kernel_backlog) catch unreachable;
var mdns_listen_addr: std.net.Address = undefined;
std.os.getsockname(mdns_socket, &mdns_listen_addr.any, &socklen) catch unreachable;
const ipv4_sockaddr_string = try std.fmt.allocPrint(allocator, "{}", .{mdns_listen_addr});
socklen = mdns_sock_addr6.getOsSockLen();
var mdns_listen_addr6: std.net.Address = undefined;
std.os.getsockname(mdns_socket6, &mdns_listen_addr6.any, &socklen) catch unreachable;
const ipv6_sockaddr_string = try std.fmt.allocPrint(allocator, "{}", .{mdns_listen_addr6});
// // const SIOCGIFNAME = 0x8910;
// const ipv4_sockaddr: std.os.sockaddr.in = @bitCast(ifr.ifru.addr);
// // const ipv4_bytes: [4]u8 = @bitCast(ipv4_sockaddr.addr);
const service_string = try allocator.dupe(u8, "rummy._udp.local.");
var hostname_buffer: [std.os.HOST_NAME_MAX]u8 = undefined;
const hostname = std.os.gethostname(&hostname_buffer) catch unreachable;
// "<hostname>.<_service-name>._udp.local." string
const service_instance_string = try std.fmt.allocPrint(allocator, "{s}.{s}", .{
hostname,
service_string,
});
errdefer allocator.free(service_string);
const qualified_hostname = try std.fmt.allocPrint(allocator, "{s}.local.", .{hostname});
errdefer allocator.free(qualified_hostname);
std.log.scoped(.mdns).info("qualified hostname = \"{}\"", .{std.zig.fmtEscapes(qualified_hostname)});
// Create DNS records
var mdns_records = std.ArrayList(c.mdns_record_t).init(allocator);
defer mdns_records.deinit();
// DNS PTR that maps "<service_string>._udp.local." to "<hostname>.<service_string>._udp.local."
try mdns_records.append(c.mdns_record_t{
.name = .{ .str = service_string.ptr, .length = service_string.len },
.type = c.MDNS_RECORDTYPE_PTR,
.data = .{ .ptr = .{ .name = .{ .str = service_instance_string.ptr, .length = service_instance_string.len } } },
.rclass = 0,
.ttl = 0,
});
// DNS SRV that maps "<hostname>.<service_string>._udp.local." to "<hostname>.local.:<PORT>"
try mdns_records.append(c.mdns_record_t{
.name = .{ .str = service_instance_string.ptr, .length = service_instance_string.len },
.type = c.MDNS_RECORDTYPE_SRV,
.data = .{ .srv = .{
.name = .{ .str = qualified_hostname.ptr, .length = qualified_hostname.len },
.port = address.port,
.priority = 0,
.weight = 0,
} },
.rclass = 0,
.ttl = 0,
});
// TODO: Add AAAA and A records to mdns service
// // DNS A that maps "<hostname>.local." to the an ip address
// const mdns_a_record = c.mdns_record_t{
// .name = .{ .str = qualified_hostname.ptr, .length = qualified_hostname.len },
// .type = c.MDNS_RECORDTYPE_A,
// .data = .{ .a = .{
// .addr = @bitCast(ipv4_sockaddr),
// } },
// .rclass = 0,
// .ttl = 0,
// };
// try mdns_records.append(mdns_a_record);
const mdns_record_slice = try mdns_records.toOwnedSlice();
errdefer allocator.free(mdns_record_slice);
this.* = .{
.allocator = allocator,
.mdns_addr4_string = ipv4_sockaddr_string,
.mdns_addr6_string = ipv6_sockaddr_string,
.mdns_socket4 = mdns_socket,
.mdns_socket6 = mdns_socket6,
.service_string = service_string,
.service_instance_string = service_instance_string,
.qualified_hostname = qualified_hostname,
.mdns_records = mdns_record_slice,
.mdns_thread = undefined,
.mdns_thread_should_stop = std.atomic.Value(bool).init(false),
.address = address,
.server = server,
};
this.mdns_thread = std.Thread.spawn(.{}, mdns_thread_main, .{this}) catch return error.OutOfMemory;
return this;
}
fn handler(pointer: ?*anyopaque, request: Request) Handler.Error!Response {
const this: *@This() = @ptrCast(@alignCast(pointer));
var arena = std.heap.ArenaAllocator.init(request.allocator);
errdefer arena.deinit();
// var text = try Element.Text.create(arena.allocator(), try std.fmt.allocPrint(arena.allocator(), "Hosting Multiplayer Game at {}:{}", .{ this.address.host, this.address.port }));
var mdns_addr4_string_text = try Element.Text.create(request.allocator, this.mdns_addr4_string);
var mdns_addr6_string_text = try Element.Text.create(request.allocator, this.mdns_addr6_string);
var service_instance_string_text = try Element.Text.create(request.allocator, this.service_instance_string);
var qualified_hostname_text = try Element.Text.create(request.allocator, this.qualified_hostname);
var page = try Element.Page.create(request.allocator);
// try page.addElement(.{ 0.5, 0.5 }, .{ 0.5, 0.5 }, text.element());
try page.addElement(.{ 0.3, 0.6 }, .{ 0.5, 0.5 }, mdns_addr4_string_text.element());
try page.addElement(.{ 0.7, 0.6 }, .{ 0.5, 0.5 }, mdns_addr6_string_text.element());
try page.addElement(.{ 0.5, 0.7 }, .{ 0.5, 0.5 }, service_instance_string_text.element());
try page.addElement(.{ 0.5, 0.9 }, .{ 0.5, 0.5 }, qualified_hostname_text.element());
return Response{ .arena = arena, .body = .{ .element = page.element() } };
}
fn deinit(pointer: ?*anyopaque) void {
const this: *@This() = @ptrCast(@alignCast(pointer));
c.enet_host_destroy(this.server);
this.mdns_thread_should_stop.store(true, .Monotonic);
this.mdns_thread.join();
this.allocator.free(this.mdns_records);
this.allocator.free(this.mdns_addr4_string);
this.allocator.free(this.mdns_addr6_string);
this.allocator.free(this.service_string);
this.allocator.free(this.service_instance_string);
this.allocator.free(this.qualified_hostname);
this.allocator.destroy(this);
}
fn mdns_thread_main(this: *@This()) !void {
const buffer = try this.allocator.alloc(u8, 2048);
defer this.allocator.free(buffer);
const log = std.log.scoped(.mdns);
log.info("mdns service started", .{});
_ = c.mdns_announce_multicast(
this.mdns_socket4,
buffer.ptr,
buffer.len,
this.mdns_records[0],
null,
0,
this.mdns_records[1..].ptr,
this.mdns_records[1..].len,
);
_ = c.mdns_announce_multicast(
this.mdns_socket6,
buffer.ptr,
buffer.len,
this.mdns_records[0],
null,
0,
this.mdns_records[1..].ptr,
this.mdns_records[1..].len,
);
while (!this.mdns_thread_should_stop.load(.Monotonic)) {
var pollfds = [_]std.os.pollfd{
.{ .fd = this.mdns_socket4, .events = std.os.POLL.IN, .revents = undefined },
.{ .fd = this.mdns_socket6, .events = std.os.POLL.IN, .revents = undefined },
};
_ = std.os.poll(&pollfds, 1000) catch break;
for (pollfds) |pollfd| {
if (pollfd.revents & std.os.POLL.IN == 0) continue;
_ = c.mdns_socket_listen(pollfd.fd, buffer.ptr, buffer.len, &mdns_thread_service_callback, this);
}
}
log.info("mdns service stopping", .{});
}
fn mdns_thread_service_callback(
sock: c_int,
from: ?*const c.sockaddr,
addrlen: usize,
entry: c.mdns_entry_type_t,
query_id: u16,
rtype: u16,
rclass: u16,
ttl: u32,
data_ptr_opaque: ?*const anyopaque,
data_len: usize,
name_offset: usize,
name_length: usize,
record_offset: usize,
record_length: usize,
userdata: ?*anyopaque,
) callconv(.C) c_int {
const log = std.log.scoped(.mdns);
if (entry != c.MDNS_ENTRYTYPE_QUESTION) return 0;
const DNS_SD = "_services._dns-sd._udp.local.";
const this: *@This() = @ptrCast(@alignCast(userdata));
_ = ttl;
_ = record_offset;
_ = record_length;
_ = name_length;
// const data_ptr: [*]const u8 = @ptrCast(data_ptr_opaque.?);
// const data = data_ptr[0..data_len];
var name_buffer: [128]u8 = undefined;
var offset = name_offset;
const name_mdns_str = c.mdns_string_extract(data_ptr_opaque, data_len, &offset, &name_buffer, name_buffer.len);
const name = name_mdns_str.str[0..name_mdns_str.length];
const std_from: ?std.net.Address = if (from) |f| std.net.Address{ .any = @bitCast(f.*) } else null;
if (std.mem.eql(u8, name, DNS_SD)) {
const answer = c.mdns_record_t{
.name = .{ .str = name.ptr, .length = name.len },
.type = c.MDNS_RECORDTYPE_PTR,
.data = .{ .ptr = .{ .name = .{ .str = DNS_SD, .length = DNS_SD.len } } },
};
var sendbuffer: [1024]u8 = undefined;
if (rclass & c.MDNS_UNICAST_RESPONSE != 0) {
const ret_val = c.mdns_query_answer_unicast(
sock,
from,
addrlen,
&sendbuffer,
sendbuffer.len,
query_id,
rtype,
name.ptr,
name.len,
answer,
0,
0,
0,
0,
);
if (ret_val < 0) {
log.warn("{s}:{} failed to answer query, error code = {}", .{ @src().file, @src().line, ret_val });
}
} else {
const ret_val = c.mdns_query_answer_multicast(
sock,
&sendbuffer,
sendbuffer.len,
answer,
0,
0,
0,
0,
);
if (ret_val < 0) {
log.warn("{s}:{} failed to answer query, error code = {}", .{ @src().file, @src().line, ret_val });
}
}
} else if (std.mem.eql(u8, name, this.service_string)) {
const answer = this.mdns_records[0];
const additional = this.mdns_records[1..];
log.debug("heard service name \"{}\", sending answer {} and {} additional records", .{ std.zig.fmtEscapes(name), answer, additional.len });
var sendbuffer: [1024]u8 = undefined;
if (rclass & c.MDNS_UNICAST_RESPONSE != 0) {
log.debug("{s}:{} unicast response to {?}", .{ @src().file, @src().line, std_from });
const ret_val = c.mdns_query_answer_unicast(
sock,
from,
addrlen,
&sendbuffer,
sendbuffer.len,
query_id,
rtype,
name.ptr,
name.len,
answer,
0,
0,
additional.ptr,
additional.len,
);
if (ret_val < 0) {
log.warn("{s}:{} failed to answer query with unicast, error code = {}", .{ @src().file, @src().line, ret_val });
}
} else {
log.debug("{s}:{} multicast response", .{ @src().file, @src().line });
const ret_val = c.mdns_query_answer_multicast(
sock,
&sendbuffer,
sendbuffer.len,
answer,
0,
0,
additional.ptr,
additional.len,
);
if (ret_val < 0) {
log.warn("{s}:{} failed to answer query with multicast, error code = {}", .{ @src().file, @src().line, ret_val });
}
}
} else if (std.mem.eql(u8, name, this.service_instance_string)) {
const answer = this.mdns_records[1];
var sendbuffer: [1024]u8 = undefined;
if (rclass & c.MDNS_UNICAST_RESPONSE != 0) {
_ = c.mdns_query_answer_unicast(
sock,
from,
addrlen,
&sendbuffer,
sendbuffer.len,
query_id,
rtype,
name.ptr,
name.len,
answer,
null,
0,
null,
0,
);
} else {
_ = c.mdns_query_answer_multicast(
sock,
&sendbuffer,
sendbuffer.len,
answer,
null,
0,
null,
0,
);
}
}
return 0;
}
};
fn host_multiplayer_game_handler(_: ?*anyopaque, request: Request) Handler.Error!Response {
var arena = std.heap.ArenaAllocator.init(request.allocator);
errdefer arena.deinit();
var text = try Element.Text.create(arena.allocator(), "Hosting Multiplayer Game");
var page = try Element.Page.create(arena.allocator());
try page.addElement(.{ 0.5, 0.5 }, .{ 0.5, 0.5 }, text.element());
return Response{ .arena = arena, .body = .{ .element = page.element() } };
}
const Handler = protocol.Handler;
const Request = protocol.Request;
const Response = protocol.Response;
const c = @import("./c.zig");
const protocol = @import("./protocol.zig");
const Element = @import("./Element.zig");

4
src/c.zig Normal file
View File

@ -0,0 +1,4 @@
pub usingnamespace @cImport({
@cInclude("enet/enet.h");
@cInclude("mdns.h");
});

115
src/main.zig
View File

@ -187,12 +187,6 @@ pub fn main() !void {
const main_view = try Element.View.create(gpa.allocator(), .{ .handler = LocalUI.main_menu });
defer main_view.element().interface.destroy(main_view.element().pointer);
var actions = std.ArrayList(Element.Action).init(gpa.allocator());
defer actions.deinit();
// TODO: Restore hovered_action when undoing
var hovered_action: ?Element.Action = null;
if (seizer.backend.glfw.c.glfwJoystickIsGamepad(seizer.backend.glfw.c.GLFW_JOYSTICK_1) != 0) {
std.log.info("detected gamepad = \"{?s}\" {?s}", .{ seizer.backend.glfw.c.glfwGetGamepadName(seizer.backend.glfw.c.GLFW_JOYSTICK_1), seizer.backend.glfw.c.glfwGetJoystickGUID(seizer.backend.glfw.c.GLFW_JOYSTICK_1) });
} else if (seizer.backend.glfw.c.glfwJoystickPresent(seizer.backend.glfw.c.GLFW_JOYSTICK_1) != 0) {
@ -276,58 +270,49 @@ pub fn main() !void {
prev_controller_input_state = controller_input_state;
}
if (hovered_action) |hovered| {
if (input_state.action) {
switch (hovered.command) {
.goto_reference => {
std.debug.panic("Got `.goto_reference` action at top-level; expected `main_view` to proxy them all into LinkProxy callbacks.", .{});
},
.callback => |cb| {
cb.function(cb.pointer);
},
}
}
} else if (actions.items.len > 0) {
hovered_action = actions.items[0];
}
if (input_state.up) _ = main_view.element().interface.event(main_view.element().pointer, .up);
if (input_state.right) _ = main_view.element().interface.event(main_view.element().pointer, .right);
if (input_state.down) _ = main_view.element().interface.event(main_view.element().pointer, .down);
if (input_state.left) _ = main_view.element().interface.event(main_view.element().pointer, .left);
if (input_state.action) _ = main_view.element().interface.event(main_view.element().pointer, .activate);
if (hovered_action) |hovered| {
var direction = [2]f32{ 0, 0 };
if (input_state.left) {
direction[0] -= 1;
}
if (input_state.right) {
direction[0] += 1;
}
if (input_state.up) {
direction[1] -= 1;
}
if (input_state.down) {
direction[1] += 1;
}
// if (hovered_action) |hovered| {
// var direction = [2]f32{ 0, 0 };
// if (input_state.left) {
// direction[0] -= 1;
// }
// if (input_state.right) {
// direction[0] += 1;
// }
// if (input_state.up) {
// direction[1] -= 1;
// }
// if (input_state.down) {
// direction[1] += 1;
// }
var new_distance: ?f32 = null;
var new_action = hovered;
for (actions.items) |action| {
if (std.meta.eql(action.command, hovered.command)) {
continue;
}
if (distanceToAction(hovered.center, direction, action.center)) |distance| {
if (new_distance == null or (new_distance != null and distance < new_distance.?)) {
new_action = Element.Action{
.center = .{
if (input_state.left or input_state.right) action.center[0] else hovered.center[0],
if (input_state.up or input_state.down) action.center[1] else hovered.center[1],
},
.command = action.command,
};
new_distance = distance;
}
}
}
// var new_distance: ?f32 = null;
// var new_action = hovered;
// for (actions.items) |action| {
// if (std.meta.eql(action.command, hovered.command)) {
// continue;
// }
// if (distanceToAction(hovered.center, direction, action.center)) |distance| {
// if (new_distance == null or (new_distance != null and distance < new_distance.?)) {
// new_action = Element.Action{
// .center = .{
// if (input_state.left or input_state.right) action.center[0] else hovered.center[0],
// if (input_state.up or input_state.down) action.center[1] else hovered.center[1],
// },
// .command = action.command,
// };
// new_distance = distance;
// }
// }
// }
hovered_action = new_action;
}
// hovered_action = new_action;
// }
gl.clearColor(0.7, 0.5, 0.5, 1.0);
gl.clear(gl.COLOR_BUFFER_BIT);
@ -373,7 +358,7 @@ pub fn main() !void {
main_view.element().pointer,
&canvas,
.{
.hovered = if (hovered_action) |ha| ha.command else null,
.hovered = true,
.deck = deck_sprites,
.font = canvas.font,
},
@ -384,27 +369,9 @@ pub fn main() !void {
},
);
_ = canvas.printText(.{ 0, 0 }, "#actions = {}", .{actions.items.len}, .{});
canvas.end();
seizer.backend.glfw.c.glfwSwapBuffers(window);
actions.clearRetainingCapacity();
try main_view.element().interface.get_actions(
main_view.element().pointer,
&actions,
.{
.hovered = if (hovered_action) |ha| ha.command else null,
.deck = deck_sprites,
.font = canvas.font,
},
.{ 0, 0 },
.{
@floatFromInt(window_size[0]),
@floatFromInt(window_size[1]),
},
);
}
}

3
src/protocol.zig
View File

@ -5,13 +5,14 @@ pub const Handler = struct {
pub const Error = error{OutOfMemory};
pub const Fn = *const fn (Request) Error!Response;
pub const Interface = struct {
create: ?*const fn (std.mem.Allocator) Error!?*anyopaque,
handle: *const fn (?*anyopaque, Request) Error!Response,
deinit: ?*const fn (?*anyopaque) void,
};
};
pub const Reference = union(enum) {
handler: Handler,
handler: *const Handler.Interface,
};
pub const Request = struct {