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core: setup linux to detect and select x11 or wayland implementation

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Joshua Holmes 2024-09-10 23:46:14 -07:00 • committed by Stephen Gutekanst
parent 9ffaddd77a
commit d65588bc2d
1 changed files with 67 additions and 5 deletions
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72
src/core/Linux.zig
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@ -1,6 +1,8 @@
const std = @import("std");
const mach = @import("../main.zig");
const Core = @import("../Core.zig");
const X11 = @import("linux/X11.zig");
const Wayland = @import("linux/Wayland.zig");
const gpu = mach.gpu;
const InitOptions = Core.InitOptions;
const Event = Core.Event;
@ -19,12 +21,15 @@ const KeyMods = Core.KeyMods;
const log = std.log.scoped(.mach);
const gamemode_log = std.log.scoped(.gamemode);
const Backend = union(enum) {
x11: X11,
wayland: Wayland,
};
pub const Linux = @This();
allocator: std.mem.Allocator,
core: *Core,
modifiers: KeyMods,
title: [:0]u8,
display_mode: DisplayMode,
vsync_mode: VSyncMode,
cursor_mode: CursorMode,
@ -35,20 +40,77 @@ refresh_rate: u32,
size: Size,
surface_descriptor: gpu.Surface.Descriptor,
gamemode: ?bool = null,
backend: Backend,
pub fn init(
linux: *Linux,
core: *Core.Mod,
options: InitOptions,
) !void {
_ = core;
linux.allocator = options.allocator;
if (!options.is_app and try wantGamemode(linux.allocator)) linux.gamemode = initLinuxGamemode();
const desired_backend: Backend = blk: {
const backend = std.process.getEnvVarOwned(
linux.allocator,
"MACH_CORE_BACKEND",
) catch |err| switch (err) {
error.EnvironmentVariableNotFound => {
// TODO(core): default to .x11 in the future
break :blk .wayland;
},
else => return err,
};
defer linux.allocator.free(backend);
if (std.ascii.eqlIgnoreCase(backend, "x11")) break :blk .x11;
if (std.ascii.eqlIgnoreCase(backend, "wayland")) break :blk .wayland;
std.debug.panic("mach: unknown MACH_CORE_BACKEND: {s}", .{backend});
};
if (desired_backend == .x11) {
// TODO(core): support X11 in the future
@panic("X11 is not supported...YET");
}
// Try to initialize the desired backend, falling back to the other if that one is not supported
switch (desired_backend) {
.x11 => {
const x11 = X11.init(core, options) catch |err| switch (err) {
error.NotSupported => {
log.err("failed to initialize X11 backend, falling back to Wayland", .{});
linux.backend = .{ .wayland = try Wayland.init(linux, core, options) };
},
else => return err,
};
linux.backend = .{ .x11 = x11 };
},
.wayland => {
const wayland = Wayland.init(core, options) catch |err| switch (err) {
error.NotSupported => {
log.err("failed to initialize Wayland backend, falling back to X11", .{});
linux.backend = .{ .x11 = try X11.init(linux, core, options) };
// TODO(core): support X11 in the future
@panic("X11 is not supported...YET");
},
else => return err,
};
linux.backend = .{ .wayland = wayland };
},
}
linux.size = linux.backend.size;
linux.surface_descriptor = linux.backend.surface_descriptor;
linux.refresh_rate = 60; // TODO: set to something meaningful
if (!options.is_app and try wantGamemode(options.allocator)) linux.gamemode = initLinuxGamemode();
return;
}
pub fn deinit(linux: *Linux) void {
if (linux.gamemode != null and linux.gamemode.?) deinitLinuxGamemode();
linux.backend.deinit();
return;
}