Adjust Doom animation speed through config.ini

res/config.ini

@@ -4,6 +4,9 @@
 # matrix -> CMatrix
 animation = none
 
+# Adjust doom animation speed by adding some delay (in milliseconds) when it draws the flames.
+doom_delay = 0
+
 # Format string for clock in top right corner (see strftime specification). Example: %c
 clock = null
 

src/animations/Doom.zig

@@ -28,8 +28,9 @@ pub const FIRE = [_]termbox.tb_cell{
 allocator: Allocator,
 terminal_buffer: *TerminalBuffer,
 buffer: []u8,
+delay: u64,
 
-pub fn init(allocator: Allocator, terminal_buffer: *TerminalBuffer) !Doom {
+pub fn init(allocator: Allocator, terminal_buffer: *TerminalBuffer, delay: u64) !Doom {
     const buffer = try allocator.alloc(u8, terminal_buffer.width * terminal_buffer.height);
     initBuffer(buffer, terminal_buffer.width);
 
@@ -37,6 +38,7 @@ pub fn init(allocator: Allocator, terminal_buffer: *TerminalBuffer) !Doom {
         .allocator = allocator,
         .terminal_buffer = terminal_buffer,
         .buffer = buffer,
+        .delay = delay,
     };
 }
 
@@ -72,6 +74,8 @@ pub fn draw(self: Doom) void {
             self.terminal_buffer.buffer[source] = FIRE[buffer_source];
         }
     }
+    // Delay related code
+    std.time.sleep(std.time.ns_per_ms * self.delay);
 }
 
 fn initBuffer(buffer: []u8, width: u64) void {

src/config/Config.zig

@@ -11,12 +11,17 @@ bigclock: bool = false,
 blank_box: bool = true,
 border_fg: u8 = 8,
 box_title: ?[]const u8 = null,
+brightness_down_key: []const u8 = "F5",
+brightness_up_key: []const u8 = "F6",
+brightnessctl: []const u8 = "/usr/bin/brightnessctl",
+brightness_change: []const u8 = "10",
 clear_password: bool = false,
 clock: ?[:0]const u8 = null,
+cmatrix_fg: u8 = 3,
 console_dev: [:0]const u8 = "/dev/console",
 default_input: Input = .login,
+doom_delay: u64 = 0,
 fg: u8 = 8,
-cmatrix_fg: u8 = 3,
 hide_borders: bool = false,
 hide_key_hints: bool = false,
 initial_info_text: ?[]const u8 = null,
@@ -52,7 +57,3 @@ xinitrc: ?[]const u8 = "~/.xinitrc",
 x_cmd_setup: []const u8 = build_options.data_directory ++ "/xsetup.sh",
 xauth_cmd: []const u8 = "/usr/bin/xauth",
 xsessions: []const u8 = "/usr/share/xsessions",
-brightness_down_key: []const u8 = "F5",
-brightness_up_key: []const u8 = "F6",
-brightnessctl: []const u8 = "/usr/bin/brightnessctl",
-brightness_change: []const u8 = "10",

src/main.zig

@@ -229,7 +229,7 @@ pub fn main() !void {
 
     switch (config.animation) {
         .none => {},
-        .doom => doom = try Doom.init(allocator, &buffer),
+        .doom => doom = try Doom.init(allocator, &buffer, config.doom_delay),
         .matrix => matrix = try Matrix.init(allocator, &buffer, config.cmatrix_fg),
     }
     defer {