added refresh interval in ms for animations

res/config.ini

@@ -35,6 +35,14 @@
 # matrix -> CMatrix
 animation = none
 
+# The minimum time between animation frames
+# 32 -> ~30fps
+# 16 -> ~60fps
+# 8  -> ~120fps
+# 6  -> ~144fps
+# 4  -> ~240fps
+animation_refresh_ms = 16
+
 # Stop the animation after some time
 # 0 -> Run forever
 # 1..2e12 -> Stop the animation after this many seconds

src/animations/Doom.zig

@@ -50,7 +50,7 @@ pub fn realloc(self: *Doom) !void {
     self.buffer = buffer;
 }
 
-pub fn draw(self: Doom) void {
+pub fn draw_with_update(self: Doom) void {
     for (0..self.terminal_buffer.width) |x| {
         for (1..self.terminal_buffer.height) |y| {
             const source = y * self.terminal_buffer.width + x;
@@ -74,6 +74,18 @@ pub fn draw(self: Doom) void {
     }
 }
 
+pub fn draw(self: Doom) void {
+    for (0..self.terminal_buffer.width) |x| {
+        for (1..self.terminal_buffer.height) |y| {
+            const source = y * self.terminal_buffer.width + x;
+
+            const buffer_source = self.buffer[source];
+
+            self.terminal_buffer.buffer[source] = toTermboxCell(FIRE[buffer_source]);
+        }
+    }
+}
+
 fn initBuffer(buffer: []u8, width: usize) void {
     const length = buffer.len - width;
     const slice_start = buffer[0..length];

src/animations/Matrix.zig

@@ -68,14 +68,12 @@ pub fn realloc(self: *Matrix) !void {
     self.lines = lines;
 }
 
-pub fn draw(self: *Matrix) void {
+pub fn draw_with_update(self: *Matrix) void {
     const buf_height = self.terminal_buffer.height;
     const buf_width = self.terminal_buffer.width;
-    self.count += 1;
-    if (self.count > FRAME_DELAY) {
+
     self.frame += 1;
     if (self.frame > 4) self.frame = 1;
-        self.count = 0;
 
     var x: usize = 0;
     while (x < self.terminal_buffer.width) : (x += 2) {
@@ -140,8 +138,13 @@ pub fn draw(self: *Matrix) void {
             first_col = false;
         }
     }
+
+    self.draw();
 }
 
+pub fn draw(self: *Matrix) void {
+    const buf_width = self.terminal_buffer.width;
+
     var x: usize = 0;
     while (x < buf_width) : (x += 2) {
         var y: usize = 1;

src/config/Config.zig

@@ -8,6 +8,7 @@ const Bigclock = enums.Bigclock;
 
 animation: Animation = .none,
 animation_timeout_sec: u12 = 0,
+animation_refresh_ms: u16 = 16,
 asterisk: ?u8 = '*',
 auth_fails: u64 = 10,
 bg: u16 = 0,

src/main.zig

@@ -317,6 +317,11 @@ pub fn main() !void {
         }
     }
 
+    var animation_timer = switch(config.animation) {
+        .none => undefined,
+        else => try std.time.Timer.start()
+    };
+
     const animate = config.animation != .none;
     const shutdown_key = try std.fmt.parseInt(u8, config.shutdown_key[1..], 10);
     const shutdown_len = try utils.strWidth(lang.shutdown);
@@ -340,6 +345,7 @@ pub fn main() !void {
         try info_line.addMessage(lang.err_console_dev, config.error_bg, config.error_fg);
     };
 
+
     while (run) {
         // If there's no input or there's an animation, a resolution change needs to be checked
         if (!update or config.animation != .none) {
@@ -380,8 +386,22 @@ pub fn main() !void {
                 if (!animation_timed_out) {
                     switch (config.animation) {
                         .none => {},
-                        .doom => doom.draw(),
-                        .matrix => matrix.draw(),
+                        .doom => {
+                            if (animation_timer.read() / std.time.ns_per_ms > config.animation_refresh_ms) {
+                                animation_timer.reset();
+                                doom.draw_with_update();
+                            } else {
+                                doom.draw();
+                            }
+                        },
+                        .matrix => {
+                            if (animation_timer.read() / std.time.ns_per_ms > config.animation_refresh_ms) {
+                                animation_timer.reset();
+                                matrix.draw_with_update();
+                            } else {
+                                matrix.draw();
+                            }
+                        },
                     }
                 }