36 lines
809 B
Zig
36 lines
809 B
Zig
const std = @import("std");
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pub fn sext(comptime bits: comptime_int, value: u32) u32 {
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comptime std.debug.assert(bits <= 32);
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const amount = 32 - bits;
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return @bitCast(u32, @bitCast(i32, value << amount) >> amount);
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}
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pub const FpsAverage = struct {
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const Self = @This();
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total: u64,
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sample_count: u64,
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pub fn init() Self {
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return .{ .total = 0, .sample_count = 0 };
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}
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pub fn add(self: *Self, sample: u64) void {
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if (self.sample_count == 1000) return self.reset(sample);
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self.total += sample;
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self.sample_count += 1;
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}
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pub fn calc(self: *const Self) u64 {
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return self.total / self.sample_count;
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}
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fn reset(self: *Self, sample: u64) void {
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self.total = sample;
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self.sample_count = 1;
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}
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};
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