gramps
460b36204d
Creator, plainly: "the entire point of a ticker is to tick… so, tick." The static strip was my reading of an earlier exchange; it is gone. How it ticks without becoming the compositor's most expensive layer: - `ScoreboardRenderer.RenderRun` rasterises the run ONCE per value change at its natural width plus a gap. - `ScoreboardPresenter` crops a 1920-wide window at a moving offset each tick — a row-wise byte copy, no text layout, no re-raster. - `TickScoreboard` runs on the existing 30 Hz meter clock and only while the strip is shown, so a hidden or disabled scoreboard costs nothing. The dev simulation uses the same path, so what is previewed is what ships. Test updated to the real contract: no tick → identical pixels; a tick → different pixels; a value change → re-rasterised run. (The old test asserted frame-instance identity, which a cropped window can never satisfy.)
74 lines
2.9 KiB
C#
74 lines
2.9 KiB
C#
using System.Linq;
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using System.Threading;
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using Xunit;
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using ytLive.Models;
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using ytLive.Services.Compositor;
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namespace ytLive.Tests;
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/// <summary>The strip's cache is a performance rule with teeth: it must rebuild when a displayed
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/// value moves and must NOT rebuild otherwise, or the compositor pays for a raster per tick into
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/// pixels that did not change.</summary>
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public class ScoreboardPresenterTests
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{
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private static ChatMessage Member(string name) => new() { Kind = ChatEventKind.NewMember, AuthorName = name };
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[Fact]
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public void The_strip_rebuilds_only_when_a_displayed_value_moves()
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{
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System.Exception? failure = null;
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var thread = new Thread(() =>
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{
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try
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{
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var recorder = new ScoreboardRecorder();
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var tiles = new ScoreboardTiles
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{
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SuperChats = false, WatchHours = false, Subscribers = false,
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NewMembers = true, Milestones = false, LastMember = true,
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LastSuperChat = false, LastGift = false,
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};
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var presenter = new ScoreboardPresenter(recorder, new ScoreboardStyle());
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presenter.SetTiles(tiles);
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// Before a session: nothing counted, nothing to draw.
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Assert.Null(presenter.Frame);
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recorder.StartSession();
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recorder.Record(Member("First"));
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var first = presenter.Frame;
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Assert.NotNull(first);
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// No tick, no change: the same pixels come back (the run is cached).
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Assert.Equal(first!.BgraPixels, presenter.Frame!.BgraPixels);
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// A TICK moves the window: the pixels must differ.
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presenter.Advance(0.5);
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var ticked = presenter.Frame;
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Assert.NotNull(ticked);
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Assert.NotEqual(first.BgraPixels, ticked!.BgraPixels);
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// A visible change re-rasterises the run.
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recorder.Record(Member("Second"));
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var second = presenter.Frame;
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Assert.NotNull(second);
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Assert.NotEqual(ticked.BgraPixels, second!.BgraPixels);
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// A gift-recipient event changes nothing displayed: same window, same pixels.
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var beforeGift = presenter.Frame!.BgraPixels.ToArray();
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recorder.Record(new ChatMessage { Kind = ChatEventKind.GiftReceived, AuthorName = "Recipient" });
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Assert.Equal(beforeGift, presenter.Frame!.BgraPixels);
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// Disabling every tile returns no frame, and the layer draws nothing.
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presenter.SetTiles(ScoreboardTiles.None);
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Assert.Null(presenter.Frame);
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}
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catch (System.Exception ex) { failure = ex; }
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});
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thread.SetApartmentState(ApartmentState.STA);
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thread.Start();
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thread.Join();
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Assert.Null(failure);
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}
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}
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