gramps
5c4acf141b
Raster static text on UI-thread changes and reuse the same transparent BGRA frame in preview and all compositor paths. Cache text frame identity in the frame-pump signature and invalidate static bakes on edits. Follow OBS text-source conventions: https://obsproject.com/kb/text-sources
55 lines
1.8 KiB
C#
55 lines
1.8 KiB
C#
using System.Windows;
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using System.Windows.Controls;
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using System.Windows.Media.Imaging;
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using Xunit;
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using ytLive.Models;
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using ytLive.Services;
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namespace ytLive.Tests;
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[Collection("RealApp")]
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public sealed class TextOverlayRendererTests
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{
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private readonly RealAppHost _app;
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public TextOverlayRendererTests(RealAppHost app) => _app = app;
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[Fact]
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public void Raster_IsCached_And_PreviewBitmap_Uses_The_Same_Transparent_Pixels()
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{
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_app.Run(() =>
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{
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var source = new Source
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{
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Type = SourceType.TextOverlay,
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TextContent = "Cached text",
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Width = 220,
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Height = 70,
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TextFontSize = 36,
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TextColor = "#80FFFFFF",
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TextBold = true,
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TextUnderline = true,
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};
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var renderer = new TextOverlayRenderer();
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renderer.UpdatePreview(source);
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var first = Assert.IsType<VideoFrame>(renderer.RenderFrame(source));
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var preview = Assert.IsType<WriteableBitmap>(source.VideoImageSource);
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var pixels = new byte[first.BgraPixels.Length];
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preview.CopyPixels(pixels, first.Stride, 0);
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Assert.Equal(first.BgraPixels, pixels);
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Assert.Contains(first.BgraPixels.Where((_, index) => index % 4 == 3), alpha => alpha > 0);
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Assert.Contains(first.BgraPixels.Where((_, index) => index % 4 == 3), alpha => alpha == 0);
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renderer.UpdatePreview(source);
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Assert.Same(first, renderer.RenderFrame(source));
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Assert.Same(preview, source.VideoImageSource);
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source.TextContent = "Changed";
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renderer.UpdatePreview(source);
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Assert.NotSame(first, renderer.RenderFrame(source));
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Assert.NotSame(preview, source.VideoImageSource);
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});
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}
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}
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