Add Shorts look preview and visual crop editor

Show opening/closing 9:16 stills from the same filtergraph, and let users drag a keep-region on a source frame to fill the crop insets.
2026-08-15 21:08:36 +02:00
parent 8a734d58d9
commit 323324d713
9 changed files with 958 additions and 12 deletions
@@ -0,0 +1,100 @@
+using AmiReel.Models;
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+
+namespace AmiReel.Tests.Models;
+
+[TestClass]
+public class SourceCropSelectionTests
+{
+    [TestMethod]
+    public void FitUniform_WiderContainer_LetterboxesHorizontally()
+    {
+        // Act
+        (double offsetX, double offsetY, double width, double height) =
+            SourceCropSelection.FitUniform(400, 200, 100, 100);
+
+        // Assert
+        Assert.AreEqual(100, offsetX);
+        Assert.AreEqual(0, offsetY);
+        Assert.AreEqual(200, width);
+        Assert.AreEqual(200, height);
+    }
+
+    [TestMethod]
+    public void FitUniform_TallerContainer_LetterboxesVertically()
+    {
+        // Act
+        (double offsetX, double offsetY, double width, double height) =
+            SourceCropSelection.FitUniform(200, 400, 100, 100);
+
+        // Assert
+        Assert.AreEqual(0, offsetX);
+        Assert.AreEqual(100, offsetY);
+        Assert.AreEqual(200, width);
+        Assert.AreEqual(200, height);
+    }
+
+    [TestMethod]
+    public void ToInsets_FullFrameSelection_ReturnsEmptyInsets()
+    {
+        // Act
+        PixelInsets insets = SourceCropSelection.ToInsets(640, 512, 640, 512, 0, 0, 640, 512);
+
+        // Assert
+        Assert.IsTrue(insets.IsEmpty);
+    }
+
+    [TestMethod]
+    public void ToInsets_CenteredSelection_ComputesAllFourEdges()
+    {
+        // Act
+        PixelInsets insets = SourceCropSelection.ToInsets(100, 100, 100, 100, 10, 20, 70, 50);
+
+        // Assert
+        Assert.AreEqual(10, insets.Left);
+        Assert.AreEqual(20, insets.Right);
+        Assert.AreEqual(20, insets.Top);
+        Assert.AreEqual(30, insets.Bottom);
+    }
+
+    [TestMethod]
+    public void ToInsets_DraggedUpAndLeft_NormalizesTheRectangle()
+    {
+        // Act
+        PixelInsets insets = SourceCropSelection.ToInsets(100, 100, 100, 100, 80, 70, -70, -50);
+
+        // Assert
+        Assert.AreEqual(10, insets.Left);
+        Assert.AreEqual(20, insets.Right);
+        Assert.AreEqual(20, insets.Top);
+        Assert.AreEqual(30, insets.Bottom);
+    }
+
+    [TestMethod]
+    public void ToDisplayRect_RoundTripsKnownInsets()
+    {
+        // Arrange
+        PixelInsets insets = new(20, 20, 10, 10);
+
+        // Act
+        (double x, double y, double width, double height) =
+            SourceCropSelection.ToDisplayRect(100, 100, 200, 200, insets);
+
+        // Assert
+        Assert.AreEqual(40, x);
+        Assert.AreEqual(20, y);
+        Assert.AreEqual(120, width);
+        Assert.AreEqual(160, height);
+    }
+
+    [TestMethod]
+    public void ClampToDisplay_OutsideBounds_ClampsToEdges()
+    {
+        // Act
+        (double x, double y) = SourceCropSelection.ClampToDisplay(-8, 90, 80, 60);
+
+        // Assert
+        Assert.AreEqual(0, x);
+        Assert.AreEqual(60, y);
+    }
+}