Implement native 0x202 color interpolation

2026-07-10 20:49:03 -04:00
parent d6d1be984e
commit 8731d6389c
13 changed files with 300 additions and 53 deletions
--- a/engine/Age.Engine.Tests/RenderObjectBlendTests.cs
+++ b/engine/Age.Engine.Tests/RenderObjectBlendTests.cs
@@ -64,6 +64,19 @@ public class RenderObjectBlendTests
        Assert.Equal(BlendKind.Alpha, ro2.Blend);
    }

+    [Fact]
+    public void Mode1_UsesArgbAlphaAsOpacityAndRgbAsMultiplicativeModulation()
+    {
+        var g = WithVisibleObject(0x100, resId: 5, colorKey: -1);
+        g.SetStaticObjectColorResolved(0x100, 1, 0x40, 0x80ff40);
+        var ro = g.SnapshotVisibleObjects().Single();
+        Assert.Equal(0x40, ro.Alpha);
+        Assert.Equal(0, ro.TintStrength);
+        Assert.Equal(0x80ff40, ro.Tint);
+        Assert.True(ro.MultiplyTint);
+        Assert.Equal(BlendKind.Alpha, ro.Blend);
+    }
+
    [Fact]
    public void ColorKey_IsCarriedThrough()
    {