88 lines
3.4 KiB
C#
88 lines
3.4 KiB
C#
using System.Linq;
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using Age.Engine.Model;
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using Xunit;
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public class RenderObjectBlendTests
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{
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[Fact]
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public void NegativeColorOperands_PreserveCurrentStaticColor()
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{
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var g = new GfxState();
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g.SetObjectColor(0x100, GfxState.PackColor(0, 0xffffff));
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g.SetObjectColorResolved(0x100, -1, -1);
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Assert.Equal(GfxState.PackColor(0, 0xffffff), g.TryGet(0x100)!.Color);
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}
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[Fact]
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public void TransitionColorMode_TreatsWhiteAsIdentityAndAlphaAsOpacity()
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{
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var g = new GfxState();
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g.SetSurface(4, 1, -1);
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g.BindDraw(0x100, 4, 0, 0, 1, 1, 0, 0);
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g.SetStaticObjectColorResolved(0x100, 2, -1, -1);
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var rendered = g.SnapshotVisibleObjects().Single();
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Assert.Equal(255, rendered.Alpha);
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Assert.Equal(0, rendered.TintStrength);
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}
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// Make a visible textured object bound to a slot that has a surface, so it appears in the snapshot.
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private static GfxState WithVisibleObject(long handle, long resId, long colorKey)
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{
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var g = new GfxState();
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g.SetSurface(1, resId, colorKey);
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g.BindDraw(handle, 1, 0, 0, 10, 10, 0, 0); // draw-texture: slot 1, 10x10 at (0,0), visible
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return g;
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}
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[Fact]
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public void ObjectWithoutColor_ResolvesOpaqueNoTint()
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{
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var g = WithVisibleObject(0x100, resId: 5, colorKey: -1);
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var ro = g.SnapshotVisibleObjects().Single();
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Assert.Equal(255, ro.Alpha); // opaque
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Assert.Equal(0, ro.TintStrength); // no tint
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Assert.Equal(0xFFFFFF, ro.Tint);
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Assert.Equal(BlendKind.Opaque, ro.Blend);
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}
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[Fact]
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public void DrawColor_0x203_IsTintStrength_ObjectStaysOpaque()
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{
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// Op 0x203/0x202 alpha is TINT-BLEND STRENGTH, not object opacity (evidence: a CG drawn with
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// (alpha=0, color=white) must stay fully OPAQUE + untinted, not vanish). Root cause of the grey-BG.
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var g = WithVisibleObject(0x100, resId: 5, colorKey: -1);
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g.SetObjectColor(0x100, GfxState.PackColor(0x00, 0xFFFFFF)); // "no tint" — the grey-BG case
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var ro = g.SnapshotVisibleObjects().Single();
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Assert.Equal(255, ro.Alpha); // OBJECT STAYS OPAQUE (was wrongly 0 -> invisible)
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Assert.Equal(0, ro.TintStrength); // zero tint strength
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g.SetObjectColor(0x100, GfxState.PackColor(0x80, 0x102030)); // half-strength tint toward 0x102030
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var ro2 = g.SnapshotVisibleObjects().Single();
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Assert.Equal(255, ro2.Alpha); // still opaque
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Assert.Equal(0x80, ro2.TintStrength); // strength from the alpha byte
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Assert.Equal(0x102030, ro2.Tint);
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Assert.Equal(BlendKind.Alpha, ro2.Blend);
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}
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[Fact]
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public void Mode1_UsesArgbAlphaAsOpacityAndRgbAsMultiplicativeModulation()
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{
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var g = WithVisibleObject(0x100, resId: 5, colorKey: -1);
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g.SetStaticObjectColorResolved(0x100, 1, 0x40, 0x80ff40);
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var ro = g.SnapshotVisibleObjects().Single();
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Assert.Equal(0x40, ro.Alpha);
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Assert.Equal(0, ro.TintStrength);
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Assert.Equal(0x80ff40, ro.Tint);
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Assert.True(ro.MultiplyTint);
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Assert.Equal(BlendKind.Alpha, ro.Blend);
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}
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[Fact]
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public void ColorKey_IsCarriedThrough()
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{
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var g = WithVisibleObject(0x100, resId: 5, colorKey: 0x000000); // key black
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var ro = g.SnapshotVisibleObjects().Single();
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Assert.Equal(0x000000, ro.ColorKey);
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}
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}
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