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feat(a2b): promote create/set/draw-texture to IHost methods (trace parity kept)

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Runtime finding: SC0000's bg is a slot-0 full-screen slideshow (res 0x23 first), not the
static-path res 0x21. Target corrected to 0x23. CaptureHost/CountHost no-op the new methods.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
This commit is contained in:
gamer147
2026-07-06 15:49:07 -04:00
parent ef2cd03af2
commit d2d798bbac
5 changed files with 50 additions and 0 deletions
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35
engine/Age.Engine.Tests/TextureOpsTests.cs Normal file
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@@ -0,0 +1,35 @@
using System.Collections.Generic;
using Age.Engine.Hosting;
using Age.Engine.Sys4;
using Age.Engine.Vm;
using Xunit;
public class TextureOpsTests
{
private sealed class RecHost : IHost
{
public List<(long resId, int slot)> Sets = new();
public List<(int slot, int w, int h)> Draws = new();
public int Creates;
public void ShowText(int o, string t) { }
public void CallScript(long id) { }
public void OnStub(int op) { }
public void WaitForInput() { }
public void CreateTexture(int slot, int w, int h) => Creates++;
public void SetTexture(long resId, int slot) => Sets.Add((resId, slot));
public void DrawTexture(int slot, int x, int y, int w, int h) => Draws.Add((slot, w, h));
}
[Fact]
public void SC0000FiresTextureOpsWithSlot0FullScreenSlideshow()
{
var table = OpcodeTableJson.Load(Paths.OpcodesJson);
var script = Sys4Loader.Load(Paths.Scripts()["SC0000.BIN"], table);
var host = new RecHost();
new VirtualMachine(script, table, host).Run();
Assert.True(host.Creates > 0, "create-texture should fire");
// The intro loads a sequence of full-screen images into slot 0; res 0x23 is the first bg.
Assert.Contains(host.Sets, s => s.resId == 0x23 && s.slot == 0);
Assert.Contains(host.Draws, d => d.slot == 0 && d.w == 0x320 && d.h == 0x258);
}
}

3
engine/Age.Engine.Tests/WaitForInputTests.cs
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@@ -14,6 +14,9 @@ public class WaitForInputTests
public void CallScript(long id) { }
public void OnStub(int opcode) { }
public void WaitForInput() => Waits++;
public void CreateTexture(int slot, int w, int h) { }
public void SetTexture(long resId, int slot) { }
public void DrawTexture(int slot, int x, int y, int w, int h) { }
}
[Fact]

3
engine/Age.Engine/Hosting/CaptureHost.cs
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@@ -8,4 +8,7 @@ public sealed class CaptureHost : IHost
public void CallScript(long id) => CallScriptCount++;
public void OnStub(int opcode) { Stubs.TryGetValue(opcode, out var c); Stubs[opcode] = c + 1; }
public void WaitForInput() { }
public void CreateTexture(int slot, int width, int height) { }
public void SetTexture(long resourceId, int slot) { }
public void DrawTexture(int slot, int x, int y, int width, int height) { }
}

3
engine/Age.Engine/Hosting/IHost.cs
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@@ -5,4 +5,7 @@ public interface IHost
void CallScript(long id);
void OnStub(int opcode);
void WaitForInput();
void CreateTexture(int slot, int width, int height);
void SetTexture(long resourceId, int slot);
void DrawTexture(int slot, int x, int y, int width, int height);
}

6
engine/Age.Engine/Vm/VirtualMachine.cs
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@@ -168,6 +168,12 @@ public sealed class VirtualMachine
case "end-text-line": case "set-font":
case "comment": case "display-furigana": case "dev_ukn":
return pc + 1;
case "create-texture":
_host.CreateTexture((int)Read(a[0]), (int)Read(a[1]), (int)Read(a[2])); return pc + 1;
case "set-texture":
_host.SetTexture(Read(a[0]), (int)Read(a[1])); return pc + 1;
case "draw-texture":
_host.DrawTexture((int)Read(a[1]), (int)Read(a[2]), (int)Read(a[3]), (int)Read(a[4]), (int)Read(a[5])); return pc + 1;
default:
_host.OnStub(op); return pc + 1;
}