[Vulkan] Honor guest depth clear state (#290)

2026-07-22 19:06:15 +08:00 · 2026-07-17 01:29:53 +02:00
parent 2129a12684
commit dabf723b3e
4 changed files with 150 additions and 19 deletions
@@ -0,0 +1,89 @@
+// Copyright (C) 2026 SharpEmu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+using SharpEmu.Libs.Agc;
+using SharpEmu.Libs.Gpu;
+using SharpEmu.Libs.VideoOut;
+using Xunit;
+
+namespace SharpEmu.Libs.Tests.VideoOut;
+
+public sealed class VulkanDepthAttachmentTests
+{
+    private static readonly GuestDepthTarget Target = new(
+        ReadAddress: 0x1000,
+        WriteAddress: 0x1000,
+        Width: 1920,
+        Height: 1080,
+        GuestFormat: 1,
+        SwizzleMode: 0,
+        ClearDepth: 1f,
+        ReadOnly: false);
+
+    [Fact]
+    public void GuestDepthTarget_AttachesForDepthWork()
+    {
+        var state = new GuestDepthState(
+            TestEnable: true,
+            WriteEnable: true,
+            CompareOp: 3);
+
+        Assert.True(VulkanVideoPresenter.ShouldAttachGuestDepth(Target, state));
+    }
+
+    [Theory]
+    [InlineData(true, false)]
+    [InlineData(false, true)]
+    public void GuestDepthTarget_AttachesForEitherDepthOperation(
+        bool testEnable,
+        bool writeEnable)
+    {
+        var state = new GuestDepthState(testEnable, writeEnable, CompareOp: 3);
+
+        Assert.True(VulkanVideoPresenter.ShouldAttachGuestDepth(Target, state));
+    }
+
+    [Fact]
+    public void GuestDepthTarget_RequiresTargetAndDepthWork()
+    {
+        var state = GuestDepthState.Default;
+
+        Assert.False(VulkanVideoPresenter.ShouldAttachGuestDepth(Target, state));
+        Assert.False(VulkanVideoPresenter.ShouldAttachGuestDepth(
+            target: null,
+            new GuestDepthState(true, false, CompareOp: 3)));
+    }
+
+    [Fact]
+    public void GuestDepthTarget_AttachesForDepthClear()
+    {
+        var state = new GuestDepthState(
+            TestEnable: false,
+            WriteEnable: false,
+            CompareOp: 7,
+            ClearEnable: true);
+
+        Assert.True(VulkanVideoPresenter.ShouldAttachGuestDepth(Target, state));
+    }
+
+    [Theory]
+    [InlineData(0x41u, true)]
+    [InlineData(0x40u, false)]
+    public void DepthState_DecodesRenderControlClearBit(
+        uint renderControl,
+        bool clearEnable)
+    {
+        var registers = new Dictionary<uint, uint>
+        {
+            [0x000] = renderControl,
+            [0x200] = 0x776,
+        };
+
+        var state = AgcExports.DecodeDepthState(registers);
+
+        Assert.True(state.TestEnable);
+        Assert.True(state.WriteEnable);
+        Assert.Equal(7u, state.CompareOp);
+        Assert.Equal(clearEnable, state.ClearEnable);
+    }
+}