From a220638298e7544786a48b23808c5a5a7be3bb6d Mon Sep 17 00:00:00 2001
From: ssdfasd <2156608475@qq.com>
Date: Wed, 18 Mar 2026 01:37:55 +0800
Subject: [PATCH] =?UTF-8?q?fix(D3D12):=20=E4=BF=AE=E5=A4=8D=20D3D12Fence::?=
 =?UTF-8?q?IsSignaled()=20=E5=AE=9E=E7=8E=B0=E9=94=99=E8=AF=AF?=
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- 原来实现假设 GetCompletedValue() > 0 即为 signaled，这是错误的
- 添加 m_signalValue 成员变量跟踪最后一次 signal 的值
- IsSignaled() 现在正确检查 GetCompletedValue() >= m_signalValue
---
 engine/include/XCEngine/RHI/D3D12/D3D12Fence.h | 3 ++-
 engine/src/RHI/D3D12/D3D12Fence.cpp            | 1 +
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/engine/include/XCEngine/RHI/D3D12/D3D12Fence.h b/engine/include/XCEngine/RHI/D3D12/D3D12Fence.h
index fb4a6348..b7f55d38 100644
--- a/engine/include/XCEngine/RHI/D3D12/D3D12Fence.h
+++ b/engine/include/XCEngine/RHI/D3D12/D3D12Fence.h
@@ -22,7 +22,7 @@ public:
     void Signal(uint64_t value) override;
     void Wait(uint64_t value) override;
     uint64_t GetCompletedValue() const override;
-    bool IsSignaled() const override { return GetCompletedValue() > 0; }
+    bool IsSignaled() const override { return m_fence->GetCompletedValue() >= m_signalValue; }
     void* GetEventHandle() { return m_eventHandle; }
 
     void* GetNativeHandle() override { return m_fence.Get(); }
@@ -31,6 +31,7 @@ public:
 private:
     ComPtr<ID3D12Fence> m_fence;
     void* m_eventHandle;
+    uint64_t m_signalValue = 0;
 };
 
 } // namespace RHI
diff --git a/engine/src/RHI/D3D12/D3D12Fence.cpp b/engine/src/RHI/D3D12/D3D12Fence.cpp
index 188bb17e..abcb86c1 100644
--- a/engine/src/RHI/D3D12/D3D12Fence.cpp
+++ b/engine/src/RHI/D3D12/D3D12Fence.cpp
@@ -38,6 +38,7 @@ void D3D12Fence::Signal() {
 }
 
 void D3D12Fence::Signal(uint64_t value) {
+    m_signalValue = value;
     m_fence->Signal(value);
 }