fix: 修复叠加层不会立刻显示的问题

src/Magpie.Core/OverlayDrawer.cpp

@@ -59,6 +59,12 @@ void OverlayDrawer::Draw() noexcept {
 		return;
 	}
 
+	if (_isFirstFrame) {
+		// ImGui 的第一帧不会显示，我们连续渲染两帧
+		_isFirstFrame = false;
+		Draw();
+	}
+
 	_imguiImpl.BeginFrame();
 
 	ImGui::ShowDemoWindow();

src/Magpie.Core/OverlayDrawer.h

@@ -66,6 +66,8 @@ private:
 
 	bool _isUIVisiable = false;
 	bool _isSrcMainWnd = false;
+
+	bool _isFirstFrame = true;
 };
 
 }

src/Magpie.Core/Renderer.cpp

@@ -183,18 +183,7 @@ bool Renderer::_CreateSwapChain() noexcept {
 	return true;
 }
 
-void Renderer::Render(HCURSOR hCursor, POINT cursorPos) noexcept {
-	// 有新帧或光标改变则渲染新的帧
-	if (_lastAccessMutexKey == _sharedTextureMutexKey) {
-		if (_lastAccessMutexKey == 0 || (hCursor == _lastCursorHandle && cursorPos == _lastCursorPos)) {
-			// 第一帧尚未完成或光标没有移动
-			return;
-		}
-	}
-
-	_lastCursorHandle = hCursor;
-	_lastCursorPos = cursorPos;
-
+void Renderer::_FrontendRender() noexcept {
 	WaitForSingleObjectEx(_frameLatencyWaitableObject.get(), 1000, TRUE);
 
 	ID3D11DeviceContext4* d3dDC = _frontendResources.GetD3DDC();
@@ -228,7 +217,7 @@ void Renderer::Render(HCURSOR hCursor, POINT cursorPos) noexcept {
 			_backBuffer.get(),
 			0,
 			_destRect.left - scalingWndRect.left,
-			_destRect.top- scalingWndRect.top,
+			_destRect.top - scalingWndRect.top,
 			0,
 			_frontendSharedTexture.get(),
 			0,
@@ -247,7 +236,7 @@ void Renderer::Render(HCURSOR hCursor, POINT cursorPos) noexcept {
 	}
 
 	// 绘制光标
-	_cursorDrawer.Draw(hCursor, cursorPos);
+	_cursorDrawer.Draw(_lastCursorHandle, _lastCursorPos);
 
 	// 两个垂直同步之间允许渲染数帧，SyncInterval = 0 只呈现最新的一帧，旧帧被丢弃
 	_swapChain->Present(0, 0);
@@ -256,6 +245,21 @@ void Renderer::Render(HCURSOR hCursor, POINT cursorPos) noexcept {
 	d3dDC->DiscardView(backBufferRtv);
 }
 
+void Renderer::Render(HCURSOR hCursor, POINT cursorPos) noexcept {
+	// 有新帧或光标改变则渲染新的帧
+	if (_lastAccessMutexKey == _sharedTextureMutexKey) {
+		if (_lastAccessMutexKey == 0 || (hCursor == _lastCursorHandle && cursorPos == _lastCursorPos)) {
+			// 第一帧尚未完成或光标没有移动
+			return;
+		}
+	}
+
+	_lastCursorHandle = hCursor;
+	_lastCursorPos = cursorPos;
+
+	_FrontendRender();
+}
+
 void Renderer::ToggleOverlay() noexcept {
 	if (!_overlayDrawer) {
 		_overlayDrawer = std::make_unique<OverlayDrawer>();
@@ -271,6 +275,9 @@ void Renderer::ToggleOverlay() noexcept {
 	} else {
 		_overlayDrawer->SetUIVisibility(true);
 	}
+
+	// 立即渲染一帧
+	_FrontendRender();
 }
 
 bool Renderer::IsOverlayVisible() noexcept {

src/Magpie.Core/Renderer.h

@@ -37,6 +37,8 @@ public:
 private:
 	bool _CreateSwapChain() noexcept;
 
+	void _FrontendRender() noexcept;
+
 	void _BackendThreadProc() noexcept;
 
 	ID3D11Texture2D* _InitBackend() noexcept;

src/Magpie.Core/conanfile.txt

@@ -13,4 +13,3 @@ visual_studio
 fmt:header_only=True
 spdlog:header_only=True
 spdlog:no_exceptions=True
-