Growable command buffers

Minecraft.Client/Windows64/4JLibs/inc/Render/Renderer.h

@@ -170,6 +170,23 @@ private:
     void DeleteInternalBuffer(int index);
     Renderer::Context &getContext();
     void GrowCommandBufferArrays();
+
+private:
+        void ShrinkCommandBufferArrays();
+
+        static constexpr int   kMinCommandBuffers = MAX_COMMAND_BUFFERS;  // íèæíÿÿ ãðàíèöà, íèêîãäà íå óìåíüøàåì íèæå
+        static constexpr int   kShrinkCooldownTicks = 300;  // ~5 ñåêóíä ïðè 60 òèê/ñ
+        static constexpr float kShrinkThreshold = 0.75f; // ñæèìàåì åñëè çàíÿòî < kShrinkThreshold% ñëîòîâ
+        static constexpr float kShrinkTarget = kShrinkThreshold; // ñæèìàåì äî kShrinkThreshold òåêóùåãî ðàçìåðà
+
+        int  m_shrinkCooldown;    // îáðàòíûé ñ÷¸ò÷èê — ñêîëüêî òèêîâ îñòàëîñü äî ñëåäóþùåé ïðîâåðêè
+        int  m_peakUsageSinceLastShrinkCheck; // ïèê èñïîëüçîâàíèÿ çà ïåðèîä cooldown
+
+#ifdef _DEBUG
+        DWORD m_peakCommandBuffers;
+        DWORD m_peakHandles;
+#endif
+
 public:
 
     enum eTextureSamplerFlags

Minecraft.Client/Windows64/4JLibs/inc/Render/RendererCBuff.cpp

@@ -418,9 +418,9 @@ void Renderer::CBuffTick()
 {
     EnterCriticalSection(&m_commandBufferCS);
 
+    // --- Óäàëåíèå îäíîãî óñòàðåâøåãî áóôåðà çà òèê ---
     if (m_numBuffersToDeallocate > 0)
     {
-        // Удаляем ровно один буфер за тик — чтобы не спайкать кадр
         const int totalSlots = static_cast<int>(m_commandBuffers.size());
         const int deleteIdx = totalSlots - static_cast<int>(m_numBuffersToDeallocate);
 
@@ -436,6 +436,30 @@ void Renderer::CBuffTick()
         --m_numBuffersToDeallocate;
     }
 
+    // --- Îòñëåæèâàåì ïèê èñïîëüçîâàíèÿ çà ïåðèîä ---
+    const int currentUsage = static_cast<int>(m_currentCommandBuffer);
+    if (currentUsage > m_peakUsageSinceLastShrinkCheck)
+        m_peakUsageSinceLastShrinkCheck = currentUsage;
+
+#ifdef _DEBUG
+    m_peakCommandBuffers = std::max(m_peakCommandBuffers, (DWORD)m_commandBuffers.size());
+    m_peakHandles = std::max(m_peakHandles, (DWORD)m_vertexIdxToBufferIdx.size());
+#endif
+
+    // --- Ïðîâåðêà íà ñæàòèå ðàç â kShrinkCooldownTicks òèêîâ ---
+    if (--m_shrinkCooldown <= 0)
+    {
+        m_shrinkCooldown = kShrinkCooldownTicks;
+
+        // Èñïîëüçóåì ïèê çà âåñü ïåðèîä, à íå ìîìåíòàëüíîå çíà÷åíèå —
+        // çàùèòà îò ñëó÷àéíûõ ïðîâàëîâ àêòèâíîñòè
+        const int capacityToCheck = static_cast<int>(m_commandBuffers.size());
+        if (m_peakUsageSinceLastShrinkCheck < static_cast<int>(capacityToCheck * kShrinkThreshold))
+            ShrinkCommandBufferArrays();
+
+        m_peakUsageSinceLastShrinkCheck = 0;
+    }
+
     LeaveCriticalSection(&m_commandBufferCS);
 }
 

Minecraft.Client/Windows64/4JLibs/inc/Render/RendererCore.cpp

@@ -833,6 +833,14 @@ void Renderer::Initialise(ID3D11Device *pDevice, IDXGISwapChain *pSwapChain)
     m_pDevice->CreateBuffer(&fanIndexDesc, &fanIndexData, &fanIndexBuffer);
     delete[] fanIndices;
 
+    m_shrinkCooldown = kShrinkCooldownTicks;
+    m_peakUsageSinceLastShrinkCheck = 0;
+
+#ifdef _DEBUG
+    m_peakCommandBuffers = 0;
+    m_peakHandles = 0;
+#endif
+
     InitializeCriticalSection(&Renderer::totalAllocCS);
 }
 
@@ -1075,3 +1083,46 @@ void Renderer::GrowCommandBufferArrays()
         }
     }
 }
+
+void Renderer::ShrinkCommandBufferArrays()
+{
+    // Íåëüçÿ ñæèìàòü ïîêà åñòü îæèäàþùèå óäàëåíèÿ — îíè â õâîñòå,
+    // è ïðè èçìåíåíèè ðàçìåðà íàðóøèòñÿ èõ ðàñïîëîæåíèå
+    if (m_numBuffersToDeallocate > 0)
+        return;
+
+    const int currentSize = static_cast<int>(m_commandBuffers.size());
+    const int activeCount = static_cast<int>(m_currentCommandBuffer);
+
+    // Íèêîãäà íå óìåíüøàåìñÿ íèæå ìèíèìóìà
+    if (currentSize <= kMinCommandBuffers)
+        return;
+
+    // Ïðîâåðÿåì ïîðîã: åñëè çàíÿòî >= 25% — íå òðîãàåì
+    if (activeCount >= static_cast<int>(currentSize * kShrinkThreshold))
+        return;
+
+    // Íîâûé ðàçìåð: 50% îò òåêóùåãî, íî íå ìåíüøå kMinCommandBuffers
+    // è íå ìåíüøå ÷åì íóæíî äëÿ àêòèâíûõ áóôåðîâ ñ çàïàñîì x2
+    const int newSize = max(kMinCommandBuffers, max(static_cast<int>(currentSize * kShrinkTarget), activeCount * 2));
+
+    // Åñëè ðàçíèöà íåçíà÷èòåëüíà — íå òðîãàåì
+    if (newSize >= currentSize)
+        return;
+
+    // Àêòèâíûå áóôåðû óæå â çîíå [0, m_currentCommandBuffer) — 
+    // îíè âñå âëåçàþò â newSize, ïðîñòî óñåêàåì õâîñò
+    m_commandBuffers.resize(newSize);
+    m_commandMatrices.resize(newSize);
+    m_bufferIdxToVertexIdx.resize(newSize, 0);
+    m_commandPrimitiveTypes.resize(newSize, 0);
+    m_commandVertexTypes.resize(newSize, 0);
+
+#ifdef _DEBUG
+    OutputDebugStringA(
+        ("Renderer: shrunk command buffer pool " +
+            std::to_string(currentSize) + " -> " +
+            std::to_string(newSize) + "\n").c_str()
+    );
+#endif
+}