[dxgi] Add functions to share per-monitor data between DXGI objects

src/dxgi/dxgi_monitor.cpp

@@ -0,0 +1,47 @@
+#include "dxgi_monitor.h"
+
+namespace dxvk {
+
+  std::mutex                                         g_monitorMutex;
+  std::unordered_map<HMONITOR, DXGI_VK_MONITOR_DATA> g_monitorData;
+
+
+  HRESULT InitMonitorData(
+          HMONITOR                hMonitor,
+    const DXGI_VK_MONITOR_DATA*   pData) {
+    if (!hMonitor || !pData)
+      return E_INVALIDARG;
+    
+    std::lock_guard<std::mutex> lock(g_monitorMutex);
+    auto result = g_monitorData.insert({ hMonitor, *pData });
+
+    return result.second ? S_OK : E_INVALIDARG;
+  }
+
+
+  HRESULT AcquireMonitorData(
+          HMONITOR                hMonitor,
+          DXGI_VK_MONITOR_DATA**  ppData) {
+    InitReturnPtr(ppData);
+
+    if (!hMonitor || !ppData)
+      return E_INVALIDARG;
+    
+    g_monitorMutex.lock();
+
+    auto entry = g_monitorData.find(hMonitor);
+    if (entry == g_monitorData.end()) {
+      g_monitorMutex.unlock();
+      return DXGI_ERROR_NOT_FOUND;
+    }
+
+    *ppData = &entry->second;
+    return S_OK;
+  }
+
+  
+  void ReleaseMonitorData() {
+    g_monitorMutex.unlock();
+  }
+  
+}

src/dxgi/dxgi_monitor.h

@@ -0,0 +1,54 @@
+#pragma once
+
+#include <mutex>
+#include <unordered_map>
+
+#include "dxgi_include.h"
+
+namespace dxvk {
+
+  class DxgiSwapChain;
+
+  /**
+   * \brief Per-monitor data
+   */
+  struct DXGI_VK_MONITOR_DATA {
+    DxgiSwapChain*        pSwapChain;
+    DXGI_FRAME_STATISTICS FrameStats;
+    DXGI_GAMMA_CONTROL    GammaCurve;
+  };
+
+
+  /**
+   * \brief Initializes monitor data
+   * 
+   * Fails if data for the given monitor already exists.
+   * \param [in] hMonitor The monitor handle
+   * \param [in] pData Initial data
+   */
+  HRESULT InitMonitorData(
+          HMONITOR                hMonitor,
+    const DXGI_VK_MONITOR_DATA*   pData);
+
+  /**
+   * \brief Retrieves and locks monitor data
+   * 
+   * Fails if no data for the given monitor exists.
+   * \param [in] hMonitor The monitor handle
+   * \param [out] Pointer to monitor data
+   * \returns S_OK on success
+   */
+  HRESULT AcquireMonitorData(
+          HMONITOR                hMonitor,
+          DXGI_VK_MONITOR_DATA**  ppData);
+  
+  /**
+   * \brief Unlocks monitor data
+   * 
+   * Must be called after each successful
+   * call to \ref AcquireMonitorData.
+   * \param [in] hMonitor The monitor handle
+   */
+  void ReleaseMonitorData();
+
+}

src/dxgi/meson.build

@@ -9,6 +9,7 @@ dxgi_src = [
   'dxgi_factory.cpp',
   'dxgi_format.cpp',
   'dxgi_main.cpp',
+  'dxgi_monitor.cpp',
   'dxgi_options.cpp',
   'dxgi_output.cpp',
   'dxgi_swapchain.cpp',