[dxvk] Add device filter

When setting DXVK_FILTER_DEVICE_NAME, only devices with a
matching device name will be reported to the application.

src/dxvk/dxvk_device_filter.cpp

@@ -0,0 +1,30 @@
+#include "dxvk_device_filter.h"
+
+namespace dxvk {
+  
+  DxvkDeviceFilter::DxvkDeviceFilter() {
+    m_matchDeviceName = env::getEnvVar(L"DXVK_FILTER_DEVICE_NAME");
+    
+    if (m_matchDeviceName.size() != 0)
+      m_flags.set(DxvkDeviceFilterFlag::MatchDeviceName);
+  }
+  
+  
+  DxvkDeviceFilter::~DxvkDeviceFilter() {
+    
+  }
+  
+  
+  bool DxvkDeviceFilter::testAdapter(
+    const Rc<DxvkAdapter>&  adapter) const {
+    const auto& deviceProps = adapter->deviceProperties();
+    
+    if (m_flags.test(DxvkDeviceFilterFlag::MatchDeviceName)) {
+      if (deviceProps.deviceName != m_matchDeviceName)
+        return false;
+    }
+      
+    return true;
+  }
+  
+}

src/dxvk/dxvk_device_filter.h

@@ -0,0 +1,53 @@
+#pragma once
+
+#include "dxvk_adapter.h"
+
+namespace dxvk {
+  
+  /**
+   * \brief Device filter flags
+   * 
+   * The device filter flags specify which device
+   * properties are considered when testing adapters.
+   * If no flags are set, all devices pass the test.
+   */
+  enum class DxvkDeviceFilterFlag {
+    MatchDeviceName   = 0,
+  };
+  
+  using DxvkDeviceFilterFlags = Flags<DxvkDeviceFilterFlag>;
+  
+  
+  /**
+   * \brief DXVK device filter
+   * 
+   * Used to select specific Vulkan devices to use
+   * with DXVK. This may be useful for games which
+   * do not offer an option to select the correct
+   * device.
+   */
+  class DxvkDeviceFilter {
+    
+  public:
+    
+    DxvkDeviceFilter();
+    ~DxvkDeviceFilter();
+    
+    /**
+     * \brief Tests an adapter
+     * 
+     * \param [in] adapter Adapter handle
+     * \returns \c true if the test passes
+     */
+    bool testAdapter(
+      const Rc<DxvkAdapter>&  adapter) const;
+    
+  private:
+    
+    DxvkDeviceFilterFlags m_flags;
+    
+    std::string m_matchDeviceName;
+    
+  };
+  
+}

src/dxvk/dxvk_instance.cpp

@@ -88,6 +88,8 @@ namespace dxvk {
   
   
   std::vector<Rc<DxvkAdapter>> DxvkInstance::queryAdapters() {
+    DxvkDeviceFilter filter;
+    
     uint32_t numAdapters = 0;
     if (m_vki->vkEnumeratePhysicalDevices(m_vki->instance(), &numAdapters, nullptr) != VK_SUCCESS)
       throw DxvkError("DxvkInstance::enumAdapters: Failed to enumerate adapters");
@@ -97,8 +99,12 @@ namespace dxvk {
       throw DxvkError("DxvkInstance::enumAdapters: Failed to enumerate adapters");
     
     std::vector<Rc<DxvkAdapter>> result;
-    for (uint32_t i = 0; i < numAdapters; i++)
+    for (uint32_t i = 0; i < numAdapters; i++) {
-      result.push_back(new DxvkAdapter(this, adapters[i]));
+      Rc<DxvkAdapter> adapter = new DxvkAdapter(this, adapters[i]);
+      
+      if (filter.testAdapter(adapter))
+        result.push_back(adapter);
+    }
     
     std::sort(result.begin(), result.end(),
       [this] (const Rc<DxvkAdapter>& a, const Rc<DxvkAdapter>& b) -> bool {
@@ -106,6 +112,11 @@ namespace dxvk {
             && b->deviceProperties().deviceType != VK_PHYSICAL_DEVICE_TYPE_DISCRETE_GPU;
       });
     
+    if (result.size() == 0) {
+      Logger::warn("DXVK: No adapters found. Please check your "
+                   "device filter settings and Vulkan setup.");
+    }
+    
     return result;
   }
   

src/dxvk/dxvk_instance.h

@@ -4,6 +4,7 @@
 
 #include "dxvk_adapter.h"
 #include "dxvk_device.h"
+#include "dxvk_device_filter.h"
 #include "dxvk_openvr.h"
 
 namespace dxvk {

src/dxvk/meson.build

@@ -41,6 +41,7 @@ dxvk_src = files([
   'dxvk_data.cpp',
   'dxvk_descriptor.cpp',
   'dxvk_device.cpp',
+  'dxvk_device_filter.cpp',
   'dxvk_extensions.cpp',
   'dxvk_event.cpp',
   'dxvk_event_tracker.cpp',