[dxgi] Hack: Report Intel cards as AMD cards by default

dxvk.conf

@@ -69,6 +69,13 @@
 # dxgi.nvapiHack = True
 
 
+# Report Intel GPUs as AMD GPUs by default. This is enabled by default
+# to work around issues with UE4 games and XeSS on Intel.
+#
+# Supported values: True, False
+
+# dxgi.intelVendorHack = True
+
 
 # Override maximum amount of device memory and shared system memory
 # reported to the application. This may fix texture streaming issues

src/dxgi/dxgi_adapter.cpp

@@ -291,6 +291,14 @@ namespace dxvk {
       deviceProp.vendorID = uint16_t(DxvkGpuVendor::Amd);
       deviceProp.deviceID = 0x67df; /* RX 480 */
     }
+
+    // Intel workaround for XeSS and Unreal Engine 4 games
+    if (options->customVendorId < 0 && options->customDeviceId < 0
+     && options->intelVendorHack && deviceProp.vendorID == uint16_t(DxvkGpuVendor::Intel)) {
+      Logger::info("DXGI: Intel vendor id workaround enabled, reporting AMD GPU");
+      deviceProp.vendorID = uint16_t(DxvkGpuVendor::Amd);
+      deviceProp.deviceID = 0x67df; /* RX 480 */
+    }
 
     // Convert device name
     std::memset(pDesc->Description, 0, sizeof(pDesc->Description));

src/dxgi/dxgi_options.cpp

@@ -79,6 +79,11 @@ namespace dxvk {
     else
       this->nvapiHack = config.getOption<bool>("dxgi.nvapiHack", true);
 
+    if (env::getEnvVar("DXVK_HIDE_INTEL_GPU") == "0")
+      this->intelVendorHack = false;
+    else
+      this->intelVendorHack = config.getOption<bool>("dxgi.intelVendorHack", true);
+
     this->enableHDR = config.getOption<bool>("dxgi.enableHDR", env::getEnvVar("DXVK_HDR") == "1");
     if (this->enableHDR && isHDRDisallowed()) {
       Logger::info("HDR was configured to be enabled, but has been force disabled as a UE4 DX11 game was detected.");

src/dxgi/dxgi_options.h

@@ -36,6 +36,9 @@ namespace dxvk {
     /// Enables nvapi workaround
     bool nvapiHack;
 
+    /// Enables Intel vendor id workaround
+    bool intelVendorHack;
+
     /// Enable HDR
     bool enableHDR;
   };