added custom driver option in settings

android/app/src/main/cpp/xemu_android.cpp

@@ -805,6 +805,18 @@ static SetupFiles SyncSetupFiles() {
   int displayMode = GetPrefInt(env, activity, "setting_display_mode", 0);
   xemu_android_set_display_mode_setting(displayMode);
 
+  const std::string vulkanDriverUri = GetPrefString(env, activity, "setting_vulkan_driver_uri");
+  if (!vulkanDriverUri.empty()) {
+    std::string driverPath = base + "/vulkan_driver.so";
+    if (CopyUriToPath(env, activity, vulkanDriverUri, driverPath)) {
+      chmod(driverPath.c_str(), 0755);
+      setenv("XEMU_VULKAN_DRIVER", driverPath.c_str(), 1);
+      LogInfoFmt("Custom Vulkan driver staged: %s", driverPath.c_str());
+    } else {
+      LogError("Failed to copy custom Vulkan driver; using system default");
+    }
+  }
+
   out.config_path = base + "/xemu.toml";
   WriteConfigToml(out.config_path, out.mcpx, out.flash, out.hdd, out.dvd, out.eeprom, emuSettings);
   LogInfoFmt("SyncSetupFiles: config %s", out.config_path.c_str());

android/app/src/main/java/com/izzy2lost/x1box/SettingsActivity.kt

@@ -1,8 +1,12 @@
 package com.izzy2lost.x1box
 
 import android.content.Context
+import android.net.Uri
 import android.os.Bundle
+import android.provider.OpenableColumns
+import android.widget.TextView
 import android.widget.Toast
+import androidx.activity.result.contract.ActivityResultContracts
 import androidx.appcompat.app.AppCompatActivity
 import com.google.android.material.button.MaterialButton
 import com.google.android.material.button.MaterialButtonToggleGroup
@@ -12,6 +16,21 @@ class SettingsActivity : AppCompatActivity() {
 
   private val prefs by lazy { getSharedPreferences("x1box_prefs", Context.MODE_PRIVATE) }
 
+  private var pendingVulkanUri: String? = null
+  private var pendingVulkanName: String? = null
+  private var clearVulkan = false
+
+  private lateinit var tvVulkanDriverName: TextView
+
+  private val pickDriver =
+    registerForActivityResult(ActivityResultContracts.OpenDocument()) { uri: Uri? ->
+      uri ?: return@registerForActivityResult
+      pendingVulkanUri  = uri.toString()
+      pendingVulkanName = getFileName(uri) ?: uri.lastPathSegment ?: "custom_driver.so"
+      clearVulkan = false
+      tvVulkanDriverName.text = pendingVulkanName
+    }
+
   override fun onCreate(savedInstanceState: Bundle?) {
     super.onCreate(savedInstanceState)
     setContentView(R.layout.activity_settings)
@@ -30,6 +49,9 @@ class SettingsActivity : AppCompatActivity() {
     val switchFpu         = findViewById<MaterialSwitch>(R.id.switch_hard_fpu)
     val toggleAudioDriver = findViewById<MaterialButtonToggleGroup>(R.id.toggle_audio_driver)
     val btnSave           = findViewById<MaterialButton>(R.id.btn_settings_save)
+    tvVulkanDriverName    = findViewById(R.id.tv_vulkan_driver_name)
+    val btnVulkanBrowse   = findViewById<MaterialButton>(R.id.btn_vulkan_browse)
+    val btnVulkanClear    = findViewById<MaterialButton>(R.id.btn_vulkan_clear)
 
     // Load current values
     val scale = prefs.getInt("setting_surface_scale", 1)
@@ -46,6 +68,10 @@ class SettingsActivity : AppCompatActivity() {
       else -> toggleDisplayMode.check(R.id.btn_display_stretch)
     }
 
+    tvVulkanDriverName.text =
+      prefs.getString("setting_vulkan_driver_name", null)
+        ?: getString(R.string.settings_vulkan_driver_none)
+
     val tcgThread = prefs.getString("setting_tcg_thread", "multi") ?: "multi"
     if (tcgThread == "single") {
       toggleThread.check(R.id.btn_thread_single)
@@ -65,6 +91,17 @@ class SettingsActivity : AppCompatActivity() {
       else      -> toggleAudioDriver.check(R.id.btn_audio_opensles)
     }
 
+    btnVulkanBrowse.setOnClickListener {
+      pickDriver.launch(arrayOf("*/*"))
+    }
+
+    btnVulkanClear.setOnClickListener {
+      pendingVulkanUri  = null
+      pendingVulkanName = null
+      clearVulkan = true
+      tvVulkanDriverName.text = getString(R.string.settings_vulkan_driver_none)
+    }
+
     btnSave.setOnClickListener {
       val selectedDisplayMode = when (toggleDisplayMode.checkedButtonId) {
         R.id.btn_display_4_3  -> 1
@@ -86,7 +123,7 @@ class SettingsActivity : AppCompatActivity() {
         else                     -> "openslES"
       }
 
-      prefs.edit()
+      val edit = prefs.edit()
         .putInt("setting_display_mode", selectedDisplayMode)
         .putInt("setting_surface_scale", selectedScale)
         .putString("setting_tcg_thread", selectedThread)
@@ -95,10 +132,27 @@ class SettingsActivity : AppCompatActivity() {
         .putBoolean("setting_cache_shaders", switchShaders.isChecked)
         .putBoolean("setting_hard_fpu", switchFpu.isChecked)
         .putString("setting_audio_driver", selectedAudioDriver)
-        .apply()
+
+      when {
+        clearVulkan -> edit
+          .remove("setting_vulkan_driver_uri")
+          .remove("setting_vulkan_driver_name")
+        pendingVulkanUri != null -> edit
+          .putString("setting_vulkan_driver_uri", pendingVulkanUri)
+          .putString("setting_vulkan_driver_name", pendingVulkanName)
+      }
+
+      edit.apply()
 
       Toast.makeText(this, R.string.settings_saved, Toast.LENGTH_SHORT).show()
       finish()
     }
   }
+
+  private fun getFileName(uri: Uri): String? {
+    return contentResolver.query(uri, null, null, null, null)?.use { cursor ->
+      val col = cursor.getColumnIndex(OpenableColumns.DISPLAY_NAME)
+      if (col >= 0 && cursor.moveToFirst()) cursor.getString(col) else null
+    }
+  }
 }

android/app/src/main/res/layout/activity_settings.xml

@@ -140,6 +140,59 @@
 
           </com.google.android.material.button.MaterialButtonToggleGroup>
 
+          <!-- ── VULKAN DRIVER ── -->
+          <TextView
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="8dp"
+            android:layout_marginBottom="8dp"
+            android:text="@string/settings_section_vulkan_driver"
+            android:textAppearance="@style/TextAppearance.Material3.LabelLarge"
+            android:textColor="@color/xemu_green" />
+
+          <TextView
+            android:id="@+id/tv_vulkan_driver_name"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginBottom="8dp"
+            android:textAppearance="@style/TextAppearance.Material3.BodyMedium"
+            android:textColor="@color/xemu_text_muted" />
+
+          <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginBottom="4dp"
+            android:orientation="horizontal"
+            android:weightSum="2">
+
+            <com.google.android.material.button.MaterialButton
+              android:id="@+id/btn_vulkan_browse"
+              style="?attr/materialButtonOutlinedStyle"
+              android:layout_width="0dp"
+              android:layout_height="wrap_content"
+              android:layout_marginEnd="4dp"
+              android:layout_weight="1"
+              android:text="@string/settings_vulkan_driver_browse" />
+
+            <com.google.android.material.button.MaterialButton
+              android:id="@+id/btn_vulkan_clear"
+              style="?attr/materialButtonOutlinedStyle"
+              android:layout_width="0dp"
+              android:layout_height="wrap_content"
+              android:layout_marginStart="4dp"
+              android:layout_weight="1"
+              android:text="@string/settings_vulkan_driver_clear" />
+
+          </LinearLayout>
+
+          <TextView
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginBottom="12dp"
+            android:text="@string/settings_vulkan_driver_hint"
+            android:textAppearance="@style/TextAppearance.Material3.BodySmall"
+            android:textColor="@color/xemu_text_muted" />
+
           <!-- ── PERFORMANCE ── -->
           <TextView
             android:layout_width="match_parent"

android/app/src/main/res/values/strings.xml

@@ -80,6 +80,11 @@
   <string name="settings_save">Save</string>
 
   <string name="settings_section_display">Display</string>
+  <string name="settings_section_vulkan_driver">Custom Vulkan Driver</string>
+  <string name="settings_vulkan_driver_none">System Default</string>
+  <string name="settings_vulkan_driver_browse">Browse…</string>
+  <string name="settings_vulkan_driver_clear">Clear</string>
+  <string name="settings_vulkan_driver_hint">For Adreno GPUs with Turnip/Mesa. Restart required.</string>
   <string name="settings_display_mode">Aspect Ratio</string>
   <string name="settings_display_mode_stretch">Stretch</string>
   <string name="settings_display_mode_4_3">4:3</string>

hw/xbox/nv2a/pgraph/vk/instance.c

@@ -24,9 +24,38 @@
 
 #ifdef __ANDROID__
 #include <android/log.h>
+#include <dlfcn.h>
 #endif
 #include <volk.h>
 
+#ifdef __ANDROID__
+static void *g_custom_vk_handle = NULL;
+
+static bool android_try_load_custom_vulkan(void)
+{
+    const char *path = getenv("XEMU_VULKAN_DRIVER");
+    if (!path || path[0] == '\0') {
+        return false;
+    }
+    g_custom_vk_handle = dlopen(path, RTLD_NOW | RTLD_LOCAL);
+    if (!g_custom_vk_handle) {
+        fprintf(stderr, "Custom Vulkan driver dlopen failed: %s\n", dlerror());
+        return false;
+    }
+    PFN_vkGetInstanceProcAddr proc =
+        (PFN_vkGetInstanceProcAddr)dlsym(g_custom_vk_handle, "vkGetInstanceProcAddr");
+    if (!proc) {
+        fprintf(stderr, "Custom Vulkan driver: vkGetInstanceProcAddr not found\n");
+        dlclose(g_custom_vk_handle);
+        g_custom_vk_handle = NULL;
+        return false;
+    }
+    volkInitializeCustom(proc);
+    fprintf(stderr, "Custom Vulkan driver loaded: %s\n", path);
+    return true;
+}
+#endif
+
 #define VkExtensionPropertiesArray GArray
 #define StringArray GArray
 
@@ -154,7 +183,15 @@ static bool create_instance(PGRAPHState *pg, Error **errp)
     PGRAPHVkState *r = pg->vk_renderer_state;
     VkResult result;
 
+#ifdef __ANDROID__
+    if (!android_try_load_custom_vulkan()) {
+        result = volkInitialize();
+    } else {
+        result = VK_SUCCESS;
+    }
+#else
     result = volkInitialize();
+#endif
     if (result != VK_SUCCESS) {
         error_setg(errp, "volkInitialize failed");
         return false;