Fix fallbacks to OpenGL

2 files changed, 27 insertions, 10 deletions

diff --git a/platform/android/display_server_android.cpp b/platform/android/display_server_android.cpp
index e3ee1dd631..c269f4d167 100644
--- a/platform/android/display_server_android.cpp
+++ b/platform/android/display_server_android.cpp
@@ -604,12 +604,6 @@ DisplayServerAndroid::DisplayServerAndroid(const String &p_rendering_driver, Dis
 
 	native_menu = memnew(NativeMenu);
 
-#if defined(GLES3_ENABLED)
-	if (rendering_driver == "opengl3") {
-		RasterizerGLES3::make_current(false);
-	}
-#endif
-
 #if defined(RD_ENABLED)
 	rendering_context = nullptr;
 	rendering_device = nullptr;
@@ -624,19 +618,24 @@ DisplayServerAndroid::DisplayServerAndroid(const String &p_rendering_driver, Dis
 		if (rendering_context->initialize() != OK) {
 			memdelete(rendering_context);
 			rendering_context = nullptr;
+#if defined(GLES3_ENABLED)
 			bool fallback_to_opengl3 = GLOBAL_GET("rendering/rendering_device/fallback_to_opengl3");
 			if (fallback_to_opengl3 && rendering_driver != "opengl3") {
 				WARN_PRINT("Your device seem not to support Vulkan, switching to OpenGL 3.");
 				rendering_driver = "opengl3";
 				OS::get_singleton()->set_current_rendering_method("gl_compatibility");
 				OS::get_singleton()->set_current_rendering_driver_name(rendering_driver);
-			} else {
+			} else
+#endif
+			{
 				ERR_PRINT(vformat("Failed to initialize %s context", rendering_driver));
 				r_error = ERR_UNAVAILABLE;
 				return;
 			}
 		}
+	}
 
+	if (rendering_context) {
 		union {
 #ifdef VULKAN_ENABLED
 			RenderingContextDriverVulkanAndroid::WindowPlatformData vulkan;
@@ -676,6 +675,12 @@ DisplayServerAndroid::DisplayServerAndroid(const String &p_rendering_driver, Dis
 	}
 #endif
 
+#if defined(GLES3_ENABLED)
+	if (rendering_driver == "opengl3") {
+		RasterizerGLES3::make_current(false);
+	}
+#endif
+
 	Input::get_singleton()->set_event_dispatch_function(_dispatch_input_events);
 
 	r_error = OK;
diff --git a/platform/android/java/lib/src/org/godotengine/godot/Godot.kt b/platform/android/java/lib/src/org/godotengine/godot/Godot.kt
index 567b134234..61c027d3ee 100644
--- a/platform/android/java/lib/src/org/godotengine/godot/Godot.kt
+++ b/platform/android/java/lib/src/org/godotengine/godot/Godot.kt
@@ -477,12 +477,17 @@ class Godot(private val context: Context) {
 			// ...add to FrameLayout
 			containerLayout?.addView(editText)
 			renderView = if (usesVulkan()) {
-				if (!meetsVulkanRequirements(activity.packageManager)) {
+				if (meetsVulkanRequirements(activity.packageManager)) {
+					GodotVulkanRenderView(host, this, godotInputHandler)
+				} else if (canFallbackToOpenGL()) {
+					// Fallback to OpenGl.
+					GodotGLRenderView(host, this, godotInputHandler, xrMode, useDebugOpengl)
+				} else {
 					throw IllegalStateException(activity.getString(R.string.error_missing_vulkan_requirements_message))
 				}
-				GodotVulkanRenderView(host, this, godotInputHandler)
+
 			} else {
-				// Fallback to openGl
+				// Fallback to OpenGl.
 				GodotGLRenderView(host, this, godotInputHandler, xrMode, useDebugOpengl)
 			}
 
@@ -817,6 +822,13 @@ class Godot(private val context: Context) {
 	}
 
 	/**
+	 * Returns true if can fallback to OpenGL.
+	 */
+	private fun canFallbackToOpenGL(): Boolean {
+		return java.lang.Boolean.parseBoolean(GodotLib.getGlobal("rendering/rendering_device/fallback_to_opengl3"))
+	}
+
+	/**
 	 * Returns true if the device meets the base requirements for Vulkan support, false otherwise.
 	 */
 	private fun meetsVulkanRequirements(packageManager: PackageManager?): Boolean {