2 files changed, 18 insertions, 0 deletions
diff --git a/core/os/os.cpp b/core/os/os.cpp
index 86469852e3..ef7d860d19 100644
--- a/core/os/os.cpp
+++ b/core/os/os.cpp
@@ -553,6 +553,16 @@ void OS::add_frame_delay(bool p_can_draw) {
 	}
 }
 
+OS::PreferredTextureFormat OS::get_preferred_texture_format() const {
+#if defined(__arm__) || defined(__aarch64__) || defined(_M_ARM) || defined(_M_ARM64)
+	return PREFERRED_TEXTURE_FORMAT_ETC2_ASTC; // By rule, ARM hardware uses ETC texture compression.
+#elif defined(__x86_64__) || defined(_M_X64) || defined(i386) || defined(__i386__) || defined(__i386) || defined(_M_IX86)
+	return PREFERRED_TEXTURE_FORMAT_S3TC_BPTC; // By rule, X86 hardware prefers S3TC and derivatives.
+#else
+	return PREFERRED_TEXTURE_FORMAT_S3TC_BPTC; // Override in platform if needed.
+#endif
+}
+
 OS::OS() {
 	singleton = this;
 
diff --git a/core/os/os.h b/core/os/os.h
index 436a83eae3..d77890d89d 100644
--- a/core/os/os.h
+++ b/core/os/os.h
@@ -290,6 +290,14 @@ public:
 	virtual Vector<String> get_granted_permissions() const { return Vector<String>(); }
 
 	virtual void process_and_drop_events() {}
+
+	enum PreferredTextureFormat {
+		PREFERRED_TEXTURE_FORMAT_S3TC_BPTC,
+		PREFERRED_TEXTURE_FORMAT_ETC2_ASTC
+	};
+
+	virtual PreferredTextureFormat get_preferred_texture_format() const;
+
 	OS();
 	virtual ~OS();
 };