Create GDExtension clases for PhysicsServer3D

* Allows creating a GDExtension based 3D Physics Server (for Bullet, PhysX, etc. support)
* Some changes on native struct binding for PhysicsServer

This allows a 3D Physics server created entirely from GDExtension. Once it works, the idea is to port the 2D one to it.

3 files changed, 15 insertions, 18 deletions

diff --git a/core/extension/extension_api_dump.cpp b/core/extension/extension_api_dump.cpp
index 3687e4f7e5..31af28b783 100644
--- a/core/extension/extension_api_dump.cpp
+++ b/core/extension/extension_api_dump.cpp
@@ -841,27 +841,16 @@ Dictionary NativeExtensionAPIDump::generate_extension_api() {
 	{
 		Array native_structures;
 
-		// AudioStream structures
-		{
-			Dictionary d;
-			d["name"] = "AudioFrame";
-			d["format"] = "float left,float right";
+		List<StringName> native_structs;
+		ClassDB::get_native_struct_list(&native_structs);
+		native_structs.sort_custom<StringName::AlphCompare>();
 
-			native_structures.push_back(d);
-		}
+		for (const StringName &E : native_structs) {
+			String code = ClassDB::get_native_struct_code(E);
 
-		// TextServer structures
-		{
-			Dictionary d;
-			d["name"] = "Glyph";
-			d["format"] = "int start,int end,uint8_t count,uint8_t repeat,uint16_t flags,float x_off,float y_off,float advance,RID font_rid,int font_size,int32_t index";
-
-			native_structures.push_back(d);
-		}
-		{
 			Dictionary d;
-			d["name"] = "CaretInfo";
-			d["format"] = "Rect2 leading_caret,Rect2 trailing_caret,TextServer::Direction leading_direction,TextServer::Direction trailing_direction";
+			d["name"] = String(E);
+			d["format"] = code;
 
 			native_structures.push_back(d);
 		}
diff --git a/core/extension/gdnative_interface.cpp b/core/extension/gdnative_interface.cpp
index d9ec42dc9d..d0461611ec 100644
--- a/core/extension/gdnative_interface.cpp
+++ b/core/extension/gdnative_interface.cpp
@@ -60,6 +60,10 @@ static void gdnative_print_script_error(const char *p_description, const char *p
 	_err_print_error(p_function, p_file, p_line, p_description, false, ERR_HANDLER_SCRIPT);
 }
 
+uint64_t gdnative_get_native_struct_size(const char *p_name) {
+	return ClassDB::get_native_struct_size(p_name);
+}
+
 // Variant functions
 
 static void gdnative_variant_new_copy(GDNativeVariantPtr r_dest, const GDNativeVariantPtr p_src) {
@@ -902,6 +906,8 @@ void gdnative_setup_interface(GDNativeInterface *p_interface) {
 	gdni.print_warning = gdnative_print_warning;
 	gdni.print_script_error = gdnative_print_script_error;
 
+	gdni.get_native_struct_size = gdnative_get_native_struct_size;
+
 	/* GODOT VARIANT */
 
 	// variant general
diff --git a/core/extension/gdnative_interface.h b/core/extension/gdnative_interface.h
index 76e87eaf23..cc2957ec56 100644
--- a/core/extension/gdnative_interface.h
+++ b/core/extension/gdnative_interface.h
@@ -306,6 +306,8 @@ typedef struct {
 	void (*print_warning)(const char *p_description, const char *p_function, const char *p_file, int32_t p_line);
 	void (*print_script_error)(const char *p_description, const char *p_function, const char *p_file, int32_t p_line);
 
+	uint64_t (*get_native_struct_size)(const char *p_name);
+
 	/* GODOT VARIANT */
 
 	/* variant general */