2 files changed, 9 insertions, 3 deletions
diff --git a/servers/rendering/shader_preprocessor.cpp b/servers/rendering/shader_preprocessor.cpp
index 3766477070..46e76fbe92 100644
--- a/servers/rendering/shader_preprocessor.cpp
+++ b/servers/rendering/shader_preprocessor.cpp
@@ -1176,7 +1176,7 @@ Error ShaderPreprocessor::preprocess(State *p_state, const String &p_code, Strin
 	return OK;
 }
 
-Error ShaderPreprocessor::preprocess(const String &p_code, const String &p_filename, String &r_result, String *r_error_text, List<FilePosition> *r_error_position, List<Region> *r_regions, HashSet<Ref<ShaderInclude>> *r_includes, List<ScriptLanguage::CodeCompletionOption> *r_completion_options, IncludeCompletionFunction p_include_completion_func) {
+Error ShaderPreprocessor::preprocess(const String &p_code, const String &p_filename, String &r_result, String *r_error_text, List<FilePosition> *r_error_position, List<Region> *r_regions, HashSet<Ref<ShaderInclude>> *r_includes, List<ScriptLanguage::CodeCompletionOption> *r_completion_options, List<ScriptLanguage::CodeCompletionOption> *r_completion_defines, IncludeCompletionFunction p_include_completion_func) {
 	State pp_state;
 	if (!p_filename.is_empty()) {
 		pp_state.current_filename = p_filename;
@@ -1198,6 +1198,13 @@ Error ShaderPreprocessor::preprocess(const String &p_code, const String &p_filen
 		*r_includes = pp_state.shader_includes;
 	}
 
+	if (r_completion_defines) {
+		for (const KeyValue<String, Define *> &E : state->defines) {
+			ScriptLanguage::CodeCompletionOption option(E.key, ScriptLanguage::CODE_COMPLETION_KIND_CONSTANT);
+			r_completion_defines->push_back(option);
+		}
+	}
+
 	if (r_completion_options) {
 		switch (pp_state.completion_type) {
 			case COMPLETION_TYPE_DIRECTIVE: {
@@ -1212,7 +1219,6 @@ Error ShaderPreprocessor::preprocess(const String &p_code, const String &p_filen
 			} break;
 			case COMPLETION_TYPE_PRAGMA: {
 				List<String> options;
-
 				ShaderPreprocessor::get_pragma_list(&options);
 
 				for (const String &E : options) {
diff --git a/servers/rendering/shader_preprocessor.h b/servers/rendering/shader_preprocessor.h
index b4e7c7199f..f1b2876891 100644
--- a/servers/rendering/shader_preprocessor.h
+++ b/servers/rendering/shader_preprocessor.h
@@ -218,7 +218,7 @@ private:
 public:
 	typedef void (*IncludeCompletionFunction)(List<ScriptLanguage::CodeCompletionOption> *);
 
-	Error preprocess(const String &p_code, const String &p_filename, String &r_result, String *r_error_text = nullptr, List<FilePosition> *r_error_position = nullptr, List<Region> *r_regions = nullptr, HashSet<Ref<ShaderInclude>> *r_includes = nullptr, List<ScriptLanguage::CodeCompletionOption> *r_completion_options = nullptr, IncludeCompletionFunction p_include_completion_func = nullptr);
+	Error preprocess(const String &p_code, const String &p_filename, String &r_result, String *r_error_text = nullptr, List<FilePosition> *r_error_position = nullptr, List<Region> *r_regions = nullptr, HashSet<Ref<ShaderInclude>> *r_includes = nullptr, List<ScriptLanguage::CodeCompletionOption> *r_completion_options = nullptr, List<ScriptLanguage::CodeCompletionOption> *r_completion_defines = nullptr, IncludeCompletionFunction p_include_completion_func = nullptr);
 
 	static void get_keyword_list(List<String> *r_keywords, bool p_include_shader_keywords, bool p_ignore_context_keywords = false);
 	static void get_pragma_list(List<String> *r_pragmas);