5 files changed, 45 insertions, 25 deletions

diff --git a/core/io/config_file.cpp b/core/io/config_file.cpp
index 015c1f0d90..10f68f3cef 100644
--- a/core/io/config_file.cpp
+++ b/core/io/config_file.cpp
@@ -295,6 +295,9 @@ Error ConfigFile::_parse(const String &p_path, VariantParser::Stream *p_stream)
 	return OK;
 }
 
+void ConfigFile::clear() {
+	values.clear();
+}
 void ConfigFile::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("set_value", "section", "key", "value"), &ConfigFile::set_value);
 	ClassDB::bind_method(D_METHOD("get_value", "section", "key", "default"), &ConfigFile::get_value, DEFVAL(Variant()));
@@ -317,4 +320,6 @@ void ConfigFile::_bind_methods() {
 
 	ClassDB::bind_method(D_METHOD("save_encrypted", "path", "key"), &ConfigFile::save_encrypted);
 	ClassDB::bind_method(D_METHOD("save_encrypted_pass", "path", "password"), &ConfigFile::save_encrypted_pass);
+
+	ClassDB::bind_method(D_METHOD("clear"), &ConfigFile::clear);
 }
diff --git a/core/io/config_file.h b/core/io/config_file.h
index 386d304f07..1b28257c60 100644
--- a/core/io/config_file.h
+++ b/core/io/config_file.h
@@ -68,6 +68,8 @@ public:
 	Error load(const String &p_path);
 	Error parse(const String &p_data);
 
+	void clear();
+
 	Error load_encrypted(const String &p_path, const Vector<uint8_t> &p_key);
 	Error load_encrypted_pass(const String &p_path, const String &p_pass);
 
diff --git a/core/io/image.cpp b/core/io/image.cpp
index 5d46d75efe..873eb66f33 100644
--- a/core/io/image.cpp
+++ b/core/io/image.cpp
@@ -3010,26 +3010,28 @@ Image::UsedChannels Image::detect_used_channels(CompressSource p_source) {
 	ERR_FAIL_COND_V(is_compressed(), USED_CHANNELS_RGBA);
 	bool r = false, g = false, b = false, a = false, c = false;
 
-	for (int i = 0; i < width; i++) {
-		for (int j = 0; j < height; j++) {
-			Color col = get_pixel(i, j);
+	const uint8_t *data_ptr = data.ptr();
 
-			if (col.r > 0.001) {
-				r = true;
-			}
-			if (col.g > 0.001) {
-				g = true;
-			}
-			if (col.b > 0.001) {
-				b = true;
-			}
-			if (col.a < 0.999) {
-				a = true;
-			}
+	uint32_t data_total = width * height;
 
-			if (col.r != col.b || col.r != col.g || col.b != col.g) {
-				c = true;
-			}
+	for (uint32_t i = 0; i < data_total; i++) {
+		Color col = _get_color_at_ofs(data_ptr, i);
+
+		if (col.r > 0.001) {
+			r = true;
+		}
+		if (col.g > 0.001) {
+			g = true;
+		}
+		if (col.b > 0.001) {
+			b = true;
+		}
+		if (col.a < 0.999) {
+			a = true;
+		}
+
+		if (col.r != col.b || col.r != col.g || col.b != col.g) {
+			c = true;
 		}
 	}
 
diff --git a/core/io/json.cpp b/core/io/json.cpp
index 0d9117fdda..394cf216e8 100644
--- a/core/io/json.cpp
+++ b/core/io/json.cpp
@@ -347,7 +347,6 @@ Error JSON::_parse_value(Variant &value, Token &token, const char32_t *p_str, in
 			return err;
 		}
 		value = d;
-		return OK;
 	} else if (token.type == TK_BRACKET_OPEN) {
 		Array a;
 		Error err = _parse_array(a, p_str, index, p_len, line, r_err_str);
@@ -355,8 +354,6 @@ Error JSON::_parse_value(Variant &value, Token &token, const char32_t *p_str, in
 			return err;
 		}
 		value = a;
-		return OK;
-
 	} else if (token.type == TK_IDENTIFIER) {
 		String id = token.value;
 		if (id == "true") {
@@ -369,18 +366,16 @@ Error JSON::_parse_value(Variant &value, Token &token, const char32_t *p_str, in
 			r_err_str = "Expected 'true','false' or 'null', got '" + id + "'.";
 			return ERR_PARSE_ERROR;
 		}
-		return OK;
-
 	} else if (token.type == TK_NUMBER) {
 		value = token.value;
-		return OK;
 	} else if (token.type == TK_STRING) {
 		value = token.value;
-		return OK;
 	} else {
 		r_err_str = "Expected value, got " + String(tk_name[token.type]) + ".";
 		return ERR_PARSE_ERROR;
 	}
+
+	return OK;
 }
 
 Error JSON::_parse_array(Array &array, const char32_t *p_str, int &index, int p_len, int &line, String &r_err_str) {
@@ -499,6 +494,19 @@ Error JSON::parse(const String &p_json, Variant &r_ret, String &r_err_str, int &
 
 	err = _parse_value(r_ret, token, str, idx, len, r_err_line, r_err_str);
 
+	// Check if EOF is reached
+	// or it's a type of the next token.
+	if (err == OK && idx < len) {
+		err = _get_token(str, idx, len, token, r_err_line, r_err_str);
+
+		if (err || token.type != TK_EOF) {
+			r_err_str = "Expected 'EOF'";
+			// Reset return value to empty `Variant`
+			r_ret = Variant();
+			return ERR_PARSE_ERROR;
+		}
+	}
+
 	return err;
 }
 
diff --git a/core/io/resource_importer.h b/core/io/resource_importer.h
index 91efec5534..eeb486073e 100644
--- a/core/io/resource_importer.h
+++ b/core/io/resource_importer.h
@@ -115,6 +115,9 @@ public:
 		ImportOption() {}
 	};
 
+	virtual bool has_advanced_options() const { return false; }
+	virtual void show_advanced_options(const String &p_path) {}
+
 	virtual int get_preset_count() const { return 0; }
 	virtual String get_preset_name(int p_idx) const { return String(); }