diff --git a/graphic/graphic_2d/native_drawing/drawing_text_typography.h b/graphic/graphic_2d/native_drawing/drawing_text_typography.h
index 90c0ebb964acfeefceb261dc2d170995ffbbd781..296044b877bf02fa088d28d715e517e4ac59e50a 100644
--- a/graphic/graphic_2d/native_drawing/drawing_text_typography.h
+++ b/graphic/graphic_2d/native_drawing/drawing_text_typography.h
@@ -1943,6 +1943,28 @@ bool OH_Drawing_TextStyleGetHalfLeading(OH_Drawing_TextStyle*);
  */
 const char* OH_Drawing_TextStyleGetLocale(OH_Drawing_TextStyle*);
 
+/* @brief Getting all font metrics from target row.
+ *
+ * @syscap SystemCapability.Graphic.Graphic2D.NativeDrawing
+ * @param OH_Drawing_Typography Indicates a pointer to a typesetting object.
+ * @param lineNumber Indicates specifies the number of rows.
+ * @param fontMetricsSize Indicates the return size of font metrics struct from current line.
+ * @return Returns all character measures for the current row.
+ * @since 12
+ * @version 1.0
+ */
+OH_Drawing_Font_Metrics* OH_Drawing_TypographyGetLineFontMetrics(OH_Drawing_Typography*,
+    size_t lineNumber, size_t* fontMetricsSize);
+
+/**
+ * @brief Free up all the space taken up by the lineFontMetric.
+ * 
+ * @syscap SystemCapability.Graphic.Graphic2D.NativeDrawing
+ * @param OH_Drawing_Font_Metrics Indicates the first address of the lineFontMetric gather to be destroyed.
+ * @since 12
+ * @version 1.0
+ */
+void OH_Drawing_TypographyDestroyLineFontMetrics(OH_Drawing_Font_Metrics*);
 #ifdef __cplusplus
 }
 #endif
diff --git a/graphic/graphic_2d/native_drawing/libnative_drawing.ndk.json b/graphic/graphic_2d/native_drawing/libnative_drawing.ndk.json
index b0ed71fce71647195f16c80b7b7b71d7bbb9ffe2..4ba8eb1f87fc0834e88f95226091fd6f85517980 100644
--- a/graphic/graphic_2d/native_drawing/libnative_drawing.ndk.json
+++ b/graphic/graphic_2d/native_drawing/libnative_drawing.ndk.json
@@ -897,5 +897,13 @@
     {
         "first_introduced": "12",
         "name": "OH_Drawing_TextStyleGetLocale"
+    },
+    {
+        "first_introduced": "12",
+        "name": "OH_Drawing_TypographyGetLineFontMetrics"
+    },
+    {
+        "first_introduced": "12",
+        "name": "OH_Drawing_TypographyDestroyLineFontMetrics"
     }
 ]
\ No newline at end of file