add nativeapis

Signed-off-by: Nzengyawen <zengyawen1@huawei.com>

en/application-dev/reference/native-apis/drawing__brush_8h.md

 # drawing_brush.h
+
+
+## Overview
+
+Declares functions related to the **brush** object in the drawing module.
+
+**Since:**
+8
+
+**Related Modules:**
+
+[Drawing](_drawing.md)
+
+
+## Summary
+
+
+### Functions
+
+| Name | Description | 
+| -------- | -------- |
+| [OH_Drawing_BrushCreate](_drawing.md#oh_drawing_brushcreate) (void) | Creates an **OH_Drawing_Brush** object.  | 
+| [OH_Drawing_BrushDestroy](_drawing.md#oh_drawing_brushdestroy) ([OH_Drawing_Brush](_drawing.md#oh_drawing_brush) \*) | Destroys an **OH_Drawing_Brush** object and reclaims the memory occupied by the object.  | 
+| [OH_Drawing_BrushIsAntiAlias](_drawing.md#oh_drawing_brushisantialias) (const [OH_Drawing_Brush](_drawing.md#oh_drawing_brush) \*) | Checks whether anti-aliasing is enabled for a brush. If anti-aliasing is enabled, edges will be drawn with partial transparency.  | 
+| [OH_Drawing_BrushSetAntiAlias](_drawing.md#oh_drawing_brushsetantialias) ([OH_Drawing_Brush](_drawing.md#oh_drawing_brush) \*, bool) | Enables or disables anti-aliasing for a brush. If anti-aliasing is enabled, edges will be drawn with partial transparency.  | 
+| [OH_Drawing_BrushGetColor](_drawing.md#oh_drawing_brushgetcolor) (const [OH_Drawing_Brush](_drawing.md#oh_drawing_brush) \*) | Obtains the color of a brush. The color is used by the brush to fill in a shape.  | 
+| [OH_Drawing_BrushSetColor](_drawing.md#oh_drawing_brushsetcolor) ([OH_Drawing_Brush](_drawing.md#oh_drawing_brush) \*, uint32_t color) | Sets the color for a brush. The color will be used by the brush to fill in a shape.  |