From 523262866a55f7ae42c94cb8a69edb79668c4846 Mon Sep 17 00:00:00 2001
From: Haibo <nomango@qq.com>
Date: Mon, 19 Nov 2018 12:57:44 +0800
Subject: [PATCH] add: Canvas::Clear method to clear canvas

---
 core/base/Canvas.cpp | 6 ++++++
 core/base/Canvas.h   | 3 +++
 2 files changed, 9 insertions(+)

diff --git a/core/base/Canvas.cpp b/core/base/Canvas.cpp
index 13141bcc..8380002a 100644
--- a/core/base/Canvas.cpp
+++ b/core/base/Canvas.cpp
@@ -445,6 +445,12 @@ namespace easy2d
 		cache_expired_ = true;
 	}
 
+	void Canvas::Clear()
+	{
+		render_target_->Clear();
+		cache_expired_ = true;
+	}
+
 	spImage Canvas::ExportToImage() const
 	{
 		auto image = new Image(GetBitmap());
diff --git a/core/base/Canvas.h b/core/base/Canvas.h
index 9ab67f99..9af38b9a 100644
--- a/core/base/Canvas.h
+++ b/core/base/Canvas.h
@@ -153,6 +153,9 @@ namespace easy2d
 		// 路径填充
 		void FillPath();
 
+		// 清空画布
+		void Clear();
+
 		// 设置填充颜色
 		void SetFillColor(
 			const Color& color