From 0c391fdbce5a079cf03e483eb6174dd47806163d Mon Sep 17 00:00:00 2001
From: chai <chaifix@163.com>
Date: Wed, 7 Aug 2019 21:08:47 +0800
Subject: *misc

---
 Source/modules/asura-core/Graphics/Canvas.h | 73 +++++++++++++++++++++++++++++
 1 file changed, 73 insertions(+)
 create mode 100644 Source/modules/asura-core/Graphics/Canvas.h

(limited to 'Source/modules/asura-core/Graphics/Canvas.h')

diff --git a/Source/modules/asura-core/Graphics/Canvas.h b/Source/modules/asura-core/Graphics/Canvas.h
new file mode 100644
index 0000000..de02b9d
--- /dev/null
+++ b/Source/modules/asura-core/Graphics/Canvas.h
@@ -0,0 +1,73 @@
+#ifndef _ASURA_ENGINE_CANVAS_H_
+#define _ASURA_ENGINE_CANVAS_H_
+
+#include <asura-base/Scripting/Scripting.h>
+#include <asura-base/Math/Rect.hpp>
+#include <asura-base/Math/Vector2.hpp>
+#include <asura-base/Exception.h>
+
+#include "GfxDevice.h"
+#include "Texture.h"
+#include "RenderTarget.h"
+#include "RenderState.h"
+
+namespace_begin(AsuraEngine)
+namespace_begin(Graphics)
+
+
+///
+/// Canvas也可以称为render texture，自身也可以作为texture渲染。
+///
+class Canvas ASURA_FINAL
+	: public Scripting::Portable<Canvas, RenderTarget>
+{
+public:
+
+	Canvas();
+
+	~Canvas();
+
+	///
+	/// 设置render texture的大小
+	///
+	void SetSize(uint w, uint h) ASURA_THROW(Exception);
+
+	void Clear(const Color& col = Color::Black) override;
+/*
+	void Clear(const Math::Recti& quad, const Color& col = Color::Black) override;
+*/
+	void Render(const RenderTarget* rt, const Math::Vector2i& pos, const Math::Vector2i& scale, const Math::Vector2i& center, float rot);
+
+	void Render(const RenderTarget* rt, const Math::Rectf& quad, const Math::Vector2i& pos, const Math::Vector2i& scale, const Math::Vector2i& center, float rot);
+
+	void Draw(const Drawable* texture, const RenderState& state);
+
+	void Draw(const Drawable* texture, const Math::Recti& quad, const RenderState& state);
+
+private:
+
+	GLuint m_FBO;
+
+	GLuint m_TexID;
+
+	uint m_Width, m_Height;
+
+luaxport:
+
+	LUAX_DECL_FACTORY(Canvas, RenderTarget);
+
+	LUAX_DECL_METHOD(_SetSize);
+	LUAX_DECL_METHOD(_Bind);
+	LUAX_DECL_METHOD(_Unbind);
+
+};
+
+///
+/// Canvas别名为RenderTexture
+///
+typedef Canvas RenderTexture;
+
+} // Graphics
+} // AsuraEngine 
+
+#endif
\ No newline at end of file
-- 
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