Magic_Game/src/kiwano/2d/Canvas.h

// Copyright (c) 2016-2018 Kiwano - Nomango
// 
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
// 
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.

#pragma once
#include <kiwano/2d/Actor.h>
#include <kiwano/render/RenderContext.h>
#include <kiwano/render/GeometrySink.h>

namespace kiwano
{
	KGE_DECLARE_SMART_PTR(Canvas);

	/**
	* \addtogroup Actors
	* @{
	*/

	/**
	* \~chinese
	* @brief <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڻ<EFBFBD><EFBFBD><EFBFBD>ͼԪ
	*/
	class KGE_API Canvas
		: public Actor
	{
	public:
		/// \~chinese
		/// @brief <20><><EFBFBD><EFBFBD><EFBFBD>ջ<EFBFBD><D5BB><EFBFBD>
		Canvas();

		virtual ~Canvas();

		/// \~chinese
		/// @brief <20><>ʼ<EFBFBD><CABC>ͼ
		void BeginDraw();

		/// \~chinese
		/// @brief <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͼ
		void EndDraw();

		/// \~chinese
		/// @brief <20><><EFBFBD>߶<EFBFBD>
		/// @param begin <20>߶<EFBFBD><DFB6><EFBFBD><EFBFBD><EFBFBD>
		/// @param end <20>߶<EFBFBD><DFB6>յ<EFBFBD>
		void DrawLine(Point const& begin, Point const& end);

		/// \~chinese
		/// @brief <20><>Բ<EFBFBD>α߿<CEB1>
		/// @param center Բ<><D4B2>ԭ<EFBFBD><D4AD>
		/// @param radius Բ<>ΰ뾶
		void DrawCircle(Point const& center, float radius);

		/// \~chinese
		/// @brief <20><><EFBFBD><EFBFBD>Բ<EFBFBD>α߿<CEB1>
		/// @param center <20><>Բԭ<D4B2><D4AD>
		/// @param radius <20><>Բ<EFBFBD>뾶
		void DrawEllipse(Point const& center, Vec2 const& radius);

		/// \~chinese
		/// @brief <20><><EFBFBD><EFBFBD><EFBFBD>α߿<CEB1>
		/// @param rect <20><><EFBFBD><EFBFBD>
		void DrawRect(Rect const& rect);

		/// \~chinese
		/// @brief <20><>Բ<EFBFBD>Ǿ<EFBFBD><C7BE>α߿<CEB1>
		/// @param rect <20><><EFBFBD><EFBFBD>
		/// @param radius <20><><EFBFBD><EFBFBD>Բ<EFBFBD>ǰ뾶
		void DrawRoundedRect(Rect const& rect, Vec2 const& radius);

		/// \~chinese
		/// @brief <20><><EFBFBD><EFBFBD>Բ<EFBFBD><D4B2>
		/// @param center Բ<><D4B2>ԭ<EFBFBD><D4AD>
		/// @param radius Բ<>ΰ뾶
		void FillCircle(Point const& center, float radius);

		/// \~chinese
		/// @brief <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Բ<EFBFBD><D4B2>
		/// @param center <20><>Բԭ<D4B2><D4AD>
		/// @param radius <20><>Բ<EFBFBD>뾶
		void FillEllipse(Point const& center, Vec2 const& radius);

		/// \~chinese
		/// @brief <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
		/// @param rect <20><><EFBFBD><EFBFBD>
		void FillRect(Rect const& rect);

		/// \~chinese
		/// @brief <20><><EFBFBD><EFBFBD>Բ<EFBFBD>Ǿ<EFBFBD><C7BE><EFBFBD>
		/// @param rect <20><><EFBFBD><EFBFBD>
		/// @param radius <20><><EFBFBD><EFBFBD>Բ<EFBFBD>ǰ뾶
		void FillRoundedRect(Rect const& rect, Vec2 const& radius);

		/// \~chinese
		/// @brief <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
		/// @param texture <20><><EFBFBD><EFBFBD>
		/// @param src_rect <20><><EFBFBD><EFBFBD><EFBFBD>ü<EFBFBD><C3BC><EFBFBD><EFBFBD><EFBFBD>
		/// @param dest_rect <20><><EFBFBD><EFBFBD>Ŀ<EFBFBD><C4BF><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
		void DrawTexture(TexturePtr texture, const Rect* src_rect = nullptr, const Rect* dest_rect = nullptr);

		/// \~chinese
		/// @brief <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֲ<EFBFBD><D6B2><EFBFBD>
		/// @param text <20><><EFBFBD><EFBFBD>
		/// @param point <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֵ<EFBFBD>λ<EFBFBD><CEBB>
		void DrawTextLayout(String const& text, Point const& point);

		/// \~chinese
		/// @brief <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֲ<EFBFBD><D6B2><EFBFBD>
		/// @param layout <20><><EFBFBD>ֲ<EFBFBD><D6B2><EFBFBD>
		/// @param point <20><><EFBFBD>Ʋ<EFBFBD><C6B2>ֵ<EFBFBD>λ<EFBFBD><CEBB>
		void DrawTextLayout(TextLayout const& layout, Point const& point);

		/// \~chinese
		/// @brief <20><>ʼ<EFBFBD><CABC><EFBFBD><EFBFBD>·<EFBFBD><C2B7>
		/// @param begin_pos ·<><C2B7><EFBFBD><EFBFBD>ʼ<EFBFBD><CABC>
		void BeginPath(Point const& begin_pos);

		/// \~chinese
		/// @brief <20><><EFBFBD><EFBFBD>·<EFBFBD><C2B7>
		/// @param closed ·<><C2B7><EFBFBD>Ƿ<EFBFBD><C7B7>պ<EFBFBD>
		void EndPath(bool closed = false);

		/// \~chinese
		/// @brief <20><><EFBFBD><EFBFBD>һ<EFBFBD><D2BB><EFBFBD>߶<EFBFBD>
		/// @param point <20>˵<EFBFBD>
		void AddLine(Point const& point);

		/// \~chinese
		/// @brief <20><><EFBFBD>Ӷ<EFBFBD><D3B6><EFBFBD><EFBFBD>߶<EFBFBD>
		/// @param points <20>˵㼯<CBB5><E3BCAF>
		void AddLines(Vector<Point> const& points);

		/// \~chinese
		/// @brief <20><><EFBFBD><EFBFBD>һ<EFBFBD><D2BB><EFBFBD><EFBFBD><EFBFBD>η<EFBFBD><CEB7><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
		/// @param point1 <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ߵĵ<DFB5>һ<EFBFBD><D2BB><EFBFBD><EFBFBD><EFBFBD>Ƶ<EFBFBD>
		/// @param point2 <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ߵĵڶ<C4B5><DAB6><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƶ<EFBFBD>
		/// @param point3 <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ߵ<EFBFBD><DFB5>յ<EFBFBD>
		void AddBezier(Point const& point1, Point const& point2, Point const& point3);

		/// \~chinese
		/// @brief <20><><EFBFBD>ӻ<EFBFBD><D3BB><EFBFBD>
		/// @param point <20>յ<EFBFBD>
		/// @param radius <20><>Բ<EFBFBD>뾶
		/// @param rotation <20><>Բ<EFBFBD><D4B2>ת<EFBFBD>Ƕ<EFBFBD>
		/// @param clockwise ˳ʱ<CBB3><CAB1> or <20><>ʱ<EFBFBD><CAB1>
		/// @param is_small <20>Ƿ<EFBFBD>ȡС<C8A1><D0A1> 180<38><30> <20>Ļ<EFBFBD>
		void AddArc(Point const& point, Size const& radius, float rotation, bool clockwise = true, bool is_small = true);

		/// \~chinese
		/// @brief <20><><EFBFBD><EFBFBD><EFBFBD>ߵķ<DFB5>ʽ<EFBFBD><CABD><EFBFBD><EFBFBD>·<EFBFBD><C2B7>
		void StrokePath();

		/// \~chinese
		/// @brief <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ķ<EFBFBD>ʽ<EFBFBD><CABD><EFBFBD><EFBFBD>·<EFBFBD><C2B7>
		void FillPath();

		/// \~chinese
		/// @brief <20><><EFBFBD>ջ<EFBFBD><D5BB><EFBFBD>
		void Clear();

		/// \~chinese
		/// @brief <20><><EFBFBD>ջ<EFBFBD><D5BB><EFBFBD>
		/// @param clear_color <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɫ
		void Clear(Color const& clear_color);

		/// \~chinese
		/// @brief <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɫ
		/// @param color <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɫ
		void SetFillColor(Color const& color);

		/// \~chinese
		/// @brief <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>仭ˢ
		/// @param[in] brush <20><><EFBFBD>仭ˢ
		void SetFillBrush(BrushPtr brush);

		/// \~chinese
		/// @brief <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɫ
		/// @param color <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɫ
		void SetStrokeColor(Color const& color);

		/// \~chinese
		/// @brief <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ˢ
		/// @param[in] brush <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ˢ
		void SetStrokeBrush(BrushPtr brush);

		/// \~chinese
		/// @brief <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
		/// @param width <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
		void SetStrokeWidth(float width);

		/// \~chinese
		/// @brief <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʽ
		/// @param stroke_style <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʽ
		void SetStrokeStyle(const StrokeStyle& stroke_style);

		/// \~chinese
		/// @brief <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֻ<EFBFBD>ˢ<EFBFBD><CBA2>ʽ
		/// @param text_style <20><><EFBFBD>ֻ<EFBFBD>ˢ<EFBFBD><CBA2>ʽ
		void SetTextStyle(TextStyle const& text_style);

		/// \~chinese
		/// @brief <20><><EFBFBD>û<EFBFBD>ˢ
		/// @param[in] brush <20><>ˢ
		void SetBrush(BrushPtr brush);

		/// \~chinese
		/// @brief <20><><EFBFBD>û<EFBFBD>ˢ<EFBFBD><CBA2>ά<EFBFBD>任
		/// @param transform <20><>ά<EFBFBD>任
		void SetBrushTransform(Transform const& transform);

		/// \~chinese
		/// @brief <20><><EFBFBD>û<EFBFBD>ˢ<EFBFBD><CBA2>ά<EFBFBD>任<EFBFBD><E4BBBB><EFBFBD><EFBFBD>
		/// @param transform <20><>ά<EFBFBD>任<EFBFBD><E4BBBB><EFBFBD><EFBFBD>
		void SetBrushTransform(Matrix3x2 const& transform);

		/// \~chinese
		/// @brief <20><><EFBFBD><EFBFBD>һ<EFBFBD><D2BB>ͼ<EFBFBD><CDBC>
		/// @param area ͼ<><CDBC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
		void PushLayerArea(LayerArea& area);

		/// \~chinese
		/// @brief ɾ<><C9BE><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ӵ<EFBFBD>ͼ<EFBFBD><CDBC>
		void PopLayerArea();

		/// \~chinese
		/// @brief <20><><EFBFBD><EFBFBD>һ<EFBFBD><D2BB><EFBFBD>ü<EFBFBD><C3BC><EFBFBD><EFBFBD><EFBFBD>
		/// @param clip_rect <20>ü<EFBFBD><C3BC><EFBFBD><EFBFBD><EFBFBD>
		void PushClipRect(Rect const& clip_rect);

		/// \~chinese
		/// @brief ɾ<><C9BE><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ӵIJü<C4B2><C3BC><EFBFBD><EFBFBD><EFBFBD>
		void PopClipRect();

		/// \~chinese
		/// @brief <20><>ȡ<EFBFBD><C8A1><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
		float GetStrokeWidth() const;

		/// \~chinese
		/// @brief <20><>ȡ<EFBFBD><C8A1><EFBFBD>仭ˢ
		BrushPtr GetFillBrush() const;

		/// \~chinese
		/// @brief <20><>ȡ<EFBFBD><C8A1><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ˢ
		BrushPtr GetStrokeBrush() const;

		/// \~chinese
		/// @brief <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
		TexturePtr ExportToTexture() const;

		void OnRender(RenderContext& ctx) override;

	private:
		void InitRenderTargetAndBrushs();

		void UpdateCache() const;

	private:
		float			stroke_width_;
		TextStyle		text_style_;
		StrokeStyle		stroke_style_;
		GeometrySink	geo_sink_;
		BrushPtr		fill_brush_;
		BrushPtr		stroke_brush_;

		mutable bool					cache_expired_;
		mutable TexturePtr				texture_cached_;
		mutable TextureRenderContextPtr	ctx_;
	};

	/** @} */

	inline void Canvas::SetStrokeWidth(float width)
	{
		stroke_width_ = std::max(width, 0.f);
	}

	inline void Canvas::SetStrokeStyle(const StrokeStyle& stroke_style)
	{
		stroke_style_ = stroke_style;
	}

	inline void Canvas::SetTextStyle(TextStyle const& text_style)
	{
		text_style_ = text_style;
	}

	inline void Canvas::SetStrokeColor(Color const& color)
	{
		InitRenderTargetAndBrushs();
		stroke_brush_->SetColor(color);
	}

	inline void Canvas::SetFillColor(Color const& color)
	{
		InitRenderTargetAndBrushs();
		fill_brush_->SetColor(color);
	}

	inline void Canvas::SetFillBrush(BrushPtr brush)
	{
		fill_brush_ = brush;
	}

	inline void Canvas::SetStrokeBrush(BrushPtr brush)
	{
		stroke_brush_ = brush;
	}

	inline BrushPtr Canvas::GetFillBrush() const
	{
		return fill_brush_;
	}

	inline BrushPtr Canvas::GetStrokeBrush() const
	{
		return stroke_brush_;
	}

}