Magic_Game/src/kiwano/renderer/Geometry.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 "win32/D2DDeviceResources.h"

namespace kiwano
{

	// <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
	class KGE_API Geometry
	{
	public:
		// <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ģʽ
		enum class CombineMode
		{
			Union,		/* <20><><EFBFBD><EFBFBD> (A + B) */
			Intersect,	/* <20><><EFBFBD><EFBFBD> (A + B) */
			Xor,		/* <20>ԳƲ ((A - B) + (B - A)) */
			Exclude		/* <20> (A - B) */
		};

	public:
		Geometry();

		Geometry(ComPtr<ID2D1Geometry> geo);

		// <20><>ȡ<EFBFBD><C8A1><EFBFBD>а<EFBFBD>Χ<EFBFBD><CEA7>
		Rect GetBoundingBox(
			Matrix3x2 const& transform = Matrix3x2()
		) const;

		// <20>ж<EFBFBD>ͼ<EFBFBD><CDBC><EFBFBD>Ƿ<EFBFBD><C7B7><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
		bool ContainsPoint(
			Point const& point
		);

		// <20><>ȡͼ<C8A1><CDBC>չ<EFBFBD><D5B9><EFBFBD><EFBFBD>һ<EFBFBD><D2BB>ֱ<EFBFBD>ߵij<DFB5><C4B3><EFBFBD>
		float GetLength();

		// <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
		float ComputeArea();

		// <20><><EFBFBD><EFBFBD>ͼ<EFBFBD><CDBC>·<EFBFBD><C2B7><EFBFBD>ϵ<EFBFBD><CFB5><EFBFBD>λ<EFBFBD>ú<EFBFBD><C3BA><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
		bool ComputePointAtLength(
			float length,
			Point& point,
			Vec2& tangent
		);

		// <20><><EFBFBD>ϼ<EFBFBD><CFBC><EFBFBD><EFBFBD><EFBFBD>
		Geometry CombineWith(
			Geometry input,
			CombineMode mode,
			Matrix3x2 const& input_matrix = Matrix3x2()
		);

		// <20><><EFBFBD>϶<EFBFBD><CFB6><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
		// <20><><EFBFBD><EFBFBD> modes <20><> matrixs <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ӦΪ 1 <20><> geos <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ
		static Geometry Combine(
			Vector<Geometry> const& geos,
			Vector<CombineMode> const& modes,
			Vector<Matrix3x2> const& matrixs = { Matrix3x2() }
		);

		// <20><><EFBFBD><EFBFBD>ֱ<EFBFBD><D6B1>
		static Geometry CreateLine(
			Point const& begin,
			Point const& end
		);

		// <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
		static Geometry CreateRect(
			Rect const& rect
		);

		// <20><><EFBFBD><EFBFBD>Բ<EFBFBD>Ǿ<EFBFBD><C7BE><EFBFBD>
		static Geometry CreateRoundedRect(
			Rect const& rect,
			Vec2 const& radius
		);

		// <20><><EFBFBD><EFBFBD>Բ<EFBFBD><D4B2>
		static Geometry CreateCircle(
			Point const& center,
			float radius
		);

		// <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Բ<EFBFBD><D4B2>
		static Geometry CreateEllipse(
			Point const& center,
			Vec2 const& radius
		);

	public:
		inline ComPtr<ID2D1Geometry> GetGeometry() const		{ return geo_; }

		inline void SetGeometry(ComPtr<ID2D1Geometry> geometry)	{ geo_ = geometry; }

		inline operator bool() const							{ return static_cast<bool>(geo_); }

	protected:
		ComPtr<ID2D1Geometry> geo_;
	};


	// <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
	class KGE_API GeometrySink
		: protected noncopyable
	{
	public:
		GeometrySink();

		// <20><>ʼ<EFBFBD><CABC><EFBFBD><EFBFBD>·<EFBFBD><C2B7>
		GeometrySink& BeginPath(
			Point const& begin_pos = Point{}	/* <20><>ʼ<EFBFBD><CABC> */
		);

		// <20><><EFBFBD><EFBFBD>·<EFBFBD><C2B7>
		GeometrySink& EndPath(
			bool closed = false		/* ·<><C2B7><EFBFBD>Ƿ<EFBFBD><C7B7>պ<EFBFBD> */
		);

		// <20><><EFBFBD><EFBFBD>һ<EFBFBD><D2BB><EFBFBD>߶<EFBFBD>
		GeometrySink& AddLine(
			Point const& point		/* <20>˵<EFBFBD> */
		);

		// <20><><EFBFBD>Ӷ<EFBFBD><D3B6><EFBFBD><EFBFBD>߶<EFBFBD>
		GeometrySink& AddLines(
			Vector<Point> const& points
		);

		// <20><><EFBFBD><EFBFBD>һ<EFBFBD><D2BB><EFBFBD><EFBFBD><EFBFBD>η<EFBFBD><CEB7><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
		GeometrySink& AddBezier(
			Point const& point1,	/* <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ߵĵ<DFB5>һ<EFBFBD><D2BB><EFBFBD><EFBFBD><EFBFBD>Ƶ<EFBFBD> */
			Point const& point2,	/* <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ߵĵڶ<C4B5><DAB6><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƶ<EFBFBD> */
			Point const& point3		/* <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ߵ<EFBFBD><DFB5>յ<EFBFBD> */
		);

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

		// <20><>ȡ<EFBFBD><C8A1><EFBFBD><EFBFBD>·<EFBFBD><C2B7><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
		Geometry GetGeometry();

	public:
		inline ComPtr<ID2D1PathGeometry> GetPathGeometry() const	{ return path_geo_; }

		inline void SetPathGeometry(ComPtr<ID2D1PathGeometry> path)	{ path_geo_ = path; }

		inline ComPtr<ID2D1GeometrySink> GetGeometrySink() const	{ return sink_; }

		inline void SetGeometrySink(ComPtr<ID2D1GeometrySink> sink)	{ sink_ = sink; }

		void Init();

		void OpenSink();

		void CloseSink();

	protected:
		ComPtr<ID2D1PathGeometry> path_geo_;
		ComPtr<ID2D1GeometrySink> sink_;
	};
}