kev/Drawer/SSBase/DrawOperator/FormatReader/PdfDraw.h

//////////////////////////////////////////////////////////////////////////////
//文件 CPdfDraw.h
//主要功能: 
//
//程序编写:	
/////////////////////////////////////////////////////////////////////////////

#pragma once
#include "formatdc.h"
#include "../IDcDraw.h"
#ifndef M_PI
# define M_PI		3.14159265358979323846	/* pi */
#endif 
#ifndef M_PI_2
#define M_PI_2 (M_PI / 2.0)
#endif

#include "cairo/cairo.h"
#include "cairo/cairo-pdf.h"
#include <unordered_map>

class CPdfDraw :
	public IDcDraw
{
public:
	typedef struct
	{
		double x;		//线段点的x
		double y;		//线段点的y
		COLORREF Color; //记录线段色彩
	}CAIROPOINT;

	enum class CairoFitMode
	{
		Center = 0,		// 居中
		FitToPage = 1   // 按比例最大适应（缩放）
	};

	enum class CairoSize
	{
		Cairo_A3 = 0,
		Cairo_A4 = 1,
		Cairo_A5 = 2,
		Cairo_B4 = 3
	};

public:
	CPdfDraw();
	CPdfDraw(CXyDC* pXyDC);
	~CPdfDraw();
	void Create(CXyDC* pXyDC);

	void InitDC();
	void ReleaseDC();
	void Close();

	void SetPdfData(CXy* pXy);
	void SetPdfFilePath(const CString &path);
	void SetPdfNumber(int num);

	void Draw(CText& text, CCurveEx* pCurveRect = NULL);				//当pCurveRect不为空时表示仅是为了获得显示范围
	void Draw(CText& text, COLORREF color);								//-文字
	void Draw(CMText& mtext);

	void Draw(CEllipse& elp, COLORREF Color);
	void Draw(CCircle& circle, COLORREF Color);
	void Draw(CInsertDraw& m_insert);									//-符号井（特殊符号 组合）
	void Draw(CXyDC* pNewXyDC, CInsertDraw& m_insert);
	void Draw(CInsertOld& m_insert);
	void Draw(CXyDC* pInsertXyDC, CInsertOld& m_insert);
	void Draw(CSection& section, CRect8* rect = NULL);
	void Draw(CImageInsert& image);										//-背景
	void Draw(CMesh& mesh);
	void Draw(CMetaFile& mf);
	void Draw(CColorRuler& ruler, CColorBase& color);					//-色标
	void Draw(CPathFill& path, COLORREF fillColor, void* HowToViewCurve);
	void Draw(C3DFaultageSurface& fs, COLORREF fillColor, void* HowToViewCurve);

	void Draw(CProportion& proportion, COLORREF color);					//-比例尺

	void Draw(CCurveEx& curve, double l1, double l2);
	void Draw(CCurveEx& m_curve);
	void Draw(CCurveEx& curve, void* HowToViewCurve);					//-修饰线
	void Draw(CCurveEx& curve, COLORREF color, BOOL bSmoothHead = TRUE);//-线
	void DrawVirtualCairo(CCurveEx &curve, CCurveProperties *type);		//虚线

	void Draw(CCurveRect& rt, void* HowToViewCurve);
	void Draw(CCurveRect& curve, COLORREF color);

	void Draw(CPointNameEx& point, void* HowToViewPoint);				//-符号井
	void Draw(CPointCrossName& point, void* HowToViewPoint);
	void Draw(CPointTwoName& point, void* HowToViewPoint);

	void Draw(CInsertDrawRect& idr);//-
	void Draw(CArc& arc, void* HowToViewCurve);//-
	void Draw(CArc& arc, COLORREF color);//-
	void Draw(CFrame& frame, COLORREF color);							//- 边框（不处理）
	void Draw(CNet& net, COLORREF colText, COLORREF colLine);
	void Draw(CGridding& grid, COLORREF colText, COLORREF colLine);		//- 边框经纬网（不处理） 
	void Draw(COtherDraw& od, void* HowToViewCurve);
	void Draw(COtherDraw& od, COLORREF color);
	void Draw(COleObject& ole);
	void Draw(CTree& tree);
	void Draw(CStation& cs);
	void Draw(CCurveTV5& tv, void* HowToViewCurve);
	void Draw(CScaleRuler& sr, COLORREF color);
	void Draw(CRectLabel& rl, COLORREF color, void* HowToViewCurve);

	void DrawArray(CMxn& mxn, COLORREF colFront, COLORREF colBack);		//前景色与背景色
	void Draw(CMxn& mxn, COLORREF colFront, COLORREF colBack);
	void DrawGrid(CMxn& mxn);

	void Draw(CHorizontalWell& horizontalwell, void* HowToViewCurve);
	void Draw(CWellGroup& wellGroup);

	void PolyLine(CPointList& dp);
	void PaintRgn(LPPOINT sp, int count);

	//绘制等值线及其名称
	void DrawPolylineName(const vector<CAIROPOINT>& points, const CString &name, double text_h, double position_distance = -1.0);

	void SetMargins(double left, double right, double top, double bottom);
	void SetLandscape(int isLandscape);
	void SetFitMode(CairoFitMode mode);
	void SetPDFSize(CairoSize type);
	void SetPDFCairo(void *pCairo, bool state);
private:
	void Clear();
	//设置颜色
	void SetCairoColorFromCOLORREF(cairo_t* cr, COLORREF color, double alpha = 1);
	//坐标映射到A4
	void Map_Coordinates(cairo_t* cr, double externalWidth, double externalHeight, double A4Width, double A4Height);
	//将角度转换为弧度
	double DegreesToRadians(double degrees);

	uint8_t* LoadBMPToARGBData(const char* filePath, uint32_t& width, uint32_t& height);

	//查询元素对应的COne
	COne* FindElementMap(void* pValue);
	//文字绘制
	void DrawCairoText(CText& text, COLORREF color);
	//文字带有角度处理
	void DrawCairoTextAngle(CText &text, COLORREF color);
	//文字换行显示(Cairo不支持"\r\n" "\n")
	void DrawCairoMultilineText(CText& text, COLORREF color);
	//文字竖向显示，横向文字偏转90°
	void DrawCairoVerticalText(CText& text, COLORREF color);
	//矩形充填绘制
	void DrawCairoFillRect(CRect8& rect, COLORREF color);
	//绘制线段
	void DrawCairoLine(std::vector<CAIROPOINT>& pointVec, COLORREF color = 0);
	//色标绘制
	void DrawCairoRulerImage(CColorRuler& ruler, CColorBase &color);
	//绘制缺省符号
	void DrawOther(double x0, double y0, CSize8 sz, COLORREF col, UINT nMode, double a);

	//添加pdf页码
	void DrawCairoAddPdfNumber();

	//
	void DrawCairoCurveMark(CCurveEx &curve);
	//计算线段名字属性位置
	void ComputeCurveName(CCurveEx &curve, CCurveName *pName, int state);

	//计算距离
	double DistancePolyLine(const CAIROPOINT& p1, const CAIROPOINT& p2);
	//计算距离
	double TotalLengthPolyLine(const std::vector<CAIROPOINT>& points);
	//获取多边形质心
	CPoint2D GetPolygonCentroid(const CCurveEx& curve, CXyDC* pXyDc);
	//横向文字分割成单个
	std::vector<std::string> StringSplit(const std::string& str);

	/**
		 * 将上下标字符转换
		 *
		 * \param cmd
		 * \return 转换后的字符
		 */
	CString ReverseSuperAndSubConversion(CString cmd);

	//设置折线平滑 插值
	void DrawSmoothPathUsingInterpolation(
		cairo_t* cr,
		double* x,
		double* y,
		int count,
		int samplesPerSegment = 20);

	/**
		 * 处理两个闭合多边形的交点集充填 处理透明充填问题
		 *
		 * \param polysA	多边形集合
		 * \param curPoly	当前多边形
		 */
	void FillIntersection(
		const std::vector<std::vector<CAIROPOINT>>& polysA,
		std::vector<CAIROPOINT>& curPoly);

	//背景
	void DrawCairoImageInsert(CImageInsert& image);

private:
	cairo_t* p_cairo;
	cairo_surface_t* p_surface;

	bool m_symbolstate;			//绘制pdf符号线段线宽使用
	double m_scale;
	CSize8 m_paperSize;			//图纸宽高mm(A4)
	CRect8 m_rect;
	CSize8 m_unit;
	CRect8 m_paperMargin;		//边距（单位是 point，72 point = 1英寸）

	int m_landscape;			//0自适应, 1为纵向， 2横向
	int m_number;				//页码
	CairoFitMode m_fitMode;

	CString m_filePath;
	std::unordered_map<void*, COne*> m_elementMap;

	std::shared_ptr<CXyDC> m_cacheXyDC;		//单独显示符号
	std::shared_ptr<CXyDC> m_cacheOldXyDC;	//单独显示符号
	std::shared_ptr<CXyDC> m_symbolXyDC;	//充填符号单独绘制

	std::vector<std::vector<CAIROPOINT>> m_polygons; //记录多边个数
};