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File indexing completed on 2025-12-11 10:26:10
0001 //======================================================================== 0002 // 0003 // SplashXPath.h 0004 // 0005 //======================================================================== 0006 0007 //======================================================================== 0008 // 0009 // Modified under the Poppler project - http://poppler.freedesktop.org 0010 // 0011 // All changes made under the Poppler project to this file are licensed 0012 // under GPL version 2 or later 0013 // 0014 // Copyright (C) 2013 Thomas Freitag <Thomas.Freitag@alfa.de> 0015 // Copyright (C) 2018, 2021 Albert Astals Cid <aacid@kde.org> 0016 // 0017 // To see a description of the changes please see the Changelog file that 0018 // came with your tarball or type make ChangeLog if you are building from git 0019 // 0020 //======================================================================== 0021 0022 #ifndef SPLASHXPATH_H 0023 #define SPLASHXPATH_H 0024 0025 #include "SplashTypes.h" 0026 0027 class SplashPath; 0028 struct SplashXPathAdjust; 0029 0030 //------------------------------------------------------------------------ 0031 0032 #define splashMaxCurveSplits (1 << 10) 0033 0034 //------------------------------------------------------------------------ 0035 // SplashXPathSeg 0036 //------------------------------------------------------------------------ 0037 0038 struct SplashXPathSeg 0039 { 0040 SplashCoord x0, y0; // first endpoint 0041 SplashCoord x1, y1; // second endpoint 0042 SplashCoord dxdy; // slope: delta-x / delta-y 0043 SplashCoord dydx; // slope: delta-y / delta-x 0044 unsigned int flags; 0045 }; 0046 0047 #define splashXPathHoriz \ 0048 0x01 // segment is vertical (y0 == y1) 0049 // (dxdy is undef) 0050 #define splashXPathVert \ 0051 0x02 // segment is horizontal (x0 == x1) 0052 // (dydx is undef) 0053 #define splashXPathFlip 0x04 // y0 > y1 0054 0055 //------------------------------------------------------------------------ 0056 // SplashXPath 0057 //------------------------------------------------------------------------ 0058 0059 class SplashXPath 0060 { 0061 public: 0062 // Expands (converts to segments) and flattens (converts curves to 0063 // lines) <path>. Transforms all points from user space to device 0064 // space, via <matrix>. If <closeSubpaths> is true, closes all open 0065 // subpaths. 0066 SplashXPath(SplashPath *path, SplashCoord *matrix, SplashCoord flatness, bool closeSubpaths, bool adjustLines = false, int linePosI = 0); 0067 0068 ~SplashXPath(); 0069 0070 SplashXPath(const SplashXPath &) = delete; 0071 SplashXPath &operator=(const SplashXPath &) = delete; 0072 0073 // Multiply all coordinates by splashAASize, in preparation for 0074 // anti-aliased rendering. 0075 void aaScale(); 0076 0077 // Sort by upper coordinate (lower y), in y-major order. 0078 void sort(); 0079 0080 protected: 0081 void transform(SplashCoord *matrix, SplashCoord xi, SplashCoord yi, SplashCoord *xo, SplashCoord *yo); 0082 void strokeAdjust(SplashXPathAdjust *adjust, SplashCoord *xp, SplashCoord *yp); 0083 void grow(int nSegs); 0084 void addCurve(SplashCoord x0, SplashCoord y0, SplashCoord x1, SplashCoord y1, SplashCoord x2, SplashCoord y2, SplashCoord x3, SplashCoord y3, SplashCoord flatness, bool first, bool last, bool end0, bool end1); 0085 void addSegment(SplashCoord x0, SplashCoord y0, SplashCoord x1, SplashCoord y1); 0086 0087 SplashXPathSeg *segs; 0088 int length, size; // length and size of segs array 0089 0090 friend class SplashXPathScanner; 0091 friend class SplashClip; 0092 friend class Splash; 0093 }; 0094 0095 #endif
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