/******************************************************************************* * Author : Angus Johnson * * Date : 24 March 2024 * * Website : http://www.angusj.com * * Copyright : Angus Johnson 2010-2024 * * License : http://www.boost.org/LICENSE_1_0.txt * *******************************************************************************/ #include #include #include #include #include #include #include "clipper.svg.h" namespace Clipper2Lib { const char svg_xml_header_0[] = "\n" "\n\n \n"; file.close(); setlocale(LC_NUMERIC, ""); return true; } //------------------------------------------------------------------------------ //------------------------------------------------------------------------------ bool SkipBlanks(std::string::const_iterator& si, const std::string::const_iterator se) { while (si != se && *si <= ' ') ++si; return si != se; } //------------------------------------------------------------------------------ bool GetNum(std::string::const_iterator& si, const std::string::const_iterator se, double& value) { while (si != se && *si <= ' ') ++si; if (si != se && *si == ',') ++si; while (si != se && *si <= ' ') ++si; if (si == se) return false; std::string::const_iterator sit = si; while ((si != se && (*si <= ' ')) || *si == ',') ++si; bool isneg = *si == '-'; if (isneg) ++si; value = 0; int loop_cnt = 0, decpos = -1; while (si != se) { if (*si == '.') { if (loop_cnt == 0 || decpos >= 0) return false; //invalid else decpos = loop_cnt; } else if (*si < '0' || *si > '9') break; else value = value * 10 + (long)(*si) - (long)'0'; ++si; loop_cnt++; } if (decpos >= 0) { decpos = loop_cnt - decpos - 1; value *= pow(10, -decpos); } if (isneg) value = -value; return si != sit; } //------------------------------------------------------------------------------ bool GetCommand(std::string::const_iterator& si, char& command, bool& is_relative) { if (*si >= 'a' && *si <= 'z') { is_relative = true; command = toupper(*si); } else if (*si >= 'A' && *si <= 'Z') { command = *si; is_relative = false; } else return false; //ie leave command and is_relative unchanged! ++si; //only increment the offset with a valid command return true; } //------------------------------------------------------------------------------ inline bool Find(const std::string& text, std::string::const_iterator& start, const std::string::const_iterator& end) { start = std::search(start, end, text.cbegin(), text.cend()); return start != end; } //------------------------------------------------------------------------------ bool SvgReader::LoadPath(std::string::const_iterator& p, const std::string::const_iterator& pe) { if (!Find("d=\"", p, pe)) return false; p += 3; if (!SkipBlanks(p, pe)) return false; char command; bool is_relative; int vals_needed = 2; //nb: M == absolute move, m == relative move if (!GetCommand(p, command, is_relative) || command != 'M') return false; double vals[2] { 0, 0 }; double x = 0, y = 0; ++p; if (!GetNum(p, pe, x) || !GetNum(p, pe, y)) return false; PathsD ppp; PathD pp; pp.push_back(PointD(x, y)); while (SkipBlanks(p, pe)) { if (GetCommand(p, command, is_relative)) { switch (command) { case 'L': case 'M': {vals_needed = 2; break; } case 'H': case 'V': {vals_needed = 1; break; } case 'Z': { if (pp.size() > 2) ppp.push_back(pp); pp.clear(); vals_needed = 0; break; } default: vals_needed = -1; } if (vals_needed < 0) break; //oops! } else { for (int i = 0; i < vals_needed; ++i) if (!GetNum(p, pe, vals[i])) vals_needed = -1; if (vals_needed <= 0) break; //oops! switch (vals_needed) { case 1: { if (command == 'V') y = (is_relative ? y + vals[0] : vals[0]); else x = (is_relative ? x + vals[0] : vals[0]); break; } case 2: { x = (is_relative ? x + vals[0] : vals[0]); y = (is_relative ? y + vals[1] : vals[1]); break; } default: break; } pp.push_back(PointD(x, y)); } } if (pp.size() > 3) ppp.push_back(pp); //todo - fix fillrule path_infos.push_back(new PathInfo(ppp, false, FillRule::EvenOdd, 0, 0xFF000000, 1, false)); return (ppp.size() > 0); } bool SvgReader::LoadFromFile(const std::string &filename) { Clear(); std::ifstream file(filename); if (!file.good()) return false; std::stringstream xml_buff; xml_buff << file.rdbuf(); file.close(); xml = xml_buff.str(); std::string::const_iterator p = xml.cbegin(), q, xml_end = xml.cend(); while (Find("", p, xml_end)) break; LoadPath(q, p); p += 2; } return path_infos.size() > 0; } PathsD SvgReader::GetPaths() { PathsD result; for (size_t i = 0; i < path_infos.size(); ++i) for (size_t j = 0; j < path_infos[i]->paths_.size(); ++j) result.push_back(path_infos[i]->paths_[j]); return result; } } //namespace