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index 3006508111a02f3b9742e484cfe9e0172930784e..0baaf521ea59b1fbda10628f359c545489d6c07f 100644 (file)
--- a/src/svg/path-string.cpp
+++ b/src/svg/path-string.cpp
*/
#include "svg/path-string.h"
-#include "prefs-utils.h"
+#include "svg/stringstream.h"
+#include "svg/svg.h"
+#include "preferences.h"
+#include <algorithm>
+
+// 1<=numericprecision<=16, doubles are only accurate upto (slightly less than) 16 digits (and less than one digit doesn't make sense)
+// Please note that these constants are used to allocate sufficient space to hold serialized numbers
+static int const minprec = 1;
+static int const maxprec = 16;
+
+int Inkscape::SVG::PathString::numericprecision;
+int Inkscape::SVG::PathString::minimumexponent;
Inkscape::SVG::PathString::PathString() :
- allow_relative_coordinates(0 != prefs_get_int_attribute("options.svgoutput", "allowrelativecoordinates", 1)),
- force_repeat_commands(0 != prefs_get_int_attribute("options.svgoutput", "forcerepeatcommands", 0))
-{}
+ allow_relative_coordinates(Inkscape::Preferences::get()->getBool("/options/svgoutput/allowrelativecoordinates", true)),
+ force_repeat_commands(Inkscape::Preferences::get()->getBool("/options/svgoutput/forcerepeatcommands"))
+{
+ Inkscape::Preferences *prefs = Inkscape::Preferences::get();
+ numericprecision = std::max<int>(minprec,std::min<int>(maxprec, prefs->getInt("/options/svgoutput/numericprecision", 8)));
+ minimumexponent = prefs->getInt("/options/svgoutput/minimumexponent", -8);
+}
void Inkscape::SVG::PathString::_appendOp(char abs_op, char rel_op) {
bool abs_op_repeated = _abs_state.prevop == abs_op && !force_repeat_commands;
unsigned int const abs_added_size = abs_op_repeated ? 0 : 2;
unsigned int const rel_added_size = rel_op_repeated ? 0 : 2;
if ( _rel_state.str.size()+2 < _abs_state.str.size()+abs_added_size && allow_relative_coordinates ) {
+ // Store common prefix
+ commonbase += _rel_state.str;
+ _rel_state.str.clear();
// Copy rel to abs
_abs_state = _rel_state;
_abs_state.switches++;
// _rel_state.str.size()+rel_added_size < _abs_state.str.size()+2
// _abs_state.str.size()+2 > _rel_state.str.size()+rel_added_size
} else if ( _abs_state.str.size()+2 < _rel_state.str.size()+rel_added_size ) {
+ // Store common prefix
+ commonbase += _abs_state.str;
+ _abs_state.str.clear();
// Copy abs to rel
_rel_state = _abs_state;
_abs_state.switches++;
if ( !rel_op_repeated ) _rel_state.appendOp(rel_op);
}
+void Inkscape::SVG::PathString::State::append(Geom::Coord v) {
+ str += ' ';
+ appendNumber(v);
+}
+
+void Inkscape::SVG::PathString::State::append(Geom::Point p) {
+ str += ' ';
+ appendNumber(p[Geom::X]);
+ str += ',';
+ appendNumber(p[Geom::Y]);
+}
+
+void Inkscape::SVG::PathString::State::append(Geom::Coord v, Geom::Coord& rv) {
+ str += ' ';
+ appendNumber(v, rv);
+}
+
+void Inkscape::SVG::PathString::State::append(Geom::Point p, Geom::Point &rp) {
+ str += ' ';
+ appendNumber(p[Geom::X], rp[Geom::X]);
+ str += ',';
+ appendNumber(p[Geom::Y], rp[Geom::Y]);
+}
+
+// NOTE: The following appendRelativeCoord function will not be exact if the total number of digits needed
+// to represent the difference exceeds the precision of a double. This is not very likely though, and if
+// it does happen the imprecise value is not likely to be chosen (because it will probably be a lot longer
+// than the absolute value).
+
+// NOTE: This assumes v and r are already rounded (this includes flushing to zero if they are < 10^minexp)
+void Inkscape::SVG::PathString::State::appendRelativeCoord(Geom::Coord v, Geom::Coord r) {
+ int const minexp = minimumexponent-numericprecision+1;
+ int const digitsEnd = (int)floor(log10(std::min(fabs(v),fabs(r)))) - numericprecision; // Position just beyond the last significant digit of the smallest (in absolute sense) number
+ double const roundeddiff = floor((v-r)*pow(10.,-digitsEnd-1)+.5);
+ int const numDigits = (int)floor(log10(fabs(roundeddiff)))+1; // Number of digits in roundeddiff
+ if (r == 0) {
+ appendNumber(v, numericprecision, minexp);
+ } else if (v == 0) {
+ appendNumber(-r, numericprecision, minexp);
+ } else if (numDigits>0) {
+ appendNumber(v-r, numDigits, minexp);
+ } else {
+ // This assumes the input numbers are already rounded to 'precision' digits
+ str += '0';
+ }
+}
+
+void Inkscape::SVG::PathString::State::appendRelative(Geom::Point p, Geom::Point r) {
+ str += ' ';
+ appendRelativeCoord(p[Geom::X], r[Geom::X]);
+ str += ',';
+ appendRelativeCoord(p[Geom::Y], r[Geom::Y]);
+}
+
+void Inkscape::SVG::PathString::State::appendRelative(Geom::Coord v, Geom::Coord r) {
+ str += ' ';
+ appendRelativeCoord(v, r);
+}
+
+void Inkscape::SVG::PathString::State::appendNumber(double v, int precision, int minexp) {
+ size_t const reserve = precision+1+1+1+1+3; // Just large enough to hold the maximum number of digits plus a sign, a period, the letter 'e', another sign and three digits for the exponent
+ size_t const oldsize = str.size();
+ str.append(reserve, (char)0);
+ char* begin_of_num = const_cast<char*>(str.data()+oldsize); // Slightly evil, I know (but std::string should be storing its data in one big block of memory, so...)
+ size_t added = sp_svg_number_write_de(begin_of_num, v, precision, minexp);
+ str.resize(oldsize+added); // remove any trailing characters
+}
+
+void Inkscape::SVG::PathString::State::appendNumber(double v, double &rv, int precision, int minexp) {
+ size_t const oldsize = str.size();
+ appendNumber(v, precision, minexp);
+ char* begin_of_num = const_cast<char*>(str.data()+oldsize); // Slightly evil, I know (but std::string should be storing its data in one big block of memory, so...)
+ sp_svg_number_read_d(begin_of_num, &rv);
+}
+
/*
Local Variables:
mode:c++