summaryrefslogtreecommitdiff
path: root/Build/source/texk/dvisvgm/dvisvgm-1.0.8/src/TpicSpecialHandler.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'Build/source/texk/dvisvgm/dvisvgm-1.0.8/src/TpicSpecialHandler.cpp')
-rw-r--r--Build/source/texk/dvisvgm/dvisvgm-1.0.8/src/TpicSpecialHandler.cpp315
1 files changed, 315 insertions, 0 deletions
diff --git a/Build/source/texk/dvisvgm/dvisvgm-1.0.8/src/TpicSpecialHandler.cpp b/Build/source/texk/dvisvgm/dvisvgm-1.0.8/src/TpicSpecialHandler.cpp
new file mode 100644
index 00000000000..fcd33a5bcf5
--- /dev/null
+++ b/Build/source/texk/dvisvgm/dvisvgm-1.0.8/src/TpicSpecialHandler.cpp
@@ -0,0 +1,315 @@
+/*************************************************************************
+** TpicSpecialHandler.cpp **
+** **
+** This file is part of dvisvgm -- the DVI to SVG converter **
+** Copyright (C) 2005-2011 Martin Gieseking <martin.gieseking@uos.de> **
+** **
+** This program is free software; you can redistribute it and/or **
+** modify it under the terms of the GNU General Public License as **
+** published by the Free Software Foundation; either version 3 of **
+** the License, or (at your option) any later version. **
+** **
+** This program is distributed in the hope that it will be useful, but **
+** WITHOUT ANY WARRANTY; without even the implied warranty of **
+** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the **
+** GNU General Public License for more details. **
+** **
+** You should have received a copy of the GNU General Public License **
+** along with this program; if not, see <http://www.gnu.org/licenses/>. **
+*************************************************************************/
+
+#include <cmath>
+#include <cstring>
+#include <sstream>
+#include "Color.h"
+#include "InputBuffer.h"
+#include "InputReader.h"
+#include "SpecialActions.h"
+#include "TpicSpecialHandler.h"
+#include "XMLNode.h"
+#include "XMLString.h"
+#include "types.h"
+
+using namespace std;
+
+
+TpicSpecialHandler::TpicSpecialHandler () {
+ reset();
+}
+
+
+void TpicSpecialHandler::dviEndPage () {
+ reset();
+}
+
+
+void TpicSpecialHandler::reset () {
+ _points.clear();
+ _penwidth = 1.0;
+ _fill = -1.0; // no fill
+}
+
+
+/** Creates SVG elements that draw lines through the recorded points.
+ * @param[in] stroke if true, the (out)line is drawn (in black)
+ * @param[in] fill if true, enclosed area is filled with current color
+ * @param[in] ddist dash/dot distance of line in TeX point units
+ * (0:solid line, >0:dashed line, <0:dotted line) */
+void TpicSpecialHandler::drawLines (bool stroke, bool fill, double ddist, SpecialActions *actions) {
+ if (actions && _points.size() > 0) {
+ XMLElementNode *elem=0;
+ if (_points.size() == 1) {
+ const DPair &p = _points.back();
+ elem = new XMLElementNode("circle");
+ elem->addAttribute("cx", p.x()+actions->getX());
+ elem->addAttribute("cy", p.y()+actions->getY());
+ elem->addAttribute("r", _penwidth/2.0);
+ actions->embed(p, _penwidth/2.0);
+ }
+ else {
+ if (_points.size() == 2 || (!fill && _points.front() != _points.back())) {
+ elem = new XMLElementNode("polyline");
+ elem->addAttribute("fill", "none");
+ elem->addAttribute("stroke-linecap", "round");
+ }
+ else {
+ if (_points.front() == _points.back())
+ _points.pop_back();
+ if (_fill < 0)
+ _fill = 1;
+ Color color = actions->getColor();
+ color *= _fill;
+ elem = new XMLElementNode("polygon");
+ elem->addAttribute("fill", fill ? color.rgbString() : "none");
+ }
+ ostringstream oss;
+ FORALL(_points, vector<DPair>::iterator, it) {
+ if (it != _points.begin())
+ oss << ' ';
+ double x = it->x()+actions->getX();
+ double y = it->y()+actions->getY();
+ oss << x << ',' << y;
+ actions->embed(DPair(x, y));
+ }
+ elem->addAttribute("points", oss.str());
+ if (stroke) { // draw outline?
+ elem->addAttribute("stroke", "black");
+ elem->addAttribute("stroke-width", XMLString(_penwidth));
+ }
+ }
+ if (ddist > 0)
+ elem->addAttribute("stroke-dasharray", XMLString(ddist));
+ else if (ddist < 0) {
+ ostringstream oss;
+ oss << _penwidth << ' ' << -ddist;
+ elem->addAttribute("stroke-dasharray", oss.str());
+ }
+ actions->appendToPage(elem);
+ }
+ reset();
+}
+
+
+void TpicSpecialHandler::drawSplines (double ddist, SpecialActions *actions) {
+ if (actions && _points.size() > 0) {
+ const size_t size = _points.size();
+ if (size < 3)
+ drawLines(true, false, ddist, actions);
+ else {
+ double x = actions->getX();
+ double y = actions->getY();
+ DPair p(x,y);
+ ostringstream oss;
+ oss << 'M' << x+_points[0].x() << ',' << y+_points[0].y();
+ DPair mid = p+_points[0]+(_points[1]-_points[0])/2.0;
+ oss << 'L' << mid.x() << ',' << mid.y();
+ actions->embed(p+_points[0]);
+ for (size_t i=1; i < size-1; i++) {
+ const DPair p0 = p+_points[i-1];
+ const DPair p1 = p+_points[i];
+ const DPair p2 = p+_points[i+1];
+ mid = p1+(p2-p1)/2.0;
+ oss << 'Q' << p1.x() << ',' << p1.y()
+ << ' ' << mid.x() << ',' << mid.y();
+ actions->embed(mid);
+ actions->embed((p0+p1*6.0+p2)/8.0, _penwidth);
+ }
+ if (_points[0] == _points[size-1]) // closed path?
+ oss << 'Z';
+ else {
+ oss << 'L' << x+_points[size-1].x() << ',' << y+_points[size-1].y();
+ actions->embed(p+_points[size-1]);
+ }
+
+ Color color = actions->getColor();
+ color *= _fill;
+ XMLElementNode *path = new XMLElementNode("path");
+ if (_fill >= 0) {
+ if (_points[0] != _points[size-1])
+ oss << 'Z';
+ path->addAttribute("fill", color.rgbString());
+ }
+ else
+ path->addAttribute("fill", "none");
+
+ path->addAttribute("d", oss.str());
+ path->addAttribute("stroke", actions->getColor().rgbString());
+ path->addAttribute("stroke-width", XMLString(_penwidth));
+ if (ddist > 0)
+ path->addAttribute("stroke-dasharray", XMLString(ddist));
+ else if (ddist < 0) {
+ ostringstream oss;
+ oss << _penwidth << ' ' << -ddist;
+ path->addAttribute("stroke-dasharray", oss.str());
+ }
+ actions->appendToPage(path);
+ }
+ }
+ reset();
+}
+
+
+void TpicSpecialHandler::drawArc (double cx, double cy, double rx, double ry, double angle1, double angle2, SpecialActions *actions) {
+ if (actions) {
+ const double PI2 = 4*asin(1.0);
+ angle1 *= -1;
+ angle2 *= -1;
+ if (fabs(angle1) > PI2) {
+ int n = (int) (angle1/PI2);
+ angle1 = angle1 - n*PI2;
+ angle2 = angle2 - n*PI2;
+ }
+
+ double x = cx + actions->getX();
+ double y = cy + actions->getY();
+ XMLElementNode *elem=0;
+ if (fabs(angle1-angle2) >= PI2) { // closed ellipse?
+ elem = new XMLElementNode("ellipse");
+ elem->addAttribute("cx", XMLString(x));
+ elem->addAttribute("cy", XMLString(y));
+ elem->addAttribute("rx", XMLString(rx));
+ elem->addAttribute("ry", XMLString(ry));
+ }
+ else {
+ if (angle1 < 0)
+ angle1 = PI2+angle1;
+ if (angle2 < 0)
+ angle2 = PI2+angle2;
+ elem = new XMLElementNode("path");
+ int large_arg = fabs(angle1-angle2) > PI2/2 ? 0 : 1;
+ int sweep = angle1 > angle2 ? 0 : 1;
+ if (angle1 > angle2) {
+ large_arg = 1-large_arg;
+ sweep = 1-sweep;
+ }
+ ostringstream oss;
+ oss << 'M' << x+rx*cos(angle1) << ',' << y+ry*sin(-angle1)
+ << 'A' << rx << ',' << ry
+ << " 0 "
+ << large_arg << ' ' << sweep << ' '
+ << x+rx*cos(angle2) << ',' << y-ry*sin(angle2);
+ if (_fill >= 0)
+ oss << 'Z';
+ elem->addAttribute("d", oss.str());
+ }
+ elem->addAttribute("stroke-width", _penwidth);
+ elem->addAttribute("stroke", actions->getColor().rgbString());
+ elem->addAttribute("stroke-linecap", "round");
+ elem->addAttribute("fill", "none");
+ if (_fill >= 0) {
+ Color color=actions->getColor();
+ color *= _fill;
+ elem->addAttribute("fill", color.rgbString());
+ }
+ else
+ elem->addAttribute("fill", "none");
+ actions->appendToPage(elem);
+ actions->embed(BoundingBox(cx-rx, cy-ry, cx+rx, cy+ry));
+ }
+ reset();
+}
+
+
+#define cmd_id(c1,c2) ((c1 << 8) | c2)
+
+bool TpicSpecialHandler::process (const char *prefix, istream &is, SpecialActions *actions) {
+ if (!prefix || strlen(prefix) != 2)
+ return false;
+
+ const double PT=0.07227; // factor for milli-inch to TeX points
+ StreamInputBuffer ib(is);
+ BufferInputReader in(ib);
+ switch (cmd_id(prefix[0], prefix[1])) {
+ case cmd_id('p','n'): // set pen width in milli-inches
+ _penwidth = in.getDouble()*PT;
+ break;
+ case cmd_id('b','k'): // set fill color to black
+ _fill = 0;
+ break;
+ case cmd_id('w','h'): // set fill color to white
+ _fill = 1;
+ break;
+ case cmd_id('s','h'): // set fill color to given gray level
+ in.skipSpace();
+ _fill = in.eof() ? 0.5 : max(0.0, min(1.0, in.getDouble()));
+ break;
+ case cmd_id('t','x'): // set fill pattern
+ break;
+ case cmd_id('p','a'): { // add point to path
+ double x=in.getDouble()*PT;
+ double y=in.getDouble()*PT;
+ _points.push_back(DPair(x,y));
+ break;
+ }
+ case cmd_id('f','p'): // draw solid lines through recorded points; close and fill path if fill color was defined
+ drawLines(true, _fill >= 0, 0, actions);
+ break;
+ case cmd_id('i','p'): // don't draw outlines but close the recorded path and fill the resulting polygon
+ drawLines(false, true, 0, actions);
+ break;
+ case cmd_id('d','a'): // as fp but draw dashed lines
+ drawLines(true, _fill >= 0, in.getDouble()*72.27, actions);
+ break;
+ case cmd_id('d','t'): // as fp but draw dotted lines
+ drawLines(true, _fill >= 0, -in.getDouble()*72.27, actions);
+ break;
+ case cmd_id('s','p'): { // draw quadratic splines through recorded points
+ double ddist = in.getDouble();
+ drawSplines(ddist, actions);
+ break;
+ }
+ case cmd_id('a','r'): { // draw elliptical arc
+ double cx = in.getDouble()*PT;
+ double cy = in.getDouble()*PT;
+ double rx = in.getDouble()*PT;
+ double ry = in.getDouble()*PT;
+ double a1 = in.getDouble();
+ double a2 = in.getDouble();
+ drawArc(cx, cy, rx, ry, a1, a2, actions);
+ break;
+ }
+ case cmd_id('i','a'): { // fill elliptical arc
+ double cx = in.getDouble()*PT;
+ double cy = in.getDouble()*PT;
+ double rx = in.getDouble()*PT;
+ double ry = in.getDouble()*PT;
+ double a1 = in.getDouble();
+ double a2 = in.getDouble();
+ if (_fill < 0)
+ _fill = 1;
+ drawArc(cx, cy, rx, ry, a1, a2, actions);
+ if (_fill < 0)
+ _fill = -1;
+ break;
+ }
+ default:
+ return false;
+ }
+ return true;
+}
+
+
+const char** TpicSpecialHandler::prefixes () const {
+ static const char *pfx[] = {"ar", "bk", "da", "dt", "fp", "ia", "ip", "pa", "pn", "sh", "sp", "tx", "wh", 0};
+ return pfx;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-28 04:29:34 +0000