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|
/*************************************************************************
** PsSpecialHandler.cpp **
** **
** This file is part of dvisvgm -- the DVI to SVG converter **
** Copyright (C) 2005-2014 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 <config.h>
#include <cmath>
#include <fstream>
#include <iostream>
#include <sstream>
#include "EPSFile.h"
#include "FileFinder.h"
#include "Ghostscript.h"
#include "Message.h"
#include "PSPattern.h"
#include "PSPreviewFilter.h"
#include "PsSpecialHandler.h"
#include "SpecialActions.h"
#include "XMLNode.h"
#include "XMLString.h"
using namespace std;
static inline double str2double (const string &str) {
double ret;
istringstream iss(str);
iss >> ret;
return ret;
}
PsSpecialHandler::PsSpecialHandler () : _psi(this), _actions(0), _previewFilter(_psi), _psSection(PS_NONE), _xmlnode(0)
{
}
PsSpecialHandler::~PsSpecialHandler () {
_psi.setActions(0); // ensure no further PS actions are performed
for (map<int, PSPattern*>::iterator it=_patterns.begin(); it != _patterns.end(); ++it)
delete it->second;
}
/** Initializes the PostScript handler. It's called by the first use of process(). The
* deferred initialization speeds up the conversion of DVI files that doesn't contain
* PS specials. */
void PsSpecialHandler::initialize () {
if (_psSection == PS_NONE) {
// initial values of graphics state
_linewidth = 1;
_linecap = _linejoin = 0;
_miterlimit = 4;
_xmlnode = _savenode = 0;
_opacityalpha = 1; // fully opaque
_sx = _sy = _cos = 1.0;
_pattern = 0;
// execute dvips prologue/header files
const char *headers[] = {"tex.pro", "texps.pro", "special.pro", /*"color.pro",*/ 0};
for (const char **p=headers; *p; ++p)
processHeaderFile(*p);
_psSection = PS_HEADERS; // allow to process header specials now
}
}
void PsSpecialHandler::processHeaderFile (const char *name) {
if (const char *path = FileFinder::lookup(name, false)) {
ifstream ifs(path);
_psi.execute(string("%%BeginProcSet: ")+name+" 0 0\n", false);
_psi.execute(ifs, false);
_psi.execute("%%EndProcSet\n", false);
}
else
Message::wstream(true) << "PostScript header file " << name << " not found\n";
}
void PsSpecialHandler::enterBodySection () {
if (_psSection == PS_HEADERS) {
_psSection = PS_BODY; // don't process any PS header code
ostringstream oss;
// process collected header code
if (!_headerCode.empty()) {
oss << "\nTeXDict begin @defspecial " << _headerCode << "\n@fedspecial end";
_headerCode.clear();
}
// push dictionary "TeXDict" with dvips definitions on dictionary stack
// and initialize basic dvips PostScript variables
oss << "\nTeXDict begin 0 0 1000 72 72 () @start 0 0 moveto ";
if (_actions) {
float r, g, b;
_actions->getColor().getRGB(r, g, b);
oss << r << ' ' << g << ' ' << b << " setrgbcolor ";
}
_psi.execute(oss.str(), false);
// Check for information generated by preview.sty. If the tightpage options
// was set, don't execute the bop-hook but allow the PS filter to read
// the bbox data present at the beginning of the page.
_psi.setFilter(&_previewFilter);
_previewFilter.activate();
if (!_previewFilter.tightpage())
_psi.execute("userdict/bop-hook known{bop-hook}if\n", false);
}
}
/** Move PS graphic position to current DVI location. */
void PsSpecialHandler::moveToDVIPos () {
if (_actions) {
const double x = _actions->getX();
const double y = _actions->getY();
ostringstream oss;
oss << '\n' << x << ' ' << y << " moveto ";
_psi.execute(oss.str());
_currentpoint = DPair(x, y);
}
}
/** Executes a PS snippet and moves the DVI cursor to the current DVI position afterwards.
* It's just a shorthand function as this action sequence is required several times.
* @param[in] psi PS interpreter instance
* @param[in] is stream to read the PS code from
* @param[in] pos current PS graphic position
* @param[in] actions special actions */
static void exec_and_syncpos (PSInterpreter &psi, istream &is, const DPair &pos, SpecialActions *actions) {
psi.execute(is);
psi.execute("\nquerypos "); // retrieve current PS position (stored in 'pos')
if (actions) {
actions->setX(pos.x());
actions->setY(pos.y());
}
}
bool PsSpecialHandler::process (const char *prefix, istream &is, SpecialActions *actions) {
_actions = actions;
initialize();
if (_psSection != PS_BODY && *prefix != '!' && strcmp(prefix, "header=") != 0)
enterBodySection();
if (*prefix == '"') {
// read and execute literal PostScript code (isolated by a wrapping save/restore pair)
moveToDVIPos();
_psi.execute("\n@beginspecial @setspecial ");
_psi.execute(is);
_psi.execute("\n@endspecial ");
}
else if (*prefix == '!') {
if (_psSection == PS_HEADERS) {
_headerCode += "\n";
_headerCode += string(istreambuf_iterator<char>(is), istreambuf_iterator<char>());
}
}
else if (strcmp(prefix, "header=") == 0) {
if (_psSection == PS_HEADERS) {
// read and execute PS header file
string fname;
is >> fname;
processHeaderFile(fname.c_str());
}
}
else if (strcmp(prefix, "psfile=") == 0 || strcmp(prefix, "PSfile=") == 0) {
if (_actions) {
StreamInputReader in(is);
string fname = in.getQuotedString(in.peek() == '"' ? '"' : 0);
map<string,string> attr;
in.parseAttributes(attr);
psfile(fname, attr);
}
}
else if (strcmp(prefix, "ps::") == 0) {
if (_actions)
_actions->finishLine(); // reset DVI position on next DVI command
if (is.peek() == '[') {
// collect characters inside the brackets
string code;
for (int i=0; i < 9 && is.peek() != ']' && !is.eof(); ++i)
code += is.get();
if (is.peek() == ']')
code += is.get();
if (code == "[begin]" || code == "[nobreak]") {
moveToDVIPos();
exec_and_syncpos(_psi, is, _currentpoint, _actions);
}
else {
// no move to DVI position here
if (code != "[end]") // PS array?
_psi.execute(code);
exec_and_syncpos(_psi, is, _currentpoint, _actions);
}
}
else { // ps::<code> behaves like ps::[end]<code>
// no move to DVI position here
exec_and_syncpos(_psi, is, _currentpoint, _actions);
}
}
else { // ps: ...
if (_actions)
_actions->finishLine();
moveToDVIPos();
StreamInputReader in(is);
if (in.check(" plotfile ")) { // ps: plotfile fname
string fname = in.getString();
ifstream ifs(fname.c_str());
if (ifs)
_psi.execute(ifs);
else
Message::wstream(true) << "file '" << fname << "' not found in ps: plotfile\n";
}
else {
// ps:<code> is almost identical to ps::[begin]<code> but does
// a final repositioning to the current DVI location
exec_and_syncpos(_psi, is, _currentpoint, _actions);
moveToDVIPos();
}
}
return true;
}
/** Handles psfile special.
* @param[in] fname EPS file to be included
* @param[in] attr attributes given with \\special psfile */
void PsSpecialHandler::psfile (const string &fname, const map<string,string> &attr) {
EPSFile epsfile(fname);
istream &is = epsfile.istream();
if (!is)
Message::wstream(true) << "file '" << fname << "' not found in special 'psfile'\n";
else {
map<string,string>::const_iterator it;
// bounding box of EPS figure
double llx = (it = attr.find("llx")) != attr.end() ? str2double(it->second) : 0;
double lly = (it = attr.find("lly")) != attr.end() ? str2double(it->second) : 0;
double urx = (it = attr.find("urx")) != attr.end() ? str2double(it->second) : 0;
double ury = (it = attr.find("ury")) != attr.end() ? str2double(it->second) : 0;
// desired width/height of resulting figure
double rwi = (it = attr.find("rwi")) != attr.end() ? str2double(it->second)/10.0 : -1;
double rhi = (it = attr.find("rhi")) != attr.end() ? str2double(it->second)/10.0 : -1;
if (rwi == 0 || rhi == 0 || urx-llx == 0 || ury-lly == 0)
return;
// user transformations (default values chosen according to dvips manual)
double hoffset = (it = attr.find("hoffset")) != attr.end() ? str2double(it->second) : 0;
double voffset = (it = attr.find("voffset")) != attr.end() ? str2double(it->second) : 0;
// double hsize = (it = attr.find("hsize")) != attr.end() ? str2double(it->second) : 612;
// double vsize = (it = attr.find("vsize")) != attr.end() ? str2double(it->second) : 792;
double hscale = (it = attr.find("hscale")) != attr.end() ? str2double(it->second) : 100;
double vscale = (it = attr.find("vscale")) != attr.end() ? str2double(it->second) : 100;
double angle = (it = attr.find("angle")) != attr.end() ? str2double(it->second) : 0;
Matrix m(1);
m.rotate(angle).scale(hscale/100, vscale/100).translate(hoffset, voffset);
BoundingBox bbox(llx, lly, urx, ury);
bbox.transform(m);
double sx = rwi/bbox.width();
double sy = rhi/bbox.height();
if (sx < 0) sx = sy;
if (sy < 0) sy = sx;
if (sx < 0) sx = sy = 1.0;
// save current DVI position (in pt units)
const double x = _actions->getX();
const double y = _actions->getY();
// all following drawings are relative to (0,0)
_actions->setX(0);
_actions->setY(0);
moveToDVIPos();
_xmlnode = new XMLElementNode("g");
_psi.execute("\n@beginspecial @setspecial "); // enter \special environment
_psi.limit(epsfile.pslength()); // limit the number of bytes to be processed
_psi.execute(is); // process EPS file
_psi.limit(0); // disable limitation
_psi.execute("\n@endspecial "); // leave special environment
if (!_xmlnode->empty()) { // has anything been drawn?
Matrix m(1);
m.rotate(angle).scale(hscale/100, vscale/100).translate(hoffset, voffset);
m.translate(-llx, lly);
m.scale(sx, sy); // resize image to width "rwi" and height "rhi"
m.translate(x, y); // move image to current DVI position
_xmlnode->addAttribute("transform", m.getSVG());
_actions->appendToPage(_xmlnode);
}
else
delete _xmlnode;
_xmlnode = 0;
// restore DVI position
_actions->setX(x);
_actions->setY(y);
moveToDVIPos();
// update bounding box
m.scale(sx, -sy);
m.translate(x, y);
bbox = BoundingBox(0, 0, fabs(urx-llx), fabs(ury-lly));
bbox.transform(m);
_actions->embed(bbox);
}
}
/** Apply transformation to width, height, and depth set by preview package.
* @param[in] matrix transformation matrix to apply
* @param[out] w width
* @param[out] h height
* @param[out] d depth
* @return true if the baseline is still horizontal after the transformation */
static bool transform_box_extents (const Matrix &matrix, double &w, double &h, double &d) {
DPair shift = matrix*DPair(0,0); // the translation component of the matrix
DPair ex = matrix*DPair(1,0)-shift;
DPair ey = matrix*DPair(0,1)-shift;
if (ex.y() != 0 && ey.x() != 0) // rotation != mod 90 degrees?
return false; // => non-horizontal baseline, can't compute meaningful extents
if (ex.y() == 0) // horizontal scaling or skewing?
w *= fabs(ex.x());
if (ey.x()==0 || ex.y()==0) { // vertical scaling?
if (ey.y() < 0) swap(h, d);
if (double sy = fabs(ey.y())/ey.length()) {
h *= fabs(ey.y()/sy);
d *= fabs(ey.y()/sy);
}
else
h = d = 0;
}
return true;
}
void PsSpecialHandler::dviEndPage (unsigned) {
BoundingBox bbox;
if (_previewFilter.getBoundingBox(bbox)) {
double w = _previewFilter.width();
double h = _previewFilter.height();
double d = _previewFilter.depth();
bool horiz_baseline = true;
if (_actions) {
_actions->bbox() = bbox;
// apply page transformations to box extents
Matrix pagetrans;
_actions->getPageTransform(pagetrans);
horiz_baseline = transform_box_extents(pagetrans, w, h, d);
_actions->bbox().lock();
}
Message::mstream() << "\napplying bounding box set by preview package (version " << _previewFilter.version() << ")\n";
if (horiz_baseline)
Message::mstream() << "width=" << XMLString(w) << "pt, " "height=" << XMLString(h) << "pt, " "depth=" << XMLString(d) << "pt\n";
else
Message::mstream() << "can't determine height, width, and depth due to non-horizontal baseline\n";
}
// close dictionary TeXDict and execute end-hook if defined
if (_psSection == PS_BODY) {
_psi.execute("\nend userdict/end-hook known{end-hook}if ");
_psSection = PS_HEADERS;
}
}
///////////////////////////////////////////////////////
void PsSpecialHandler::gsave (vector<double> &p) {
_clipStack.dup();
}
void PsSpecialHandler::grestore (vector<double> &p) {
_clipStack.pop();
}
void PsSpecialHandler::grestoreall (vector<double> &p) {
_clipStack.pop(-1, true);
}
void PsSpecialHandler::save (vector<double> &p) {
_clipStack.dup(static_cast<int>(p[0]));
}
void PsSpecialHandler::restore (vector<double> &p) {
_clipStack.pop(static_cast<int>(p[0]));
}
void PsSpecialHandler::moveto (vector<double> &p) {
_path.moveto(p[0], p[1]);
}
void PsSpecialHandler::lineto (vector<double> &p) {
_path.lineto(p[0], p[1]);
}
void PsSpecialHandler::curveto (vector<double> &p) {
_path.cubicto(p[0], p[1], p[2], p[3], p[4], p[5]);
}
void PsSpecialHandler::closepath (vector<double> &p) {
_path.closepath();
}
/** Draws the current path recorded by previously executed path commands (moveto, lineto,...).
* @param[in] p not used */
void PsSpecialHandler::stroke (vector<double> &p) {
if (!_path.empty() && _actions) {
BoundingBox bbox;
if (!_actions->getMatrix().isIdentity()) {
_path.transform(_actions->getMatrix());
if (!_xmlnode)
bbox.transform(_actions->getMatrix());
}
XMLElementNode *path=0;
Pair<double> point;
if (_path.isDot(point)) { // zero-length path?
if (_linecap == 1) { // round line ends? => draw dot
double x = point.x();
double y = point.y();
double r = _linewidth/2.0;
path = new XMLElementNode("circle");
path->addAttribute("cx", x);
path->addAttribute("cy", y);
path->addAttribute("r", r);
path->addAttribute("fill", _actions->getColor().rgbString());
bbox = BoundingBox(x-r, y-r, x+r, y+r);
}
}
else {
// compute bounding box
_path.computeBBox(bbox);
bbox.expand(_linewidth/2);
ostringstream oss;
_path.writeSVG(oss);
path = new XMLElementNode("path");
path->addAttribute("d", oss.str());
path->addAttribute("stroke", _actions->getColor().rgbString());
path->addAttribute("fill", "none");
if (_linewidth != 1)
path->addAttribute("stroke-width", _linewidth);
if (_miterlimit != 4)
path->addAttribute("stroke-miterlimit", _miterlimit);
if (_linecap > 0) // default value is "butt", no need to set it explicitly
path->addAttribute("stroke-linecap", _linecap == 1 ? "round" : "square");
if (_linejoin > 0) // default value is "miter", no need to set it explicitly
path->addAttribute("stroke-linejoin", _linecap == 1 ? "round" : "bevel");
if (_opacityalpha < 1)
path->addAttribute("stroke-opacity", _opacityalpha);
if (!_dashpattern.empty()) {
ostringstream oss;
for (size_t i=0; i < _dashpattern.size(); i++) {
if (i > 0)
oss << ',';
oss << XMLString(_dashpattern[i]);
}
path->addAttribute("stroke-dasharray", oss.str());
if (_dashoffset != 0)
path->addAttribute("stroke-dashoffset", _dashoffset);
}
}
if (path && _clipStack.top()) {
// assign clipping path and clip bounding box
path->addAttribute("clip-path", XMLString("url(#clip")+XMLString(_clipStack.topID())+")");
BoundingBox clipbox;
_clipStack.top()->computeBBox(clipbox);
bbox.intersect(clipbox);
}
if (_xmlnode)
_xmlnode->append(path);
else {
_actions->appendToPage(path);
_actions->embed(bbox);
}
_path.newpath();
}
}
/** Draws a closed path filled with the current color.
* @param[in] p not used
* @param[in] evenodd true: use even-odd fill algorithm, false: use nonzero fill algorithm */
void PsSpecialHandler::fill (vector<double> &p, bool evenodd) {
if (!_path.empty() && _actions) {
// compute bounding box
BoundingBox bbox;
_path.computeBBox(bbox);
if (!_actions->getMatrix().isIdentity()) {
_path.transform(_actions->getMatrix());
if (!_xmlnode)
bbox.transform(_actions->getMatrix());
}
ostringstream oss;
_path.writeSVG(oss);
XMLElementNode *path = new XMLElementNode("path");
path->addAttribute("d", oss.str());
if (_pattern)
path->addAttribute("fill", XMLString("url(#")+_pattern->svgID()+")");
else if (_actions->getColor() != Color::BLACK || _savenode)
path->addAttribute("fill", _actions->getColor().rgbString());
if (_clipStack.top()) {
// assign clipping path and clip bounding box
path->addAttribute("clip-path", XMLString("url(#clip")+XMLString(_clipStack.topID())+")");
BoundingBox clipbox;
_clipStack.top()->computeBBox(clipbox);
bbox.intersect(clipbox);
}
if (evenodd) // SVG default fill rule is "nonzero" algorithm
path->addAttribute("fill-rule", "evenodd");
if (_opacityalpha < 1)
path->addAttribute("fill-opacity", _opacityalpha);
if (_xmlnode)
_xmlnode->append(path);
else {
_actions->appendToPage(path);
_actions->embed(bbox);
}
_path.newpath();
}
}
/** Creates a Matrix object out of a given sequence of 6 double values.
* The given values must be arranged in PostScript matrix order.
* @param[in] v vector containing the matrix values
* @param[in] startindex vector index of first component
* @param[out] matrix the generated matrix */
static void create_matrix (vector<double> &v, int startindex, Matrix &matrix) {
// Ensure vector p has 6 elements. If necessary, add missing ones
// using corresponding values of the identity matrix.
if (v.size()-startindex < 6) {
v.resize(6+startindex);
for (int i=v.size()-startindex; i < 6; ++i)
v[i+startindex] = (i%3 ? 0 : 1);
}
// PS matrix [a b c d e f] equals ((a,b,0),(c,d,0),(e,f,1)).
// Since PS uses left multiplications, we must transpose and reorder
// the matrix to ((a,c,e),(b,d,f),(0,0,1)). This is done by the
// following swaps.
swap(v[startindex+1], v[startindex+2]); // => (a, c, b, d, e, f)
swap(v[startindex+2], v[startindex+4]); // => (a, c, e, d, b, f)
swap(v[startindex+3], v[startindex+4]); // => (a, c, e, b, d, f)
matrix.set(v, startindex);
}
/** Starts the definition of a new fill pattern. This operator
* expects 9 parameters for tiling patterns (see PS reference 4.9.2):
* @param[in] p the 9 values defining a tiling pattern (see PS reference 4.9.2):
* 0: pattern type (0:none, 1:tiling, 2:shading)
* 1: pattern ID
* 2-5: lower left and upper right coordinates of pattern box
* 6: horizontal distance of adjacent tiles
* 7: vertical distance of adjacent tiles
* 8: paint type (1: colored pattern, 2: uncolored pattern)
* 9-14: pattern matrix */
void PsSpecialHandler::makepattern (vector<double> &p) {
int pattern_type = static_cast<int>(p[0]);
int id = static_cast<int>(p[1]);
switch (pattern_type) {
case 0:
// pattern definition completed
if (_savenode) {
_xmlnode = _savenode;
_savenode = 0;
}
break;
case 1: { // tiling pattern
BoundingBox bbox(p[2], p[3], p[4], p[5]);
const double &xstep=p[6], &ystep=p[7]; // horizontal and vertical distance of adjacent tiles
int paint_type = static_cast<int>(p[8]);
Matrix matrix; // transformation matrix given together with pattern definition
create_matrix(p, 9, matrix);
matrix.rmultiply(_actions->getMatrix());
PSTilingPattern *pattern=0;
if (paint_type == 1)
pattern = new PSColoredTilingPattern(id, bbox, matrix, xstep, ystep);
else
pattern = new PSUncoloredTilingPattern(id, bbox, matrix, xstep, ystep);
_patterns[id] = pattern;
_savenode = _xmlnode;
_xmlnode = pattern->getContainerNode(); // insert the following SVG elements into this node
break;
}
case 2: {
// define a shading pattern
}
}
}
/** Selects a previously defined fill pattern.
* 0: pattern ID
* 1-3: (optional) RGB values for uncolored tiling patterns
* further parameters depend on the pattern type */
void PsSpecialHandler::setpattern (vector<double> &p) {
int pattern_id = p[0];
Color color;
if (p.size() == 4)
color.set((float)p[1], (float)p[2], (float)p[3]);
map<int,PSPattern*>::iterator it = _patterns.find(pattern_id);
if (it == _patterns.end())
_pattern = 0;
else {
if (PSUncoloredTilingPattern *pattern = dynamic_cast<PSUncoloredTilingPattern*>(it->second))
pattern->setColor(color);
it->second->apply(_actions);
if (PSTilingPattern *pattern = dynamic_cast<PSTilingPattern*>(it->second))
_pattern = pattern;
else
_pattern = 0;
}
}
/** Clears the current clipping path.
* @param[in] p not used */
void PsSpecialHandler::initclip (vector<double> &p) {
_clipStack.push(); // push empty path
}
/** Assigns a new clipping path.
* @param[in] p not used
* @param[in] evenodd true: use even-odd fill algorithm, false: use nonzero fill algorithm */
void PsSpecialHandler::clip (vector<double> &p, bool evenodd) {
// when this method is called, _path contains the clipping path
if (!_path.empty() && _actions) {
if (!_actions->getMatrix().isIdentity())
_path.transform(_actions->getMatrix());
int oldID = _clipStack.topID();
_clipStack.replace(_path);
int newID = _clipStack.topID();
ostringstream oss;
_path.writeSVG(oss);
XMLElementNode *path = new XMLElementNode("path");
path->addAttribute("d", oss.str());
if (evenodd)
path->addAttribute("clip-rule", "evenodd");
XMLElementNode *clip = new XMLElementNode("clipPath");
clip->addAttribute("id", XMLString("clip")+XMLString(newID));
if (oldID)
clip->addAttribute("clip-path", XMLString("url(#clip")+XMLString(oldID)+")");
clip->append(path);
_actions->appendToDefs(clip);
}
}
/** Clears current path */
void PsSpecialHandler::newpath (vector<double> &p) {
_path.newpath();
}
void PsSpecialHandler::setmatrix (vector<double> &p) {
if (_actions) {
Matrix m;
create_matrix(p, 0, m);
_actions->setMatrix(m);
}
}
// In contrast to SVG, PostScript transformations are applied in
// reverse order (M' = T*M). Thus, the transformation matrices must be
// left-multiplied in the following methods scale(), translate() and rotate().
void PsSpecialHandler::scale (vector<double> &p) {
if (_actions) {
Matrix m = _actions->getMatrix();
ScalingMatrix s(p[0], p[1]);
m.lmultiply(s);
_actions->setMatrix(m);
}
}
void PsSpecialHandler::translate (vector<double> &p) {
if (_actions) {
Matrix m = _actions->getMatrix();
TranslationMatrix t(p[0], p[1]);
m.lmultiply(t);
_actions->setMatrix(m);
}
}
void PsSpecialHandler::rotate (vector<double> &p) {
if (_actions) {
Matrix m = _actions->getMatrix();
RotationMatrix r(p[0]);
m.lmultiply(r);
_actions->setMatrix(m);
}
}
void PsSpecialHandler::setgray (vector<double> &p) {
_pattern = 0;
if (_actions) {
Color c;
c.setGray((float)p[0]);
_actions->setColor(c);
}
}
void PsSpecialHandler::setrgbcolor (vector<double> &p) {
_pattern= 0;
if (_actions)
_actions->setColor(Color((float)p[0], (float)p[1], (float)p[2]));
}
void PsSpecialHandler::setcmykcolor (vector<double> &p) {
_pattern = 0;
if (_actions) {
Color c;
c.setCMYK((float)p[0], (float)p[1], (float)p[2], (float)p[3]);
_actions->setColor(c);
}
}
void PsSpecialHandler::sethsbcolor (vector<double> &p) {
_pattern = 0;
if (_actions) {
Color c;
c.setHSB((float)p[0], (float)p[1], (float)p[2]);
_actions->setColor(c);
}
}
/** Sets the dash parameters used for stroking.
* @param[in] p dash pattern array m1,...,mn plus trailing dash offset */
void PsSpecialHandler::setdash (vector<double> &p) {
_dashpattern.clear();
for (size_t i=0; i < p.size()-1; i++)
_dashpattern.push_back(scale(p[i]));
_dashoffset = scale(p.back());
}
/** This method is called by the PSInterpreter if an PS operator has been executed. */
void PsSpecialHandler::executed () {
if (_actions)
_actions->progress("ps");
}
////////////////////////////////////////////
void PsSpecialHandler::ClippingStack::push () {
if (!_stack.empty())
_stack.push(Entry(0, -1));
}
void PsSpecialHandler::ClippingStack::push (const Path &path, int saveID) {
if (path.empty())
_stack.push(Entry(0, saveID));
else {
_paths.push_back(path);
_stack.push(Entry(_paths.size(), saveID));
}
}
/** Pops a single or several elements from the clipping stack.
* The method distingushes between the following cases:
* 1) saveID < 0 and grestoreall == false:
* pop top element if it was pushed by gsave (its saveID is < 0 as well)
* 2) saveID < 0 and grestoreall == true
* repeat popping until stack is empty or the top element was pushed
* by save (its saveID is >= 0)
* 3) saveID >= 0:
* pop all elements until the saveID of the top element equals parameter saveID */
void PsSpecialHandler::ClippingStack::pop (int saveID, bool grestoreall) {
if (!_stack.empty()) {
if (saveID < 0) { // grestore?
if (_stack.top().saveID < 0) // pushed by 'gsave'?
_stack.pop();
// pop all further elements pushed by 'gsave' if grestoreall == true
while (grestoreall && !_stack.empty() && _stack.top().saveID < 0)
_stack.pop();
}
else {
// pop elements pushed by 'gsave'
while (!_stack.empty() && _stack.top().saveID != saveID)
_stack.pop();
// pop element pushed by 'save'
if (!_stack.empty())
_stack.pop();
}
}
}
/** Returns a pointer to the path on top of the stack, or 0 if the stack is empty. */
const PsSpecialHandler::Path* PsSpecialHandler::ClippingStack::top () const {
return (!_stack.empty() && _stack.top().pathID)
? &_paths[_stack.top().pathID-1]
: 0;
}
/** Pops all elements from the stack. */
void PsSpecialHandler::ClippingStack::clear() {
_paths.clear();
while (!_stack.empty())
_stack.pop();
}
/** Replaces the top element by a new one.
* @param[in] path new path to be on top of the stack */
void PsSpecialHandler::ClippingStack::replace (const Path &path) {
if (_stack.empty())
push(path, -1);
else {
_paths.push_back(path);
_stack.top().pathID = _paths.size();
}
}
/** Duplicates the top element, i.e. the top element is pushed again. */
void PsSpecialHandler::ClippingStack::dup (int saveID) {
_stack.push(_stack.empty() ? Entry(0, -1) : _stack.top());
_stack.top().saveID = saveID;
}
const char** PsSpecialHandler::prefixes () const {
static const char *pfx[] = {"header=", "psfile=", "PSfile=", "ps:", "ps::", "!", "\"", 0};
return pfx;
}
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