412 lines
10 KiB
C++
412 lines
10 KiB
C++
// -*- C++ -*-
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/* Copyright (C) 1989, 1990, 1991, 1992 Free Software Foundation, Inc.
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Written by James Clark (jjc@jclark.com)
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This file is part of groff.
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groff is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 2, or (at your option) any later
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version.
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groff is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License along
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with groff; see the file COPYING. If not, write to the Free Software
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Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
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#include "pic.h"
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#ifdef TEX_SUPPORT
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#include "common.h"
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class tex_output : public common_output {
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public:
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tex_output();
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~tex_output();
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void start_picture(double, const position &ll, const position &ur);
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void finish_picture();
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void text(const position &, text_piece *, int, double);
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void line(const position &, const position *, int n,
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const line_type &);
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void polygon(const position *, int n,
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const line_type &, double);
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void spline(const position &, const position *, int n,
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const line_type &);
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void arc(const position &, const position &, const position &,
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const line_type &);
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void circle(const position &, double rad, const line_type &, double);
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void ellipse(const position &, const distance &, const line_type &, double);
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void command(const char *, const char *, int);
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int supports_filled_polygons();
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private:
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position upper_left;
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double height;
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double width;
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double scale;
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double pen_size;
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void point(const position &);
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void dot(const position &, const line_type &);
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void solid_arc(const position ¢, double rad, double start_angle,
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double end_angle, const line_type <);
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position transform(const position &);
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protected:
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virtual void set_pen_size(double ps);
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};
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// convert inches to milliinches
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inline int milliinches(double x)
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{
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return int(x*1000.0 + .5);
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}
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inline position tex_output::transform(const position &pos)
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{
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return position((pos.x - upper_left.x)/scale,
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(upper_left.y - pos.y)/scale);
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}
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output *make_tex_output()
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{
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return new tex_output;
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}
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tex_output::tex_output()
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{
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}
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tex_output::~tex_output()
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{
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}
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const int DEFAULT_PEN_SIZE = 8;
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void tex_output::set_pen_size(double ps)
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{
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if (ps < 0.0)
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ps = -1.0;
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if (ps != pen_size) {
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pen_size = ps;
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printf(" \\special{pn %d}%%\n",
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ps < 0.0 ? DEFAULT_PEN_SIZE : int(ps*(1000.0/72.0) + .5));
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}
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}
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void tex_output::start_picture(double sc, const position &ll,
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const position &ur)
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{
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upper_left.x = ll.x;
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upper_left.y = ur.y;
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scale = compute_scale(sc, ll, ur);
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height = (ur.y - ll.y)/scale;
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width = (ur.x - ll.x)/scale;
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/* the point of \vskip 0pt is to ensure that the vtop gets
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a height of 0 rather than the height of the hbox; this
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might be non-zero if text from text attributes lies outside pic's
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idea of the bounding box of the picture. */
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fputs("\\expandafter\\ifx\\csname graph\\endcsname\\relax \\csname newbox\\endcsname\\graph\\fi\n"
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"\\expandafter\\ifx\\csname graphtemp\\endcsname\\relax \\csname newdimen\\endcsname\\graphtemp\\fi\n"
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"\\setbox\\graph=\\vtop{\\vskip 0pt\\hbox{%\n",
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stdout);
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pen_size = -2.0;
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}
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void tex_output::finish_picture()
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{
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printf(" \\hbox{\\vrule depth%.3fin width0pt height 0pt}%%\n"
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" \\kern %.3fin\n"
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" }%%\n"
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"}%%\n",
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height, width);
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}
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void tex_output::text(const position ¢er, text_piece *v, int n, double)
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{
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position c = transform(center);
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for (int i = 0; i < n; i++)
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if (v[i].text != 0 && *v[i].text != '\0') {
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int j = 2*i - n + 1;
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if (v[i].adj.v == ABOVE_ADJUST)
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j--;
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else if (v[i].adj.v == BELOW_ADJUST)
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j++;
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if (j == 0) {
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printf(" \\graphtemp=.5ex\\advance\\graphtemp by %.3fin\n", c.y);
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}
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else {
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printf(" \\graphtemp=\\baselineskip"
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"\\multiply\\graphtemp by %d"
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"\\divide\\graphtemp by 2\n"
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" \\advance\\graphtemp by .5ex"
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"\\advance\\graphtemp by %.3fin\n",
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j, c.y);
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}
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printf(" \\rlap{\\kern %.3fin\\lower\\graphtemp", c.x);
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fputs("\\hbox to 0pt{", stdout);
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if (v[i].adj.h != LEFT_ADJUST)
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fputs("\\hss ", stdout);
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fputs(v[i].text, stdout);
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if (v[i].adj.h != RIGHT_ADJUST)
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fputs("\\hss", stdout);
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fputs("}}%\n", stdout);
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}
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}
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void tex_output::point(const position &pos)
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{
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position p = transform(pos);
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printf(" \\special{pa %d %d}%%\n", milliinches(p.x), milliinches(p.y));
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}
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void tex_output::line(const position &start, const position *v, int n,
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const line_type <)
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{
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set_pen_size(lt.thickness);
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point(start);
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for (int i = 0; i < n; i++)
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point(v[i]);
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fputs(" \\special{", stdout);
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switch(lt.type) {
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case line_type::invisible:
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fputs("ip", stdout);
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break;
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case line_type::solid:
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fputs("fp", stdout);
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break;
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case line_type::dotted:
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printf("dt %.3f", lt.dash_width/scale);
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break;
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case line_type::dashed:
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printf("da %.3f", lt.dash_width/scale);
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break;
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}
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fputs("}%\n", stdout);
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}
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void tex_output::polygon(const position *v, int n,
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const line_type <, double fill)
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{
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if (fill >= 0.0) {
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if (fill > 1.0)
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fill = 1.0;
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printf(" \\special{sh %.3f}%%\n", fill);
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}
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line(v[n-1], v, n, lt);
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}
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void tex_output::spline(const position &start, const position *v, int n,
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const line_type <)
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{
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if (lt.type == line_type::invisible)
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return;
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set_pen_size(lt.thickness);
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point(start);
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for (int i = 0; i < n; i++)
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point(v[i]);
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fputs(" \\special{sp", stdout);
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switch(lt.type) {
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case line_type::solid:
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break;
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case line_type::dotted:
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printf(" %.3f", -lt.dash_width/scale);
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break;
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case line_type::dashed:
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printf(" %.3f", lt.dash_width/scale);
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break;
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case line_type::invisible:
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assert(0);
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}
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fputs("}%\n", stdout);
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}
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void tex_output::solid_arc(const position ¢, double rad,
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double start_angle, double end_angle,
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const line_type <)
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{
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set_pen_size(lt.thickness);
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position c = transform(cent);
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printf(" \\special{ar %d %d %d %d %f %f}%%\n",
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milliinches(c.x),
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milliinches(c.y),
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milliinches(rad/scale),
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milliinches(rad/scale),
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-end_angle,
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(-end_angle > -start_angle) ? M_PI * 2 - start_angle : -start_angle);
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}
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void tex_output::arc(const position &start, const position ¢,
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const position &end, const line_type <)
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{
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switch (lt.type) {
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case line_type::invisible:
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break;
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case line_type::dashed:
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dashed_arc(start, cent, end, lt);
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break;
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case line_type::dotted:
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dotted_arc(start, cent, end, lt);
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break;
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case line_type::solid:
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{
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position c;
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if (!compute_arc_center(start, cent, end, &c)) {
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line(start, &end, 1, lt);
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break;
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}
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solid_arc(c,
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hypot(cent - start),
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atan2(start.y - c.y, start.x - c.x),
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atan2(end.y - c.y, end.x - c.x),
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lt);
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break;
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}
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}
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}
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void tex_output::circle(const position ¢, double rad,
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const line_type <, double fill)
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{
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if (fill >= 0.0 && lt.type != line_type::solid) {
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if (fill > 1.0)
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fill = 1.0;
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line_type ilt;
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ilt.type = line_type::invisible;
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ellipse(cent, position(rad*2.0, rad*2.0), ilt, fill);
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}
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switch (lt.type) {
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case line_type::dashed:
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dashed_circle(cent, rad, lt);
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break;
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case line_type::invisible:
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break;
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case line_type::solid:
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ellipse(cent, position(rad*2.0,rad*2.0), lt, fill);
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break;
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case line_type::dotted:
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dotted_circle(cent, rad, lt);
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break;
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default:
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assert(0);
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}
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}
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void tex_output::ellipse(const position ¢, const distance &dim,
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const line_type <, double fill)
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{
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if (lt.type == line_type::invisible) {
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if (fill < 0.0)
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return;
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}
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else
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set_pen_size(lt.thickness);
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if (fill >= 0.0) {
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if (fill > 1.0)
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fill = 1.0;
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printf(" \\special{sh %.3f}%%\n", fill);
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}
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position c = transform(cent);
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printf(" \\special{%s %d %d %d %d 0 6.28319}%%\n",
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(lt.type == line_type::invisible ? "ia" : "ar"),
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milliinches(c.x),
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milliinches(c.y),
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milliinches(dim.x/(2.0*scale)),
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milliinches(dim.y/(2.0*scale)));
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}
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void tex_output::command(const char *s, const char *, int)
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{
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fputs(s, stdout);
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putchar('%'); // avoid unwanted spaces
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putchar('\n');
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}
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int tex_output::supports_filled_polygons()
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{
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return 1;
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}
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void tex_output::dot(const position &pos, const line_type <)
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{
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if (zero_length_line_flag) {
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line_type slt = lt;
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slt.type = line_type::solid;
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line(pos, &pos, 1, slt);
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}
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else {
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int dot_rad = int(lt.thickness*(1000.0/(72.0*2)) + .5);
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if (dot_rad == 0)
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dot_rad = 1;
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position p = transform(pos);
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printf(" \\special{sh 1}%%\n"
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" \\special{ia %d %d %d %d 0 6.28319}%%\n",
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milliinches(p.x), milliinches(p.y), dot_rad, dot_rad);
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}
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}
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class tpic_output : public tex_output {
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public:
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tpic_output();
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void command(const char *, const char *, int);
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private:
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void set_pen_size(double ps);
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int default_pen_size;
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int prev_default_pen_size;
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};
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tpic_output::tpic_output()
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: default_pen_size(DEFAULT_PEN_SIZE), prev_default_pen_size(DEFAULT_PEN_SIZE)
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{
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}
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void tpic_output::command(const char *s, const char *filename, int lineno)
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{
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assert(s[0] == '.');
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if (s[1] == 'p' && s[2] == 's' && (s[3] == '\0' || !csalpha(s[3]))) {
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const char *p = s + 3;
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while (csspace(*p))
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p++;
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if (*p == '\0') {
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int temp = default_pen_size;
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default_pen_size = prev_default_pen_size;
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prev_default_pen_size = temp;
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}
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else {
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char *ptr;
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int temp = (int)strtol(p, &ptr, 10);
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if (temp == 0 && ptr == p)
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error_with_file_and_line(filename, lineno,
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"argument to `.ps' not an integer");
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else if (temp < 0)
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error_with_file_and_line(filename, lineno,
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"negative pen size");
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else {
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prev_default_pen_size = default_pen_size;
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default_pen_size = temp;
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}
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}
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}
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else
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printf("\\%s%%\n", s + 1);
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}
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void tpic_output::set_pen_size(double ps)
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{
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if (ps < 0.0)
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printf(" \\special{pn %d}%%\n", default_pen_size);
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else
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tex_output::set_pen_size(ps);
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}
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output *make_tpic_output()
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{
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return new tpic_output;
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}
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#endif
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