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// -*- related-file-name: "../include/efont/t1bounds.hh" -*-
/* t1bounds.{cc,hh} -- charstring bounding box finder
*
* Copyright (c) 1998-2011 Eddie Kohler
*
* 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 2 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.
*/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <efont/t1bounds.hh>
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
namespace Efont {
CharstringBounds::CharstringBounds()
: _lb(UNKDOUBLE, UNKDOUBLE), _rt(UNKDOUBLE, UNKDOUBLE),
_last_xf_program(0)
{
}
CharstringBounds::CharstringBounds(const Transform &nonfont_xf)
: _lb(UNKDOUBLE, UNKDOUBLE), _rt(UNKDOUBLE, UNKDOUBLE),
_nonfont_xf(nonfont_xf), _last_xf_program(0)
{
}
CharstringBounds::CharstringBounds(const Transform &nonfont_xf, const Vector<double> &weight)
: CharstringInterp(weight),
_lb(UNKDOUBLE, UNKDOUBLE), _rt(UNKDOUBLE, UNKDOUBLE),
_nonfont_xf(nonfont_xf), _last_xf_program(0)
{
}
void
CharstringBounds::clear()
{
_lb = _rt = Point(UNKDOUBLE, UNKDOUBLE);
}
void
CharstringBounds::xf_mark(const Bezier &b)
{
Bezier b1, b2;
b.halve(b1, b2);
xf_mark(b1.point(3));
if (!xf_controls_inside(b1))
xf_mark(b1);
if (!xf_controls_inside(b2))
xf_mark(b2);
}
void
CharstringBounds::act_width(int, const Point &w)
{
_width = w;
}
void
CharstringBounds::act_line(int, const Point &p0, const Point &p1)
{
mark(p0);
mark(p1);
}
void
CharstringBounds::act_curve(int, const Point &p0, const Point &p1, const Point &p2, const Point &p3)
{
Point q0 = p0 * _xf;
Point q1 = p1 * _xf;
Point q2 = p2 * _xf;
Point q3 = p3 * _xf;
xf_mark(q0);
xf_mark(q3);
if (!xf_inside(q1) || !xf_inside(q2)) {
Bezier b(q0, q1, q2, q3);
xf_mark(b);
}
}
void
CharstringBounds::set_xf(const CharstringProgram *program)
{
if (_last_xf_program != program) {
_last_xf_program = program;
double matrix[6];
program->font_matrix(matrix);
Transform font_xf = Transform(matrix).scaled(1000);
font_xf.check_null(0.001);
_xf = _nonfont_xf * font_xf;
}
}
bool
CharstringBounds::char_bounds(const CharstringContext &g, bool shift)
{
set_xf(g.program);
CharstringInterp::interpret(g);
if (shift) {
_xf.translate(_width);
_nonfont_xf.translate(_width);
}
return error() >= 0;
}
void
CharstringBounds::translate(double dx, double dy)
{
_xf.translate(dx, dy);
_nonfont_xf.translate(dx, dy);
}
bool
CharstringBounds::output(int bb[4], int &width, bool use_cur_width) const
{
if (!KNOWN(_lb.x))
bb[0] = bb[1] = bb[2] = bb[3] = 0;
else {
bb[0] = (int) floor(_lb.x);
bb[1] = (int) floor(_lb.y);
bb[2] = (int) ceil(_rt.x);
bb[3] = (int) ceil(_rt.y);
}
Point p;
if (use_cur_width)
p = _width * _xf;
else
p = Point(0, 0) * _xf;
width = (int) ceil(p.x);
return error() >= 0;
}
bool
CharstringBounds::bounds(const Transform &transform, const CharstringContext &g, int bb[4], int &width)
{
CharstringBounds b(transform);
b.char_bounds(g, false);
return b.output(bb, width, true);
}
bool
CharstringBounds::bounds(const CharstringContext &g, int bb[4], int &width)
{
CharstringBounds b;
b.char_bounds(g, false);
return b.output(bb, width, true);
}
}
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