mirror of
https://github.com/qpdf/qpdf.git
synced 2024-11-05 04:47:53 +00:00
102 lines
2.0 KiB
C++
102 lines
2.0 KiB
C++
#include <qpdf/QPDFMatrix.hh>
|
|
#include <qpdf/QUtil.hh>
|
|
|
|
QPDFMatrix::QPDFMatrix() :
|
|
a(1.0),
|
|
b(0.0),
|
|
c(0.0),
|
|
d(1.0),
|
|
e(0.0),
|
|
f(0.0)
|
|
{
|
|
}
|
|
|
|
QPDFMatrix::QPDFMatrix(double a, double b, double c,
|
|
double d, double e, double f) :
|
|
a(a),
|
|
b(b),
|
|
c(c),
|
|
d(d),
|
|
e(e),
|
|
f(f)
|
|
{
|
|
}
|
|
|
|
QPDFMatrix::QPDFMatrix(QPDFObjectHandle::Matrix const& m) :
|
|
a(m.a),
|
|
b(m.b),
|
|
c(m.c),
|
|
d(m.d),
|
|
e(m.e),
|
|
f(m.f)
|
|
{
|
|
}
|
|
|
|
|
|
std::string
|
|
QPDFMatrix::unparse() const
|
|
{
|
|
return (QUtil::double_to_string(a, 5) + " " +
|
|
QUtil::double_to_string(b, 5) + " " +
|
|
QUtil::double_to_string(c, 5) + " " +
|
|
QUtil::double_to_string(d, 5) + " " +
|
|
QUtil::double_to_string(e, 5) + " " +
|
|
QUtil::double_to_string(f, 5));
|
|
}
|
|
|
|
void
|
|
QPDFMatrix::concat(QPDFMatrix const& other)
|
|
{
|
|
double ap = (this->a * other.a) + (this->c * other.b);
|
|
double bp = (this->b * other.a) + (this->d * other.b);
|
|
double cp = (this->a * other.c) + (this->c * other.d);
|
|
double dp = (this->b * other.c) + (this->d * other.d);
|
|
double ep = (this->a * other.e) + (this->c * other.f) + this->e;
|
|
double fp = (this->b * other.e) + (this->d * other.f) + this->f;
|
|
this-> a = ap;
|
|
this-> b = bp;
|
|
this-> c = cp;
|
|
this-> d = dp;
|
|
this-> e = ep;
|
|
this-> f = fp;
|
|
}
|
|
|
|
void
|
|
QPDFMatrix::scale(double sx, double sy)
|
|
{
|
|
concat(QPDFMatrix(sx, 0, 0, sy, 0, 0));
|
|
}
|
|
|
|
void
|
|
QPDFMatrix::translate(double tx, double ty)
|
|
{
|
|
concat(QPDFMatrix(1, 0, 0, 1, tx, ty));
|
|
}
|
|
|
|
void
|
|
QPDFMatrix::rotatex90(int angle)
|
|
{
|
|
switch (angle)
|
|
{
|
|
case 90:
|
|
concat(QPDFMatrix(0, 1, -1, 0, 0, 0));
|
|
break;
|
|
case 180:
|
|
concat(QPDFMatrix(-1, 0, 0, -1, 0, 0));
|
|
break;
|
|
case 270:
|
|
concat(QPDFMatrix(0, -1, 1, 0, 0, 0));
|
|
break;
|
|
default:
|
|
// ignore
|
|
break;
|
|
}
|
|
}
|
|
|
|
void
|
|
QPDFMatrix::transform(double x, double y, double& xp, double& yp)
|
|
{
|
|
xp = (this->a * x) + (this->c * y) + this->e;
|
|
yp = (this->b * x) + (this->d * y) + this->f;
|
|
}
|