mirror of
https://github.com/qpdf/qpdf.git
synced 2024-11-16 17:45:09 +00:00
156 lines
3.5 KiB
C++
156 lines
3.5 KiB
C++
#include <qpdf/QPDFMatrix.hh>
|
|
#include <qpdf/QUtil.hh>
|
|
#include <algorithm>
|
|
|
|
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)
|
|
{
|
|
}
|
|
|
|
static double fix_rounding(double d)
|
|
{
|
|
if ((d > -0.00001) && (d < 0.00001))
|
|
{
|
|
d = 0.0;
|
|
}
|
|
return d;
|
|
}
|
|
|
|
std::string
|
|
QPDFMatrix::unparse() const
|
|
{
|
|
return (QUtil::double_to_string(fix_rounding(a), 5) + " " +
|
|
QUtil::double_to_string(fix_rounding(b), 5) + " " +
|
|
QUtil::double_to_string(fix_rounding(c), 5) + " " +
|
|
QUtil::double_to_string(fix_rounding(d), 5) + " " +
|
|
QUtil::double_to_string(fix_rounding(e), 5) + " " +
|
|
QUtil::double_to_string(fix_rounding(f), 5));
|
|
}
|
|
|
|
QPDFObjectHandle::Matrix
|
|
QPDFMatrix::getAsMatrix() const
|
|
{
|
|
return QPDFObjectHandle::Matrix(a, b, c, d, e, f);
|
|
}
|
|
|
|
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)
|
|
{
|
|
const_cast<QPDFMatrix const*>(this)->transform(x, y, xp, yp);
|
|
}
|
|
|
|
void
|
|
QPDFMatrix::transform(double x, double y, double& xp, double& yp) const
|
|
{
|
|
xp = (this->a * x) + (this->c * y) + this->e;
|
|
yp = (this->b * x) + (this->d * y) + this->f;
|
|
}
|
|
|
|
QPDFObjectHandle::Rectangle
|
|
QPDFMatrix::transformRectangle(QPDFObjectHandle::Rectangle r)
|
|
{
|
|
return const_cast<QPDFMatrix const*>(this)->transformRectangle(r);
|
|
}
|
|
|
|
QPDFObjectHandle::Rectangle
|
|
QPDFMatrix::transformRectangle(QPDFObjectHandle::Rectangle r) const
|
|
{
|
|
std::vector<double> tx(4);
|
|
std::vector<double> ty(4);
|
|
transform(r.llx, r.lly, tx.at(0), ty.at(0));
|
|
transform(r.llx, r.ury, tx.at(1), ty.at(1));
|
|
transform(r.urx, r.lly, tx.at(2), ty.at(2));
|
|
transform(r.urx, r.ury, tx.at(3), ty.at(3));
|
|
return QPDFObjectHandle::Rectangle(
|
|
*std::min_element(tx.begin(), tx.end()),
|
|
*std::min_element(ty.begin(), ty.end()),
|
|
*std::max_element(tx.begin(), tx.end()),
|
|
*std::max_element(ty.begin(), ty.end()));
|
|
}
|
|
|
|
bool
|
|
QPDFMatrix::operator==(QPDFMatrix const& rhs) const
|
|
{
|
|
return ((this->a == rhs.a) &&
|
|
(this->b == rhs.b) &&
|
|
(this->c == rhs.c) &&
|
|
(this->d == rhs.d) &&
|
|
(this->e == rhs.e) &&
|
|
(this->f == rhs.f));
|
|
}
|