diff options
Diffstat (limited to 'libqpdf/QPDFMatrix.cc')
-rw-r--r-- | libqpdf/QPDFMatrix.cc | 46 |
1 files changed, 40 insertions, 6 deletions
diff --git a/libqpdf/QPDFMatrix.cc b/libqpdf/QPDFMatrix.cc index 3d410435..c78154aa 100644 --- a/libqpdf/QPDFMatrix.cc +++ b/libqpdf/QPDFMatrix.cc @@ -1,5 +1,6 @@ #include <qpdf/QPDFMatrix.hh> #include <qpdf/QUtil.hh> +#include <algorithm> QPDFMatrix::QPDFMatrix() : a(1.0), @@ -32,16 +33,30 @@ QPDFMatrix::QPDFMatrix(QPDFObjectHandle::Matrix const& m) : { } +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(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)); + 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 @@ -99,3 +114,22 @@ 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; } + +QPDFObjectHandle::Rectangle +QPDFMatrix::transformRectangle(QPDFObjectHandle::Rectangle r) +{ + // Transform a rectangle by creating a new rectangle the tightly + // bounds the polygon resulting from transforming the four + // corners. + 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())); +} |