From 179fa413b047bede6e32109e2ce82437c5fb8d34 Mon Sep 17 00:00:00 2001 From: MenTaLguY Date: Mon, 16 Jan 2006 02:36:01 +0000 Subject: moving trunk for module inkscape (bzr r1) --- src/fontsize-expansion.cpp | 30 ++++++++++++++++++++++++++++++ 1 file changed, 30 insertions(+) create mode 100644 src/fontsize-expansion.cpp (limited to 'src/fontsize-expansion.cpp') diff --git a/src/fontsize-expansion.cpp b/src/fontsize-expansion.cpp new file mode 100644 index 000000000..50169c3c2 --- /dev/null +++ b/src/fontsize-expansion.cpp @@ -0,0 +1,30 @@ +#include "libnr/nr-matrix-ops.h" + +/** + * Returns the distance from the transformed baseline to the + * transformation of a point at (0, 1); or 0 if \a m has no inverse. + */ +double +fontsize_expansion(NR::Matrix const &m) +{ + double const denom(hypot(m[0], m[1])); + if (!(denom > 1e-100)) { + return 0.; + } + double const numer(m.descrim2()); + if (!(numer > 1e-100)) { + return 0.; + } + return numer / denom; +} + +/* + Local Variables: + mode:c++ + c-file-style:"stroustrup" + c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +)) + indent-tabs-mode:nil + fill-column:99 + End: +*/ +// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 : -- cgit v1.2.3