summaryrefslogtreecommitdiffstats
path: root/src/3rdparty/libdepixelize/priv/integral.h
diff options
context:
space:
mode:
authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:24:48 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:24:48 +0000
commitcca66b9ec4e494c1d919bff0f71a820d8afab1fa (patch)
tree146f39ded1c938019e1ed42d30923c2ac9e86789 /src/3rdparty/libdepixelize/priv/integral.h
parentInitial commit. (diff)
downloadinkscape-upstream.tar.xz
inkscape-upstream.zip
Adding upstream version 1.2.2.upstream/1.2.2upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r--src/3rdparty/libdepixelize/priv/integral.h61
1 files changed, 61 insertions, 0 deletions
diff --git a/src/3rdparty/libdepixelize/priv/integral.h b/src/3rdparty/libdepixelize/priv/integral.h
new file mode 100644
index 0000000..fc1a49f
--- /dev/null
+++ b/src/3rdparty/libdepixelize/priv/integral.h
@@ -0,0 +1,61 @@
+/* This file is part of the libdepixelize project
+ Copyright (C) 2013 Vinícius dos Santos Oliveira <vini.ipsmaker@gmail.com>
+
+ GNU Lesser General Public License Usage
+ This library is free software; you can redistribute it and/or modify it
+ under the terms of the GNU Lesser General Public License as published by the
+ Free Software Foundation; either version 2.1 of the License, or (at your
+ option) any later version.
+ You should have received a copy of the GNU Lesser General Public License
+ along with this library. If not, see <http://www.gnu.org/licenses/>.
+
+ GNU General Public License Usage
+ Alternatively, this library may be used 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.
+ You should have received a copy of the GNU General Public License along with
+ this library. If not, see <http://www.gnu.org/licenses/>.
+
+ This library 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
+ Lesser General Public License for more details.
+*/
+
+#ifndef LIBDEPIXELIZE_TRACER_INTEGRAL_H
+#define LIBDEPIXELIZE_TRACER_INTEGRAL_H
+
+#include <2geom/coord.h>
+
+namespace Tracer {
+
+/**
+ * Compute the integral numerically using Gaussian Quadrature rule with
+ * \p samples number of samples.
+ */
+template<class T, class F>
+Geom::Coord integral(F f, T begin, T end, unsigned samples)
+{
+ T ret = 0;
+ const T width = (end - begin) / samples;
+
+ for ( unsigned i = 0 ; i != samples ; ++i )
+ ret += width * f(begin + width * (i + .5));
+
+ return ret;
+}
+
+} // namespace Tracer
+
+#endif // LIBDEPIXELIZE_TRACER_INTEGRAL_H
+
+/*
+ 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 :