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author | Chris Loer <chris.loer@gmail.com> | 2017-07-07 13:31:53 -0700 |
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committer | Chris Loer <chris.loer@gmail.com> | 2017-11-27 10:29:29 -0800 |
commit | 9910e8ce8717a5a456a73c2be613cffbe315f076 (patch) | |
tree | 3aac299d77fe5811734a68c36f0a911227e4b7dd /src/mbgl/util/tiny_sdf.hpp | |
parent | d8bcc943c50b1030f8b090d28b023ff7c40afd9c (diff) | |
download | qtlocation-mapboxgl-9910e8ce8717a5a456a73c2be613cffbe315f076.tar.gz |
[core] C++ port of TinySDF
Diffstat (limited to 'src/mbgl/util/tiny_sdf.hpp')
-rw-r--r-- | src/mbgl/util/tiny_sdf.hpp | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/src/mbgl/util/tiny_sdf.hpp b/src/mbgl/util/tiny_sdf.hpp new file mode 100644 index 0000000000..33c9280cbd --- /dev/null +++ b/src/mbgl/util/tiny_sdf.hpp @@ -0,0 +1,20 @@ +#pragma once + +#include <mbgl/util/image.hpp> + +namespace mbgl { +namespace util { + +/* + C++ port of https://github.com/mapbox/tiny-sdf, which is in turn based on the + Felzenszwalb/Huttenlocher distance transform paper (https://cs.brown.edu/~pff/papers/dt-final.pdf). + Note there exists an alternative C++ implementation from the paper’s authors at + https://cs.brown.edu/~pff/dt/, which this implementation is not based on. + + Takes an alpha channel raster input and transforms it into an alpha channel + Signed Distance Field (SDF) output of the same dimensions. +*/ +AlphaImage transformRasterToSDF(const AlphaImage& rasterInput, double radius, double cutoff); + +} // namespace util +} // namespace mbgl |