Commit 7eef3eae authored by Nicolas Robidoux's avatar Nicolas Robidoux Committed by Øyvind "pippin" Kolås

comments

parent 613f6805
......@@ -39,6 +39,16 @@
* management system.
*/
/*
* Reference:
*
* Nohalo subdivision (with bilinear instead of LBB "finish") is
* documented in Robidoux, N., Gong, M., Cupitt, J., Turcotte, A., and
* Martinez, K. CPU, SMP and GPU implementations of Nohalo level 1, a
* fast co-convex antialiasing image resampler. In Proceedings of
* C3S2E. 2009, 185-195.
*/
/*
* Credits and thanks:
*
......@@ -2333,12 +2343,13 @@ gegl_sampler_lohalo_get ( GeglSampler* restrict self,
* Update using mipmap level 1 values.
*
* Possible future improvement: When the ellipse is
* slanted, one could avoid many operations using
* Anthony Thyssen's formulas for the bounding
* parallelogram with horizontal top and bottom. When
* both the magnification factors are the same, or
* when there is no rotation, using these formulas
* makes no difference.
* slanted, one could avoid many pixel value loads and
* operations with Anthony Thyssen's formulas for the
* ellipse bounding parallelogram with horizontal top
* and bottom. When both the magnification factors are
* the same, or when there is no rotation, using these
* formulas makes no difference. Reference:
* ImageMagick resample.c.
*/
{
gint i;
......
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