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author | maxim-yurchuk <maxim-yurchuk@yandex-team.com> | 2024-10-09 12:29:46 +0300 |
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committer | maxim-yurchuk <maxim-yurchuk@yandex-team.com> | 2024-10-09 13:14:22 +0300 |
commit | 9731d8a4bb7ee2cc8554eaf133bb85498a4c7d80 (patch) | |
tree | a8fb3181d5947c0d78cf402aa56e686130179049 /contrib/python/matplotlib/py3/extern/agg24-svn/include/agg_ellipse_bresenham.h | |
parent | a44b779cd359f06c3ebbef4ec98c6b38609d9d85 (diff) | |
download | ydb-9731d8a4bb7ee2cc8554eaf133bb85498a4c7d80.tar.gz |
publishFullContrib: true for ydb
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commit_hash:c82a80ac4594723cebf2c7387dec9c60217f603e
Diffstat (limited to 'contrib/python/matplotlib/py3/extern/agg24-svn/include/agg_ellipse_bresenham.h')
-rw-r--r-- | contrib/python/matplotlib/py3/extern/agg24-svn/include/agg_ellipse_bresenham.h | 113 |
1 files changed, 113 insertions, 0 deletions
diff --git a/contrib/python/matplotlib/py3/extern/agg24-svn/include/agg_ellipse_bresenham.h b/contrib/python/matplotlib/py3/extern/agg24-svn/include/agg_ellipse_bresenham.h new file mode 100644 index 0000000000..ee3b9c4638 --- /dev/null +++ b/contrib/python/matplotlib/py3/extern/agg24-svn/include/agg_ellipse_bresenham.h @@ -0,0 +1,113 @@ +//---------------------------------------------------------------------------- +// Anti-Grain Geometry - Version 2.4 +// Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com) +// +// Permission to copy, use, modify, sell and distribute this software +// is granted provided this copyright notice appears in all copies. +// This software is provided "as is" without express or implied +// warranty, and with no claim as to its suitability for any purpose. +// +//---------------------------------------------------------------------------- +// Contact: mcseem@antigrain.com +// mcseemagg@yahoo.com +// http://www.antigrain.com +//---------------------------------------------------------------------------- +// +// Simple Bresenham interpolator for ellipsees +// +//---------------------------------------------------------------------------- + +#ifndef AGG_ELLIPSE_BRESENHAM_INCLUDED +#define AGG_ELLIPSE_BRESENHAM_INCLUDED + + +#include "agg_basics.h" + + +namespace agg +{ + + //------------------------------------------ellipse_bresenham_interpolator + class ellipse_bresenham_interpolator + { + public: + ellipse_bresenham_interpolator(int rx, int ry) : + m_rx2(rx * rx), + m_ry2(ry * ry), + m_two_rx2(m_rx2 << 1), + m_two_ry2(m_ry2 << 1), + m_dx(0), + m_dy(0), + m_inc_x(0), + m_inc_y(-ry * m_two_rx2), + m_cur_f(0) + {} + + int dx() const { return m_dx; } + int dy() const { return m_dy; } + + void operator++ () + { + int mx, my, mxy, min_m; + int fx, fy, fxy; + + mx = fx = m_cur_f + m_inc_x + m_ry2; + if(mx < 0) mx = -mx; + + my = fy = m_cur_f + m_inc_y + m_rx2; + if(my < 0) my = -my; + + mxy = fxy = m_cur_f + m_inc_x + m_ry2 + m_inc_y + m_rx2; + if(mxy < 0) mxy = -mxy; + + min_m = mx; + bool flag = true; + + if(min_m > my) + { + min_m = my; + flag = false; + } + + m_dx = m_dy = 0; + + if(min_m > mxy) + { + m_inc_x += m_two_ry2; + m_inc_y += m_two_rx2; + m_cur_f = fxy; + m_dx = 1; + m_dy = 1; + return; + } + + if(flag) + { + m_inc_x += m_two_ry2; + m_cur_f = fx; + m_dx = 1; + return; + } + + m_inc_y += m_two_rx2; + m_cur_f = fy; + m_dy = 1; + } + + private: + int m_rx2; + int m_ry2; + int m_two_rx2; + int m_two_ry2; + int m_dx; + int m_dy; + int m_inc_x; + int m_inc_y; + int m_cur_f; + + }; + +} + +#endif + |