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Diffstat (limited to 'agg/inc/agg_conv_marker.h')
-rwxr-xr-x | agg/inc/agg_conv_marker.h | 154 |
1 files changed, 154 insertions, 0 deletions
diff --git a/agg/inc/agg_conv_marker.h b/agg/inc/agg_conv_marker.h new file mode 100755 index 000000000000..1ae7fc92307b --- /dev/null +++ b/agg/inc/agg_conv_marker.h @@ -0,0 +1,154 @@ +//---------------------------------------------------------------------------- +// Anti-Grain Geometry - Version 2.3 +// 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 +//---------------------------------------------------------------------------- +// +// conv_marker +// +//---------------------------------------------------------------------------- +#ifndef AGG_CONV_MARKER_INCLUDED +#define AGG_CONV_MARKER_INCLUDED + +#include "agg_basics.h" +#include "agg_trans_affine.h" +#include "agg_vertex_iterator.h" + +namespace agg +{ + //-------------------------------------------------------------conv_marker + template<class MarkerLocator, class MarkerShapes> + class conv_marker + { + public: + conv_marker(MarkerLocator& ml, MarkerShapes& ms); + + trans_affine& transform() { return m_transform; } + const trans_affine& transform() const { return m_transform; } + + void rewind(unsigned id); + unsigned vertex(double* x, double* y); + + typedef conv_marker<MarkerLocator, MarkerShapes> source_type; + typedef vertex_iterator<source_type> iterator; + iterator begin(unsigned id) { return iterator(*this, id); } + iterator end() { return iterator(path_cmd_stop); } + + private: + conv_marker(const conv_marker<MarkerLocator, MarkerShapes>&); + const conv_marker<MarkerLocator, MarkerShapes>& + operator = (const conv_marker<MarkerLocator, MarkerShapes>&); + + enum status_e + { + initial, + markers, + polygon, + stop + }; + + MarkerLocator* m_marker_locator; + MarkerShapes* m_marker_shapes; + trans_affine m_transform; + trans_affine m_mtx; + status_e m_status; + unsigned m_marker; + unsigned m_num_markers; + }; + + + //------------------------------------------------------------------------ + template<class MarkerLocator, class MarkerShapes> + conv_marker<MarkerLocator, MarkerShapes>::conv_marker(MarkerLocator& ml, MarkerShapes& ms) : + m_marker_locator(&ml), + m_marker_shapes(&ms), + m_status(initial), + m_marker(0), + m_num_markers(1) + { + } + + + //------------------------------------------------------------------------ + template<class MarkerLocator, class MarkerShapes> + void conv_marker<MarkerLocator, MarkerShapes>::rewind(unsigned) + { + m_status = initial; + m_marker = 0; + m_num_markers = 1; + } + + + //------------------------------------------------------------------------ + template<class MarkerLocator, class MarkerShapes> + unsigned conv_marker<MarkerLocator, MarkerShapes>::vertex(double* x, double* y) + { + unsigned cmd = path_cmd_move_to; + double x1, y1, x2, y2; + + while(!is_stop(cmd)) + { + switch(m_status) + { + case initial: + if(m_num_markers == 0) + { + cmd = path_cmd_stop; + break; + } + m_marker_locator->rewind(m_marker); + ++m_marker; + m_num_markers = 0; + m_status = markers; + + case markers: + if(is_stop(m_marker_locator->vertex(&x1, &y1))) + { + m_status = initial; + break; + } + if(is_stop(m_marker_locator->vertex(&x2, &y2))) + { + m_status = initial; + break; + } + ++m_num_markers; + m_mtx = m_transform; + m_mtx *= trans_affine_rotation(atan2(y2 - y1, x2 - x1)); + m_mtx *= trans_affine_translation(x1, y1); + m_marker_shapes->rewind(m_marker - 1); + m_status = polygon; + + case polygon: + cmd = m_marker_shapes->vertex(x, y); + if(is_stop(cmd)) + { + cmd = path_cmd_move_to; + m_status = markers; + break; + } + m_mtx.transform(x, y); + return cmd; + + case stop: + cmd = path_cmd_stop; + break; + } + } + return cmd; + } + +} + + +#endif + |