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Diffstat (limited to 'agg/inc/agg_bounding_rect.h')
-rwxr-xr-x | agg/inc/agg_bounding_rect.h | 116 |
1 files changed, 116 insertions, 0 deletions
diff --git a/agg/inc/agg_bounding_rect.h b/agg/inc/agg_bounding_rect.h new file mode 100755 index 000000000000..9a3c301069d7 --- /dev/null +++ b/agg/inc/agg_bounding_rect.h @@ -0,0 +1,116 @@ +//---------------------------------------------------------------------------- +// 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 +//---------------------------------------------------------------------------- +// +// bounding_rect function template +// +//---------------------------------------------------------------------------- +#ifndef AGG_BOUNDING_RECT_INCLUDED +#define AGG_BOUNDING_RECT_INCLUDED + +#include "agg_basics.h" + +namespace agg +{ + + //-----------------------------------------------------------bounding_rect + template<class VertexSource, class GetId, class CoordT> + bool bounding_rect(VertexSource& vs, GetId& gi, + unsigned start, unsigned num, + CoordT* x1, CoordT* y1, CoordT* x2, CoordT* y2) + { + unsigned i; + double x; + double y; + bool first = true; + + *x1 = CoordT(1); + *y1 = CoordT(1); + *x2 = CoordT(0); + *y2 = CoordT(0); + + for(i = 0; i < num; i++) + { + vs.rewind(gi[start + i]); + unsigned cmd; + while(!is_stop(cmd = vs.vertex(&x, &y))) + { + if(is_vertex(cmd)) + { + if(first) + { + *x1 = CoordT(x); + *y1 = CoordT(y); + *x2 = CoordT(x); + *y2 = CoordT(y); + first = false; + } + else + { + if(CoordT(x) < *x1) *x1 = CoordT(x); + if(CoordT(y) < *y1) *y1 = CoordT(y); + if(CoordT(x) > *x2) *x2 = CoordT(x); + if(CoordT(y) > *y2) *y2 = CoordT(y); + } + } + } + } + return *x1 <= *x2 && *y1 <= *y2; + } + + + //-----------------------------------------------------bounding_rect_single + template<class VertexSource, class CoordT> + bool bounding_rect_single(VertexSource& vs, unsigned path_id, + CoordT* x1, CoordT* y1, CoordT* x2, CoordT* y2) + { + double x; + double y; + bool first = true; + + *x1 = CoordT(1); + *y1 = CoordT(1); + *x2 = CoordT(0); + *y2 = CoordT(0); + + vs.rewind(path_id); + unsigned cmd; + while(!is_stop(cmd = vs.vertex(&x, &y))) + { + if(is_vertex(cmd)) + { + if(first) + { + *x1 = CoordT(x); + *y1 = CoordT(y); + *x2 = CoordT(x); + *y2 = CoordT(y); + first = false; + } + else + { + if(CoordT(x) < *x1) *x1 = CoordT(x); + if(CoordT(y) < *y1) *y1 = CoordT(y); + if(CoordT(x) > *x2) *x2 = CoordT(x); + if(CoordT(y) > *y2) *y2 = CoordT(y); + } + } + } + return *x1 <= *x2 && *y1 <= *y2; + } + + +} + +#endif |