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Diffstat (limited to 'agg/inc/agg_span_subdiv_adaptor.h')
-rwxr-xr-x | agg/inc/agg_span_subdiv_adaptor.h | 141 |
1 files changed, 141 insertions, 0 deletions
diff --git a/agg/inc/agg_span_subdiv_adaptor.h b/agg/inc/agg_span_subdiv_adaptor.h new file mode 100755 index 000000000000..60196d705bdb --- /dev/null +++ b/agg/inc/agg_span_subdiv_adaptor.h @@ -0,0 +1,141 @@ +//---------------------------------------------------------------------------- +// 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 +//---------------------------------------------------------------------------- +#ifndef AGG_SPAN_SUBDIV_ADAPTOR_INCLUDED +#define AGG_SPAN_SUBDIV_ADAPTOR_INCLUDED + +#include "agg_basics.h" + +namespace agg +{ + + //=================================================span_subdiv_adaptor + template<class Interpolator, unsigned SubpixelShift = 8> + class span_subdiv_adaptor + { + public: + typedef Interpolator interpolator_type; + typedef typename interpolator_type::trans_type trans_type; + + enum + { + subpixel_shift = SubpixelShift, + subpixel_size = 1 << subpixel_shift + }; + + + //---------------------------------------------------------------- + span_subdiv_adaptor() : + m_subdiv_shift(4), + m_subdiv_size(1 << m_subdiv_shift), + m_subdiv_mask(m_subdiv_size - 1) {} + + span_subdiv_adaptor(interpolator_type& interpolator, + unsigned subdiv_shift = 4) : + m_subdiv_shift(subdiv_shift), + m_subdiv_size(1 << m_subdiv_shift), + m_subdiv_mask(m_subdiv_size - 1), + m_interpolator(&interpolator) {} + + span_subdiv_adaptor(interpolator_type& interpolator, + double x, double y, unsigned len, + unsigned subdiv_shift = 4) : + m_subdiv_shift(subdiv_shift), + m_subdiv_size(1 << m_subdiv_shift), + m_subdiv_mask(m_subdiv_size - 1), + m_interpolator(&interpolator) + { + begin(x, y, len); + } + + + //---------------------------------------------------------------- + const interpolator_type& interpolator() const { return *m_interpolator; } + void interpolator(interpolator_type& intr) { m_interpolator = &intr; } + + //---------------------------------------------------------------- + const trans_type& transformer() const + { + return *m_interpolator->transformer(); + } + void transformer(const trans_type& trans) + { + m_interpolator->transformer(trans); + } + + //---------------------------------------------------------------- + unsigned subdiv_shift() const { return m_subdiv_shift; } + void subdiv_shift(unsigned shift) + { + m_subdiv_shift = shift; + m_subdiv_size = 1 << m_subdiv_shift; + m_subdiv_mask = m_subdiv_size - 1; + } + + //---------------------------------------------------------------- + void begin(double x, double y, unsigned len) + { + m_pos = 1; + m_src_x = int(x * subpixel_size) + subpixel_size; + m_src_y = y; + m_len = len; + if(len > m_subdiv_size) len = m_subdiv_size; + m_interpolator->begin(x, y, len); + } + + //---------------------------------------------------------------- + void operator++() + { + ++(*m_interpolator); + if(m_pos >= m_subdiv_size) + { + unsigned len = m_len; + if(len > m_subdiv_size) len = m_subdiv_size; + m_interpolator->resynchronize(double(m_src_x) / double(subpixel_size) + len, + m_src_y, + len); + m_pos = 0; + } + m_src_x += subpixel_size; + ++m_pos; + --m_len; + } + + //---------------------------------------------------------------- + void coordinates(int* x, int* y) const + { + m_interpolator->coordinates(x, y); + } + + //---------------------------------------------------------------- + void local_scale(int* x, int* y) const + { + m_interpolator->local_scale(x, y); + } + + + private: + unsigned m_subdiv_shift; + unsigned m_subdiv_size; + unsigned m_subdiv_mask; + interpolator_type* m_interpolator; + int m_src_x; + double m_src_y; + unsigned m_pos; + unsigned m_len; + }; + +} + +#endif |