//---------------------------------------------------------------------------- // 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 //---------------------------------------------------------------------------- // // Adaptation for high precision colors has been sponsored by // Liberty Technology Systems, Inc., visit http://lib-sys.com // // Liberty Technology Systems, Inc. is the provider of // PostScript and PDF technology for software developers. // //---------------------------------------------------------------------------- #ifndef AGG_SPAN_PATTERN_RGBA_INCLUDED #define AGG_SPAN_PATTERN_RGBA_INCLUDED #include "agg_basics.h" namespace agg { //======================================================span_pattern_rgba template<class Source> class span_pattern_rgba { public: typedef Source source_type; typedef typename source_type::color_type color_type; typedef typename source_type::order_type order_type; typedef typename color_type::value_type value_type; typedef typename color_type::calc_type calc_type; //-------------------------------------------------------------------- span_pattern_rgba() {} span_pattern_rgba(source_type& src, unsigned offset_x, unsigned offset_y) : m_src(&src), m_offset_x(offset_x), m_offset_y(offset_y) {} //-------------------------------------------------------------------- void attach(source_type& v) { m_src = &v; } source_type& source() { return *m_src; } const source_type& source() const { return *m_src; } //-------------------------------------------------------------------- void offset_x(unsigned v) { m_offset_x = v; } void offset_y(unsigned v) { m_offset_y = v; } unsigned offset_x() const { return m_offset_x; } unsigned offset_y() const { return m_offset_y; } void alpha(value_type) {} value_type alpha() const { return 0; } //-------------------------------------------------------------------- void prepare() {} void generate(color_type* span, int x, int y, unsigned len) { x += m_offset_x; y += m_offset_y; const value_type* p = (const value_type*)m_src->span(x, y, len); do { span->r = p[order_type::R]; span->g = p[order_type::G]; span->b = p[order_type::B]; span->a = p[order_type::A]; p = (const value_type*)m_src->next_x(); ++span; } while(--len); } private: source_type* m_src; unsigned m_offset_x; unsigned m_offset_y; }; } #endif