//---------------------------------------------------------------------------- // 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 //---------------------------------------------------------------------------- // // 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_INCLUDED #define AGG_SPAN_PATTERN_INCLUDED #include "agg_basics.h" #include "agg_rendering_buffer.h" #include "agg_span_generator.h" namespace agg { //---------------------------------------------------span_pattern_base template class span_pattern_base : public span_generator { public: typedef ColorT color_type; typedef typename ColorT::value_type value_type; typedef Allocator alloc_type; enum { base_mask = color_type::base_mask }; //---------------------------------------------------------------- span_pattern_base(alloc_type& alloc) : span_generator(alloc) {} //---------------------------------------------------------------- span_pattern_base(alloc_type& alloc, const rendering_buffer& src, unsigned offset_x, unsigned offset_y, double alpha) : span_generator(alloc), m_src(&src), m_offset_x(offset_x), m_offset_y(offset_y), m_alpha(value_type(alpha * double(base_mask))) {} //---------------------------------------------------------------- const rendering_buffer& source_image() const { return *m_src; } unsigned offset_x() const { return m_offset_x; } unsigned offset_y() const { return m_offset_y; } double alpha() const { return m_alpha / double(base_mask); } value_type alpha_int() const { return m_alpha; } //---------------------------------------------------------------- void source_image(const rendering_buffer& v) { m_src = &v; } void offset_x(unsigned v) { m_offset_x = v; } void offset_y(unsigned v) { m_offset_y = v; } void alpha(double v) { m_alpha = value_type(v * double(base_mask)); } //---------------------------------------------------------------- private: const rendering_buffer* m_src; unsigned m_offset_x; unsigned m_offset_y; value_type m_alpha; }; //---------------------------------------------------wrap_mode_repeat class wrap_mode_repeat { public: wrap_mode_repeat(unsigned size) : m_size(size), m_add(size * (0x3FFFFFFF / size)), m_value(0) {} AGG_INLINE unsigned operator() (int v) { return m_value = (unsigned(v) + m_add) % m_size; } AGG_INLINE unsigned operator++ () { ++m_value; if(m_value >= m_size) m_value = 0; return m_value; } private: unsigned m_size; unsigned m_add; unsigned m_value; }; //---------------------------------------------wrap_mode_repeat_pow2 class wrap_mode_repeat_pow2 { public: wrap_mode_repeat_pow2(unsigned size) : m_value(0) { m_mask = 1; while(m_mask < size) m_mask = (m_mask << 1) | 1; m_mask >>= 1; } AGG_INLINE unsigned operator() (int v) { return m_value = unsigned(v) & m_mask; } AGG_INLINE unsigned operator++ () { ++m_value; if(m_value > m_mask) m_value = 0; return m_value; } private: unsigned m_mask; unsigned m_value; }; //----------------------------------------wrap_mode_repeat_auto_pow2 class wrap_mode_repeat_auto_pow2 { public: wrap_mode_repeat_auto_pow2(unsigned size) : m_size(size), m_add(size * (0x3FFFFFFF / size)), m_mask((m_size & (m_size-1)) ? 0 : m_size-1), m_value(0) {} AGG_INLINE unsigned operator() (int v) { if(m_mask) return m_value = unsigned(v) & m_mask; return m_value = (unsigned(v) + m_add) % m_size; } AGG_INLINE unsigned operator++ () { ++m_value; if(m_value >= m_size) m_value = 0; return m_value; } private: unsigned m_size; unsigned m_add; unsigned m_mask; unsigned m_value; }; //--------------------------------------------------wrap_mode_reflect class wrap_mode_reflect { public: wrap_mode_reflect(unsigned size) : m_size(size), m_size2(size * 2), m_add(m_size2 * (0x3FFFFFFF / m_size2)), m_value(0) {} AGG_INLINE unsigned operator() (int v) { m_value = (unsigned(v) + m_add) % m_size2; if(m_value >= m_size) return m_size2 - m_value - 1; return m_value; } AGG_INLINE unsigned operator++ () { ++m_value; if(m_value >= m_size2) m_value = 0; if(m_value >= m_size) return m_size2 - m_value - 1; return m_value; } private: unsigned m_size; unsigned m_size2; unsigned m_add; unsigned m_value; }; //-------------------------------------------wrap_mode_reflect_pow2 class wrap_mode_reflect_pow2 { public: wrap_mode_reflect_pow2(unsigned size) : m_value(0) { m_mask = 1; m_size = 1; while(m_mask < size) { m_mask = (m_mask << 1) | 1; m_size <<= 1; } } AGG_INLINE unsigned operator() (int v) { m_value = unsigned(v) & m_mask; if(m_value >= m_size) return m_mask - m_value; return m_value; } AGG_INLINE unsigned operator++ () { ++m_value; m_value &= m_mask; if(m_value >= m_size) return m_mask - m_value; return m_value; } private: unsigned m_size; unsigned m_mask; unsigned m_value; }; //---------------------------------------wrap_mode_reflect_auto_pow2 class wrap_mode_reflect_auto_pow2 { public: wrap_mode_reflect_auto_pow2(unsigned size) : m_size(size), m_size2(size * 2), m_add(m_size2 * (0x3FFFFFFF / m_size2)), m_mask((m_size2 & (m_size2-1)) ? 0 : m_size2-1), m_value(0) {} AGG_INLINE unsigned operator() (int v) { m_value = m_mask ? unsigned(v) & m_mask : (unsigned(v) + m_add) % m_size2; if(m_value >= m_size) return m_size2 - m_value - 1; return m_value; } AGG_INLINE unsigned operator++ () { ++m_value; if(m_value >= m_size2) m_value = 0; if(m_value >= m_size) return m_size2 - m_value - 1; return m_value; } private: unsigned m_size; unsigned m_size2; unsigned m_add; unsigned m_mask; unsigned m_value; }; } #endif