//---------------------------------------------------------------------------- // Anti-Grain Geometry (AGG) - Version 2.5 // A high quality rendering engine for C++ // Copyright (C) 2002-2006 Maxim Shemanarev // Contact: mcseem@antigrain.com // mcseemagg@yahoo.com // http://antigrain.com // // AGG is free software; you can redistribute it and/or // modify it under the terms of the GNU General Public License // as published by the Free Software Foundation; either version 2 // of the License, or (at your option) any later version. // // AGG is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU General Public License for more details. // // You should have received a copy of the GNU General Public License // along with AGG; if not, write to the Free Software // Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, // MA 02110-1301, USA. //---------------------------------------------------------------------------- #ifndef AGG_PIXFMT_AMASK_ADAPTOR_INCLUDED #define AGG_PIXFMT_AMASK_ADAPTOR_INCLUDED #include <string.h> #include "agg_array.h" #include "agg_rendering_buffer.h" namespace agg { //==================================================pixfmt_amask_adaptor template<class PixFmt, class AlphaMask> class pixfmt_amask_adaptor { public: typedef PixFmt pixfmt_type; typedef typename pixfmt_type::color_type color_type; typedef typename pixfmt_type::row_data row_data; typedef AlphaMask amask_type; typedef typename amask_type::cover_type cover_type; private: enum span_extra_tail_e { span_extra_tail = 256 }; void realloc_span(unsigned len) { if(len > m_span.size()) { m_span.resize(len + span_extra_tail); } } void init_span(unsigned len) { realloc_span(len); memset(&m_span[0], amask_type::cover_full, len * sizeof(cover_type)); } void init_span(unsigned len, const cover_type* covers) { realloc_span(len); memcpy(&m_span[0], covers, len * sizeof(cover_type)); } public: pixfmt_amask_adaptor(pixfmt_type& pixf, const amask_type& mask) : m_pixf(&pixf), m_mask(&mask), m_span() {} void attach_pixfmt(pixfmt_type& pixf) { m_pixf = &pixf; } void attach_alpha_mask(const amask_type& mask) { m_mask = &mask; } //-------------------------------------------------------------------- template<class PixFmt2> bool attach_pixfmt(PixFmt2& pixf, int x1, int y1, int x2, int y2) { return m_pixf->attach(pixf, x1, y1, x2, y2); } //-------------------------------------------------------------------- unsigned width() const { return m_pixf->width(); } unsigned height() const { return m_pixf->height(); } //-------------------------------------------------------------------- color_type pixel(int x, int y) { return m_pixf->pixel(x, y); } //-------------------------------------------------------------------- void copy_pixel(int x, int y, const color_type& c) { m_pixf->blend_pixel(x, y, c, m_mask->pixel(x, y)); } //-------------------------------------------------------------------- void blend_pixel(int x, int y, const color_type& c, cover_type cover) { m_pixf->blend_pixel(x, y, c, m_mask->combine_pixel(x, y, cover)); } //-------------------------------------------------------------------- void copy_hline(int x, int y, unsigned len, const color_type& c) { realloc_span(len); m_mask->fill_hspan(x, y, &m_span[0], len); m_pixf->blend_solid_hspan(x, y, len, c, &m_span[0]); } //-------------------------------------------------------------------- void blend_hline(int x, int y, unsigned len, const color_type& c, cover_type cover) { init_span(len); m_mask->combine_hspan(x, y, &m_span[0], len); m_pixf->blend_solid_hspan(x, y, len, c, &m_span[0]); } //-------------------------------------------------------------------- void copy_vline(int x, int y, unsigned len, const color_type& c) { realloc_span(len); m_mask->fill_vspan(x, y, &m_span[0], len); m_pixf->blend_solid_vspan(x, y, len, c, &m_span[0]); } //-------------------------------------------------------------------- void blend_vline(int x, int y, unsigned len, const color_type& c, cover_type cover) { init_span(len); m_mask->combine_vspan(x, y, &m_span[0], len); m_pixf->blend_solid_vspan(x, y, len, c, &m_span[0]); } //-------------------------------------------------------------------- void copy_from(const rendering_buffer& from, int xdst, int ydst, int xsrc, int ysrc, unsigned len) { m_pixf->copy_from(from, xdst, ydst, xsrc, ysrc, len); } //-------------------------------------------------------------------- void blend_solid_hspan(int x, int y, unsigned len, const color_type& c, const cover_type* covers) { init_span(len, covers); m_mask->combine_hspan(x, y, &m_span[0], len); m_pixf->blend_solid_hspan(x, y, len, c, &m_span[0]); } //-------------------------------------------------------------------- void blend_solid_vspan(int x, int y, unsigned len, const color_type& c, const cover_type* covers) { init_span(len, covers); m_mask->combine_vspan(x, y, &m_span[0], len); m_pixf->blend_solid_vspan(x, y, len, c, &m_span[0]); } //-------------------------------------------------------------------- void copy_color_hspan(int x, int y, unsigned len, const color_type* colors) { realloc_span(len); m_mask->fill_hspan(x, y, &m_span[0], len); m_pixf->blend_color_hspan(x, y, len, colors, &m_span[0], cover_full); } //-------------------------------------------------------------------- void copy_color_vspan(int x, int y, unsigned len, const color_type* colors) { realloc_span(len); m_mask->fill_vspan(x, y, &m_span[0], len); m_pixf->blend_color_vspan(x, y, len, colors, &m_span[0], cover_full); } //-------------------------------------------------------------------- void blend_color_hspan(int x, int y, unsigned len, const color_type* colors, const cover_type* covers, cover_type cover = cover_full) { if(covers) { init_span(len, covers); m_mask->combine_hspan(x, y, &m_span[0], len); } else { realloc_span(len); m_mask->fill_hspan(x, y, &m_span[0], len); } m_pixf->blend_color_hspan(x, y, len, colors, &m_span[0], cover); } //-------------------------------------------------------------------- void blend_color_vspan(int x, int y, unsigned len, const color_type* colors, const cover_type* covers, cover_type cover = cover_full) { if(covers) { init_span(len, covers); m_mask->combine_vspan(x, y, &m_span[0], len); } else { realloc_span(len); m_mask->fill_vspan(x, y, &m_span[0], len); } m_pixf->blend_color_vspan(x, y, len, colors, &m_span[0], cover); } private: pixfmt_type* m_pixf; const amask_type* m_mask; pod_array<cover_type> m_span; }; } #endif |