WIP: SVG import & rasterization
Updated AntiGrain (agg) library to 2.5 Added agg_svg library from AntiGrain 2.5 added src/slic3r/Utils/SVGImport.cpp/hpp
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bubnikv
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src/agg_svg/agg_vcgen_stroke.cpp
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219
src/agg_svg/agg_vcgen_stroke.cpp
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//----------------------------------------------------------------------------
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// Anti-Grain Geometry (AGG) - Version 2.5
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// A high quality rendering engine for C++
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// Copyright (C) 2002-2006 Maxim Shemanarev
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// Contact: mcseem@antigrain.com
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// mcseemagg@yahoo.com
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// http://antigrain.com
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//
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// AGG is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public License
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// as published by the Free Software Foundation; either version 2
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// of the License, or (at your option) any later version.
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//
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// AGG is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with AGG; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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// MA 02110-1301, USA.
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//----------------------------------------------------------------------------
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#include <math.h>
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#include <agg/agg_vcgen_stroke.h>
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#include <agg/agg_shorten_path.h>
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namespace agg
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{
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//------------------------------------------------------------------------
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vcgen_stroke::vcgen_stroke() :
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m_stroker(),
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m_src_vertices(),
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m_out_vertices(),
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m_shorten(0.0),
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m_closed(0),
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m_status(initial),
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m_src_vertex(0),
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m_out_vertex(0)
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{
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}
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//------------------------------------------------------------------------
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void vcgen_stroke::remove_all()
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{
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m_src_vertices.remove_all();
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m_closed = 0;
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m_status = initial;
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}
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//------------------------------------------------------------------------
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void vcgen_stroke::add_vertex(double x, double y, unsigned cmd)
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{
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m_status = initial;
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if(is_move_to(cmd))
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{
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m_src_vertices.modify_last(vertex_dist(x, y));
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}
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else
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{
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if(is_vertex(cmd))
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{
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m_src_vertices.add(vertex_dist(x, y));
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}
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else
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{
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m_closed = get_close_flag(cmd);
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}
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}
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}
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//------------------------------------------------------------------------
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void vcgen_stroke::rewind(unsigned)
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{
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if(m_status == initial)
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{
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m_src_vertices.close(m_closed != 0);
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shorten_path(m_src_vertices, m_shorten, m_closed);
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if(m_src_vertices.size() < 3) m_closed = 0;
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}
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m_status = ready;
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m_src_vertex = 0;
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m_out_vertex = 0;
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}
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//------------------------------------------------------------------------
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unsigned vcgen_stroke::vertex(double* x, double* y)
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{
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unsigned cmd = path_cmd_line_to;
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while(!is_stop(cmd))
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{
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switch(m_status)
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{
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case initial:
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rewind(0);
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case ready:
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if(m_src_vertices.size() < 2 + unsigned(m_closed != 0))
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{
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cmd = path_cmd_stop;
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break;
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}
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m_status = m_closed ? outline1 : cap1;
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cmd = path_cmd_move_to;
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m_src_vertex = 0;
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m_out_vertex = 0;
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break;
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case cap1:
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m_stroker.calc_cap(m_out_vertices,
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m_src_vertices[0],
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m_src_vertices[1],
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m_src_vertices[0].dist);
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m_src_vertex = 1;
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m_prev_status = outline1;
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m_status = out_vertices;
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m_out_vertex = 0;
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break;
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case cap2:
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m_stroker.calc_cap(m_out_vertices,
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m_src_vertices[m_src_vertices.size() - 1],
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m_src_vertices[m_src_vertices.size() - 2],
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m_src_vertices[m_src_vertices.size() - 2].dist);
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m_prev_status = outline2;
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m_status = out_vertices;
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m_out_vertex = 0;
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break;
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case outline1:
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if(m_closed)
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{
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if(m_src_vertex >= m_src_vertices.size())
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{
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m_prev_status = close_first;
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m_status = end_poly1;
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break;
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}
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}
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else
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{
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if(m_src_vertex >= m_src_vertices.size() - 1)
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{
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m_status = cap2;
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break;
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}
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}
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m_stroker.calc_join(m_out_vertices,
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m_src_vertices.prev(m_src_vertex),
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m_src_vertices.curr(m_src_vertex),
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m_src_vertices.next(m_src_vertex),
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m_src_vertices.prev(m_src_vertex).dist,
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m_src_vertices.curr(m_src_vertex).dist);
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++m_src_vertex;
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m_prev_status = m_status;
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m_status = out_vertices;
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m_out_vertex = 0;
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break;
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case close_first:
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m_status = outline2;
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cmd = path_cmd_move_to;
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case outline2:
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if(m_src_vertex <= unsigned(m_closed == 0))
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{
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m_status = end_poly2;
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m_prev_status = stop;
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break;
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}
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--m_src_vertex;
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m_stroker.calc_join(m_out_vertices,
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m_src_vertices.next(m_src_vertex),
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m_src_vertices.curr(m_src_vertex),
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m_src_vertices.prev(m_src_vertex),
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m_src_vertices.curr(m_src_vertex).dist,
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m_src_vertices.prev(m_src_vertex).dist);
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m_prev_status = m_status;
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m_status = out_vertices;
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m_out_vertex = 0;
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break;
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case out_vertices:
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if(m_out_vertex >= m_out_vertices.size())
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{
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m_status = m_prev_status;
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}
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else
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{
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const point_d& c = m_out_vertices[m_out_vertex++];
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*x = c.x;
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*y = c.y;
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return cmd;
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}
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break;
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case end_poly1:
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m_status = m_prev_status;
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return path_cmd_end_poly | path_flags_close | path_flags_ccw;
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case end_poly2:
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m_status = m_prev_status;
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return path_cmd_end_poly | path_flags_close | path_flags_cw;
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case stop:
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cmd = path_cmd_stop;
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break;
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}
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}
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return cmd;
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}
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}
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