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//----------------------------------------------------------------------------
// Anti-Grain Geometry - Version 2.4 (Public License)
// Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com)
//
// Anti-Grain Geometry - Version 2.4 Release Milano 3 (AggPas 2.4 RM3)
// Pascal Port By: Milan Marusinec alias Milano
// milan@marusinec.sk
// http://www.aggpas.org
// Copyright (c) 2005-2006
//
// 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
//
// [Pascal Port History] -----------------------------------------------------
//
// 15.01.2006-Milano: Unit port establishment
//
{ agg_rasterizer_outline.pas }
unit
agg_rasterizer_outline ;
INTERFACE
{$I agg_mode.inc }
uses
agg_basics ,
agg_renderer_primitives ,
agg_vertex_source ;
{ TYPES DEFINITION }
type
rasterizer_outline_ptr = ^rasterizer_outline;
rasterizer_outline = object
m_ren : renderer_primitives_ptr;
m_start_x ,
m_start_y : int;
m_vertices : unsigned;
constructor Construct(ren : renderer_primitives_ptr );
procedure move_to(x ,y : int );
procedure line_to(x ,y : int );
procedure move_to_d(x ,y : double );
procedure line_to_d(x ,y : double );
procedure close;
procedure add_vertex(x ,y : double; cmd : unsigned );
procedure add_path (vs : vertex_source_ptr; path_id : unsigned = 0 );
end;
{ GLOBAL PROCEDURES }
IMPLEMENTATION
{ LOCAL VARIABLES & CONSTANTS }
{ UNIT IMPLEMENTATION }
{ CONSTRUCT }
constructor rasterizer_outline.Construct;
begin
m_ren:=ren;
m_start_x:=0;
m_start_y:=0;
m_vertices:=0;
end;
{ MOVE_TO }
procedure rasterizer_outline.move_to;
begin
m_vertices:=1;
m_start_x:=x;
m_start_y:=y;
m_ren.move_to(x ,y );
end;
{ LINE_TO }
procedure rasterizer_outline.line_to;
begin
inc(m_vertices );
m_ren.line_to(x ,y );
end;
{ MOVE_TO_D }
procedure rasterizer_outline.move_to_d;
begin
move_to(m_ren.coord(x ) ,m_ren.coord(y ) );
end;
{ LINE_TO_D }
procedure rasterizer_outline.line_to_d;
begin
line_to(m_ren.coord(x ) ,m_ren.coord(y ) );
end;
{ CLOSE }
procedure rasterizer_outline.close;
begin
if m_vertices > 2 then
line_to(m_start_x ,m_start_y );
m_vertices:=0;
end;
{ ADD_VERTEX }
procedure rasterizer_outline.add_vertex;
begin
if is_move_to(cmd ) then
move_to_d(x ,y )
else
if is_end_poly(cmd ) then
if is_closed(cmd ) then
close
else
else
line_to_d(x ,y );
end;
{ ADD_PATH }
procedure rasterizer_outline.add_path;
var
cmd : unsigned;
x ,y : double;
begin
vs.rewind(path_id );
cmd:=vs.vertex(@x ,@y );
while not is_stop(cmd ) do
begin
add_vertex(x ,y ,cmd );
cmd:=vs.vertex(@x ,@y );
end;
end;
END.
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