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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
//
//----------------------------------------------------------------------------
//
// Concatenation of two paths. Usually used to combine lines or curves
// with markers such as arrowheads
//
// [Pascal Port History] -----------------------------------------------------
//
// 26.02.2006-Milano: Unit port establishment
//
{ agg_conv_concat.pas }
unit
agg_conv_concat ;
INTERFACE
{$I agg_mode.inc }
uses
agg_basics ,
agg_vertex_source ;
{ TYPES DEFINITION }
type
conv_concat = object(vertex_source )
m_source1 ,
m_source2 : vertex_source_ptr;
m_status : int;
constructor Construct(source1 ,source2 : vertex_source_ptr );
procedure set_source1(source : vertex_source_ptr );
procedure set_source2(source : vertex_source_ptr );
procedure rewind(path_id : unsigned ); virtual;
function vertex(x ,y : double_ptr ) : unsigned; virtual;
end;
{ GLOBAL PROCEDURES }
IMPLEMENTATION
{ LOCAL VARIABLES & CONSTANTS }
{ UNIT IMPLEMENTATION }
{ CONSTRUCT }
constructor conv_concat.Construct;
begin
m_source1:=source1;
m_source2:=source2;
m_status :=2;
end;
{ SET_SOURCE1 }
procedure conv_concat.set_source1;
begin
m_source1:=source;
end;
{ SET_SOURCE2 }
procedure conv_concat.set_source2;
begin
m_source2:=source;
end;
{ REWIND }
procedure conv_concat.rewind;
begin
m_source1.rewind(path_id );
m_source2.rewind(0 );
m_status:=0;
end;
{ VERTEX }
function conv_concat.vertex;
var
cmd : unsigned;
begin
if m_status = 0 then
begin
cmd:=m_source1.vertex(x ,y );
if not is_stop(cmd ) then
begin
result:=cmd;
exit;
end;
m_status:=1;
end;
if m_status = 1 then
begin
cmd:=m_source2.vertex(x ,y );
if not is_stop(cmd ) then
begin
result:=cmd;
exit;
end;
m_status:=2;
end;
result:=path_cmd_stop;
end;
END.
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