synfig-studio/trunk/src/gtkmm/renderer_ducks.cpp

   1 /* === S Y N F I G ========================================================= */
   2 /*!     \file renderer_ducks.cpp
   3 **      \brief Template File
   4 **
   5 **      $Id$
   6 **
   7 **      \legal
   8 **      Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
   9 **      Copyright (c) 2007, 2008 Chris Moore
  10 **
  11 **      This package is free software; you can redistribute it and/or
  12 **      modify it under the terms of the GNU General Public License as
  13 **      published by the Free Software Foundation; either version 2 of
  14 **      the License, or (at your option) any later version.
  15 **
  16 **      This package is distributed in the hope that it will be useful,
  17 **      but WITHOUT ANY WARRANTY; without even the implied warranty of
  18 **      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  19 **      General Public License for more details.
  20 **      \endlegal
  21 */
  22 /* ========================================================================= */
  23
  24 /* === H E A D E R S ======================================================= */
  25
  26 #ifdef USING_PCH
  27 #       include "pch.h"
  28 #else
  29 #ifdef HAVE_CONFIG_H
  30 #       include <config.h>
  31 #endif
  32
  33 #include "renderer_ducks.h"
  34 #include "workarea.h"
  35 #include "duckmatic.h"
  36 #include <ETL/bezier>
  37 #include <ETL/misc>
  38 #include "widget_color.h"
  39 #include <synfig/distance.h>
  40 #include <synfig/valuenode_blinecalcvertex.h>
  41 #include <synfig/valuenode_bline.h>
  42 #include "app.h"
  43
  44 #include "general.h"
  45
  46 #endif
  47
  48 /* === U S I N G =========================================================== */
  49
  50 using namespace std;
  51 using namespace etl;
  52 using namespace synfig;
  53 using namespace studio;
  54
  55 /* === M A C R O S ========================================================= */
  56
  57 /* === G L O B A L S ======================================================= */
  58
  59 /* === P R O C E D U R E S ================================================= */
  60
  61 /* === M E T H O D S ======================================================= */
  62
  63 bool
  64 restrict_blinevertex_duck(etl::handle<Duck> duck, WorkArea& w_area, synfig::Point *point)
  65 {
  66         synfig::Point sub_trans_origin(duck->get_sub_trans_origin());
  67         etl::handle<Duck> origin_duck = duck->get_origin_duck();
  68         bool origin_changed = false;
  69         if(origin_duck)
  70                 origin_changed = restrict_blinevertex_duck(origin_duck, w_area, &sub_trans_origin);
  71
  72         if( ValueNode_BLineCalcVertex::Handle bline_vertex =
  73                 ValueNode_BLineCalcVertex::Handle::cast_dynamic(duck->get_value_desc().get_value_node())
  74         )
  75         {
  76                 synfig::Point closest_point = duck->get_point();
  77                 synfig::Real radius = 0.0;
  78                 synfig::find_closest_point(
  79                         ( *bline_vertex->get_link(bline_vertex->get_link_index_from_name("bline")) )( w_area.get_time() ),
  80                         duck->get_point(),
  81                         radius,
  82                         ( *bline_vertex->get_link(bline_vertex->get_link_index_from_name("loop")) )( w_area.get_time() ).get(bool()),
  83                         &closest_point
  84                 );
  85
  86                 if(closest_point != duck->get_point())
  87                 {
  88                         *point = closest_point * duck->get_scalar() + sub_trans_origin;
  89                         return true;
  90                 }
  91         }
  92
  93         if(origin_changed)
  94         {
  95                 *point = duck->get_point() * duck->get_scalar() + sub_trans_origin;
  96                 return true;
  97         }
  98
  99         return false;
 100 }
 101
 102 Renderer_Ducks::~Renderer_Ducks()
 103 {
 104 }
 105
 106 /*
 107 bool
 108 Renderer_Ducks::get_enabled_vfunc()const
 109 {
 110         return get_work_area()->grid_status();
 111 }
 112 */
 113
 114 struct ScreenDuck
 115 {
 116         synfig::Point pos;
 117         Gdk::Color color;
 118         bool selected;
 119         bool hover;
 120         Real width;
 121
 122         ScreenDuck():width(0) { }
 123 };
 124
 125 void
 126 Renderer_Ducks::render_vfunc(
 127         const Glib::RefPtr<Gdk::Drawable>& drawable,
 128         const Gdk::Rectangle& /*expose_area*/
 129 )
 130 {
 131         assert(get_work_area());
 132         if(!get_work_area())
 133                 return;
 134
 135         const synfig::Vector focus_point(get_work_area()->get_focus_point());
 136
 137
 138         int drawable_w,drawable_h;
 139         drawable->get_size(drawable_w,drawable_h);
 140
 141         Glib::RefPtr<Gdk::GC> gc(Gdk::GC::create(drawable));
 142
 143
 144         const synfig::Vector::value_type window_startx(get_work_area()->get_window_tl()[0]);
 145         const synfig::Vector::value_type window_starty(get_work_area()->get_window_tl()[1]);
 146
 147         const float pw(get_pw()),ph(get_ph());
 148
 149         const std::list<etl::handle<Duckmatic::Bezier> >& bezier_list(get_work_area()->bezier_list());
 150         const bool solid_lines(get_work_area()->solid_lines);
 151
 152         const std::list<handle<Duckmatic::Stroke> >& stroke_list(get_work_area()->stroke_list());
 153
 154         Glib::RefPtr<Pango::Layout> layout(Pango::Layout::create(get_work_area()->get_pango_context()));
 155
 156         // Render the strokes
 157         for(std::list<handle<Duckmatic::Stroke> >::const_iterator iter=stroke_list.begin();iter!=stroke_list.end();++iter)
 158         {
 159                 Point window_start(window_startx,window_starty);
 160                 vector<Gdk::Point> points;
 161                 std::list<synfig::Point>::iterator iter2;
 162                 Point holder;
 163
 164                 for(iter2=(*iter)->stroke_data->begin();iter2!=(*iter)->stroke_data->end();++iter2)
 165                 {
 166                         holder=*iter2-window_start;
 167                         holder[0]/=pw;holder[1]/=ph;
 168                         points.push_back(Gdk::Point(round_to_int(holder[0]),round_to_int(holder[1])));
 169                 }
 170
 171                 gc->set_rgb_fg_color(colorconv_synfig2gdk((*iter)->color));
 172                 gc->set_function(Gdk::COPY);
 173                 gc->set_line_attributes(1,Gdk::LINE_SOLID,Gdk::CAP_BUTT,Gdk::JOIN_MITER);
 174
 175                 // Draw the stroke
 176                 drawable->draw_lines(gc, Glib::ArrayHandle<Gdk::Point>(points));
 177         }
 178
 179
 180
 181         // Render the beziers
 182         for(std::list<handle<Duckmatic::Bezier> >::const_iterator iter=bezier_list.begin();iter!=bezier_list.end();++iter)
 183         {
 184                 Point sub_trans_p1((*iter)->p1->get_sub_trans_point());
 185                 Point sub_trans_p2((*iter)->p2->get_sub_trans_point());
 186                 Point sub_trans_c1((*iter)->c1->get_sub_trans_point());
 187                 Point sub_trans_c2((*iter)->c2->get_sub_trans_point());
 188
 189                 WorkArea* w_area = get_work_area();
 190                 restrict_blinevertex_duck((*iter)->p1, *w_area, &sub_trans_p1);
 191                 restrict_blinevertex_duck((*iter)->p2, *w_area, &sub_trans_p2);
 192                 restrict_blinevertex_duck((*iter)->c1, *w_area, &sub_trans_c1);
 193                 restrict_blinevertex_duck((*iter)->c2, *w_area, &sub_trans_c2);
 194
 195                 Point window_start(window_startx,window_starty);
 196                 Point p1((*iter)->p1->get_transform_stack().perform(sub_trans_p1)-window_start);
 197                 Point p2((*iter)->p2->get_transform_stack().perform(sub_trans_p2)-window_start);
 198                 Point c1((*iter)->c1->get_transform_stack().perform(sub_trans_c1)-window_start);
 199                 Point c2((*iter)->c2->get_transform_stack().perform(sub_trans_c2)-window_start);
 200                 p1[0]/=pw;p1[1]/=ph;
 201                 p2[0]/=pw;p2[1]/=ph;
 202                 c1[0]/=pw;c1[1]/=ph;
 203                 c2[0]/=pw;c2[1]/=ph;
 204                 bezier<Point> curve(p1,c1,c2,p2);
 205                 vector<Gdk::Point> points;
 206
 207                 float f;
 208                 Point pt;
 209                 for(f=0;f<1.0;f+=1.0/17.0)
 210                 {
 211                         pt=curve(f);
 212                         points.push_back(Gdk::Point(round_to_int(pt[0]),round_to_int(pt[1])));
 213                 }
 214                 points.push_back(Gdk::Point(round_to_int(p2[0]),round_to_int(p2[1])));
 215
 216                 // Draw the curve
 217 /*              if(solid_lines)
 218                 {
 219                         gc->set_rgb_fg_color(DUCK_COLOR_BEZIER_1);
 220                         gc->set_function(Gdk::COPY);
 221                         gc->set_line_attributes(3,Gdk::LINE_SOLID,Gdk::CAP_BUTT,Gdk::JOIN_MITER);
 222                         drawable->draw_lines(gc, Glib::ArrayHandle<Gdk::Point>(points));
 223                         gc->set_rgb_fg_color(DUCK_COLOR_BEZIER_2);
 224                         gc->set_line_attributes(1,Gdk::LINE_SOLID,Gdk::CAP_BUTT,Gdk::JOIN_MITER);
 225                         drawable->draw_lines(gc, Glib::ArrayHandle<Gdk::Point>(points));
 226                 }
 227                 else
 228 */
 229                 {
 230 //                      gc->set_rgb_fg_color(Gdk::Color("#ffffff"));
 231 //                      gc->set_function(Gdk::INVERT);
 232 //                      gc->set_line_attributes(1,Gdk::LINE_SOLID,Gdk::CAP_BUTT,Gdk::JOIN_MITER);
 233 //                      drawable->draw_lines(gc, Glib::ArrayHandle<Gdk::Point>(points));
 234                         gc->set_rgb_fg_color(DUCK_COLOR_BEZIER_1);
 235                         gc->set_function(Gdk::COPY);
 236                         gc->set_line_attributes(1,Gdk::LINE_SOLID,Gdk::CAP_BUTT,Gdk::JOIN_MITER);
 237                         drawable->draw_lines(gc, Glib::ArrayHandle<Gdk::Point>(points));
 238                         gc->set_rgb_fg_color(DUCK_COLOR_BEZIER_2);
 239                         gc->set_line_attributes(1,Gdk::LINE_ON_OFF_DASH,Gdk::CAP_BUTT,Gdk::JOIN_MITER);
 240                         drawable->draw_lines(gc, Glib::ArrayHandle<Gdk::Point>(points));
 241
 242                 }
 243         }
 244
 245
 246         const DuckList duck_list(get_work_area()->get_duck_list());
 247         //Gtk::StateType state = Gtk::STATE_ACTIVE;
 248         Gtk::ShadowType shadow=Gtk::SHADOW_OUT;
 249         std::list<ScreenDuck> screen_duck_list;
 250         const float radius((abs(pw)+abs(ph))*4);
 251
 252         etl::handle<Duck> hover_duck(get_work_area()->find_duck(get_work_area()->get_cursor_pos(),radius, get_work_area()->get_type_mask()));
 253
 254         // Render the ducks
 255         for(std::list<handle<Duck> >::const_iterator iter=duck_list.begin();iter!=duck_list.end();++iter)
 256         {
 257
 258                 // If this type of duck has been masked, then skip it
 259                 if((*iter)->get_type() && (!(get_work_area()->get_type_mask() & (*iter)->get_type())))
 260                         continue;
 261
 262 //              Real x,y;
 263         //      Gdk::Rectangle area;
 264                 Point sub_trans_point((*iter)->get_sub_trans_point());
 265                 Point sub_trans_origin((*iter)->get_sub_trans_origin());
 266                 etl::handle<Duck> origin_duck = (*iter)->get_origin_duck();
 267
 268                 bool has_connect(false);
 269                 if((*iter)->get_tangent() || (*iter)->get_type()&Duck::TYPE_ANGLE)
 270                 {
 271                         has_connect=true;
 272                 }
 273                 if((*iter)->get_connect_duck())
 274                 {
 275                         has_connect=true;
 276                         sub_trans_origin = (*iter)->get_connect_duck()->get_sub_trans_point();
 277                         origin_duck = (*iter)->get_connect_duck();
 278                 }
 279
 280
 281                 if (App::restrict_radius_ducks &&
 282                         (*iter)->is_radius())
 283                 {
 284                         if (sub_trans_point[0] < sub_trans_origin[0])
 285                                 sub_trans_point[0] = sub_trans_origin[0];
 286                         if (sub_trans_point[1] < sub_trans_origin[1])
 287                                 sub_trans_point[1] = sub_trans_origin[1];
 288                 }
 289
 290                 WorkArea* w_area = get_work_area();
 291                 restrict_blinevertex_duck((*iter), *w_area, &sub_trans_point);
 292                 if(origin_duck)
 293                         restrict_blinevertex_duck(origin_duck, *w_area, &sub_trans_origin);
 294
 295                 Point point((*iter)->get_transform_stack().perform(sub_trans_point));
 296                 Point origin((*iter)->get_transform_stack().perform(sub_trans_origin));
 297
 298                 point[0]=(point[0]-window_startx)/pw;
 299                 point[1]=(point[1]-window_starty)/ph;
 300
 301                 origin[0]=(origin[0]-window_startx)/pw;
 302                 origin[1]=(origin[1]-window_starty)/ph;
 303
 304                 bool selected(get_work_area()->duck_is_selected(*iter));
 305                 bool hover(*iter==hover_duck || (*iter)->get_hover());
 306
 307                 shadow = selected?Gtk::SHADOW_IN:Gtk::SHADOW_OUT;
 308
 309                 if(get_work_area()->get_selected_value_node())
 310                 {
 311                         synfigapp::ValueDesc value_desc((*iter)->get_value_desc());
 312                         if(value_desc.is_valid() && value_desc.is_value_node() && get_work_area()->get_selected_value_node()==value_desc.get_value_node())
 313                         {
 314                                 gc->set_function(Gdk::COPY);
 315                                 gc->set_rgb_fg_color(DUCK_COLOR_SELECTED);
 316                                 //gc->set_line_attributes(1,Gdk::LINE_ON_OFF_DASH,Gdk::CAP_BUTT,Gdk::JOIN_MITER);
 317                                 gc->set_line_attributes(2,Gdk::LINE_SOLID,Gdk::CAP_BUTT,Gdk::JOIN_MITER);
 318
 319                                 drawable->draw_rectangle(gc,false,
 320                                         round_to_int(point[0]-5),
 321                                         round_to_int(point[1]-5),
 322                                         10,
 323                                         10
 324                                 );
 325                         }
 326
 327                 }
 328
 329                 if((*iter)->get_box_duck())
 330                 {
 331                         Point boxpoint((*iter)->get_box_duck()->get_trans_point());
 332                         boxpoint[0]=(boxpoint[0]-window_startx)/pw;
 333                         boxpoint[1]=(boxpoint[1]-window_starty)/ph;
 334                         Point tl(min(point[0],boxpoint[0]),min(point[1],boxpoint[1]));
 335
 336                         gc->set_function(Gdk::COPY);
 337                         gc->set_rgb_fg_color(DUCK_COLOR_BOX_1);
 338                         gc->set_line_attributes(1,Gdk::LINE_SOLID,Gdk::CAP_BUTT,Gdk::JOIN_MITER);
 339                         drawable->draw_rectangle(gc,false,
 340                                 round_to_int(tl[0]),
 341                                 round_to_int(tl[1]),
 342                                 round_to_int(abs(boxpoint[0]-point[0])),
 343                                 round_to_int(abs(boxpoint[1]-point[1]))
 344                         );
 345                         gc->set_function(Gdk::COPY);
 346                         gc->set_rgb_fg_color(DUCK_COLOR_BOX_2);
 347                         gc->set_line_attributes(1,Gdk::LINE_ON_OFF_DASH,Gdk::CAP_BUTT,Gdk::JOIN_MITER);
 348                         drawable->draw_rectangle(gc,false,
 349                                 round_to_int(tl[0]),
 350                                 round_to_int(tl[1]),
 351                                 round_to_int(abs(boxpoint[0]-point[0])),
 352                                 round_to_int(abs(boxpoint[1]-point[1]))
 353                         );
 354                 }
 355
 356                 ScreenDuck screen_duck;
 357                 screen_duck.pos=point;
 358                 screen_duck.selected=selected;
 359                 screen_duck.hover=hover;
 360
 361                 if(!(*iter)->get_editable())
 362                         screen_duck.color=(DUCK_COLOR_NOT_EDITABLE);
 363                 else if((*iter)->get_tangent())
 364                         screen_duck.color=((*iter)->get_scalar()<0 ? DUCK_COLOR_TANGENT_1 : DUCK_COLOR_TANGENT_2);
 365                 else if((*iter)->get_type()&Duck::TYPE_VERTEX)
 366                         screen_duck.color=DUCK_COLOR_VERTEX;
 367                 else if((*iter)->get_type()&Duck::TYPE_RADIUS)
 368                         screen_duck.color=DUCK_COLOR_RADIUS;
 369                 else if((*iter)->get_type()&Duck::TYPE_WIDTH)
 370                         screen_duck.color=DUCK_COLOR_WIDTH;
 371                 else if((*iter)->get_type()&Duck::TYPE_ANGLE)
 372                         screen_duck.color=(DUCK_COLOR_ANGLE);
 373                 else
 374                         screen_duck.color=DUCK_COLOR_OTHER;
 375
 376                 screen_duck_list.push_front(screen_duck);
 377
 378                 if(has_connect)
 379                 {
 380                         if(solid_lines)
 381                         {
 382                                 gc->set_line_attributes(3,Gdk::LINE_SOLID,Gdk::CAP_BUTT,Gdk::JOIN_MITER);
 383                                 gc->set_rgb_fg_color(DUCK_COLOR_CONNECT_OUTSIDE);
 384                                 gc->set_function(Gdk::COPY);
 385                                 drawable->draw_line(gc, (int)origin[0],(int)origin[1],(int)(point[0]),(int)(point[1]));
 386                                 gc->set_line_attributes(1,Gdk::LINE_SOLID,Gdk::CAP_BUTT,Gdk::JOIN_MITER);
 387                                 gc->set_rgb_fg_color(DUCK_COLOR_CONNECT_INSIDE);
 388                                 drawable->draw_line(gc, (int)origin[0],(int)origin[1],(int)(point[0]),(int)(point[1]));
 389                         }
 390                         else
 391                         {
 392 //                              gc->set_rgb_fg_color(Gdk::Color("#ffffff"));
 393 //                              gc->set_function(Gdk::INVERT);
 394 //                              drawable->draw_line(gc, (int)origin[0],(int)origin[1],(int)(point[0]),(int)(point[1]));
 395                                 gc->set_line_attributes(1,Gdk::LINE_SOLID,Gdk::CAP_BUTT,Gdk::JOIN_MITER);
 396                                 gc->set_rgb_fg_color(DUCK_COLOR_CONNECT_OUTSIDE);
 397                                 gc->set_function(Gdk::COPY);
 398                                 drawable->draw_line(gc, (int)origin[0],(int)origin[1],(int)(point[0]),(int)(point[1]));
 399                                 gc->set_line_attributes(1,Gdk::LINE_ON_OFF_DASH,Gdk::CAP_BUTT,Gdk::JOIN_MITER);
 400                                 gc->set_rgb_fg_color(DUCK_COLOR_CONNECT_INSIDE);
 401                                 drawable->draw_line(gc, (int)origin[0],(int)origin[1],(int)(point[0]),(int)(point[1]));
 402                         }
 403                 }
 404
 405                 if((*iter)->is_radius())
 406                 {
 407                         const Real mag((point-origin).mag());
 408                         const int d(round_to_int(mag*2));
 409                         const int x(round_to_int(origin[0]-mag));
 410                         const int y(round_to_int(origin[1]-mag));
 411
 412                         if(solid_lines)
 413                         {
 414                                 gc->set_rgb_fg_color(Gdk::Color("#000000"));
 415                                 gc->set_function(Gdk::COPY);
 416                                 gc->set_line_attributes(3,Gdk::LINE_SOLID,Gdk::CAP_BUTT,Gdk::JOIN_MITER);
 417                                 drawable->draw_arc(
 418                                         gc,
 419                                         false,
 420                                         x,
 421                                         y,
 422                                         d,
 423                                         d,
 424                                         0,
 425                                         360*64
 426                                 );
 427                                 gc->set_rgb_fg_color(Gdk::Color("#afafaf"));
 428                         }
 429                         else
 430                         {
 431                                 gc->set_rgb_fg_color(Gdk::Color("#ffffff"));
 432                                 gc->set_function(Gdk::INVERT);
 433                         }
 434                         gc->set_line_attributes(1,Gdk::LINE_SOLID,Gdk::CAP_BUTT,Gdk::JOIN_MITER);
 435
 436                         drawable->draw_arc(
 437                                 gc,
 438                                 false,
 439                                 x,
 440                                 y,
 441                                 d,
 442                                 d,
 443                                 0,
 444                                 360*64
 445                         );
 446
 447                         if(hover)
 448                         {
 449                                 Real mag;
 450                                 if (App::restrict_radius_ducks)
 451                                 {
 452                                         Point sub_trans_point((*iter)->get_sub_trans_point());
 453                                         Point sub_trans_origin((*iter)->get_sub_trans_origin());
 454
 455                                         if (sub_trans_point[0] < sub_trans_origin[0])
 456                                                 sub_trans_point[0] = sub_trans_origin[0];
 457                                         if (sub_trans_point[1] < sub_trans_origin[1])
 458                                                 sub_trans_point[1] = sub_trans_origin[1];
 459
 460                                         Point point((*iter)->get_transform_stack().perform(sub_trans_point));
 461                                         Point origin((*iter)->get_transform_stack().perform(sub_trans_origin));
 462
 463                                         mag = (point-origin).mag();
 464                                 }
 465                                 else
 466                                         mag = ((*iter)->get_trans_point()-(*iter)->get_trans_origin()).mag();
 467
 468                                 Distance real_mag(mag, Distance::SYSTEM_UNITS);
 469                                 real_mag.convert(App::distance_system,get_work_area()->get_rend_desc());
 470                                 layout->set_text(real_mag.get_string());
 471
 472                                 gc->set_rgb_fg_color(DUCK_COLOR_WIDTH_TEXT_1);
 473                                 drawable->draw_layout(
 474                                         gc,
 475                                         round_to_int(point[0])+1+6,
 476                                         round_to_int(point[1])+1-8,
 477                                         layout
 478                                 );
 479                                 gc->set_rgb_fg_color(DUCK_COLOR_WIDTH_TEXT_2);
 480                                 drawable->draw_layout(
 481                                         gc,
 482                                         round_to_int(point[0])+6,
 483                                         round_to_int(point[1])-8,
 484                                         layout
 485                                 );
 486                         }
 487
 488                 }
 489
 490         }
 491
 492
 493         for(;screen_duck_list.size();screen_duck_list.pop_front())
 494         {
 495                 int radius=4;
 496                 int outline=1;
 497                 Gdk::Color color(screen_duck_list.front().color);
 498
 499                 if(!screen_duck_list.front().selected)
 500                 {
 501                         color.set_red(color.get_red()*2/3);
 502                         color.set_green(color.get_green()*2/3);
 503                         color.set_blue(color.get_blue()*2/3);
 504                 }
 505
 506                 if(screen_duck_list.front().hover && !screen_duck_list.back().hover && screen_duck_list.size()>1)
 507                 {
 508                         screen_duck_list.push_back(screen_duck_list.front());
 509                         continue;
 510                 }
 511
 512                 if(screen_duck_list.front().hover)
 513                 {
 514                         radius+=2;
 515                         outline++;
 516                 }
 517
 518                 gc->set_function(Gdk::COPY);
 519                 gc->set_line_attributes(1,Gdk::LINE_SOLID,Gdk::CAP_BUTT,Gdk::JOIN_MITER);
 520                 gc->set_rgb_fg_color(DUCK_COLOR_OUTLINE);
 521                 drawable->draw_arc(
 522                         gc,
 523                         true,
 524                         round_to_int(screen_duck_list.front().pos[0]-radius),
 525                         round_to_int(screen_duck_list.front().pos[1]-radius),
 526                         radius*2,
 527                         radius*2,
 528                         0,
 529                         360*64
 530                 );
 531
 532
 533                 gc->set_rgb_fg_color(color);
 534
 535                 drawable->draw_arc(
 536                         gc,
 537                         true,
 538                         round_to_int(screen_duck_list.front().pos[0]-radius+outline),
 539                         round_to_int(screen_duck_list.front().pos[1]-radius+outline),
 540                         radius*2-outline*2,
 541                         radius*2-outline*2,
 542                         0,
 543                         360*64
 544                 );
 545         }
 546 }