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   1 /* === S Y N F I G ========================================================= */
   2 /*!     \file widget_coloredit.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 Chris Moore
  10 **  Copyright (c) 2008 Paul Wise
  11 **
  12 **      This package is free software; you can redistribute it and/or
  13 **      modify it under the terms of the GNU General Public License as
  14 **      published by the Free Software Foundation; either version 2 of
  15 **      the License, or (at your option) any later version.
  16 **
  17 **      This package is distributed in the hope that it will be useful,
  18 **      but WITHOUT ANY WARRANTY; without even the implied warranty of
  19 **      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  20 **      General Public License for more details.
  21 **      \endlegal
  22 */
  23 /* ========================================================================= */
  24
  25 /* === H E A D E R S ======================================================= */
  26
  27 #ifdef USING_PCH
  28 #       include "pch.h"
  29 #else
  30 #ifdef HAVE_CONFIG_H
  31 #       include <config.h>
  32 #endif
  33
  34 #include "widget_coloredit.h"
  35 #include <cmath>
  36 #include "app.h"
  37 #include <gtkmm/drawingarea.h>
  38 #include <pangomm/attributes.h>
  39 #include <pangomm/attrlist.h>
  40 #include <algorithm>
  41 #include <gtkmm/notebook.h>
  42 #include <gtkmm/box.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 #define SPINBUTTON_WIDTH 100
  58
  59 /* === G L O B A L S ======================================================= */
  60
  61 /* === P R O C E D U R E S ================================================= */
  62
  63 /* === C L A S S E S ======================================================= */
  64
  65 ColorSlider::ColorSlider(const ColorSlider::Type &x):
  66         type(x)
  67 {
  68         signal_expose_event().connect(sigc::mem_fun(*this, &ColorSlider::redraw));
  69         set_size_request(-1,12);
  70         add_events(Gdk::BUTTON_PRESS_MASK | Gdk::BUTTON_RELEASE_MASK);
  71         add_events(Gdk::BUTTON1_MOTION_MASK);
  72 }
  73
  74 void
  75 ColorSlider::set_type(Type x) { type=x; queue_draw(); }
  76
  77 void
  78 ColorSlider::set_color(synfig::Color x) { color_=x; queue_draw(); }
  79
  80 void
  81 ColorSlider::slider_color_TYPE_R(synfig::Color &color, float amount) { color.set_r(amount); }
  82 void
  83 ColorSlider::slider_color_TYPE_G(synfig::Color &color, float amount) { color.set_g(amount); }
  84 void
  85 ColorSlider::slider_color_TYPE_B(synfig::Color &color, float amount) { color.set_b(amount); }
  86 void
  87 ColorSlider::slider_color_TYPE_Y(synfig::Color &color, float amount) { color.set_y(amount); }
  88 void
  89 ColorSlider::slider_color_TYPE_U(synfig::Color &color, float amount) { color.set_u(amount-0.5f); }
  90 void
  91 ColorSlider::slider_color_TYPE_V(synfig::Color &color, float amount) { color.set_v(amount-0.5f); }
  92 void
  93 ColorSlider::slider_color_TYPE_HUE(synfig::Color &color, float amount) { color.set_uv_angle(Angle::rot(amount)); }
  94 void
  95 ColorSlider::slider_color_TYPE_SAT(synfig::Color &color, float amount) { color.set_s(amount*0.5f); }
  96 void
  97 ColorSlider::slider_color_TYPE_A(synfig::Color &color, float amount) { color.set_a(amount); }
  98
  99 void
 100 ColorSlider::adjust_color(Type type, synfig::Color &color, float amount)
 101 {
 102         static const slider_color_func jump_table[int(TYPE_END)] =
 103         {
 104                 slider_color_TYPE_R,
 105                 slider_color_TYPE_G,
 106                 slider_color_TYPE_B,
 107                 slider_color_TYPE_Y,
 108                 slider_color_TYPE_U,
 109                 slider_color_TYPE_V,
 110                 slider_color_TYPE_HUE,
 111                 slider_color_TYPE_SAT,
 112                 slider_color_TYPE_A,
 113         };
 114         jump_table[int(type)](color,amount);
 115 }
 116
 117 bool
 118 ColorSlider::redraw(GdkEventExpose */*bleh*/)
 119 {
 120         Color color(color_);
 121
 122         static const slider_color_func jump_table[int(TYPE_END)] =
 123         {
 124                 slider_color_TYPE_R,
 125                 slider_color_TYPE_G,
 126                 slider_color_TYPE_B,
 127                 slider_color_TYPE_Y,
 128                 slider_color_TYPE_U,
 129                 slider_color_TYPE_V,
 130                 slider_color_TYPE_HUE,
 131                 slider_color_TYPE_SAT,
 132                 slider_color_TYPE_A,
 133         };
 134
 135         slider_color_func color_func(jump_table[int(type)]);
 136
 137         float amount;
 138         switch(type)
 139         {
 140                 case TYPE_R: amount=color.get_r(); break;
 141                 case TYPE_G: amount=color.get_g(); break;
 142                 case TYPE_B: amount=color.get_b(); break;
 143                 case TYPE_Y: amount=color.get_y(); break;
 144                 case TYPE_U: amount=color.get_u()+0.5; break;
 145                 case TYPE_V: amount=color.get_v()+0.5; break;
 146                 case TYPE_HUE: amount=Angle::rot(color.get_uv_angle()).get(); amount-=floor(amount); break;
 147                 case TYPE_SAT: amount=color.get_s()*2.0; break;
 148                 case TYPE_A: amount=color.get_a(); break;
 149                 default: amount=0; break;
 150         }
 151         if(use_colorspace_gamma() && (type<TYPE_U))
 152                 amount=gamma_in(amount);
 153
 154         const int height(get_height());
 155         const int width(get_width());
 156
 157         Gdk::Rectangle ca(0,0,width,height);
 158
 159         Glib::RefPtr<Gdk::GC> gc(Gdk::GC::create(get_window()));
 160         const Color bg1(0.75, 0.75, 0.75);
 161         const Color bg2(0.5, 0.5, 0.5);
 162         int i;
 163         for(i=width-1;i>=0;i--)
 164         {
 165                 color_func(color,
 166                                    (use_colorspace_gamma() && type<TYPE_U)
 167                                    ? gamma_out(float(i)/float(width))
 168                                    :              (float(i)/float(width)));
 169                 const Color c1(Color::blend(color,bg1,1.0).clamped());
 170                 const Color c2(Color::blend(color,bg2,1.0).clamped());
 171                 assert(c1.is_valid());
 172                 assert(c2.is_valid());
 173
 174                 if((i*2/height)&1)
 175                 {
 176                         gc->set_rgb_fg_color(colorconv_synfig2gdk(c1));
 177                         get_window()->draw_rectangle(gc, true, ca.get_x()+i, ca.get_y(), 1, height/2);
 178
 179                         gc->set_rgb_fg_color(colorconv_synfig2gdk(c2));
 180                         get_window()->draw_rectangle(gc, true, ca.get_x()+i, ca.get_y()+height/2, 1, height/2);
 181                 }
 182                 else
 183                 {
 184                         gc->set_rgb_fg_color(colorconv_synfig2gdk(c2));
 185                         get_window()->draw_rectangle(gc, true, ca.get_x()+i, ca.get_y(), 1, height/2);
 186
 187                         gc->set_rgb_fg_color(colorconv_synfig2gdk(c1));
 188                         get_window()->draw_rectangle(gc, true, ca.get_x()+i, ca.get_y()+height/2, 1, height/2);
 189                 }
 190         }
 191
 192         get_style()->paint_arrow(
 193                 get_window(),
 194                 Gtk::STATE_SELECTED,
 195                 Gtk::SHADOW_OUT,
 196                 ca,
 197                 *this,
 198                 " ",
 199                 Gtk::ARROW_UP,
 200                 1,
 201                 int(amount*width)-height/2,
 202                 0,
 203                 height,
 204                 height
 205         );
 206
 207         gc->set_rgb_fg_color(Gdk::Color("#ffffff"));
 208         get_window()->draw_rectangle(gc, false, ca.get_x()+1, ca.get_y()+1, width-3, height-3);
 209         gc->set_rgb_fg_color(Gdk::Color("#000000"));
 210         get_window()->draw_rectangle(gc, false, ca.get_x(), ca.get_y(), width-1, height-1);
 211         return true;
 212 }
 213
 214 bool
 215 ColorSlider::on_event(GdkEvent *event)
 216 {
 217         const int width(get_width());
 218         float x = 0;
 219         if( GDK_SCROLL == event->type ){
 220                 Color color(color_);
 221                 float amount;
 222                 switch(type)
 223                 {
 224                         case TYPE_R: amount=color.get_r(); break;
 225                         case TYPE_G: amount=color.get_g(); break;
 226                         case TYPE_B: amount=color.get_b(); break;
 227                         case TYPE_Y: amount=color.get_y(); break;
 228                         case TYPE_U: amount=color.get_u()+0.5; break;
 229                         case TYPE_V: amount=color.get_v()+0.5; break;
 230                         case TYPE_HUE: amount=Angle::rot(color.get_uv_angle()).get(); amount-=floor(amount); break;
 231                         case TYPE_SAT: amount=color.get_s()*2.0; break;
 232                         case TYPE_A: amount=color.get_a(); break;
 233                         default: amount=0; break;
 234                 }
 235                 if(use_colorspace_gamma() && (type<TYPE_U))
 236                         amount=gamma_in(amount);
 237                 x = amount*width;
 238                 switch(event->scroll.direction){
 239                         case GDK_SCROLL_UP:
 240                         case GDK_SCROLL_RIGHT:
 241                                 x+=1.0;
 242                                 break;
 243                         case GDK_SCROLL_DOWN:
 244                         case GDK_SCROLL_LEFT:
 245                                 x-=1.0;
 246                                 break;
 247                 }
 248         } else {
 249                 x = float(event->button.x);
 250         }
 251
 252         float pos(x/width);
 253         if(pos<0 || x<=0)pos=0;
 254         if(pos>1)pos=1;
 255
 256         if(use_colorspace_gamma() && (type<TYPE_U))
 257                 pos=gamma_out(pos);
 258         if(pos<0 || event->button.x<=0)pos=0;
 259         if(pos>1)pos=1;
 260
 261         switch(event->type)
 262         {
 263         case GDK_SCROLL:
 264                 signal_slider_moved_(type,pos);
 265                 queue_draw();
 266                 signal_activated_();
 267                 return true;
 268
 269         case GDK_BUTTON_RELEASE:
 270                 signal_activated_();
 271                 return true;
 272
 273         case GDK_BUTTON_PRESS:
 274         case GDK_MOTION_NOTIFY:
 275 //              adjust_color(type,color_,pos);
 276                 signal_slider_moved_(type,pos);
 277                 queue_draw();
 278                 return true;
 279                 break;
 280         default:
 281                 break;
 282         }
 283         return false;
 284 }
 285
 286 /* === M E T H O D S ======================================================= */
 287
 288 Widget_ColorEdit::Widget_ColorEdit():
 289         R_adjustment(0,-10000000,10000000,1,10,0),
 290         G_adjustment(0,-10000000,10000000,1,10,0),
 291         B_adjustment(0,-10000000,10000000,1,10,0),
 292         A_adjustment(0,-10000000,10000000,1,10,0)
 293 {
 294         notebook=manage(new Gtk::Notebook);
 295
 296         Gtk::Table* rgb_table(manage(new Gtk::Table()));
 297         Gtk::Table* yuv_table(manage(new Gtk::Table()));
 298         Gtk::Table* main_table(this);
 299
 300         {
 301                 Gtk::VBox* rgb_box(manage(new Gtk::VBox()));
 302                 Gtk::VBox* yuv_box(manage(new Gtk::VBox()));
 303                 rgb_box->pack_start(*rgb_table,false,false);
 304                 yuv_box->pack_start(*yuv_table,false,false);
 305                 notebook->append_page(*rgb_box,_("RGB"));
 306                 notebook->append_page(*yuv_box,_("YUV"));
 307         }
 308
 309         color=Color(0,0,0,0);
 310
 311         set_size_request(200,-1);
 312         hold_signals=true;
 313
 314         Gtk::Label *label;
 315
 316         R_adjustment.set_lower(-10000000);
 317         G_adjustment.set_lower(-10000000);
 318         B_adjustment.set_lower(-10000000);
 319         A_adjustment.set_lower(-10000000);
 320
 321         clamp_=true;
 322
 323         Pango::AttrList attr_list;
 324         Pango::AttrInt pango_size(Pango::Attribute::create_attr_size(Pango::SCALE*7));
 325         pango_size.set_start_index(0);
 326         pango_size.set_end_index(64);
 327         attr_list.change(pango_size);
 328
 329         widget_color.set_size_request(-1,16);
 330         attach(widget_color, 0, 2, 0, 1, Gtk::EXPAND|Gtk::FILL, Gtk::EXPAND|Gtk::FILL, 0, 0);
 331         attach(*notebook, 0, 2, 1, 2, Gtk::EXPAND|Gtk::FILL, Gtk::EXPAND|Gtk::FILL, 0, 0);
 332
 333 #define SLIDER_ROW(i,n,l) \
 334         slider_##n=manage(new ColorSlider(ColorSlider::TYPE_##n));      \
 335         slider_##n->signal_slider_moved().connect(sigc::mem_fun(*this,&studio::Widget_ColorEdit::on_slider_moved)); \
 336         /*slider_##n->signal_activated().connect(sigc::mem_fun(*this,&studio::Widget_ColorEdit::activated));*/ \
 337         slider_##n->signal_activated().connect(sigc::mem_fun(*this,&studio::Widget_ColorEdit::on_value_changed)); \
 338         label=manage(new class Gtk::Label(l,0.0,0.5)); \
 339         label->set_use_markup(false); \
 340         label->set_use_underline(false); \
 341         label->set_attributes(attr_list); \
 342         table->attach(*label, 0, 1, 1+2*i, 2+2*i, Gtk::EXPAND|Gtk::FILL, Gtk::EXPAND|Gtk::FILL, 0, 0);  \
 343         table->attach(*slider_##n, 0, 1, 2+2*i, 3+2*i, Gtk::EXPAND|Gtk::FILL, Gtk::EXPAND|Gtk::FILL, 0, 0)
 344
 345 #define ATTACH_SPIN_BUTTON(i,n) \
 346         spinbutton_##n=manage(new class Gtk::SpinButton(n##_adjustment,1,0)); \
 347         spinbutton_##n->set_update_policy(Gtk::UPDATE_ALWAYS); \
 348         spinbutton_##n->set_size_request(SPINBUTTON_WIDTH,-1); \
 349         spinbutton_##n->show(); \
 350         table->attach(*spinbutton_##n, 1, 2, 1+2*i, 3+2*i, Gtk::SHRINK, Gtk::EXPAND, 2, 0)
 351
 352         {
 353                 Gtk::Table* table(rgb_table);
 354                 SLIDER_ROW(0,R,_("Red"));
 355                 ATTACH_SPIN_BUTTON(0,R);
 356                 SLIDER_ROW(1,G,_("Green"));
 357                 ATTACH_SPIN_BUTTON(1,G);
 358                 SLIDER_ROW(2,B,_("Blue"));
 359                 ATTACH_SPIN_BUTTON(2,B);
 360
 361                 hex_color_label = manage(new Gtk::Label(_("HTML code"), 0.0, 0.5));
 362                 hex_color_label->set_use_markup(false);
 363                 hex_color_label->set_use_underline(false);
 364                 hex_color_label->set_attributes(attr_list);
 365                 table->attach(*hex_color_label, 0, 1, 7, 8, Gtk::SHRINK, Gtk::SHRINK, 0, 0);
 366
 367                 hex_color = manage(new Gtk::Entry());
 368                 hex_color->set_width_chars(8);
 369                 hex_color->signal_activate().connect(sigc::mem_fun(*this,&studio::Widget_ColorEdit::on_hex_edited));
 370                 table->attach(*hex_color, 0, 1, 8, 9, Gtk::SHRINK, Gtk::SHRINK, 0, 0);
 371         }
 372         {
 373                 Gtk::Table* table(yuv_table);
 374                 SLIDER_ROW(0,Y,_("Luma"));
 375                 SLIDER_ROW(1,HUE,_("Hue"));
 376                 SLIDER_ROW(2,SAT,_("Saturation"));
 377                 SLIDER_ROW(3,U,_("U"));
 378                 SLIDER_ROW(4,V,_("V"));
 379         }
 380         {
 381                 Gtk::Table* table(main_table);
 382                 SLIDER_ROW(1,A,_("Alpha"));
 383                 ATTACH_SPIN_BUTTON(1,A);
 384         }
 385
 386 #undef SLIDER_ROW
 387 #undef ATTACH_SPIN_BUTTON
 388
 389         spinbutton_R->signal_activate().connect(sigc::mem_fun(*spinbutton_G,&Gtk::SpinButton::grab_focus));
 390         spinbutton_G->signal_activate().connect(sigc::mem_fun(*spinbutton_B,&Gtk::SpinButton::grab_focus));
 391         spinbutton_B->signal_activate().connect(sigc::mem_fun(*spinbutton_A,&Gtk::SpinButton::grab_focus));
 392         spinbutton_A->signal_activate().connect(sigc::mem_fun(*spinbutton_R,&Gtk::SpinButton::grab_focus));
 393
 394         R_adjustment.signal_value_changed().connect(sigc::mem_fun(*this,&studio::Widget_ColorEdit::on_value_changed));
 395         G_adjustment.signal_value_changed().connect(sigc::mem_fun(*this,&studio::Widget_ColorEdit::on_value_changed));
 396         B_adjustment.signal_value_changed().connect(sigc::mem_fun(*this,&studio::Widget_ColorEdit::on_value_changed));
 397         A_adjustment.signal_value_changed().connect(sigc::mem_fun(*this,&studio::Widget_ColorEdit::on_value_changed));
 398
 399         show_all_children();
 400
 401         set_digits(1);
 402         set_value(color);
 403
 404         hold_signals=false;
 405 }
 406
 407 Widget_ColorEdit::~Widget_ColorEdit()
 408 {
 409 }
 410
 411 void
 412 Widget_ColorEdit::on_slider_moved(ColorSlider::Type type, float amount)
 413 {
 414         Color color(get_value_raw());
 415
 416         assert(color.is_valid());
 417         ColorSlider::adjust_color(type,color,amount);
 418         assert(color.is_valid());
 419
 420         // If a non-primary colorslider is adjusted,
 421         // we want to make sure that we clamp
 422         if(type>ColorSlider::TYPE_B && (color.get_r()<0 ||color.get_g()<0 ||color.get_b()<0))
 423                 clamp_=true;
 424
 425         /*
 426         if(type==ColorSlider::TYPE_R && color.get_r()<0)clamp_=false;
 427         if(type==ColorSlider::TYPE_G && color.get_g()<0)clamp_=false;
 428         if(type==ColorSlider::TYPE_B && color.get_b()<0)clamp_=false;
 429         */
 430         clamp_=false;
 431
 432         set_value(color);
 433         assert(color.is_valid());
 434 }
 435
 436 void
 437 Widget_ColorEdit::on_hex_edited()
 438 {
 439         Color color(get_value_raw());
 440         String s = hex_color->get_text();
 441         color.set_hex(s);
 442         set_value(color);
 443         signal_value_changed_();
 444 }
 445
 446 void
 447 Widget_ColorEdit::on_value_changed()
 448 {
 449         if(hold_signals)
 450                 return;
 451
 452         const Color color(get_value_raw());
 453         assert(color.is_valid());
 454         slider_R->set_color(color);
 455         slider_G->set_color(color);
 456         slider_B->set_color(color);
 457         slider_Y->set_color(color);
 458         slider_U->set_color(color);
 459         slider_V->set_color(color);
 460         slider_HUE->set_color(color);
 461         slider_SAT->set_color(color);
 462         slider_A->set_color(color);
 463         hex_color->set_text(color.get_hex());
 464         widget_color.set_value(color);
 465
 466         activate();
 467         signal_value_changed_();
 468 }
 469
 470 void
 471 Widget_ColorEdit::set_has_frame(bool x)
 472 {
 473         spinbutton_R->set_has_frame(x);
 474         spinbutton_G->set_has_frame(x);
 475         spinbutton_B->set_has_frame(x);
 476         spinbutton_A->set_has_frame(x);
 477         spinbutton_R->set_size_request(SPINBUTTON_WIDTH,-1);
 478         spinbutton_G->set_size_request(SPINBUTTON_WIDTH,-1);
 479         spinbutton_B->set_size_request(SPINBUTTON_WIDTH,-1);
 480         spinbutton_A->set_size_request(SPINBUTTON_WIDTH,-1);
 481 }
 482
 483 void
 484 Widget_ColorEdit::set_digits(int x)
 485 {
 486         spinbutton_R->set_digits(x);
 487         spinbutton_G->set_digits(x);
 488         spinbutton_B->set_digits(x);
 489         spinbutton_A->set_digits(x);
 490         spinbutton_R->set_size_request(SPINBUTTON_WIDTH,-1);
 491         spinbutton_G->set_size_request(SPINBUTTON_WIDTH,-1);
 492         spinbutton_B->set_size_request(SPINBUTTON_WIDTH,-1);
 493         spinbutton_A->set_size_request(SPINBUTTON_WIDTH,-1);
 494 }
 495
 496 void
 497 Widget_ColorEdit::set_value(const synfig::Color &data)
 498 {
 499         assert(data.is_valid());
 500         hold_signals=true;
 501         clamp_=false;
 502
 503         color=data;
 504
 505         if(use_colorspace_gamma())
 506         {
 507                 R_adjustment.set_value(gamma_in(color.get_r())*100);
 508                 G_adjustment.set_value(gamma_in(color.get_g())*100);
 509                 B_adjustment.set_value(gamma_in(color.get_b())*100);
 510         }
 511         else
 512         {
 513                 R_adjustment.set_value(color.get_r()*100);
 514                 G_adjustment.set_value(color.get_g()*100);
 515                 B_adjustment.set_value(color.get_b()*100);
 516         }
 517         A_adjustment.set_value(color.get_a()*100);
 518
 519         slider_R->set_color(color);
 520         slider_G->set_color(color);
 521         slider_B->set_color(color);
 522         slider_Y->set_color(color);
 523         slider_U->set_color(color);
 524         slider_V->set_color(color);
 525         slider_HUE->set_color(color);
 526         slider_SAT->set_color(color);
 527         slider_A->set_color(color);
 528         hex_color->set_text(color.get_hex());
 529         widget_color.set_value(color);
 530
 531         hold_signals=false;
 532 }
 533
 534 synfig::Color
 535 Widget_ColorEdit::get_value_raw()
 536 {
 537         Color color;
 538         if(use_colorspace_gamma())
 539         {
 540                 color.set_r(gamma_out(R_adjustment.get_value()/100.0f));
 541                 color.set_g(gamma_out(G_adjustment.get_value()/100.0f));
 542                 color.set_b(gamma_out(B_adjustment.get_value()/100.0f));
 543         }
 544         else
 545         {
 546                 color.set_r(R_adjustment.get_value()/100);
 547                 color.set_g(G_adjustment.get_value()/100);
 548                 color.set_b(B_adjustment.get_value()/100);
 549         }
 550         color.set_a(A_adjustment.get_value()/100);
 551         assert(color.is_valid());
 552
 553         return color;
 554 }
 555
 556 const synfig::Color &
 557 Widget_ColorEdit::get_value()
 558 {
 559         if(use_colorspace_gamma())
 560         {
 561                 color.set_r(gamma_out(R_adjustment.get_value()/100.0f));
 562                 color.set_g(gamma_out(G_adjustment.get_value()/100.0f));
 563                 color.set_b(gamma_out(B_adjustment.get_value()/100.0f));
 564                 assert(color.is_valid());
 565         }
 566         else
 567         {
 568                 color.set_r(R_adjustment.get_value()/100);
 569                 color.set_g(G_adjustment.get_value()/100);
 570                 color.set_b(B_adjustment.get_value()/100);
 571                 assert(color.is_valid());
 572         }
 573         color.set_a(A_adjustment.get_value()/100);
 574         assert(color.is_valid());
 575
 576         if(notebook->get_current_page()!=0)
 577                 color=color.clamped();
 578
 579         /*{
 580                 // Clamp out negative values
 581                 color.set_r(std::max(0.0f,(float)color.get_r()));
 582                 color.set_g(std::max(0.0f,(float)color.get_g()));
 583                 color.set_b(std::max(0.0f,(float)color.get_b()));
 584         }*/
 585
 586         return color;
 587 }