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

   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 **
  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 "widget_coloredit.h"
  34 #include <cmath>
  35 #include "app.h"
  36 #include <gtkmm/drawingarea.h>
  37 #include <pangomm/attributes.h>
  38 #include <pangomm/attrlist.h>
  39 #include <algorithm>
  40 #include <gtkmm/notebook.h>
  41 #include <gtkmm/box.h>
  42
  43 #include "general.h"
  44
  45 #endif
  46
  47 /* === U S I N G =========================================================== */
  48
  49 using namespace std;
  50 using namespace etl;
  51 using namespace synfig;
  52 using namespace studio;
  53
  54 /* === M A C R O S ========================================================= */
  55
  56 #define SPINBUTTON_WIDTH 100
  57
  58 /* === G L O B A L S ======================================================= */
  59
  60 /* === P R O C E D U R E S ================================================= */
  61
  62 /* === C L A S S E S ======================================================= */
  63
  64 ColorSlider::ColorSlider(const ColorSlider::Type &x):
  65         type(x)
  66 {
  67         signal_expose_event().connect(sigc::mem_fun(*this, &ColorSlider::redraw));
  68         set_size_request(-1,12);
  69         add_events(Gdk::BUTTON_PRESS_MASK | Gdk::BUTTON_RELEASE_MASK);
  70         add_events(Gdk::BUTTON1_MOTION_MASK);
  71 }
  72
  73 void
  74 ColorSlider::set_type(Type x) { type=x; queue_draw(); }
  75
  76 void
  77 ColorSlider::set_color(synfig::Color x) { color_=x; queue_draw(); }
  78
  79 void
  80 ColorSlider::slider_color_TYPE_R(synfig::Color &color, float amount) { color.set_r(amount); }
  81 void
  82 ColorSlider::slider_color_TYPE_G(synfig::Color &color, float amount) { color.set_g(amount); }
  83 void
  84 ColorSlider::slider_color_TYPE_B(synfig::Color &color, float amount) { color.set_b(amount); }
  85 void
  86 ColorSlider::slider_color_TYPE_Y(synfig::Color &color, float amount) { color.set_y(amount); }
  87 void
  88 ColorSlider::slider_color_TYPE_U(synfig::Color &color, float amount) { color.set_u(amount-0.5f); }
  89 void
  90 ColorSlider::slider_color_TYPE_V(synfig::Color &color, float amount) { color.set_v(amount-0.5f); }
  91 void
  92 ColorSlider::slider_color_TYPE_HUE(synfig::Color &color, float amount) { color.set_uv_angle(Angle::rot(amount)); }
  93 void
  94 ColorSlider::slider_color_TYPE_SAT(synfig::Color &color, float amount) { color.set_s(amount*0.5f); }
  95 void
  96 ColorSlider::slider_color_TYPE_A(synfig::Color &color, float amount) { color.set_a(amount); }
  97
  98 void
  99 ColorSlider::adjust_color(Type type, synfig::Color &color, float amount)
 100 {
 101         static const slider_color_func jump_table[int(TYPE_END)] =
 102         {
 103                 slider_color_TYPE_R,
 104                 slider_color_TYPE_G,
 105                 slider_color_TYPE_B,
 106                 slider_color_TYPE_Y,
 107                 slider_color_TYPE_U,
 108                 slider_color_TYPE_V,
 109                 slider_color_TYPE_HUE,
 110                 slider_color_TYPE_SAT,
 111                 slider_color_TYPE_A,
 112         };
 113         jump_table[int(type)](color,amount);
 114 }
 115
 116 bool
 117 ColorSlider::redraw(GdkEventExpose */*bleh*/)
 118 {
 119         Color color(color_);
 120
 121         static const slider_color_func jump_table[int(TYPE_END)] =
 122         {
 123                 slider_color_TYPE_R,
 124                 slider_color_TYPE_G,
 125                 slider_color_TYPE_B,
 126                 slider_color_TYPE_Y,
 127                 slider_color_TYPE_U,
 128                 slider_color_TYPE_V,
 129                 slider_color_TYPE_HUE,
 130                 slider_color_TYPE_SAT,
 131                 slider_color_TYPE_A,
 132         };
 133
 134         slider_color_func color_func(jump_table[int(type)]);
 135
 136         float amount;
 137         switch(type)
 138         {
 139                 case TYPE_R: amount=color.get_r(); break;
 140                 case TYPE_G: amount=color.get_g(); break;
 141                 case TYPE_B: amount=color.get_b(); break;
 142                 case TYPE_Y: amount=color.get_y(); break;
 143                 case TYPE_U: amount=color.get_u()+0.5; break;
 144                 case TYPE_V: amount=color.get_v()+0.5; break;
 145                 case TYPE_HUE: amount=Angle::rot(color.get_uv_angle()).get(); amount-=floor(amount); break;
 146                 case TYPE_SAT: amount=color.get_s()*2.0; break;
 147                 case TYPE_A: amount=color.get_a(); break;
 148                 default: amount=0; break;
 149         }
 150         if(use_colorspace_gamma() && (type<TYPE_U))
 151                 amount=gamma_in(amount);
 152
 153         const int height(get_height());
 154         const int width(get_width());
 155
 156         Gdk::Rectangle ca(0,0,width,height);
 157
 158         Glib::RefPtr<Gdk::GC> gc(Gdk::GC::create(get_window()));
 159         const Color bg1(0.75, 0.75, 0.75);
 160         const Color bg2(0.5, 0.5, 0.5);
 161         int i;
 162         for(i=width-1;i>=0;i--)
 163         {
 164                 color_func(color,
 165                                    (use_colorspace_gamma() && type<TYPE_U)
 166                                    ? gamma_out(float(i)/float(width))
 167                                    :              (float(i)/float(width)));
 168                 const Color c1(Color::blend(color,bg1,1.0).clamped());
 169                 const Color c2(Color::blend(color,bg2,1.0).clamped());
 170                 assert(c1.is_valid());
 171                 assert(c2.is_valid());
 172
 173                 if((i*2/height)&1)
 174                 {
 175                         gc->set_rgb_fg_color(colorconv_synfig2gdk(c1));
 176                         get_window()->draw_rectangle(gc, true, ca.get_x()+i, ca.get_y(), 1, height/2);
 177
 178                         gc->set_rgb_fg_color(colorconv_synfig2gdk(c2));
 179                         get_window()->draw_rectangle(gc, true, ca.get_x()+i, ca.get_y()+height/2, 1, height/2);
 180                 }
 181                 else
 182                 {
 183                         gc->set_rgb_fg_color(colorconv_synfig2gdk(c2));
 184                         get_window()->draw_rectangle(gc, true, ca.get_x()+i, ca.get_y(), 1, height/2);
 185
 186                         gc->set_rgb_fg_color(colorconv_synfig2gdk(c1));
 187                         get_window()->draw_rectangle(gc, true, ca.get_x()+i, ca.get_y()+height/2, 1, height/2);
 188                 }
 189         }
 190
 191         get_style()->paint_arrow(
 192                 get_window(),
 193                 Gtk::STATE_SELECTED,
 194                 Gtk::SHADOW_OUT,
 195                 ca,
 196                 *this,
 197                 " ",
 198                 Gtk::ARROW_UP,
 199                 1,
 200                 int(amount*width)-height/2,
 201                 0,
 202                 height,
 203                 height
 204         );
 205
 206         gc->set_rgb_fg_color(Gdk::Color("#ffffff"));
 207         get_window()->draw_rectangle(gc, false, ca.get_x()+1, ca.get_y()+1, width-3, height-3);
 208         gc->set_rgb_fg_color(Gdk::Color("#000000"));
 209         get_window()->draw_rectangle(gc, false, ca.get_x(), ca.get_y(), width-1, height-1);
 210         return true;
 211 }
 212
 213 bool
 214 ColorSlider::on_event(GdkEvent *event)
 215 {
 216         const int width(get_width());
 217         float x = 0;
 218         if( GDK_SCROLL == event->type ){
 219                 Color color(color_);
 220                 float amount;
 221                 switch(type)
 222                 {
 223                         case TYPE_R: amount=color.get_r(); break;
 224                         case TYPE_G: amount=color.get_g(); break;
 225                         case TYPE_B: amount=color.get_b(); break;
 226                         case TYPE_Y: amount=color.get_y(); break;
 227                         case TYPE_U: amount=color.get_u()+0.5; break;
 228                         case TYPE_V: amount=color.get_v()+0.5; break;
 229                         case TYPE_HUE: amount=Angle::rot(color.get_uv_angle()).get(); amount-=floor(amount); break;
 230                         case TYPE_SAT: amount=color.get_s()*2.0; break;
 231                         case TYPE_A: amount=color.get_a(); break;
 232                         default: amount=0; break;
 233                 }
 234                 if(use_colorspace_gamma() && (type<TYPE_U))
 235                         amount=gamma_in(amount);
 236                 x = amount*width;
 237                 switch(event->scroll.direction){
 238                         case GDK_SCROLL_UP:
 239                         case GDK_SCROLL_RIGHT:
 240                                 x+=1.0;
 241                                 break;
 242                         case GDK_SCROLL_DOWN:
 243                         case GDK_SCROLL_LEFT:
 244                                 x-=1.0;
 245                                 break;
 246                 }
 247         } else {
 248                 x = float(event->button.x);
 249         }
 250
 251         float pos(x/width);
 252         if(pos<0 || x<=0)pos=0;
 253         if(pos>1)pos=1;
 254
 255         if(use_colorspace_gamma() && (type<TYPE_U))
 256                 pos=gamma_out(pos);
 257         if(pos<0 || event->button.x<=0)pos=0;
 258         if(pos>1)pos=1;
 259
 260         switch(event->type)
 261         {
 262         case GDK_SCROLL:
 263                 signal_slider_moved_(type,pos);
 264                 queue_draw();
 265                 signal_activated_();
 266                 return true;
 267
 268         case GDK_BUTTON_RELEASE:
 269                 signal_activated_();
 270                 return true;
 271
 272         case GDK_BUTTON_PRESS:
 273         case GDK_MOTION_NOTIFY:
 274 //              adjust_color(type,color_,pos);
 275                 signal_slider_moved_(type,pos);
 276                 queue_draw();
 277                 return true;
 278                 break;
 279         default:
 280                 break;
 281         }
 282         return false;
 283 }
 284
 285 /* === M E T H O D S ======================================================= */
 286
 287 Widget_ColorEdit::Widget_ColorEdit():
 288         R_adjustment(0,-10000000,10000000,1,10,0),
 289         G_adjustment(0,-10000000,10000000,1,10,0),
 290         B_adjustment(0,-10000000,10000000,1,10,0),
 291         A_adjustment(0,-10000000,10000000,1,10,0)
 292 {
 293         notebook=manage(new Gtk::Notebook);
 294
 295         Gtk::Table* rgb_table(manage(new Gtk::Table()));
 296         Gtk::Table* yuv_table(manage(new Gtk::Table()));
 297         Gtk::Table* main_table(this);
 298
 299         {
 300                 Gtk::VBox* rgb_box(manage(new Gtk::VBox()));
 301                 Gtk::VBox* yuv_box(manage(new Gtk::VBox()));
 302                 rgb_box->pack_start(*rgb_table,false,false);
 303                 yuv_box->pack_start(*yuv_table,false,false);
 304                 notebook->append_page(*rgb_box,_("RGB"));
 305                 notebook->append_page(*yuv_box,_("YUV"));
 306         }
 307
 308         color=Color(0,0,0,0);
 309
 310         set_size_request(200,-1);
 311         hold_signals=true;
 312
 313         Gtk::Label *label;
 314
 315         R_adjustment.set_lower(-10000000);
 316         G_adjustment.set_lower(-10000000);
 317         B_adjustment.set_lower(-10000000);
 318         A_adjustment.set_lower(-10000000);
 319
 320         clamp_=true;
 321
 322         Pango::AttrList attr_list;
 323         Pango::AttrInt pango_size(Pango::Attribute::create_attr_size(Pango::SCALE*7));
 324         pango_size.set_start_index(0);
 325         pango_size.set_end_index(64);
 326         attr_list.change(pango_size);
 327
 328         widget_color.set_size_request(-1,16);
 329         attach(widget_color, 0, 2, 0, 1, Gtk::EXPAND|Gtk::FILL, Gtk::EXPAND|Gtk::FILL, 0, 0);
 330         attach(*notebook, 0, 2, 1, 2, Gtk::EXPAND|Gtk::FILL, Gtk::EXPAND|Gtk::FILL, 0, 0);
 331
 332 #define SLIDER_ROW(i,n,l) \
 333         slider_##n=manage(new ColorSlider(ColorSlider::TYPE_##n));      \
 334         slider_##n->signal_slider_moved().connect(sigc::mem_fun(*this,&studio::Widget_ColorEdit::on_slider_moved)); \
 335         /*slider_##n->signal_activated().connect(sigc::mem_fun(*this,&studio::Widget_ColorEdit::activated));*/ \
 336         slider_##n->signal_activated().connect(sigc::mem_fun(*this,&studio::Widget_ColorEdit::on_value_changed)); \
 337         label=manage(new class Gtk::Label(l,0.0,0.5)); \
 338         label->set_use_markup(false); \
 339         label->set_use_underline(false); \
 340         label->set_attributes(attr_list); \
 341         table->attach(*label, 0, 1, 1+2*i, 2+2*i, Gtk::EXPAND|Gtk::FILL, Gtk::EXPAND|Gtk::FILL, 0, 0);  \
 342         table->attach(*slider_##n, 0, 1, 2+2*i, 3+2*i, Gtk::EXPAND|Gtk::FILL, Gtk::EXPAND|Gtk::FILL, 0, 0)
 343
 344 #define ATTACH_SPIN_BUTTON(i,n) \
 345         spinbutton_##n=manage(new class Gtk::SpinButton(n##_adjustment,1,0)); \
 346         spinbutton_##n->set_update_policy(Gtk::UPDATE_ALWAYS); \
 347         spinbutton_##n->set_size_request(SPINBUTTON_WIDTH,-1); \
 348         spinbutton_##n->show(); \
 349         table->attach(*spinbutton_##n, 1, 2, 1+2*i, 3+2*i, Gtk::SHRINK, Gtk::EXPAND, 2, 0)
 350
 351         {
 352                 Gtk::Table* table(rgb_table);
 353                 SLIDER_ROW(0,R,_("Red"));
 354                 ATTACH_SPIN_BUTTON(0,R);
 355                 SLIDER_ROW(1,G,_("Green"));
 356                 ATTACH_SPIN_BUTTON(1,G);
 357                 SLIDER_ROW(2,B,_("Blue"));
 358                 ATTACH_SPIN_BUTTON(2,B);
 359
 360                 hex_color_label = manage(new Gtk::Label(_("HTML code"), 0.0, 0.5));
 361                 hex_color_label->set_use_markup(false);
 362                 hex_color_label->set_use_underline(false);
 363                 hex_color_label->set_attributes(attr_list);
 364                 table->attach(*hex_color_label, 0, 1, 7, 8, Gtk::SHRINK, Gtk::SHRINK, 0, 0);
 365
 366                 hex_color = manage(new Gtk::Entry());
 367                 hex_color->set_width_chars(8);
 368                 hex_color->signal_activate().connect(sigc::mem_fun(*this,&studio::Widget_ColorEdit::on_hex_edited));
 369                 table->attach(*hex_color, 0, 1, 8, 9, Gtk::SHRINK, Gtk::SHRINK, 0, 0);
 370         }
 371         {
 372                 Gtk::Table* table(yuv_table);
 373                 SLIDER_ROW(0,Y,_("Luma"));
 374                 SLIDER_ROW(1,HUE,_("Hue"));
 375                 SLIDER_ROW(2,SAT,_("Saturation"));
 376                 SLIDER_ROW(3,U,_("U"));
 377                 SLIDER_ROW(4,V,_("V"));
 378         }
 379         {
 380                 Gtk::Table* table(main_table);
 381                 SLIDER_ROW(1,A,_("Alpha"));
 382                 ATTACH_SPIN_BUTTON(1,A);
 383         }
 384
 385 #undef SLIDER_ROW
 386 #undef ATTACH_SPIN_BUTTON
 387
 388         spinbutton_R->signal_activate().connect(sigc::mem_fun(*spinbutton_G,&Gtk::SpinButton::grab_focus));
 389         spinbutton_G->signal_activate().connect(sigc::mem_fun(*spinbutton_B,&Gtk::SpinButton::grab_focus));
 390         spinbutton_B->signal_activate().connect(sigc::mem_fun(*spinbutton_A,&Gtk::SpinButton::grab_focus));
 391         spinbutton_A->signal_activate().connect(sigc::mem_fun(*spinbutton_R,&Gtk::SpinButton::grab_focus));
 392
 393         R_adjustment.signal_value_changed().connect(sigc::mem_fun(*this,&studio::Widget_ColorEdit::on_value_changed));
 394         G_adjustment.signal_value_changed().connect(sigc::mem_fun(*this,&studio::Widget_ColorEdit::on_value_changed));
 395         B_adjustment.signal_value_changed().connect(sigc::mem_fun(*this,&studio::Widget_ColorEdit::on_value_changed));
 396         A_adjustment.signal_value_changed().connect(sigc::mem_fun(*this,&studio::Widget_ColorEdit::on_value_changed));
 397
 398         show_all_children();
 399
 400         set_digits(1);
 401         set_value(color);
 402
 403         hold_signals=false;
 404 }
 405
 406 Widget_ColorEdit::~Widget_ColorEdit()
 407 {
 408 }
 409
 410 void
 411 Widget_ColorEdit::on_slider_moved(ColorSlider::Type type, float amount)
 412 {
 413         Color color(get_value_raw());
 414
 415         assert(color.is_valid());
 416         ColorSlider::adjust_color(type,color,amount);
 417         assert(color.is_valid());
 418
 419         // If a non-primary colorslider is adjusted,
 420         // we want to make sure that we clamp
 421         if(type>ColorSlider::TYPE_B && (color.get_r()<0 ||color.get_g()<0 ||color.get_b()<0))
 422                 clamp_=true;
 423
 424         /*
 425         if(type==ColorSlider::TYPE_R && color.get_r()<0)clamp_=false;
 426         if(type==ColorSlider::TYPE_G && color.get_g()<0)clamp_=false;
 427         if(type==ColorSlider::TYPE_B && color.get_b()<0)clamp_=false;
 428         */
 429         clamp_=false;
 430
 431         set_value(color);
 432         assert(color.is_valid());
 433 }
 434
 435 void
 436 Widget_ColorEdit::on_hex_edited()
 437 {
 438         Color color(get_value_raw());
 439         String s = hex_color->get_text();
 440         color.set_hex(s);
 441         set_value(color);
 442         signal_value_changed_();
 443 }
 444
 445 void
 446 Widget_ColorEdit::on_value_changed()
 447 {
 448         if(hold_signals)
 449                 return;
 450
 451         const Color color(get_value_raw());
 452         assert(color.is_valid());
 453         slider_R->set_color(color);
 454         slider_G->set_color(color);
 455         slider_B->set_color(color);
 456         slider_Y->set_color(color);
 457         slider_U->set_color(color);
 458         slider_V->set_color(color);
 459         slider_HUE->set_color(color);
 460         slider_SAT->set_color(color);
 461         slider_A->set_color(color);
 462         hex_color->set_text(color.get_hex());
 463         widget_color.set_value(color);
 464
 465         activate();
 466         signal_value_changed_();
 467 }
 468
 469 void
 470 Widget_ColorEdit::set_has_frame(bool x)
 471 {
 472         spinbutton_R->set_has_frame(x);
 473         spinbutton_G->set_has_frame(x);
 474         spinbutton_B->set_has_frame(x);
 475         spinbutton_A->set_has_frame(x);
 476         spinbutton_R->set_size_request(SPINBUTTON_WIDTH,-1);
 477         spinbutton_G->set_size_request(SPINBUTTON_WIDTH,-1);
 478         spinbutton_B->set_size_request(SPINBUTTON_WIDTH,-1);
 479         spinbutton_A->set_size_request(SPINBUTTON_WIDTH,-1);
 480 }
 481
 482 void
 483 Widget_ColorEdit::set_digits(int x)
 484 {
 485         spinbutton_R->set_digits(x);
 486         spinbutton_G->set_digits(x);
 487         spinbutton_B->set_digits(x);
 488         spinbutton_A->set_digits(x);
 489         spinbutton_R->set_size_request(SPINBUTTON_WIDTH,-1);
 490         spinbutton_G->set_size_request(SPINBUTTON_WIDTH,-1);
 491         spinbutton_B->set_size_request(SPINBUTTON_WIDTH,-1);
 492         spinbutton_A->set_size_request(SPINBUTTON_WIDTH,-1);
 493 }
 494
 495 void
 496 Widget_ColorEdit::set_value(const synfig::Color &data)
 497 {
 498         assert(data.is_valid());
 499         hold_signals=true;
 500         clamp_=false;
 501
 502         color=data;
 503
 504         if(use_colorspace_gamma())
 505         {
 506                 R_adjustment.set_value(gamma_in(color.get_r())*100);
 507                 G_adjustment.set_value(gamma_in(color.get_g())*100);
 508                 B_adjustment.set_value(gamma_in(color.get_b())*100);
 509         }
 510         else
 511         {
 512                 R_adjustment.set_value(color.get_r()*100);
 513                 G_adjustment.set_value(color.get_g()*100);
 514                 B_adjustment.set_value(color.get_b()*100);
 515         }
 516         A_adjustment.set_value(color.get_a()*100);
 517
 518         slider_R->set_color(color);
 519         slider_G->set_color(color);
 520         slider_B->set_color(color);
 521         slider_Y->set_color(color);
 522         slider_U->set_color(color);
 523         slider_V->set_color(color);
 524         slider_HUE->set_color(color);
 525         slider_SAT->set_color(color);
 526         slider_A->set_color(color);
 527         hex_color->set_text(color.get_hex());
 528         widget_color.set_value(color);
 529
 530         hold_signals=false;
 531 }
 532
 533 synfig::Color
 534 Widget_ColorEdit::get_value_raw()
 535 {
 536         Color color;
 537         if(use_colorspace_gamma())
 538         {
 539                 color.set_r(gamma_out(R_adjustment.get_value()/100.0f));
 540                 color.set_g(gamma_out(G_adjustment.get_value()/100.0f));
 541                 color.set_b(gamma_out(B_adjustment.get_value()/100.0f));
 542         }
 543         else
 544         {
 545                 color.set_r(R_adjustment.get_value()/100);
 546                 color.set_g(G_adjustment.get_value()/100);
 547                 color.set_b(B_adjustment.get_value()/100);
 548         }
 549         color.set_a(A_adjustment.get_value()/100);
 550         assert(color.is_valid());
 551
 552         return color;
 553 }
 554
 555 const synfig::Color &
 556 Widget_ColorEdit::get_value()
 557 {
 558         if(use_colorspace_gamma())
 559         {
 560                 color.set_r(gamma_out(R_adjustment.get_value()/100.0f));
 561                 color.set_g(gamma_out(G_adjustment.get_value()/100.0f));
 562                 color.set_b(gamma_out(B_adjustment.get_value()/100.0f));
 563                 assert(color.is_valid());
 564         }
 565         else
 566         {
 567                 color.set_r(R_adjustment.get_value()/100);
 568                 color.set_g(G_adjustment.get_value()/100);
 569                 color.set_b(B_adjustment.get_value()/100);
 570                 assert(color.is_valid());
 571         }
 572         color.set_a(A_adjustment.get_value()/100);
 573         assert(color.is_valid());
 574
 575         if(notebook->get_current_page()!=0)
 576                 color=color.clamped();
 577
 578         /*{
 579                 // Clamp out negative values
 580                 color.set_r(std::max(0.0f,(float)color.get_r()));
 581                 color.set_g(std::max(0.0f,(float)color.get_g()));
 582                 color.set_b(std::max(0.0f,(float)color.get_b()));
 583         }*/
 584
 585         return color;
 586 }