cinelerra-5.1/plugins/chromakey/chromakey.C

   1
   2 /*
   3  * CINELERRA
   4  * Copyright (C) 2008 Adam Williams <broadcast at earthling dot net>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  *
  20  */
  21
  22 #include "bccolors.h"
  23 #include "bcdisplayinfo.h"
  24 #include "bcsignals.h"
  25 #include "chromakey.h"
  26 #include "clip.h"
  27 #include "bchash.h"
  28 #include "filexml.h"
  29 #include "guicast.h"
  30 #include "keyframe.h"
  31 #include "language.h"
  32 #include "loadbalance.h"
  33 #include "playback3d.h"
  34 #include "bccolors.h"
  35 #include "pluginvclient.h"
  36 #include "vframe.h"
  37
  38 #include <stdint.h>
  39 #include <string.h>
  40
  41
  42
  43 ChromaKeyConfig::ChromaKeyConfig()
  44 {
  45        reset();
  46 }
  47
  48 void ChromaKeyConfig::reset()
  49
  50 {
  51         red = 0.0;
  52         green = 0.0;
  53         blue = 0.0;
  54         threshold = 60.0;
  55         use_value = 0;
  56         slope = 100;
  57 }
  58
  59
  60 void ChromaKeyConfig::copy_from(ChromaKeyConfig &src)
  61 {
  62         red = src.red;
  63         green = src.green;
  64         blue = src.blue;
  65         threshold = src.threshold;
  66         use_value = src.use_value;
  67         slope = src.slope;
  68 }
  69
  70 int ChromaKeyConfig::equivalent(ChromaKeyConfig &src)
  71 {
  72         return (EQUIV(red, src.red) &&
  73                 EQUIV(green, src.green) &&
  74                 EQUIV(blue, src.blue) &&
  75                 EQUIV(threshold, src.threshold) &&
  76                 EQUIV(slope, src.slope) &&
  77                 use_value == src.use_value);
  78 }
  79
  80 void ChromaKeyConfig::interpolate(ChromaKeyConfig &prev,
  81         ChromaKeyConfig &next,
  82         int64_t prev_frame,
  83         int64_t next_frame,
  84         int64_t current_frame)
  85 {
  86         double next_scale = (double)(current_frame - prev_frame) / (next_frame - prev_frame);
  87         double prev_scale = (double)(next_frame - current_frame) / (next_frame - prev_frame);
  88
  89         this->red = prev.red * prev_scale + next.red * next_scale;
  90         this->green = prev.green * prev_scale + next.green * next_scale;
  91         this->blue = prev.blue * prev_scale + next.blue * next_scale;
  92         this->threshold = prev.threshold * prev_scale + next.threshold * next_scale;
  93         this->slope = prev.slope * prev_scale + next.slope * next_scale;
  94         this->use_value = prev.use_value;
  95 }
  96
  97 int ChromaKeyConfig::get_color()
  98 {
  99         int red = (int)(CLIP(this->red, 0, 1) * 0xff);
 100         int green = (int)(CLIP(this->green, 0, 1) * 0xff);
 101         int blue = (int)(CLIP(this->blue, 0, 1) * 0xff);
 102         return (red << 16) | (green << 8) | blue;
 103 }
 104
 105
 106
 107
 108
 109
 110
 111 ChromaKeyWindow::ChromaKeyWindow(ChromaKey *plugin)
 112  : PluginClientWindow(plugin,
 113         xS(320),
 114         yS(220),
 115         xS(320),
 116         yS(220),
 117         0)
 118 {
 119         this->plugin = plugin;
 120         color_thread = 0;
 121 }
 122
 123 ChromaKeyWindow::~ChromaKeyWindow()
 124 {
 125         delete color_thread;
 126 }
 127
 128 void ChromaKeyWindow::create_objects()
 129 {
 130         int xs10 = xS(10), xs100 = xS(100);
 131         int ys10 = yS(10), ys30 = yS(30), ys50 = yS(50);
 132         int x = xs10, y = ys10, x1 = xS(100);
 133
 134         BC_Title *title;
 135         add_subwindow(title = new BC_Title(x, y, _("Color:")));
 136         x += title->get_w() + xs10;
 137         add_subwindow(color = new ChromaKeyColor(plugin, this, x, y));
 138         x += color->get_w() + xs10;
 139         add_subwindow(sample = new BC_SubWindow(x, y, xs100, ys50));
 140         y += sample->get_h() + xs10;
 141         x = xs10;
 142
 143         add_subwindow(new BC_Title(x, y, _("Slope:")));
 144         add_subwindow(slope = new ChromaKeySlope(plugin, x1, y));
 145
 146         y += ys30;
 147         add_subwindow(new BC_Title(x, y, _("Threshold:")));
 148         add_subwindow(threshold = new ChromaKeyThreshold(plugin, x1, y));
 149
 150
 151         y += ys30;
 152         add_subwindow(use_value = new ChromaKeyUseValue(plugin, x1, y));
 153
 154         y += ys30;
 155         add_subwindow(use_colorpicker = new ChromaKeyUseColorPicker(plugin, this, x1, y));
 156
 157         y += use_colorpicker->get_h() + xs10;
 158         add_subwindow(new ChromaKeyReset(plugin, this, x, y));
 159
 160         color_thread = new ChromaKeyColorThread(plugin, this);
 161
 162         update_sample();
 163         show_window();
 164         flush();
 165 }
 166
 167 void ChromaKeyWindow::update_sample()
 168 {
 169         sample->set_color(plugin->config.get_color());
 170         sample->draw_box(0,
 171                 0,
 172                 sample->get_w(),
 173                 sample->get_h());
 174         sample->set_color(BLACK);
 175         sample->draw_rectangle(0,
 176                 0,
 177                 sample->get_w(),
 178                 sample->get_h());
 179         sample->flash();
 180 }
 181
 182 void ChromaKeyWindow::done_event(int result)
 183 {
 184         color_thread->close_window();
 185 }
 186
 187
 188
 189
 190
 191
 192
 193
 194
 195 ChromaKeyColor::ChromaKeyColor(ChromaKey *plugin,
 196         ChromaKeyWindow *gui,
 197         int x,
 198         int y)
 199  : BC_GenericButton(x,
 200         y,
 201         _("Color..."))
 202 {
 203         this->plugin = plugin;
 204         this->gui = gui;
 205 }
 206 int ChromaKeyColor::handle_event()
 207 {
 208         gui->color_thread->start_window(
 209                 plugin->config.get_color(),
 210                 0xff);
 211         return 1;
 212 }
 213
 214
 215
 216
 217 ChromaKeyThreshold::ChromaKeyThreshold(ChromaKey *plugin, int x, int y)
 218  : BC_FSlider(x,
 219                         y,
 220                         0,
 221                         xS(200),
 222                         yS(200),
 223                         (float)0,
 224                         (float)100,
 225                         plugin->config.threshold)
 226 {
 227         this->plugin = plugin;
 228         set_precision(0.01);
 229 }
 230 int ChromaKeyThreshold::handle_event()
 231 {
 232         plugin->config.threshold = get_value();
 233         plugin->send_configure_change();
 234         return 1;
 235 }
 236
 237
 238 ChromaKeySlope::ChromaKeySlope(ChromaKey *plugin, int x, int y)
 239  : BC_FSlider(x,
 240                         y,
 241                         0,
 242                         xS(200),
 243                         yS(200),
 244                         (float)0,
 245                         (float)100,
 246                         plugin->config.slope)
 247 {
 248         this->plugin = plugin;
 249         set_precision(0.01);
 250 }
 251
 252 int ChromaKeySlope::handle_event()
 253 {
 254         plugin->config.slope = get_value();
 255         plugin->send_configure_change();
 256         return 1;
 257 }
 258
 259 ChromaKeyUseValue::ChromaKeyUseValue(ChromaKey *plugin, int x, int y)
 260  : BC_CheckBox(x, y, plugin->config.use_value, _("Use value"))
 261 {
 262         this->plugin = plugin;
 263 }
 264 int ChromaKeyUseValue::handle_event()
 265 {
 266         plugin->config.use_value = get_value();
 267         plugin->send_configure_change();
 268         return 1;
 269 }
 270
 271 ChromaKeyReset::ChromaKeyReset(ChromaKey *plugin, ChromaKeyWindow *gui, int x, int y)
 272  : BC_GenericButton(x, y, _("Reset"))
 273 {
 274         this->plugin = plugin;
 275         this->gui = gui;
 276 }
 277
 278 int ChromaKeyReset::handle_event()
 279 {
 280         plugin->config.reset();
 281         gui->update_gui();
 282         plugin->send_configure_change();
 283         return 1;
 284 }
 285
 286 ChromaKeyUseColorPicker::ChromaKeyUseColorPicker(ChromaKey *plugin,
 287         ChromaKeyWindow *gui,
 288         int x,
 289         int y)
 290  : BC_GenericButton(x, y, _("Use color picker"))
 291 {
 292         this->plugin = plugin;
 293         this->gui = gui;
 294 }
 295
 296 int ChromaKeyUseColorPicker::handle_event()
 297 {
 298         plugin->config.red = plugin->get_red();
 299         plugin->config.green = plugin->get_green();
 300         plugin->config.blue = plugin->get_blue();
 301         gui->update_sample();
 302         plugin->send_configure_change();
 303         return 1;
 304 }
 305
 306
 307
 308
 309 ChromaKeyColorThread::ChromaKeyColorThread(ChromaKey *plugin, ChromaKeyWindow *gui)
 310  : ColorPicker(1, _("Inner color"))
 311 {
 312         this->plugin = plugin;
 313         this->gui = gui;
 314 }
 315
 316 int ChromaKeyColorThread::handle_new_color(int output, int alpha)
 317 {
 318         plugin->config.red = (float)(output & 0xff0000) / 0xff0000;
 319         plugin->config.green = (float)(output & 0xff00) / 0xff00;
 320         plugin->config.blue = (float)(output & 0xff) / 0xff;
 321         gui->update_sample();
 322         plugin->send_configure_change();
 323         return 1;
 324 }
 325
 326
 327
 328
 329
 330
 331
 332
 333
 334
 335 ChromaKeyServer::ChromaKeyServer(ChromaKey *plugin)
 336  : LoadServer(plugin->PluginClient::smp + 1, plugin->PluginClient::smp + 1)
 337 {
 338         this->plugin = plugin;
 339 }
 340 void ChromaKeyServer::init_packages()
 341 {
 342         for(int i = 0; i < get_total_packages(); i++)
 343         {
 344                 ChromaKeyPackage *pkg = (ChromaKeyPackage*)get_package(i);
 345                 pkg->y1 = plugin->input->get_h() * i / get_total_packages();
 346                 pkg->y2 = plugin->input->get_h() * (i + 1) / get_total_packages();
 347         }
 348
 349 }
 350 LoadClient* ChromaKeyServer::new_client()
 351 {
 352         return new ChromaKeyUnit(plugin, this);
 353 }
 354 LoadPackage* ChromaKeyServer::new_package()
 355 {
 356         return new ChromaKeyPackage;
 357 }
 358
 359
 360
 361 ChromaKeyPackage::ChromaKeyPackage()
 362  : LoadPackage()
 363 {
 364 }
 365
 366 ChromaKeyUnit::ChromaKeyUnit(ChromaKey *plugin, ChromaKeyServer *server)
 367  : LoadClient(server)
 368 {
 369         this->plugin = plugin;
 370 }
 371
 372
 373 void ChromaKeyUnit::process_package(LoadPackage *package)
 374 {
 375         ChromaKeyPackage *pkg = (ChromaKeyPackage*)package;
 376
 377         int w = plugin->input->get_w();
 378
 379         float h, s, v;
 380         HSV::rgb_to_hsv(plugin->config.red,
 381                 plugin->config.green,
 382                 plugin->config.blue,
 383                 h,
 384                 s,
 385                 v);
 386         //float min_hue = h - plugin->config.threshold * 360 / 100;
 387         //float max_hue = h + plugin->config.threshold * 360 / 100;
 388
 389
 390 #define RGB_TO_VALUE(r, g, b) YUV::yuv.rgb_to_y_f((r),(g),(b))
 391
 392 #define OUTER_VARIABLES(plugin) \
 393         float value = RGB_TO_VALUE(plugin->config.red, \
 394                 plugin->config.green, \
 395                 plugin->config.blue); \
 396         float threshold = plugin->config.threshold / 100; \
 397         float min_v = value - threshold; \
 398         float max_v = value + threshold; \
 399         float r_key = plugin->config.red; \
 400         float g_key = plugin->config.green; \
 401         float b_key = plugin->config.blue; \
 402         int y_key, u_key, v_key; \
 403         YUV::yuv.rgb_to_yuv_8( \
 404                 (int)(r_key * 0xff), (int)(g_key * 0xff), (int)(b_key * 0xff), \
 405                 y_key, u_key, v_key); \
 406         float run = plugin->config.slope / 100; \
 407         float threshold_run = threshold + run;
 408
 409         OUTER_VARIABLES(plugin)
 410
 411
 412
 413 #define CHROMAKEY(type, components, max, use_yuv) \
 414 { \
 415         for(int i = pkg->y1; i < pkg->y2; i++) \
 416         { \
 417                 type *row = (type*)plugin->input->get_rows()[i]; \
 418  \
 419                 for(int j = 0; j < w; j++) \
 420                 { \
 421                         float a = 1; \
 422  \
 423 /* Test for value in range */ \
 424                         if(plugin->config.use_value) \
 425                         { \
 426                                 float current_value; \
 427                                 if(use_yuv) \
 428                                 { \
 429                                         float r = (float)row[0] / max; \
 430                                         current_value = r; \
 431                                 } \
 432                                 else \
 433                                 { \
 434                                         float r = (float)row[0] / max; \
 435                                         float g = (float)row[1] / max; \
 436                                         float b = (float)row[2] / max; \
 437                                         current_value = RGB_TO_VALUE(r, g, b); \
 438                                 } \
 439  \
 440 /* Full transparency if in range */ \
 441                                 if(current_value >= min_v && current_value < max_v) \
 442                                 { \
 443                                         a = 0; \
 444                                 } \
 445                                 else \
 446 /* Phased out if below or above range */ \
 447                                 if(current_value < min_v) \
 448                                 { \
 449                                         if(min_v - current_value < run) \
 450                                                 a = (min_v - current_value) / run; \
 451                                 } \
 452                                 else \
 453                                 if(current_value - max_v < run) \
 454                                         a = (current_value - max_v) / run; \
 455                         } \
 456                         else \
 457 /* Use color cube */ \
 458                         { \
 459                                 float difference; \
 460                                 if(use_yuv) \
 461                                 { \
 462                                         type y = row[0]; \
 463                                         type u = row[1]; \
 464                                         type v = row[2]; \
 465                                         difference = sqrt(SQR(y - y_key) + \
 466                                                 SQR(u - u_key) + \
 467                                                 SQR(v - v_key)) / max; \
 468                                 } \
 469                                 else \
 470                                 { \
 471                                         float r = (float)row[0] / max; \
 472                                         float g = (float)row[1] / max; \
 473                                         float b = (float)row[2] / max; \
 474                                         difference = sqrt(SQR(r - r_key) +  \
 475                                                 SQR(g - g_key) + \
 476                                                 SQR(b - b_key)); \
 477                                 } \
 478                                 if(difference < threshold) \
 479                                 { \
 480                                         a = 0; \
 481                                 } \
 482                                 else \
 483                                 if(difference < threshold_run) \
 484                                 { \
 485                                         a = (difference - threshold) / run; \
 486                                 } \
 487  \
 488                         } \
 489  \
 490 /* Multiply alpha and put back in frame */ \
 491                         if(components == 4) \
 492                         { \
 493                                 row[3] = MIN((type)(a * max), row[3]); \
 494                         } \
 495                         else \
 496                         if(use_yuv) \
 497                         { \
 498                                 row[0] = (type)(a * row[0]); \
 499                                 row[1] = (type)(a * (row[1] - (max / 2 + 1)) + max / 2 + 1); \
 500                                 row[2] = (type)(a * (row[2] - (max / 2 + 1)) + max / 2 + 1); \
 501                         } \
 502                         else \
 503                         { \
 504                                 row[0] = (type)(a * row[0]); \
 505                                 row[1] = (type)(a * row[1]); \
 506                                 row[2] = (type)(a * row[2]); \
 507                         } \
 508  \
 509                         row += components; \
 510                 } \
 511         } \
 512 }
 513
 514
 515
 516
 517         switch(plugin->input->get_color_model())
 518         {
 519                 case BC_RGB_FLOAT:
 520                         CHROMAKEY(float, 3, 1.0, 0);
 521                         break;
 522                 case BC_RGBA_FLOAT:
 523                         CHROMAKEY(float, 4, 1.0, 0);
 524                         break;
 525                 case BC_RGB888:
 526                         CHROMAKEY(unsigned char, 3, 0xff, 0);
 527                         break;
 528                 case BC_RGBA8888:
 529                         CHROMAKEY(unsigned char, 4, 0xff, 0);
 530                         break;
 531                 case BC_YUV888:
 532                         CHROMAKEY(unsigned char, 3, 0xff, 1);
 533                         break;
 534                 case BC_YUVA8888:
 535                         CHROMAKEY(unsigned char, 4, 0xff, 1);
 536                         break;
 537                 case BC_YUV161616:
 538                         CHROMAKEY(uint16_t, 3, 0xffff, 1);
 539                         break;
 540                 case BC_YUVA16161616:
 541                         CHROMAKEY(uint16_t, 4, 0xffff, 1);
 542                         break;
 543         }
 544
 545 }
 546
 547
 548
 549
 550
 551 REGISTER_PLUGIN(ChromaKey)
 552
 553
 554
 555 ChromaKey::ChromaKey(PluginServer *server)
 556  : PluginVClient(server)
 557 {
 558
 559         engine = 0;
 560 }
 561
 562 ChromaKey::~ChromaKey()
 563 {
 564
 565         delete engine;
 566 }
 567
 568
 569 int ChromaKey::process_buffer(VFrame *frame,
 570                 int64_t start_position,
 571                 double frame_rate)
 572 {
 573 SET_TRACE
 574
 575         load_configuration();
 576         this->input = frame;
 577         this->output = frame;
 578
 579         read_frame(frame,
 580                 0,
 581                 start_position,
 582                 frame_rate,
 583                 get_use_opengl());
 584
 585         if(EQUIV(config.threshold, 0))
 586         {
 587                 return 1;
 588         }
 589         else
 590         {
 591                 if(get_use_opengl()) return run_opengl();
 592
 593                 if(!engine) engine = new ChromaKeyServer(this);
 594                 engine->process_packages();
 595         }
 596 SET_TRACE
 597
 598         return 1;
 599 }
 600
 601 const char* ChromaKey::plugin_title() { return N_("Chroma key"); }
 602 int ChromaKey::is_realtime() { return 1; }
 603
 604 NEW_WINDOW_MACRO(ChromaKey, ChromaKeyWindow)
 605
 606 LOAD_CONFIGURATION_MACRO(ChromaKey, ChromaKeyConfig)
 607
 608
 609 void ChromaKey::save_data(KeyFrame *keyframe)
 610 {
 611         FileXML output;
 612         output.set_shared_output(keyframe->xbuf);
 613         output.tag.set_title("CHROMAKEY");
 614         output.tag.set_property("RED", config.red);
 615         output.tag.set_property("GREEN", config.green);
 616         output.tag.set_property("BLUE", config.blue);
 617         output.tag.set_property("THRESHOLD", config.threshold);
 618         output.tag.set_property("SLOPE", config.slope);
 619         output.tag.set_property("USE_VALUE", config.use_value);
 620         output.append_tag();
 621         output.tag.set_title("/CHROMAKEY");
 622         output.append_tag();
 623         output.append_newline();
 624         output.terminate_string();
 625 }
 626
 627 void ChromaKey::read_data(KeyFrame *keyframe)
 628 {
 629         FileXML input;
 630
 631         input.set_shared_input(keyframe->xbuf);
 632
 633         while(!input.read_tag())
 634         {
 635                 if(input.tag.title_is("CHROMAKEY"))
 636                 {
 637                         config.red = input.tag.get_property("RED", config.red);
 638                         config.green = input.tag.get_property("GREEN", config.green);
 639                         config.blue = input.tag.get_property("BLUE", config.blue);
 640                         config.threshold = input.tag.get_property("THRESHOLD", config.threshold);
 641                         config.slope = input.tag.get_property("SLOPE", config.slope);
 642                         config.use_value = input.tag.get_property("USE_VALUE", config.use_value);
 643                 }
 644         }
 645 }
 646
 647
 648
 649 void ChromaKey::update_gui()
 650 {
 651         if(thread)
 652         {
 653                 load_configuration();
 654                 thread->window->lock_window();
 655                 ((ChromaKeyWindow *)(thread->window))->update_gui();
 656                 thread->window->unlock_window();
 657         }
 658 }
 659
 660 void ChromaKeyWindow::update_gui()
 661 {
 662         ChromaKeyConfig &config = plugin->config;
 663         threshold->update(config.threshold);
 664         slope->update(config.slope);
 665         use_value->update(config.use_value);
 666         update_sample();
 667 }
 668
 669 int ChromaKey::handle_opengl()
 670 {
 671 #ifdef HAVE_GL
 672         OUTER_VARIABLES(this)
 673
 674
 675
 676         static const char *uniform_frag =
 677                 "uniform sampler2D tex;\n"
 678                 "uniform float min_v;\n"
 679                 "uniform float max_v;\n"
 680                 "uniform float run;\n"
 681                 "uniform float threshold;\n"
 682                 "uniform float threshold_run;\n"
 683                 "uniform vec3 key;\n";
 684
 685         static const char *get_yuvvalue_frag =
 686                 "float get_value(vec4 color)\n"
 687                 "{\n"
 688                 "       return abs(color.r);\n"
 689                 "}\n";
 690
 691         static const char *get_rgbvalue_frag =
 692                 "uniform vec3 rgb_to_y_vector;\n"
 693                 "uniform float yminf;\n"
 694                 "float get_value(vec4 color)\n"
 695                 "{\n"
 696                 "       return dot(color.rgb, rgb_to_y_vector) + yminf;\n"
 697                 "}\n";
 698
 699         static const char *value_frag =
 700                 "void main()\n"
 701                 "{\n"
 702                 "       vec4 color = texture2D(tex, gl_TexCoord[0].st);\n"
 703                 "       float value = get_value(color);\n"
 704                 "       float alpha = 1.0;\n"
 705                 "\n"
 706                 "       if(value >= min_v && value < max_v)\n"
 707                 "               alpha = 0.0;\n"
 708                 "       else\n"
 709                 "       if(value < min_v)\n"
 710                 "       {\n"
 711                 "               if(min_v - value < run)\n"
 712                 "                       alpha = (min_v - value) / run;\n"
 713                 "       }\n"
 714                 "       else\n"
 715                 "       if(value - max_v < run)\n"
 716                 "               alpha = (value - max_v) / run;\n"
 717                 "\n"
 718                 "       gl_FragColor = vec4(color.rgb, alpha);\n"
 719                 "}\n";
 720
 721         static const char *cube_frag =
 722                 "void main()\n"
 723                 "{\n"
 724                 "       vec4 color = texture2D(tex, gl_TexCoord[0].st);\n"
 725                 "       float difference = length(color.rgb - key);\n"
 726                 "       float alpha = 1.0;\n"
 727                 "       if(difference < threshold)\n"
 728                 "               alpha = 0.0;\n"
 729                 "       else\n"
 730                 "       if(difference < threshold_run)\n"
 731                 "               alpha = (difference - threshold) / run;\n"
 732                 "       gl_FragColor = vec4(color.rgb, min(color.a, alpha));\n"
 733                 "}\n";
 734
 735
 736
 737         get_output()->to_texture();
 738         get_output()->enable_opengl();
 739         get_output()->init_screen();
 740
 741         const char *shader_stack[16];
 742         memset(shader_stack,0, sizeof(shader_stack));
 743         int current_shader = 0;
 744         shader_stack[current_shader++] = uniform_frag;
 745
 746         switch(get_output()->get_color_model()) {
 747         case BC_YUV888:
 748         case BC_YUVA8888:
 749                 if( config.use_value ) {
 750                         shader_stack[current_shader++] = get_yuvvalue_frag;
 751                         shader_stack[current_shader++] = value_frag;
 752                 }
 753                 else {
 754                         shader_stack[current_shader++] = cube_frag;
 755                 }
 756                 break;
 757
 758         default:
 759                 if(config.use_value) {
 760                         shader_stack[current_shader++] = get_rgbvalue_frag;
 761                         shader_stack[current_shader++] = value_frag;
 762                 }
 763                 else {
 764                         shader_stack[current_shader++] = cube_frag;
 765                 }
 766                 break;
 767         }
 768 SET_TRACE
 769
 770         shader_stack[current_shader] = 0;
 771         unsigned int shader = VFrame::make_shader(shader_stack);
 772         if( shader > 0 ) {
 773                 get_output()->bind_texture(0);
 774                 glUseProgram(shader);
 775                 glUniform1i(glGetUniformLocation(shader, "tex"), 0);
 776                 glUniform1f(glGetUniformLocation(shader, "min_v"), min_v);
 777                 glUniform1f(glGetUniformLocation(shader, "max_v"), max_v);
 778                 glUniform1f(glGetUniformLocation(shader, "run"), run);
 779                 glUniform1f(glGetUniformLocation(shader, "threshold"), threshold);
 780                 glUniform1f(glGetUniformLocation(shader, "threshold_run"), threshold_run);
 781                 if(get_output()->get_color_model() != BC_YUV888 &&
 782                         get_output()->get_color_model() != BC_YUVA8888)
 783                         glUniform3f(glGetUniformLocation(shader, "key"),
 784                                 r_key, g_key, b_key);
 785                 else
 786                         glUniform3f(glGetUniformLocation(shader, "key"),
 787                                 (float)y_key / 0xff, (float)u_key / 0xff, (float)v_key / 0xff);
 788                 if(config.use_value)
 789                         BC_GL_RGB_TO_Y(shader);
 790         }
 791 SET_TRACE
 792
 793         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
 794         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
 795
 796         if(BC_CModels::components(get_output()->get_color_model()) == 3)
 797         {
 798                 glEnable(GL_BLEND);
 799                 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 800                 get_output()->clear_pbuffer();
 801         }
 802 SET_TRACE
 803
 804         get_output()->draw_texture();
 805
 806         glUseProgram(0);
 807         get_output()->set_opengl_state(VFrame::SCREEN);
 808         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
 809         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 810         glDisable(GL_BLEND);
 811 SET_TRACE
 812         return 0;
 813 #endif
 814 }
 815