git.sesse.net Git - casparcg/blob - modules/ogl/consumer/ogl_consumer.cpp

   1 /*\r
   2 * Copyright (c) 2011 Sveriges Television AB <info@casparcg.com>\r
   3 *\r
   4 * This file is part of CasparCG (www.casparcg.com).\r
   5 *\r
   6 * CasparCG is free software: you can redistribute it and/or modify\r
   7 * it under the terms of the GNU General Public License as published by\r
   8 * the Free Software Foundation, either version 3 of the License, or\r
   9 * (at your option) any later version.\r
  10 *\r
  11 * CasparCG is distributed in the hope that it will be useful,\r
  12 * but WITHOUT ANY WARRANTY; without even the implied warranty of\r
  13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\r
  14 * GNU General Public License for more details.\r
  15 *\r
  16 * You should have received a copy of the GNU General Public License\r
  17 * along with CasparCG. If not, see <http://www.gnu.org/licenses/>.\r
  18 *\r
  19 * Author: Robert Nagy, ronag89@gmail.com\r
  20 */\r
  21 \r
  22 #include "ogl_consumer.h"\r
  23 \r
  24 #include <GL/glew.h>\r
  25 #include <SFML/Window.hpp>\r
  26 \r
  27 #include <common/diagnostics/graph.h>\r
  28 #include <common/gl/gl_check.h>\r
  29 #include <common/log/log.h>\r
  30 #include <common/memory/safe_ptr.h>\r
  31 #include <common/memory/memcpy.h>\r
  32 #include <common/memory/memshfl.h>\r
  33 #include <common/utility/timer.h>\r
  34 #include <common/utility/string.h>\r
  35 \r
  36 #include <ffmpeg/producer/filter/filter.h>\r
  37 \r
  38 #include <core/video_format.h>\r
  39 #include <core/mixer/read_frame.h>\r
  40 #include <core/consumer/frame_consumer.h>\r
  41 \r
  42 #include <boost/timer.hpp>\r
  43 #include <boost/circular_buffer.hpp>\r
  44 #include <boost/foreach.hpp>\r
  45 #include <boost/thread.hpp>\r
  46 #include <boost/property_tree/ptree.hpp>\r
  47 \r
  48 #include <tbb/atomic.h>\r
  49 #include <tbb/concurrent_queue.h>\r
  50 \r
  51 #include <boost/assign.hpp>\r
  52 \r
  53 #include <algorithm>\r
  54 #include <vector>\r
  55 \r
  56 #if defined(_MSC_VER)\r
  57 #pragma warning (push)\r
  58 #pragma warning (disable : 4244)\r
  59 #endif\r
  60 extern "C" \r
  61 {\r
  62         #define __STDC_CONSTANT_MACROS\r
  63         #define __STDC_LIMIT_MACROS\r
  64         #include <libavcodec/avcodec.h>\r
  65         #include <libavutil/imgutils.h>\r
  66 }\r
  67 #if defined(_MSC_VER)\r
  68 #pragma warning (pop)\r
  69 #endif\r
  70 \r
  71 namespace caspar { namespace ogl {\r
  72                 \r
  73 enum stretch\r
  74 {\r
  75         none,\r
  76         uniform,\r
  77         fill,\r
  78         uniform_to_fill\r
  79 };\r
  80 \r
  81 struct configuration\r
  82 {\r
  83         std::wstring    name;\r
  84         size_t                  screen_index;\r
  85         stretch                 stretch;\r
  86         bool                    windowed;\r
  87         bool                    auto_deinterlace;\r
  88         bool                    key_only;\r
  89 \r
  90         configuration()\r
  91                 : name(L"ogl")\r
  92                 , screen_index(0)\r
  93                 , stretch(fill)\r
  94                 , windowed(true)\r
  95                 , auto_deinterlace(true)\r
  96                 , key_only(false)\r
  97         {\r
  98         }\r
  99 };\r
 100 \r
 101 struct ogl_consumer : boost::noncopyable\r
 102 {               \r
 103         const configuration             config_;\r
 104         core::video_format_desc format_desc_;\r
 105         int                                             channel_index_;\r
 106 \r
 107         GLuint                                  texture_;\r
 108         std::vector<GLuint>             pbos_;\r
 109         \r
 110         float                                   width_;\r
 111         float                                   height_;        \r
 112         unsigned int                    screen_x_;\r
 113         unsigned int                    screen_y_;\r
 114         unsigned int                    screen_width_;\r
 115         unsigned int                    screen_height_;\r
 116         size_t                                  square_width_;\r
 117         size_t                                  square_height_;                         \r
 118         \r
 119         sf::Window                              window_;\r
 120         \r
 121         safe_ptr<diagnostics::graph>    graph_;\r
 122         boost::timer                                    perf_timer_;\r
 123         boost::timer                                    tick_timer_;\r
 124 \r
 125         tbb::concurrent_bounded_queue<safe_ptr<core::read_frame>>       frame_buffer_;\r
 126 \r
 127         boost::thread                   thread_;\r
 128         tbb::atomic<bool>               is_running_;\r
 129         \r
 130         ffmpeg::filter                  filter_;\r
 131 public:\r
 132         ogl_consumer(const configuration& config, const core::video_format_desc& format_desc, int channel_index) \r
 133                 : config_(config)\r
 134                 , format_desc_(format_desc)\r
 135                 , channel_index_(channel_index)\r
 136                 , texture_(0)\r
 137                 , pbos_(2, 0)   \r
 138                 , screen_width_(format_desc.width)\r
 139                 , screen_height_(format_desc.height)\r
 140                 , square_width_(format_desc.square_width)\r
 141                 , square_height_(format_desc.square_height)\r
 142                 , filter_(format_desc.field_mode == core::field_mode::progressive || !config.auto_deinterlace ? L"" : L"YADIF=0:-1", boost::assign::list_of(PIX_FMT_BGRA))\r
 143         {               \r
 144                 frame_buffer_.set_capacity(2);\r
 145                 \r
 146                 graph_->set_color("tick-time", diagnostics::color(0.0f, 0.6f, 0.9f));   \r
 147                 graph_->set_color("frame-time", diagnostics::color(0.1f, 1.0f, 0.1f));\r
 148                 graph_->set_color("dropped-frame", diagnostics::color(0.3f, 0.6f, 0.3f));\r
 149                 graph_->set_text(print());\r
 150                 diagnostics::register_graph(graph_);\r
 151                                                                         \r
 152                 DISPLAY_DEVICE d_device = {sizeof(d_device), 0};                        \r
 153                 std::vector<DISPLAY_DEVICE> displayDevices;\r
 154                 for(int n = 0; EnumDisplayDevices(NULL, n, &d_device, NULL); ++n)\r
 155                         displayDevices.push_back(d_device);\r
 156 \r
 157                 if(config_.screen_index >= displayDevices.size())\r
 158                         CASPAR_LOG(warning) << print() << L" Invalid screen-index: " << config_.screen_index;\r
 159                 \r
 160                 DEVMODE devmode = {};\r
 161                 if(!EnumDisplaySettings(displayDevices[config_.screen_index].DeviceName, ENUM_CURRENT_SETTINGS, &devmode))\r
 162                         CASPAR_LOG(warning) << print() << L" Could not find display settings for screen-index: " << config_.screen_index;\r
 163                 \r
 164                 screen_x_               = devmode.dmPosition.x;\r
 165                 screen_y_               = devmode.dmPosition.y;\r
 166                 screen_width_   = config_.windowed ? square_width_ : devmode.dmPelsWidth;\r
 167                 screen_height_  = config_.windowed ? square_height_ : devmode.dmPelsHeight;\r
 168                 \r
 169                 is_running_ = true;\r
 170                 thread_ = boost::thread([this]{run();});\r
 171         }\r
 172         \r
 173         ~ogl_consumer()\r
 174         {\r
 175                 is_running_ = false;\r
 176                 frame_buffer_.try_push(make_safe<core::read_frame>());\r
 177                 thread_.join();\r
 178         }\r
 179 \r
 180         void init()\r
 181         {\r
 182                 if(!GLEW_VERSION_2_1)\r
 183                         BOOST_THROW_EXCEPTION(not_supported() << msg_info("Missing OpenGL 2.1 support."));\r
 184 \r
 185                 window_.Create(sf::VideoMode(screen_width_, screen_height_, 32), narrow(print()), config_.windowed ? sf::Style::Resize | sf::Style::Close : sf::Style::Fullscreen);\r
 186                 window_.ShowMouseCursor(false);\r
 187                 window_.SetPosition(screen_x_, screen_y_);\r
 188                 window_.SetSize(screen_width_, screen_height_);\r
 189                 window_.SetActive();\r
 190                 GL(glEnable(GL_TEXTURE_2D));\r
 191                 GL(glDisable(GL_DEPTH_TEST));           \r
 192                 GL(glClearColor(0.0, 0.0, 0.0, 0.0));\r
 193                 GL(glViewport(0, 0, format_desc_.width, format_desc_.height));\r
 194                 GL(glLoadIdentity());\r
 195                                 \r
 196                 calculate_aspect();\r
 197                         \r
 198                 GL(glGenTextures(1, &texture_));\r
 199                 GL(glBindTexture(GL_TEXTURE_2D, texture_));\r
 200                 GL(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR));\r
 201                 GL(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR));\r
 202                 GL(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP));\r
 203                 GL(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP));\r
 204                 GL(glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, format_desc_.width, format_desc_.height, 0, GL_BGRA, GL_UNSIGNED_BYTE, 0));\r
 205                 GL(glBindTexture(GL_TEXTURE_2D, 0));\r
 206                                         \r
 207                 GL(glGenBuffers(2, pbos_.data()));\r
 208                         \r
 209                 glBindBufferARB(GL_PIXEL_UNPACK_BUFFER_ARB, pbos_[0]);\r
 210                 glBufferDataARB(GL_PIXEL_UNPACK_BUFFER_ARB, format_desc_.size, 0, GL_STREAM_DRAW_ARB);\r
 211                 glBindBufferARB(GL_PIXEL_UNPACK_BUFFER_ARB, pbos_[1]);\r
 212                 glBufferDataARB(GL_PIXEL_UNPACK_BUFFER_ARB, format_desc_.size, 0, GL_STREAM_DRAW_ARB);\r
 213                 glBindBufferARB(GL_PIXEL_UNPACK_BUFFER_ARB, 0);\r
 214 \r
 215                 CASPAR_LOG(info) << print() << " Successfully Initialized.";\r
 216         }\r
 217 \r
 218         void uninit()\r
 219         {               \r
 220                 if(texture_)\r
 221                         glDeleteTextures(1, &texture_);\r
 222 \r
 223                 BOOST_FOREACH(auto& pbo, pbos_)\r
 224                 {\r
 225                         if(pbo)\r
 226                                 glDeleteBuffers(1, &pbo);\r
 227                 }\r
 228         }\r
 229 \r
 230         void run()\r
 231         {\r
 232                 try\r
 233                 {\r
 234                         init();\r
 235 \r
 236                         while(is_running_)\r
 237                         {                       \r
 238                                 try\r
 239                                 {\r
 240 \r
 241                                         sf::Event e;            \r
 242                                         while(window_.GetEvent(e))\r
 243                                         {\r
 244                                                 if(e.Type == sf::Event::Resized)\r
 245                                                         calculate_aspect();\r
 246                                                 else if(e.Type == sf::Event::Closed)\r
 247                                                         is_running_ = false;\r
 248                                         }\r
 249                         \r
 250                                         safe_ptr<core::read_frame> frame;\r
 251                                         frame_buffer_.pop(frame);\r
 252                                         \r
 253                                         perf_timer_.restart();\r
 254                                         render(frame);\r
 255                                         graph_->set_value("frame-time", perf_timer_.elapsed()*format_desc_.fps*0.5);    \r
 256 \r
 257                                         window_.Display();\r
 258                                         \r
 259                                         graph_->set_value("tick-time", tick_timer_.elapsed()*format_desc_.fps*0.5);     \r
 260                                         tick_timer_.restart();\r
 261                                 }\r
 262                                 catch(...)\r
 263                                 {\r
 264                                         CASPAR_LOG_CURRENT_EXCEPTION();\r
 265                                         is_running_ = false;\r
 266                                 }\r
 267                         }\r
 268 \r
 269                         uninit();\r
 270                 }\r
 271                 catch(...)\r
 272                 {\r
 273                         CASPAR_LOG_CURRENT_EXCEPTION();\r
 274                 }\r
 275         }\r
 276         \r
 277         safe_ptr<AVFrame> get_av_frame()\r
 278         {               \r
 279                 safe_ptr<AVFrame> av_frame(avcodec_alloc_frame(), av_free);     \r
 280                 avcodec_get_frame_defaults(av_frame.get());\r
 281                                                 \r
 282                 av_frame->linesize[0]           = format_desc_.width*4;                 \r
 283                 av_frame->format                        = PIX_FMT_BGRA;\r
 284                 av_frame->width                         = format_desc_.width;\r
 285                 av_frame->height                        = format_desc_.height;\r
 286                 av_frame->interlaced_frame      = format_desc_.field_mode != core::field_mode::progressive;\r
 287                 av_frame->top_field_first       = format_desc_.field_mode == core::field_mode::upper ? 1 : 0;\r
 288 \r
 289                 return av_frame;\r
 290         }\r
 291 \r
 292         void render(const safe_ptr<core::read_frame>& frame)\r
 293         {                       \r
 294                 if(static_cast<size_t>(frame->image_data().size()) != format_desc_.size)\r
 295                         return;\r
 296                                         \r
 297                 auto av_frame = get_av_frame();\r
 298                 av_frame->data[0] = const_cast<uint8_t*>(frame->image_data().begin());\r
 299 \r
 300                 filter_.push(av_frame);\r
 301                 auto frames = filter_.poll_all();\r
 302 \r
 303                 if(frames.empty())\r
 304                         return;\r
 305 \r
 306                 av_frame = frames[0];\r
 307 \r
 308                 if(av_frame->linesize[0] != static_cast<int>(format_desc_.width*4))\r
 309                 {\r
 310                         const uint8_t *src_data[4] = {0};\r
 311                         memcpy(const_cast<uint8_t**>(&src_data[0]), av_frame->data, 4);\r
 312                         const int src_linesizes[4] = {0};\r
 313                         memcpy(const_cast<int*>(&src_linesizes[0]), av_frame->linesize, 4);\r
 314 \r
 315                         auto av_frame2 = get_av_frame();\r
 316                         av_image_alloc(av_frame2->data, av_frame2->linesize, av_frame2->width, av_frame2->height, PIX_FMT_BGRA, 16);\r
 317                         av_frame = safe_ptr<AVFrame>(av_frame2.get(), [=](AVFrame*)\r
 318                         {\r
 319                                 av_freep(&av_frame2->data[0]);\r
 320                         });\r
 321 \r
 322                         av_image_copy(av_frame2->data, av_frame2->linesize, src_data, src_linesizes, PIX_FMT_BGRA, av_frame2->width, av_frame2->height);\r
 323                 }\r
 324 \r
 325                 glBindTexture(GL_TEXTURE_2D, texture_);\r
 326 \r
 327                 glBindBuffer(GL_PIXEL_UNPACK_BUFFER, pbos_[0]);\r
 328                 glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, format_desc_.width, format_desc_.height, GL_BGRA, GL_UNSIGNED_BYTE, 0);\r
 329 \r
 330                 glBindBuffer(GL_PIXEL_UNPACK_BUFFER, pbos_[1]);\r
 331                 glBufferData(GL_PIXEL_UNPACK_BUFFER, format_desc_.size, 0, GL_STREAM_DRAW);\r
 332 \r
 333                 auto ptr = glMapBuffer(GL_PIXEL_UNPACK_BUFFER, GL_WRITE_ONLY);\r
 334                 if(ptr)\r
 335                 {\r
 336                         if(config_.key_only)\r
 337                                 fast_memshfl(reinterpret_cast<char*>(ptr), av_frame->data[0], frame->image_data().size(), 0x0F0F0F0F, 0x0B0B0B0B, 0x07070707, 0x03030303);\r
 338                         else\r
 339                                 fast_memcpy(reinterpret_cast<char*>(ptr), av_frame->data[0], frame->image_data().size());\r
 340 \r
 341                         glUnmapBuffer(GL_PIXEL_UNPACK_BUFFER); // release the mapped buffer\r
 342                 }\r
 343 \r
 344                 glBindBuffer(GL_PIXEL_UNPACK_BUFFER, 0);\r
 345                                 \r
 346                 GL(glClear(GL_COLOR_BUFFER_BIT));                       \r
 347                 glBegin(GL_QUADS);\r
 348                                 glTexCoord2f(0.0f,        1.0f);        glVertex2f(-width_, -height_);\r
 349                                 glTexCoord2f(1.0f,        1.0f);        glVertex2f( width_, -height_);\r
 350                                 glTexCoord2f(1.0f,        0.0f);        glVertex2f( width_,  height_);\r
 351                                 glTexCoord2f(0.0f,        0.0f);        glVertex2f(-width_,  height_);\r
 352                 glEnd();\r
 353                 \r
 354                 glBindTexture(GL_TEXTURE_2D, 0);\r
 355 \r
 356                 std::rotate(pbos_.begin(), pbos_.begin() + 1, pbos_.end());\r
 357         }\r
 358 \r
 359         bool send(const safe_ptr<core::read_frame>& frame)\r
 360         {\r
 361                 if(!frame_buffer_.try_push(frame))\r
 362                         graph_->set_tag("dropped-frame");\r
 363                 return is_running_;\r
 364         }\r
 365                 \r
 366         std::wstring print() const\r
 367         {       \r
 368                 return config_.name + L"[" + boost::lexical_cast<std::wstring>(channel_index_) + L"|" + format_desc_.name + L"]";\r
 369         }\r
 370         \r
 371         void calculate_aspect()\r
 372         {\r
 373                 if(config_.windowed)\r
 374                 {\r
 375                         screen_height_ = window_.GetHeight();\r
 376                         screen_width_ = window_.GetWidth();\r
 377                 }\r
 378                 \r
 379                 GL(glViewport(0, 0, screen_width_, screen_height_));\r
 380 \r
 381                 std::pair<float, float> target_ratio = None();\r
 382                 if(config_.stretch == fill)\r
 383                         target_ratio = Fill();\r
 384                 else if(config_.stretch == uniform)\r
 385                         target_ratio = Uniform();\r
 386                 else if(config_.stretch == uniform_to_fill)\r
 387                         target_ratio = UniformToFill();\r
 388 \r
 389                 width_ = target_ratio.first;\r
 390                 height_ = target_ratio.second;\r
 391         }\r
 392                 \r
 393         std::pair<float, float> None()\r
 394         {\r
 395                 float width = static_cast<float>(square_width_)/static_cast<float>(screen_width_);\r
 396                 float height = static_cast<float>(square_height_)/static_cast<float>(screen_height_);\r
 397 \r
 398                 return std::make_pair(width, height);\r
 399         }\r
 400 \r
 401         std::pair<float, float> Uniform()\r
 402         {\r
 403                 float aspect = static_cast<float>(square_width_)/static_cast<float>(square_height_);\r
 404                 float width = std::min(1.0f, static_cast<float>(screen_height_)*aspect/static_cast<float>(screen_width_));\r
 405                 float height = static_cast<float>(screen_width_*width)/static_cast<float>(screen_height_*aspect);\r
 406 \r
 407                 return std::make_pair(width, height);\r
 408         }\r
 409 \r
 410         std::pair<float, float> Fill()\r
 411         {\r
 412                 return std::make_pair(1.0f, 1.0f);\r
 413         }\r
 414 \r
 415         std::pair<float, float> UniformToFill()\r
 416         {\r
 417                 float wr = static_cast<float>(square_width_)/static_cast<float>(screen_width_);\r
 418                 float hr = static_cast<float>(square_height_)/static_cast<float>(screen_height_);\r
 419                 float r_inv = 1.0f/std::min(wr, hr);\r
 420 \r
 421                 float width = wr*r_inv;\r
 422                 float height = hr*r_inv;\r
 423 \r
 424                 return std::make_pair(width, height);\r
 425         }\r
 426 };\r
 427 \r
 428 \r
 429 struct ogl_consumer_proxy : public core::frame_consumer\r
 430 {\r
 431         const configuration config_;\r
 432         std::unique_ptr<ogl_consumer> consumer_;\r
 433 \r
 434 public:\r
 435 \r
 436         ogl_consumer_proxy(const configuration& config)\r
 437                 : config_(config){}\r
 438         \r
 439         ~ogl_consumer_proxy()\r
 440         {\r
 441                 if(consumer_)\r
 442                 {\r
 443                         auto str = print();\r
 444                         consumer_.reset();\r
 445                         CASPAR_LOG(info) << str << L" Successfully Uninitialized.";     \r
 446                 }\r
 447         }\r
 448 \r
 449         // frame_consumer\r
 450 \r
 451         virtual void initialize(const core::video_format_desc& format_desc, int channel_index) override\r
 452         {\r
 453                 consumer_.reset();\r
 454                 consumer_.reset(new ogl_consumer(config_, format_desc, channel_index));\r
 455                 CASPAR_LOG(info) << print() << L" Successfully Initialized.";   \r
 456         }\r
 457         \r
 458         virtual bool send(const safe_ptr<core::read_frame>& frame) override\r
 459         {\r
 460                 return consumer_->send(frame);\r
 461         }\r
 462         \r
 463         virtual std::wstring print() const override\r
 464         {\r
 465                 return consumer_ ? consumer_->print() : L"[ogl_consumer]";\r
 466         }\r
 467 \r
 468         virtual boost::property_tree::wptree info() const override\r
 469         {\r
 470                 boost::property_tree::wptree info;\r
 471                 info.add(L"type", L"ogl-consumer");\r
 472                 info.add(L"key-only", config_.key_only);\r
 473                 info.add(L"windowed", config_.windowed);\r
 474                 info.add(L"auto-deinterlace", config_.auto_deinterlace);\r
 475                 return info;\r
 476         }\r
 477 \r
 478         virtual bool has_synchronization_clock() const override\r
 479         {\r
 480                 return false;\r
 481         }\r
 482         \r
 483         virtual size_t buffer_depth() const override\r
 484         {\r
 485                 return 1;\r
 486         }\r
 487 \r
 488         virtual int index() const override\r
 489         {\r
 490                 return 600;\r
 491         }\r
 492 };      \r
 493 \r
 494 safe_ptr<core::frame_consumer> create_consumer(const std::vector<std::wstring>& params)\r
 495 {\r
 496         if(params.size() < 1 || params[0] != L"SCREEN")\r
 497                 return core::frame_consumer::empty();\r
 498         \r
 499         configuration config;\r
 500                 \r
 501         auto device_it = std::find(params.begin(), params.end(), L"DEVICE");\r
 502         if(device_it != params.end() && ++device_it != params.end())\r
 503                 config.screen_index = boost::lexical_cast<int>(*device_it);\r
 504                 \r
 505         config.key_only = std::find(params.begin(), params.end(), L"WINDOWED") != params.end();\r
 506         config.key_only = std::find(params.begin(), params.end(), L"KEY_ONLY") != params.end();\r
 507 \r
 508         auto name_it    = std::find(params.begin(), params.end(), L"NAME");\r
 509         if(name_it != params.end() && ++name_it != params.end())\r
 510                 config.name = *name_it;\r
 511 \r
 512         return make_safe<ogl_consumer_proxy>(config);\r
 513 }\r
 514 \r
 515 safe_ptr<core::frame_consumer> create_consumer(const boost::property_tree::wptree& ptree) \r
 516 {\r
 517         configuration config;\r
 518         config.name                             = ptree.get(L"name",     config.name);\r
 519         config.screen_index             = ptree.get(L"device",   config.screen_index+1)-1;\r
 520         config.windowed                 = ptree.get(L"windowed", config.windowed);\r
 521         config.key_only                 = ptree.get(L"key-only", config.key_only);\r
 522         config.auto_deinterlace = ptree.get(L"auto-deinterlace", config.auto_deinterlace);\r
 523         \r
 524         auto stretch_str = ptree.get(L"stretch", L"default");\r
 525         if(stretch_str == L"uniform")\r
 526                 config.stretch = stretch::uniform;\r
 527         else if(stretch_str == L"uniform_to_fill")\r
 528                 config.stretch = stretch::uniform_to_fill;\r
 529         \r
 530         return make_safe<ogl_consumer_proxy>(config);\r
 531 }\r
 532 \r
 533 }}