2 * copyright (c) 2010 Sveriges Television AB <info@casparcg.com>
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4 * This file is part of CasparCG.
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6 * CasparCG is free software: you can redistribute it and/or modify
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7 * it under the terms of the GNU General Public License as published by
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8 * the Free Software Foundation, either version 3 of the License, or
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9 * (at your option) any later version.
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11 * CasparCG is distributed in the hope that it will be useful,
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12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 * GNU General Public License for more details.
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16 * You should have received a copy of the GNU General Public License
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17 * along with CasparCG. If not, see <http://www.gnu.org/licenses/>.
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23 #include <windows.h>
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25 #include <SFML/Window.hpp>
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27 #include "ogl_consumer.h"
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29 #include <core/video_format.h>
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30 #include <core/consumer/frame/read_frame.h>
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32 #include <common/gl/gl_check.h>
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33 #include <common/concurrency/executor.h>
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34 #include <common/memory/safe_ptr.h>
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35 #include <common/diagnostics/graph.h>
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36 #include <common/utility/timer.h>
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38 #include <boost/thread.hpp>
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40 #include <algorithm>
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45 struct ogl_consumer::implementation : boost::noncopyable
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48 printer parent_printer_;
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49 boost::unique_future<void> active_;
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55 std::array<GLuint, 2> pbos_;
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57 const bool windowed_;
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58 unsigned int screen_width_;
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59 unsigned int screen_height_;
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60 const unsigned int screen_index_;
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62 const stretch stretch_;
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63 core::video_format_desc format_desc_;
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67 safe_ptr<diagnostics::graph> graph_;
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70 size_t square_width_;
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71 size_t square_height_;
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75 implementation(unsigned int screen_index, stretch stretch, bool windowed)
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77 , windowed_(windowed)
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79 , screen_index_(screen_index)
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80 , graph_(diagnostics::create_graph(narrow(print())))
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81 , executor_(print())
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83 graph_->add_guide("frame-time", 0.5);
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84 graph_->set_color("frame-time", diagnostics::color(1.0f, 0.0f, 0.0f));
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89 CASPAR_LOG(info) << print() << L" Shutting down.";
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92 void initialize(const core::video_format_desc& format_desc, const printer& parent_printer)
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94 if(!GLEE_VERSION_2_1)
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95 BOOST_THROW_EXCEPTION(not_supported() << msg_info("Missing OpenGL 2.1 support."));
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97 format_desc_ = format_desc;
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98 parent_printer_ = parent_printer;
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100 square_width_ = format_desc_.width;
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101 square_height_ = format_desc_.height;
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103 if(format_desc_.format == core::video_format::pal)
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105 square_width_ = 768;
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106 square_height_ = 576;
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108 else if(format_desc_.format == core::video_format::ntsc)
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110 square_width_ = 720;
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111 square_height_ = 547;
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114 screen_width_ = format_desc.width;
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115 screen_height_ = format_desc.height;
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117 DISPLAY_DEVICE d_device;
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118 memset(&d_device, 0, sizeof(d_device));
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119 d_device.cb = sizeof(d_device);
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121 std::vector<DISPLAY_DEVICE> displayDevices;
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122 for(int n = 0; EnumDisplayDevices(NULL, n, &d_device, NULL); ++n)
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124 displayDevices.push_back(d_device);
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125 memset(&d_device, 0, sizeof(d_device));
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126 d_device.cb = sizeof(d_device);
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129 if(screen_index_ >= displayDevices.size())
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130 BOOST_THROW_EXCEPTION(out_of_range() << arg_name_info("screen_index_") << msg_info(narrow(print())));
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133 memset(&devmode, 0, sizeof(devmode));
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135 if(!EnumDisplaySettings(displayDevices[screen_index_].DeviceName, ENUM_CURRENT_SETTINGS, &devmode))
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136 BOOST_THROW_EXCEPTION(invalid_operation() << arg_name_info("screen_index") << msg_info(narrow(print()) + " EnumDisplaySettings"));
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138 screen_width_ = windowed_ ? square_width_ : devmode.dmPelsWidth;
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139 screen_height_ = windowed_ ? square_height_ : devmode.dmPelsHeight;
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142 BOOST_THROW_EXCEPTION(not_supported() << msg_info(narrow(print() + " doesn't support non-Win32 fullscreen"));
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144 if(screen_index != 0)
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145 CASPAR_LOG(warning) << print() << " only supports screen_index=0 for non-Win32";
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148 executor_.invoke([=]
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150 window_.Create(sf::VideoMode(screen_width_, screen_height_, 32), narrow(print()), windowed_ ? sf::Style::Resize : sf::Style::Fullscreen);
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151 window_.ShowMouseCursor(false);
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152 window_.SetPosition(devmode.dmPosition.x, devmode.dmPosition.y);
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153 window_.SetSize(screen_width_, screen_height_);
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154 window_.SetActive();
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155 GL(glEnable(GL_TEXTURE_2D));
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156 GL(glDisable(GL_DEPTH_TEST));
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157 GL(glClearColor(0.0, 0.0, 0.0, 0.0));
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158 GL(glViewport(0, 0, format_desc_.width, format_desc_.height));
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161 calculate_aspect();
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163 glGenTextures(1, &texture_);
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164 glBindTexture(GL_TEXTURE_2D, texture_);
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165 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
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166 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
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167 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
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168 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);
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169 glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, format_desc_.width, format_desc_.height, 0, GL_BGRA, GL_UNSIGNED_BYTE, 0);
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170 glBindTexture(GL_TEXTURE_2D, 0);
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172 GL(glGenBuffers(2, pbos_.data()));
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174 glBindBufferARB(GL_PIXEL_UNPACK_BUFFER_ARB, pbos_[0]);
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175 glBufferDataARB(GL_PIXEL_UNPACK_BUFFER_ARB, format_desc_.size, 0, GL_STREAM_DRAW_ARB);
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176 glBindBufferARB(GL_PIXEL_UNPACK_BUFFER_ARB, pbos_[1]);
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177 glBufferDataARB(GL_PIXEL_UNPACK_BUFFER_ARB, format_desc_.size, 0, GL_STREAM_DRAW_ARB);
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178 glBindBufferARB(GL_PIXEL_UNPACK_BUFFER_ARB, 0);
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180 active_ = executor_.begin_invoke([]{});
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181 CASPAR_LOG(info) << print() << " Sucessfully initialized.";
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184 void calculate_aspect()
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188 screen_height_ = window_.GetHeight();
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189 screen_width_ = window_.GetWidth();
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192 GL(glViewport(0, 0, screen_width_, screen_height_));
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194 std::pair<float, float> target_ratio = None();
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195 if(stretch_ == fill)
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196 target_ratio = Fill();
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197 else if(stretch_ == uniform)
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198 target_ratio = Uniform();
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199 else if(stretch_ == uniform_to_fill)
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200 target_ratio = UniformToFill();
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202 width_ = target_ratio.first;
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203 height_ = target_ratio.second;
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206 std::pair<float, float> None()
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208 float width = static_cast<float>(square_width_)/static_cast<float>(screen_width_);
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209 float height = static_cast<float>(square_height_)/static_cast<float>(screen_height_);
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211 return std::make_pair(width, height);
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214 std::pair<float, float> Uniform()
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216 float aspect = static_cast<float>(square_width_)/static_cast<float>(square_height_);
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217 float width = std::min(1.0f, static_cast<float>(screen_height_)*aspect/static_cast<float>(screen_width_));
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218 float height = static_cast<float>(screen_width_*width)/static_cast<float>(screen_height_*aspect);
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220 return std::make_pair(width, height);
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223 std::pair<float, float> Fill()
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225 return std::make_pair(1.0f, 1.0f);
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228 std::pair<float, float> UniformToFill()
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230 float wr = static_cast<float>(square_width_)/static_cast<float>(screen_width_);
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231 float hr = static_cast<float>(square_height_)/static_cast<float>(screen_height_);
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232 float r_inv = 1.0f/std::min(wr, hr);
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234 float width = wr*r_inv;
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235 float height = hr*r_inv;
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237 return std::make_pair(width, height);
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240 void render(const safe_ptr<const core::read_frame>& frame)
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242 glBindTexture(GL_TEXTURE_2D, texture_);
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243 glBindBuffer(GL_PIXEL_UNPACK_BUFFER, pbos_[0]);
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245 glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, format_desc_.width, format_desc_.height, GL_BGRA, GL_UNSIGNED_BYTE, 0);
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247 glBindBuffer(GL_PIXEL_UNPACK_BUFFER, pbos_[1]);
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249 glBufferData(GL_PIXEL_UNPACK_BUFFER, format_desc_.size, 0, GL_STREAM_DRAW);
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251 auto ptr = glMapBuffer(GL_PIXEL_UNPACK_BUFFER, GL_WRITE_ONLY);
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254 std::copy(frame->image_data().begin(), frame->image_data().end(), reinterpret_cast<char*>(ptr));
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255 glUnmapBuffer(GL_PIXEL_UNPACK_BUFFER); // release the mapped buffer
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258 glBindBuffer(GL_PIXEL_UNPACK_BUFFER, 0);
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260 GL(glClear(GL_COLOR_BUFFER_BIT));
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262 glTexCoord2f(0.0f, 1.0f); glVertex2f(-width_, -height_);
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263 glTexCoord2f(1.0f, 1.0f); glVertex2f( width_, -height_);
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264 glTexCoord2f(1.0f, 0.0f); glVertex2f( width_, height_);
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265 glTexCoord2f(0.0f, 0.0f); glVertex2f(-width_, height_);
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268 glBindTexture(GL_TEXTURE_2D, 0);
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270 std::rotate(pbos_.begin(), pbos_.begin() + 1, pbos_.end());
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272 clock_.tick(1.0/format_desc_.fps);
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275 void send(const safe_ptr<const core::read_frame>& frame)
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278 active_ = executor_.begin_invoke([=]
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280 perf_timer_.reset();
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282 while(window_.GetEvent(e))
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284 if(e.Type == sf::Event::Resized)
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285 calculate_aspect();
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289 graph_->update_value("frame-time", static_cast<float>(perf_timer_.elapsed()/format_desc_.interval*0.5));
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293 std::wstring print() const
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295 return (parent_printer_ ? parent_printer_() + L"/" : L"") + L"ogl[" + boost::lexical_cast<std::wstring>(screen_index_) + L"]";
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298 size_t buffer_depth() const{return 2;}
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301 ogl_consumer::ogl_consumer(ogl_consumer&& other) : impl_(std::move(other.impl_)){}
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302 ogl_consumer::ogl_consumer(unsigned int screen_index, stretch stretch, bool windowed) : impl_(new implementation(screen_index, stretch, windowed)){}
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303 void ogl_consumer::send(const safe_ptr<const core::read_frame>& frame){impl_->send(frame);}
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304 size_t ogl_consumer::buffer_depth() const{return impl_->buffer_depth();}
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305 void ogl_consumer::initialize(const core::video_format_desc& format_desc, const printer& parent_printer){impl_->initialize(format_desc, parent_printer);}
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306 std::wstring ogl_consumer::print() const {return impl_->print();}
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308 safe_ptr<core::frame_consumer> create_ogl_consumer(const std::vector<std::wstring>& params)
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310 if(params.size() < 1 || params[0] != L"OGL")
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311 return core::frame_consumer::empty();
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313 unsigned int screen_index = 0;
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314 stretch stretch = stretch::fill;
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315 bool windowed = true;
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317 if(params.size() > 1)
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318 screen_index = lexical_cast_or_default<int>(params[2], screen_index);
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320 if(params.size() > 2)
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321 windowed = lexical_cast_or_default<bool>(params[3], windowed);
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323 return make_safe<ogl_consumer>(screen_index, stretch, windowed);
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