git.sesse.net Git - casparcg/blob - accelerator/ogl/context.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 // TODO: Smart GC\r
  23 \r
  24 #include "../stdafx.h"\r
  25 \r
  26 #include "context.h"\r
  27 \r
  28 #include "shader.h"\r
  29 \r
  30 #include <common/except.h>\r
  31 #include <common/assert.h>\r
  32 #include <common/gl/gl_check.h>\r
  33 \r
  34 #include <boost/foreach.hpp>\r
  35 \r
  36 #include <gl/glew.h>\r
  37 \r
  38 namespace caspar { namespace accelerator { namespace ogl {\r
  39 \r
  40 context::context() \r
  41         : executor_(L"context")\r
  42 {\r
  43         CASPAR_LOG(info) << L"Initializing OpenGL Device.";\r
  44                 \r
  45         invoke([=]\r
  46         {\r
  47                 context_.reset(new sf::Context());\r
  48                 context_->SetActive(true);\r
  49                 \r
  50                 if (glewInit() != GLEW_OK)\r
  51                         BOOST_THROW_EXCEPTION(gl::ogl_exception() << msg_info("Failed to initialize GLEW."));\r
  52                                                 \r
  53                 CASPAR_LOG(info) << L"OpenGL " << version();\r
  54 \r
  55                 if(!GLEW_VERSION_3_0)\r
  56                         BOOST_THROW_EXCEPTION(gl::ogl_exception() << msg_info("Your graphics card does not meet the minimum hardware requirements since it does not support OpenGL 3.0 or higher. CasparCG Server will not be able to continue."));\r
  57         \r
  58                 glGenFramebuffers(1, &fbo_);    \r
  59                 \r
  60                 CASPAR_LOG(info) << L"Successfully initialized OpenGL Device.";\r
  61         });\r
  62 }\r
  63 \r
  64 context::~context()\r
  65 {\r
  66         invoke([=]\r
  67         {\r
  68                 BOOST_FOREACH(auto& pool, device_pools_)\r
  69                         pool.clear();\r
  70                 BOOST_FOREACH(auto& pool, host_pools_)\r
  71                         pool.clear();\r
  72                 glDeleteFramebuffers(1, &fbo_);\r
  73         });\r
  74 }\r
  75 \r
  76 spl::shared_ptr<device_buffer> context::allocate_device_buffer(int width, int height, int stride)\r
  77 {\r
  78         std::shared_ptr<device_buffer> buffer;\r
  79         try\r
  80         {\r
  81                 buffer.reset(new device_buffer(shared_from_this(), width, height, stride));\r
  82         }\r
  83         catch(...)\r
  84         {\r
  85                 try\r
  86                 {\r
  87                         executor_.yield();\r
  88                         gc().wait();\r
  89                                         \r
  90                         // Try again\r
  91                         buffer.reset(new device_buffer(shared_from_this(), width, height, stride));\r
  92                 }\r
  93                 catch(...)\r
  94                 {\r
  95                         CASPAR_LOG(error) << L"ogl: create_device_buffer failed!";\r
  96                         throw;\r
  97                 }\r
  98         }\r
  99         return spl::make_shared_ptr(buffer);\r
 100 }\r
 101                                 \r
 102 spl::shared_ptr<device_buffer> context::create_device_buffer(int width, int height, int stride)\r
 103 {\r
 104         CASPAR_VERIFY(stride > 0 && stride < 5);\r
 105         CASPAR_VERIFY(width > 0 && height > 0);\r
 106         auto& pool = device_pools_[stride-1][((width << 16) & 0xFFFF0000) | (height & 0x0000FFFF)];\r
 107         std::shared_ptr<device_buffer> buffer;\r
 108         if(!pool->items.try_pop(buffer))                \r
 109                 buffer = executor_.invoke([&]{return allocate_device_buffer(width, height, stride);}, task_priority::high_priority);                    \r
 110         \r
 111         //++pool->usage_count;\r
 112 \r
 113         return spl::shared_ptr<device_buffer>(buffer.get(), [=](device_buffer*) mutable\r
 114         {               \r
 115                 pool->items.push(buffer);       \r
 116         });\r
 117 }\r
 118 \r
 119 spl::shared_ptr<host_buffer> context::allocate_host_buffer(int size, host_buffer::usage usage)\r
 120 {\r
 121         std::shared_ptr<host_buffer> buffer;\r
 122 \r
 123         try\r
 124         {\r
 125                 buffer.reset(new host_buffer(shared_from_this(), size, usage));\r
 126                 if(usage == host_buffer::usage::write_only)\r
 127                         buffer->map();\r
 128                 else\r
 129                         buffer->unmap();                        \r
 130         }\r
 131         catch(...)\r
 132         {\r
 133                 try\r
 134                 {\r
 135                         executor_.yield();\r
 136                         gc().wait();\r
 137 \r
 138                         // Try again\r
 139                         buffer.reset(new host_buffer(shared_from_this(), size, usage));\r
 140                         if(usage == host_buffer::usage::write_only)\r
 141                                 buffer->map();\r
 142                         else\r
 143                                 buffer->unmap();        \r
 144                 }\r
 145                 catch(...)\r
 146                 {\r
 147                         CASPAR_LOG(error) << L"ogl: create_host_buffer failed!";\r
 148                         throw;          \r
 149                 }\r
 150         }\r
 151 \r
 152         return spl::make_shared_ptr(buffer);\r
 153 }\r
 154         \r
 155 spl::shared_ptr<host_buffer> context::create_host_buffer(int size, host_buffer::usage usage)\r
 156 {\r
 157         CASPAR_VERIFY(usage == host_buffer::usage::write_only || usage == host_buffer::usage::read_only);\r
 158         CASPAR_VERIFY(size > 0);\r
 159         auto& pool = host_pools_[usage.value()][size];\r
 160         std::shared_ptr<host_buffer> buffer;\r
 161         if(!pool->items.try_pop(buffer))        \r
 162                 buffer = executor_.invoke([=]{return allocate_host_buffer(size, usage);}, task_priority::high_priority);        \r
 163         \r
 164         auto self = shared_from_this();\r
 165         bool is_write_only      = (usage == host_buffer::usage::write_only);\r
 166         return spl::shared_ptr<host_buffer>(buffer.get(), [=](host_buffer*) mutable\r
 167         {\r
 168                 self->executor_.begin_invoke([=]() mutable\r
 169                 {               \r
 170                         if(is_write_only)\r
 171                                 buffer->map();\r
 172                         else\r
 173                                 buffer->unmap();\r
 174 \r
 175                         pool->items.push(buffer);\r
 176                 }, task_priority::high_priority);       \r
 177         });\r
 178 }\r
 179 \r
 180 spl::shared_ptr<context> context::create()\r
 181 {\r
 182         return spl::shared_ptr<context>(new context());\r
 183 }\r
 184 \r
 185 //template<typename T>\r
 186 //void flush_pool(buffer_pool<T>& pool)\r
 187 //{     \r
 188 //      if(pool.flush_count.fetch_and_increment() < 16)\r
 189 //              return;\r
 190 //\r
 191 //      if(pool.usage_count.fetch_and_store(0) < pool.items.size())\r
 192 //      {\r
 193 //              std::shared_ptr<T> buffer;\r
 194 //              pool.items.try_pop(buffer);\r
 195 //      }\r
 196 //\r
 197 //      pool.flush_count = 0;\r
 198 //      pool.usage_count = 0;\r
 199 //}\r
 200 \r
 201 boost::unique_future<void> context::gc()\r
 202 {       \r
 203         return begin_invoke([=]\r
 204         {\r
 205                 CASPAR_LOG(info) << " ogl: Running GC.";                \r
 206         \r
 207                 try\r
 208                 {\r
 209                         BOOST_FOREACH(auto& pools, device_pools_)\r
 210                         {\r
 211                                 BOOST_FOREACH(auto& pool, pools)\r
 212                                         pool.second->items.clear();\r
 213                         }\r
 214                         BOOST_FOREACH(auto& pools, host_pools_)\r
 215                         {\r
 216                                 BOOST_FOREACH(auto& pool, pools)\r
 217                                         pool.second->items.clear();\r
 218                         }\r
 219                 }\r
 220                 catch(...)\r
 221                 {\r
 222                         CASPAR_LOG_CURRENT_EXCEPTION();\r
 223                 }\r
 224         }, task_priority::high_priority);\r
 225 }\r
 226 \r
 227 std::wstring context::version()\r
 228 {       \r
 229         static std::wstring ver = L"Not found";\r
 230         try\r
 231         {\r
 232                 ver = u16(invoke([]{return std::string(reinterpret_cast<const char*>(glGetString(GL_VERSION)));})\r
 233                 + " "   + invoke([]{return std::string(reinterpret_cast<const char*>(glGetString(GL_VENDOR)));}));                      \r
 234         }\r
 235         catch(...){}\r
 236 \r
 237         return ver;\r
 238 }\r
 239 \r
 240 void context::attach(device_buffer& texture)\r
 241 {       \r
 242         glBindFramebuffer(GL_FRAMEBUFFER, fbo_);\r
 243         GL(glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0 + 0, GL_TEXTURE_2D, texture.id(), 0));\r
 244 }\r
 245 \r
 246 void context::clear(device_buffer& texture)\r
 247 {       \r
 248         attach(texture);\r
 249         GL(glClear(GL_COLOR_BUFFER_BIT));\r
 250 }\r
 251 \r
 252 void context::use(shader& shader)\r
 253 {       \r
 254         GL(glUseProgramObjectARB(shader.id())); \r
 255 }\r
 256 \r
 257 boost::unique_future<spl::shared_ptr<device_buffer>> context::copy_async(spl::shared_ptr<host_buffer>& source, int width, int height, int stride)\r
 258 {\r
 259         return executor_.begin_invoke([=]() -> spl::shared_ptr<device_buffer>\r
 260         {\r
 261                 auto result = create_device_buffer(width, height, stride);\r
 262                 result->copy_from(source);\r
 263                 return result;\r
 264         }, task_priority::high_priority);\r
 265 }
 266
 267 void context::yield()\r
 268 {\r
 269         executor_.yield(task_priority::high_priority);\r
 270 }\r
 271 \r
 272 }}}\r
 273 \r
 274 \r