git.sesse.net Git - casparcg/blob - core/mixer/gpu/ogl_device.cpp

   1 /*\r
   2 * copyright (c) 2010 Sveriges Television AB <info@casparcg.com>\r
   3 *\r
   4 *  This file is part of CasparCG.\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 */\r
  20 // TODO: Smart GC\r
  21 \r
  22 #include "../../stdafx.h"\r
  23 \r
  24 #include "ogl_device.h"\r
  25 \r
  26 #include "shader.h"\r
  27 \r
  28 #include <common/exception/exceptions.h>\r
  29 #include <common/utility/assert.h>\r
  30 #include <common/gl/gl_check.h>\r
  31 \r
  32 #include <boost/foreach.hpp>\r
  33 \r
  34 #include <gl/glew.h>\r
  35 \r
  36 namespace caspar { namespace core {\r
  37 \r
  38 ogl_device::ogl_device() \r
  39         : executor_(L"ogl_device")\r
  40         , pattern_(nullptr)\r
  41         , attached_texture_(0)\r
  42         , active_shader_(0)\r
  43 {\r
  44         std::fill(binded_textures_.begin(), binded_textures_.end(), 0);\r
  45         std::fill(viewport_.begin(), viewport_.end(), 0);\r
  46         std::fill(scissor_.begin(), scissor_.end(), 0);\r
  47         \r
  48         invoke([=]\r
  49         {\r
  50                 context_.reset(new sf::Context());\r
  51                 context_->SetActive(true);\r
  52                 \r
  53                 if (glewInit() != GLEW_OK)\r
  54                         BOOST_THROW_EXCEPTION(gl::ogl_exception() << msg_info("Failed to initialize GLEW."));\r
  55                                 \r
  56                 if(!GLEW_VERSION_3_2)\r
  57                         CASPAR_LOG(warning) << "Missing OpenGL 3.2 support.";\r
  58         \r
  59                 GL(glGenFramebuffers(1, &fbo_));                \r
  60                 GL(glBindFramebuffer(GL_FRAMEBUFFER_EXT, fbo_));\r
  61                 GL(glReadBuffer(GL_COLOR_ATTACHMENT0_EXT));\r
  62         GL(glDisable(GL_MULTISAMPLE_ARB));\r
  63         });\r
  64 }\r
  65 \r
  66 ogl_device::~ogl_device()\r
  67 {\r
  68         invoke([=]\r
  69         {\r
  70                 BOOST_FOREACH(auto& pool, device_pools_)\r
  71                         pool.clear();\r
  72                 BOOST_FOREACH(auto& pool, host_pools_)\r
  73                         pool.clear();\r
  74                 glDeleteFramebuffersEXT(1, &fbo_);\r
  75         });\r
  76 }\r
  77                                 \r
  78 safe_ptr<device_buffer> ogl_device::create_device_buffer(size_t width, size_t height, size_t stride)\r
  79 {\r
  80         CASPAR_VERIFY(stride > 0 && stride < 5);\r
  81         CASPAR_VERIFY(width > 0 && height > 0);\r
  82         auto& pool = device_pools_[stride-1][((width << 16) & 0xFFFF0000) | (height & 0x0000FFFF)];\r
  83         std::shared_ptr<device_buffer> buffer;\r
  84         if(!pool->items.try_pop(buffer))                \r
  85         {\r
  86                 ++pool->total_count;\r
  87                 executor_.invoke([&]\r
  88                 {       \r
  89                         try\r
  90                         {\r
  91                                 buffer.reset(new device_buffer(width, height, stride));\r
  92                         }\r
  93                         catch(...)\r
  94                         {\r
  95                                 try\r
  96                                 {\r
  97                                         yield();\r
  98                                         gc().wait();\r
  99                                         \r
 100                                         // Try again\r
 101                                         buffer.reset(new device_buffer(width, height, stride));\r
 102                                 }\r
 103                                 catch(...)\r
 104                                 {\r
 105                                         CASPAR_LOG(error) << L"ogl: create_device_buffer failed!";\r
 106                                         --pool->total_count;\r
 107                                         throw;\r
 108                                 }\r
 109                         }\r
 110                 }, high_priority);      \r
 111         }\r
 112         \r
 113         ++pool->usage_count;\r
 114 \r
 115         return safe_ptr<device_buffer>(buffer.get(), [=](device_buffer*) mutable\r
 116         {               \r
 117                 pool->items.push(buffer);       \r
 118         });\r
 119 }\r
 120         \r
 121 safe_ptr<host_buffer> ogl_device::create_host_buffer(size_t size, host_buffer::usage_t usage)\r
 122 {\r
 123         CASPAR_VERIFY(usage == host_buffer::write_only || usage == host_buffer::read_only);\r
 124         CASPAR_VERIFY(size > 0);\r
 125         auto& pool = host_pools_[usage][size];\r
 126         std::shared_ptr<host_buffer> buffer;\r
 127         if(!pool->items.try_pop(buffer))\r
 128         {\r
 129                 ++pool->total_count;\r
 130                 executor_.invoke([&]\r
 131                 {\r
 132                         try\r
 133                         {\r
 134                                 buffer.reset(new host_buffer(size, usage));\r
 135                                 if(usage == host_buffer::write_only)\r
 136                                         buffer->map();\r
 137                                 else\r
 138                                         buffer->unmap();                        \r
 139                         }\r
 140                         catch(...)\r
 141                         {\r
 142                                 try\r
 143                                 {\r
 144                                         yield();\r
 145                                         gc().wait();\r
 146 \r
 147                                         // Try again\r
 148                                         buffer.reset(new host_buffer(size, usage));\r
 149                                         if(usage == host_buffer::write_only)\r
 150                                                 buffer->map();\r
 151                                         else\r
 152                                                 buffer->unmap();        \r
 153                                 }\r
 154                                 catch(...)\r
 155                                 {\r
 156                                         CASPAR_LOG(error) << L"ogl: create_host_buffer failed!";\r
 157                                         --pool->total_count;\r
 158                                         throw;          \r
 159                                 }\r
 160                         }\r
 161                 }, high_priority);      \r
 162         }\r
 163         \r
 164         ++pool->usage_count;\r
 165 \r
 166         return safe_ptr<host_buffer>(buffer.get(), [=](host_buffer*) mutable\r
 167         {\r
 168                 executor_.begin_invoke([=]() mutable\r
 169                 {               \r
 170                         if(usage == host_buffer::write_only)\r
 171                                 buffer->map();\r
 172                         else\r
 173                                 buffer->unmap();\r
 174 \r
 175                         pool->items.push(buffer);\r
 176                 }, high_priority);      \r
 177         });\r
 178 }\r
 179 \r
 180 template<typename T>\r
 181 void flush_pool(buffer_pool<T>& pool)\r
 182 {       \r
 183         if(pool.flush_count.fetch_and_increment() < 3)\r
 184                 return;\r
 185 \r
 186         if(pool.usage_count.fetch_and_store(0) < pool.items.size())\r
 187         {\r
 188                 std::shared_ptr<T> buffer;\r
 189                 if(pool.items.try_pop(buffer))\r
 190                         --pool.total_count;\r
 191         }\r
 192 \r
 193         pool.flush_count = 0;\r
 194         pool.usage_count = 0;\r
 195 }\r
 196 \r
 197 void ogl_device::flush()\r
 198 {\r
 199         GL(glFlush());  \r
 200                 \r
 201         try\r
 202         {\r
 203                 BOOST_FOREACH(auto& pools, device_pools_)\r
 204                 {\r
 205                         BOOST_FOREACH(auto& pool, pools)\r
 206                                 flush_pool(*pool.second);\r
 207                 }\r
 208                 BOOST_FOREACH(auto& pools, host_pools_)\r
 209                 {\r
 210                         BOOST_FOREACH(auto& pool, pools)\r
 211                                 flush_pool(*pool.second);\r
 212                 }\r
 213         }\r
 214         catch(...)\r
 215         {\r
 216                 CASPAR_LOG_CURRENT_EXCEPTION();\r
 217         }\r
 218 }\r
 219 \r
 220 void ogl_device::yield()\r
 221 {\r
 222         executor_.yield();\r
 223 }\r
 224 \r
 225 boost::unique_future<void> ogl_device::gc()\r
 226 {       \r
 227         return begin_invoke([=]\r
 228         {\r
 229                 CASPAR_LOG(info) << " ogl: Running GC.";                \r
 230         \r
 231                 try\r
 232                 {\r
 233                         BOOST_FOREACH(auto& pools, device_pools_)\r
 234                         {\r
 235                                 BOOST_FOREACH(auto& pool, pools)\r
 236                                 {\r
 237                                         auto size = pool.second->items.size();\r
 238                                         std::shared_ptr<device_buffer> buffer;\r
 239                                         for(int n = 0; n < size && pool.second->items.try_pop(buffer); ++n)\r
 240                                                 --pool.second->total_count;\r
 241                                 }\r
 242                         }\r
 243                         BOOST_FOREACH(auto& pools, host_pools_)\r
 244                         {\r
 245                                 BOOST_FOREACH(auto& pool, pools)\r
 246                                 {\r
 247                                         auto size = pool.second->items.size();\r
 248                                         std::shared_ptr<host_buffer> buffer;\r
 249                                         for(int n = 0; n < size && pool.second->items.try_pop(buffer); ++n)\r
 250                                                 --pool.second->total_count;\r
 251                                 }\r
 252                         }\r
 253                 }\r
 254                 catch(...)\r
 255                 {\r
 256                         CASPAR_LOG_CURRENT_EXCEPTION();\r
 257                 }\r
 258         }, high_priority);\r
 259 }\r
 260 \r
 261 std::wstring ogl_device::get_version()\r
 262 {       \r
 263         static std::wstring ver = L"Not found";\r
 264         try\r
 265         {\r
 266                 ogl_device tmp;\r
 267                 ver = widen(tmp.invoke([]{return std::string(reinterpret_cast<const char*>(glGetString(GL_VERSION)));})\r
 268                 + " "   + tmp.invoke([]{return std::string(reinterpret_cast<const char*>(glGetString(GL_VENDOR)));}));                  \r
 269         }\r
 270         catch(...){}\r
 271 \r
 272         return ver;\r
 273 }\r
 274 \r
 275 \r
 276 void ogl_device::enable(GLenum cap)\r
 277 {\r
 278         auto& val = caps_[cap];\r
 279         if(!val)\r
 280         {\r
 281                 glEnable(cap);\r
 282                 val = true;\r
 283         }\r
 284 }\r
 285 \r
 286 void ogl_device::disable(GLenum cap)\r
 287 {\r
 288         auto& val = caps_[cap];\r
 289         if(val)\r
 290         {\r
 291                 glDisable(cap);\r
 292                 val = false;\r
 293         }\r
 294 }\r
 295 \r
 296 void ogl_device::viewport(size_t x, size_t y, size_t width, size_t height)\r
 297 {\r
 298         if(x != viewport_[0] || y != viewport_[1] || width != viewport_[2] || height != viewport_[3])\r
 299         {               \r
 300                 glViewport(x, y, width, height);\r
 301                 viewport_[0] = x;\r
 302                 viewport_[1] = y;\r
 303                 viewport_[2] = width;\r
 304                 viewport_[3] = height;\r
 305         }\r
 306 }\r
 307 \r
 308 void ogl_device::scissor(size_t x, size_t y, size_t width, size_t height)\r
 309 {\r
 310         if(x != scissor_[0] || y != scissor_[1] || width != scissor_[2] || height != scissor_[3])\r
 311         {               \r
 312                 glScissor(x, y, width, height);\r
 313                 scissor_[0] = x;\r
 314                 scissor_[1] = y;\r
 315                 scissor_[2] = width;\r
 316                 scissor_[3] = height;\r
 317         }\r
 318 }\r
 319 \r
 320 void ogl_device::stipple_pattern(const GLubyte* pattern)\r
 321 {\r
 322         if(pattern_ != pattern)\r
 323         {               \r
 324                 glPolygonStipple(pattern);\r
 325                 pattern_ = pattern;\r
 326         }\r
 327 }\r
 328 \r
 329 void ogl_device::attach(device_buffer& texture)\r
 330 {       \r
 331         if(attached_texture_ != texture.id())\r
 332         {\r
 333                 GL(glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0 + 0, GL_TEXTURE_2D, texture.id(), 0));\r
 334                 attached_texture_ = texture.id();\r
 335         }\r
 336 }\r
 337 \r
 338 void ogl_device::clear(device_buffer& texture)\r
 339 {       \r
 340         attach(texture);\r
 341         GL(glClear(GL_COLOR_BUFFER_BIT));\r
 342 }\r
 343 \r
 344 void ogl_device::use(shader& shader)\r
 345 {\r
 346         if(active_shader_ != shader.id())\r
 347         {               \r
 348                 GL(glUseProgramObjectARB(shader.id())); \r
 349                 active_shader_ = shader.id();\r
 350         }\r
 351 }\r
 352 \r
 353 }}\r
 354 \r