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->try_pop(buffer))              \r
  85         {\r
  86                 executor_.invoke([&]\r
  87                 {       \r
  88                         try\r
  89                         {\r
  90                                 buffer.reset(new device_buffer(width, height, stride));\r
  91                         }\r
  92                         catch(...)\r
  93                         {\r
  94                                 try\r
  95                                 {\r
  96                                         yield();\r
  97                                         gc().wait();\r
  98                                         \r
  99                                         // Try again\r
 100                                         buffer.reset(new device_buffer(width, height, stride));\r
 101                                 }\r
 102                                 catch(...)\r
 103                                 {\r
 104                                         CASPAR_LOG(error) << L"ogl: create_device_buffer failed!";\r
 105                                         throw;\r
 106                                 }\r
 107                         }\r
 108 \r
 109                 }, high_priority);      \r
 110         }\r
 111                         \r
 112         return safe_ptr<device_buffer>(buffer.get(), [=](device_buffer*)\r
 113         {\r
 114                 pool->push(buffer);\r
 115         });\r
 116 }\r
 117         \r
 118 safe_ptr<host_buffer> ogl_device::create_host_buffer(size_t size, host_buffer::usage_t usage)\r
 119 {\r
 120         CASPAR_VERIFY(usage == host_buffer::write_only || usage == host_buffer::read_only);\r
 121         CASPAR_VERIFY(size > 0);\r
 122         auto pool = host_pools_[usage][size];\r
 123         std::shared_ptr<host_buffer> buffer;\r
 124         if(!pool->try_pop(buffer))\r
 125         {\r
 126                 executor_.invoke([&]\r
 127                 {\r
 128                         try\r
 129                         {\r
 130                                 buffer.reset(new host_buffer(size, usage));\r
 131                                 if(usage == host_buffer::write_only)\r
 132                                         buffer->map();\r
 133                                 else\r
 134                                         buffer->unmap();                        \r
 135                         }\r
 136                         catch(...)\r
 137                         {\r
 138                                 try\r
 139                                 {\r
 140                                         yield();\r
 141                                         gc().wait();\r
 142 \r
 143                                         // Try again\r
 144                                         buffer.reset(new host_buffer(size, usage));\r
 145                                         if(usage == host_buffer::write_only)\r
 146                                                 buffer->map();\r
 147                                         else\r
 148                                                 buffer->unmap();        \r
 149                                 }\r
 150                                 catch(...)\r
 151                                 {\r
 152                                         CASPAR_LOG(error) << L"ogl: create_host_buffer failed!";\r
 153                                         throw;          \r
 154                                 }\r
 155                         }\r
 156 \r
 157                 }, high_priority);      \r
 158         }\r
 159         \r
 160         return safe_ptr<host_buffer>(buffer.get(), [=](host_buffer*)\r
 161         {\r
 162                 executor_.begin_invoke([=]\r
 163                 {\r
 164                         if(usage == host_buffer::write_only)\r
 165                                 buffer->map();\r
 166                         else\r
 167                                 buffer->unmap();\r
 168                         \r
 169                         pool->push(buffer);\r
 170 \r
 171                 }, high_priority);\r
 172         });\r
 173 }\r
 174 \r
 175 void ogl_device::yield()\r
 176 {\r
 177         executor_.yield();\r
 178 }\r
 179 \r
 180 boost::unique_future<void> ogl_device::gc()\r
 181 {       \r
 182         return begin_invoke([=]\r
 183         {\r
 184                 CASPAR_LOG(info) << " ogl: Running GC.";                \r
 185         \r
 186                 try\r
 187                 {\r
 188                         BOOST_FOREACH(auto& pools, device_pools_)\r
 189                         {\r
 190                                 BOOST_FOREACH(auto& pool, pools)\r
 191                                         pool.second->clear();\r
 192                         }\r
 193                         BOOST_FOREACH(auto& pools, host_pools_)\r
 194                         {\r
 195                                 BOOST_FOREACH(auto& pool, pools)\r
 196                                         pool.second->clear();\r
 197                         }\r
 198                 }\r
 199                 catch(...)\r
 200                 {\r
 201                         CASPAR_LOG_CURRENT_EXCEPTION();\r
 202                 }\r
 203         }, high_priority);\r
 204 }\r
 205 \r
 206 std::wstring ogl_device::get_version()\r
 207 {       \r
 208         static std::wstring ver = L"Not found";\r
 209         try\r
 210         {\r
 211                 ogl_device tmp;\r
 212                 ver = widen(tmp.invoke([]{return std::string(reinterpret_cast<const char*>(glGetString(GL_VERSION)));})\r
 213                 + " "   + tmp.invoke([]{return std::string(reinterpret_cast<const char*>(glGetString(GL_VENDOR)));}));                  \r
 214         }\r
 215         catch(...){}\r
 216 \r
 217         return ver;\r
 218 }\r
 219 \r
 220 \r
 221 void ogl_device::enable(GLenum cap)\r
 222 {\r
 223         auto& val = caps_[cap];\r
 224         if(!val)\r
 225         {\r
 226                 glEnable(cap);\r
 227                 val = true;\r
 228         }\r
 229 }\r
 230 \r
 231 void ogl_device::disable(GLenum cap)\r
 232 {\r
 233         auto& val = caps_[cap];\r
 234         if(val)\r
 235         {\r
 236                 glDisable(cap);\r
 237                 val = false;\r
 238         }\r
 239 }\r
 240 \r
 241 void ogl_device::viewport(size_t x, size_t y, size_t width, size_t height)\r
 242 {\r
 243         if(x != viewport_[0] || y != viewport_[1] || width != viewport_[2] || height != viewport_[3])\r
 244         {               \r
 245                 glViewport(x, y, width, height);\r
 246                 viewport_[0] = x;\r
 247                 viewport_[1] = y;\r
 248                 viewport_[2] = width;\r
 249                 viewport_[3] = height;\r
 250         }\r
 251 }\r
 252 \r
 253 void ogl_device::scissor(size_t x, size_t y, size_t width, size_t height)\r
 254 {\r
 255         if(x != scissor_[0] || y != scissor_[1] || width != scissor_[2] || height != scissor_[3])\r
 256         {               \r
 257                 glScissor(x, y, width, height);\r
 258                 scissor_[0] = x;\r
 259                 scissor_[1] = y;\r
 260                 scissor_[2] = width;\r
 261                 scissor_[3] = height;\r
 262         }\r
 263 }\r
 264 \r
 265 void ogl_device::stipple_pattern(const GLubyte* pattern)\r
 266 {\r
 267         if(pattern_ != pattern)\r
 268         {               \r
 269                 glPolygonStipple(pattern);\r
 270                 pattern_ = pattern;\r
 271         }\r
 272 }\r
 273 \r
 274 void ogl_device::attach(device_buffer& texture)\r
 275 {       \r
 276         if(attached_texture_ != texture.id())\r
 277         {\r
 278                 GL(glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0 + 0, GL_TEXTURE_2D, texture.id(), 0));\r
 279                 attached_texture_ = texture.id();\r
 280         }\r
 281 }\r
 282 \r
 283 void ogl_device::clear(device_buffer& texture)\r
 284 {       \r
 285         attach(texture);\r
 286         GL(glClear(GL_COLOR_BUFFER_BIT));\r
 287 }\r
 288 \r
 289 void ogl_device::use(shader& shader)\r
 290 {\r
 291         if(active_shader_ != shader.id())\r
 292         {               \r
 293                 GL(glUseProgramObjectARB(shader.id())); \r
 294                 active_shader_ = shader.id();\r
 295         }\r
 296 }\r
 297 \r
 298 }}\r
 299 \r