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