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         });\r
  61 }\r
  62 \r
  63 ogl_device::~ogl_device()\r
  64 {\r
  65         invoke([=]\r
  66         {\r
  67                 BOOST_FOREACH(auto& pool, device_pools_)\r
  68                         pool.clear();\r
  69                 BOOST_FOREACH(auto& pool, host_pools_)\r
  70                         pool.clear();\r
  71                 glDeleteFramebuffersEXT(1, &fbo_);\r
  72         });\r
  73 }\r
  74                                 \r
  75 safe_ptr<device_buffer> ogl_device::create_device_buffer(size_t width, size_t height, size_t stride)\r
  76 {\r
  77         CASPAR_VERIFY(stride > 0 && stride < 5);\r
  78         CASPAR_VERIFY(width > 0 && height > 0);\r
  79         auto pool = device_pools_[stride-1][((width << 16) & 0xFFFF0000) | (height & 0x0000FFFF)];\r
  80         std::shared_ptr<device_buffer> buffer;\r
  81         if(!pool->try_pop(buffer))              \r
  82         {\r
  83                 executor_.invoke([&]\r
  84                 {       \r
  85                         try\r
  86                         {\r
  87                                 buffer.reset(new device_buffer(width, height, stride));\r
  88                         }\r
  89                         catch(...)\r
  90                         {\r
  91                                 try\r
  92                                 {\r
  93                                         yield();\r
  94                                         gc().wait();\r
  95                                         \r
  96                                         // Try again\r
  97                                         buffer.reset(new device_buffer(width, height, stride));\r
  98                                 }\r
  99                                 catch(...)\r
 100                                 {\r
 101                                         CASPAR_LOG(error) << L"ogl: create_device_buffer failed!";\r
 102                                         throw;\r
 103                                 }\r
 104                         }\r
 105 \r
 106                 }, high_priority);      \r
 107         }\r
 108                         \r
 109         return safe_ptr<device_buffer>(buffer.get(), [=](device_buffer*)\r
 110         {\r
 111                 pool->push(buffer);\r
 112         });\r
 113 }\r
 114         \r
 115 safe_ptr<host_buffer> ogl_device::create_host_buffer(size_t size, host_buffer::usage_t usage)\r
 116 {\r
 117         CASPAR_VERIFY(usage == host_buffer::write_only || usage == host_buffer::read_only);\r
 118         CASPAR_VERIFY(size > 0);\r
 119         auto pool = host_pools_[usage][size];\r
 120         std::shared_ptr<host_buffer> buffer;\r
 121         if(!pool->try_pop(buffer))\r
 122         {\r
 123                 executor_.invoke([&]\r
 124                 {\r
 125                         try\r
 126                         {\r
 127                                 buffer.reset(new host_buffer(size, usage));\r
 128                                 if(usage == host_buffer::write_only)\r
 129                                         buffer->map();\r
 130                                 else\r
 131                                         buffer->unmap();                        \r
 132                         }\r
 133                         catch(...)\r
 134                         {\r
 135                                 try\r
 136                                 {\r
 137                                         yield();\r
 138                                         gc().wait();\r
 139 \r
 140                                         // Try again\r
 141                                         buffer.reset(new host_buffer(size, usage));\r
 142                                         if(usage == host_buffer::write_only)\r
 143                                                 buffer->map();\r
 144                                         else\r
 145                                                 buffer->unmap();        \r
 146                                 }\r
 147                                 catch(...)\r
 148                                 {\r
 149                                         CASPAR_LOG(error) << L"ogl: create_host_buffer failed!";\r
 150                                         throw;          \r
 151                                 }\r
 152                         }\r
 153 \r
 154                 }, high_priority);      \r
 155         }\r
 156         \r
 157         return safe_ptr<host_buffer>(buffer.get(), [=](host_buffer*)\r
 158         {\r
 159                 executor_.begin_invoke([=]\r
 160                 {\r
 161                         if(usage == host_buffer::write_only)\r
 162                                 buffer->map();\r
 163                         else\r
 164                                 buffer->unmap();\r
 165                         \r
 166                         pool->push(buffer);\r
 167 \r
 168                 }, high_priority);\r
 169         });\r
 170 }\r
 171 \r
 172 void ogl_device::yield()\r
 173 {\r
 174         executor_.yield();\r
 175 }\r
 176 \r
 177 boost::unique_future<void> ogl_device::gc()\r
 178 {       \r
 179         return begin_invoke([=]\r
 180         {\r
 181                 CASPAR_LOG(info) << " ogl: Running GC.";                \r
 182         \r
 183                 try\r
 184                 {\r
 185                         BOOST_FOREACH(auto& pools, device_pools_)\r
 186                         {\r
 187                                 BOOST_FOREACH(auto& pool, pools)\r
 188                                         pool.second->clear();\r
 189                         }\r
 190                         BOOST_FOREACH(auto& pools, host_pools_)\r
 191                         {\r
 192                                 BOOST_FOREACH(auto& pool, pools)\r
 193                                         pool.second->clear();\r
 194                         }\r
 195                 }\r
 196                 catch(...)\r
 197                 {\r
 198                         CASPAR_LOG_CURRENT_EXCEPTION();\r
 199                 }\r
 200         }, high_priority);\r
 201 }\r
 202 \r
 203 std::wstring ogl_device::get_version()\r
 204 {       \r
 205         static std::wstring ver = L"Not found";\r
 206         try\r
 207         {\r
 208                 ogl_device tmp;\r
 209                 ver = widen(tmp.invoke([]{return std::string(reinterpret_cast<const char*>(glGetString(GL_VERSION)));})\r
 210                 + " "   + tmp.invoke([]{return std::string(reinterpret_cast<const char*>(glGetString(GL_VENDOR)));}));                  \r
 211         }\r
 212         catch(...){}\r
 213 \r
 214         return ver;\r
 215 }\r
 216 \r
 217 \r
 218 void ogl_device::enable(GLenum cap)\r
 219 {\r
 220         auto& val = caps_[cap];\r
 221         if(!val)\r
 222         {\r
 223                 glEnable(cap);\r
 224                 val = true;\r
 225         }\r
 226 }\r
 227 \r
 228 void ogl_device::disable(GLenum cap)\r
 229 {\r
 230         auto& val = caps_[cap];\r
 231         if(val)\r
 232         {\r
 233                 glDisable(cap);\r
 234                 val = false;\r
 235         }\r
 236 }\r
 237 \r
 238 void ogl_device::viewport(size_t x, size_t y, size_t width, size_t height)\r
 239 {\r
 240         if(x != viewport_[0] || y != viewport_[1] || width != viewport_[2] || height != viewport_[3])\r
 241         {               \r
 242                 glViewport(x, y, width, height);\r
 243                 viewport_[0] = x;\r
 244                 viewport_[1] = y;\r
 245                 viewport_[2] = width;\r
 246                 viewport_[3] = height;\r
 247         }\r
 248 }\r
 249 \r
 250 void ogl_device::scissor(size_t x, size_t y, size_t width, size_t height)\r
 251 {\r
 252         if(x != scissor_[0] || y != scissor_[1] || width != scissor_[2] || height != scissor_[3])\r
 253         {               \r
 254                 glScissor(x, y, width, height);\r
 255                 scissor_[0] = x;\r
 256                 scissor_[1] = y;\r
 257                 scissor_[2] = width;\r
 258                 scissor_[3] = height;\r
 259         }\r
 260 }\r
 261 \r
 262 void ogl_device::stipple_pattern(const GLubyte* pattern)\r
 263 {\r
 264         if(pattern_ != pattern)\r
 265         {               \r
 266                 glPolygonStipple(pattern);\r
 267                 pattern_ = pattern;\r
 268         }\r
 269 }\r
 270 \r
 271 void ogl_device::attach(device_buffer& texture)\r
 272 {       \r
 273         if(attached_texture_ != texture.id())\r
 274         {\r
 275                 glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0 + 0, GL_TEXTURE_2D, texture.id(), 0);\r
 276                 attached_texture_ = texture.id();\r
 277         }\r
 278 }\r
 279 \r
 280 void ogl_device::clear(device_buffer& texture)\r
 281 {       \r
 282         attach(texture);\r
 283         glClear(GL_COLOR_BUFFER_BIT);\r
 284 }\r
 285 \r
 286 void ogl_device::use(shader& shader)\r
 287 {\r
 288         if(active_shader_ != shader.id())\r
 289         {               \r
 290                 glUseProgramObjectARB(shader.id());     \r
 291                 active_shader_ = shader.id();\r
 292         }\r
 293 }\r
 294 \r
 295 }}\r
 296 \r