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

   1 /*\r
   2 * Copyright 2013 Sveriges Television AB http://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 #include "../../stdafx.h"\r
  23 \r
  24 #include "device_buffer.h"\r
  25 \r
  26 #include "fence.h"\r
  27 \r
  28 #include <common/exception/exceptions.h>\r
  29 #include <common/gl/gl_check.h>\r
  30 \r
  31 #include <gl/glew.h>\r
  32 \r
  33 #include <tbb/atomic.h>\r
  34 \r
  35 namespace caspar { namespace core {\r
  36         \r
  37 static GLenum FORMAT[] = {0, GL_RED, GL_RG, GL_BGR, GL_BGRA};\r
  38 static GLenum INTERNAL_FORMAT[] = {0, GL_R8, GL_RG8, GL_RGB8, GL_RGBA8};        \r
  39 \r
  40 unsigned int format(size_t stride)\r
  41 {\r
  42         return FORMAT[stride];\r
  43 }\r
  44 \r
  45 static tbb::atomic<int> g_total_count;\r
  46 \r
  47 struct device_buffer::implementation : boost::noncopyable\r
  48 {\r
  49         GLuint id_;\r
  50 \r
  51         const size_t width_;\r
  52         const size_t height_;\r
  53         const size_t stride_;\r
  54 \r
  55         fence            fence_;\r
  56 \r
  57 public:\r
  58         implementation(size_t width, size_t height, size_t stride) \r
  59                 : width_(width)\r
  60                 , height_(height)\r
  61                 , stride_(stride)\r
  62         {       \r
  63                 GL(glGenTextures(1, &id_));\r
  64                 GL(glBindTexture(GL_TEXTURE_2D, id_));\r
  65                 GL(glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR));\r
  66                 GL(glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR));\r
  67                 GL(glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE));\r
  68                 GL(glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE));\r
  69                 GL(glTexImage2D(GL_TEXTURE_2D, 0, INTERNAL_FORMAT[stride_], width_, height_, 0, FORMAT[stride_], GL_UNSIGNED_BYTE, NULL));\r
  70                 GL(glBindTexture(GL_TEXTURE_2D, 0));\r
  71                 CASPAR_LOG(trace) << "[device_buffer] [" << ++g_total_count << L"] allocated size:" << width*height*stride;     \r
  72         }       \r
  73 \r
  74         ~implementation()\r
  75         {\r
  76                 try\r
  77                 {\r
  78                         GL(glDeleteTextures(1, &id_));\r
  79                         //CASPAR_LOG(trace) << "[device_buffer] [" << --g_total_count << L"] deallocated size:" << width_*height_*stride_;\r
  80                 }\r
  81                 catch(...)\r
  82                 {\r
  83                         CASPAR_LOG_CURRENT_EXCEPTION();\r
  84                 }\r
  85         }\r
  86         \r
  87         void bind()\r
  88         {\r
  89                 GL(glBindTexture(GL_TEXTURE_2D, id_));\r
  90         }\r
  91 \r
  92         void bind(int index)\r
  93         {\r
  94                 GL(glActiveTexture(GL_TEXTURE0+index));\r
  95                 bind();\r
  96         }\r
  97 \r
  98         void unbind()\r
  99         {\r
 100                 GL(glBindTexture(GL_TEXTURE_2D, 0));\r
 101         }\r
 102 \r
 103         void begin_read()\r
 104         {\r
 105                 bind();\r
 106                 GL(glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, width_, height_, FORMAT[stride_], GL_UNSIGNED_BYTE, NULL));\r
 107                 unbind();\r
 108                 fence_.set();\r
 109         }\r
 110         \r
 111         bool ready() const\r
 112         {\r
 113                 return fence_.ready();\r
 114         }\r
 115 };\r
 116 \r
 117 device_buffer::device_buffer(size_t width, size_t height, size_t stride) : impl_(new implementation(width, height, stride)){}\r
 118 size_t device_buffer::stride() const { return impl_->stride_; }\r
 119 size_t device_buffer::width() const { return impl_->width_; }\r
 120 size_t device_buffer::height() const { return impl_->height_; }\r
 121 void device_buffer::bind(int index){impl_->bind(index);}\r
 122 void device_buffer::unbind(){impl_->unbind();}\r
 123 void device_buffer::begin_read(){impl_->begin_read();}\r
 124 bool device_buffer::ready() const{return impl_->ready();}\r
 125 int device_buffer::id() const{ return impl_->id_;}\r
 126 \r
 127 \r
 128 }}