git.sesse.net Git - casparcg/blob - accelerator/ogl/util/texture.cpp

   1 /*\r
   2 * Copyright (c) 2011 Sveriges Television AB <info@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 "texture.h"\r
  25 \r
  26 #include "buffer.h"\r
  27 \r
  28 #include <common/except.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 #include <boost/thread/future.hpp>\r
  36 \r
  37 namespace caspar { namespace accelerator { namespace ogl {\r
  38         \r
  39 static GLenum FORMAT[] = {0, GL_RED, GL_RG, GL_BGR, GL_BGRA};\r
  40 static GLenum INTERNAL_FORMAT[] = {0, GL_R8, GL_RG8, GL_RGB8, GL_RGBA8};        \r
  41 static GLenum TYPE[] = {0, GL_UNSIGNED_BYTE, GL_UNSIGNED_BYTE, GL_UNSIGNED_BYTE, GL_UNSIGNED_INT_8_8_8_8_REV};  \r
  42 \r
  43 unsigned int format(int stride)\r
  44 {\r
  45         return FORMAT[stride];\r
  46 }\r
  47 \r
  48 static tbb::atomic<int> g_total_count;\r
  49 \r
  50 struct texture::impl : boost::noncopyable\r
  51 {\r
  52         GLuint                                          id_;\r
  53 \r
  54         const int width_;\r
  55         const int height_;\r
  56         const int stride_;\r
  57 public:\r
  58         impl(int width, int height, int 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_], TYPE[stride_], NULL));\r
  70                 GL(glBindTexture(GL_TEXTURE_2D, 0));\r
  71                 //CASPAR_LOG(trace) << "[texture] [" << ++g_total_count << L"] allocated size:" << width*height*stride; \r
  72         }       \r
  73 \r
  74         ~impl()\r
  75         {\r
  76                 glDeleteTextures(1, &id_);\r
  77         }\r
  78         \r
  79         void bind()\r
  80         {\r
  81                 GL(glBindTexture(GL_TEXTURE_2D, id_));\r
  82         }\r
  83 \r
  84         void bind(int index)\r
  85         {\r
  86                 GL(glActiveTexture(GL_TEXTURE0+index));\r
  87                 bind();\r
  88         }\r
  89 \r
  90         void unbind()\r
  91         {\r
  92                 GL(glBindTexture(GL_TEXTURE_2D, 0));\r
  93         }\r
  94 \r
  95         void attach()\r
  96         {               \r
  97                 GL(glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0 + 0, GL_TEXTURE_2D, id_, 0));\r
  98         }\r
  99 \r
 100         void clear()\r
 101         {\r
 102                 attach();               \r
 103                 GL(glClear(GL_COLOR_BUFFER_BIT));\r
 104         }\r
 105                 \r
 106         void copy_from(buffer& source)\r
 107         {\r
 108                 source.unmap();\r
 109                 source.bind();\r
 110                 GL(glBindTexture(GL_TEXTURE_2D, id_));\r
 111                 GL(glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, width_, height_, FORMAT[stride_], TYPE[stride_], NULL));\r
 112                 GL(glBindTexture(GL_TEXTURE_2D, 0));\r
 113                 source.unbind();\r
 114         }\r
 115 \r
 116         void copy_to(buffer& dest)\r
 117         {\r
 118                 dest.unmap();\r
 119                 dest.bind();\r
 120                 GL(glBindTexture(GL_TEXTURE_2D, id_));\r
 121                 GL(glReadBuffer(GL_COLOR_ATTACHMENT0));\r
 122                 GL(glReadPixels(0, 0, width_, height_, FORMAT[stride_], TYPE[stride_], NULL));\r
 123                 GL(glBindTexture(GL_TEXTURE_2D, 0));\r
 124                 dest.unbind();\r
 125                 GL(glFlush());\r
 126         }\r
 127 };\r
 128 \r
 129 texture::texture(int width, int height, int stride) : impl_(new impl(width, height, stride)){}\r
 130 texture::~texture(){}\r
 131 void texture::bind(int index){impl_->bind(index);}\r
 132 void texture::unbind(){impl_->unbind();}\r
 133 void texture::attach(){impl_->attach();}\r
 134 void texture::clear(){impl_->clear();}\r
 135 void texture::copy_from(buffer& source){impl_->copy_from(source);}\r
 136 void texture::copy_to(buffer& dest){impl_->copy_to(dest);}\r
 137 int texture::width() const { return impl_->width_; }\r
 138 int texture::height() const { return impl_->height_; }\r
 139 int texture::size() const { return impl_->width_*impl_->height_*impl_->stride_; }\r
 140 int texture::stride() const { return impl_->stride_; }\r
 141 int texture::id() const{ return impl_->id_;}\r
 142 \r
 143 }}}