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

   1 #include "../stdafx.h"\r
   2 \r
   3 #include "device_buffer.h"\r
   4 \r
   5 #include <common/gl/gl_check.h>\r
   6 namespace caspar { namespace core {\r
   7         \r
   8 GLenum FORMAT[] = {0, GL_LUMINANCE, GL_LUMINANCE_ALPHA, GL_BGR, GL_BGRA};\r
   9 GLenum INTERNAL_FORMAT[] = {0, GL_LUMINANCE8, GL_LUMINANCE8_ALPHA8, GL_RGB8, GL_RGBA8}; \r
  10 \r
  11 struct device_buffer::implementation : boost::noncopyable\r
  12 {\r
  13         GLuint id_;\r
  14 \r
  15         const size_t width_;\r
  16         const size_t height_;\r
  17         const size_t stride_;\r
  18 \r
  19 public:\r
  20         implementation(size_t width, size_t height, size_t stride) \r
  21                 : width_(width)\r
  22                 , height_(height)\r
  23                 , stride_(stride)\r
  24         {       \r
  25                 GL(glGenTextures(1, &id_));\r
  26                 GL(glBindTexture(GL_TEXTURE_2D, id_));\r
  27                 GL(glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR));\r
  28                 GL(glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR));\r
  29                 GL(glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE));\r
  30                 GL(glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE));\r
  31                 GL(glTexImage2D(GL_TEXTURE_2D, 0, INTERNAL_FORMAT[stride_], width_, height_, 0, FORMAT[stride_], GL_UNSIGNED_BYTE, NULL));\r
  32                 GL(glBindTexture(GL_TEXTURE_2D, 0));\r
  33                 //CASPAR_LOG(trace) << "[device_buffer] allocated size:" << width*height*stride;        \r
  34         }       \r
  35 \r
  36         ~implementation()\r
  37         {\r
  38                 GL(glDeleteTextures(1, &id_));\r
  39         }\r
  40         \r
  41         void bind()\r
  42         {\r
  43                 GL(glBindTexture(GL_TEXTURE_2D, id_));\r
  44         }\r
  45 \r
  46         void unbind()\r
  47         {\r
  48                 GL(glBindTexture(GL_TEXTURE_2D, 0));\r
  49         }\r
  50 \r
  51         void read(host_buffer& source)\r
  52         {\r
  53                 GL(glBindTexture(GL_TEXTURE_2D, id_));\r
  54                 source.unmap();\r
  55                 source.bind();\r
  56                 GL(glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, width_, height_, FORMAT[stride_], GL_UNSIGNED_BYTE, NULL));\r
  57                 source.unbind();\r
  58                 GL(glBindTexture(GL_TEXTURE_2D, 0));\r
  59         }\r
  60         \r
  61         void write(host_buffer& target)\r
  62         {\r
  63                 GL(glBindTexture(GL_TEXTURE_2D, id_));\r
  64                 target.unmap();\r
  65                 target.bind();\r
  66                 GL(glReadPixels(0, 0, width_, height_, FORMAT[stride_], GL_UNSIGNED_BYTE, NULL));\r
  67                 target.unbind();\r
  68                 GL(glBindTexture(GL_TEXTURE_2D, 0));\r
  69         }\r
  70 \r
  71         void attach(int index)\r
  72         {\r
  73                 GL(glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0 + index, GL_TEXTURE_2D, id_, 0));\r
  74         }\r
  75 };\r
  76 \r
  77 device_buffer::device_buffer(size_t width, size_t height, size_t stride) : impl_(new implementation(width, height, stride)){}\r
  78 size_t device_buffer::stride() const { return impl_->stride_; }\r
  79 size_t device_buffer::width() const { return impl_->width_; }\r
  80 size_t device_buffer::height() const { return impl_->height_; }\r
  81 void device_buffer::attach(int index){impl_->attach(index);}\r
  82 void device_buffer::bind(){impl_->bind();}\r
  83 void device_buffer::unbind(){impl_->unbind();}\r
  84 void device_buffer::read(host_buffer& source){impl_->read(source);}\r
  85 void device_buffer::write(host_buffer& target){impl_->write(target);}\r
  86 \r
  87 }}