ceph/src/boost/boost/compute/interop/opencv/core.hpp

   1 //---------------------------------------------------------------------------//
   2 // Copyright (c) 2013-2014 Kyle Lutz <kyle.r.lutz@gmail.com>
   3 //
   4 // Distributed under the Boost Software License, Version 1.0
   5 // See accompanying file LICENSE_1_0.txt or copy at
   6 // http://www.boost.org/LICENSE_1_0.txt
   7 //
   8 // See http://boostorg.github.com/compute for more information.
   9 //---------------------------------------------------------------------------//
  10
  11 #ifndef BOOST_COMPUTE_INTEROP_OPENCV_CORE_HPP
  12 #define BOOST_COMPUTE_INTEROP_OPENCV_CORE_HPP
  13
  14 #include <opencv2/core/core.hpp>
  15
  16 #include <boost/throw_exception.hpp>
  17
  18 #include <boost/compute/algorithm/copy_n.hpp>
  19 #include <boost/compute/exception/opencl_error.hpp>
  20 #include <boost/compute/image/image2d.hpp>
  21 #include <boost/compute/image/image_format.hpp>
  22 #include <boost/compute/iterator/buffer_iterator.hpp>
  23
  24 namespace boost {
  25 namespace compute {
  26
  27 template<class T>
  28 inline void opencv_copy_mat_to_buffer(const cv::Mat &mat,
  29                                       buffer_iterator<T> buffer,
  30                                       command_queue &queue = system::default_queue())
  31 {
  32     BOOST_ASSERT(mat.isContinuous());
  33
  34     ::boost::compute::copy_n(
  35         reinterpret_cast<T *>(mat.data), mat.rows * mat.cols, buffer, queue
  36     );
  37 }
  38
  39 template<class T>
  40 inline void opencv_copy_buffer_to_mat(const buffer_iterator<T> buffer,
  41                                       cv::Mat &mat,
  42                                       command_queue &queue = system::default_queue())
  43 {
  44     BOOST_ASSERT(mat.isContinuous());
  45
  46     ::boost::compute::copy_n(
  47         buffer, mat.cols * mat.rows, reinterpret_cast<T *>(mat.data), queue
  48     );
  49 }
  50
  51 inline void opencv_copy_mat_to_image(const cv::Mat &mat,
  52                                      image2d &image,
  53                                      command_queue &queue = system::default_queue())
  54 {
  55     BOOST_ASSERT(mat.data != 0);
  56     BOOST_ASSERT(mat.isContinuous());
  57     BOOST_ASSERT(image.get_context() == queue.get_context());
  58
  59     queue.enqueue_write_image(image, image.origin(), image.size(), mat.data);
  60 }
  61
  62 inline void opencv_copy_image_to_mat(const image2d &image,
  63                                      cv::Mat &mat,
  64                                      command_queue &queue = system::default_queue())
  65 {
  66     BOOST_ASSERT(mat.isContinuous());
  67     BOOST_ASSERT(image.get_context() == queue.get_context());
  68
  69     queue.enqueue_read_image(image, image.origin(), image.size(), mat.data);
  70 }
  71
  72 inline image_format opencv_get_mat_image_format(const cv::Mat &mat)
  73 {
  74     switch(mat.type()){
  75         case CV_8UC4:
  76             return image_format(CL_BGRA, CL_UNORM_INT8);
  77         case CV_16UC4:
  78             return image_format(CL_BGRA, CL_UNORM_INT16);
  79         case CV_32F:
  80             return image_format(CL_INTENSITY, CL_FLOAT);
  81         case CV_32FC4:
  82             return image_format(CL_RGBA, CL_FLOAT);
  83         case CV_8UC1:
  84             return image_format(CL_INTENSITY, CL_UNORM_INT8);
  85     }
  86
  87     BOOST_THROW_EXCEPTION(opencl_error(CL_IMAGE_FORMAT_NOT_SUPPORTED));
  88 }
  89
  90 inline cv::Mat opencv_create_mat_with_image2d(const image2d &image,
  91                                               command_queue &queue = system::default_queue())
  92 {
  93     BOOST_ASSERT(image.get_context() == queue.get_context());
  94
  95     cv::Mat mat;
  96     image_format format = image.get_format();
  97     const cl_image_format *cl_image_format = format.get_format_ptr();
  98
  99     if(cl_image_format->image_channel_data_type == CL_UNORM_INT8 &&
 100             cl_image_format->image_channel_order == CL_BGRA)
 101     {
 102         mat = cv::Mat(image.height(), image.width(), CV_8UC4);
 103     }
 104     else if(cl_image_format->image_channel_data_type == CL_UNORM_INT16 &&
 105             cl_image_format->image_channel_order == CL_BGRA)
 106     {
 107         mat = cv::Mat(image.height(), image.width(), CV_16UC4);
 108     }
 109     else if(cl_image_format->image_channel_data_type == CL_FLOAT &&
 110             cl_image_format->image_channel_order == CL_INTENSITY)
 111     {
 112         mat = cv::Mat(image.height(), image.width(), CV_32FC1);
 113     }
 114     else
 115     {
 116         mat = cv::Mat(image.height(), image.width(), CV_8UC1);
 117     }
 118
 119     opencv_copy_image_to_mat(image, mat, queue);
 120
 121     return mat;
 122 }
 123
 124 inline image2d opencv_create_image2d_with_mat(const cv::Mat &mat,
 125                                               cl_mem_flags flags,
 126                                               command_queue &queue = system::default_queue())
 127 {
 128     const context &context = queue.get_context();
 129     const image_format format = opencv_get_mat_image_format(mat);
 130
 131     image2d image(context, mat.cols, mat.rows, format, flags);
 132
 133     opencv_copy_mat_to_image(mat, image, queue);
 134
 135     return image;
 136 }
 137
 138 } // end compute namespace
 139 } // end boost namespace
 140
 141 #endif // BOOST_COMPUTE_INTEROP_OPENCV_CORE_HPP