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‎CMakeLists.txt‎

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############################################################################
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# Copyright (c) 2016, Wolf Vollprecht, Johan Mabille, and Sylvain Corlay #
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# #
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# Distributed under the terms of the BSD 3-Clause License. #
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# #
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# The full license is in the file LICENSE, distributed with this software. #
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############################################################################
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cmake_minimum_required(VERSION 3.1)
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project(xtensor-io)
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set(XTENSOR_IO_INCLUDE_DIR ${CMAKE_CURRENT_SOURCE_DIR}/include)
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# Versionning
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# ===========
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file(STRINGS "${XTENSOR_IO_INCLUDE_DIR}/xtensor-io/xtensor_io_config.hpp" xtensor_io_version_defines
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REGEX "#define XTENSOR_IO_VERSION_(MAJOR|MINOR|PATCH)")
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foreach(ver ${xtensor_io_version_defines})
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if(ver MATCHES "#define XTENSOR_IO_VERSION_(MAJOR|MINOR|PATCH) +([^ ]+)$")
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set(XTENSOR_IO_VERSION_${CMAKE_MATCH_1} "${CMAKE_MATCH_2}" CACHE INTERNAL "")
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endif()
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endforeach()
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set(${PROJECT_NAME}_VERSION
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${XTENSOR_IO_VERSION_MAJOR}.${XTENSOR_IO_VERSION_MINOR}.${XTENSOR_IO_VERSION_PATCH})
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message(STATUS "Building xtensor-io v${${PROJECT_NAME}_VERSION}")
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# Dependencies
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# ============
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find_package(xtensor REQUIRED)
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message(STATUS "Found xtensor: ${xtensor_INCLUDE_DIRS}/xtensor")
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# Find OpenImageIO
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set(CMAKE_MODULE_PATH "${CMAKE_MODULE_PATH}" "${CMAKE_SOURCE_DIR}/modules")
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message("MODULE PATH: ${CMAKE_MODULE_PATH}")
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find_package(OIIO)
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message(STATUS "Found OpenImageIO: ${OIIO_INCLUDE_DIRS}")
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find_package(ZLIB)
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message(STATUS "Found zlib: ${zlib_INCLUDE_DIRS}")
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# Build
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# =====
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set(XTENSOR_IO_HEADERS
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${XTENSOR_IO_INCLUDE_DIR}/xtensor-io/ximageio.hpp
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${XTENSOR_IO_INCLUDE_DIR}/thirdparty/zstr/strict_fstream.hpp
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${XTENSOR_IO_INCLUDE_DIR}/thirdparty/zstr/zstr.hpp
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${XTENSOR_IO_INCLUDE_DIR}/xtensor-io/xnpz.hpp
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${XTENSOR_IO_INCLUDE_DIR}/xtensor-io/xtensor_io_config.hpp
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)
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OPTION(BUILD_TESTS "xtensor-io test suite" OFF)
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# OPTION(BUILD_BENCHMARK "xtensor-io benchmark" OFF)
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OPTION(DOWNLOAD_GTEST "build gtest from downloaded sources" OFF)
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OPTION(DOWNLOAD_GBENCHMARK "download google benchmark and build from source" ON)
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if(DOWNLOAD_GTEST OR GTEST_SRC_DIR)
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set(BUILD_TESTS ON)
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endif()
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if(BUILD_TESTS)
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add_subdirectory(test)
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endif()
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if(BUILD_BENCHMARK)
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add_subdirectory(benchmark)
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endif()
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include_directories(${xtensor_INCLUDE_DIRS})
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# Installation
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# ============
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include(GNUInstallDirs)
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include(CMakePackageConfigHelpers)
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install(FILES ${XTENSOR_IO_HEADERS}
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DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/xtensor-io)
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set(XTENSOR_IO_CMAKECONFIG_INSTALL_DIR "${CMAKE_INSTALL_LIBDIR}/cmake/${PROJECT_NAME}" CACHE
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STRING "install path for xtensor-ioConfig.cmake")
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configure_package_config_file(${PROJECT_NAME}Config.cmake.in
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"${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}Config.cmake"
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INSTALL_DESTINATION ${XTENSOR_IO_CMAKECONFIG_INSTALL_DIR})
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# xtensor is header-only and does not depend on the architecture.
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# Remove CMAKE_SIZEOF_VOID_P from xtensorConfigVersion.cmake so that an xtensorConfig.cmake
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# generated for a 64 bit target can be used for 32 bit targets and vice versa.
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set(_XTENSOR_IO_CMAKE_SIZEOF_VOID_P ${CMAKE_SIZEOF_VOID_P})
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unset(CMAKE_SIZEOF_VOID_P)
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write_basic_package_version_file(${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}ConfigVersion.cmake
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VERSION ${${PROJECT_NAME}_VERSION}
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COMPATIBILITY AnyNewerVersion)
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set(CMAKE_SIZEOF_VOID_P ${_XTENSOR_IO_CMAKE_SIZEOF_VOID_P})
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install(FILES ${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}Config.cmake
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${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}ConfigVersion.cmake
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DESTINATION ${XTENSOR_IO_CMAKECONFIG_INSTALL_DIR})
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configure_file(${PROJECT_NAME}.pc.in
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"${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}.pc"
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@ONLY)
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install(FILES "${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}.pc"
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DESTINATION "${CMAKE_INSTALL_LIBDIR}/pkgconfig/")

‎README.md‎

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# xtensor-io
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This library delivers a couple of function to efficiently in- and output
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images and NumPy compressed arrays (npz) to xtensor data structures.
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In order to read and write images, the ![OpenImageIO](https://github.com/OpenImageIO/oiio)
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library is utilized. We only provide a few simple functions, but upon demand
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can improve this interface.
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```cpp
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// loads png image into xarray with shape WIDTH x HEIGHT x CHANNELS
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auto arr = xt::load_image("test.png");
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// write xarray out to JPEG image
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xt::dump_image("dumptest.jpg", arr + 5);
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// load npz file containing multiple arrays
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auto npy_map = xt::load_npz("test.npz");
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auto arr_0 = npy_map["arr_0"].cast<double>();
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auto arr_1 = npy_map["arr_1"].cast<unsigned long>();
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```
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## Installation
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In order to install this library on linux systems, please find a copy
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of `libopenimageio` (on fedora: `dnf install OpenImageIO-devel`,
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ubuntu: `apt-get install libopenimageio-dev`). This should enable you
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to build the library like a regular cmake package:
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From this directory:
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```
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mkdir build
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cd build
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cmake ..
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make
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sudo make install
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```

‎include/xtensor-io/xtensor_io_config.hpp‎

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/***************************************************************************
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* Copyright (c) 2016, Johan Mabille, Sylvain Corlay and Wolf Vollprecht *
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* *
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* Distributed under the terms of the BSD 3-Clause License. *
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* *
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* The full license is in the file LICENSE, distributed with this software. *
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****************************************************************************/
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#ifndef XTENSOR_IO_CONFIG_HPP
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#define XTENSOR_IO_CONFIG_HPP
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#define XTENSOR_IO_VERSION_MAJOR 0
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#define XTENSOR_IO_VERSION_MINOR 1
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#define XTENSOR_IO_VERSION_PATCH 0
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#endif

‎tutorial/CMakeLists.txt‎

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‎tutorial/test.cpp‎

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‎xtensor-io.pc.in‎

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prefix=@CMAKE_INSTALL_PREFIX@
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libdir=${prefix}/@CMAKE_INSTALL_LIBDIR@
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includedir=${prefix}/include
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Name: xtensor
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Description: xtensor-io is a C++ library that enables opening and saving of common file and image formats to and from xtensor arrays.
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Version: @xtensor-io_VERSION@
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Cflags: -I${includedir}

‎xtensor-ioConfig.cmake.in‎

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############################################################################
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# Copyright (c) 2016, Johan Mabille and Sylvain Corlay #
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# #
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# Distributed under the terms of the BSD 3-Clause License. #
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# #
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# The full license is in the file LICENSE, distributed with this software. #
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############################################################################
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# xtensor cmake module
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# This module sets the following variables in your project::
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#
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# xtensor_io_FOUND - true if xtensor found on the system
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# xtensor_io_INCLUDE_DIRS - the directory containing xtensor headers
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# xtensor_io_LIBRARY - empty
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@PACKAGE_INIT@
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set(PN xtensor_io)
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set_and_check(${PN}_INCLUDE_DIRS "${PACKAGE_PREFIX_DIR}/@CMAKE_INSTALL_INCLUDEDIR@")
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set(${PN}_LIBRARY "")
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check_required_components(${PN})

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