ImageWarpingFieldIO.cpp

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// ----------------------------------------------------------------------------
// -                        CloudViewer: www.cloudViewer.org                  -
// ----------------------------------------------------------------------------
// Copyright (c) 2018-2024 www.cloudViewer.org
// SPDX-License-Identifier: MIT
// ----------------------------------------------------------------------------
 
#include "io/ImageWarpingFieldIO.h"
 
#include <FileSystem.h>
#include <IJsonConvertibleIO.h>
#include <Logging.h>
 
#include <unordered_map>
 
namespace cloudViewer {
 
namespace {
using namespace io;
 
bool ReadImageWarpingFieldFromJSON(
        const std::string &filename,
        pipelines::color_map::ImageWarpingField &warping_field) {
    return ReadIJsonConvertible(filename, warping_field);
}
 
bool WriteImageWarpingFieldToJSON(
        const std::string &filename,
        const pipelines::color_map::ImageWarpingField &warping_field) {
    return WriteIJsonConvertibleToJSON(filename, warping_field);
}
 
static const std::unordered_map<
        std::string,
        std::function<bool(const std::string &,
                           pipelines::color_map::ImageWarpingField &)>>
        file_extension_to_warping_field_read_function{
                {"json", ReadImageWarpingFieldFromJSON},
        };
 
static const std::unordered_map<
        std::string,
        std::function<bool(const std::string &,
                           const pipelines::color_map::ImageWarpingField &)>>
        file_extension_to_warping_field_write_function{
                {"json", WriteImageWarpingFieldToJSON},
        };
 
}  // unnamed namespace
 
namespace io {
using namespace cloudViewer;
 
std::shared_ptr<pipelines::color_map::ImageWarpingField>
CreateImageWarpingFieldFromFile(const std::string &filename) {
    auto warping_field =
            std::make_shared<pipelines::color_map::ImageWarpingField>();
    ReadImageWarpingField(filename, *warping_field);
    return warping_field;
}
 
bool ReadImageWarpingField(
        const std::string &filename,
        pipelines::color_map::ImageWarpingField &warping_field) {
    std::string filename_ext =
            utility::filesystem::GetFileExtensionInLowerCase(filename);
    if (filename_ext.empty()) {
        utility::LogWarning(
                "Read pipelines::color_map::ImageWarpingField failed: unknown "
                "file "
                "extension.");
        return false;
    }
    auto map_itr =
            file_extension_to_warping_field_read_function.find(filename_ext);
    if (map_itr == file_extension_to_warping_field_read_function.end()) {
        utility::LogWarning(
                "Read pipelines::color_map::ImageWarpingField failed: unknown "
                "file "
                "extension.");
        return false;
    }
    return map_itr->second(filename, warping_field);
}
 
bool WriteImageWarpingField(
        const std::string &filename,
        const pipelines::color_map::ImageWarpingField &trajectory) {
    std::string filename_ext =
            utility::filesystem::GetFileExtensionInLowerCase(filename);
    if (filename_ext.empty()) {
        utility::LogWarning(
                "Write pipelines::color_map::ImageWarpingField failed: unknown "
                "file "
                "extension.");
        return false;
    }
    auto map_itr =
            file_extension_to_warping_field_write_function.find(filename_ext);
    if (map_itr == file_extension_to_warping_field_write_function.end()) {
        utility::LogWarning(
                "Write pipelines::color_map::ImageWarpingField failed: unknown "
                "file "
                "extension.");
        return false;
    }
    return map_itr->second(filename, trajectory);
}
 
}  // namespace io
}  // namespace cloudViewer