assimp/tools/assimp_cmd/Export.cpp

/*
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Open Asset Import Library (assimp)
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  following disclaimer.

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*/

/** @file  Export.cpp
 *  @brief Implementation of the 'assimp export' utility
 */

#include "Main.h"
#include <assimp/ParsingUtils.h>
#include <assimp/StringUtils.h>

#ifndef ASSIMP_BUILD_NO_EXPORT

const char *AICMD_MSG_EXPORT_HELP_E =
        "assimp export <model> [<out>] [-f<h>] [common parameters]\n"
        "\t -f<h> Specify the file format. If omitted, the output format is \n"
        "\t\tderived from the file extension of the given output file  \n"
        "\t[See the assimp_cmd docs for a full list of all common parameters]  \n";

// -----------------------------------------------------------------------------------
size_t GetMatchingFormat(const std::string &outf, bool byext = false) {
    for (size_t i = 0, end = globalExporter->GetExportFormatCount(); i < end; ++i) {
        const aiExportFormatDesc *const e = globalExporter->GetExportFormatDescription(i);
        if (outf == (byext ? e->fileExtension : e->id)) {
            return i;
        }
    }
    return SIZE_MAX;
}

// -----------------------------------------------------------------------------------
int Assimp_Export(const char *const *params, unsigned int num) {
    const char *const invalid = "assimp export: Invalid number of arguments. See \'assimp export --help\'\n";
    if (num < 1) {
        printf(invalid);
        return AssimpCmdError::InvalidNumberOfArguments;
    }

    // --help
    if (!strcmp(params[0], "-h") || !strcmp(params[0], "--help") || !strcmp(params[0], "-?")) {
        printf("%s", AICMD_MSG_EXPORT_HELP_E);
        return AssimpCmdError::Success;
    }

    std::string in = std::string(params[0]);
    std::string out = (num > 1 ? std::string(params[1]) : "-"), outext;

    //
    const std::string::size_type s = out.find_last_of('.');
    if (s != std::string::npos) {
        outext = out.substr(s + 1);
        out = out.substr(0, s);
    }

    // get import flags
    ImportData import;
    ProcessStandardArguments(import, params + 1, num - 1);

    // process other flags
    std::string outf = "";
    for (unsigned int i = (out[0] == '-' ? 1 : 2); i < num; ++i) {
        if (!params[i]) {
            continue;
        }
        if (!strncmp(params[i], "-f", 2)) {
            if (strncmp(params[i], "-fi", 3))
                outf = std::string(params[i] + 2);
        } else if (!strncmp(params[i], "--format=", 9)) {
            outf = std::string(params[i] + 9);
        }
    }

    std::transform(outf.begin(), outf.end(), outf.begin(), ai_tolower<char>);

    // convert the output format to a format id
    size_t outfi = GetMatchingFormat(outf);
    if (outfi == SIZE_MAX) {
        if (outf.length()) {
            printf("assimp export: warning, format id \'%s\' is unknown\n", outf.c_str());
        }

        // retry to see if we know it as file extension
        outfi = GetMatchingFormat(outf, true);
        if (outfi == SIZE_MAX) {
            // retry to see if we know the file extension of the output file
            outfi = GetMatchingFormat(outext, true);

            if (outfi == SIZE_MAX) {
                // still no match -> failure
                printf("assimp export: no output format specified and I failed to guess it\n");
                return -23;
            }
        } else {
            outext = outf;
        }
    }

    // if no output file is specified, take the file name from input file
    if (out[0] == '-') {
        std::string::size_type pos = in.find_last_of('.');
        if (pos == std::string::npos) {
            pos = in.length();
        }

        out = in.substr(0, pos);
    }

    const aiExportFormatDesc *const e = globalExporter->GetExportFormatDescription(outfi);
    printf("assimp export: select file format: \'%s\' (%s)\n", e->id, e->description);

    // import the  model
    const aiScene *scene = ImportModel(import, in);
    if (!scene) {
        return AssimpCmdExportError::FailedToImportModel;
    }

    // derive the final file name
    out += "." + outext;

    // and call the export routine
    if (!ExportModel(scene, import, out, e->id)) {
        return AssimpCmdExportError::FailedToExportModel;
    }
    printf("assimp export: wrote output file: %s\n", out.c_str());
    return AssimpCmdError::Success;
}

#endif // no export