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"

#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(),::tolower);

	// 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 s = in.find_last_of('.');
		if (s == std::string::npos) {
			s = in.length();
		}

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

	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