//
// Copyright 2018 Pixar
//
// Licensed under the Apache License, Version 2.0 (the "Apache License")
// with the following modification; you may not use this file except in
// compliance with the Apache License and the following modification to it:
// Section 6. Trademarks. is deleted and replaced with:
//
// 6. Trademarks. This License does not grant permission to use the trade
//    names, trademarks, service marks, or product names of the Licensor
//    and its affiliates, except as required to comply with Section 4(c) of
//    the License and to reproduce the content of the NOTICE file.
//
// You may obtain a copy of the Apache License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the Apache License with the above modification is
// distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied. See the Apache License for the specific
// language governing permissions and limitations under the Apache License.
//
#ifndef PXR_USD_PLUGIN_USD_MTLX_FILE_FORMAT_H
#define PXR_USD_PLUGIN_USD_MTLX_FILE_FORMAT_H
 
#include "pxr/pxr.h"
#include "pxr/usd/sdf/fileFormat.h"
#include "pxr/base/tf/staticTokens.h"

PXR_NAMESPACE_OPEN_SCOPE

#define USDMTLX_FILE_FORMAT_TOKENS    \
    ((Id,      "mtlx"))                         \
    ((Version, "1.0"))                          \
    ((Target,  "usd"))

TF_DECLARE_PUBLIC_TOKENS(UsdMtlxFileFormatTokens, USDMTLX_FILE_FORMAT_TOKENS);

TF_DECLARE_WEAK_AND_REF_PTRS(UsdMtlxFileFormat);

/// \class UsdMtlxFileFormat
///
class UsdMtlxFileFormat : public SdfFileFormat {
public:
    // SdfFileFormat overrides
    SdfAbstractDataRefPtr InitData(const FileFormatArguments&) const override;
    bool CanRead(const std::string &file) const override;
    bool Read(SdfLayer* layer,
              const std::string& resolvedPath,
              bool metadataOnly) const override;
    bool WriteToFile(const SdfLayer& layer,
                     const std::string& filePath,
                     const std::string& comment = std::string(),
                     const FileFormatArguments& args = 
                         FileFormatArguments()) const override;
    bool ReadFromString(SdfLayer* layer,
                        const std::string& str) const override;
    bool WriteToString(const SdfLayer& layer,
                       std::string* str,
                       const std::string& comment=std::string()) const override;
    bool WriteToStream(const SdfSpecHandle &spec,
                       std::ostream& out,
                       size_t indent) const override;

protected:
    SDF_FILE_FORMAT_FACTORY_ACCESS;

    UsdMtlxFileFormat();
    ~UsdMtlxFileFormat() override;
};

PXR_NAMESPACE_CLOSE_SCOPE

#endif // PXR_USD_PLUGIN_USD_MTLX_FILE_FORMAT_H