utils.h

//
// Copyright 2016 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_USD_SHADE_UTILS_H
#define PXR_USD_USD_SHADE_UTILS_H

#include "pxr/pxr.h"
#include "pxr/usd/usdShade/api.h"
#include "pxr/usd/usdShade/types.h"
#include "pxr/usd/sdf/path.h"
#include "pxr/usd/usd/attribute.h"

#include "pxr/base/tf/smallVector.h"
#include "pxr/base/tf/token.h"

#include <string>
#include <utility>

PXR_NAMESPACE_OPEN_SCOPE

class UsdShadeInput;
class UsdShadeOutput;
struct UsdShadeConnectionSourceInfo;

class UsdShadeUtils {
public:
    USDSHADE_API
    static std::string GetPrefixForAttributeType(
        UsdShadeAttributeType sourceType);

    USDSHADE_API
    static SdfPath 
    GetConnectedSourcePath(const UsdShadeConnectionSourceInfo &srcInfo);

    USDSHADE_API
    static std::pair<TfToken, UsdShadeAttributeType> 
        GetBaseNameAndType(const TfToken &fullName);

    USDSHADE_API
    static UsdShadeAttributeType GetType(const TfToken &fullName);

    USDSHADE_API
    static TfToken GetFullName(const TfToken &baseName, 
                               const UsdShadeAttributeType type);

    USDSHADE_API
    static UsdShadeAttributeVector GetValueProducingAttributes(
        UsdShadeInput const &input,
        bool shaderOutputsOnly = false);
    USDSHADE_API
    static UsdShadeAttributeVector GetValueProducingAttributes(
        UsdShadeOutput const &output,
        bool shaderOutputsOnly = false);
};

PXR_NAMESPACE_CLOSE_SCOPE

#endif