//
// Copyright 2020 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.
//
#include "pxr/imaging/hdSt/subtextureIdentifier.h"

#include <boost/functional/hash.hpp>

PXR_NAMESPACE_OPEN_SCOPE

////////////////////////////////////////////////////////////////////////////
// HdStSubtextureIdentifier

HdStSubtextureIdentifier::~HdStSubtextureIdentifier() = default;

HdStSubtextureIdentifier::ID
HdStSubtextureIdentifier::Hash() const {
    static ID result = TfToken().Hash();
    return result;
}

////////////////////////////////////////////////////////////////////////////
// HdStVdbSubtextureIdentifier

HdStVdbSubtextureIdentifier::HdStVdbSubtextureIdentifier(
    TfToken const &gridName)
 : _gridName(gridName)
{
}

HdStVdbSubtextureIdentifier::~HdStVdbSubtextureIdentifier() = default;

std::unique_ptr<HdStSubtextureIdentifier>
HdStVdbSubtextureIdentifier::Clone() const
{
    return std::make_unique<HdStVdbSubtextureIdentifier>(GetGridName());
}

HdStSubtextureIdentifier::ID
HdStVdbSubtextureIdentifier::Hash() const
{
    static ID typeHash = TfToken("vdb").Hash();

    ID hash = typeHash;
    boost::hash_combine(hash, _gridName.Hash());

    return hash;
}

////////////////////////////////////////////////////////////////////////////
// HdStUvOrientationSubtextureIdentifier

HdStUvOrientationSubtextureIdentifier::HdStUvOrientationSubtextureIdentifier(
    const bool flipVertically)
 : _flipVertically(flipVertically)
{
}

HdStUvOrientationSubtextureIdentifier::~HdStUvOrientationSubtextureIdentifier()
    = default;

std::unique_ptr<HdStSubtextureIdentifier>
HdStUvOrientationSubtextureIdentifier::Clone() const
{
    return std::make_unique<HdStUvOrientationSubtextureIdentifier>(
        GetFlipVertically());
}

HdStSubtextureIdentifier::ID
HdStUvOrientationSubtextureIdentifier::Hash() const
{
    static ID vertFlipFalse = TfToken("notVerticallyFlipped").Hash();
    static ID vertFlipTrue = TfToken("verticallyFlipped").Hash();

    if (GetFlipVertically()) {
        return vertFlipTrue;
    } else {
        return vertFlipFalse;
    }
}

HdStDynamicUvSubtextureIdentifier::HdStDynamicUvSubtextureIdentifier()
    = default;

HdStDynamicUvSubtextureIdentifier::~HdStDynamicUvSubtextureIdentifier()
    = default;

std::unique_ptr<HdStSubtextureIdentifier>
HdStDynamicUvSubtextureIdentifier::Clone() const
{
    return std::make_unique<HdStDynamicUvSubtextureIdentifier>();
}

HdStSubtextureIdentifier::ID
HdStDynamicUvSubtextureIdentifier::Hash() const
{
    static ID result = TfToken("dynamicTexture").Hash();
    return result;
}

PXR_NAMESPACE_CLOSE_SCOPE