//
// 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 <Metal/Metal.h>

#include "pxr/imaging/hgiMetal/conversions.h"
#include "pxr/imaging/hgiMetal/diagnostic.h"
#include "pxr/imaging/hgiMetal/hgi.h"
#include "pxr/imaging/hgiMetal/sampler.h"

PXR_NAMESPACE_OPEN_SCOPE


HgiMetalSampler::HgiMetalSampler(HgiMetal *hgi, HgiSamplerDesc const& desc)
    : HgiSampler(desc)
    , _samplerId(nil)
    , _label(nil)
{
    MTLSamplerDescriptor* smpDesc = [MTLSamplerDescriptor new];

    smpDesc.sAddressMode =
        HgiMetalConversions::GetSamplerAddressMode(desc.addressModeU);
    smpDesc.tAddressMode =
        HgiMetalConversions::GetSamplerAddressMode(desc.addressModeV);
    smpDesc.rAddressMode =
        HgiMetalConversions::GetSamplerAddressMode(desc.addressModeW);
    smpDesc.minFilter = HgiMetalConversions::GetMinMagFilter(desc.magFilter);
    smpDesc.magFilter = HgiMetalConversions::GetMinMagFilter(desc.minFilter);
    smpDesc.mipFilter = HgiMetalConversions::GetMipFilter(desc.mipFilter);
    
    HGIMETAL_DEBUG_LABEL(smpDesc, _descriptor.debugName.c_str());
    
    _samplerId= [hgi->GetPrimaryDevice() newSamplerStateWithDescriptor:smpDesc];
}

HgiMetalSampler::~HgiMetalSampler()
{
    if (_label) {
        [_label release];
        _label = nil;
    }

    if (_samplerId != nil) {
        [_samplerId release];
        _samplerId = nil;
    }
}

uint64_t
HgiMetalSampler::GetRawResource() const
{
    return (uint64_t) _samplerId;
}

id<MTLSamplerState>
HgiMetalSampler::GetSamplerId() const
{
    return _samplerId;
}

PXR_NAMESPACE_CLOSE_SCOPE