// Copyright 2023 The Dawn & Tint Authors
//
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// modification, are permitted provided that the following conditions are met:
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// 1. Redistributions of source code must retain the above copyright notice, this
//    list of conditions and the following disclaimer.
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// 2. Redistributions in binary form must reproduce the above copyright notice,
//    this list of conditions and the following disclaimer in the documentation
//    and/or other materials provided with the distribution.
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// 3. Neither the name of the copyright holder nor the names of its
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#include "dawn/native/d3d/SharedTextureMemoryD3D.h"

#include <utility>

#include "dawn/native/ChainUtils.h"
#include "dawn/native/d3d/D3DError.h"
#include "dawn/native/d3d/DeviceD3D.h"
#include "dawn/native/d3d/Forward.h"
#include "dawn/native/d3d/QueueD3D.h"
#include "dawn/native/d3d/SharedFenceD3D.h"

namespace dawn::native::d3d {

SharedTextureMemory::SharedTextureMemory(d3d::Device* device,
                                         const char* label,
                                         SharedTextureMemoryProperties properties)
    : SharedTextureMemoryBase(device, label, properties) {}

MaybeError SharedTextureMemory::BeginAccessImpl(
    TextureBase* texture,
    const UnpackedPtr<BeginAccessDescriptor>& descriptor) {
    DAWN_TRY(descriptor.ValidateSubset<>());
    for (size_t i = 0; i < descriptor->fenceCount; ++i) {
        SharedFenceBase* fence = descriptor->fences[i];

        SharedFenceExportInfo exportInfo;
        DAWN_TRY(fence->ExportInfo(&exportInfo));
        switch (exportInfo.type) {
            case wgpu::SharedFenceType::DXGISharedHandle:
                DAWN_INVALID_IF(!GetDevice()->HasFeature(Feature::SharedFenceDXGISharedHandle),
                                "Required feature (%s) for %s is missing.",
                                wgpu::FeatureName::SharedFenceDXGISharedHandle,
                                wgpu::SharedFenceType::DXGISharedHandle);
                break;
            default:
                return DAWN_VALIDATION_ERROR("Unsupported fence type %s.", exportInfo.type);
        }
    }
    return {};
}

ResultOrError<FenceAndSignalValue> SharedTextureMemory::EndAccessImpl(
    TextureBase* texture,
    UnpackedPtr<EndAccessState>& state) {
    DAWN_TRY(state.ValidateSubset<>());
    DAWN_INVALID_IF(!GetDevice()->HasFeature(Feature::SharedFenceDXGISharedHandle),
                    "Required feature (%s) is missing.",
                    wgpu::FeatureName::SharedFenceDXGISharedHandle);

    Ref<SharedFence> sharedFence;
    DAWN_TRY_ASSIGN(sharedFence, ToBackend(GetDevice()->GetQueue())->GetOrCreateSharedFence());

    return FenceAndSignalValue{
        std::move(sharedFence),
        static_cast<uint64_t>(texture->GetSharedTextureMemoryContents()->GetLastUsageSerial())};
}

}  // namespace dawn::native::d3d