// Copyright 2023 The Dawn & Tint Authors
//
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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
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#include "src/dawn/native/d3d/SharedTextureMemoryD3D.h"

#include <utility>

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

namespace dawn::native::d3d {

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

MaybeError SharedTextureMemory::BeginAccessImpl(
    TextureBase* texture,
    const UnpackedPtr<BeginAccessDescriptor>& descriptor) {
    DAWN_TRY((descriptor.ValidateSubset<SharedTextureMemoryD3DSwapchainBeginState,
                                        SharedTextureMemoryD3D11BeginState>()));
    for (SharedFenceBase* fence : descriptor->fences) {
        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,
    ExecutionSerial lastUsageSerial,
    UnpackedPtr<EndAccessState>& state) {
    DAWN_TRY(state.ValidateSubset<>());

    if (!GetDevice()->HasFeature(Feature::SharedFenceDXGISharedHandle)) {
        return FenceAndSignalValue{nullptr, 0};
    }

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

    return FenceAndSignalValue{std::move(sharedFence), static_cast<uint64_t>(lastUsageSerial)};
}

}  // namespace dawn::native::d3d