// Copyright 2023 The Dawn & Tint Authors
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this
//    list of conditions and the following disclaimer.
//
// 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.
//
// 3. Neither the name of the copyright holder nor the names of its
//    contributors may be used to endorse or promote products derived from
//    this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

#include "src/dawn/native/d3d11/PlatformFunctionsD3D11.h"

#include <string>

namespace dawn::native::d3d11 {

PlatformFunctions::PlatformFunctions() = default;
PlatformFunctions::~PlatformFunctions() = default;

MaybeError PlatformFunctions::Initialize(std::span<const std::string> searchPaths) {
    DAWN_TRY(Base::Initialize());

    // Load FX compiler unconditionally since that's the only compiler we can use for D3D11.
    DAWN_TRY(EnsureFXC(searchPaths));

    DAWN_TRY(LoadD3D11());
    return {};
}

MaybeError PlatformFunctions::LoadD3D11() {
#if DAWN_PLATFORM_IS(WINUWP)
    d3d11CreateDevice = &D3D11CreateDevice;
#else
    std::string error;
    if (!mD3D11Lib.OpenSystemLibrary(L"d3d11.dll", &error) ||
        !mD3D11Lib.GetProc(&d3d11CreateDevice, "D3D11CreateDevice", &error)) {
        return DAWN_INTERNAL_ERROR(error.c_str());
    }
#endif

    return {};
}

}  // namespace dawn::native::d3d11