// Copyright 2021 The Dawn Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#include "tests/DawnTest.h"

namespace {

    wgpu::Texture Create2DTexture(wgpu::Device device,
                                  uint32_t width,
                                  uint32_t height,
                                  wgpu::TextureFormat format,
                                  wgpu::TextureUsage usage) {
        wgpu::TextureDescriptor descriptor;
        descriptor.dimension = wgpu::TextureDimension::e2D;
        descriptor.size.width = width;
        descriptor.size.height = height;
        descriptor.size.depthOrArrayLayers = 1;
        descriptor.sampleCount = 1;
        descriptor.format = format;
        descriptor.mipLevelCount = 1;
        descriptor.usage = usage;
        return device.CreateTexture(&descriptor);
    }

    class ExternalTextureTests : public DawnTest {
      protected:
        static constexpr uint32_t kWidth = 4;
        static constexpr uint32_t kHeight = 4;
        static constexpr wgpu::TextureFormat kFormat = wgpu::TextureFormat::RGBA8Unorm;
        static constexpr wgpu::TextureUsage kSampledUsage = wgpu::TextureUsage::Sampled;
    };
}  // anonymous namespace

TEST_P(ExternalTextureTests, CreateExternalTextureSuccess) {
    DAWN_TEST_UNSUPPORTED_IF(UsesWire());

    wgpu::Texture texture = Create2DTexture(device, kWidth, kHeight, kFormat, kSampledUsage);

    // Create a texture view for the external texture
    wgpu::TextureView view = texture.CreateView();

    // Create an ExternalTextureDescriptor from the texture view
    wgpu::ExternalTextureDescriptor externalDesc;
    externalDesc.plane0 = view;
    externalDesc.format = kFormat;

    // Import the external texture
    wgpu::ExternalTexture externalTexture = device.CreateExternalTexture(&externalDesc);

    ASSERT_NE(externalTexture.Get(), nullptr);
}

DAWN_INSTANTIATE_TEST(ExternalTextureTests,
                      D3D12Backend(),
                      MetalBackend(),
                      OpenGLBackend(),
                      OpenGLESBackend(),
                      VulkanBackend());