// Copyright 2016 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef SERVICES_VIZ_PUBLIC_CPP_COMPOSITING_COMPOSITOR_FRAME_MOJOM_TRAITS_H_
#define SERVICES_VIZ_PUBLIC_CPP_COMPOSITING_COMPOSITOR_FRAME_MOJOM_TRAITS_H_

#include <vector>

#include "base/debug/dump_without_crashing.h"
#include "base/types/expected.h"
#include "components/viz/common/quads/compositor_frame.h"
#include "mojo/public/cpp/bindings/deserialization_error.h"
#include "services/viz/public/cpp/compositing/compositor_frame_metadata_mojom_traits.h"
#include "services/viz/public/cpp/compositing/compositor_render_pass_mojom_traits.h"
#include "services/viz/public/cpp/compositing/transferable_resource_mojom_traits.h"
#include "services/viz/public/mojom/compositing/compositor_frame.mojom-shared.h"

namespace mojo {

template <>
struct StructTraits<viz::mojom::CompositorFrameDataView, viz::CompositorFrame> {
  static const viz::CompositorFrameMetadata& metadata(
      const viz::CompositorFrame& input) {
    return input.metadata;
  }

  static const std::vector<viz::TransferableResource>& resources(
      const viz::CompositorFrame& input) {
    return input.resource_list;
  }

  static const viz::CompositorRenderPassList& passes(
      const viz::CompositorFrame& input) {
    DCHECK(!input.render_pass_list.empty());
    DCHECK(!input.render_pass_list.back()->output_rect.size().IsEmpty());
    // We seem to continuously have issues with clients not setting up the root
    // render pass correctly. This DumpWithoutCrashing should help us catch
    // regressions.
    if (input.render_pass_list.empty() ||
        input.render_pass_list.back()->output_rect.size().IsEmpty()) {
      base::debug::DumpWithoutCrashing();
    }
    return input.render_pass_list;
  }

  static base::expected<void, DeserializationError> Read(
      viz::mojom::CompositorFrameDataView data,
      viz::CompositorFrame* out);
};

}  // namespace mojo

#endif  // SERVICES_VIZ_PUBLIC_CPP_COMPOSITING_COMPOSITOR_FRAME_MOJOM_TRAITS_H_