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// Copyright 2024 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CC_TILES_TILING_INTERNAL_H_
#define CC_TILES_TILING_INTERNAL_H_
#include <concepts>
#include "cc/base/tiling_data.h"
#include "cc/tiles/tile_index.h"
#include "ui/gfx/geometry/axis_transform2d.h"
#include "ui/gfx/geometry/size.h"
namespace cc::internal {
// A tile-like type needs to expose whether or not its ready to draw, as this
// influences coverage iteration.
template <typename T>
concept TileLike = requires(const T t) {
{ t.IsReadyToDraw() } -> std::same_as<bool>;
};
// For a type to be used as a tiling by TilingCoverageIterator and
// TilingSetCoverageIterator it must present a nested Tile type and a few common
// methods.
template <typename T>
concept Tiling = requires(const T t, const TileIndex& index) {
typename T::Tile;
requires TileLike<typename T::Tile>;
{ t.TileAt(index) } -> std::same_as<typename T::Tile*>;
{ t.contents_scale_key() } -> std::same_as<float>;
{ t.tiling_data() } -> std::same_as<const TilingData*>;
{ t.raster_size() } -> std::same_as<gfx::Size>;
{ t.raster_transform() } -> std::same_as<const gfx::AxisTransform2d&>;
};
} // namespace cc::internal
#endif // CC_TILES_TILING_INTERNAL_H_
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