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#ifndef SRC_TINT_API_OPTIONS_EXTERNAL_TEXTURE_H_
#define SRC_TINT_API_OPTIONS_EXTERNAL_TEXTURE_H_

#include <unordered_map>

#include "src/tint/api/common/binding_point.h"

namespace tint {

/// Options used to specify mappings of binding points for external textures.
struct ExternalTextureOptions {
    /// This struct identifies the binding groups and locations for new bindings to
    /// use when transforming a texture_external instance.
    struct BindingPoints {
        /// The desired binding location of the texture_2d representing plane #1 when
        /// a texture_external binding is expanded.
        BindingPoint plane_1;
        /// The desired binding location of the ExternalTextureParams uniform when a
        /// texture_external binding is expanded.
        BindingPoint params;

        /// Reflect the fields of this class so that it can be used by tint::ForeachField()
        TINT_REFLECT(BindingPoints, plane_1, params);
    };

    /// BindingsMap is a map where the key is the binding location of a
    /// texture_external and the value is a struct containing the desired
    /// locations for new bindings expanded from the texture_external instance.
    using BindingsMap = std::unordered_map<BindingPoint, BindingPoints>;

    /// A map of new binding points to use.
    BindingsMap bindings_map;

    /// Reflect the fields of this class so that it can be used by tint::ForeachField()
    TINT_REFLECT(ExternalTextureOptions, bindings_map);
};

}  // namespace tint

#endif  // SRC_TINT_API_OPTIONS_EXTERNAL_TEXTURE_H_