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#ifndef SRC_TINT_LANG_CORE_IR_TRANSFORM_MULTIPLANAR_OPTIONS_H_
#define SRC_TINT_LANG_CORE_IR_TRANSFORM_MULTIPLANAR_OPTIONS_H_

#include <unordered_map>

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

namespace tint::transform::multiplanar {

/// This struct identifies the binding groups and locations for new bindings to
/// use when transforming a multiplanar texture_external instance.
struct MultiplanarTexture {
    /// 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(MultiplanarTexture, plane_1, params);
};

/// This struct identifies the binding groups and locations for new bindings to
/// use when transforming a YCBcr texture_external instance.
struct YCBCRTexture {
    /// The desired binding location of the sampler when a texture_external binding is expanded.
    BindingPoint sampler;
    /// 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(YCBCRTexture, sampler, 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, std::variant<MultiplanarTexture, YCBCRTexture>>;

}  // namespace tint::transform::multiplanar

#endif  // SRC_TINT_LANG_CORE_IR_TRANSFORM_MULTIPLANAR_OPTIONS_H_
