src/tint/api/common/bindings.h

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#ifndef SRC_TINT_API_COMMON_BINDINGS_H_
#define SRC_TINT_API_COMMON_BINDINGS_H_

#include <unordered_map>

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

namespace tint {

/// An external texture
struct ExternalTexture {
    /// Metadata
    BindingPoint metadata{};
    /// Plane0 binding data
    BindingPoint plane0{};
    /// Plane1 binding data
    BindingPoint plane1{};

    /// Reflect the fields of this class so that it can be used by tint::ForeachField()
    TINT_REFLECT(ExternalTexture, metadata, plane0, plane1);

    TINT_REFLECT_EQUALS(ExternalTexture);
    TINT_REFLECT_HASH_CODE(ExternalTexture);
};

using BindingMap = std::unordered_map<BindingPoint, BindingPoint>;
using ExternalTextureBindings = std::unordered_map<BindingPoint, ExternalTexture>;

/// Binding information
struct Bindings {
    /// Uniform bindings
    BindingMap uniform{};
    /// Storage bindings
    BindingMap storage{};
    /// Texture bindings
    BindingMap texture{};
    /// Storage texture bindings
    BindingMap storage_texture{};
    /// Sampler bindings
    BindingMap sampler{};
    /// External bindings
    ExternalTextureBindings external_texture{};
    /// Input attachment bindings
    BindingMap input_attachment{};

    /// Reflect the fields of this class so that it can be used by tint::ForeachField()
    TINT_REFLECT(Bindings,
                 uniform,
                 storage,
                 texture,
                 storage_texture,
                 sampler,
                 external_texture,
                 input_attachment);

    TINT_REFLECT_EQUALS(Bindings);
    TINT_REFLECT_HASH_CODE(Bindings);
};

}  // namespace tint

#endif  // SRC_TINT_API_COMMON_BINDINGS_H_