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#ifndef SRC_TINT_LANG_HLSL_WRITER_RAISE_ARRAY_OFFSET_FROM_UNIFORM_H_
#define SRC_TINT_LANG_HLSL_WRITER_RAISE_ARRAY_OFFSET_FROM_UNIFORM_H_

#include <unordered_map>

#include "src/tint/api/common/binding_point.h"
#include "src/tint/lang/core/ir/validator.h"
#include "src/tint/utils/result.h"

// Forward declarations.
namespace tint::core::ir {
class Module;
}

namespace tint::hlsl::writer::raise {

/// The capabilities that the transform can support.
const core::ir::Capabilities kArrayOffsetFromUniformCapabilities{
    core::ir::Capability::kAllow8BitIntegers,
    core::ir::Capability::kAllow16BitIntegers,
    core::ir::Capability::kAllowClipDistancesOnF32ScalarAndVector,
    core::ir::Capability::kAllowDuplicateBindings,
    core::ir::Capability::kAllowNonCoreTypes,
};

/// ArrayOffsetFromUniform is a transform that adds an offset to storage buffer loads and stores
/// provided via a uniform buffer.
///
/// The generated uniform buffer will have the form:
/// ```
/// @group(0) @binding(30)
/// var<uniform> buffer_offset_ubo : array<u32, 8>;
/// ```
/// The binding group and number used for this uniform buffer is provided via the transform config.
/// The transform config also defines the mapping from a storage buffer's `BindingPoint` to the
/// element index that will be used to get the offset of that buffer.
///
/// @param module the module to transform
/// @param ubo_binding the binding point to use for the uniform buffer
/// @param bindpoint_to_offset_index the map from binding point to an index which holds the offset
/// @returns the transform result or failure
Result<SuccessType> ArrayOffsetFromUniform(
    core::ir::Module& module,
    BindingPoint ubo_binding,
    const std::unordered_map<BindingPoint, uint32_t>& bindpoint_to_offset_index);

}  // namespace tint::hlsl::writer::raise

#endif  // SRC_TINT_LANG_HLSL_WRITER_RAISE_ARRAY_OFFSET_FROM_UNIFORM_H_
