export type RawPtr = number & { __type: 'Hdr2Png.RawPtr' };
export type Bool = 0 | 1;
export const enum Operation {
    MergeMetallicRoughness = 0,
    AlphaToTransmission = 1,
    RemoveAlpha = 2,
    HdrToRgbe = 4,
    SplitChromaLightmap = 5,
    MergeColorAlpha = 6,
    MergeWhiteAlpha = 7,
    GgxPrefilterHdr = 8,
    DiffuseIrradiance = 9,
    PrecomputeGgxDfg = 10,
    Resample = 11,
    FilterNormalMap = 12,
}

export const enum Result {
    Success = 0,
    OutOfMemory = -1,
    ValidationFailure = -2,
    InvalidInput = -3,
    ConversionFailed = -4,
    OutputUnavailable = -5,
    UnsupportedFormat = -6,
    OutOfBounds = -7,
    InvalidOperation = -8,
}

export interface IHdr2Png {
    _begin(): void;
    _allocInput(idxInput: number, byteLength: number): RawPtr;
    _execute(operation: Operation): Result;
    _getOutputSize(idxOutput: number): number;
    _getOutputPtr(idxOutput: number): RawPtr;
    _getParameterBuffer(): RawPtr;

    readonly HEAPU8: Uint8Array;
    readonly HEAPF32: Float32Array;
    readonly wasmMemory: WebAssembly.Memory;
}

export interface InstantiateOptions {
    wasmMemory: WebAssembly.Memory;
}

function Instantiate(options: InstantiateOptions): Promise<IHdr2Png>;

export = Instantiate;