Function getConversionPreview

src/utils/cameraModelConversions.ts:213–248

(
  camera: Camera,
  targetModelId: CameraModelId,
  threshold: number = DEFAULT_CONVERSION_THRESHOLD
)

 * @returns Preview information or null if conversion is incompatible
 */
export function getConversionPreview(
  camera: Camera,
  targetModelId: CameraModelId,
  threshold: number = DEFAULT_CONVERSION_THRESHOLD
): ConversionPreview | null {
  const result = convertCameraModel(camera, targetModelId, threshold);

  if (result.type === 'incompatible') {
    return null;
  }

  const sourceParamNames = PARAM_NAMES[camera.modelId] ?? [];
  const targetParamNames = PARAM_NAMES[targetModelId] ?? [];

  const { characterization, isLossy, isExpansion, description } = characterizeCameraModelConversion({
    fromModel: camera.modelId,
    toModel: targetModelId,
    sourceParams: camera.params,
    targetParams: result.params,
    resultType: result.type,
    threshold,
    aspectRatioThreshold: ASPECT_RATIO_THRESHOLD,
  });

  return {
    sourceParamNames,
    sourceParams: [...camera.params],
    targetParamNames,
    targetParams: result.params,
    characterization,
    isLossy,
    isExpansion,
    description,
    warning: result.type === 'approximate' ? result.warning : undefined,
  };
}