Coil3 ImageLoader set bitmap config not work

[Caij]

version：3.0.0-alpha6

init

 ImageLoader.Builder(this).bitmapConfig(Bitmap.Config.RGB_565)

EngineInterceptor

val options = requestService.options(request, size)

private fun ImageRequest.resolveExtras(size: Size): Extras {
        var bitmapConfig = bitmapConfig //RGB_565
        var allowRgb565 = allowRgb565

        // Fall back to ARGB_8888 if the requested bitmap config does not pass the checks.
        if (!isBitmapConfigValidMainThread(this, size)) {
            bitmapConfig = Bitmap.Config.ARGB_8888
        }

        // Disable allowRgb565 if there are transformations or the requested config is ALPHA_8.
        // ALPHA_8 is a mask config where each pixel is 1 byte so it wouldn't make sense to use
        // RGB_565 as an optimization in that case.
        allowRgb565 = allowRgb565 &&
            transformations.isEmpty() &&
            bitmapConfig != Bitmap.Config.ALPHA_8

        var builder: Extras.Builder? = null
        if (bitmapConfig != this.bitmapConfig) {  // **not reset**
            builder = extras.newBuilder().set(Extras.Key.bitmapConfig, bitmapConfig)
        }
        if (allowRgb565 != this.allowRgb565) {
            builder = (builder ?: extras.newBuilder()).set(Extras.Key.allowRgb565, allowRgb565)
        }
        return builder?.build() ?: extras
    }

val options = requestService.options(request, size)

there are return request.extras, options.extras is empty, request.defaults.extras have init config value
so new decode read options bitmap config is DEFAULT_BITMAP_CONFIG

BitmapFactoryDecoder

private fun BitmapFactory.Options.configureConfig(exifData: ExifData) {
        var config = options.bitmapConfig

        // Disable hardware bitmaps if we need to perform EXIF transformations.
        if (exifData.isFlipped || exifData.isRotated) {
            config = config.toSoftware()
        }

        // Decode the image as RGB_565 as an optimization if allowed.
        if (options.allowRgb565 && config == Bitmap.Config.ARGB_8888 && outMimeType == MIME_TYPE_JPEG) {
            config = Bitmap.Config.RGB_565
        }

        // High color depth images must be decoded as either RGBA_F16 or HARDWARE.
        if (SDK_INT >= 26 && outConfig == Bitmap.Config.RGBA_F16 && config != Bitmap.Config.HARDWARE) {
            config = Bitmap.Config.RGBA_F16
        }

        inPreferredConfig = config
    }