"""Apple IIGS Super Hi-Res: 320x200, 16 colours/line from 16 palettes of 4096."""
from __future__ import annotations

from ...convert.base import Conversion
from . import _common

WIDTH, HEIGHT = 320, 200
PIXEL_ASPECT = 1.0


def convert(img_rgb, palette_name="iigs", dither_mode="floyd",
            intensive=False, base_color=None):
    block, preview, err = _common.encode(img_rgb, dither_mode, mono=False)
    return Conversion(
        mode="shr", width=WIDTH, height=HEIGHT, pixel_aspect=PIXEL_ASPECT,
        index_image=None, data=block, data_addr=0x2000, viewer="iigs",
        preview_rgb=preview, error=err,
        meta={"palette": "iigs", "dither": dither_mode},
    )