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Add Inkplate 6COLOR (7-color ACeP) support #88

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Add Inkplate 6COLOR (7-color ACeP) support #88

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aa7b490
Map Inkplate 6COLOR (0x0043, BWGBRYO) to INKPLATE_6COLOR palette
brandon-dacrib Jun 18, 2026
eab6620
encode_image: support BWGBRYO (7-color ACeP) as 4bpp identity
brandon-dacrib Jun 18, 2026
7a52460
Handle optional Inkplate dithering support
brandon-dacrib Jun 18, 2026
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9 changes: 9 additions & 0 deletions src/opendisplay/display_palettes.py
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Original file line number Diff line number Diff line change
@@ -1,5 +1,8 @@
"""Automatic measured palette selection and panel capability data for e-paper displays."""

from typing import cast

import epaper_dithering as _epaper_dithering
from epaper_dithering import (
BWRY_3_97,
MONO_4_26,
Expand All @@ -9,6 +12,7 @@
ColorScheme,
)

INKPLATE_6COLOR = cast(ColorPalette | None, getattr(_epaper_dithering, "INKPLATE_6COLOR", None))
# Panel IDs that support 4-gray mode (from firmware mapEpd)
PANELS_4GRAY: frozenset[int] = frozenset(
{
Expand Down Expand Up @@ -59,6 +63,11 @@ def get_gray4_codes(panel_ic_type: int | None) -> tuple[int, int, int, int]:
# (?, ColorScheme.BWY): HANSHOW_BWY,
}

_BWGBRYO = cast(ColorScheme | None, getattr(ColorScheme, "BWGBRYO", None))
if _BWGBRYO is not None and INKPLATE_6COLOR is not None:
# Inkplate 6COLOR 7-color ACeP (EP585C_600x448 / panel_ic_type 0x0043)
DISPLAY_PALETTE_MAP[(0x0043, _BWGBRYO)] = INKPLATE_6COLOR


def get_palette_for_display(
panel_ic_type: int | None,
Expand Down
4 changes: 4 additions & 0 deletions src/opendisplay/encoding/images.py
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Original file line number Diff line number Diff line change
Expand Up @@ -87,6 +87,10 @@ def encode_image(
# 6-color Spectra 6 display uses 4bpp with special firmware values
# Palette indices 0-5 map to firmware values 0,1,2,3,5,6 (4 is skipped!)
return encode_4bpp(image, bwgbry_mapping=True)
if color_scheme == getattr(ColorScheme, "BWGBRYO", None):
# 7-color ACeP (Inkplate 6COLOR) uses 4bpp. The BWGBRYO palette is already
# ordered to the panel's native nibble codes (0..6), so indices map directly.
return encode_4bpp(image)
if color_scheme == ColorScheme.GRAYSCALE_4:
return encode_2bpp(image)
if color_scheme == ColorScheme.GRAYSCALE_16:
Expand Down