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lv_img_conv: support other modes like 'P'

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Support other image modes like `P`, which uses 8 bits per pixel and a
color palette to save space.

Luckily the Pillow module can do the mode conversion for us.

Fixes: https://github.com/InfiniTimeOrg/InfiniTime/issues/1985
This commit is contained in:
Reinhold Gschweicher 2024-01-21 21:23:35 +01:00 committed by NeroBurner
parent 034d83fe6b
commit a481af06cf
1 changed files with 8 additions and 1 deletions
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9
src/resources/lv_img_conv.py
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@ -101,6 +101,13 @@ def main():
img = Image.open(img_path)
img_height = img.height
img_width = img.width
if args.color_format == "CF_TRUE_COLOR_ALPHA" and img.mode != "RGBA":
# support pictures stored in other formats like with a color palette 'P'
# see: https://pillow.readthedocs.io/en/stable/handbook/concepts.html#modes
img = img.convert(mode="RGBA")
elif args.color_format == "CF_INDEXED_1_BIT" and img.mode != "L":
# for CF_INDEXED_1_BIT we need just a grayscale value per pixel
img = img.convert(mode="L")
if args.color_format == "CF_TRUE_COLOR_ALPHA" and args.binary_format == "ARGB8888":
buf = bytearray(img_height*img_width*4) # 4 bytes (32 bit) per pixel
for y in range(img_height):
@ -140,7 +147,7 @@ def main():
for y in range(img_height):
for x in range(img_width):
c, a = img.getpixel((x,y))
c = img.getpixel((x,y))
p = w * y + (x >> 3) + 8 # +8 for the palette
buf[p] |= (c & 0x1) << (7 - (x & 0x7))
# write palette information, for indexed-1-bit we need palette with two values