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lv_img_conv: Add CF_TRUE_COLOR output #2458

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lv_img_conv: Add CF_TRUE_COLOR output #2458

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25 changes: 23 additions & 2 deletions 25 src/resources/lv_img_conv.py
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Original file line number Diff line number Diff line change
Expand Up @@ -79,12 +79,12 @@ def main():
if args.force:
print(f"overwriting {args.output_file}")
else:
pritn(f"Error: refusing to overwrite {args.output_file} without -f specified.")
print(f"Error: refusing to overwrite {args.output_file} without -f specified.")
return 1
out.touch()

# only implemented the bare minimum, everything else is not implemented
if args.color_format not in ["CF_INDEXED_1_BIT", "CF_TRUE_COLOR_ALPHA"]:
if args.color_format not in ["CF_INDEXED_1_BIT", "CF_TRUE_COLOR", "CF_TRUE_COLOR_ALPHA"]:
raise NotImplementedError(f"argument --color-format '{args.color_format}' not implemented")
if args.output_format != "bin":
raise NotImplementedError(f"argument --output-format '{args.output_format}' not implemented")
Expand All @@ -105,6 +105,9 @@ def main():
# 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_TRUE_COLOR" and img.mode != "RGB":
# CF_TRUE_COLOR carries no alpha, so drop any it may have
img = img.convert(mode="RGB")
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")
Expand Down Expand Up @@ -138,6 +141,22 @@ def main():
buf[i + 1] = c16 & 0xFF
buf[i + 2] = a

elif args.color_format == "CF_TRUE_COLOR" and args.binary_format == "ARGB8565_RBSWAP":
buf = bytearray(img_height*img_width*2) # 2 bytes (16 bit) per pixel
for y in range(img_height):
for x in range(img_width):
i = (y*img_width + x)*2 # buffer-index
pixel = img.getpixel((x,y))
r_act = classify_pixel(pixel[0], 5)
g_act = classify_pixel(pixel[1], 6)
b_act = classify_pixel(pixel[2], 5)
r_act = min(r_act, 0xF8)
g_act = min(g_act, 0xFC)
b_act = min(b_act, 0xF8)
c16 = ((r_act) << 8) | ((g_act) << 3) | ((b_act) >> 3) # RGB565
buf[i + 0] = (c16 >> 8) & 0xFF
buf[i + 1] = c16 & 0xFF

elif args.color_format == "CF_INDEXED_1_BIT": # ignore binary format, use color format as binary format
w = img_width >> 3
if img_width & 0x07:
Expand Down Expand Up @@ -168,6 +187,8 @@ def main():

# write header
match args.color_format:
case "CF_TRUE_COLOR":
lv_cf = 4
case "CF_TRUE_COLOR_ALPHA":
lv_cf = 5
case "CF_INDEXED_1_BIT":
Expand Down
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