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New and improved converter

This commit is contained in:
Casey 2024-01-18 15:08:13 +03:00
parent bd9d88e12c
commit c917da78cb
Signed by: hkc
GPG Key ID: F0F6CFE11CDB0960
1 changed files with 147 additions and 32 deletions

179
cc-pic.py
View File

@ -1,9 +1,10 @@
#!/usr/bin/env python3
# x-run: python3 % ~/downloads/kanade/6bf3cdae12b75326e3c23af73105e5781e42e94e.jpg n25.cpi
from typing import BinaryIO, TextIO
from PIL import Image
from sys import argv
from argparse import ArgumentParser, RawTextHelpFormatter
from textwrap import dedent
class Converter:
CC_COLORS = [
@ -25,17 +26,15 @@ class Converter:
("f", "colors.black"),
]
PIX_BITS = [
[ 1, 2 ],
[ 4, 8 ],
[ 16, 0 ]
]
PIX_BITS = [[1, 2], [4, 8], [16, 0]]
MAX_DIFF = (3 ** 0.5) * 255
MAX_DIFF = (3**0.5) * 255
def __init__(self, image: Image.Image):
self._img = image.convert("P", palette=Image.ADAPTIVE, colors=16)
self._palette: list[int] = self._img.getpalette() # type: ignore
self._palette: list[int] = self._img.getpalette() or []
if len(self._palette) < 16 * 3:
self._palette += [0] * ((16 * 3) - len(self._palette))
def _brightness(self, i: int) -> float:
r, g, b = self._palette[i * 3 : (i + 1) * 3]
@ -44,7 +43,9 @@ class Converter:
def _distance(self, a: int, b: int) -> float:
r1, g1, b1 = self._palette[a * 3 : (a + 1) * 3]
r2, g2, b2 = self._palette[b * 3 : (b + 1) * 3]
return ((r1 - r2) ** 2 + (g1 - g2) ** 2 + (b1 - b2) ** 2) ** 0.5 / self.MAX_DIFF
return (
(r1 - r2) ** 2 + (g1 - g2) ** 2 + (b1 - b2) ** 2
) ** 0.5 / self.MAX_DIFF
def _get_colors(self, x: int, y: int) -> tuple[int, int]:
brightest_i, brightest_l = 0, 0
@ -67,7 +68,9 @@ class Converter:
out: int = 0
for oy, line in enumerate(self.PIX_BITS):
for ox, bit in enumerate(line):
if not self._is_darker(dark_i, bri_i, self._img.getpixel((x + ox, y + oy))):
if not self._is_darker(
dark_i, bri_i, self._img.getpixel((x + ox, y + oy))
):
out |= bit
# bottom right pixel fix?
if self._is_darker(dark_i, bri_i, self._img.getpixel((x + 1, y + 2))):
@ -82,10 +85,7 @@ class Converter:
for y in range(0, self._img.height - 2, 3):
for x in range(0, self._img.width - 1, 2):
ch, bg, fg = self._get_block(x, y)
io.write(bytes([
(ch + 0x80) & 0xFF,
fg << 4 | bg
]))
io.write(bytes([(ch + 0x80) & 0xFF, fg << 4 | bg]))
def export(self, io: TextIO):
io.write("local m = peripheral.find('monitor')\n")
@ -95,7 +95,9 @@ class Converter:
io.write("-- configuring palette\n")
for i in range(16):
r, g, b = self._palette[i * 3 : (i + 1) * 3]
io.write(f"m.setPaletteColor({self.CC_COLORS[i][1]}, 0x{r:02x}{g:02x}{b:02x})\n")
io.write(
f"m.setPaletteColor({self.CC_COLORS[i][1]}, 0x{r:02x}{g:02x}{b:02x})\n"
)
io.write("\n")
io.write("-- writing pixels\n")
@ -109,23 +111,136 @@ class Converter:
s.append(ch + 0x80)
bgs += self.CC_COLORS[bg][0]
fgs += self.CC_COLORS[fg][0]
io.write("m.blit(string.char(%s), '%s', '%s')\n" % (
str.join(", ", map(str, s)),
fgs,
bgs
))
io.write(
"m.blit(string.char(%s), '%s', '%s')\n"
% (str.join(", ", map(str, s)), fgs, bgs)
)
def main(fp_in, fp_out):
size = 143 * 2, 81 * 3 # 286, 243
with Image.new("RGB", size) as canv:
with Image.open(fp_in) as img:
scale = max(img.width / size[0], img.height / size[0])
img = img.resize((int(img.width / scale), int(img.height / scale)))
canv.paste(img, ((canv.width - img.width) // 2, (canv.height - img.height) // 2))
with open(fp_out, "wb") as fp:
Converter(canv).export_binary(fp)
def main():
parser = ArgumentParser(
description="ComputerCraft Palette Image converter",
formatter_class=RawTextHelpFormatter,
)
parser.add_argument(
"-t",
dest="textmode",
action="store_true",
help="Output a Lua script instead of binary image",
)
parser.add_argument(
"-W",
dest="width",
default=4 * 8 - 1,
type=int,
help="Width in characters",
)
parser.add_argument(
"-H",
dest="height",
default=3 * 6 - 2,
type=int,
help="Height in characters",
)
parser.add_argument(
"-p",
dest="placement",
choices=("center", "cover", "tile", "full", "extend", "fill"),
default="full",
help=dedent(
"""\
Image placement mode (same as in hsetroot)
-p center Render image centered on screen
-p cover Centered on screen, scaled to fill fully
-p tile Render image tiles
-p full Maximum aspect ratio
-p extend Same as "full" but filling borders
-p fill Stretch to fill"""
),
)
parser.add_argument("image_path")
parser.add_argument("output_path")
args = parser.parse_args()
with Image.new("RGB", (args.width * 2, args.height * 3)) as canv:
with Image.open(args.image_path).convert("RGB") as img:
if args.placement == "fill":
canv.paste(img.resize(canv.size), (0, 0))
elif args.placement in ("full", "extend", "cover"):
aspect = canv.width / img.width
if (img.height * aspect > canv.height) != (
args.placement == "cover"
):
aspect = canv.height / img.height
new_w, new_h = int(img.width * aspect), int(
img.height * aspect
)
top = int((canv.height - new_h) / 2)
left = int((canv.width - new_w) / 2)
resized_img = img.resize((new_w, new_h))
canv.paste(resized_img, (left, top))
if args.placement == "extend":
if left > 0:
right = left - 1 + new_w
w = 1
while right + w < canv.width:
canv.paste(
canv.crop(
(left + 1 - w, 0, left + 1, canv.height)
),
(left + 1 - w * 2, 0),
)
canv.paste(
canv.crop((right, 0, right + w, canv.height)),
(right + w, 0),
)
w *= 2
if top > 0:
bottom = top - 1 + new_h
h = 1
while bottom + h < canv.height:
canv.paste(
canv.crop(
(0, top + 1 - h, canv.width, top + 1)
),
(top + 1 - h * 2, 0),
)
canv.paste(
canv.crop((0, bottom, canv.width, bottom + h)),
(0, bottom + h),
)
h *= 2
elif args.placement in ("center", "tile"):
left = int((canv.width - img.width) / 2)
top = int((canv.height - img.height) / 2)
if args.placement == "tile":
while left > 0:
left -= img.width
while top > 0:
top -= img.height
x = left
while x < canv.width:
y = top
while y < canv.height:
canv.paste(img, (x, y))
y += img.height
x += img.width
else:
canv.paste(img, (left, top))
else:
pass
converter = Converter(canv)
converter._img.save("/tmp/_ccpictmp.png")
if args.textmode:
with open(args.output_path, "w") as fp:
converter.export(fp)
else:
with open(args.output_path, "wb") as fp:
converter.export_binary(fp)
if __name__ == "__main__":
main(argv[1], argv[2])
main()