def _png_to_nximg(data, image_format):
data_nximg = bytes()
with BytesIO(data) as io_png:
with BytesIO() as io_nximg:
png = PngImageFile(io_png)
w, h = png.width, png.height
if image_format == IMAGE_FORMAT_1555:
for y in range(h):
for x in range(w):
[r, g, b, a] = png.getpixel((x, y))
IOHelper.write_struct(io_nximg, "<2B",
*NXColor.to_1555(r, g, b, a))
elif image_format == IMAGE_FORMAT_4444:
for y in range(h):
for x in range(w):
[r, g, b, a] = png.getpixel((x, y))
IOHelper.write_struct(io_nximg, "<2B",
*NXColor.to_4444(r, g, b, a))
elif image_format == IMAGE_FORMAT_8888:
for y in range(h):
for x in range(w):
[r, g, b, a] = png.getpixel((x, y))
IOHelper.write_struct(io_nximg, "<4B", b, g, r, a)
else:
raise Exception('Unsupport image format: %s' %
image_format)
data_nximg = IOHelper.read_range(io_nximg)
return data_nximg, w, h
def ex_oxygen(img):
from PIL.PngImagePlugin import PngImageFile as Png
coreimg = Png(img)
w = coreimg.getbbox()[2]
h = coreimg.getbbox()[3] // 2
chars = [coreimg.getpixel((i, h))[0] for i in range(0, w, 7)]
message = ''.join(map(chr, chars))
result = ''.join(map(lambda x: chr(int(x)), message[43:-4].split(',')))
return 7, result
def indexes_from_image(image: PngImageFile, sprite_idx: int) -> list:
assert (0 <= sprite_idx <= 255)
sprite_x = (sprite_idx % 16) * 8
sprite_y = (sprite_idx // 16) * 8
assert (0 <= sprite_x <= (128 - 8))
assert (0 <= sprite_y <= (128 - 8))
ret = [0 for _ in range(0, 64)]
for y in range(0, 8):
for x in range(0, 8):
ret[y * 8 + x] = image.getpixel((x + sprite_x, y + sprite_y))
assert (len(ret) == 64)
return ret