Support/workaround for raw little-endian RGBA5551 images?

[applecuckoo]

Hi! I'm currently working on a decoder for a niche texture format. I'm currently using Image.frombytes and the raw decoder to convert the image, but there's only a big-endian raw_mode for RGBA5551 available. Is there a workaround for this?

For reference, I've attached a raw 256x256 file and what it should look like. Thank you!

10.zip

[radarhere]

there's only a big-endian raw_mode for RGBA5551 available

Do you mean that you are using the "RGBA;15" unpacker, but rather than RRRRRGGGGGBBBBBA, you would like an unpacker for ABBBBBGGGGGRRRRR? If you're after an immediate solution, I would suggest just reversing the information in your own code first, before passing it to Pillow.

As far as your example goes, I tried running

from PIL import Image
with open("10.dat", "rb") as fp:
    Image.frombytes("RGBA", (512, 512), fp.read(), "raw", "RGBA;15")

but received "ValueError: not enough image data", so maybe you're doing something different?

Could you provide some code to demonstrate what you're currently doing, and what you'd like to do?

[applecuckoo]

@radarhere About the error - I misremembered, it's 256x256, not 512x512. Yeah, I'll probably reverse the information then. Thank you!

[Yay295]

By the way, RGBA;15 isn't actually "RRRRRGGGGGBBBBBA", it's "ARRRRRGGGGGBBBBB". I created #8158 4.5 months ago to correct this, but it hasn't been merged yet.