astc-codec 1.0.2

ASTC decoder for PIL

ASTC_Codec

An ASTC decoder for PIL.

The decoder uses Google/astc-codec to decompress the data.

Installation

• Cython required

PIP

pip install astc_codec

Manual

python setup.py install

Usage

valid block_sizes

block size	footprint	footprint id
(4, 4)	k4x4	0
(5, 4)	k5x4	1
(5, 5)	k5x5	2
(6, 5)	k6x5	3
(6, 6)	k6x6	4
(8, 5)	k8x5	5
(8, 6)	k8x6	6
(10, 5)	k10x5	7
(10, 6)	k10x6	8
(8, 8)	k8x8	9
(10, 8)	k10x8	10
(10, 10)	k10x10	11
(12, 10)	k12x10	12
(12, 12)	k12x12	13

PIL.Image decoder

from PIL import Image
import astc_codec 
#needs to be imported once in the active code, so that the codec can register itself

raw_astc_image_data : bytes
block_size = (int, int) # see valid block_sizes
img = Image.frombytes('RGBA', size, raw_astc_image_data, 'astc', block_size)

raw decoder

from astc_codec import decompress_astc, ASTCDecompressToRGBA

# ASTC to RGBA
rgba_data = decompress_astc(astc_data : bytes, block_size : (int, int), width : int, height : int)

# ASTC to RGBA, direct mapping to the C++ function
# footprint = footprint id from valid block_sizes
rgba_data = ASTCDecompressToRGBA(astc_data : bytes, astc_data_size : int,
    width : int, height : int, footprint : int, out_buffer_size : int,
    out_buffer_stride : int)