A texture decompression C++-extension for Python.
pip install tex2imgor download/clone the git and use
python setup.py install- etcpack causes a segfault on linux systems, so linux systems will use basisu under the hood for etc instead
All functions accept only args and aren't able to handle kwards atm.
Decompresses data to RGBA via basisu's unpack_block function.
Args: (compressed data: bytes, width: int, height: int, format: int)
Returns: bytes
Formats:
| Format | Mode | Note |
|---|---|---|
| 0 | cETC1 | ETC1 |
| 1 | cETC1S | ETC1(subset:diff colors only, no subblocks) |
| 2 | cETC2_RGB | ETC2 color block |
| 3 | cETC2_RGBA | ETC2 alpha block followed by ETC2 color block |
| 4 | cETC2_ALPHA | ETC2 EAC alpha block |
| 5 | cBC1 | DXT1 |
| 6 | cBC3 | DXT5(DXT5A block followed by a DXT1 block) |
| 7 | cBC4 | DXT5A |
| 8 | cBC5 | 3DC / DXN(two DXT5A blocks) |
| 9 | cBC7 | |
| 10 | cASTC4x4 | |
| 11 | cPVRTC1_4_RGB | |
| 12 | cPVRTC1_4_RGBA | |
| 13 | cATC_RGB | |
| 14 | cATC_RGBA_INTERPOLATED_ALPHA | |
| 15 | cFXT1_RGB | |
| 16 | cPVRTC2_4_RGBA | |
| 17 | cETC2_R11_EAC | |
| 18 | cETC2_RG11_EAC |
Decompresses raw astc-compressed data to RGBA.
Args: (compressed data: bytes, image width: int, image height: int, block_width: int, block_height: int, isSRGB: False)
Returns: bytes
Decompresses raw atc-compressed data to RGB(A).
Args: (compressed data: bytes, width: int, height: int, alpha: bool)
Returns: bytes
alpha = False for ATC_RGB alpha = True for ATC_RGBA
Decompresses raw pvrtc-compressed data to RGBA.
Args: (compressed data: bytes, width: int, height: int, do2bit_mode: 0)
Returns: bytes
Decompresses raw etc-compressed data to RGB(A).
Args: (compressed data: bytes, width: int, height: int, format: int)
This function has a memory leak, so it might crash if you use it on too many images at once (~500+). The basisu_decompress function also supports the most common ETC formats, so it is a good alternative.
Formats:
| Format | Mode |
|---|---|
| 0 | ETC1_RGB_NO_MIPMAPS |
| 1 | ETC2PACKAGE_RGB_NO_MIPMAPS |
| 2 | ETC2PACKAGE_RGBA_NO_MIPMAPS_OLD |
| 3 | ETC2PACKAGE_RGBA_NO_MIPMAPS |
| 4 | ETC2PACKAGE_RGBA1_NO_MIPMAPS |
| 5 | ETC2PACKAGE_R_NO_MIPMAPS |
| 6 | ETC2PACKAGE_RG_NO_MIPMAPS |
| 7 | ETC2PACKAGE_R_SIGNED_NO_MIPMAPS |
| 8 | ETC2PACKAGE_RG_SIGNED_NO_MIPMAPS |
| 9 | ETC2PACKAGE_sRGB_NO_MIPMAPS |
| 10 | ETC2PACKAGE_sRGBA_NO_MIPMAPS |
| 11 | ETC2PACKAGE_sRGBA1_NO_MIPMAPS |
Retrieves texture information from the CRN file.
Args: (data: bytes)
Returns: dict
Retrieves mipmap level specific information from the CRN file.
Args: (data: bytes, mipmap_leve: int)
Returns: dict
Transcodes the specified mipmap level to a destination buffer.
Args: (data: bytes, mipmap_level: int)
Returns: bytes
The complete BinomialLLC/basis_universal is used and supported. It's default for the ATC and ASTC decompression.
The whole source of Ericsson/ETCPACK is used for the ETC decompression.
PVRTDecompress.cpp and PVRTDecompress.h of powervr-graphics/Native_SDK are used for the PVRTC decompression.
A mixed version of BinomialLLC/crunch and Unity-Technologies/crunch is used.
The Unity fork doesn't yield correct results for the original modes, so the BiomialLLC version is used for all modes besides ETC, which was created byUnity.