fix an error in compression

hglm / detex

Low-level library for decompression and manipulation of texture blocks compressed using formats such as BC1/DXT1/S3TC, BC2-BC3, BC4/RGTC1, BC5/RGTC2, BC6 (BPTC_FLOAT), BC7 (BPTC), ETC1 and the ETC2 family, loading of KTX and DDS files, and conversion between pixel formats

ISC License

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fix an error in compression #19

Open moonfast opened 1 year ago

moonfast commented 1 year ago

we can't safely shift more than on 63 bits for uint64_t
changed an order in bitwise operations for extracting bits