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LibCompress: Add a PackBits decoder

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This compression scheme was quite popular during the 80's, and we can
still find it in use inside file formats such as TIFF or PDF.
This commit is contained in:
Lucas CHOLLET 2023-12-21 00:16:04 -05:00 • committed by Tim Schumacher
parent 5d0fb4bac3
commit d748edd994
5 changed files with 99 additions and 0 deletions
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25
Tests/LibCompress/TestPackBits.cpp Normal file
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/*
* Copyright (c) 2023, Lucas Chollet <lucas.chollet@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <LibTest/TestCase.h>
#include <AK/Array.h>
#include <LibCompress/PackBitsDecoder.h>
TEST_CASE(pack_bits)
{
Array<u8, 15> const compressed {
0xFE, 0xAA, 0x02, 0x80, 0x00, 0x2A, 0xFD, 0xAA, 0x03, 0x80, 0x00, 0x2A, 0x22, 0xF7, 0xAA
};
Array<u8, 24> const raw {
0xAA, 0xAA, 0xAA, 0x80, 0x00, 0x2A, 0xAA, 0xAA, 0xAA, 0xAA, 0x80, 0x00,
0x2A, 0x22, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA
};
auto unpacked = TRY_OR_FAIL(Compress::PackBits::decode_all(compressed));
EXPECT_EQ(unpacked.bytes(), raw);
}