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LibGfx/WebPWriter: Do not convert -inf to unsigned
Else UBSan complains about the color indexing test in this PR.
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sideshowbarker
2024-07-17 04:32:07 +09:00
Author: https://github.com/nico Commit: https://github.com/SerenityOS/serenity/commit/47d3245ea7 Pull-request: https://github.com/SerenityOS/serenity/pull/24483 Reviewed-by: https://github.com/gmta ✅
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@ -206,7 +206,7 @@ static ErrorOr<CanonicalCode> write_normal_code_lengths(LittleEndianOutputBitStr
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// "int length_nbits = 2 + 2 * ReadBits(3);
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// int max_symbol = 2 + ReadBits(length_nbits);"
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// => length_nbits is at most 2 + 2*7 == 16
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unsigned needed_length_nbits = floor(log2(encoded_lengths_count - 2) + 1);
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unsigned needed_length_nbits = encoded_lengths_count > 2 ? floor(log2(encoded_lengths_count - 2) + 1) : 2;
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VERIFY(needed_length_nbits <= 16);
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needed_length_nbits = ceil_div(needed_length_nbits, 2) * 2;
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TRY(bit_stream.write_bits((needed_length_nbits - 2) / 2, 3u));
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