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LibGfx: Fix IHDR filter method field validation

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As per the PNG specification: "Filter method is a single-byte
integer that indicates the preprocessing method applied to the
image data before compression. At present, only filter method 0
(adaptive filtering with five basic filter types) is defined."
This commit is contained in:
Idan Horowitz 2021-04-07 17:23:36 +03:00 • committed by Andreas Kling
parent f0bd17e610
commit 8a0f1d87c0
1 changed files with 1 additions and 1 deletions
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Userland/Libraries/LibGfx/PNGLoader.cpp
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@ -829,7 +829,7 @@ static bool is_valid_compression_method(u8 compression_method)
static bool is_valid_filter_method(u8 filter_method) static bool is_valid_filter_method(u8 filter_method)
{ {
return filter_method <= 4; return filter_method == 0;
} }
static bool process_IHDR(ReadonlyBytes data, PNGLoadingContext& context) static bool process_IHDR(ReadonlyBytes data, PNGLoadingContext& context)