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LibGfx: Use zlib instead of just deflate when loading PNGs

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PNGs use deflate with zlib, however we were just skipping the zlib
bytes and then piping it into deflate decompressor. Since we have a
zlib decompressor, lets use that instead.

This has the added benefit of extra error checking.
This commit is contained in:
Luke 2021-03-28 15:33:37 +01:00 • committed by Andreas Kling
parent 8c99968ec1
commit c3d4fbb2a5
1 changed files with 2 additions and 2 deletions
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4
Userland/Libraries/LibGfx/PNGLoader.cpp
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@ -28,7 +28,7 @@
#include <AK/Endian.h>
#include <AK/LexicalPath.h>
#include <AK/MappedFile.h>
#include <LibCompress/Gzip.h>
#include <LibCompress/Zlib.h>
#include <LibGfx/PNGLoader.h>
#include <fcntl.h>
#include <math.h>
@ -777,7 +777,7 @@ static bool decode_png_bitmap(PNGLoadingContext& context)
if (context.color_type == 3 && context.palette_data.is_empty())
return false; // Didn't see a PLTE chunk for a palettized image, or it was empty.
auto result = Compress::DeflateDecompressor::decompress_all(context.compressed_data.span().slice(2));
auto result = Compress::Zlib::decompress_all(context.compressed_data.span());
if (!result.has_value()) {
context.state = PNGLoadingContext::State::Error;
return false;