The test verifies that loading an icc file and serializing it
again produces exactly the same output as the input. That's not
always the case, but often. It requires the input file either
not having any padding or using null bytes as padding, it
requires the input file putting tag data in the order the
tag data is referenced in in the tag table, and it requires the
input file only using known tag types (which at the moment
means it only works for v4 profiles, but that part will change
in the future).
The new file p3-v4.icc was extracted from a jpeg taken by an
iPhone Mini.
The patch also contains modifications on several classes, functions or
files that are related to the `JPGLoader`.
Renaming include:
- JPGLoader{.h, .cpp}
- JPGImageDecoderPlugin
- JPGLoadingContext
- JPG_DEBUG
- decode_jpg
- FuzzJPGLoader.cpp
- Few string literals or texts
Instead of rehashing on collisions, we use Robin Hood hashing: a simple
linear probe where we keep track of the distance between the bucket and
its ideal position. On insertion, we allow a new bucket to "steal" the
position of "rich" buckets (those near their ideal position) and move
them further down.
On removal, we shift buckets back up into the freed slot, decrementing
their distance while doing so.
This behavior automatically optimizes the number of required probes for
any value, and removes the need for periodic rehashing (except when
expanding the capacity).
This approximation tries to generate values within 0.1% of their actual
expected value. Microbenchmarks indicate that this iterative SIMD
version can be up to 60x faster than `AK::SIMD::exp`.
This includes an Error::create overload to create an Error from a UTF-8
StringView. If creating a String from that view fails, the factory will
return an OOM InternalError instead. VM::throw_completion can also make
use of this overload via its perfect forwarding.
For example the words "can't" and "32.3" should not have boundaries
detected on the "'" and "." code points, respectively.
The String test cases fixed here are because "b'ar" is now considered
one word.
If a block jumps before performing a compare, we'd need to recursively
find the first of the jumped-to block. While this is doable, it's not
really worth spending the time as most such cases won't actually qualify
for atomic loop rewrite anyway.
Fixes an invalid rewrite when `.+` is followed by an alternation, e.g.
/.+(a|b|c)/.
Previously we were only checking for overlap when the range wasn't in
inverse mode, which made us miss things like /[^x]x/; this patch makes
it so we don't miss that.
This is done by providing Traits<ByteBuffer>::equals functions for
(Readonly)Bytes, as the base GenericTraits<T>::equals is unable to
convert the ByteBuffer to (Readonly)Bytes to then use Span::operator==
This allows us to check if a Vector<ByteBuffer> contains a
(Readonly)Bytes without having to making a copy of it into a ByteBuffer
first. The initial use of this is in LibWeb with CORS-preflight, where
we check the split contents of the Access-Control headers with
Fetch::Infrastructure::Request::method() and static StringViews
such as "*"sv.bytes().
If a box has clearance and margin bottom of preceding box is greater
than static y of the box then it should also affect y offset in current
block container so subsequent boxes will get correct y position too.
Though table wrappers are anonymous block containers (because
TableWrapper is inherited from BlockContainer) with no lines they
should not be skipped in block auto height calculation.
The AnyString concept is currently broken because it checks whether a
StringView is constructible from a type T. The StringView constructors,
however, only accept constant rvalue references - i.e. `T const&`.
This also adds a test to ensure this continues to work.
icc-v4.jpg is Meta/Websites/serenityos.org/happy/3rd/bgianf.jpg.
There are a whole bunch of jpgs with v4 color profiles and I just picked
one fairly arbitrarily. It looks like a fairly standard v4 matrix
profile that in this form is also present in many jpgs taken by mobile
phone cameras. It uses parametric curves.
icc-v2.png is based on ./Documentation/WebServer_localhost.jpg since
that is the only image in the repo with a v2 color profile. It also has
all kinds of interesting and somewhat exotic tags, such as an 'dscm' (an
Apple extension to have a description of type 'mluc', since normal
'desc' is required ot have type 'desc' in v2 files -- in v4, 'desc' has
type 'mluc') tag of type 'mluc' that actually contains data in several
languages and that exercises the non-BMP UTF-16BE decoder. It's however
still also a fairly standard v2 matrix profile, which uses 'curv'
instead of 'para' for its curves ('para' is v4-only).
I converted that jpeg file to png, and cropped most of the image
data to save on file size by running:
sips -s format png --cropToHeightWidth 21 42 in.jpg --out out.png
The current config on GitHub Actions does not use ccache, so it takes
quite a while to build. Instead, let's just run these tests on Azure
where we already build Ladybird and have ccache enabled. This also lets
us sanitize LibWeb on both Linux and macOS.
The script changes here are to A) handle differences between Azure and
GitHub Actions and B) to support running on macOS.
Rather than reading files out of /res, put them in a subfolder of
Tests/LibGfx/ and pick the path based on AK_OS_SERENITY.
That way, the tests can also pass when run under lagom.
(I just `cp`d all the files that the test previously read from
random places into Tests/LibGfx/test-inputs.)
Rather than reading files out of /res, put them in a subfolder of
Tests/LibGfx/ and pick the path based on AK_OS_SERENITY.
That way, the tests can also pass when run under lagom.
