Linear gradient painting is implemented in the following way:
1. The rectangle is divided into segments where each segment represents
a simple linear gradient between an adjacent pair of stops.
2. Each quad is filled separately using a fragment shader that
interpolates between two colors.
For now `angle` and `repeat_length` parameters are ignored.
With these changes it is now possible to create OpenGL context on macOS
and run GPU-painter. For now only QT client has a CLI param that turns
it on though.
When deciding whether we need to create a full-blown `arguments` object,
we look at various things, starting as early as in the parser.
Until now, if the parser saw the identifier `arguments`, we'd decide
that it's enough of a clue that we should create the `arguments` object
since somebody is obviously accessing it.
However, that missed the case where someone is just accessing a property
named `arguments` on some object. In such cases (`o.arguments`), we now
hold off on creating an `arguments` object.
~11% speed-up on Octane/typescript.js :^)
When a box does not have a top, left, bottom, or right, there is no
need to adjust the offset for positioning relative to the padding edge,
because the box remains in the normal flow.
This is a bit spammy now that we are performing some overload resolution
at build time. The fallback to an interface has generally worked fine on
the types it warns about (BufferSource, Module, etc.) so let's not warn
about it for every build.
The condition for checking if a script has a JS MIME type is currently
flipped. Extract the check to a local to make it a bit easier to reason
about at quick glance.
We now create a WorkerAgent for the parent context, which is currently
only a Window. Note that Workers can have Workers per the spec.
The WorkerAgent spawns a WebWorker process to hold the actual
script execution of the Worker. This is modeled with the
DedicatedWorkerHost object in the WebWorker process.
A start_dedicated_worker IPC method in the WebWorker IPC creates the
WorkerHost object. Future different worker types may use different IPC
messages to create their WorkerHost instance.
This implementation cannot yet postMessage between the parent and the
child processes.
Co-Authored-By: Andreas Kling <kling@serenityos.org>
This is a hack on top of a hack because Workers don't *really* need to
have a Web::Page at all, but the ResourceLoader infra that should be
going away soon ™️ is not quite ready to axe that requirement for
cookies.
We don't have a 'root execution environment' anymore (thankfully), so
we can make sure that the ESO the HostDefined object holds onto is a
NonnullGCPtr.
By using available_inner_space_or_constraints_from(available_space), we
ensure that the available space used to calculate the min/max content
height is constrained by the width specified for the box itself
(I know that at least GFC always expects available width to be
constrained by specified width if there is any).
This change improves layout in "Recent news" block on
https://telegram.org/
These two static members are now used to implement respective `matches_`
methods but will also be useful to provide a global implementation of
the specified concept of whitespace.
This commit correctly validates the `type` and `subtype` arguments,
instead of checking for http quoted code points, by following how
the spec's MIME type parsing algorithm would validate a MIME type's
type and subtype.
It also uses the move-assigned member variables instead of the
arguments within the constructor body (as using the arguments at
this point will lead to undesired behavior).
The elements this hack was being used for were grouping elements, and
can be properly sized: https://svgwg.org/svg2-draft/struct.html#Groups.
Note: Other than one test change the elements here are already covered
by layout tests.
Previously, the DNS packet parser would happily parse a DNS packet
containing an arbitrarily large domain name. We now limit each segment
of a domain name to 63 characters and the total domain name length to
253 characters. This is consistent with RFC1035, which specifies that
the maximum name length is 255 octets. This includes the initial length
byte and final null byte, which accounts for the 2 byte difference.
Previously, a DNS packet containing an invalid name would be returned
with an empty name. With this change, an error is returned if any error
is encountered during parsing.
TJ acts on a list of either strings or numbers.
The strings are drawn, and the numbers are treated as offsets.
Previously, we'd only apply the last-seen number as offset when
we saw a string. That had the effect of us ignoring all but the
last number in front of a string, and ignoring numbers at the
end of the list.
Now, we apply all numbers as offsets.
Our rendering of Tests/LibPDF/text.pdf now matches other PDF viewers.
Per 5177.Type2.pdf 3.1 "Type 2 Charstring Organization",
a glyph's charstring looks like:
w? {hs* vs* cm* hm* mt subpath}? {mt subpath}* endchar
The `w?` is the width of the glyph, but it's optional. So all
possible commands after it (hstem* vstem* cntrmask hintmask
moveto endchar) check if there's an extra number at the start
and interpret it as a width, for the very first command we read.
This was done by having an `is_first_command` local bool that
got set to false after the first command. That didn't work with
subrs: If the first command was a call to a subr that just pushed
a bunch of numbers, then the second command after it is the actual
first command.
Instead, move that bool into the state. Set it to false the
first time we try to read a width, since that means we just read
a command that could've been prefixed by a width.
Previously, certain crafted input could cause the JS parser to hang, as
it repeatedly tried to parse an EOF token after hitting an "invalid
destructuring assignment target" error. This change ensures that we
stop parsing after hitting this error condition.
Images can have multiple filters, each one of them is processed
sequentially. Only the last one will be relevant for the image format
(DCT or JPXDecode), so use the last filter instead of the first one to
detect that property.
For valid PDFs, this makes no difference.
For invalid PDFs, we now assert during the cast in resolve_to() instead
of returning a PDFError. However, most PDFs are valid, and even for
invalid PDFs, we'd previously keep the old color space around when
getting the PDF error and then usually assert later when the old
color space got passed a color with an unexpected number of components
(since the components were for the new color space).
Doesn't affect any of the > 2000 PDFs I use for testing locally,
is less code, and should make for less surprising asserts when it
does happen.
Namely, for CalGrayColorSpace, CalRGBColorSpace, LabColorSpace.
Fixes a crash rendering any page of Adobe's 5014.CIDFont_Spec.pdf
(which uses CalRGBColorSpace with an indirect dict: The dict is
object `92 0`, and many color spaces are inline objects referring
to it).
Since we already call `Painter::flush()` in `PageHost::paint()` we do
not need to do that again in `PaintingCommandExecutorGPU` destructor.
This makes GPU painting run noticeably faster because `flush()` does
expensive `glReadPixels()` call.
Array.length is magical (since it has to reflect the number of elements
in the object's property storage).
We now handle it specially in jitted code, giving us a massive speed-up
on Kraken/ai-astar.js (and probably many other things as well) :^)
