PNGWriter sets up one dummy scanline with the same width as the other
scanlines in order to allow addressing the "previous scanline" without
complicating the code.
By using a FixedArray instead of a VLA, we sidestep the risk of stack
overflow and instead get something that can signal OOM.
This patch basically uses the TRY() macro throughout PNGWriter instead
of relying on the MUST()'ing wrappers in Vector and ByteBuffer.
One FIXME was killed in the making of this patch. :^)
This is a first step towards handling PNG encoding failures instead of
just falling over and crashing the program.
This initial step will cause encode() to return an error if the final
ByteBuffer copy fails to allocate. There are more potential failures
that will be surfaced by subsequent commits.
Two FIXMEs were killed in the making of this patch. :^)
`Core::Stream::File` shouldn't hold any utility methods that are
unrelated to constructing a `Core::Stream`, so let's just replace the
existing `Core::File::exists` with the nicer looking implementation.
These are an attempt to separate the internal "pixel" used by CSS from
the actual "pixel" that exists on the display. Because of things like
2x display scaling, the ratio between these can vary, so having
distinct types will help prevent errors when converting from one unit
to the other.
`CSSPixels` refers to the `px` unit used on the web, which depending on
the device may or may not map to 1 pixel on the physical display. It's
a wrapper around `float`, and will be used by LibWeb for size and
position values up until we go to paint them to the screen.
`DevicePixels` on the other hand is a 1-to-1 pixel on the physical
display. It's a wrapper around `int`.
Without this change, the upcoming LibWeb pixel types will require a
silly doubled conversion in some places.
eg: `some_rect.to_type<int>().to_type<float>()`
With these overloads, we can get away with `some_rect.to_type<int>()`.
Fonts with the encoding name "WinAnsiEncoding" should render missing
characters above character code 040 (octal) as a "bullet" character.
This patch adds Encoding::should_map_to_bullet(char_code) which is then
called by char_code_to_code_point() to check if the given char code
should be displayed as a bullet instead.
I didn't have a good way to test this, so I've only verified that it
works by manually overriding inputs to the function during the rendering
stage.
This takes care of a FIXME in the Annex D part of the PDF specification.
Strut should be taken in account while computing baseline of
a line. Otherwise it results in wrong alignment in boxes that
has inline elements without any text.
This also fixes red box in Acid 2.
Explicitly disallow constructing a CanonicalIndex from a floating point
type without going through a factory method that will throw when the
provided index cannot fit in a u32.
ErrorType::InvalidIndex does not encapsulate the reasons why an index
may be invalid. For example:
let array = new Uint8Array([1, 2, 3, 4, 5]);
array.with(10, 0);
Will currently yield:
[RangeError] Index must be a positive integer
Which is misleading because 10 *is* a positive integer.
Note that js_rope_string() has been folded into this, the old name was
misleading - it would not always create a rope string, only if both
sides are not empty strings. Use a three-argument create() overload
instead.
Three standalone Cell creation functions remain in the JS namespace:
- js_bigint()
- js_string()
- js_symbol()
All of them are leftovers from early iterations when LibJS still took
inspiration from JSC, which itself has jsString(). Nowadays, we pretty
much exclusively use static create() functions to construct types
allocated on the JS heap, and there's no reason to not do the same for
these.
Also change the return type from BigInt* to NonnullGCPtr<BigInt> while
we're here.
This is patch 1/3, replacement of js_string() and js_symbol() follow.
The sql REPL had the created/updated rows swapped by mistake. Also make
sure SQLServer fills in the correct value depending on the executed
command, and that the DELETE command indicates the rows it deleted.
We've been sending the values converted to a string, but now that the
Value type is transferrable over IPC, send the values themselves. Any
client that wants the value as a string may do so easily, whereas this
will allow less trivial clients to avoid string parsing.
Currently, when clients connect to SQL server, we inform them of any
errors opening the database via an asynchronous IPC. But we already know
about these errors before returning from the connect() IPC, so this
roundabout propagation is a bit unnecessary. Now if we fail to open the
database, we will simply not send back a valid connection ID.
Disconnect has a similar story. Rather than disconnecting and invoking
an asynchronous IPC to inform the client of the disconnect, make the
disconnect() IPC synchronous (because all it does is remove the database
from the map of open databases). Further, the only user of this command
is the SQL REPL when it wants to connect to a different database, so it
makes sense to block it. This did require moving a bit of logic around
in the REPL to accommodate this change.
In order to execute a prepared statement multiple times, and track each
execution's results, clients will need to be provided an execution ID.
This will create a monotonically increasing ID each time a prepared
statement is executed for this purpose.
When storing IDs and sending values over IPC, this changes SQLServer to:
1. Stop using -1 as a nominal "bad" ID. Store the IDs as unsigned, and
use Optional in the one place that the IPC needs to indicate an ID
was not allocated.
2. Let LibIPC encode/decode enumerations (SQLErrorCode) on our behalf.
3. Use size_t for array sizes.
This partially implements SQLite's bind-parameter expression to support
indicating placeholder values in a SQL statement. For example:
INSERT INTO table VALUES (42, ?);
In the above statement, the '?' identifier is a placeholder. This will
allow clients to compile statements a single time while running those
statements any number of times with different placeholder values.
Further, this will help mitigate SQL injection attacks.
Gfx::Color is always 4 bytes (it's just a wrapper over u32) it's less
work just to pass the color directly.
This also updates IPCCompiler to prevent from generating
Gfx::Color const &, which makes replacement easier.
This makes more sense as an Object method rather than living within the
VM class for no good reason. Most of the other 7.3.xx AOs already work
the same way.
Also add spec comments while we're here.
This is still not perfect, as we now actually crash in the
`try-finally-continue` tests, while we now succeed all
`try-catch-finally-*` tests.
Note that we do not yet go through the finally block when exiting the
unwind context through a break or continue.
We are already doing this in a good manner via the generated code,
doing so in the execution loop as well will cause us to pop contexts
multiple times, which is not very good.
Before we were doing so while exiting the catch-block, but not when
exiting the try-block.
This now centralizes the responsibility to exit the unwind context to
the finalizer, ignoring return/break/continue.
This makes it easier to handle the return case in a future commit.
This will make it easier to support both string types at the same time
while we convert code, and tracking down remaining uses.
One big exception is Value::to_string() in LibJS, where the name is
dictated by the ToString AO.
We have a new, improved string type coming up in AK (OOM aware, no null
state), and while it's going to use UTF-8, the name UTF8String is a
mouthful - so let's free up the String name by renaming the existing
class.
Making the old one have an annoying name will hopefully also help with
quick adoption :^)
Currently placing floating blocks in anonymous nodes makes
https://stackoverflow.com/ hang so let's leave it to try
to place only absolute blocks in anonymous nodes for now.
Also it breaks flex formatting when element with floating is
flex child.
This doesn't have any immediate uses, but this adapts the code a bit
more to `Core::Stream` conventions (as most functions there use
NonnullOwnPtr to handle streams) and it makes it a bit clearer that this
pointer isn't actually supposed to be null. In fact, MP3LoaderPlugin
and FlacLoaderPlugin apparently forgot to check for that completely
before starting to decode data.
This now prepares all the needed (fallible) components before actually
constructing a LoaderPlugin object, so we are no longer filling them in
at an arbitrary later point in time.
`Bytes` is very slim, so the memory and/or performance gains from
passing it by reference isn't that big, and it passing it by value is
more compatible with xvalues, which is handy for things like
`::try_create(buffer.bytes())`.
