To ensure actual PS2 code is not tied to the i8042 code, we make them
separated in the following ways:
- PS2KeyboardDevice and PS2MouseDevice classes are no longer inheriting
from the IRQHandler class. Instead we have specific IRQHandler derived
class for the i8042 controller implementation, which is used to ensure
that we don't end up mixing PS2 code with low-level interrupt handling
functionality. In the future this means that we could add a driver for
other PS2 controllers that might have only one interrupt handler but
multiple PS2 devices are attached, therefore, making it easier to put
the right propagation flow from the controller driver all the way to
the HID core code.
- A simple abstraction layer is added between the PS2 command set which
devices could use and the actual implementation low-level commands.
This means that the code in PS2MouseDevice and PS2KeyboardDevice
classes is no longer tied to i8042 implementation-specific commands,
so now these objects could send PS2 commands to their PS2 controller
and get a PS2Response which abstracts the given response too.
The HIDController class is removed and instead adding SerialIOController
class. The HIDController class was a mistake - there's no such thing in
real hardware as host controller only for human interface devices
(VirtIO PCI input controller being the exception here, but it could be
technically treated as serial IO controller too).
Instead, we simply add a new abstraction layer - the SerialIO "bus",
which will hold all the code that is related to serial communications
with other devices. A PS2 controller is simply a serial IO controller,
and the Intel 8042 Controller is simply a specific implementation of a
PS2 controller.
`FileSystem::absolute_path()` does `stat` the file, this commit runs
all `absolute_path` calls before touching the veil to make sure this
works as intended.
GCC's build fails in `libisl`'s configure step if `CC` is set to
Homebrew Clang with the message "Link Time Optimisation is not
supported". This is likely due to the fact that it tries to use ranlib
from Xcode, which is not compatible with the newer LLVM version's
bitcode format.
The toolchain build runs after `pick_host_compiler` is called, which
selects Homebrew Clang if the installed Xcode version is too old. We
need to unset `CC` and `CXX` for the toolchain build to sidestep the
issue.
Ideally, we would want the audio controller to run a channel at a
device's initial sample rate instead of hardcoding 44.1 KHz. However,
most audio is provided at 44.1 KHz and as long as `Audio::Resampler`
introduces significant audio artifacts, let's set a sensible sample
rate that offers a better experience for most users.
This can be removed after someone implements a higher quality
`Audio::Resampler`.
Specifying port 0 on the command line causes WebServer to select a
random available port. We now show the port WebServer is actually
using rather than assuming it is the same as the command line argument.
Adding undistributable space right before setting the content width is
incorrect when it's a percentage. Follow the specification and add it to
GRIDMIN and GRIDMAX instead.
We are currently forcing audio to play with a sample size of 16 bits. We
are also feeding the output audio device a hard-set amount of samples
without considering the actual size of its sample buffer. This would
cause a wide array of issues when playing audio elements. On my Linux
machine, we would hear some cracking; on my macOS machine, audio was
quite garbled.
We now write samples of the size requested by the output audio device.
We also limit the samples we provide to the audio device to however many
bytes are available in its buffer.
The main thread in the WebContent process is often busy with layout and
running JavaScript. This can cause audio to sound jittery and crack. To
avoid this behavior, we now drive audio on a secondary thread.
Note: Browser on Serenity uses AudioServer, the connection for which is
already handled on a secondary thread within LibAudio. So this only
applies to Lagom.
Rather than using LibThreading, our hands are tied to QThread for now.
Internally, the Qt media objects use a QTimer, which is forbidden from
running on a thread that is not a QThread (the debug console is spammed
with messages pointing this out). Ideally, in the future AudioServer
will be able to run for non-Serenity platforms, and most of this can be
aligned with the Serenity implementation.
In particular, in BFC:
- Non-floating, non-replaced elements
- Floating, non-replaced elements
- Floating, replaced elements
The first two regressed in 1d76126abe
The third one seems to have been introduced by this regression, as it
was seemingly copied from compute_width_for_floating_box in
7f9ede07bc
The fix here has two parts:
1. Don't use the fallback viewBox at all if we're not in SVG-as-image.
2. Don't make a fallback viewBox with zero width and/or height.
This fixes a crash on Bandcamp pages. Thanks Tim Flynn for reporting!
The shortcut we put in place didn't resolve percentage widths and
ignored border spacing. We can still return early after we compute the
width per the specifications.
- The check for `local()` sources wasn't working, and output `local()`
every time. Since we don't parse `local()` yet, let's just always
output a regular URL source.
- Put a space between the URL and the `format()`.
- Stop double-quoting the format string.
While CSS 2.2 does tell us to use the "auto height for BFC roots"
calculation when resolving auto heights for abspos elements, that
doesn't make sense for other formatting context roots, e.g flex.
In lieu of implementing the entire new absolute positioning model from
CSS-POSITION-3, this patch borrows one small nugget from it: using
fit-content height as the auto height for non-BFC-root abspos elements.
This just works at the moment after e19892a099, but if we ever do
the FIXME in ColorIndexingTransform::transform(), this test will
remind us to think of this case there too.
catdog-alert-13-alpha-used-false.webp is identical to
catdog-alert-13.web but with the byte at offset 0x2a changed from
0x10 to 0x00 -- that is, the bit in the VP8L header that stores
`is_alpha_used` is cleared.
See the commit message of e19892a099 for more information.
When embedding an SVG in an img element, if the external SVG's root
element has both width and height attributes, but no viewBox attribute,
we now create a fallback viewBox with "0 0 width height".
This appears to match the behavior of other browsers. Inspired by
discussion on Mozilla's bug tracker:
https://bugzilla.mozilla.org/show_bug.cgi?id=614649
If we don't paint, SVG-as-image documents don't get laid out, and so
have 0x0 size throughout.
This change is also generally nice, as it makes the painting code run
on all the layout tests, increasing coverage. :^)
Compute the contributions to a spanning cell width from each cell in the
span. This better handles uneven column widths, since each cell
contribution is proportional with its own width as opposed to the own
width of the first cell in the span.
This better matches the behavior of other browsers and further aligns
with the specification.
Always use `would_be_fully_clipped_by_painter` to check if painting can
be skipped.
This allows to quickly find all the places where this check happens and
also removes incosistency that before we checked for intersection with
viewport rect in some places and for intersection with painter clip
rect in other places.
All code that is related to PC BIOS should not be in the Kernel/Firmware
directory as this directory is for abstracted and platform-agnostic code
like ACPI (and device tree parsing in the future).
This fixes a problem with the aarch64 architecure, as these machines
don't have any PC-BIOS in them so actually trying to access these memory
locations (EBDA, BIOS ROM) does not make any sense, as they're specific
to x86 machines only.
This code is very x86-specific, because Intel introduced the actual
MultiProcessor specification back in 1993, qouted here as a proof:
"The MP specification covers PC/AT-compatible MP platform designs based
on Intel processor architectures and Advanced Programmable Interrupt
Controller (APIC) architectures"
Most of the ACPI static parsing methods (methods that can be called
without initializing a full AML parser) are not tied to any specific
platform or CPU architecture.
The only method that is platform-specific is the one that finds the RSDP
structure. Thus, each CPU architecture/platform needs to implement it.
This means that now aarch64 can implement its own method to find the
ACPI RSDP structure, which would be hooked into the rest of the ACPI
code elegantly, but for now I just added a FIXME and that method returns
empty value of Optional<PhysicalAddress>.
