Fixes#11705
Add bg_color and fg_color options to GhosttyRenderStateRowCellsData
that resolve the final RGB color for a cell, flattening the multiple
possible sources. For background, this handles content-tag bg_color_rgb,
content-tag bg_color_palette (looked up in the palette), and the
style bg_color. For foreground, this resolves palette indices through
the palette; bold color handling is not applied and is left to the
caller.
Both return GHOSTTY_INVALID_VALUE when no explicit color is set, in
which case the caller should fall back to whatever default color it
wants (e.g. the terminal background/foreground).
This adds HTML formatting capabilities to the formatter package. HTML is
emitted as inline styles. For palette indexes, direct RGB is emitted if
we have access to a palette; otherwise, we fall back to CSS variables.
This isn't exposed to end users yet, but will enable copy as html
features. This is available in libghostty.
Fixes#9395
**AI disclosure:** I used AI (Amp) to help me write tests, but the
implementation was done manually. I reviewed everything.
This adds a new formatter that can be used with standard Zig `{f}`
formatting that emits any portion of the terminal screen as VT
sequences. In addition to simply styling, this can emit the entire
terminal/screen state such as cursor positions, active style, terminal
modes, etc.
To do this, I've extracted all formatting to a dedicated `formatter`
package within `terminal`. This handles all formatting types (currently
plaintext and VT formatting, but can imagine things like HTML in the
future). Presently, we have "formatting" split out across a variety of
places in Terminal, Screen, PageList, and Page. I didn't remove this
code yet but I intend to unify it all on formatter in the future.
This also doesn't expose this functionality in any user-facing way yet.
This PR just adds it to the ghostty-vt Zig module and unit tests it.
Ghostty app changes will come later.
**This also improves the readonly stream** to handle OSC color
operations for _setting_ but it doesn't emit any responses of course,
since its readonly.
There are two main improvements being made here. First, we move away from using autohash and instead
use a one-shot strategy similar to the Style hashing. Since the GlyphKey includes the Metrics struct,
which contains quite a few fields, autohash was performing expensive and unnecessary repeated updates.
The second improvement is actually just, not hashing Metrics. By ignoring the Metrics field, we can
fit the rest of the GlyphKey into a 64-bit packed struct and just return that as the hash! It
ends up being unique for each GlyphKey in renderGlyph, and is nearly a zero-cost operation.
This ends up boosting the performance (on my machine at least), from around 560fps to 590fps on the
DOOM-fire benchmark.
This commit changes a LOT of areas of the code to use decl literals
instead of redundantly referring to the type.
These changes were mostly driven by some regex searches and then manual
adjustment on a case-by-case basis.
I almost certainly missed quite a few places where decl literals could
be used, but this is a good first step in converting things, and other
instances can be addressed when they're discovered.
I tested GLFW+Metal and building the framework on macOS and tested a GTK
build on Linux, so I'm 99% sure I didn't introduce any syntax errors or
other problems with this. (fingers crossed)
Back out "perf(styles): greatly improve style.hash performance"
This backs out commit 3bfe4cd25c, but
keeps the hash algorithm as XxHash3 which showed improvements in
performance.
By switching to one-shot hashing of the raw bytes of the struct with
XxHash3 instead of using `autoHash` with Wyhash, a performance gain of
around 20% can be observed in DOOM-fire-zig.
This enables these funcs to access memory offsets that may be present in
set items, which is possible since the set itself is in an offset-based
structure.
