Changelog

0.4.10​

• New SelectAll action: selects the entire terminal content, including the scrollback history, so it can be copied. Bound to Command + A on macOS by default, and available on every platform for custom key bindings via action = "SelectAll".
• Fixed hint label rendering: keyboard hint labels (hyperlink hints) are now drawn as proper grid overlays using the configured hint foreground/background colors, with the leading character of each label highlighted.
• Tab strip refresh: tab island backgrounds are now derived automatically from the window background color. colors.tabs and colors.tabs-active now set the inactive and active tab title colors, and the bar, tab-border, tabs-foreground, tabs-active-foreground and tabs-active-highlight color options were removed.

0.4.9​

• Updated wgpu to 30.0.0 and the librashader filter chain to 0.12 (the wgpu path used for RetroArch shaders on Windows/WASM and behind the wgpu feature flag elsewhere). librashader 0.12 brings a smarter framebuffer pool that only allocates intermediate framebuffers for the shader passes that actually need them.

0.4.8​

• Adaptive theme on Linux: Rio now follows the system light/dark preference on Wayland and X11. With adaptive-theme configured, Rio watches the XDG Desktop Portal color-scheme setting (the same one Firefox and GNOME/KDE use) and switches between your light and dark themes live when the system appearance changes, no restart required. This previously worked only on macOS and Windows (#408; based on #1358 by @pinpox).

0.4.7​

• Tabs can now be reordered by dragging them along the tab strip. Displaced tabs slide into place with a spring animation, and a released tab settles into its new slot.
• Font fallback discovery now works on Linux and Windows: glyphs missing from your primary font — Nerd Font icons, CJK, emoji, and box/symbol characters — are discovered from installed system fonts (fontconfig on Linux, font-kit on Windows) and registered on the fly, instead of rendering as tofu (missing-glyph boxes). Previously only macOS did this. (#1630 by @nikicat, #1642 by @pinpox; closes #1015).
• A tab's custom background color now follows the tab when tabs are reordered or closed, instead of staying pinned to a slot and painting under the wrong tab. The color picker also closes when its tab is closed.
• New tabs show ~ as a placeholder title until the running program sets one.
• The smooth (trail) cursor no longer animates between tabs and panels — switching tab or split places the cursor directly instead of sliding a trail across the screen.

0.4.6​

• Box-drawing and related symbols render again. Box-drawing, block elements, braille, powerline separators, geometric shapes, and legacy computing symbols are now drawn as crisp, pixel-aligned atlas sprites that tile seamlessly at any font size and scale factor — they no longer fall back to the font's (often gappy) glyphs. These had been dropped during the v0.4.x grid rewrite.
• Kitty graphics: the X=/Y= sub-cell pixel offset is now applied when placing images (#1645 by @floens) — the parser already understood it, but placements were pinned to the cell boundary. Offsets are clamped to the cell box per the kitty spec, and an offset that spills the image into an extra row/column is now accounted for in cursor movement and row occupation.
• Updated wgpu to 29.0.3 and the librashader filter chain to 0.11 (the wgpu path used for RetroArch shaders on Windows/WASM and behind the wgpu feature flag elsewhere).

0.4.5​

• Tab color picker now also opens on right-click (previously Control + left-click only).
• New reset swatch in the tab color picker: a slashed box at the end of the swatch row clears the tab's custom color back to the default.
• Fix clicks and cursor overrides being intercepted over the empty band at the top of the window when navigation.hide-if-single hides the tab strip on a single tab. New shared Navigation::island_visible(num_tabs) predicate keeps the renderer, click router, and cursor handler aligned — the empty band now passes through to the grid for selection and double-click maximize.

0.4.4​

• fix characters disappearing while typing on macOS — e.g. "agg" rendering as "ag", "355" as "35" (#1595). The text-run iterator now breaks the run around the cursor cell so speculative substitutions on later cells can't blank earlier ones.
• fix panic on window resize / maximize (#1593, #1596 by @kronberger-droid). Grid dimensions are now sourced from the same snapshot that sized the row buffers, not from a live value that could race ahead.
• macOS: text selection at the top of the window now works when navigation.hide-if-single is on with a single tab (#1512, #1516 by @0x0aa). Click routing and the cursor override now share a single gate that matches what the renderer paints.
• reduce per-frame allocations in the rioterm renderer: per-cell styles are materialized once per snapshot, per-row dirty bits skip unchanged rows on partial damage, and visible-cell extras live in a per-frame map.
• text-run shape cache key is now position-independent, and runs no longer break on space — adjacent words shape in a single call and cache hits stay high as the cursor walks a row.

0.4.3​

• fix wrong font size and window chrome alignment after connecting/disconnecting an external monitor (#1588 by @tauil).
• drop the copa and rio-proc-macros crates — the escape-sequence parser now lives in rio-backend with hot-path optimizations (bulk ASCII dispatch, inline OSC buffer, flat codepoint-width table, fused validate+decode).
• adopt simdutf for SIMD UTF-8 transcoding, validation, and base64 decoding.

0.4.2​

• macOS Metal: window transparency now actually renders. The CAMetalLayer is flipped to non-opaque whenever window.opacity < 1 or a blur style is set, so the alpha in the drawable's pixels reaches the compositor. Default windows stay opaque so the macOS opaque-window fast path is preserved.
• Per-cell background alpha: cells that don't paint an explicit background color now write alpha = 0 instead of stamping the default theme background at full alpha. The drawable's translucent clear shows through, which is what makes the window actually look transparent (not just the margins). Cells with an SGR-set background, selection / search highlights, and inverse-video cells stay fully opaque.
• New window.opacity-cells config option. Off by default — cells with an SGR-set background stay fully opaque so syntax-highlighted regions and TUI panels (Neovim, tmux, lazygit) keep their contrast. Set to true to apply the opacity multiplier to those cells too, so the entire terminal — including TUI surfaces — shares the configured translucency.
• window.blur now accepts the macOS liquid-glass styles in addition to the existing bool. New string values: "macos-glass-regular" (regular opacity) and "macos-glass-clear" (highly transparent), both available on macOS 26 (Tahoe) and later. Older macOS / other platforms fall back to the standard system blur and emit a warning instead of failing. Existing blur = true / blur = false configs are unchanged.

0.4.1​

• small updates on goreleaser build config for perf optimizations.

0.4.0​

Note: There's a decent chance v0.4.0 may not work for many users. I've done my best to test it on my very old Windows and Linux machines, but it's difficult to cover all cases. This version includes many rewrites, so I recommend checking that it works properly before updating.

• reduced app size (dmg for example went from 16mb to 7.11mb).
• macos core text for searching and shaping.
• yeslogic-fontconfig-sys and windows core apis for searching. swash keeps for shaping.
• removed the extra ir for rendering so no more textruns, less memory and faster operations
• vulkan native support.
• no more font extras, rio will always find the glyph if the font is installed.
• wgpu now is optional via feature flag, this feature flag is required if you use rio with retro arch shaders. This is a movement to make rio possible for official debian.
• rio now only renders on Screen::render to ensure GPU is not stuck or overloaded during high render peaks.
• renderer.backend is only three options: wgpu, metal and vulkan.

tested with 7e222ef2f1bc0a9eb4ff7f111b8f4c94faa9be97

0.3.11​

• Windows: native MessageBoxW close-confirmation dialog when confirm-before-quit = true (default), mirroring macOS's applicationShouldTerminate NSAlert in rio-window/src/platform_impl/macos/app_delegate.rs. Replaces rio's in-window GPU-rendered confirmation modal on Windows. New EventLoopRunner.confirm_before_quit: Cell<bool> set via the same public EventLoop::set_confirm_before_quit that macOS already uses (cfg gate widened to any(target_os = "macos", target_os = "windows")). The WM_CLOSE handler in event_loop.rs checks the flag and vsync_state.window_count() <= 1 (only the last window prompts — matches macOS's app-wide quit semantics) and on confirm-No swallows the message so the window stays open. rioterm's WindowEvent::CloseRequested handler now follows the same fast path on Windows as on macOS — routes.remove(&window_id) + maybe-exit() — since the user already confirmed at the OS layer.
• Windows render loop now matches the macOS / CVDisplayLink model exactly: Window::request_redraw sets a per-window Arc<AtomicBool> dirty flag instead of immediately calling RedrawWindow(RDW_INTERNALPAINT). The DwmFlush worker thread (rio-window/src/platform_impl/windows/event_loop/vsync.rs) is the single source of frame timing — per composition cycle it iterates the window registry and, for each window where dirty || should_present_after_input (1 s post-input window, identical to macOS), calls RedrawWindow(.., RDW_INVALIDATE). Existing WM_PAINT → RedrawRequested path is unchanged. Plumbing: new vsync::VSyncSharedState (Arc<RwLock<HashMap<HWND, Arc<AtomicBool>>>> registry + Mutex<Instant> for last input) lives on ActiveEventLoop, threaded into WindowData and the Window struct so input handlers, request_redraw, and the worker all share it. Window::Drop unregisters before DESTROY_MSG_ID. Replaces the earlier "always invalidate per vsync" zed mirror — that approach worked but didn't compose with the app's own request_redraw, which made scroll feel locked to DWM tick. Now scroll-driven renders queue immediately into the next vsync (≤16 ms wait) and idle frames are skipped entirely. Net behaviour matches macOS one-to-one.
• Windows: window.blur = true now actually blurs (was a no-op stub). Implementation calls DwmSetWindowAttribute with DWMWA_SYSTEMBACKDROP_TYPE = DWMSBT_TRANSIENTWINDOW (Acrylic) when blur is on, DWMSBT_NONE when off — uses the existing set_system_backdrop plumbing in rio-window/src/platform_impl/windows/window.rs. Wired both at window creation (via attributes.blur in on_create) and at runtime via the cross-platform Window::set_blur. Requires Windows 11 22H2+; older builds silently no-op (matches the previous behaviour).
• Windows: vsync-driven render loop with 1-second post-input sustain (matches macOS / Linux / zed behaviour). All inside rio-window — frontends still just respond to RedrawRequested. New worker thread (platform_impl/windows/event_loop/vsync.rs) calls DwmFlush() per composition cycle; when DWM is disabled, the monitor is asleep, or the call returns under the 1 ms threshold (RDP / occluded), it falls back to thread::sleep at the queried DwmGetCompositionTimingInfo.qpcRefreshPeriod interval, with a rateRefresh numerator/denominator fallback for spuriously low values and a 16.6 ms (60 Hz) default if both queries fail. Same heuristic zed uses in gpui_windows/src/vsync.rs. Each tick PostMessageW's a registered custom message (Winit::VsyncTick) to the existing thread_msg_target; the handler in thread_event_target_callback enumerates thread windows via EnumThreadWindows, filters with IsWindowVisible, and posts RedrawWindow(hwnd, RDW_INTERNALPAINT) per visible window so the existing WM_PAINT path emits RedrawRequested unchanged. The fan-out is gated on a new EventLoopRunner.should_present_after_input() (1 s window after the last input event) — same field/method names as the macOS / Wayland / X11 implementations. mark_input_received is hooked into public_window_callback_inner for WM_KEY{DOWN,UP}, WM_SYSKEY{DOWN,UP}, WM_MOUSE{MOVE,WHEEL,HWHEEL}, all four button down/up pairs, WM_TOUCH, and WM_POINTER{DOWN,UPDATE,UP}. EventLoop::drop now joins the worker thread (via a stub()-and-mem::replace swap) before destroying thread_msg_target so the worker can never PostMessageW to a freed HWND. New windows-sys feature Win32_System_Performance for QueryPerformanceFrequency. build.rs no longer panics when cross-compiling between host and target OS (#[cfg(target_os = ...)] branches now also check CARGO_CFG_TARGET_OS), so cargo check --target x86_64-pc-windows-gnu actually works from a macOS workstation.
• Linux: vsync-driven render loop with 1-second post-input sustain (matches macOS / zed behaviour). Two changes inside rio-window (no rioterm churn — frontends still just respond to RedrawRequested). Wayland (platform_impl/linux/wayland/event_loop/mod.rs): the wl_callback::Done handler now unconditionally re-arms the next wl_surface.frame() and drives an auto-loop, modelled on zed's gpui_linux/src/linux/wayland/window.rs:572-587. Compositors stop delivering Done for occluded windows so the loop pauses naturally without an explicit visibility check. X11 (platform_impl/linux/x11/mod.rs): a new calloop::timer::Timer source reschedules at the primary monitor's xrandr-derived refresh rate (monitor::mode_refresh_rate_millihertz, fallback 60 Hz); each tick sets EventLoopState.vsync_pending and the main pump fans the flag out to every visible window via the existing redraw_sender channel. Mirrors zed's gpui_linux/src/linux/x11/client.rs:1934-1971. Both paths gate the synthetic RedrawRequested on a new should_present_after_input() (1 s window after the last input event) — same field/method names as the existing macOS implementation in platform_impl/macos/window_delegate.rs:139,997. mark_input_received is hooked into the Wayland KeyboardHandler and PointerHandler and into the X11 KeyPress/KeyRelease + XInput2 ButtonPress/Release/Motion dispatch sites in event_processor.rs. Net effect: ProMotion / 144 Hz / 240 Hz monitors now stay at peak refresh during typing/scroll on Wayland and X11; idle terminals don't burn extra CPU because the gate falls back to the existing dirty-driven path outside the 1 s window.
• Full kitty graphics protocol Unicode-placeholder support (kitten icat --unicode-placeholder and any tmux/yazi/etc. that uses U+10EEEE placement cells). Wire-protocol bugs fixed: (1) the APC parser stored U=1 into a private cmd.virtual_placement field that was never propagated to PlacementRequest, so place_graphic always fell through to the direct-overlay branch; (2) place_virtual_graphic was auto-writing U+10EEEE cells to the grid, racing kitty's own writes (per the spec the application emits the cells, the terminal only stores metadata); (3) icat uses a=T,U=1 (combined transmit-and-display) which goes through kitty_transmit_and_display, not place_graphic — that handler now also routes virtual placements correctly and pushes pixel data to pending_images (the regular overlay path did this implicitly via place_kitty_overlay); (4) the diacritics table had 299 entries instead of the canonical 297 (two stray entries \u{06EA} and \u{06ED} from earlier work), shifting every index past the divergence point so image_id_high decoded as the wrong byte (e.g. 0x5C stored, 0x5E decoded). Replaced with the 297 entries from kitty/gen/rowcolumn-diacritics.txt. Shader bug fixed: image.metal interpreted source_rect.zw as size but the new code passes it as end-coords; switched to mix(.xy, .zw, corner) (only worked before because every overlay used the full-image default [0,0,1,1]). Renderer side, modeled cell-by-cell on ghostty's graphics_unicode.zig: new Row.kitty_virtual_placeholder per-row dirty flag set in Crosswords::input and checked by the scan loop, so we only walk rows that contain a placeholder (page.zig:1953-1958); new IncompletePlacement + can_append / append / complete implements kitty's diacritic continuation rules — a cell with missing row/col/high-byte diacritics inherits from the previous cell on the row and the col field can be omitted to mean "auto-increment from prev" (graphics_unicode.zig:407-535); the renderer now walks each visible row left-to-right, builds runs of consecutive cells that belong to the same (image_id, placement_id, image_row) with sequential image columns, and pushes ONE GraphicOverlay per run instead of one per placement (matches ghostty's PlacementIterator); per-run aspect-preserving fit, centering, and source-rect clipping factored into kitty_virtual::compute_run_geometry — handles partial visibility (placement scrolled half off-screen renders only the visible image slice), runs that fall entirely in the centering padding (returns None), and runs that straddle the padding boundary (clips both the screen rect and the source rect so the rendered slice exactly covers the fitted-image area). Placeholder cells render with style.background_color = None so the per-cell bg quad doesn't cover the BelowText image. GraphicOverlay gained a source_rect: [f32; 4] field (default [0,0,1,1] via FULL_SOURCE_RECT) wired through to the existing ImageInstance.source_rect. Tests cover: the 297-entry diacritic table, IncompletePlacement::from_cell across all input shapes (Indexed fg, Spec fg + 3rd diacritic, underline=placement_id, missing diacritics, Named fg → 0), all can_append cases (row inherit, col inherit, sequential col, col jump, row mismatch, image-id mismatch, image-id-high inherit), a 3-cell run with only the first cell carrying diacritics, parser-level U=1 propagation, the metadata-only contract of place_virtual_graphic, an end-to-end pass that feeds icat's exact wire format and asserts both the resulting grid cells AND the per-row dirty flag, and compute_run_geometry across exact-fit / image-taller-than-grid (horizontal centering + left-padding cull) / image-wider-than-grid (vertical centering + top-row cull) / partial-visibility-scrolled-off-top / origin-offset / zero-sized-image cases.
• macOS Metal renderer: triple-buffered pipeline modeled on zed's gpui_macos::InstanceBufferPool. CAMetalLayer.maximumDrawableCount is now 3 (was 2). The six per-frame buffers (text vertices, quad instances, kitty/sixel image instances, bg-image instance, bg-fill instance, Globals uniform) collapsed into a single pooled metal::Buffer per frame: text/quad/image data bump-allocates from the pool buffer with 256-byte aligned offsets, and Globals (transform + input_colorspace, ~80 B) goes through set_vertex_bytes / set_fragment_bytes so no buffer is needed for it at all. The pool starts at 2 MiB, doubles on overflow up to a 256 MiB cap (matches zed). On overflow we end-encoding, drop the never-committed command buffer, grow the pool, and retry the frame from scratch — old smaller buffers in flight get rejected by release after grow and dropped naturally, no "all 3 slots must grow together" coordination. command_buffer.add_completed_handler releases the buffer back to the Arc<Mutex<InstanceBufferPool>> on the GPU completion thread. Net effect: CPU can stay up to 3 frames ahead of the GPU without racing the previously single StorageModeShared buffers (the old code was relying on luck — every frame shared one allocation), and ProMotion 120 Hz is now reachable without dropped frames during heavy scenes. MetalRenderer::resize is gone (no more uniform buffer to refresh on resize); Renderer::render_metal now owns command-buffer / encoder / drawable / commit, so Sugarloaf::render_metal is just a one-liner that hands bg_color and the MetalContext over.
• Fix Nerd Font glyphs from an extras family (e.g. extras = [{family="JetBrainsMono Nerd Font Mono"}]) overflowing into the next grid cell. FontLibraryData::load was loading every extras/symbol-map font with is_emoji = true, which made font_cache::resolve_with clamp every glyph from that font to width = 2.0; the terminal grid still budgeted one cell per PUA codepoint, so the layout advanced 2× per glyph and the next character painted on top of the right half. Extras and symbol-map fonts now load with is_emoji = false, and FontData::from_data / from_slice auto-promote to is_emoji = true when the SFNT carries a color table (COLR, CBDT, CBLC, or sbix) — mirroring ghostty's FT_HAS_COLOR() / CoreText SBIX check, so a real emoji font in extras still gets the wide-cell / color-atlas treatment without needing a config flag.
• Removed the dedicated fonts.emoji config slot. Rio now relies entirely on fonts.extras plus the color-table auto-detection above: drop extras = [{family="Apple Color Emoji"}] (or any color family) and it's picked up as emoji; otherwise the bundled Twemoji continues to serve as the default color-emoji fallback. User [fonts.emoji] sections in existing configs are silently ignored instead of erroring.
• PUA / Nerd Font glyphs with an adjacent blank cell now fill the full 2-cell constraint crisply instead of rendering half-sized or blurry. pua_constraint_width in the rioterm renderer still picks 1 or 2 cells based on neighbour content; the compositor's fit pass (sugarloaf/src/renderer/compositor.rs) dropped the .min(1.0) cap so the glyph can scale up to the 2-cell slot — and to avoid stretching a bitmap atlas entry (which is blurry), GlyphCacheSession::get_at_size(id, size) now rasterizes the glyph fresh at font_size × cells when cells > 1. Cache key (id, size) already disambiguates the two rasterizations, so 1-cell and 2-cell lookups for the same codepoint coexist. Fixes JetBrainsMono NF Mono (patched to ~1-cell advance) showing as half-sized inside a 2-cell slot next to Cascadia NF whose glyphs render ~2 cells wide natively.
• Fix vertical positioning of constraint-fit PUA glyphs. The compositor was placing the scaled glyph at baseline − entry.top × scale, which drifts upward as the scale grows because the top-bearing scales faster than the descent-bearing. Switched to cell-centered placement (topline + (line_height − sh) / 2.0), matching ghostty's .align_vertical = .center1 choice for isSymbol(cp) — symbols aren't baseline-anchored the way text characters are.
• macOS Metal renderer: wide-gamut pipeline with ghostty-compatible native alpha blending. CAMetalLayer uses plain BGRA8Unorm tagged with kCGColorSpaceDisplayP3 (earlier iterations used BGRA8Unorm_sRGB, which makes Metal do linear-light blending — physically correct but visibly brighter on AA edges and translucent overlays than ghostty's and Terminal.app's default). The three pipeline color attachments moved back to BGRA8Unorm to match. Fragment shaders (renderer.metal, image.metal) now srgb_to_linear → sRGB-to-P3 matrix → linear_to_srgb before returning, emitting gamma-encoded DisplayP3 bytes that the drawable stores verbatim and the compositor displays directly. MTLClearColor goes through the same encode on the Rust side (sugarloaf::prepare_output_rgb_f64) so the first cleared pixel matches a shader-drawn quad of the same theme colour. Net effect: same saturation as before (P3 gamut preserved), same glyph weight as ghostty alpha-blending = native / Terminal.app (no more AA-edge brightening). The metal crate doesn't wrap CAMetalLayer.colorspace yet, so the setter goes through msg_send!; the CGColorSpace handle is mem::forget-ed to guarantee the pointer stays live for the layer's lifetime, and a post-set read-back logs a warning if the colorspace didn't take.
• Breaking (macOS): [window] colorspace default flipped from display-p3 to srgb. The semantics also changed to match ghostty's window-colorspace: the setting now describes how Rio interprets input color bytes (hex values in config, ANSI direct-color sequences), not which colorspace the Metal surface uses. The Metal surface is always DisplayP3 regardless of this setting. With srgb (the new default), Rio applies a Bradford-adapted sRGB D65 → DisplayP3 D65 matrix (in linear light, after srgb_to_linear) so #ff0000 renders as sRGB-standard red — matching ghostty and every other app. Users who preferred the previous more-saturated P3-interpreted look can pin it with colorspace = "display-p3". The matrix runs in the fragment shader (prepare_output_rgb in renderer.metal / image.metal) driven by a new input_colorspace: u8 field on the Globals uniform, and at the Rust boundary for the MTLClearColor (sugarloaf::prepare_output_rgb_f64) so the first HW-cleared pixel lands in the same colorspace as shader-emitted pixels. MetalRenderer::new takes the colorspace at construction and writes it into every uniform upload; the Metal encoder now binds the uniform buffer to fragment slot 1 (in addition to the existing vertex slot 1) so fs_main / image_fs_main can read the flag.
• New OpenCommandPalette key-binding action (default Cmd+Shift+P on macOS, Ctrl+Shift+P elsewhere), user-remappable via opencommandpalette in [bindings]. Replaces the hardcoded Cmd/Ctrl+Shift+P branch that used to sit in screen::process_key_event ahead of the binding system, so the palette shortcut now composes with mode-gating like every other action.
• New List Fonts command palette entry: selecting it keeps the palette open and swaps the list for the host system's font families (via font-kit's SystemSource), fuzzy-filterable. Enter copies the selected family to the clipboard and closes the palette. Each font row shows a hand-drawn (rect-only) rounded copy icon on the right to advertise the action.
• Command palette scrollbar now reuses the terminal scrollbar's look and behaviour through shared primitives in renderer::scrollbar (opacity_from_last_scroll, compute_thumb, draw_thumb) — 6 px wide, [0.6, 0.6, 0.6, 0.5] gray, no rounded corners, 2 s visibility + 300 ms fade after the last scroll event. Only appears when the user has actually scrolled and resets on palette close / query change.
• Sugarloaf::font_family_names() + FontLibrary::family_names() for enumerating the host font catalog.
• Rio Attributes re-exported at the sugarloaf crate root so downstream callers don't have to reach into font_introspector.

0.3.10​

• Fix tab-title overflow spilling into neighbour tabs / off-screen when the title is longer than the tab width (issue #1508). The island was adding the full title as a text span, measuring it, and centering — with no truncation — so a wide text_width produced a negative x offset and the text bled left of the tab's origin. Added Sugarloaf::char_advance(ch, attrs, font_size) (and extended ResolvedGlyph with advance_units + units_per_em, populated once at resolve time alongside the existing fallback walk) so the tab bar can walk titles char-by-char and truncate with a trailing … to fit tab_width - 2·TAB_PADDING_X. Wired TAB_PADDING_X up and dropped its #[allow(dead_code)].

0.3.9​

• Fix progress bar visually freezing at the left edge when a TUI heartbeats OSC 9;4 faster than the indeterminate animation cycle (issue #1509). The island had one progress_last_update field doing double duty as the animation phase reference and the stale-bar dismissal timestamp; every report yanked the animation back to t=0. Now split into progress_started_at (only reset on actual state transitions) and progress_last_seen (bumped every report, drives the 15 s timeout) — same separation ghostty's GTK apprt gets for free from GtkProgressBar.pulse() plus a side glib.timeoutAdd.
• Fix emoji with VS16 variation selector (e.g. 🎟️, ⚠️) visually overflowing into the next grid cell. Rio's font shaper correctly uses cmap format 14 to pick the wide emoji glyph for (base, U+FE0F) clusters, but the grid still budgeted only one cell for the base, so the glyph painted over its neighbour — misaligning vim/tmux vertical split lines on any row containing a text-presentation emoji. Rio now promotes the cell to Wide + Spacer on VS16 (and narrows it back on VS15) for any sequence listed in Unicode's emoji-variation-sequences.txt, matching kitty and ghostty. New workspace crate rio-grapheme-width carries the table (forked from wezterm-char-props, MIT).
• Add scrollback-history-limit config option (default 10000, set to 0 to disable scrollback). Fixes #993.
• Harden Kitty graphics protocol: reject images exceeding 10000 px per axis or 400 MiB, add per-chunk base64 decoding so clients like chafa --format=kitty (which pads every chunk) merge correctly, time out stale chunked uploads after 10 s, combine i=/I=/p= response keys, validate i=/I= mutual exclusion, and require i= for a=q queries.
• Fix kitty image protocol whenever using transmission.
• Fix color picker not rendering correctly.
• Selection feel: bumped the click/drag side-of-cell threshold from 50% to 60% (matches ghostty), so selections no longer flip to the next cell as eagerly when the cursor crosses the midpoint.
• Default URL/path regex now matches local paths in addition to schemed URLs. Ported verbatim from ghostty's src/config/url.zig: rooted (/abs), explicitly-relative (./x, ../x), home (~/x), env-var-rooted ($VAR/x), hidden-dir (.config/x), and bare relative paths with a dotted filename (src/main.rs). Lookbehinds reject mid-word starts (the /bar inside foo/bar) and trailing punctuation (see https://example.com. won't include the period).
• Switch hint regex matching from the Rust regex crate to onig (Oniguruma) — same engine ghostty uses. Adds lookbehind/lookahead support so the default regex matches ghostty's behavior exactly, and user [hints.rules] regexes can now use lookarounds and backreferences.
• When a hint match looks like a local path, rio now resolves it against the terminal's OSC 7 working directory, expands ~/ and $VAR/, and only dispatches the resolved absolute path to the OS opener if the file exists; URL schemes (https://…, mailto:, …) are passed through unchanged.
• Restore OSC 8 hyperlink underlines. The cell repack moved hyperlink data into a side table and the renderer's square.hyperlink().is_some() check was disabled with a // temporarily disabled comment that was never lifted; the renderer now reads the cell's HYPERLINK flag directly so OSC 8 spans are underlined again.
• Fix hover hint underline not appearing on the very first hover after startup. update_highlighted_hints now marks the renderer's pending_update with full terminal damage when the hint changes, mirroring the pre-refactor set_hyperlink_range behaviour, so the partial-damage render path can no longer skip the re-shape.
• Fix two context::title tests panicking under sandboxed builds (e.g. Void's xbps-src) where $HOME=/tmp collapsed the test path to ~. The tests now use a path prefix that can't plausibly be $HOME.

0.3.8​

• Fix click between panels not working if it's on alternative screen.
• Fix divider not appearing (regression of 0.3.7).

0.3.7​

• Reduced GPU upload.
  • ~17k quads before: ~8.5 MB
  • ~17k quads after: ~1.55 MB
  • 5.5x reduction.

0.3.6​

• Performance improvements.
• Now a cell is 8 bytes.

// Bit layout for Square(u64)
//
//   bits  0..20 (21): codepoint (Unicode scalar value, max 0x10_FFFF)
//                     OR low bits of bg color when content_tag != Codepoint
//   bits 21..22 (2):  wide                              (Wide enum)
//   bits 23..29 (7):  per-cell flag bits (CellFlags), incl WRAPLINE at bit 0
//   bits 30..31 (2):  content_tag (NEW)
//                       0 = Codepoint        (text cell, use style_id below)
//                       1 = BgPalette        (bg-only cell, palette index in 32..39)
//                       2 = BgRgb            (bg-only cell, RGB packed in 32..55)
//                       3 = reserved
//   bits 32..47 (16): style_id      (when tag == Codepoint)
//                     bg palette idx in low 8 (when tag == BgPalette)
//                     bg RGB.r:g    in low 16  (when tag == BgRgb)
//   bits 48..63 (16): extras_id     (when tag == Codepoint)
//                     bg RGB.b      in low 8   (when tag == BgRgb)

• Add support for window.columns and window.rows for window sizing. Ignores invalid 0 values with fallback to window.width/window.height, and guarantees a minimum startup size of 300x200 logical pixels.
• Avoid send damage events to Application when terminal already has damage found and unprocessed.
• Fix macOS window close button (red semaphore) showing quit confirmation dialog. Clicking the close button now always closes the window. Quit confirmation is only triggered by Cmd+Q.
• Remove window.macos-use-quit-dialog configuration option.

0.3.5​

• Fix underline cursor rendering.
• Fix underline cursor disappearing on blank cells when window.background-image is set or window.opacity < 1.0. The empty-run dispatch in the renderer now also paints decoration-only spans.
• Fix navigation.unfocused-split-opacity not dimming unfocused splits. The setting is now applied as a semi-transparent overlay drawn on top of inactive panes and works correctly on both opaque and transparent windows. Default raised from 0.4 to 0.7 and clamped to [0.15, 1.0].
• Add navigation.unfocused-split-fill: RGB tint used for the unfocused-split overlay. Defaults to the terminal background color.
• Re-implement window.background-image. It had been a silent no-op since the renderer rewrite — setting it would clear the window to transparent and paint nothing on top. The image is now uploaded into a dedicated GPU texture sized exactly to the source dimensions (no glyph-atlas pollution, no atlas-size limit) and stretched to cover the full window.
• Add window.background-image.opacity: 0.0–1.0 multiplier applied to the image's alpha channel. Defaults to 1.0.
• Breaking: removed window.background-image.width, height, x, and y. They had no effect under the old implementation and the new dedicated pipeline always fills the window.
• Surface background-image load failures (missing path, decode error) through the in-window assistant warning popup instead of a silent log line.
• Fix FreeBSD build.

0.3.4​

• Fix kitty image protocol overlay when has a new tab.
• Fix kitty image protocol placeholder content being rendered.

0.3.3​

• CPU rendering support by renderer.use-cpu.
• Removed Font char cache friction.
• Fix kitty image protocol and sixel.

0.3.2​

• Performance: Skip shaping for empty cells, perf gain can be over 50% depending of the visible rows.
• Private user area should adjust based on cells.
• Cells now by default are created with \0.
• Selection ignore \0 cells.

0.3.1​

• Fix crash when filters option is on.

0.3.0​

• Quit Confirmation Dialog: New in-window quit screen with Rio logo, triggered by Cmd+Q / confirm-before-quit
  • Respond with y to quit or n to cancel
  • Optional native macOS quit dialog via window.macos-use-quit-dialog config
• Kitty Graphics Protocol: Display images directly in your terminal
  • Direct placements (U=0)
  • Virtual placements (U=1)
  • Diacritic-based row/column encoding (283 combining characters)
  • RGB color encoding for image/placement IDs (24+8 bit support)
  • Virtual placement rendering (infrastructure complete, rendering pending)
• Sixel Graphics: Full support with proper scrolling and positioning
• Graphics Rendering Improvements:
  • Fixed vertical positioning alignment
  • Fixed scrolling (images persist when origin scrolls off-screen)
  • Fixed duplicate rendering with per-frame deduplication
  • LRU cache with automatic eviction
• Native Metal Support (macOS): Hardware-accelerated rendering with Metal
• New GPU-Rendered Navigation: Faster, smoother tab interface
• Command Palette: Quick access to terminal functions
• Toggle Appearance Theme: Switch between dark and light themes at runtime via key binding (ToggleAppearanceTheme) or command palette (only available when adaptive theme is configured)
• Custom Mouse Cursor: Configurable mouse cursor effects via effects.custom-mouse-cursor
• Trail Cursor: Smooth spring-animated cursor trail using neovide-style physics (enabled by default via effects.trail-cursor)
• Desktop Notifications: Support for OSC 9 (iTerm2) and OSC 777 (rxvt) terminal notifications using native platform APIs (macOS UNUserNotificationCenter, Linux D-Bus, Windows Toast)
• Force Theme: New force-theme configuration property to override the system theme when using adaptive themes
• Quake Window Mode: Drop-down terminal from top of screen
• macOS Traffic Light Positioning: Customize position of window control buttons
  • Configure via macos-traffic-light-position-x and macos-traffic-light-position-y
  • Defaults to standard macOS positioning (11.4, 16.1)
  • Not available in Tab navigation mode
• OSC 9;4 Progress Bar Support: Terminal progress indicator (ConEmu/Windows Terminal compatible)
• Scroll Bar: Overlay scroll bar that appears on scroll and fades out after 2s
  • Works per-panel in split views
  • Draggable thumb with click-on-track jump scrolling
  • Configure via enable-scroll-bar (enabled by default)
• Tab Title RELATIVE_PATH variable: New template variable that shows a home-relative shortened path (e.g. ~/Documents/a/rio or …/a/psone/starpsx). Default tab title on macOS/Linux changed to {{ TITLE || RELATIVE_PATH }}.
• Wgpu now is always f32.
  • This fixes non arm chip macos use cases.

Breaking Changes

• Navigation modes simplified - if you use TopTab, BottomTab, or Bookmark, change to:

  [navigation]
  mode = "Tab"
  

• Default Decorations changed to Transparent on macOS (was Enabled)
• Removed: TopTab, BottomTab, and Bookmark navigation modes
• Available modes: Plain, Tab, NativeTab (macOS only)
• Tab color configuration simplified: Removed tabs-foreground, tabs-active-foreground, and tabs-active-highlight
  • Use tabs for inactive tab text and border color (default: #cccccc)
  • Use tabs-active for active tab text color (default: #ffffff)
• The old padding api became margin:

  # It will apply margin rules to the main container
  # CSS-Like
  margin = [10] # (10px to all)
  margin = [10, 5] # (top and bottom margin are 10px, right and left margin are 5px)
  margin = [10, 5, 15, 20] # (top margin is 10px, right margin is 5px, bottom margin is 15px, left margin is 20px)
  
  # It will apply margin rules to panels
  [panel]
  margin = [5] # (5px to all)
  row-gap = 0 # (0px)
  column-gap = 0 # (0px)
  

Technical Details

• Complete rendering architecture rewrite for GPU-based UI
• Parser now supports APC sequences for Kitty graphics protocol
• Removed legacy layer/quad rendering system
• Added Metal backend for macOS, split WebGPU backend for cross-platform
• New kitty_virtual module for placeholder encoding
• Graphics cleanup with LRU eviction strategy (evicts up to 5 oldest when atlas full)
• Added 5 unit tests for graphics rendering (positioning, LRU, deduplication)

0.2.36​

• Fix DECSCUSR.

0.2.38​

• Update wgpu to v0.28.
• Update Rust to v1.92.

0.2.37​

• Support window bg color via OSC.
• Fix vi cursor not displayed when moving.
• Fix font loader for fallbacks and extra.
• Fix font size updating through config.

0.2.36​

• Fix handler should process two intermediate bytes in CSI sequences by @aymanbagabas.
• Fix DECSCUSR.

0.2.35​

• GPU memory usage drop 83%.
• Sync input render logic (macos).

0.2.34​

• Fix issue for finding fonts introduced with the v0.2.33 new font loader.

0.2.33​

• Platform-specific configuration improvements #1341:
  • Added support for platform-specific environment variables via env-vars field in platform config
  • Platform-specific env-vars are now appended to global env-vars instead of replacing them
  • Fixed configuration inheritance: platform overrides now use field-level merging instead of replacing entire sections
  • Window, Navigation, and Renderer settings can now be partially overridden per platform without duplicating all fields
  • Added theme field to platform config for per-platform theme selection
  • Shell configuration continues to use complete replacement for simplicity
• Fix ScrollPageUp and ScrollPageDown actions not working in custom keybindings #1275.
• Fix Noticeably slower startup compared to wezterm, foot #1346.
• Fix Font loader taking a LOT of time to load fonts #1339.
• Fix Rio panics on launch on a Raspberry Pi 5 #1332.
• Fix kitty keyboard protocol.
• Support reporting terminal version via XTVERSION.

0.2.32​

• Updated WGPU to v27.0.1.
• Fix No backend are enabled on FreeBSD #1235.

0.2.31​

• Update Rust to v1.90.
• Fix kitty keyboard recognition.
• Breaking: Simplified key binding escape sequences
  • Replaced separate text and bytes fields with a single esc field
  • Escape sequences are now sent directly to the PTY without text manipulation
  • Migration: Replace bytes = [27, 91, 72] with esc = "\u001b[H"
  • Migration: Replace text = "some text" with esc = "some text"
  • Example: { key = "l", with = "control", esc = "\u001b[2J\u001b[H" } to clear screen
• Fix key binding conflicts: Resolved issues where keys like PageUp, PageDown, and Alt+Enter required explicit "None" bindings before they could be reassigned
  • Simplified binding conflict resolution logic to automatically remove conflicting default bindings
  • User-defined bindings now always take precedence without requiring placeholder "None" entries

0.2.30​

• Fix Debian/Ubuntu package installation: Resolved terminfo conflicts with system packages #1264
  • Debian (.deb) packages no longer include terminfo files to avoid conflicts with ncurses-term
  • Users on Ubuntu 22.04 and older need to manually install terminfo after package installation
  • Debian 13+ and Ubuntu 24.04+ users get terminfo from system's ncurses-term package
  • RPM packages continue to include terminfo as before
• Add audible & visual bell support #1284.

0.2.29​

• Fix blinking cursor issue #1269.
• Fix Rio uses UNC (?) path as working directory, breaking Neovim subprocesses on Windows.
• Add NSCameraUseContinuityCameraDeviceType to plist for macOS.

0.2.28​

• Optimized rendering pipeline for improved performance: Implemented deferred damage checking and render coalescing
  • Added Wakeup events to batch multiple rapid terminal updates into single render passes
  • Deferred damage calculation until render time to reduce unnecessary computations
  • Skip rendering for unfocused windows when disable_unfocused_render is enabled
  • Skip rendering for occluded windows when disable_occluded_render is enabled
  • Improved damage merging to always accumulate updates even when already marked dirty
  • Enhanced performance for rapid terminal output by coalescing non-synchronized updates

0.2.27​

• Breaking: If xterm-rio is installed we prioritized it over rio terminfo.
• Fix sixel/iterm2 graphics persistence issue: Fixed graphics remaining visible when overwritten by text
  • Graphics are now properly removed when cells containing them are overwritten
  • Fixes issues with file managers like Yazi where images would persist incorrectly
  • Simplified graphics cleanup logic by removing unused ClearSubregion functionality
• CJK Font Metrics: Fixed CJK characters displaying "higher" than Latin characters #1071
  • Implemented comprehensive CJK font metrics handling with consistent baseline adjustment
  • Fixed scrolling issues for mixed Latin and CJK text content
  • Added CJK character width measurement using "水" (water ideograph) as reference
  • Created consistent cell dimensions across different font types
  • Developed extensive test suite with 40+ font-related tests to verify fixes

0.2.26​

• Fix frame dropping in release builds: Fixed an issue where release builds would drop frames due to damage event timing
  • Damage events are now emitted directly after parsing PTY data, ensuring proper batching
  • Removed redundant Wakeup event mechanism that was causing multiple renders per update
  • Synchronized update timeouts now properly emit damage events
  • Significantly improves rendering smoothness in optimized builds

0.2.25​

• Fix: Rio doesn't launch from context menu on Windows.
• Fix: Rio lacks embedded icon on Windows 10 by @christianjann.
• Fix custom shells in /usr/local/bin not found on macOS: Fixed an issue where custom shells installed in /usr/local/bin were not found when Rio was launched from Finder or other GUI applications
  • On macOS, Rio now uses /usr/bin/login to spawn shells, ensuring proper login shell environment with full PATH
  • Custom shells like Fish, Nushell, or custom Zsh installations in /usr/local/bin will now work correctly

0.2.24​

• Fix game mode regression.
• Hint Label Damage Tracking: Improved hint label rendering performance with proper damage tracking
  • Hint label areas are now properly marked for re-rendering when cleared
  • Eliminates visual artifacts when hint labels are removed
  • Optimized rendering to only update affected screen regions
• Configurable Hyperlink Hover Keys: Hyperlink hover modifier keys are now configurable
  • Configure custom modifier keys through the hints system in config.toml
  • Default behavior unchanged: Command on macOS, Alt on other platforms
  • Supports any combination of Shift, Control, Alt, and Super/Command keys
  • Example: mouse = { enabled = true, mods = ["Shift"] } to use Shift key
• Hints Configuration: Renamed hints.enabled to hints.rules for better clarity
  • Update your configuration: [[hints.enabled]] → [[hints.rules]]
  • All hint configuration sections now use hints.rules.* instead of hints.enabled.*
  • Functionality remains the same, only the configuration key names changed

0.2.23​

• Fix some rendering regressions introduced by 0.2.21.
• Improve performance by stopping locking on rendering run steps.
• Fix: X11: WM_CLASS has an empty string property.

0.2.22​

• Fix some regressions introduced by 0.2.21.

0.2.21​

• Breaking: navigation.use-current-directory has been renamed to navigation.current-working-directory.

Performance Optimizations​

• Major: Implemented efficient CVDisplayLink-based VSync synchronization for macOS
  • Perfect frame timing aligned with display hardware refresh cycles
  • Eliminates screen tearing and stuttering through hardware VSync synchronization
  • Adaptive refresh rate support: automatically handles 60Hz, 120Hz, ProMotion displays
  • Multi-display support: adapts when windows move between displays with different refresh rates
  • Grand Central Dispatch (GCD) integration for thread-safe cross-thread communication
  • Smart rendering: Only renders when content actually changes using dirty flag system
  • Power efficient: skips unnecessary redraws when content is static, reducing CPU usage
  • Professional rendering quality with smooth, tear-free visual updates
  • CVDisplayLink runs on dedicated background thread, never blocking UI operations
• macOS VSync Optimization: Disabled redundant software-based vsync calculations on macOS
  • CVDisplayLink already provides hardware-synchronized VSync timing
  • Eliminates unnecessary frame timing calculations and monitor refresh rate queries
  • Reduces CPU overhead and improves rendering performance
  • Software vsync logic remains active on other platforms for compatibility
• Major: Implemented a new text run caching system replacing line-based caching
  • Up to 96% reduction in text shaping overhead for repeated content
  • Individual text runs (words, operators, keywords) cached and reused across frames
  • 256-bucket hash table with LRU eviction for optimal memory usage
• Cache Warming: Pre-populate cache with 100+ common terminal patterns on startup
  • Programming keywords: const, let, function, class, import, export, etc.
  • Indentation patterns: 4/8/12/16 spaces, single/double/triple tabs
  • Shell commands: ls, cd, git, npm, cargo, sudo, etc.
  • Operators & punctuation: =, ==, =>, ();, {}, [], etc.
  • File extensions: .js, .ts, .rs, .py, .json, .md, etc.
  • Error/log patterns: Error:, [INFO], FAILED, SUCCESS, etc.
  • Immediate cache hits eliminate cold start shaping delays
• SIMD-Optimized Whitespace Detection: Multi-tier optimization for indentation processing
  • AVX2: 32 bytes per instruction (x86-64 with AVX2 support)
  • SSE2: 16 bytes per instruction (x86-64 with SSE2 support)
  • NEON: 16 bytes per instruction (ARM64/aarch64)
  • Optimized scalar: 8-byte chunks (universal fallback)
  • Up to 32x performance improvement for long indentation sequences
  • Critical for Python, nested JavaScript/TypeScript, YAML, and heavily indented code
• Memory Pool for Vertices: High-performance vertex buffer pooling system
  • Size-categorized pools: Small (64), Medium (256), Large (1024), XLarge (4096) vertices
  • Zero allocation overhead through buffer reuse across frames
  • LRU management with automatic cleanup when pools reach capacity
  • Thread-safe concurrent access with performance monitoring
  • Eliminates GC pressure and improves frame rate consistency
• Background Font Operations: Non-blocking font management
  • Font data release and cleanup in dedicated background thread
  • System font scanning and preloading without blocking main thread
  • Prevents frame rate drops during font operations
• Occlusion-Based Rendering: Skip rendering for occluded windows/tabs
  • Automatically detects when windows are completely hidden by other windows
  • Skips rendering for occluded windows to save GPU resources and improve performance
  • Renders one frame when window becomes visible again to ensure display is updated
  • Configurable via [renderer] disable-occluded-render = true (enabled by default)
  • Significantly improves performance when running multiple tabs or windows

Other Improvements​

• Optimize the character cluster cache for wide space characters.
• New font atlas, more efficient.
• Implemented around 75% Memory Reduction: Text glyphs now use R8 (1 byte) instead of RGBA (4 bytes).
• Hint Label Damage Tracking: Improved hint label rendering performance with proper damage tracking
  • Hint label areas are now properly marked for re-rendering when cleared
  • Eliminates visual artifacts when hint labels are removed
  • Optimized rendering to only update affected screen regions
• IME Cursor Positioning: Added configurable IME cursor positioning based on terminal cell coordinates
  • IME input popups now appear precisely at the cursor position
  • Improves input experience for CJK languages (Chinese, Japanese, Korean)
  • Configurable via [keyboard] ime-cursor-positioning = true (enabled by default)
• Shift+Click Selection: Added Shift+click support for expanding text selections
  • Shift+clicking now extends the current selection to the clicked cell
  • Provides standard terminal selection behavior expected by users
  • Regular clicking without Shift still clears selection and starts new one as before
• CLI accepts relative paths for working directory CLI argument: When invoking rio from other terminals using rio --working-dir=<path>, a relative path is now correctly processed

Bug Fixes​

• Cursor Damage Tracking: Fixed cursor rendering issues after clear command and during rapid typing
  • Replaced complex point-based damage tracking with simplified line-based approach
  • Eliminates edge cases where cursor updates were missed during fast typing sequences
  • Improved reliability by always damaging entire lines instead of tracking column ranges
  • Aligns with modern terminal design principles for more robust damage calculation
• Selection Rendering: Fixed selection highlight not appearing on first render
  • Selection changes now properly trigger damage tracking and rendering
  • Optimized selection damage to only redraw affected lines for better performance
  • Selection highlights now appear immediately when making selections
• Text Selection: Fixed selection behavior during input and paste operations
  • Selection properly clears when typing or pasting text (both bracketed and regular paste)
  • Selection coordinates remain stable during viewport scrolling
  • Prevents selection from being lost unexpectedly during normal terminal usage
• Auto-scroll on Input: Fixed issue where typing after scrolling up wouldn't automatically scroll to bottom
  • Now properly scrolls to bottom for both keyboard input and IME/paste operations
  • Ensures cursor remains visible when typing new content
• Scroll Performance: Improved scrolling performance by optimizing render event handling
  • Moved scroll display offset update before mouse cursor dirty event
  • Removed redundant render calls during scroll operations
  • Implemented centralized damage-based rendering in event loop for better performance
• macOS IME Improvements: Fixed emoji input and IME stability issues
  • Resolved IMKCFRunLoopWakeUpReliable errors when using emoji picker
  • Improved coordinate validation and error handling for IME positioning
  • Better handling of direct Unicode input (emoji picker, character viewer)
  • Added throttling to prevent excessive IME coordinate updates
• Documentation: Added comprehensive manual pages (man pages) for Unix-like systems
  • man rio - Main Rio terminal manual page with command-line options
  • man 5 rio - Complete configuration file format documentation
  • man 5 rio-bindings - Key bindings reference and customization guide
  • Available in extra/man/ directory with build instructions
• Terminfo Compatibility: Improved terminal compatibility by adding xterm-rio terminfo entry
  • Added xterm-rio as primary terminfo entry with rio as alias for better application compatibility
  • Applications that look for "xterm-" prefixed terminals (like termwiz-based apps) now work correctly
  • Maintains TERM=rio environment variable for consistency with terminal identity
  • Fixes crashes with applications like gitu and other termwiz-based terminal programs
  • Follows same pattern as other modern terminals (Alacritty, Ghostty) for maximum compatibility

Technical Details​

The performance optimizations in this release represent a significant architectural improvement to Rio's text rendering pipeline:

• Text Run Caching: Replaces line-based caching with individual text run caching. Each unique text sequence (word, operator, keyword) is shaped once and reused across all occurrences.
• SIMD Implementation: Platform-adaptive SIMD instructions automatically detect and use the best available CPU features (AVX2 > SSE2 > NEON > optimized scalar) for maximum performance across different architectures.
• Memory Management: The vertex pool system uses size-categorized buffers with LRU eviction, eliminating allocation overhead while preventing memory bloat.
• Cache Strategy: Two-level caching (render data + text runs) with 256-bucket hash table using FxHasher for optimal lookup performance.
• Compatibility: All optimizations maintain full backward compatibility with existing Rio APIs and configurations.

These changes are particularly beneficial for:

• Programming workflows with repetitive code patterns
• Terminal sessions with heavy indentation (Python, nested JS/TS, YAML)
• Long-running sessions where cache warming provides sustained performance benefits
• Systems with limited memory where reduced allocation overhead improves overall responsiveness

Bug Fixes​

• Backspace Key Compatibility: Fixed backspace key not working properly in vim when TERM=xterm-256color
  • Changed backspace key bindings to send BS (0x08) instead of DEL (0x7F)
  • Updated Rio terminfo and termcap entries to match actual key behavior
  • Updated XTGETTCAP response to return ^H for kbs capability
  • Ensures compatibility with applications expecting xterm-256color backspace behavior
  • Fixes issue where vim would display ^? instead of performing backspace operation

0.2.20​

• Performance: Implemented SIMD-accelerated UTF-8 validation throughout Rio terminal using the simdutf8 crate.
  • Architecture support: AVX2/SSE4.2 (x86-64), NEON (ARM64), SIMD128 (WASM)
  • Automatic optimization: Runtime detection selects fastest implementation available
• Support for XTGETTCAP (XTerm Get Termcap) escape sequence for querying terminal capabilities.
• Font library is now under a RWLock instead of Mutex to allow multiple tabs readings same font data.
• Fix: crash on openSUSE Tumbleweed #1160.

0.2.19​

• Reduced the bundle size by ~20.81% (MacOS, Linux, BSD).
• Performance: stop saving empty images in the image cache.
• Fix: On MacOS, keybind definition to ignore cmd-w does not work #879.
• Fix: Build for MacOS 26 Tahoe.
• Fix: Enter,Tab, Backspace not disambiguated with shift in kitty keyboard's disambiguate mode.
• Fix: line-height adds small gaps for box-drawing characters #1126.
• Search matching a wrapping fullwidth character in the last column.
• Update Rust to 1.87.0.

0.2.18​

• Fix image display crashing the application whenever f16 is available.

0.2.17​

• Breaking: Decorations as Enabled is default on MacOS (instead of Transparent).
• F16 Texture supports whenever is available.
• Clear font atlas whenever the font is changed.
• Skip passing sandbox env in Flatpak, fixes user environment in spawned shell #1116 by @ranisalt.
• On Windows, fixed crash in should_apps_use_dark_mode() for Windows versions < 17763.

0.2.16​

• Breaking: support reading from config directory using $XDG_CONFIG_HOME on Linux #1105 by @ranisalt.
• Fix: Crash on whenever attempting to clean an invalid line index.
• Add metainfo and screenshots for appstream by @ranisalt.

0.2.15​

• Fix: In some cases, the first typed character doesn't display until after a delay, or until another key is hit #1098.
• Fix: Anomalous behavior occurs with the Bookmark tab style in the new versions 0.14 and 0.13. #1094.

0.2.14​

• Fix: panic and crash of terminal window during sudo apt update #1093.

0.2.13​

• Breaking change: For Windows and Linux users, hyperlink trigger whenever hovering a link was changed from alt to shift.
• Fix dimension for whenever a new tab is created from a view with splits.
• Drop subtables with empty coverage by @xorgy.
• Fix font size affecting tabs size.
• Support to drawable characters by using fonts.use-drawable-chars = true.
• Fix: Wrong unicode character alignment #616.
• Fix: Built-in font for box drawing #974 #974.
• Fix: U+E0B6 and U+E0B4 Unicode with different sizes #895.
• Update wgpu to v25.
• Fix: Custom rendering (alignment) of Braille symbols #1057.
• Fix: Drawing char ⡿ in column 1 causes the entire terminal to stutter #1033.
• Fix: Some glyphs (e.g. braille symbol) are rendered with gaps in between #930.
• Introduce fonts.disable-warnings-not-found to disable warning regarding fonts not found.
• Fix: Request: silently ignore missing fonts from fonts.family and fonts.family.extras #1031.
• Fix: Add branch drawing symbols to box characters #761.
• Fix: macOS: fallback for missing font glyph? #913.
• Fix: FPS calculation, before it was rendering avg 48 on 60fps screen, however it was due to wrong frame scheduling computations, now it's up to 56-58.
• Fix: Shift+Tab event is doubled, as if hit twice #1061.
• Fix: Request: Option to change click-link modifier key #1059.
• Fix: Unexpected tmux previous-window #1062.
• Rewrite the way Rio deals with line diff and updates computation.
• Support for setting a custom config directory using $RIO_CONFIG_HOME
• Support for additional font dirs using fonts.additional-dirs
• Rio's MSRV is 1.85.0.
• Support to Sextants.
• Fix: Octant support #814.
• Fix: Issue regarding split not updating opacity style when getting unfocused.
• Add support for custom parsing of APC, SOS and PM sequences.

0.2.12​

• Fix crash regarding fonts not found whenever trying to run Rio.

0.2.11​

• Fix filter scanlines not appearing.
• rt(wgpu): clamp texture size to device limits by @chyyran.
• Support to builtin filters: newpixiecrt and fubax_vr.
• Fix dimension computation whenever resizing Rio.
• Removed fonts.ui property, now Rio will always use primary font for UI.
• Removed Text renderer mod by migrating to RichText renderer.
• Breaking: renderer.strategy = "Continuous" was renamed to renderer.strategy = "Game"
• Fix search bar can't show chinese #844.

0.2.10​

• Fix computation of lines on screen.
• Fix dimension of the first tab whenever TopTab or BottomTab is created.
• Fix flaky test issue, test_update_title_with_logical_or failing randomly on aarch64 #994.
• Support to navigation.unfocused_split_opacity, default is 0.5.
• Sugarloaf: Fix foreground color opacity not being computed.

0.2.9​

• Support to symbol map configuration: fonts.symbol-map:

# covers: '⊗','⊘','⊙'
fonts.symbol-map = [{ start = "2297", end = "2299", font-family = "Cascadia Code NF" }]

• Add Switch to Next/Prev Split or Tab command by @vlabo.
• Fix issue whenever the first main font cannot be found.

0.2.8​

• Support to .rpm files! (thanks @vedantmgoyal9 and @caarlos0)
• OSC 7 Escape sequences to advise the terminal of the working directory.
• Use GoReleaser to build & release Rio (#921), thanks @caarlos0 and @vedantmgoyal9
• Cache GSUB and GPOS features independently.
• Updated windows-sys to v0.59.
  • To match the corresponding changes in windows-sys, the HWND, HMONITOR, and HMENU types now alias to *mut c_void instead of isize.

0.2.7​

• Shifted key reported without a shift when using kitty keyboard protocol.
• fix: Set cursor color via ANSI escape sequence #945.
• fix: Can the "base 16" colors be changed at runtime through Ansi escape sequences? #188
• fix: Changing release and nightly build Ubuntu runners for x86 (ubuntu-latest to ubuntu-22.04) and arm (ubuntu-24.04-arm to ubuntu-22.04-arm)

0.2.6​

• Fix: 0.2.5 doesn't render grey scale font on macOS #937.
• fix: fix duplicate tab_id by monotonic counter for unique tab IDs by @hilaolu.
• Add backslash to invalid characters for URL regex.
• fix regression introduced by 0.2.5 on light colors.
• fix: CMD+W open new tab but not new window occasionally #756.
• fix: Error getting window dimensions on Wayland #768.

0.2.5​

• Introduced draw-bold-text-with-light-colors config, default is false.
• If light or dark colors are not specified Rio will try to convert it based on the regular color.
• Fix: Block writing to the shell when rendering the Assistant route.
• Fix: Immediately render the Terminal route when switching from the Assistant, ConfirmToQuit or Welcome, thus avoiding the need to double press Enter.
• Fix: MacOS Unable to type Option + Number for special characters #916.
• Fix: Looking forward to having a color converter #850.
• Fix: Unexpected basic 16 terminal colors displayed on some apps #464.

0.2.4​

• Breaking: Rio now doesn't allow anymore disable kitty keyboard protocol.
• Fullwidth semantic escape characters.
• Fix: report of Enter/Tab/Backspace in kitty keyboard.
• Fix: use-kitty-keyboard-protocol = true doesn't work with tmux #599.
• Fix: use-kitty-keyboard-protocol breaks F[5-12] on macOS #904.
• Downgrade MSRV to 1.80.1
• Update wgpu to 24.0.0.

0.2.3​

• Rio now allows you to configure window title through configuration via template. Possible options:
  • TITLE: terminal title via OSC sequences for setting terminal title
  • PROGRAM: (e.g fish, zsh, bash, vim, etc...)
  • ABSOLUTE_PATH: (e.g /Users/rapha/Documents/a/rio)
  • COLUMNS: current columns
  • LINES: current lines
    • So, for example if you have: {{COLUMNS}}x{{LINES}} would show something like 88x66.
• Perf improvement on text selection #898 by @marc2332.
• Window title is now updated regardless the Navigation Mode.
• Performance: Background and foreground data are only retrieved if is asked (either color automation is enabled or window.title contains any request for it).
• Fixed: Nix build #853.
• Support to window.macos-use-shadow (enable or disable shadow on MacOS).
• Support to window.windows-corner-preference (options: Default, DoNotRound,Round and RoundSmall).
• Support to window.windows-use-undecorated-shadow (default is enabled).
• Support to window.windows-use-no-redirection-bitmap (This sets WS_EX_NOREDIRECTIONBITMAP).
• Minimal stable rust version 1.84.0.
• Support for Unicode 16 characters.
• Support to line height.
• Renamed --title to --title-placeholder on CLI.
• Fixed: Deb package name 'rio' conflicts with existing one in Ubuntu #876.
• Fixed: Unremovable bottom padding when using line-height #449.
• On macOS, fixed undocumented cursors (e.g. zoom, resize, help) always appearing to be invalid and falling back to the default cursor.
• Introduce SwitchCurrentTabToPrev and SwitchCurrentTabToNext actions #854 by @agjini.
• On X11, Wayland, Windows and macOS, improved scancode conversions for more obscure key codes.
  • On macOS, fixed the scancode conversion for audio volume keys.
  • On macOS, fixed the scancode conversion for IntlBackslash.
• Kitty keyboard protocol is now enabled by default.
• Allow Renderer to be configured cross-platform by Platform property.
• Add ToggleFullscreen to configurable actions.
• Escape sequence to move cursor forward tabs ( CSI Ps I ).
• Always emit 1 for the first parameter when having modifiers in kitty keyboard protocol.
• Microsoft Windows: fix the event loop not waking on accessibility requests.
• Wayland: disable title text drawn with crossfont crate, use ab_glyph crate instead.
• Sugarloaf: Expose wgpu.

0.2.2​

• Fix iterm2 image protocol.
• Allow setting initial window title #806 by @xsadia.
• Fix runtime error after changing to a specific retroarch shader on windows #788 by @chyyran.
• Makes editor.args and shell.args optional in config.toml #801 by @Nylme.
• Introduce navigation.open-config-with-split.

0.2.1​

• Fix: Search seems broken in 0.2.0 #785.
• Regular font is now 400 as default weight.
• Support to chooseing font width #507.
• Support to multiconfiguration. Rio now allows you to have different configurations per OS, you can write ovewrite Shell, Navigation and Window.

Example:

[shell]
# default (in this case will be used only on MacOS)
program = "/bin/fish"
args = ["--login"]

[platform]
# Microsoft Windows overwrite
windows.shell.program = "pwsh"
windows.shell.args = ["-l"]

# Linux overwrite
linux.shell.program = "tmux"
linux.shell.args = ["new-session", "-c", "/var/www"]

• Fix: Grey triangle in the titlebar #778
• Update window title straight away (#779 by @hunger)
• Always update the title on windows and MacOS (#780 by @hunger)

0.2.0​

• Note: The migration from 0.1.x to v0.2.x changed considerably the renderer source code, although it was tested for 3 weeks it's entirely possible that introduced bugs (hopefully not!).
• Performance gains!
  • Sugarloaf: Major rewrite of font glyph logic.
  • Sugarloaf: Removal of some unnecessary processing on shaping logic.
  • Sugarloaf: Rewrite/Change of render architecture, now sugarloaf does not have any reference to column/lines logic.
• Breaking: Minimum MacOS version went from El Captain to Big Sur on ARM64 and Catalina on Intel x86.
• Microsoft Windows: Rio terminal is now available on WinGet packages.
• Microsoft Windows: Rio terminal is now available on MINGW packages.
• Microsoft Windows: Rio support on ARM architecture by @andreban.
• Allow MacOS automation via events.
• MacOS: Support titlebar unified: window.macos-use-unified-titlebar = false,
• Support disable font hinting: fonts.hinting = false.
• Fix: Configuration updates triggered multiple times on one save.
• Support to RetroArch shaders @igorsaux.
• Fix: Set notepad as a default editor on Windows by @igorsaux.
• Increased Linux font fallbacks list.
• Early initial split support (this feature is not yet stable).
• Fix: Preserve current working directory when opening new tabs #725.
• Added SplitDown, SplitRight, CloseSplitOrTab, SelectNextSplit and SelectPrevSplit actions.
• Fix: Window doesn't receive mouse events on Windows 11 by @igorsaux.
• Support to hex RGBA (example: #43ff64d9) on colors/theme by @bio on #696.
• Introduced renderer.strategy, options are Events and Continuous.
• Microsoft Windows: make ControlFlow::WaitUntil work more precisely using CREATE_WAITABLE_TIMER_HIGH_RESOLUTION.
• Fix: Window output lost when rio loses focus #706.
• Updated wgpu to 23.0.0.

0.1.17​

• Fix flash of white during startup on Microsoft Windows #640.
• Add DWMWA_CLOAK support on Microsoft Windows.
• VI Mode now supports search by @orhun.
• Use max frame per seconds based on the current monitor refresh rate.
• breaking renderer.max-fps has been changed to renderer.target-fps.
• Fix background color for underline and beam cursors when using transparent window.
• Fix IME color for underline and beam cursors.
• Add default for Style property on Sugarloaf font.

0.1.16​

• Support auto bold on fonts.
• Support auto italic on fonts.
• Reduced default regular weight to 300 instead of 400.
• MacOS: Add dock menu.
• MacOS: Add Shell and Edit menu.
• MacOS: Support to native modal that asks if wants to close app.
• MacOS: Fix confirm-before-quit property.

0.1.15​

• Introduce cursor.blinking-interval, default value is 800ms.
• Fix blinking cursor lag issue.
• performance: Use Vec (std based) instead of ArrayVec for copa.
• Fix adaptive theme background color on macos.
• Decorations as Transparent is default on MacOS.
• Navigation mode as NativeTab is default on MacOS.
• keyboard.use-kitty-keyboard-protocol is now false by default.
• Add support for msys2/mingw builds release #635 by @Kreijstal.

0.1.14​

• developer.log-file has been renamed to developer.enable-log-file.
• breaking: CollapsedTab has been renamed to Bookmark.
• Memory usage reduced by 75% (avg ~201mb to 48mb on first screen render).
• Implemented font data deallocator.
• Reduced font atlas buffer size to 1024.
• Added lifetimes to application level (allowing to deallocate window structs once is removed).
• Migrated font context from RwLock to Arc<FairMutex>.
• MacOS does not clear with background operation anymore, instead it relies on window background.
• Background color has changed to #0F0D0E.
• Fix font emoji width.
• Fix MacOS tabbing when spawned from a new window.

0.1.13​

• Support to iTerm2 image protocol.
• Fix: Issue building rio for Void Linux #656.
• Fix: Adaptive theme doesn't appear to work correctly on macOS #660.
• Fix: Image background support to OpenGL targets.
• Fix: Unable to render images with sixel protocol & ratatui-image #639.
• Implement LRU to cache on layout and draw methods.
• Reenable set subtitle on MacOS native tabs.

0.1.12​

• Introduce: renderer.max-fps.
• Fix: Cursor making text with ligatures hidden.
• Fix: Underline cursor not working.
• Fix: sixel: Text doesn't overwrite sixels #636.
• Initial support to Sixel protocol.
• Support to fonts.emoji. You can also specify which emoji font you would like to use, by default will be loaded a built-in Twemoji color by Mozilla.

In case you would like to change:

# Apple
# [fonts.emoji]
# family = "Apple Color Emoji"

# In case you have Noto Color Emoji installed
# [fonts.emoji]
# family = "Noto Color Emoji"

• Support to fonts.ui. You can specify user interface font on Rio.

Note: fonts.ui does not have live reload configuration update, you need to close and open Rio again.

[fonts.ui]
family = "Departure Mono"

• breaking: Revamp the cursor configuration

Before:

cursor = '▇'
blinking-cursor = false

After:

[cursor]
shape = 'block'
blinking = false

0.1.11​

• Experimental support to Sixel protocol.
• Clipboard has been moved to Application level and shared to all windows.
• Replace run with run_app.
• Support CSI_t 16 (Report Cell Size in Pixels).
• Support CSI_t 14 (Report Terminal Window Size in Pixels).
• Fix on all the issues regarding whenever the font atlas reaches the limit.
• breaking change: collapsed tabs use now tabs-active-highlight instead of tabs-active.
• Default font for UI has changed to DepartureMono.
• Performance: drop extra texture creation and manipulation.
• Fix on windows: If editor is not found, the app panics #641.
• Improvements on window.background-image as respect width and height properties if were used.
• Macos: remove grab cursor when dragging and use default instead.
• Fix tabs-active-highlight config key #618.
• Add tabs-active-foreground config key #619.
• Add tabs-foreground config key.
• use-kitty-keyboard-protocol is now true as default.
• Remove tokio runtime.
• Allow configuring with lowercase values for enums.
• Rename hide-cursor-when-typing to hide-mouse-cursor-when-typing.
• Cleanup selection once happens a resize.
• Windows: Reduce WM_PAINT messages of thread target window.

0.1.10​

• Refactor/Simplify close tabs logic internally.
• Fix: NativeTab margin top when hide-if-single is true.
• Fix: Search bar width on 1.0 dpi screens.
• Fix: Windows - The behavior of using a complete shell command and a shell command with parameters is inconsistent #533.
• X11: Replace libxcursor with custom cursor code.
• Fix: Kitty keyboard protocol shifted key codes are reported in wrong order #596.
• Fix: Mouse pointer hidden (Ubuntu Wayland) / Cursor icon not changing #383.
• Enable search functionality as default on Linux.
• Enable search functionality as default on Microsoft Windows.
• Add command for closing all tabs except the current one (CloseUnfocusedTabs)

0.1.9​

• Search support.
• New theme properties search-match-background, search-match-foreground, search-focused-match-background and search-focused-match-foreground.
• Fix bug Tab indicator doesn't disappear #493.
• Fix color automation on tabs for linux.
• Update tabs UI styles (make it larger and able to show more text when necessary).
• Corrections on underline render proportions for different DPIs.
• Support writing the config to a custom/default location via --write-config (Ref: #605).
• Fix scale update on transitioning between screens with different DPI.
• Support a short variant (-w) for --working-dir argument.

0.1.8​

• breaking: Introduced a new property in theme called tabs-active-highlight, default color is #ff00ff.
• breaking: Removed breadcrumb navigation.
• breaking: Introduced a new property in theme called bar, default color changed is #1b1a1a.
• breaking: CollapsedTab is now default for all platforms.
• Tab UI got some updates.
• Introduce navigation.hide-if-single property (Ref: #595).
• Performance update: Remove lock dependencies on render calls.
• Performance update: Render repeated styled fragments as one rect.
• Sugarloaf API has changed from Sugar primitives to Content.
• Fix: [editor] overshadow headerless parameters in default config. (Ref: #601)

0.1.7​

Breaking

Editor property have changed from String to allow input arguments as well.

Before:

editor = "vi"

Now:

[editor]
program = "code"
args = ["-w"]

• Fix: editor doesn't handle arguments #550.
• Fix: Weird rendering behaviour on setting padding-x in config #590.
• Upgrade Rust to 1.80.1.

0.1.6​

• Support custom colors on all underlines.
• Support for advaned formatting (squiggly underline?) #370
• Performance improvements!
  • Cache strategy has improved to cover any line that have been previously rendered.
  • Render backgrounds and cursors in one pass.
• Update tokio

0.1.5​

• Fix Bug cell disappearance #579.
• Fix Bug Rendering problem with TUIs using cursor movement control sequences in rio (v0.1.1+) #574.
• Changed default font family to Cascadia Code.
• Changed default width to 800 and default height to 500.

0.1.4​

• Fix Bug Text Rendering Bug #543.
• Fix Abnormal font display and incomplete Navigation content display #554.
• Fix Bug switch tabs doesn't work #536.
• Update Cascadia Code to 2404.23.
• Change Cascadia builtin font from ttf to otf.
• Improvements for mouse selection.
• Performance improvements for background renders for all navigations besides Plain and NativeTab.
• Fix Cursor blinking is triggered by changes in inactive tabs #437.
• Fix key bindings when key is uppercased (alt or shift is inputted along).
• Support to padding-y (ref: #400)

Define y axis padding based on a format [top, bottom], default is [0, 0].

Example:

padding-y = [30, 10]

• Update swash (0.1.18), ab_glyph (0.2.28) and remove double hashmap implementation.

0.1.3​

• Added support to font features (ref: #548 #551)

[fonts]
features = ["ss01", "ss02", "ss03", "ss04", "ss05", "ss06", "ss07", "ss08", "ss09"]

Note: Font features do not have support to live reload on configuration, so to reflect your changes, you will need to close and reopen Rio.

• fix: Wayland - No input after first run #566.
• fix: Mouse pointer location differs from selected text #573.
• fix: IO Safety violation from dropping RawFd (fatal runtime error: IO Safety violation: owned file descriptor already closed).
• Upgrade to Rust 1.80.0.

0.1.2​

• Upgrade wgpu to v22.0.0.
• Restrict of cells width.
• Wayland: update dependencies.
• Wayland: avoid crashing when compositor is misbehaving. (ref: raphamorim/winit 22522c9b37e9734c9a2408fae8d34b2599ff4574).
• Performance upgrades for lines rendered previously.

0.1.1​

• Fix the validation errors whenever a surface is used with the vulkan backend.
• Clean up weak references to texture views and bind groups to prevent memory leaks.
• Fix crashes whenever reading binary files.
• Improvements on font loader (avoid set weight or style in the lookup if isn't defined).
• Fallbacks fonts doesn't trigger alerts anymore.

0.1.0​

Breaking change: Opacity API has changed

• background-opacity has been renamed to opacity. It sets window background opacity.
• Removed foreground-opacity property.
• Removed support to DX11.

Example:

[window]
opacity = 0.8

• Major rewrite on sugarloaf.
  • New rendering architecture.
  • Sugarloaf now uses same render pass for each render.
  • Ignore equal renderers.
  • Compute layout updates only if layout is different.
• BottomTab navigation is now default for Linux and Windows.
• Support to font ligatures.
• Support bluetooth access on MacOs.
• Upgraded wgpu to 0.20.0.
• Support "open here" for Microsoft Windows.
• Fixes on font search for Microsoft Windows.
• Open Url support for MacOS.
• All tabs/window instances now use same font data.
• Disabled line-height configuration in this version (it will be re added eventually).
• Updated ttf-parser and memmap2 on sugarloaf.

Bug fixes​

• closed: #514 Odd background transparency on macOS (Intel)
• closed: #398 Neovim and Helix rendering with line spacing
• closed: #512 Visible lines on transparent background
• closed: #491 Noticeable text update
• closed: #476 Glyphs have very weird rendering
• closed: #422 Background opacity
• closed: #355 Issues with double-width chars
• closed: #259 Sugarloaf: Positioning glyphs
• closed: #167 Tab bar overlaps text
• closed: #328 Some font issues
• closed: #225 Doesn't work with touchscreen
• closed: #307 default offset height is above the bottom position since update
• closed: #392 Box drawing issue with Berkeley Mono on MacOS

0.0.39​

• Minor fix on fixed transparency on backgrounds for Welcome/Dialog.

0.0.38​

• Corrections for transparency and blur for MacOS windows.
• Apply dynamic background logic only for images and keep alpha channel on background.

0.0.37​

• Breaking change: Reduced font size to 16.0.
• Breaking change: Set VI mode trigger with CTRL + SHIFT + SPACE on Windows.
• Update winit to 0.30.0.
• Update rust version to 1.77.2.
• Initial touch support by @androw #226

0.0.36​

• fixes for x11 freeze issue.
• update winit to 0.29.15.
• update wix (toolset that builds Windows Installer) from 4.0.1 to 4.0.4.

0.0.35​

• Bump wayland dependencies: wayland-backend, wayland-client, wayland-cursor and wayland-scanner.
• Refactor: disable cursor blink on selection (ref #437) #441 by @hougesen .
• Rewrite hash logic to use BuildHasher::hash_one.
• Report focus change https://terminalguide.namepad.de/mode/p1004/.
• update rust version to 1.75.0.
• update winit to 0.29.11.

0.0.34​

• use Fowler–Noll–Vo hash function implementation for sugar cache (more efficient for smaller hash keys)
• update winit to 0.29.9

0.0.33​

• Breaking: Removed macos-hide-toolbar-buttons in favor of window.decorations api.
• Fix: Rio failing to draw blur upon launch #379
• Fix: Window transparency does not work on X11 #361
• Added support for path based color automation.
• Added window.decorations property, available options are Enabled, Disabled, Transparent and Buttonless.

0.0.32​

• Fix: font order priority.
• Fix: add default values to keyboard config (#382)

0.0.31​

• Breaking: Configuration performance has moved to renderer.performance.

• Breaking: Configuration disable-renderer-when-unfocused has moved to renderer.disable-renderer-when-unfocused.

• Breaking: Configuration use-kitty-keyboard-protocol has moved to keyboard.use-kitty-keyboard-protocol.

• Introduction of new configuration property called keyboard.

[keyboard]
use-kitty-keyboard-protocol = false
disable-ctlseqs-alt = false

• Introduction of keyboard.disable-ctlseqs-alt: Disable ctlseqs with ALT keys. It is useful for example if you would like Rio to replicate Terminal.app, since it does not deal with ctlseqs with ALT keys

• Introduction of new configuration property called renderer.

[renderer]
performance = "High"
disable-renderer-when-unfocused = false
backend = "Automatic"

# backend options:
# Automatic: Leave Sugarloaf/WGPU to decide
# GL: Supported on Linux/Android, and Windows and macOS/iOS via ANGLE
# Vulkan: Supported on Windows, Linux/Android
# DX12: Supported on Windows 10
# DX11: Supported on Windows 7+
# Metal: Supported on macOS/iOS

• Fix: update padding top on config change #378 by @hougesen
• Fixed bug where color automation did not work on Linux because of line ending character.
• Fix: Control + Up/Down don't works as expected on neovim #371
• Fix: remove duplicate kitty backspace keybinds #375 by @hougesen
• Fix: Kitty-keyboard-protocol causes Backspace to delete 2 characters. #344 by @hougesen

0.0.30​

• Fix regression with color ansi when transparency is off.
• Breaking: Config navigation.macos-hide-window-buttons has moved to window.macos-hide-toolbar-buttons.
• Breaking: Config property padding-x has been updated from 5.0 to 0.0 on MacOS.

0.0.29​

• Fix compiled binary shows nothing inside the app window #366.
• Fix command key + left and right strange behavior #359.
• New scroll API: Scroll calculation for canonical mode will be based on (accumulated scroll * multiplier / divider) so if you want quicker scroll, keep increasing the multiplier if you want to reduce you increase the divider. Can use both properties also to find the best scroll for you:

[scroll]
multiplier = 3.0
divider = 1.0

• Corrections for TMUX scroll calculations.

0.0.28​

• Breaking: Settings UI has been removed and editor property has been added.
• Breaking: default padding-x for MacOS has moved from 10.0 to 5.0.
• Breaking: Background API has moved to Window

Example:

[window]
width = 600
height = 400
mode = "Windowed"
foreground-opacity = 1.0
background-opacity = 1.0

Using image as background:

[window.background-image]
path = "/Users/rapha/Desktop/eastward.jpg"
width = 200.0
height = 200.0
x = 0.0
y = 0.0

• Breaking: MacOS default navigation mode will become NativeTab.
• Support for blur background.
• Support opacity for foreground and background.
• Cursor hide feature is now behind configuration hide-cursor-when-typing.
• Confirm before quite (it can be disabled through configuration confirm-before-quit).
• Close the last tab in MacOS when using command + w (Ref: #296)
• OSC 8 (Hyperlinks).
• Fix current path on new tab is not working when using Native Tab (Ref #323).
• Change POLLING_TIMEOUT for configuration update from 1s to 2s.
• Update .icns file with more format and add new icon (Ref: #329) by @nix6839.
• Update .ico files with more resolution and add new icon (Ref: #329) by @nix6839.

0.0.27​

• Activate the hyperlink check whenever a modifier is changed (alt for windows/linux/bsd and command for macos).
• Fix Error when Double click on terminal side (Ref #316).

0.0.26​

• Upgrade winit to 0.29.3.
• Support for Run actions key bindings for Microsoft Windows.
• Hyperlink support (Ref #60)

0.0.25​

• Upgrade wgpu to 0.18.0.
• Desktop OpenGL 3.3+ Support on Windows through WebGPU.
• Display the shell name on the tab title for MacOS Native Tab (Ref #311 by @eduronqui).
• Fix VI cursor disappearing whenever perform a scroll..
• Fix flagged dimmed colors (cases where it does not comes from rgb index).
• Fix MacOS fullscreen empty space on margin top.
• Upgrade winit to 0.29.2.

0.0.24​

• Improvements on selection text for scale factor >= 2.0.
• Improvements on cursor sugar creation, dropped unnecessary usage of clone.
• Colors/Themes got a new property called vi-cursor, you can specify any color you wish for VI Cursor.
• Alacritty's VI Mode.

0.0.23​

Breaking changes​

• navigation.mode = "Plain" now only shutdowns the key bindings related to tab creation/manipulation.
• ignore-selection-fg-color has been renamed to ignore-selection-foreground-color.
• Kitty keyboard protocol has been disabled by default in this version, for enable it you need to use use-kitty-keyboard-protocol = true.
• CollapsedTab is not based on reverse order anymore.
• Actions SelectTab1, SelectTab2, ..., SelectTab9 have been removed in favor of the new select tab API:

[bindings]
keys = [
    { key = "1", with = "super", action = "SelectTab(0)" },
    { key = "2", with = "super", action = "SelectTab(1)" },
    { key = "3", with = "super", action = "SelectTab(2)" }
]

• Actions ScrollLineUp and ScrollLineDown have been removed in favor of the new Scroll API:

[bindings]
keys = [
    # Scroll up 8 lines
    { key = "up", with = "super", action = "Scroll(8)" },
    # Scroll down 5 lines
    { key = "down", with = "super", action = "Scroll(-5)" }
]

Other changes​

• Rendering performance small improvements towards to Sugar text for regular font, dropped in redundancy processing (avg 68ms to 22ms with tests using 155x94 without repetition like vim Cargo.lock).
• Rendering performance small improvements towards to Sugar rect calculation, dropped in redundancy processing. Now Sugarloaf computes better Rects duplication in a line. It gains significant performance for large screens (avg ~12ms).
• Fix Backspace behaviour misplace on Windows (Ref https://github.com/raphamorim/rio/issues/220).
• ClearHistory key binding is available to use per configuration file.
• Introduce Alacritty's VI Mode (Ref https://github.com/raphamorim/rio/issues/186).
• Implement ClearSelection key binding action.
• Fix Cursor shape isn't restored (Ref https://github.com/raphamorim/rio/issues/279).
• Fix color automation for breadcrumb mode (Ref https://github.com/raphamorim/rio/issues/251).
• Fix text copy (OSC 52) is broken (tmux, zellij) (Ref https://github.com/raphamorim/rio/issues/276).
• Fix lines calculation for different fonts.
• Fix bug whenever is not closing terminal for non native tabs (Ref https://github.com/raphamorim/rio/issues/255).
• Removal of hide cursor functionality when start to type for all platforms besides Apple MacOS.
• Support to new scroll action API key binding.
• Support to new select tab action API key binding.
• Support to execute programs as actions for key bindings:

[bindings]
keys = [
    { key = "p", with = "super", action = "Run(code)" },
    { key = "o", with = "super", action = "Run(sublime ~/.config/rio/config.toml)" }
]

• Upgrade rust to 1.73.0 by @igorvieira.

0.0.22​

• Now you can add extra fonts to load:

[fonts]
extras = [{ family = "Microsoft JhengHei" }]

• Added ScrollLineUp, ScrollLineDown, ScrollHalfPageUp, ScrollHalfPageDown, ScrollToTopand ScrollToBottom to bindings.
• Fix japanese characters on Microsoft Windows (Ref: https://github.com/raphamorim/rio/issues/266).
• Navigation fonts now use the CascadiaCode built-in font and cannot be changed.
• Proper select adapter with is_srgb filter check.
• Switched to queue rendering instead of use staging_belt.
• Fixed leaks whenever buffer dropped map callbacks.
• Forked and embedded glyph-brush project to sugarloaf. Glyph-brush was originally created @alexheretic and is licensed under Apache-2.0 license.
• Upgrade wgpu to 0.17.1.

0.0.21​

• Hide other applications in MacOS #262 by @sonbui00.
• Implemented working-dir parameter to cli https://github.com/raphamorim/rio/issues/258.
• Remove legacy icns icons from bundle.

0.0.20​

• Fix retrieve foreground process name to tabs.
• Fix cursor disappearing in the first tab whenever a new tab is created with NativeTab.
• Fix settings for NativeTabs.
• New docs.
• Removal of RIO_CONFIG environment variable.
• Add ToggleFullscreen Action #229 (Ref: https://github.com/raphamorim/rio/pull/249)
• fix: Command + H can't hide rio on macOS (Ref: https://github.com/raphamorim/rio/pull/244).
• Added fontconfig to font loader.
• New Rio terminal logo.
• Update Rust to 1.72.1 (Ref: https://github.com/raphamorim/rio/pull/238).
• Enable CPU-specific optimizations on aarch64-apple-darwin (Ref: https://github.com/raphamorim/rio/pull/235).
• Use release profile with optimization level as 3 (Ref: https://github.com/raphamorim/rio/pull/236).
• Use fixed dependency versions in sugarloaf
• Added split support along with the following actions SplitVertically, SplitHorizontally and ClosePane (support to split is still not available).

0.0.19​

Breaking change

Configuration properties: window_height, window_width and window_opacity has been moved to a new window/background API:

# Window configuration
#
# • width - define the initial window width.
#   Default: 600
#
# • height - define the initial window height.
#   Default: 400
#
# • mode - define how the window will be created
#     - "Windowed" (default) is based on width and height
#     - "Maximized" window is created with maximized
#     - "Fullscreen" window is created with fullscreen
#
[window]
width = 600
height = 400
mode = "Windowed"

# Background configuration
#
# • opacity - changes the background transparency state
#   Default: 1.0
#
# • mode - defines background mode between "Color" and "Image"
#   Default: Color
#
# • image - Set an image as background
#   Default: None
#
[background]
mode = "Image"
opacity = 1.0
[background.image]
path = "/Users/rapha/Desktop/eastward.jpg"
width = 200.0
height = 200.0
x = 0.0

• Fix for retrieving shell environment variable when running inside of Flatpak sandbox (Ref: https://github.com/raphamorim/rio/issues/198).
• Rio terminal is now also available in crates.io: https://crates.io/crates/rioterm .
• Added navigation.mode = "Plain", it basically disables all platform key bindings for tabs, windows and panels creation (Ref https://github.com/raphamorim/rio/issues/213).
• Support for blinking cursor (Ref: https://github.com/raphamorim/rio/issues/137) (this option is not enabled by default).
• Migrated font-kit to a custom font loader.
• Support to MacOS tile window positioning feature (left or right).
• Added support to MacOS display native top bar items.
• Support to adaptive theme (theme selection based on user system theme variant dark or light).
• Implemented ScrollPageUp, ScrollPageDown, ScrollHalfPageUp, ScrollHalfPageDown, ScrollToTop, ScrollToBottom, ScrollLineUp, ScrollLineDown (Ref: https://github.com/raphamorim/rio/issues/206).
• Support to fonts.family (it overwrites regular, bold, bold-italic and italic font families).
• Added a welcome screen UI.
• Added a settings UI.
• Exposes RIO_CONFIG environment variable that contains the path of the configuration.
• Rio creates a configuration file with all defaults if does not exist.
• Added OpenConfigEditor key binding for all platforms.
• Configuration property editor was removed.
• Created Assistant, Rio terminal UI for display error (Ref: https://github.com/raphamorim/rio/issues/168).
• Fix 'Backspace' keypress triggers Ctrl+h keybinding in Zellij instead of deleting character. (Ref: https://github.com/raphamorim/rio/issues/197).
• Implemented TERM_PROGRAM and TERM_PROGRAM_VERSION (Ref: https://github.com/raphamorim/rio/issues/200).
• Whenever native tabs is on disable macos deadzone logic.

0.0.18​

• Upgraded to Rust 1.72.0.
• Fix delete key inputs square character.
• Fix Breadcrumb navigation crash.

0.0.17​

Breaking changes​

• Configuration font does not work anymore, a new configuration API of font selection has been introduced.

[fonts]
size = 18

[fonts.regular]
family = "cascadiamono"
style = "normal"
weight = 400

[fonts.bold]
family = "cascadiamono"
style = "normal"
weight = 800

[fonts.italic]
family = "cascadiamono"
style = "italic"
weight = 400

[fonts.bold-italic]
family = "cascadiamono"
style = "italic"
weight = 800

• Action TabSwitchNext and TabSwitchPrev has been renamed to SelectNextTab and SelectPrevTab.

Rest of 0.0.17 changelog​

• Support to NativeTab (MacOS only).
• Support for kitty's keyboard protocol (CSI u). Ref: https://sw.kovidgoyal.net/kitty/keyboard-protocol/
• Added new actions for tab selection: SelectTab1, SelectTab2, SelectTab3, SelectTab4, SelectTab5, SelectTab6, SelectTab7, SelectTab8, SelectTab9, SelectLastTab.
• Support lowercased action and fix overwrite for actions in custom key bindings.
• Added action Minimize for minimize Rio terminal window.
• Added action ClearHistory for clear terminal saved history.
• Added action ReceiveChar for custom key bindings.
• New default key bindings for Linux and Windows so that conflicts with readline key bindings are removed.
• Winit Version 0.29.1-beta.
• Allow paste with the middle mouse of the button (fixes https://github.com/raphamorim/rio/issues/123).
• Support startup notify protocol to raise initial window on Wayland/X11.
• Fix Double-tap by touchpad on the titlebar doesn't maximize/unmaximize the window in GNOME 44, Wayland.

0.0.16​

• Fix tab/breadcrumb bug introduced in 0.0.15
• Introduce new configuration property: navigation.macos-hide-window-button.

0.0.15​

• Introduce configurable navigation with the following options: CollapsedTab (default), Breadcrumb, TopTab and BottomTab.

An example of configuration:

[navigation]
mode = "BottomTab"
use-current-path = true
clickable = false

• Performance improvements with Sugarloaf de-duplication of input data.
  • Before: ~253.5µs.
  • Now: ~51.5µs.
• Introduce navigation.use-current-path which sets if a tab/breacrumb should be open from the current context path.
• Fix rendering unicode with 1 width glyphs (fix #160).
• Increased max tabs from 9 to 20.
• Default colors selection-foreground and selection-background has changed.
• Default colors tab and tab-active has changed.

0.0.14​

• Implementation of custom key bindings (#117).
• Fix .deb packing in GH Actions.
• Fix key binding for switch tab next (MacOS only).
• Fix scroll when copying text outside of offset.
• Fix copy key bindings.

0.0.13​

• Fix Fuzzy Finder issue (#132).
• Introduce Copa (Alacritty's VTE forked version to introduce new sequences/instructions in next versions).
• Upgraded Winit to 0.29.0-beta.0.
• Support for keybindings with dead keys.
• Back/Forward mouse buttons support in bindings.
• Fix unconditional query of xdg-portal settings on Wayland.
• Fix Maximized startup mode not filling the screen properly on GNOME Wayland.
• Fix Default Vi key bindings for Last/First actions not working on X11/Wayland.
• Set padding-x to 0 for non-macos.
• Set app_id/WM_CLASS property on Wayland/X11.

0.0.12​

• Strip binary is on for release builds.
• Each paste or key binding that has writing leads to clear selection and scroll bottom.
• Fixed over-rendering when scrolling.
• Fix selection.
• Support to copy using VIM.
• Fix for MacOS deadzone changing cursor to draggable on window buttons.
• Fix for scroll using tmux.

0.0.11​

• Fix for font styles using CachedSugar.

0.0.10​

• Major refactor of Sugarloaf.
  • Performance improvements around 80-110%.
  • Introduced CachedSugar.
  • Usage of PixelScale.
  • Line-height support.
• Open new tab using the current tab directory.
• Fix some symbols break the horizontal and vertical alignment of lines (ref #148).
• Fix font size configuration is confusing (ref #139).
• Fix Glyph not rendered in prompt (ref: #135).
• Use fork by default in context tests.
• Updated terminfo.
• Increased default font size to 18.
• Move to next and prev tab using keybindings.
• Setting editor by keybindings and new property called editor in configuration file.
• Rio creates .deb packages (canary and release).
• Binary size optimization (ref: #152) by [@OlshaMB]

0.0.9​

• Created "rio" terminfo.
• Breaking changes for configuration file regarding Advanced. The configuration Advanced has moved to root level and disable-render-when-unfocused renamed to disable-unfocused-render.

before

theme = "dracula"

[advanced]
disable-render-when-unfocused = true

now

theme = "dracula"
disable-unfocused-render = true

• Support to spawn and fork processes, spawn has became default. Spawn increases Rio compatibility in a broad range, like old MacOS versions (older or equal to Big Sur). However, If you want to use Rio terminal to fork processes instead of spawning processes, enable use-fork in the configuration file:

use-fork = true

• Introduced RIO_LOG_LEVEL variable usage. (e.g: RIO_LOG_LEVEL=debug rio -e "echo 1")
• Increased max tabs from 6 to 9.
• Fix Incorrect cursor position when using multi-byte characters (Ref: #127)
• Fix bug "black screen with nearly zero interactivity" and new tab hanging.
• Fix cursor disappearing after resize.
• Introduction of shell and working_dir in configuration file.
• Multi window support #97.
• Corrections on select and scroll experience (it was using wrongly font-bound for line calculation).
• Add selection color to the theme config (closed #125).
• Implemented Inverse (fix #92).
• Proper choose formats that matches with TextureFormat::is_srgb (it fixed the Vulkan driver, related #122).
• Corcovado: Filter windows crate dependency to only Windows targets (related: #119).
• Teletypewriter: Fixes for musl as target_env (related: #119).
• FreeBSD support, implementation by yurivict (Commit, Ref: #115)

0.0.8​

• Added generation of .msi and .exe files to the release pipeline (stable and canary).
• Support to Microsoft Windows.
• Ability to in|decrease font size using keyboard shortcut during session (ref: #109)
• Inverted Canary and Stable icons.
• ANSI mouse reports (e.g: scroll and click working on VIM).
• Scroll and apply selection.
• Semantic and line selection.
• Rio is available in Homebrew casks (ref github.com/Homebrew/homebrew-cask/pull/149824).
• Rio stable versions are notarized now.
• Migration of mio, mio-extras, mio-signal-hook to Corcovado.
• Changed default black color to #4c4345.
• Fix mouse position for when selecting text.

0.0.7​

• Breaking changes for configuration file regarding Style property.

before:

performance = "High"
[style]
font-size = 18
theme = "lucario"

now:

performance = "High"
theme = "lucario"
font-size = 18

• Fix Background color not entirely set on vim #88
• Scroll now works for x11 and wayland.
• No longer renders to macos and x11 windows that are fully occluded / not directly visible.
• Introduced window-opacity config property for WebAssembly and Wayland builds.
• Add permissions instructions to Rio macos builds (Fix #99).
• Fixes for x11 and wayland rendering (Related: #98 and #100).
• Performance fixes (Related: #101).
• Sugarloaf WebAssembly support.
• Fixed resize for all contexts: removed the glitch when resizing and switching between tabs.
• Fixed cursor inconsistencies #95.
• Added command line interface support (--help, --version, -e and --command).
• Added a fallback for WPGU request device operation: downlevel limits, which will allow the code to run on all possible hardware.
• Added padding-x to configuration.
• Reload automatically when the configuration file is changed (#69).
• Fix Ctrl+D.
• Fix exit command not closing the app (#87).
• Changed default light-black color.

0.0.6​

• Fix: support to clipboard in linux by @joseemds.
• Font style for custom fonts by @OlshaMB (closed #80 and #81)
• Text styles Underline and Strikethrough (closed #79).
• Update default colors for tabs/tabs-active.
• Tabs support.
• Fix rendering tab and hidden chars by replacing to space by @niuez, (closed #56).
• Block cursor hover a character and still allow it to be visible.
• Support to caret Beam and Underline cursor #67 by @niuez.
• Fix panics if custom font is not found #68.
• MacOs ignore alt key in cntrlseq (same behavior as Terminal.app, Hyper, iTerm and etecetera).

0.0.5​

• Fix ctlseqs modifiers for bindings.
• Add RioEvent::ColorRequest events to write color updates on pty.
• Fix to render specific 24bit colors (#66) by @niuez.
• Cross build for arm64 and x86
• Bold and Italic support (https://github.com/raphamorim/rio/issues/33).
• Theme support (eae39bc81b5b561882b7a37b2c03896633276c27)
• Fix font-size dependency for serialization (f278102)
• Fix cursor visibility on VI mode and scroll (https://github.com/raphamorim/rio/issues/51)
• Performance fixes for rendering from teletypewriter updates.
• Fix scale issues for 1.0 scale factor or using monitor with different scale factor. (https://github.com/raphamorim/rio/issues/50)
• Improve make pack-osx-arm and make pack-osx-x86 to only contain Rio.app file. (https://github.com/raphamorim/rio/issues/54)

0.0.4​

• Fix CPU large usage when scrolling.
• Task scheduler.
• Copy feature.
• Selection feature (selection doesn't work when scrolling yet).
• Change default cursor icon for Text (winit::window::CursorIcon).
• Scroll bottom when display offset is different than zero.
• Fix for user interaction "close Rio terminal" using UI interface (ExitWithCode(0)).
• Hide cursor when typing and make it visible again with scroll and cursor interactions.
• Implementation of paste files to string path.

0.0.3​

• Added Input Method Engine (IME) support. Note: only works for preedit with single character now, which means that still need to fix for other keyboards as Japanese, Chinese [...].
• Common Keybindings and keybindings for MacOS.
• Allow to configure option-as-alt for Winit on MacOs. Issue originally bought by Alacritty on Winit (https://github.com/rust-windowing/winit/issues/768).
• Allow to configure environment variables through config file.
• Stabilization of Sugarloaf render on emojis, symbols and unicode.

0.0.2​

• log-level as configurable (DEBUG, INFO, TRACE, ERROR, WARN and OFF). OFF by default.
• Introduction of rendering engine called Sugarloaf.
• System font loader (tested and implemented for MacOs).
• Font loader with not native emoji font (emojis aren't stable yet).
• Rect renderer based on provided color (text background), stabilized for monospaced fonts.

0.0.1​

• Basic move/goto functionalities.
• Initial definition of Rio default colors.
• Set and reset color by ANSI parser.
• Clear/Tabs functionalities.
• Grid introduction.
• Desktop delta scroll (up and down, without scrollbar UI component).
• Teletypewriter 2.0.0 usage for macos and linux.
• Resize support.
• $SHELL login on macos, by default: /bin/zsh --login (if $SHELL is settled as other could as run /bin/bash --login, /bin/fish --login ...).
• Cursor initial support (without VI mode).