| 1 | //! Terminal-native underwater field for the Codewhale transcript. |
| 2 | //! |
| 3 | //! The field is atmosphere, never content: ordinary shell cells share its |
| 4 | //! water column while semantic surfaces such as selections, errors, and code |
| 5 | //! keep their own backgrounds. It belongs to the `underwater` theme alone |
| 6 | //! (`ThemeId::Underwater`); every other theme leaves the terminal's ground |
| 7 | //! untouched. Motion inside the field remains governed separately by |
| 8 | //! `low_motion`/`fancy_animations`. |
| 9 | |
| 10 | use ratatui::{buffer::Buffer, layout::Rect, style::Color}; |
| 11 | |
| 12 | use crate::tui::underwater::ShellPhase; |
| 13 | use codewhale_palette::UiTheme; |
| 14 | |
| 15 | /// Minimum empty-water size that earns decorative ambient life when the |
| 16 | /// underwater theme is selected. Below this, content and controls own |
| 17 | /// every cell. Shared by the renderer and idle animation scheduler so redraws |
| 18 | /// are never scheduled for invisible life. |
| 19 | pub const AMBIENT_MIN_WIDTH: u16 = 40; |
| 20 | pub const AMBIENT_MIN_HEIGHT: u16 = 10; |
| 21 | |
| 22 | /// Ambient-life ink pair, independent of the Deepsea ramp and shaped by what |
| 23 | /// the agent is doing so the marks themselves carry the state at a glance: |
| 24 | /// reasoning dims toward the deep, tool work brightens like a faster current, |
| 25 | /// and a sub-agent pod swims in seafoam — the hue reserved for orchestration. |
| 26 | #[must_use] |
| 27 | pub fn ambient_inks_for_activity( |
| 28 | theme: &UiTheme, |
| 29 | activity: crate::tui::ambient_life::AmbientActivity, |
| 30 | ) -> (Color, Color) { |
| 31 | use crate::tui::ambient_life::AmbientActivity; |
| 32 | let sky = match activity { |
| 33 | AmbientActivity::Subagents => rgb(theme.accent_secondary).unwrap_or((79, 209, 197)), |
| 34 | _ => rgb(theme.info).unwrap_or((106, 174, 242)), |
| 35 | }; |
| 36 | // `mix(sky, base, t)`: larger `t` sits closer to the background — dimmer. |
| 37 | let (toward_base_a, toward_base_b) = match activity { |
| 38 | AmbientActivity::Reasoning => (0.58, 0.44), |
| 39 | AmbientActivity::Reading => (0.50, 0.36), |
| 40 | AmbientActivity::Tools => (0.30, 0.18), |
| 41 | AmbientActivity::Subagents => (0.34, 0.22), |
| 42 | AmbientActivity::Verifying | AmbientActivity::Baseline => (0.42, 0.28), |
| 43 | }; |
| 44 | // Only the underwater theme owns a painted base column; everywhere else |
| 45 | // the terminal's own ground (Color::Reset) is the base and the inks fall |
| 46 | // back to the theme's info lane. |
| 47 | let mix_base = rgb(theme.surface_bg) |
| 48 | .or_else(|| OceanRamp::for_theme(theme).and_then(|ramp| rgb(ramp.middle))); |
| 49 | match mix_base { |
| 50 | Some(base) => ( |
| 51 | color(mix(sky, base, toward_base_a)), |
| 52 | color(mix(sky, base, toward_base_b)), |
| 53 | ), |
| 54 | None => (theme.info, theme.info), |
| 55 | } |
| 56 | } |
| 57 | |
| 58 | /// Length of the completion breath (the column's settle flourish), ms. |
| 59 | pub const COMPLETION_BREATH_MS: u128 = 800; |
| 60 | |
| 61 | /// Extra ms after the breath during which ambient life eases out of view. |
| 62 | pub const SETTLE_MS: u128 = 600; |
| 63 | pub(crate) const COMPLETION_SETTLE_MS: u128 = COMPLETION_BREATH_MS + SETTLE_MS; |
| 64 | |
| 65 | /// Ms over which animated life ramps in when a working phase begins. |
| 66 | pub const RAMP_MS: u128 = 450; |
| 67 | |
| 68 | /// Smoothstep easing: 0 at t=0, 1 at t=1, zero velocity at both ends. |
| 69 | #[must_use] |
| 70 | pub fn smoothstep(t: f32) -> f32 { |
| 71 | let t = t.clamp(0.0, 1.0); |
| 72 | t * t * (3.0 - 2.0 * t) |
| 73 | } |
| 74 | |
| 75 | /// Life presence (0..=1) as a pure function of the monotonic clocks. There is |
| 76 | /// deliberately NO per-frame mutable state here: the same inputs always yield |
| 77 | /// the same output, which keeps ambient-life renders deterministic. |
| 78 | /// |
| 79 | /// Rules: |
| 80 | /// - A turn just ended (`completion_elapsed_ms` within the breath) holds full |
| 81 | /// presence so ambient life keeps swimming through the settle flourish. |
| 82 | /// - After the breath, presence eases out over [`SETTLE_MS`] so the water |
| 83 | /// settles instead of snapping from animated to frozen. |
| 84 | /// - Browsing history or the pristine empty state is user-driven: full |
| 85 | /// presence immediately. |
| 86 | /// - A Working/Verifying phase ramps in from `turn_elapsed_ms` over |
| 87 | /// [`RAMP_MS`], giving bursty fast streams a calm, bounded onset. |
| 88 | /// - Everything else is fully static. |
| 89 | #[must_use] |
| 90 | pub fn life_presence( |
| 91 | completion_elapsed_ms: Option<u128>, |
| 92 | turn_elapsed_ms: Option<u128>, |
| 93 | animated: bool, |
| 94 | browsing_history: bool, |
| 95 | empty_state: bool, |
| 96 | ) -> f32 { |
| 97 | if let Some(elapsed) = completion_elapsed_ms { |
| 98 | if elapsed < COMPLETION_BREATH_MS { |
| 99 | return 1.0; |
| 100 | } |
| 101 | let t = (elapsed - COMPLETION_BREATH_MS) as f32 / SETTLE_MS as f32; |
| 102 | return 1.0 - smoothstep(t); |
| 103 | } |
| 104 | if !animated { |
| 105 | return 0.0; |
| 106 | } |
| 107 | if browsing_history || empty_state { |
| 108 | return 1.0; |
| 109 | } |
| 110 | match turn_elapsed_ms { |
| 111 | Some(elapsed) => smoothstep(elapsed as f32 / RAMP_MS as f32), |
| 112 | None => 1.0, |
| 113 | } |
| 114 | } |
| 115 | |
| 116 | #[derive(Debug, Clone, Copy, PartialEq, Eq)] |
| 117 | pub struct OceanRamp { |
| 118 | pub surface: Color, |
| 119 | pub middle: Color, |
| 120 | pub deep: Color, |
| 121 | pub ambient: Color, |
| 122 | /// Tint for phases that are blocked on the user (Waiting / Approval). |
| 123 | /// The whole water field warms toward this so "needs you" is legible |
| 124 | /// from across the room, not only in the phase strip. |
| 125 | pub attention: Color, |
| 126 | /// Tint for the Failed outcome: a steady cast, not a pulse — it reports, |
| 127 | /// it does not ask. |
| 128 | pub failure: Color, |
| 129 | } |
| 130 | |
| 131 | /// One continuous water column shared by every shell band in a frame. |
| 132 | /// |
| 133 | /// Individual widgets still own their foreground and semantic surfaces, but |
| 134 | /// ordinary shell backgrounds sample this column with their absolute row. |
| 135 | /// That keeps the header, work strip, transcript, phase line, and composer |
| 136 | /// from each restarting the same miniature gradient. |
| 137 | #[derive(Debug, Clone, Copy, PartialEq, Eq)] |
| 138 | pub struct OceanColumn { |
| 139 | ramp: OceanRamp, |
| 140 | top: u16, |
| 141 | height: u16, |
| 142 | elapsed_ms: u128, |
| 143 | completion_elapsed_ms: Option<u128>, |
| 144 | phase: ShellPhase, |
| 145 | animated: bool, |
| 146 | /// Fixed-point (0..=1000) life presence; keeps `Eq` derivable. |
| 147 | presence: u16, |
| 148 | context_percent: u8, |
| 149 | } |
| 150 | |
| 151 | #[derive(Debug, Clone, Copy, PartialEq, Eq)] |
| 152 | struct OceanRampCacheIdentity { |
| 153 | ramp: OceanRamp, |
| 154 | top: u16, |
| 155 | height: u16, |
| 156 | phase_tag: u8, |
| 157 | animated: bool, |
| 158 | completion_active: bool, |
| 159 | presence: u16, |
| 160 | context_percent: u8, |
| 161 | } |
| 162 | |
| 163 | impl OceanRampCacheIdentity { |
| 164 | fn fingerprint(self) -> u64 { |
| 165 | const OFFSET_BASIS: u64 = 0xcbf2_9ce4_8422_2325; |
| 166 | const PRIME: u64 = 0x0000_0100_0000_01b3; |
| 167 | |
| 168 | [ |
| 169 | color_cache_code(self.ramp.surface), |
| 170 | color_cache_code(self.ramp.middle), |
| 171 | color_cache_code(self.ramp.deep), |
| 172 | color_cache_code(self.ramp.ambient), |
| 173 | color_cache_code(self.ramp.attention), |
| 174 | color_cache_code(self.ramp.failure), |
| 175 | u32::from(self.top), |
| 176 | u32::from(self.height), |
| 177 | u32::from(self.phase_tag), |
| 178 | u32::from(self.animated), |
| 179 | u32::from(self.completion_active), |
| 180 | u32::from(self.presence), |
| 181 | u32::from(self.context_percent), |
| 182 | ] |
| 183 | .into_iter() |
| 184 | .flat_map(u32::to_le_bytes) |
| 185 | .fold(OFFSET_BASIS, |state, byte| { |
| 186 | (state ^ u64::from(byte)).wrapping_mul(PRIME) |
| 187 | }) |
| 188 | } |
| 189 | } |
| 190 | |
| 191 | fn color_cache_code(value: Color) -> u32 { |
| 192 | match value { |
| 193 | Color::Reset => 0, |
| 194 | Color::Black => 1, |
| 195 | Color::Red => 2, |
| 196 | Color::Green => 3, |
| 197 | Color::Yellow => 4, |
| 198 | Color::Blue => 5, |
| 199 | Color::Magenta => 6, |
| 200 | Color::Cyan => 7, |
| 201 | Color::Gray => 8, |
| 202 | Color::DarkGray => 9, |
| 203 | Color::LightRed => 10, |
| 204 | Color::LightGreen => 11, |
| 205 | Color::LightYellow => 12, |
| 206 | Color::LightBlue => 13, |
| 207 | Color::LightMagenta => 14, |
| 208 | Color::LightCyan => 15, |
| 209 | Color::White => 16, |
| 210 | Color::Indexed(index) => 0x0100_0000 | u32::from(index), |
| 211 | Color::Rgb(red, green, blue) => 0x0200_0000 | u32::from_be_bytes([0, red, green, blue]), |
| 212 | } |
| 213 | } |
| 214 | |
| 215 | impl OceanColumn { |
| 216 | // Eight args mirroring the eight column fields; a params struct would |
| 217 | // only rename the call sites without removing a single decision. |
| 218 | #[allow(clippy::too_many_arguments)] |
| 219 | #[must_use] |
| 220 | pub fn new( |
| 221 | ramp: OceanRamp, |
| 222 | viewport: Rect, |
| 223 | elapsed_ms: u128, |
| 224 | completion_elapsed_ms: Option<u128>, |
| 225 | phase: ShellPhase, |
| 226 | animated: bool, |
| 227 | presence: u16, |
| 228 | context_percent: u8, |
| 229 | ) -> Self { |
| 230 | Self { |
| 231 | ramp, |
| 232 | top: viewport.y, |
| 233 | height: viewport.height.max(1), |
| 234 | elapsed_ms, |
| 235 | completion_elapsed_ms, |
| 236 | phase, |
| 237 | animated, |
| 238 | presence, |
| 239 | context_percent: context_percent.min(100), |
| 240 | } |
| 241 | } |
| 242 | |
| 243 | #[must_use] |
| 244 | pub fn color_at_y(self, y: u16) -> Color { |
| 245 | let row = y.saturating_sub(self.top).min(self.height - 1); |
| 246 | if let Some(elapsed) = self |
| 247 | .completion_elapsed_ms |
| 248 | .filter(|elapsed| *elapsed < COMPLETION_BREATH_MS) |
| 249 | { |
| 250 | self.ramp |
| 251 | .color_at_completion_context(row, self.height, elapsed, self.context_percent) |
| 252 | } else { |
| 253 | // Attention states tint the water itself, independent of life |
| 254 | // presence: a session blocked on approval or ended in failure |
| 255 | // must stay legible from across the room even after ambient life |
| 256 | // has fully settled, and under reduced motion (where the tint is |
| 257 | // steady instead of breathing). |
| 258 | if matches!( |
| 259 | self.phase, |
| 260 | ShellPhase::Waiting | ShellPhase::Approval | ShellPhase::Failed |
| 261 | ) { |
| 262 | return self.ramp.color_at_attention_context( |
| 263 | row, |
| 264 | self.height, |
| 265 | self.phase, |
| 266 | self.context_percent, |
| 267 | ); |
| 268 | } |
| 269 | // Ease between the static gradient and the phase treatment by |
| 270 | // life presence, so mood/activity changes blend instead of snap. |
| 271 | let static_color = self |
| 272 | .ramp |
| 273 | .color_at_context(row, self.height, self.context_percent); |
| 274 | if self.animated || self.presence > 0 { |
| 275 | let phase_color = self.ramp.color_at_phase_context( |
| 276 | row, |
| 277 | self.height, |
| 278 | self.elapsed_ms, |
| 279 | self.phase, |
| 280 | self.context_percent, |
| 281 | ); |
| 282 | mix_colors(static_color, phase_color, self.presence_f32()) |
| 283 | } else { |
| 284 | static_color |
| 285 | } |
| 286 | } |
| 287 | } |
| 288 | |
| 289 | /// Life presence as a 0..=1 fraction of the fixed-point field. |
| 290 | #[must_use] |
| 291 | fn presence_f32(self) -> f32 { |
| 292 | (f32::from(self.presence) / 1000.0).clamp(0.0, 1.0) |
| 293 | } |
| 294 | |
| 295 | /// Elapsed milliseconds of the completion breath, when active. Ambient |
| 296 | /// life uses this to time the rare whale cameo on successful turns. |
| 297 | #[must_use] |
| 298 | pub fn completion_elapsed_ms(self) -> Option<u128> { |
| 299 | self.completion_elapsed_ms |
| 300 | } |
| 301 | |
| 302 | /// Compact phase discriminator for [`crate::tui::ambient_life::OceanRampCache`]. |
| 303 | #[must_use] |
| 304 | pub fn phase_tag(self) -> u8 { |
| 305 | match self.phase { |
| 306 | ShellPhase::Idle => 0, |
| 307 | ShellPhase::Typing => 1, |
| 308 | ShellPhase::Working => 2, |
| 309 | ShellPhase::Verifying => 3, |
| 310 | ShellPhase::Waiting => 4, |
| 311 | ShellPhase::Approval => 5, |
| 312 | ShellPhase::Done => 6, |
| 313 | ShellPhase::Failed => 7, |
| 314 | } |
| 315 | } |
| 316 | |
| 317 | fn ramp_cache_identity(self) -> OceanRampCacheIdentity { |
| 318 | OceanRampCacheIdentity { |
| 319 | ramp: self.ramp, |
| 320 | top: self.top, |
| 321 | height: self.height, |
| 322 | phase_tag: self.phase_tag(), |
| 323 | animated: self.animated, |
| 324 | completion_active: self |
| 325 | .completion_elapsed_ms |
| 326 | .is_some_and(|elapsed| elapsed < COMPLETION_BREATH_MS), |
| 327 | presence: self.presence, |
| 328 | context_percent: self.context_percent, |
| 329 | } |
| 330 | } |
| 331 | |
| 332 | /// Deterministic fingerprint of every column input owned by the ramp cache. |
| 333 | /// Actual colors are encoded explicitly; this never depends on randomized |
| 334 | /// hashing or debug formatting. |
| 335 | #[must_use] |
| 336 | pub fn ramp_fingerprint(self) -> u64 { |
| 337 | self.ramp_cache_identity().fingerprint() |
| 338 | } |
| 339 | |
| 340 | #[must_use] |
| 341 | pub fn with_viewport(mut self, viewport: Rect) -> Self { |
| 342 | self.top = viewport.y; |
| 343 | self.height = viewport.height.max(1); |
| 344 | self |
| 345 | } |
| 346 | |
| 347 | /// Continue the shared column through a shell-owned surface without |
| 348 | /// flattening semantic highlights (selection, hover, error, code blocks). |
| 349 | pub fn paint_matching(self, area: Rect, buf: &mut Buffer, background: Color) { |
| 350 | for y in area.top()..area.bottom() { |
| 351 | let row_bg = self.color_at_y(y); |
| 352 | for x in area.left()..area.right() { |
| 353 | let cell = &mut buf[(x, y)]; |
| 354 | if cell.bg == background { |
| 355 | cell.set_bg(row_bg); |
| 356 | } |
| 357 | } |
| 358 | } |
| 359 | } |
| 360 | } |
| 361 | |
| 362 | impl OceanRamp { |
| 363 | #[must_use] |
| 364 | pub fn for_theme(theme: &UiTheme) -> Option<Self> { |
| 365 | // The painted field exists only under the underwater theme; every |
| 366 | // other theme leaves the terminal's ground alone. A user-supplied |
| 367 | // `background_color` rewrites the underwater surfaces through |
| 368 | // `with_background_color` and remains the source of truth there. |
| 369 | if theme.name != codewhale_palette::UNDERWATER_UI_THEME.name { |
| 370 | return None; |
| 371 | } |
| 372 | |
| 373 | Some(Self { |
| 374 | // The authored Codewhale water column: unmistakably blue all the |
| 375 | // way to the floor. These restrained ocean shades sit between the |
| 376 | // shell's ink surfaces and its ambient blue, so the field gains |
| 377 | // depth without becoming a saturated blue panel. |
| 378 | surface: Color::Rgb(0x10, 0x2a, 0x45), |
| 379 | middle: Color::Rgb(0x0a, 0x1e, 0x33), |
| 380 | deep: Color::Rgb(0x06, 0x13, 0x20), |
| 381 | ambient: Color::Rgb(0x26, 0x48, 0x66), |
| 382 | attention: theme.warning, |
| 383 | failure: theme.error_fg, |
| 384 | }) |
| 385 | } |
| 386 | |
| 387 | /// Abyss Depth effect: wires context fullness (0..=100) into the water |
| 388 | /// column gradient calculation so that as context fills up, the dark |
| 389 | /// abyssal deep rises up to consume the sunlit surface gradient. |
| 390 | #[must_use] |
| 391 | pub fn color_at_context(self, row: u16, height: u16, context_percent: u8) -> Color { |
| 392 | if height <= 1 { |
| 393 | let abyss = f32::from(context_percent.min(100)) / 100.0; |
| 394 | return mix_colors(self.surface, self.deep, abyss); |
| 395 | } |
| 396 | let base_position = f32::from(row.min(height - 1)) / f32::from(height - 1); |
| 397 | let abyss_rise = f32::from(context_percent.min(100)) / 100.0; |
| 398 | let position = (base_position + abyss_rise).min(1.0); |
| 399 | // One continuous darkening curve (quadratic Bézier through |
| 400 | // surface → middle → deep, via de Casteljau). |
| 401 | let toward_middle = mix_colors(self.surface, self.middle, position); |
| 402 | let toward_deep = mix_colors(self.middle, self.deep, position); |
| 403 | mix_colors(toward_middle, toward_deep, position) |
| 404 | } |
| 405 | |
| 406 | #[must_use] |
| 407 | pub fn color_at_phase_context( |
| 408 | self, |
| 409 | row: u16, |
| 410 | height: u16, |
| 411 | elapsed_ms: u128, |
| 412 | phase: ShellPhase, |
| 413 | context_percent: u8, |
| 414 | ) -> Color { |
| 415 | let base = self.color_at_context(row, height, context_percent); |
| 416 | let depth = if height <= 1 { |
| 417 | 0.0 |
| 418 | } else { |
| 419 | let base_depth = f32::from(row.min(height - 1)) / f32::from(height - 1); |
| 420 | let abyss_rise = f32::from(context_percent.min(100)) / 100.0; |
| 421 | (base_depth + abyss_rise).min(1.0) |
| 422 | }; |
| 423 | if matches!( |
| 424 | phase, |
| 425 | ShellPhase::Waiting | ShellPhase::Approval | ShellPhase::Failed |
| 426 | ) { |
| 427 | return self.color_at_attention_context(row, height, phase, context_percent); |
| 428 | } |
| 429 | let cycle = (elapsed_ms % 90_000) as f32 / 90_000.0; |
| 430 | let breath = (cycle * std::f32::consts::TAU).sin() * 0.5 + 0.5; |
| 431 | let (phase_bias, phase_depth) = match phase { |
| 432 | ShellPhase::Idle => (0.035, 1.0 - depth), |
| 433 | ShellPhase::Typing => (0.025, 1.0 - depth), |
| 434 | ShellPhase::Working => (0.045, 0.35 + depth * 0.65), |
| 435 | ShellPhase::Verifying => (0.055, 0.65 + (1.0 - depth) * 0.35), |
| 436 | ShellPhase::Done => (0.018, 1.0 - depth), |
| 437 | ShellPhase::Waiting | ShellPhase::Approval | ShellPhase::Failed => unreachable!(), |
| 438 | }; |
| 439 | mix_colors(base, self.ambient, breath * phase_bias * phase_depth) |
| 440 | } |
| 441 | |
| 442 | /// Water tint for the states that need to read from across the room. |
| 443 | #[must_use] |
| 444 | pub fn color_at_attention_context( |
| 445 | self, |
| 446 | row: u16, |
| 447 | height: u16, |
| 448 | phase: ShellPhase, |
| 449 | context_percent: u8, |
| 450 | ) -> Color { |
| 451 | let base = self.color_at_context(row, height, context_percent); |
| 452 | let depth = if height <= 1 { |
| 453 | 0.0 |
| 454 | } else { |
| 455 | let base_depth = f32::from(row.min(height - 1)) / f32::from(height - 1); |
| 456 | let abyss_rise = f32::from(context_percent.min(100)) / 100.0; |
| 457 | (base_depth + abyss_rise).min(1.0) |
| 458 | }; |
| 459 | match phase { |
| 460 | ShellPhase::Waiting | ShellPhase::Approval => { |
| 461 | mix_colors(base, self.attention, 0.10 * (0.6 + 0.4 * (1.0 - depth))) |
| 462 | } |
| 463 | ShellPhase::Failed => mix_colors(base, self.failure, 0.09), |
| 464 | _ => base, |
| 465 | } |
| 466 | } |
| 467 | |
| 468 | #[must_use] |
| 469 | pub fn color_at_completion_context( |
| 470 | self, |
| 471 | row: u16, |
| 472 | height: u16, |
| 473 | elapsed_ms: u128, |
| 474 | context_percent: u8, |
| 475 | ) -> Color { |
| 476 | let base = self.color_at_context(row, height, context_percent); |
| 477 | let elapsed = elapsed_ms.min(800) as f32 / 800.0; |
| 478 | let brightness = if elapsed <= 0.4 { |
| 479 | 0.88 + (1.12 - 0.88) * (elapsed / 0.4) |
| 480 | } else { |
| 481 | 1.12 + (1.0 - 1.12) * ((elapsed - 0.4) / 0.6) |
| 482 | }; |
| 483 | scale_color(base, brightness) |
| 484 | } |
| 485 | } |
| 486 | |
| 487 | #[must_use] |
| 488 | fn rgb(value: Color) -> Option<(u8, u8, u8)> { |
| 489 | match value { |
| 490 | Color::Rgb(r, g, b) => Some((r, g, b)), |
| 491 | _ => None, |
| 492 | } |
| 493 | } |
| 494 | |
| 495 | #[must_use] |
| 496 | fn color((r, g, b): (u8, u8, u8)) -> Color { |
| 497 | Color::Rgb(r, g, b) |
| 498 | } |
| 499 | |
| 500 | #[must_use] |
| 501 | pub fn mix_colors(from: Color, to: Color, amount: f32) -> Color { |
| 502 | match (rgb(from), rgb(to)) { |
| 503 | (Some(from), Some(to)) => color(mix(from, to, amount)), |
| 504 | _ => from, |
| 505 | } |
| 506 | } |
| 507 | |
| 508 | #[must_use] |
| 509 | pub fn scale_color(value: Color, brightness: f32) -> Color { |
| 510 | let Some((r, g, b)) = rgb(value) else { |
| 511 | return value; |
| 512 | }; |
| 513 | color(( |
| 514 | (f32::from(r) * brightness).round().clamp(0.0, 255.0) as u8, |
| 515 | (f32::from(g) * brightness).round().clamp(0.0, 255.0) as u8, |
| 516 | (f32::from(b) * brightness).round().clamp(0.0, 255.0) as u8, |
| 517 | )) |
| 518 | } |
| 519 | |
| 520 | #[must_use] |
| 521 | fn mix(from: (u8, u8, u8), to: (u8, u8, u8), amount: f32) -> (u8, u8, u8) { |
| 522 | let amount = amount.clamp(0.0, 1.0); |
| 523 | let channel = |a: u8, b: u8| { |
| 524 | (f32::from(a) + (f32::from(b) - f32::from(a)) * amount) |
| 525 | .round() |
| 526 | .clamp(0.0, 255.0) as u8 |
| 527 | }; |
| 528 | ( |
| 529 | channel(from.0, to.0), |
| 530 | channel(from.1, to.1), |
| 531 | channel(from.2, to.2), |
| 532 | ) |
| 533 | } |
| 534 | |
| 535 | #[cfg(test)] |
| 536 | #[path = "ocean/tests.rs"] |
| 537 | mod tests; |
| 538 |