mirror of
https://github.com/heygen-com/hyperframes.git
synced 2026-09-01 19:42:03 +00:00
Miguel ÁngelandMiguel Angel Simon Sierra
1ae2067b8d
* feat(catalog): put the variables panel back, on payloads The panel drove its preview by loading an .html from docs/public, a type the host does not publish, so it showed an empty frame in production and was parked when the catalog was re-landed. It now mounts the same JSON payload the plain player uses and re-mounts it as values change, injecting them as window.__hfVariables into the composition head before any of its scripts run, which is where the runtime reads overrides from. Doing it in the markup rather than after load is what stops the composition initialising with the wrong values first. 172 items with variables get the panel back; the playhead carries across a change so a tweak mid-shot does not jump back to frame zero. * fix(docs): drop the unused url form and the needless escapes * fix(docs): the panel cannot reference a binding beside the export * feat(catalog): make importing an SVG the obvious move A reader arrives at this control with a shape, not with path data, and the panel asked for the coordinates first. Import is now the primary action in a drop target you can see is a drop target, and the raw path sits behind a disclosure for anyone who wants it. * feat(cli): let a fruitless catalog search report the gap An agent that searches by meaning and finds nothing worth installing knows something we do not: the name of a move the catalog is missing. There was no way to tell us, so that knowledge was lost at the end of every run. hyperframes feedback --search-miss "<query>" --wanted "<the move>" records it. It carries no rating, so it never lands in the rating metric, and it is a separate deliberate command rather than something catalog --query does on its own: plain search still sends nothing, which is what the CLI promises. --rating stops being required at the arg level, since a miss has no rating to give. The check moved into the run body, where an absent one is now handled rather than crashing on undefined. * feat(cli): carry tuned variable values into the install snippet Someone who tunes a block on its catalog page had no way to keep those values: the install command was the same one everybody gets, and the tuning stayed on the page. hyperframes add <item> --vars '<json>' now prints a mount element carrying data-variable-values, so the values land where the block is used. They ride on the host rather than being written into the installed file. That keeps the composition on disk byte-identical to the registry's, so a later reinstall can still tell an edit from an update, and it lets two mounts of the same block carry different values. * fix(catalog): serve the item's own directory so runtime paths resolve Some compositions assemble their asset URLs at run time — "compositions/components/" + texture + ".png" for the texture masks, a font the compiler pulled into _remote_media — and no scan of the markup can see a string that does not exist until a script concatenates it. Those items either rendered black or were dropped to a video that had never been uploaded. Each item that needs it now has its prepared directory published, and its payload carries a <base> pointing at it, so any relative path the composition invents resolves. caption-texture renders its masks again, and variable-font-flex has a preview at all for the first time: its MP4 and poster are both 403. Both layouts are published, because which one a composition asks for differs per item, and a directory only earns that if it is under 2 MB. The 12 MB texture sheet keeps the recorded video it already had. * fix(catalog): let the variables panel actually drive the composition Every control on the panel was inert. The values reached the composition and nothing repainted, because the payload had already been compiled: compiling inlines a mounted component and resolves its variables into the markup and CSS, so by the time a reader turns a knob there is nothing left to change. An item that declares variables now ships uncompiled, keeping the mount the runtime loads at run time, which is the only state where data-variable-values still means anything. The component travels inline as a data URI rather than a sibling file, because .html is the one type the docs host will not publish. The demo's own pinned values come off, so the reader's choices reach the mount instead of losing to the values the demo picked to show itself off. Measured on the rendered frame rather than the DOM: green rgb(98,207,144), blue rgb(6,6,199), violet rgb(177,147,230), and back to green. docs/public/catalog drops from 48 MB to 35 MB along the way, since an uncompiled payload carries far less than an inlined one. * feat(catalog): keep variable changes in the url A reader who tuned a piece lost it on reload, and had nothing to send anyone. The values now live in the query string, scoped by composition id so two links never read each other,and only the ones that differ from the defaults are written, so changing one knob gives a short URL rather than every variable spelled out. replaceState rather than pushState: dragging a slider should not leave a trail of history entries. An unreadable value is ignored rather than thrown, so a truncated or hand-edited link opens the piece at its defaults. * fix(catalog): only rewrite the url when a value actually changed * refactor(catalog): memoise the declared defaults on their content * feat(catalog): offer an install command carrying the tuned values The Install block is generated before anyone touches a knob, so it can only ever print the plain command. Someone who spent a minute tuning a piece copied it and got the defaults back. The panel now carries its own command in the Snippet tab, with --vars holding exactly the values that differ. An untouched piece still offers the same short command, so nothing gets noisier for the common case. * fix(catalog): a piece with nothing to render is a skip, not a failure caption-blend-difference is a stylesheet and a paragraph of prose — a class you add to your own captions, with no standalone scene to show. The generator treated that as a build failure, so every run ended by reporting something broken when nothing was. It now reports the shape it is and keeps its recorded video, which is the only honest preview such an item has. A genuine render failure still throws. * fix(catalog): restore variables from the url on a cold load A shared link opened at the defaults. The first render happens on the server, where there is no window to read the query string from, and React then hydrates against that markup and never revisits it — so the values only appeared once you touched a control. The URL is read again after mount, which is the first moment it exists. The value is also escaped once now rather than twice: URLSearchParams already decodes on the way out, and decoding a second time turned an SVG path full of percent-escapes into something that no longer parsed, besides doubling the length of every link. * fix(catalog): mount the preview with the values a link carried The frame was built from the declared defaults and the shared values were posted to it afterwards, which is too late for anything the composition reads once at init: a path arrived after the mark had already been drawn from the default one, so a link looked right in the panel and wrong on screen. * feat(catalog): the install command follows the values you tuned Copying the Install line gave the plain command back, because that block is generated before anyone touches a knob and had no way to know what changed. The tuned command only existed in the panel Snippet tab, which is not where anyone looks for it. The line now reads the same query string the panel writes, so the two agree without either component knowing the other exists, and a shared link carries the right command too. replaceState fires no event, so the panel announces its own writes. * fix(catalog): send a text variable to the preview once it is finished Every other control in the explorer reports a whole value on every event: a slider at any position is a position, a swatch is a colour. A text field is not. Typing v3 into a badge posted v first, so the preview remounted and rendered a composition built from half a word. The post now waits while a text field has focus and goes out when the edit is committed, with Enter or by clicking away. The field itself is unchanged and still tracks every keystroke. --------- Co-authored-by: Miguel Angel Simon Sierra <miguelangelsi07@gmail.com>
1098 lines
49 KiB
Plaintext
1098 lines
49 KiB
Plaintext
---
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title: "Ordered Dither Pass"
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description: "Bayer-matrix ordered dithering quantizes a slotted scene (rasterized once at mount): the image emerges from pure 2-tone noise to clean, or dissolves the reverse. Stateless per frame, never error diffusion."
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---
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import { InstallCommand } from "/snippets/install-command.jsx";
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import { VariablesExplorer } from "/snippets/variables-explorer.jsx";
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<VariablesExplorer
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previewSrc="/public/catalog/components/ordered-dither-pass.json"
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compositionId="ordered-dither-pass"
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compositionSrc="compositions/components/ordered-dither-pass.html"
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variables={[{"id":"matrix","type":"enum","role":"style","label":"Matrix","description":"Bayer matrix size: 2 is the coarsest crosshatch, 8 the smoothest ordered grain.","default":"4","options":[{"value":"2","label":"2 x 2"},{"value":"4","label":"4 x 4"},{"value":"8","label":"8 x 8"}]},{"id":"direction","type":"enum","role":"timing","label":"Direction","description":"in resolves noise to clean; out dissolves clean to noise and holds it.","default":"in","options":[{"value":"in","label":"Noise to clean"},{"value":"out","label":"Clean to noise"}]},{"id":"levels","type":"number","role":"style","label":"Levels","description":"Quantization levels per color channel during the dithered phase.","default":2,"min":2,"max":6,"step":1},{"id":"accent","type":"enum","role":"style","label":"Accent","description":"Light tone of the 2-tone noise phase: green rides --brand, blue rides --accent, violet rides --accent-2.","default":"green","options":[{"value":"green","label":"Green"},{"value":"blue","label":"Blue"},{"value":"violet","label":"Violet"}]},{"id":"exit","type":"enum","role":"timing","label":"Exit","description":"Optional departure. Default none: the final state holds until the frame cuts.","default":"none","options":[{"value":"none","label":"None"},{"value":"fade","label":"Fade"},{"value":"up","label":"Up"}]}]}
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>
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```html ordered-dither-pass.html
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<!doctype html>
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<!--
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ordered-dither-pass: HyperFrames video primitive (Wave M experiment,
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texture / transitions)
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Bayer-matrix ordered dithering quantizes a slotted scene. The source is
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rasterized ONCE at mount to a reduced-resolution offscreen buffer; every
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frame re-derives each output pixel from (source pixel, Bayer threshold,
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the animated dither amount), so the pass is stateless per frame. With
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direction "in" the image emerges from pure 2-tone noise (theme bg vs
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accent) into posterized color and finally clean; "out" runs the same
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ramp in reverse and holds the noise. Explicitly ordered (parallel,
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frame-independent) dithering, never error diffusion.
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The scene is a SLOT. Callers supply content by placing an inert template
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anywhere in the HOST page (templates never render, and the runtime wipes
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the host clip's own children on mount):
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<template data-slot="ordered-dither-pass-scene"> ... </template>
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Slot content is rasterized through an SVG foreignObject snapshot, so it
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must be self-contained: inline styles or rules carried by host <style>
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tags (which are copied into the snapshot), data-URI images only, system
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or already-active fonts. When no slot exists, the primitive rasterizes
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a token monogram tile drawn synchronously from contract tokens.
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Variables (declared in data-composition-variables below):
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- matrix ("2" | "4" | "8", default "4"): Bayer matrix size; 2 is the
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coarsest crosshatch, 8 the smoothest ordered grain.
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- direction ("in" | "out", default "in"): in resolves noise to clean;
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out dissolves clean to noise and holds it.
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- levels (2-6, default 2): quantization levels per color channel
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during the dithered phase.
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- accent ("green" | "blue" | "violet", default "green"): the light
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tone of the 2-tone noise phase; green rides --brand, blue rides
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--accent, violet rides --accent-2.
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- exit ("none" | "fade" | "up", default "none"): frame roots own
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transitions; the default holds the final state to the cut.
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Envelope, fixed segments with elastic HOLD only (never timeScale):
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0.00s the field fades up over 0.25s in its start state
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0.40s the dither amount ramps across 1.6s (power1.inOut)
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then HOLD, truly still (clean for "in", pure noise for "out")
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OUT = 0.45s only when exit is not none
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Determinism (canvas 2D law): the source buffer, the Bayer table, and
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every resolved color are fixed once at mount. Every painted frame is a
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pure function of (those tables, the timeline's current time): onUpdate
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rewrites one reused ImageData end to end and blits it, scaled with
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image smoothing off (the chunky retro pixel is the point). No
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Math.random, no wall clock, no incremental state; eventful seeks
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(suppressEvents false, the engine's render path) land identical frames
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in any order and either direction. The no-slot monogram raster is drawn
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synchronously before the timeline registers; a slotted raster arrives
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from the snapshot decode and repaints the current frame, after which
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all frames are pure f(t).
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-->
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<html
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lang="en"
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data-composition-id="ordered-dither-pass"
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data-composition-duration="3.5"
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data-composition-variables='[
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{ "id": "matrix", "type": "enum", "role": "style", "label": "Matrix", "description": "Bayer matrix size: 2 is the coarsest crosshatch, 8 the smoothest ordered grain.", "default": "4", "options": [{ "value": "2", "label": "2 x 2" }, { "value": "4", "label": "4 x 4" }, { "value": "8", "label": "8 x 8" }] },
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{ "id": "direction", "type": "enum", "role": "timing", "label": "Direction", "description": "in resolves noise to clean; out dissolves clean to noise and holds it.", "default": "in", "options": [{ "value": "in", "label": "Noise to clean" }, { "value": "out", "label": "Clean to noise" }] },
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{ "id": "levels", "type": "number", "role": "style", "label": "Levels", "description": "Quantization levels per color channel during the dithered phase.", "default": 2, "min": 2, "max": 6, "step": 1 },
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{ "id": "accent", "type": "enum", "role": "style", "label": "Accent", "description": "Light tone of the 2-tone noise phase: green rides --brand, blue rides --accent, violet rides --accent-2.", "default": "green", "options": [{ "value": "green", "label": "Green" }, { "value": "blue", "label": "Blue" }, { "value": "violet", "label": "Violet" }] },
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{ "id": "exit", "type": "enum", "role": "timing", "label": "Exit", "description": "Optional departure. Default none: the final state holds until the frame cuts.", "default": "none", "options": [{ "value": "none", "label": "None" }, { "value": "fade", "label": "Fade" }, { "value": "up", "label": "Up" }] }
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]'
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>
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<head>
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<meta charset="UTF-8" />
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<title>Ordered Dither Pass</title>
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</head>
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<body>
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<template>
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<div id="root" data-composition-id="ordered-dither-pass" data-duration="3.5" data-fps="30">
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<style>
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*,
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*::before,
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*::after {
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box-sizing: border-box;
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}
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#root {
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position: absolute;
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inset: 0;
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overflow: hidden;
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container-type: size;
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isolation: isolate;
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color: var(--fg, #f8fafc);
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font-family: var(--font-display, "Inter", system-ui, sans-serif);
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pointer-events: none;
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}
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.odp-clip {
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position: absolute;
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inset: 0;
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overflow: hidden;
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background: var(--bg, transparent);
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}
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.odp-stage {
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position: absolute;
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inset: 0;
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will-change: transform, opacity;
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}
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.odp-canvas {
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position: absolute;
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inset: 0;
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width: 100%;
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height: 100%;
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}
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</style>
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<div
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id="ordered-dither-pass-clip"
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class="odp-clip clip"
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data-start="0"
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data-duration="3.5"
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data-track-index="0"
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>
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<div class="odp-stage">
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<canvas class="odp-canvas" aria-hidden="true"></canvas>
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</div>
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</div>
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<script src="https://cdn.jsdelivr.net/npm/gsap@3.14.2/dist/gsap.min.js"></script>
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<script>
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(function () {
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"use strict";
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var root = document.getElementById("root");
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var stage = root.querySelector(".odp-stage");
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var canvas = root.querySelector(".odp-canvas");
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var vars =
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window.__hyperframes && window.__hyperframes.getVariables
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? window.__hyperframes.getVariables()
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: {};
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function num(value, fallback, min, max) {
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var n = Number(value);
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if (!isFinite(n)) n = fallback;
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return Math.max(min, Math.min(max, n));
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}
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var matrixSize = vars.matrix === "2" || vars.matrix === "8" ? Number(vars.matrix) : 4;
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var direction = vars.direction === "out" ? "out" : "in";
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var levels = Math.round(num(vars.levels, 2, 2, 6));
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var exit = vars.exit === "fade" || vars.exit === "up" ? vars.exit : "none";
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// Each enum choice routes to a DIFFERENT contract token so the
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// variable stays meaningful under a theme.
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var accentColors = {
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green: "var(--brand, #71f5a7)",
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blue: "var(--accent, #61a8ff)",
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violet: "var(--accent-2, #c5a3ff)",
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};
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var accent = Object.prototype.hasOwnProperty.call(accentColors, vars.accent)
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? vars.accent
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: "green";
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// Bundler mirrors composition variables as scoped CSS custom
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// props; when this unit's accent variable shadows the --accent
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// token ("blue" is a valid CSS color), fall back to the literal.
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var computedAccent = getComputedStyle(root).getPropertyValue("--accent").trim();
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if (
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computedAccent === "green" ||
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computedAccent === "blue" ||
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computedAccent === "violet"
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) {
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accentColors.blue = "#61a8ff";
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}
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// Envelope.
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var duration = Math.max(0.001, parseFloat(root.dataset.duration || "3.5"));
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var OUT = exit === "none" ? 0 : 0.45;
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var RAMP_AT = 0.4;
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var RAMP = Math.min(1.6, Math.max(0.6, duration - OUT - RAMP_AT - 0.4));
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var FADE_IN = 0.25;
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var OUT_START = duration - OUT;
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// Display canvas basis, fixed once at mount.
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var dpr = Math.min(2, Math.max(1, Number(window.devicePixelRatio) || 1));
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var box = root.getBoundingClientRect();
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var cssW = Math.max(1, Math.round(box.width) || 640);
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var cssH = Math.max(1, Math.round(box.height) || 360);
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canvas.width = Math.round(cssW * dpr);
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canvas.height = Math.round(cssH * dpr);
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var ctx = canvas.getContext("2d");
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ctx.imageSmoothingEnabled = false;
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// Reduced-resolution pixel buffer: one dither pixel is about 3
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// display px (capped 640 wide), the chunky retro read AND the
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// per-frame loop budget.
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var bufW = Math.max(8, Math.min(640, Math.round(cssW / 3)));
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var bufH = Math.max(8, Math.round(bufW * (cssH / cssW)));
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// Resolve tokens to concrete values once at mount.
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var hostDoc = root.ownerDocument;
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function resolveColor(cssColor, fallback) {
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var probe = hostDoc.createElement("span");
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probe.style.color = cssColor;
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root.appendChild(probe);
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var out = getComputedStyle(probe).color || fallback;
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probe.remove();
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return out;
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}
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function parseRgb(color, fallback) {
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var m = /rgba?\(\s*([\d.]+)[,\s]+([\d.]+)[,\s]+([\d.]+)/.exec(color);
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return m ? [Number(m[1]), Number(m[2]), Number(m[3])] : fallback;
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}
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var bgColor = resolveColor("var(--bg, #0b0c0e)", "#0b0c0e");
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var bgRgb = parseRgb(bgColor, [11, 12, 14]);
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var accentRgb = parseRgb(
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resolveColor(accentColors[accent], "#71f5a7"),
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[113, 245, 167],
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);
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var monoFamily = (function () {
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var probe = hostDoc.createElement("span");
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probe.style.fontFamily =
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'var(--font-mono, ui-monospace, "SF Mono", Menlo, Consolas, monospace)';
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root.appendChild(probe);
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var out = getComputedStyle(probe).fontFamily || "monospace";
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probe.remove();
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return out;
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})();
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// Bayer matrix, generated recursively; thresholds normalized to
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// (i + 0.5) / n^2 in [0, 1).
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var bayer = (function () {
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var m = [[0]];
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var size = 1;
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while (size < matrixSize) {
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var next = [];
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for (var y = 0; y < size * 2; y += 1) next.push(new Array(size * 2));
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for (var yy = 0; yy < size; yy += 1) {
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for (var xx = 0; xx < size; xx += 1) {
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var v = 4 * m[yy][xx];
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next[yy][xx] = v;
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next[yy][xx + size] = v + 2;
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next[yy + size][xx] = v + 3;
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next[yy + size][xx + size] = v + 1;
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}
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}
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m = next;
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size *= 2;
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}
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var n2 = matrixSize * matrixSize;
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var flat = new Float64Array(n2);
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for (var by = 0; by < matrixSize; by += 1) {
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for (var bx = 0; bx < matrixSize; bx += 1) {
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flat[by * matrixSize + bx] = (m[by][bx] + 0.5) / n2;
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}
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}
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return flat;
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})();
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// Source raster at buffer resolution, composited over the bg.
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var raster = hostDoc.createElement("canvas");
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raster.width = bufW;
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raster.height = bufH;
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var rctx = raster.getContext("2d");
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var srcData = null; // Uint8ClampedArray, fixed after raster
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var rasterReady = false;
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function paintMonogram(target, w, h) {
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var m = Math.min(w, h);
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target.fillStyle = bgColor;
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target.fillRect(0, 0, w, h);
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var tile = m * 0.62;
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var x = (w - tile) / 2;
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var y = (h - tile) / 2;
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target.fillStyle = resolveColor(
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"color-mix(in srgb, var(--surface, #14171c) 72%, " + accentColors[accent] + ")",
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"#1a2a22",
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);
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target.beginPath();
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if (target.roundRect) target.roundRect(x, y, tile, tile, m * 0.06);
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else target.rect(x, y, tile, tile);
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target.fill();
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target.fillStyle = resolveColor(
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"color-mix(in srgb, var(--fg, #f8fafc) 30%, " + accentColors[accent] + ")",
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"#a8f5c8",
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);
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target.font = "600 " + Math.round(m * 0.36) + "px " + monoFamily;
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target.textAlign = "center";
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target.textBaseline = "middle";
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target.fillText("H", w / 2, h / 2 + m * 0.014);
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}
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function finishRaster() {
|
|
srcData = rctx.getImageData(0, 0, bufW, bufH).data;
|
|
rasterReady = true;
|
|
root.setAttribute("data-odp-raster", "ready");
|
|
paint(tl ? tl.time() : 0);
|
|
}
|
|
|
|
// SLOT. Rasterized through an SVG foreignObject snapshot of the
|
|
// slot markup plus every host <style> tag and the resolved
|
|
// contract tokens.
|
|
var slotTemplate = null;
|
|
try {
|
|
slotTemplate = hostDoc.querySelector(
|
|
'template[data-slot="ordered-dither-pass-scene"]',
|
|
);
|
|
} catch (error) {
|
|
slotTemplate = null;
|
|
}
|
|
|
|
if (slotTemplate) {
|
|
var tokenNames = [
|
|
"--bg",
|
|
"--fg",
|
|
"--muted",
|
|
"--surface",
|
|
"--border",
|
|
"--brand",
|
|
"--accent",
|
|
"--accent-2",
|
|
"--font-display",
|
|
"--font-body",
|
|
"--font-mono",
|
|
"--radius",
|
|
"--space-1",
|
|
"--space-2",
|
|
"--space-3",
|
|
"--dur-beat",
|
|
"--ease-standard",
|
|
"--ease-emphasis",
|
|
];
|
|
var rootStyle = getComputedStyle(root);
|
|
var tokenDecl = "";
|
|
for (var ti = 0; ti < tokenNames.length; ti += 1) {
|
|
var tv = rootStyle.getPropertyValue(tokenNames[ti]).trim();
|
|
if (tv) tokenDecl += tokenNames[ti] + ":" + tv + ";";
|
|
}
|
|
var styleTexts = "";
|
|
var styleTags = hostDoc.querySelectorAll("style");
|
|
for (var si = 0; si < styleTags.length; si += 1) {
|
|
styleTexts += styleTags[si].textContent || "";
|
|
}
|
|
// Snapshot at css size for faithful layout, then downsample
|
|
// into the buffer raster.
|
|
var wrapper = hostDoc.createElement("div");
|
|
wrapper.setAttribute(
|
|
"style",
|
|
"width:" +
|
|
cssW +
|
|
"px;height:" +
|
|
cssH +
|
|
"px;overflow:hidden;position:relative;" +
|
|
"display:grid;place-items:center;background:" +
|
|
bgColor +
|
|
";" +
|
|
tokenDecl,
|
|
);
|
|
wrapper.appendChild(hostDoc.importNode(slotTemplate.content, true));
|
|
var styleEl = hostDoc.createElement("style");
|
|
styleEl.textContent = styleTexts;
|
|
wrapper.insertBefore(styleEl, wrapper.firstChild);
|
|
var serialized = new XMLSerializer().serializeToString(wrapper);
|
|
var svgMarkup =
|
|
// No xmlns on foreignObject: a default xmlns declaration
|
|
// applies to the declaring element itself and would eject
|
|
// foreignObject from the SVG namespace (renders blank). The
|
|
// serialized wrapper div already carries the XHTML namespace.
|
|
'<svg xmlns="http://www.w3.org/2000/svg" width="' +
|
|
cssW +
|
|
'" height="' +
|
|
cssH +
|
|
'"><foreignObject width="' +
|
|
cssW +
|
|
'" height="' +
|
|
cssH +
|
|
'">' +
|
|
serialized +
|
|
"</foreignObject></svg>";
|
|
var snapshot = new Image();
|
|
snapshot.onload = function () {
|
|
rctx.fillStyle = bgColor;
|
|
rctx.fillRect(0, 0, bufW, bufH);
|
|
rctx.drawImage(snapshot, 0, 0, bufW, bufH);
|
|
try {
|
|
finishRaster();
|
|
} catch (error) {
|
|
// Tainted or unreadable snapshot: fall back to the monogram.
|
|
paintMonogram(rctx, bufW, bufH);
|
|
finishRaster();
|
|
}
|
|
};
|
|
snapshot.onerror = function () {
|
|
paintMonogram(rctx, bufW, bufH);
|
|
finishRaster();
|
|
};
|
|
snapshot.src = "data:image/svg+xml;charset=utf-8," + encodeURIComponent(svgMarkup);
|
|
} else {
|
|
paintMonogram(rctx, bufW, bufH);
|
|
srcData = rctx.getImageData(0, 0, bufW, bufH).data;
|
|
rasterReady = true;
|
|
root.setAttribute("data-odp-raster", "ready");
|
|
}
|
|
|
|
var outImage = rctx.createImageData(bufW, bufH);
|
|
|
|
function clamp01(v) {
|
|
return v < 0 ? 0 : v > 1 ? 1 : v;
|
|
}
|
|
|
|
// The whole pass is one scalar a(t) in [0, 1]: 1 = pure 2-tone
|
|
// noise, 0 = clean source.
|
|
// contrast = clamp01((1 - a) * 1.6) signal emerges under dither
|
|
// cleanMix = clamp01(((1 - a) - 0.55) / 0.45) dither releases
|
|
// duoMix = clamp01((a - 0.55) / 0.45) noise phase is duotone
|
|
function amountAt(t) {
|
|
var p = clamp01((t - RAMP_AT) / RAMP);
|
|
// power1.inOut
|
|
p = p < 0.5 ? 2 * p * p : 1 - 2 * (1 - p) * (1 - p);
|
|
return direction === "in" ? 1 - p : p;
|
|
}
|
|
|
|
// Pure repaint from (srcData, bayer, t): every output pixel is
|
|
// rewritten, no state survives between frames.
|
|
function paint(timeSeconds) {
|
|
ctx.fillStyle = bgColor;
|
|
ctx.fillRect(0, 0, canvas.width, canvas.height);
|
|
if (!rasterReady) return;
|
|
var fade = clamp01(timeSeconds / FADE_IN);
|
|
var a = amountAt(timeSeconds);
|
|
var contrast = clamp01((1 - a) * 1.6);
|
|
var cleanMix = clamp01((1 - a - 0.55) / 0.45);
|
|
var duoMix = clamp01((a - 0.55) / 0.45);
|
|
var L1 = levels - 1;
|
|
var out = outImage.data;
|
|
for (var y = 0; y < bufH; y += 1) {
|
|
var brow = (y % matrixSize) * matrixSize;
|
|
for (var x = 0; x < bufW; x += 1) {
|
|
var th = bayer[brow + (x % matrixSize)];
|
|
var i = (y * bufW + x) * 4;
|
|
var vr = 0.5 + (srcData[i] / 255 - 0.5) * contrast;
|
|
var vg = 0.5 + (srcData[i + 1] / 255 - 0.5) * contrast;
|
|
var vb = 0.5 + (srcData[i + 2] / 255 - 0.5) * contrast;
|
|
var qr = Math.floor(vr * L1 + th) / L1;
|
|
var qg = Math.floor(vg * L1 + th) / L1;
|
|
var qb = Math.floor(vb * L1 + th) / L1;
|
|
qr = qr < 0 ? 0 : qr > 1 ? 1 : qr;
|
|
qg = qg < 0 ? 0 : qg > 1 ? 1 : qg;
|
|
qb = qb < 0 ? 0 : qb > 1 ? 1 : qb;
|
|
// Noise phase is a BINARY luminance threshold, independent
|
|
// of levels: odd level counts put flat mid-gray exactly on
|
|
// a quantization step, which would render the "pure noise"
|
|
// pole as a flat field instead of the Bayer pattern.
|
|
var lum = 0.299 * vr + 0.587 * vg + 0.114 * vb;
|
|
var tone = lum > th ? 1 : 0;
|
|
var dr = bgRgb[0] + (accentRgb[0] - bgRgb[0]) * tone;
|
|
var dg = bgRgb[1] + (accentRgb[1] - bgRgb[1]) * tone;
|
|
var db = bgRgb[2] + (accentRgb[2] - bgRgb[2]) * tone;
|
|
var r = qr * 255 + (dr - qr * 255) * duoMix;
|
|
var g = qg * 255 + (dg - qg * 255) * duoMix;
|
|
var b = qb * 255 + (db - qb * 255) * duoMix;
|
|
r += (srcData[i] - r) * cleanMix;
|
|
g += (srcData[i + 1] - g) * cleanMix;
|
|
b += (srcData[i + 2] - b) * cleanMix;
|
|
out[i] = r;
|
|
out[i + 1] = g;
|
|
out[i + 2] = b;
|
|
out[i + 3] = 255;
|
|
}
|
|
}
|
|
rctx.putImageData(outImage, 0, 0);
|
|
ctx.globalAlpha = fade;
|
|
ctx.drawImage(raster, 0, 0, bufW, bufH, 0, 0, canvas.width, canvas.height);
|
|
ctx.globalAlpha = 1;
|
|
// putImageData reuses the raster canvas as a blit surface;
|
|
// srcData is a detached copy, so the source stays pristine.
|
|
}
|
|
|
|
gsap.set(stage, { opacity: 1, y: "0cqh" });
|
|
|
|
var tl = gsap.timeline({
|
|
paused: true,
|
|
onUpdate: function () {
|
|
paint(tl.time());
|
|
},
|
|
});
|
|
|
|
// Anchor tween: spans the full authored duration so onUpdate
|
|
// (the canvas repaint) fires for every eventful seek in [0, D]
|
|
// and holds keep tl.time() honest.
|
|
tl.to({ t: 0 }, { t: 1, duration: duration, ease: "none" }, 0);
|
|
|
|
// HOLD: truly still (a(t) is constant past the ramp, the source
|
|
// raster never changes).
|
|
|
|
// OUT: optional departure; exit none holds until the frame cuts.
|
|
if (exit === "up") {
|
|
tl.to(stage, { y: "-4cqh", duration: OUT, ease: "power2.in" }, OUT_START);
|
|
tl.to(stage, { opacity: 0, duration: OUT, ease: "power2.in" }, OUT_START);
|
|
} else if (exit === "fade") {
|
|
tl.to(stage, { opacity: 0, duration: OUT, ease: "power2.in" }, OUT_START);
|
|
}
|
|
|
|
tl.seek(0);
|
|
paint(0);
|
|
window.__timelines = window.__timelines || {};
|
|
window.__timelines["ordered-dither-pass"] = tl;
|
|
})();
|
|
</script>
|
|
</div>
|
|
</template>
|
|
</body>
|
|
</html>
|
|
```
|
|
|
|
</VariablesExplorer>
|
|
|
|
## Install
|
|
|
|
<InstallCommand command="npx hyperframes add ordered-dither-pass" item="ordered-dither-pass" />
|
|
|
|
That writes one file: `compositions/components/ordered-dither-pass.html`.
|
|
|
|
## Paste it into your composition
|
|
|
|
Open `compositions/components/ordered-dither-pass.html` and copy what is inside into your own composition.
|
|
|
|
A component has no size or duration of its own. It takes both from the composition
|
|
you paste it into.
|
|
|
|
## Variables
|
|
|
|
Every one of these has a default, so the piece works untouched. Set the ones you
|
|
want to change on the element:
|
|
|
|
| Variable | Default | Accepts | What it does |
|
|
| --- | --- | --- | --- |
|
|
| `matrix` | `4` | `2`, `4`, `8` | Bayer matrix size: 2 is the coarsest crosshatch, 8 the smoothest ordered grain. |
|
|
| `direction` | `in` | `in`, `out` | in resolves noise to clean; out dissolves clean to noise and holds it. |
|
|
| `levels` | `2` | 2 to 6, step 1 | Quantization levels per color channel during the dithered phase. |
|
|
| `accent` | `green` | `green`, `blue`, `violet` | Light tone of the 2-tone noise phase: green rides --brand, blue rides --accent, violet rides --accent-2. |
|
|
| `exit` | `none` | `none`, `fade`, `up` | Optional departure. Default none: the final state holds until the frame cuts. |
|
|
|
|
Set them with `data-variable-values` on the element that mounts it. These are the
|
|
defaults, so this behaves exactly like the preview above until you change one:
|
|
|
|
```html wrap
|
|
<div
|
|
data-composition-id="ordered-dither-pass"
|
|
data-composition-src="compositions/components/ordered-dither-pass.html"
|
|
data-variable-values='{"matrix":"4","direction":"in","levels":2,"accent":"green","exit":"none"}'
|
|
></div>
|
|
```
|
|
|
|
## Source
|
|
|
|
<Accordion title={`ordered-dither-pass.html`}>
|
|
|
|
```html
|
|
<!doctype html>
|
|
<!--
|
|
ordered-dither-pass: HyperFrames video primitive (Wave M experiment,
|
|
texture / transitions)
|
|
|
|
Bayer-matrix ordered dithering quantizes a slotted scene. The source is
|
|
rasterized ONCE at mount to a reduced-resolution offscreen buffer; every
|
|
frame re-derives each output pixel from (source pixel, Bayer threshold,
|
|
the animated dither amount), so the pass is stateless per frame. With
|
|
direction "in" the image emerges from pure 2-tone noise (theme bg vs
|
|
accent) into posterized color and finally clean; "out" runs the same
|
|
ramp in reverse and holds the noise. Explicitly ordered (parallel,
|
|
frame-independent) dithering, never error diffusion.
|
|
|
|
The scene is a SLOT. Callers supply content by placing an inert template
|
|
anywhere in the HOST page (templates never render, and the runtime wipes
|
|
the host clip's own children on mount):
|
|
|
|
<template data-slot="ordered-dither-pass-scene"> ... </template>
|
|
|
|
Slot content is rasterized through an SVG foreignObject snapshot, so it
|
|
must be self-contained: inline styles or rules carried by host <style>
|
|
tags (which are copied into the snapshot), data-URI images only, system
|
|
or already-active fonts. When no slot exists, the primitive rasterizes
|
|
a token monogram tile drawn synchronously from contract tokens.
|
|
|
|
Variables (declared in data-composition-variables below):
|
|
- matrix ("2" | "4" | "8", default "4"): Bayer matrix size; 2 is the
|
|
coarsest crosshatch, 8 the smoothest ordered grain.
|
|
- direction ("in" | "out", default "in"): in resolves noise to clean;
|
|
out dissolves clean to noise and holds it.
|
|
- levels (2-6, default 2): quantization levels per color channel
|
|
during the dithered phase.
|
|
- accent ("green" | "blue" | "violet", default "green"): the light
|
|
tone of the 2-tone noise phase; green rides --brand, blue rides
|
|
--accent, violet rides --accent-2.
|
|
- exit ("none" | "fade" | "up", default "none"): frame roots own
|
|
transitions; the default holds the final state to the cut.
|
|
|
|
Envelope, fixed segments with elastic HOLD only (never timeScale):
|
|
0.00s the field fades up over 0.25s in its start state
|
|
0.40s the dither amount ramps across 1.6s (power1.inOut)
|
|
then HOLD, truly still (clean for "in", pure noise for "out")
|
|
OUT = 0.45s only when exit is not none
|
|
|
|
Determinism (canvas 2D law): the source buffer, the Bayer table, and
|
|
every resolved color are fixed once at mount. Every painted frame is a
|
|
pure function of (those tables, the timeline's current time): onUpdate
|
|
rewrites one reused ImageData end to end and blits it, scaled with
|
|
image smoothing off (the chunky retro pixel is the point). No
|
|
Math.random, no wall clock, no incremental state; eventful seeks
|
|
(suppressEvents false, the engine's render path) land identical frames
|
|
in any order and either direction. The no-slot monogram raster is drawn
|
|
synchronously before the timeline registers; a slotted raster arrives
|
|
from the snapshot decode and repaints the current frame, after which
|
|
all frames are pure f(t).
|
|
-->
|
|
<html
|
|
lang="en"
|
|
data-composition-id="ordered-dither-pass"
|
|
data-composition-duration="3.5"
|
|
data-composition-variables='[
|
|
{ "id": "matrix", "type": "enum", "role": "style", "label": "Matrix", "description": "Bayer matrix size: 2 is the coarsest crosshatch, 8 the smoothest ordered grain.", "default": "4", "options": [{ "value": "2", "label": "2 x 2" }, { "value": "4", "label": "4 x 4" }, { "value": "8", "label": "8 x 8" }] },
|
|
{ "id": "direction", "type": "enum", "role": "timing", "label": "Direction", "description": "in resolves noise to clean; out dissolves clean to noise and holds it.", "default": "in", "options": [{ "value": "in", "label": "Noise to clean" }, { "value": "out", "label": "Clean to noise" }] },
|
|
{ "id": "levels", "type": "number", "role": "style", "label": "Levels", "description": "Quantization levels per color channel during the dithered phase.", "default": 2, "min": 2, "max": 6, "step": 1 },
|
|
{ "id": "accent", "type": "enum", "role": "style", "label": "Accent", "description": "Light tone of the 2-tone noise phase: green rides --brand, blue rides --accent, violet rides --accent-2.", "default": "green", "options": [{ "value": "green", "label": "Green" }, { "value": "blue", "label": "Blue" }, { "value": "violet", "label": "Violet" }] },
|
|
{ "id": "exit", "type": "enum", "role": "timing", "label": "Exit", "description": "Optional departure. Default none: the final state holds until the frame cuts.", "default": "none", "options": [{ "value": "none", "label": "None" }, { "value": "fade", "label": "Fade" }, { "value": "up", "label": "Up" }] }
|
|
]'
|
|
>
|
|
<head>
|
|
<meta charset="UTF-8" />
|
|
<title>Ordered Dither Pass</title>
|
|
</head>
|
|
<body>
|
|
<template>
|
|
<div id="root" data-composition-id="ordered-dither-pass" data-duration="3.5" data-fps="30">
|
|
<style>
|
|
*,
|
|
*::before,
|
|
*::after {
|
|
box-sizing: border-box;
|
|
}
|
|
|
|
#root {
|
|
position: absolute;
|
|
inset: 0;
|
|
overflow: hidden;
|
|
container-type: size;
|
|
isolation: isolate;
|
|
color: var(--fg, #f8fafc);
|
|
font-family: var(--font-display, "Inter", system-ui, sans-serif);
|
|
pointer-events: none;
|
|
}
|
|
|
|
.odp-clip {
|
|
position: absolute;
|
|
inset: 0;
|
|
overflow: hidden;
|
|
background: var(--bg, transparent);
|
|
}
|
|
|
|
.odp-stage {
|
|
position: absolute;
|
|
inset: 0;
|
|
will-change: transform, opacity;
|
|
}
|
|
|
|
.odp-canvas {
|
|
position: absolute;
|
|
inset: 0;
|
|
width: 100%;
|
|
height: 100%;
|
|
}
|
|
</style>
|
|
|
|
<div
|
|
id="ordered-dither-pass-clip"
|
|
class="odp-clip clip"
|
|
data-start="0"
|
|
data-duration="3.5"
|
|
data-track-index="0"
|
|
>
|
|
<div class="odp-stage">
|
|
<canvas class="odp-canvas" aria-hidden="true"></canvas>
|
|
</div>
|
|
</div>
|
|
|
|
<script src="https://cdn.jsdelivr.net/npm/gsap@3.14.2/dist/gsap.min.js"></script>
|
|
<script>
|
|
(function () {
|
|
"use strict";
|
|
|
|
var root = document.getElementById("root");
|
|
var stage = root.querySelector(".odp-stage");
|
|
var canvas = root.querySelector(".odp-canvas");
|
|
var vars =
|
|
window.__hyperframes && window.__hyperframes.getVariables
|
|
? window.__hyperframes.getVariables()
|
|
: {};
|
|
|
|
function num(value, fallback, min, max) {
|
|
var n = Number(value);
|
|
if (!isFinite(n)) n = fallback;
|
|
return Math.max(min, Math.min(max, n));
|
|
}
|
|
|
|
var matrixSize = vars.matrix === "2" || vars.matrix === "8" ? Number(vars.matrix) : 4;
|
|
var direction = vars.direction === "out" ? "out" : "in";
|
|
var levels = Math.round(num(vars.levels, 2, 2, 6));
|
|
var exit = vars.exit === "fade" || vars.exit === "up" ? vars.exit : "none";
|
|
// Each enum choice routes to a DIFFERENT contract token so the
|
|
// variable stays meaningful under a theme.
|
|
var accentColors = {
|
|
green: "var(--brand, #71f5a7)",
|
|
blue: "var(--accent, #61a8ff)",
|
|
violet: "var(--accent-2, #c5a3ff)",
|
|
};
|
|
var accent = Object.prototype.hasOwnProperty.call(accentColors, vars.accent)
|
|
? vars.accent
|
|
: "green";
|
|
// Bundler mirrors composition variables as scoped CSS custom
|
|
// props; when this unit's accent variable shadows the --accent
|
|
// token ("blue" is a valid CSS color), fall back to the literal.
|
|
var computedAccent = getComputedStyle(root).getPropertyValue("--accent").trim();
|
|
if (
|
|
computedAccent === "green" ||
|
|
computedAccent === "blue" ||
|
|
computedAccent === "violet"
|
|
) {
|
|
accentColors.blue = "#61a8ff";
|
|
}
|
|
|
|
// Envelope.
|
|
var duration = Math.max(0.001, parseFloat(root.dataset.duration || "3.5"));
|
|
var OUT = exit === "none" ? 0 : 0.45;
|
|
var RAMP_AT = 0.4;
|
|
var RAMP = Math.min(1.6, Math.max(0.6, duration - OUT - RAMP_AT - 0.4));
|
|
var FADE_IN = 0.25;
|
|
var OUT_START = duration - OUT;
|
|
|
|
// Display canvas basis, fixed once at mount.
|
|
var dpr = Math.min(2, Math.max(1, Number(window.devicePixelRatio) || 1));
|
|
var box = root.getBoundingClientRect();
|
|
var cssW = Math.max(1, Math.round(box.width) || 640);
|
|
var cssH = Math.max(1, Math.round(box.height) || 360);
|
|
canvas.width = Math.round(cssW * dpr);
|
|
canvas.height = Math.round(cssH * dpr);
|
|
var ctx = canvas.getContext("2d");
|
|
ctx.imageSmoothingEnabled = false;
|
|
|
|
// Reduced-resolution pixel buffer: one dither pixel is about 3
|
|
// display px (capped 640 wide), the chunky retro read AND the
|
|
// per-frame loop budget.
|
|
var bufW = Math.max(8, Math.min(640, Math.round(cssW / 3)));
|
|
var bufH = Math.max(8, Math.round(bufW * (cssH / cssW)));
|
|
|
|
// Resolve tokens to concrete values once at mount.
|
|
var hostDoc = root.ownerDocument;
|
|
function resolveColor(cssColor, fallback) {
|
|
var probe = hostDoc.createElement("span");
|
|
probe.style.color = cssColor;
|
|
root.appendChild(probe);
|
|
var out = getComputedStyle(probe).color || fallback;
|
|
probe.remove();
|
|
return out;
|
|
}
|
|
function parseRgb(color, fallback) {
|
|
var m = /rgba?\(\s*([\d.]+)[,\s]+([\d.]+)[,\s]+([\d.]+)/.exec(color);
|
|
return m ? [Number(m[1]), Number(m[2]), Number(m[3])] : fallback;
|
|
}
|
|
var bgColor = resolveColor("var(--bg, #0b0c0e)", "#0b0c0e");
|
|
var bgRgb = parseRgb(bgColor, [11, 12, 14]);
|
|
var accentRgb = parseRgb(
|
|
resolveColor(accentColors[accent], "#71f5a7"),
|
|
[113, 245, 167],
|
|
);
|
|
var monoFamily = (function () {
|
|
var probe = hostDoc.createElement("span");
|
|
probe.style.fontFamily =
|
|
'var(--font-mono, ui-monospace, "SF Mono", Menlo, Consolas, monospace)';
|
|
root.appendChild(probe);
|
|
var out = getComputedStyle(probe).fontFamily || "monospace";
|
|
probe.remove();
|
|
return out;
|
|
})();
|
|
|
|
// Bayer matrix, generated recursively; thresholds normalized to
|
|
// (i + 0.5) / n^2 in [0, 1).
|
|
var bayer = (function () {
|
|
var m = [[0]];
|
|
var size = 1;
|
|
while (size < matrixSize) {
|
|
var next = [];
|
|
for (var y = 0; y < size * 2; y += 1) next.push(new Array(size * 2));
|
|
for (var yy = 0; yy < size; yy += 1) {
|
|
for (var xx = 0; xx < size; xx += 1) {
|
|
var v = 4 * m[yy][xx];
|
|
next[yy][xx] = v;
|
|
next[yy][xx + size] = v + 2;
|
|
next[yy + size][xx] = v + 3;
|
|
next[yy + size][xx + size] = v + 1;
|
|
}
|
|
}
|
|
m = next;
|
|
size *= 2;
|
|
}
|
|
var n2 = matrixSize * matrixSize;
|
|
var flat = new Float64Array(n2);
|
|
for (var by = 0; by < matrixSize; by += 1) {
|
|
for (var bx = 0; bx < matrixSize; bx += 1) {
|
|
flat[by * matrixSize + bx] = (m[by][bx] + 0.5) / n2;
|
|
}
|
|
}
|
|
return flat;
|
|
})();
|
|
|
|
// Source raster at buffer resolution, composited over the bg.
|
|
var raster = hostDoc.createElement("canvas");
|
|
raster.width = bufW;
|
|
raster.height = bufH;
|
|
var rctx = raster.getContext("2d");
|
|
|
|
var srcData = null; // Uint8ClampedArray, fixed after raster
|
|
var rasterReady = false;
|
|
|
|
function paintMonogram(target, w, h) {
|
|
var m = Math.min(w, h);
|
|
target.fillStyle = bgColor;
|
|
target.fillRect(0, 0, w, h);
|
|
var tile = m * 0.62;
|
|
var x = (w - tile) / 2;
|
|
var y = (h - tile) / 2;
|
|
target.fillStyle = resolveColor(
|
|
"color-mix(in srgb, var(--surface, #14171c) 72%, " + accentColors[accent] + ")",
|
|
"#1a2a22",
|
|
);
|
|
target.beginPath();
|
|
if (target.roundRect) target.roundRect(x, y, tile, tile, m * 0.06);
|
|
else target.rect(x, y, tile, tile);
|
|
target.fill();
|
|
target.fillStyle = resolveColor(
|
|
"color-mix(in srgb, var(--fg, #f8fafc) 30%, " + accentColors[accent] + ")",
|
|
"#a8f5c8",
|
|
);
|
|
target.font = "600 " + Math.round(m * 0.36) + "px " + monoFamily;
|
|
target.textAlign = "center";
|
|
target.textBaseline = "middle";
|
|
target.fillText("H", w / 2, h / 2 + m * 0.014);
|
|
}
|
|
|
|
function finishRaster() {
|
|
srcData = rctx.getImageData(0, 0, bufW, bufH).data;
|
|
rasterReady = true;
|
|
root.setAttribute("data-odp-raster", "ready");
|
|
paint(tl ? tl.time() : 0);
|
|
}
|
|
|
|
// SLOT. Rasterized through an SVG foreignObject snapshot of the
|
|
// slot markup plus every host <style> tag and the resolved
|
|
// contract tokens.
|
|
var slotTemplate = null;
|
|
try {
|
|
slotTemplate = hostDoc.querySelector(
|
|
'template[data-slot="ordered-dither-pass-scene"]',
|
|
);
|
|
} catch (error) {
|
|
slotTemplate = null;
|
|
}
|
|
|
|
if (slotTemplate) {
|
|
var tokenNames = [
|
|
"--bg",
|
|
"--fg",
|
|
"--muted",
|
|
"--surface",
|
|
"--border",
|
|
"--brand",
|
|
"--accent",
|
|
"--accent-2",
|
|
"--font-display",
|
|
"--font-body",
|
|
"--font-mono",
|
|
"--radius",
|
|
"--space-1",
|
|
"--space-2",
|
|
"--space-3",
|
|
"--dur-beat",
|
|
"--ease-standard",
|
|
"--ease-emphasis",
|
|
];
|
|
var rootStyle = getComputedStyle(root);
|
|
var tokenDecl = "";
|
|
for (var ti = 0; ti < tokenNames.length; ti += 1) {
|
|
var tv = rootStyle.getPropertyValue(tokenNames[ti]).trim();
|
|
if (tv) tokenDecl += tokenNames[ti] + ":" + tv + ";";
|
|
}
|
|
var styleTexts = "";
|
|
var styleTags = hostDoc.querySelectorAll("style");
|
|
for (var si = 0; si < styleTags.length; si += 1) {
|
|
styleTexts += styleTags[si].textContent || "";
|
|
}
|
|
// Snapshot at css size for faithful layout, then downsample
|
|
// into the buffer raster.
|
|
var wrapper = hostDoc.createElement("div");
|
|
wrapper.setAttribute(
|
|
"style",
|
|
"width:" +
|
|
cssW +
|
|
"px;height:" +
|
|
cssH +
|
|
"px;overflow:hidden;position:relative;" +
|
|
"display:grid;place-items:center;background:" +
|
|
bgColor +
|
|
";" +
|
|
tokenDecl,
|
|
);
|
|
wrapper.appendChild(hostDoc.importNode(slotTemplate.content, true));
|
|
var styleEl = hostDoc.createElement("style");
|
|
styleEl.textContent = styleTexts;
|
|
wrapper.insertBefore(styleEl, wrapper.firstChild);
|
|
var serialized = new XMLSerializer().serializeToString(wrapper);
|
|
var svgMarkup =
|
|
// No xmlns on foreignObject: a default xmlns declaration
|
|
// applies to the declaring element itself and would eject
|
|
// foreignObject from the SVG namespace (renders blank). The
|
|
// serialized wrapper div already carries the XHTML namespace.
|
|
'<svg xmlns="http://www.w3.org/2000/svg" width="' +
|
|
cssW +
|
|
'" height="' +
|
|
cssH +
|
|
'"><foreignObject width="' +
|
|
cssW +
|
|
'" height="' +
|
|
cssH +
|
|
'">' +
|
|
serialized +
|
|
"</foreignObject></svg>";
|
|
var snapshot = new Image();
|
|
snapshot.onload = function () {
|
|
rctx.fillStyle = bgColor;
|
|
rctx.fillRect(0, 0, bufW, bufH);
|
|
rctx.drawImage(snapshot, 0, 0, bufW, bufH);
|
|
try {
|
|
finishRaster();
|
|
} catch (error) {
|
|
// Tainted or unreadable snapshot: fall back to the monogram.
|
|
paintMonogram(rctx, bufW, bufH);
|
|
finishRaster();
|
|
}
|
|
};
|
|
snapshot.onerror = function () {
|
|
paintMonogram(rctx, bufW, bufH);
|
|
finishRaster();
|
|
};
|
|
snapshot.src = "data:image/svg+xml;charset=utf-8," + encodeURIComponent(svgMarkup);
|
|
} else {
|
|
paintMonogram(rctx, bufW, bufH);
|
|
srcData = rctx.getImageData(0, 0, bufW, bufH).data;
|
|
rasterReady = true;
|
|
root.setAttribute("data-odp-raster", "ready");
|
|
}
|
|
|
|
var outImage = rctx.createImageData(bufW, bufH);
|
|
|
|
function clamp01(v) {
|
|
return v < 0 ? 0 : v > 1 ? 1 : v;
|
|
}
|
|
|
|
// The whole pass is one scalar a(t) in [0, 1]: 1 = pure 2-tone
|
|
// noise, 0 = clean source.
|
|
// contrast = clamp01((1 - a) * 1.6) signal emerges under dither
|
|
// cleanMix = clamp01(((1 - a) - 0.55) / 0.45) dither releases
|
|
// duoMix = clamp01((a - 0.55) / 0.45) noise phase is duotone
|
|
function amountAt(t) {
|
|
var p = clamp01((t - RAMP_AT) / RAMP);
|
|
// power1.inOut
|
|
p = p < 0.5 ? 2 * p * p : 1 - 2 * (1 - p) * (1 - p);
|
|
return direction === "in" ? 1 - p : p;
|
|
}
|
|
|
|
// Pure repaint from (srcData, bayer, t): every output pixel is
|
|
// rewritten, no state survives between frames.
|
|
function paint(timeSeconds) {
|
|
ctx.fillStyle = bgColor;
|
|
ctx.fillRect(0, 0, canvas.width, canvas.height);
|
|
if (!rasterReady) return;
|
|
var fade = clamp01(timeSeconds / FADE_IN);
|
|
var a = amountAt(timeSeconds);
|
|
var contrast = clamp01((1 - a) * 1.6);
|
|
var cleanMix = clamp01((1 - a - 0.55) / 0.45);
|
|
var duoMix = clamp01((a - 0.55) / 0.45);
|
|
var L1 = levels - 1;
|
|
var out = outImage.data;
|
|
for (var y = 0; y < bufH; y += 1) {
|
|
var brow = (y % matrixSize) * matrixSize;
|
|
for (var x = 0; x < bufW; x += 1) {
|
|
var th = bayer[brow + (x % matrixSize)];
|
|
var i = (y * bufW + x) * 4;
|
|
var vr = 0.5 + (srcData[i] / 255 - 0.5) * contrast;
|
|
var vg = 0.5 + (srcData[i + 1] / 255 - 0.5) * contrast;
|
|
var vb = 0.5 + (srcData[i + 2] / 255 - 0.5) * contrast;
|
|
var qr = Math.floor(vr * L1 + th) / L1;
|
|
var qg = Math.floor(vg * L1 + th) / L1;
|
|
var qb = Math.floor(vb * L1 + th) / L1;
|
|
qr = qr < 0 ? 0 : qr > 1 ? 1 : qr;
|
|
qg = qg < 0 ? 0 : qg > 1 ? 1 : qg;
|
|
qb = qb < 0 ? 0 : qb > 1 ? 1 : qb;
|
|
// Noise phase is a BINARY luminance threshold, independent
|
|
// of levels: odd level counts put flat mid-gray exactly on
|
|
// a quantization step, which would render the "pure noise"
|
|
// pole as a flat field instead of the Bayer pattern.
|
|
var lum = 0.299 * vr + 0.587 * vg + 0.114 * vb;
|
|
var tone = lum > th ? 1 : 0;
|
|
var dr = bgRgb[0] + (accentRgb[0] - bgRgb[0]) * tone;
|
|
var dg = bgRgb[1] + (accentRgb[1] - bgRgb[1]) * tone;
|
|
var db = bgRgb[2] + (accentRgb[2] - bgRgb[2]) * tone;
|
|
var r = qr * 255 + (dr - qr * 255) * duoMix;
|
|
var g = qg * 255 + (dg - qg * 255) * duoMix;
|
|
var b = qb * 255 + (db - qb * 255) * duoMix;
|
|
r += (srcData[i] - r) * cleanMix;
|
|
g += (srcData[i + 1] - g) * cleanMix;
|
|
b += (srcData[i + 2] - b) * cleanMix;
|
|
out[i] = r;
|
|
out[i + 1] = g;
|
|
out[i + 2] = b;
|
|
out[i + 3] = 255;
|
|
}
|
|
}
|
|
rctx.putImageData(outImage, 0, 0);
|
|
ctx.globalAlpha = fade;
|
|
ctx.drawImage(raster, 0, 0, bufW, bufH, 0, 0, canvas.width, canvas.height);
|
|
ctx.globalAlpha = 1;
|
|
// putImageData reuses the raster canvas as a blit surface;
|
|
// srcData is a detached copy, so the source stays pristine.
|
|
}
|
|
|
|
gsap.set(stage, { opacity: 1, y: "0cqh" });
|
|
|
|
var tl = gsap.timeline({
|
|
paused: true,
|
|
onUpdate: function () {
|
|
paint(tl.time());
|
|
},
|
|
});
|
|
|
|
// Anchor tween: spans the full authored duration so onUpdate
|
|
// (the canvas repaint) fires for every eventful seek in [0, D]
|
|
// and holds keep tl.time() honest.
|
|
tl.to({ t: 0 }, { t: 1, duration: duration, ease: "none" }, 0);
|
|
|
|
// HOLD: truly still (a(t) is constant past the ramp, the source
|
|
// raster never changes).
|
|
|
|
// OUT: optional departure; exit none holds until the frame cuts.
|
|
if (exit === "up") {
|
|
tl.to(stage, { y: "-4cqh", duration: OUT, ease: "power2.in" }, OUT_START);
|
|
tl.to(stage, { opacity: 0, duration: OUT, ease: "power2.in" }, OUT_START);
|
|
} else if (exit === "fade") {
|
|
tl.to(stage, { opacity: 0, duration: OUT, ease: "power2.in" }, OUT_START);
|
|
}
|
|
|
|
tl.seek(0);
|
|
paint(0);
|
|
window.__timelines = window.__timelines || {};
|
|
window.__timelines["ordered-dither-pass"] = tl;
|
|
})();
|
|
</script>
|
|
</div>
|
|
</template>
|
|
</body>
|
|
</html>
|
|
```
|
|
|
|
</Accordion>
|
|
|
|
{/* hf:generated-footer */}
|
|
|
|
Tagged `motion-primitive` `experiment` `texture` `dither` `transition` `quantize`.
|
|
|
|
## Related topics
|
|
|
|
- [Browse the complete Catalog](/catalog)
|
|
- [Add assets and Catalog items in Studio](/studio/assets-and-blocks)
|
|
- [Build a richer composition](/go-further)
|