mirror of
https://github.com/heygen-com/hyperframes.git
synced 2026-09-01 19:42:03 +00:00
Vance Ingalls
75a34d34e3
Catalog preview script (scripts/generate-catalog-previews.ts) uses demo.html as the component entry point. Missing file caused the Render catalog previews job to fail with "Item not found".
84 lines
2.8 KiB
HTML
Vendored
84 lines
2.8 KiB
HTML
Vendored
<!--
|
|
Blend Difference — auto-inverting captions via mix-blend-mode.
|
|
|
|
Text color inverts per-pixel against whatever is behind it:
|
|
white stays white on dark areas, flips to black on light areas.
|
|
On color video, white inverts to the complement (blue → orange,
|
|
red → cyan, green → magenta).
|
|
|
|
Setup:
|
|
1. The composition root (or a shared ancestor of both the video
|
|
and the caption layer) MUST have `isolation: isolate` so the
|
|
blend operates against sibling content, not the page background.
|
|
2. Add class="blend-difference" to any caption container.
|
|
3. Set caption text color to white. The blend mode handles the rest.
|
|
|
|
Works on any element — divs, spans, SVG text, even images.
|
|
|
|
Customize:
|
|
- --blend-caption-color: base text color (default white)
|
|
- Change blend mode via --blend-mode to 'exclusion' for a softer effect
|
|
|
|
Variants:
|
|
- .blend-difference → standard per-pixel inversion
|
|
- .blend-difference-soft → exclusion mode, less harsh contrast
|
|
- .blend-difference-screen → text glows on dark, fades on light
|
|
-->
|
|
|
|
<style>
|
|
.blend-difference {
|
|
mix-blend-mode: var(--blend-mode, difference);
|
|
color: var(--blend-caption-color, white);
|
|
pointer-events: none;
|
|
}
|
|
|
|
.blend-difference-soft {
|
|
mix-blend-mode: exclusion;
|
|
color: var(--blend-caption-color, white);
|
|
pointer-events: none;
|
|
}
|
|
|
|
.blend-difference-screen {
|
|
mix-blend-mode: screen;
|
|
color: var(--blend-caption-color, white);
|
|
pointer-events: none;
|
|
}
|
|
</style>
|
|
|
|
<!--
|
|
Composition setup example:
|
|
|
|
<div data-composition-id="root" ... style="isolation: isolate;">
|
|
|
|
<video id="bg" data-start="0" data-duration="30" data-track-index="0"
|
|
src="video.mp4" muted playsinline></video>
|
|
|
|
<div class="clip blend-difference" data-start="0" data-duration="5" data-track-index="1"
|
|
style="position: absolute; inset: 0; z-index: 10;
|
|
display: flex; align-items: center; justify-content: center;">
|
|
<span style="font-size: 120px; font-weight: 800; text-transform: uppercase;">
|
|
YOUR CAPTION
|
|
</span>
|
|
</div>
|
|
</div>
|
|
|
|
|
|
Timeline integration — animate captions normally, blend mode is passive:
|
|
|
|
tl.from(".caption", {
|
|
y: 50, opacity: 0, duration: 0.6, ease: "expo.out"
|
|
}, 0.2);
|
|
|
|
|
|
Notes:
|
|
- isolation: isolate on the composition root is REQUIRED.
|
|
Without it, blend mode composes against the page background
|
|
(usually white or black) and you get no inversion.
|
|
- Works with any GSAP animation — the blend composites every frame.
|
|
- For caption containers with multiple text elements, apply the
|
|
class to the shared parent, not each text element individually.
|
|
- On pure black backgrounds, white text stays white (difference
|
|
of white and black = white). The effect is most visible when
|
|
the background has varied luminance or color.
|
|
-->
|