# saket/telephoto

Building blocks for designing media experiences in Compose UI

Repository: https://github.com/saket/telephoto
Canonical: https://ross.abutalabs.com/products/telephoto
Homepage: https://saket.github.io/telephoto/
Language: Kotlin
License: Apache-2.0
License Family: permissive
Topics: compose, image, sub-sampling, zoom, android, zoomable, subsampling
Last push: 2026-07-22T17:59:36+00:00

## Health v2 (maintenance only)
Score: 79/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 93, release rhythm 53, longevity 94
- inputs: {"age_days": 1316, "days_push": 42, "days_rel": 153, "gap_med": 93.0, "n_releases_24m": 7}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1549, forks 54 (observed 2026-08-28T04:05:01.984194+00:00)

## What it is
Telephoto is a Kotlin library providing building blocks for designing media experiences in Jetpack Compose UI on Android. It offers a drop-in zoomable Image replacement with sub-sampling for large images, a standalone zoomable Modifier, and an Instagram-style peek overlay effect.

## Use cases
- display zoomable images in a Compose Android app
- pan and zoom large images without running out of memory
- add pinch-to-zoom gestures to videos or custom composables
- build an Instagram-like photo viewer
- replace Image() with a zoomable drop-in equivalent
- implement transient zoom peek effects on media

## When to choose
- you're building an Android app with Jetpack Compose that shows images or media
- you need to display very large images that don't fit in memory
- you want polished pan/zoom gesture behavior without writing it yourself

## When to avoid
- your app doesn't use Jetpack Compose
- you target platforms other than Android
- you only need simple static image display without zoom

## Facets
- artifact type: library
- maturity: active
- function: ui-components, image-processing, animation
- domain: mobile-development, android-tools, media, frontend
- platform: jvm
- tags: jetpack-compose, zoomable-image, sub-sampling, pan-and-zoom, gesture-handling, media-viewer, android

## Member repositories
- saket/telephoto (main) score 79

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:05:01.984194+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T04:30:24.336194+00:00, confidence not recorded.
  - readme: https://github.com/saket/telephoto (fetched 2026-08-28T04:05:01.984194+00:00, sha c5c5b111e4a0)
  - homepage: https://saket.github.io/telephoto/ (fetched 2026-08-29T11:31:05.016617+00:00, sha 5034dc00d79c)
- Data as of 2026-08-30T08:39:29.467469+00:00.