pngdeer

BlazeDiff is an open-source diff ecosystem for JavaScript applications and other runtimes. It provides pixel-perfect image comparison, Rust and SIMD-based native and WebAssembly diff engines, structured image-diff interpretation, object diffing, perceptual metrics including SSIM, MS-SSIM, Hitchhiker's SSIM, and GMSD, and a from-scratch Rust PNG codec. The ecosystem includes JavaScript, Rust, Python, and command-line packages, along with framework-agnostic and React UI components for visualizing differences. Its agentic visual-regression tool discovers routes, captures deterministic screenshots, and sends ambiguous diffs to a coding agent for a verdict.

Glyd is a Rust lossless-compression library and command-line tool with a C ABI, streaming interfaces, and Python and Go bindings. It targets object storage, data lakes, logs, telemetry, backups, versioned exports, RPC payloads, and caches as an alternative to LZ4, Snappy, and zstd. Its record mode detects delimited records, SQL dumps, JSON lines, and varying-shape logs, converts fields or template variables into typed streams, and compresses them in parallel. Base mode compresses a new version against an older version by using regions of the old data as history. The format uses independently decodable blocks and parallel paths; higher levels use separated token, offset, length, and literal streams with SIMD-oriented decoding, while long-distance matching can find repeated content up to 128 MB back. The repository also provides shape dictionaries for small objects, packs for many small objects, container and JPEG handling at selected levels, and a cold context-mixing level for infrequently read data. The separate glyd-store crate and CLI select similar stored objects as delta bases using fingerprints, cap delta chains, and support local directories and S3-compatible backends. The codec, CLI, C ABI, and bindings use the BSD 3-Clause License or GPL-2.0; glyd-store uses the Business Source License 1.1, with commercial production use requiring a license and conversion to Apache-2.0 four years after each release.

desigma is a free, offline, open-source interface-design and whiteboard application written in Rust, with an egui desktop editor and a deterministic CPU renderer based on tiny-skia. It supports frames, vector editing, auto layout, components and variants, variables, prototyping flows, presentations, shared libraries, and whiteboard boards with stickies, shapes, and connectors. It imports Figma REST JSON and .fig files, including components, styles, overrides, images, and prototype interactions, and exports PNG, JPG, SVG, Figma REST JSON, CSS, and code for Tailwind, SwiftUI, Jetpack Compose, and React. The repository also includes an optional local MCP server for inspecting and editing design files and generating code. desigma is in early alpha, with stated gaps including collaboration, plugins, some .fig features, and code-signed releases. It is licensed under MIT or Apache-2.0.

PDF Inspector is an open-source Rust library by Firecrawl for classifying PDF documents and extracting position-aware text without OCR. It samples content streams to classify documents as text-based, scanned, image-based, or mixed, returns confidence scores and per-page OCR-routing information, and detects broken font encodings. Its extractor uses font information and X/Y coordinates to determine reading order, including multi-column and right-to-left layouts, and converts content to Markdown with headings, lists, code blocks, tables, formatting, links, and page breaks. Native Rust and CLI consumers can opt into selective OCR for pages that need it; the Python and Node.js bindings can run the same workflow, while browser WebAssembly provides local parsing without a server round trip. The project also supports CID font decoding and shares a single parsed document between classification and extraction.

Falco is a tiny browser engine written from scratch in Rust. It parses HTML, applies CSS, executes JavaScript in a custom virtual machine with a baseline JIT compiler, loads images, computes layout, and paints the result to a canvas that can be exported as PNG or displayed in a live interactive window. Its rendering pipeline runs from HTML through the DOM, style and layout trees, paint commands, and a canvas; the interactive mode supports scrolling, link navigation, form filling, and browsing history. The project includes its own HTML and CSS parsers, layout engine, SVG renderer, image loader, PNG encoder, WebAssembly interpreter, networking layer, and JavaScript DOM bindings, rather than wrapping WebKit, Gecko, or Chromium.