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YAPF/extensions/photoshop
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Filename Latest commit message Latest commit date
Nexoniarz 2ca726e3af YAPF v1: fast byte-aligned format, SIMD, tools and plugins 
Format (version 1, replaces the earlier experimental versions):
- per-tile YCoCg-R or subtract-green colour transform, 8-bit modular
- 12 row filters per 8-row band (Left, Gradient, Up-right, Up-average,
  Up 1-8 rows), none with more than a one-add serial dependency
- residuals in groups of 8 at the group's width (w bits x 8 = w bytes),
  4-bit control codes with repeat-previous-width runs chosen by DP
- constant and stored tiles, independent 64x64 tiles, mips, GPU hints
- all sizes validated before decoding; corrupt input is rejected

Library:
- SIMD on by default: SSSE3 (runtime CPUID check; GCC, Clang, MSVC,
  MinGW) and NEON on ARM64; -DYAPF_NO_SIMD for plain C
- yapf_load_memory, yapf_load_mt, yapf_load_memory_mt
- 6-10x faster decoding than PNG (stb_image) on one core; -O2 and -O3
  builds perform the same
- fixes for macOS (sysconf) and the Windows import library exports

Tools and integrations:
- `yapf` CLI: convert PNG/JPG/TGA/BMP/PSD/GIF <-> YAPF, info, bench,
  thumbnail, mips
- JavaScript and Python bindings (byte-identical to the C encoder)
- GIMP 3 plugin: exports the flattened image, optional mipmaps
- Blender extension: import (also as plane), export, drag and drop
- VS Code preview, Figma plugin, Photoshop scripts, Linux MIME type and
  thumbnailer
- Makefile, updated build.sh / build.bat, tools/build_release.sh
- tests/test_yapf.c (784 checks) and bindings/js/test.js

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
2026-10-03 14:17:59 +02:00
..
Open YAPF.jsx YAPF v1: fast byte-aligned format, SIMD, tools and plugins 2026-10-03 14:17:59 +02:00
README.md YAPF v1: fast byte-aligned format, SIMD, tools and plugins 2026-10-03 14:17:59 +02:00
Save as YAPF.jsx YAPF v1: fast byte-aligned format, SIMD, tools and plugins 2026-10-03 14:17:59 +02:00
yapf_common.jsxinc YAPF v1: fast byte-aligned format, SIMD, tools and plugins 2026-10-03 14:17:59 +02:00

README.md

YAPF for Photoshop

Two scripts that appear under File → Scripts:

  • Open YAPF — opens one or more .yapf files as documents.
  • Save as YAPF — saves the visible image of the active document (a flattened 8-bit copy; your document is not changed), keeping transparency, with an optional mip chain.

They convert through the yapf command-line tool, so Photoshop needs no native plugin.

Install

  1. Download yapf-<your platform>.zip from the Releases (or build the tool: make → build/yapf).
  2. Copy Open YAPF.jsx, Save as YAPF.jsx, yapf_common.jsxinc and yapf / yapf.exe into Photoshop's scripts folder:
    • Windows: C:\Program Files\Adobe\Adobe Photoshop <version>\Presets\Scripts
    • macOS: /Applications/Adobe Photoshop <version>/Presets/Scripts
  3. Restart Photoshop. The scripts are under File → Scripts; you can give them keyboard shortcuts in Edit → Keyboard Shortcuts or record them in Actions.

Instead of copying yapf next to the scripts you can put it on your PATH.

Status

The scripts are written for Photoshop CC's ExtendScript and are not yet tested inside Photoshop (the converter itself is fully tested). A native format plugin (.8bi / .plugin, so .yapf shows up directly in the Open and Save dialogs) needs Adobe's Photoshop SDK and is planned.