From adbdf85b0e41801d23bef60bdc9e63353a3b700a Mon Sep 17 00:00:00 2001 From: Alek Ratzloff Date: Tue, 21 May 2024 11:54:15 -0700 Subject: [PATCH] initial commit Signed-off-by: Alek Ratzloff --- .gitignore | 192 ++++++++++++++++++++++++++++++++++++++++++ colorhash/__main__.py | 114 +++++++++++++++++++++++++ 2 files changed, 306 insertions(+) create mode 100644 .gitignore create mode 100644 colorhash/__main__.py diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..ffb5112 --- /dev/null +++ b/.gitignore @@ -0,0 +1,192 @@ +### Python ### +# Byte-compiled / optimized / DLL files +__pycache__/ +*.py[cod] +*$py.class + +# C extensions +*.so + +# Distribution / packaging +.Python +build/ +develop-eggs/ +dist/ +downloads/ +eggs/ +.eggs/ +lib/ +lib64/ +parts/ +sdist/ +var/ +wheels/ +share/python-wheels/ +*.egg-info/ +.installed.cfg +*.egg +MANIFEST + +# PyInstaller +# Usually these files are written by a python script from a template +# before PyInstaller builds the exe, so as to inject date/other infos into it. +*.manifest +*.spec + +# Installer logs +pip-log.txt +pip-delete-this-directory.txt + +# Unit test / coverage reports +htmlcov/ +.tox/ +.nox/ +.coverage +.coverage.* +.cache +nosetests.xml +coverage.xml +*.cover +*.py,cover +.hypothesis/ +.pytest_cache/ +cover/ + +# Translations +*.mo +*.pot + +# Django stuff: +*.log +local_settings.py +db.sqlite3 +db.sqlite3-journal + +# Flask stuff: +instance/ +.webassets-cache + +# Scrapy stuff: +.scrapy + +# Sphinx documentation +docs/_build/ + +# PyBuilder +.pybuilder/ +target/ + +# Jupyter Notebook +.ipynb_checkpoints + +# IPython +profile_default/ +ipython_config.py + +# pyenv +# For a library or package, you might want to ignore these files since the code is +# intended to run in multiple environments; otherwise, check them in: +# .python-version + +# pipenv +# According to pypa/pipenv#598, it is recommended to include Pipfile.lock in version control. +# However, in case of collaboration, if having platform-specific dependencies or dependencies +# having no cross-platform support, pipenv may install dependencies that don't work, or not +# install all needed dependencies. +#Pipfile.lock + +# poetry +# Similar to Pipfile.lock, it is generally recommended to include poetry.lock in version control. +# This is especially recommended for binary packages to ensure reproducibility, and is more +# commonly ignored for libraries. +# https://python-poetry.org/docs/basic-usage/#commit-your-poetrylock-file-to-version-control +#poetry.lock + +# pdm +# Similar to Pipfile.lock, it is generally recommended to include pdm.lock in version control. +#pdm.lock +# pdm stores project-wide configurations in .pdm.toml, but it is recommended to not include it +# in version control. +# https://pdm.fming.dev/#use-with-ide +.pdm.toml + +# PEP 582; used by e.g. github.com/David-OConnor/pyflow and github.com/pdm-project/pdm +__pypackages__/ + +# Celery stuff +celerybeat-schedule +celerybeat.pid + +# SageMath parsed files +*.sage.py + +# Environments +.env +.venv +env/ +venv/ +ENV/ +env.bak/ +venv.bak/ + +# Spyder project settings +.spyderproject +.spyproject + +# Rope project settings +.ropeproject + +# mkdocs documentation +/site + +# mypy +.mypy_cache/ +.dmypy.json +dmypy.json + +# Pyre type checker +.pyre/ + +# pytype static type analyzer +.pytype/ + +# Cython debug symbols +cython_debug/ + +# PyCharm +# JetBrains specific template is maintained in a separate JetBrains.gitignore that can +# be found at https://github.com/github/gitignore/blob/main/Global/JetBrains.gitignore +# and can be added to the global gitignore or merged into this file. For a more nuclear +# option (not recommended) you can uncomment the following to ignore the entire idea folder. +#.idea/ + +### Python Patch ### +# Poetry local configuration file - https://python-poetry.org/docs/configuration/#local-configuration +poetry.toml + +# ruff +.ruff_cache/ + +# LSP config files +pyrightconfig.json + +### Vim ### +# Swap +[._]*.s[a-v][a-z] +!*.svg # comment out if you don't need vector files +[._]*.sw[a-p] +[._]s[a-rt-v][a-z] +[._]ss[a-gi-z] +[._]sw[a-p] + +# Session +Session.vim +Sessionx.vim + +# Temporary +.netrwhist +*~ +# Auto-generated tag files +tags +# Persistent undo +[._]*.un~ diff --git a/colorhash/__main__.py b/colorhash/__main__.py new file mode 100644 index 0000000..dac5dbf --- /dev/null +++ b/colorhash/__main__.py @@ -0,0 +1,114 @@ +import hashlib +import sys + + +# TODO - WASM compile for embedding directly in HTML +# TODO - command line parsing for hash type, infile, forcing a palette, etc +# TODO - file streaming for infile so we aren't loading e.g. 4GB into memory unnecessarily + + +def hash2matrix(data: bytes, w: int, h: int) -> list[list[int]]: + """ + Convert a hash to a list of rows of nibbles. + """ + # Split the data into nibbles first, in case the width is an odd number + nibbles = [] + for b in data: + top = (b & 0xF0) >> 4 + bottom = b & 0x0F + nibbles += [top, bottom] + + if len(nibbles) != w * h: + raise ValueError( + f"input data length ({len(nibbles)}) must match matrix dimensions ({w}x{h} = {w * h})" + ) + + cols = [] + row = [] + for b in nibbles: + row += [b] + if len(row) == w: + cols += [row] + row = [] + + return cols + + +def gensvg(matrix: list[list[int]], square_size: int = 32): + h = len(matrix) + w = len(matrix[0]) + + # Start SVG string + svg = f'\n' + + # Generate grid + for r in range(h): + for c in range(w): + x = c * square_size + y = r * square_size + color = matrix[r][c] + svg += f' \n' + + # Close SVG string + svg += "" + return svg + + +color_table = [ + # red + [f"#{0x110000 * i:06x}" for i in range(0x10)], + # green + [f"#{0x001100 * i:06x}" for i in range(0x10)], + # blue + [f"#{0x000011 * i:06x}" for i in range(0x10)], + # black + [f"#{0x111111 * i:06x}" for i in range(0x10)], + # cyan + [f"#{0x001111 * i:06x}" for i in range(0x10)], + # yellow + [f"#{0x111100 * i:06x}" for i in range(0x10)], + # magenta + [f"#{0x110011 * i:06x}" for i in range(0x10)], + # white + [f"#{0x111111 * (0xF - i):06x}" for i in range(0x10)], +] + +dimensions_table = { + "md5": (8, 4), + "sha1": (8, 5), + "sha224": (8, 7), + "sha256": (8, 8), + "sha384": (12, 8), + "sha512": (16, 8), +} + + +hash_algo = "sha512" + +infile = sys.stdin.buffer + + +if len(sys.argv) > 1: + inpath = sys.argv[1] + if inpath != '-': + infile = open(inpath, 'rb') + + +hashdata = hashlib.file_digest(infile, hash_algo).digest() +w, h = dimensions_table[hash_algo] +matrix = hash2matrix(hashdata, w, h) + +# Print matrix +# pprint.pprint([[hex(c) for c in row] for row in matrix]) + +palette_no = sum(hashdata) % 8 +# print('using palette:', palette_no) +palette = color_table[palette_no] + +colors = [[palette[v] for v in row] for row in matrix] + +# Print colors +# pprint.pprint([[hex(c) for c in row] for row in colors]) + +# Print SVG +print(gensvg(colors))