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Scour - An SVG Optimizer / Cleaner
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Niels Thykier cae0faefa0 Avoid O(n²) in removeDuplicateGradient (#171) 
The original implementation of removeDuplicateGradient does O(n²)
search over all gradients to remove duplicates.  In images with many
gradients (such as [MediaWiki_logo_1.svg]), this becomes a significant
overhead as that logo has over 900 duplicated gradients.

We solve this by creating a key for each gradient based on the
attributes we use for duplication detection.  This key is generated
such that if two gradients have the same key, they are duplicates (for
our purpose) and the keys are different then the gradients are
guaranteed to be different as well.  With such a key, we can rely on a
dict to handle the duplication detection (which it does very well).

This change improves the runtime performance on [MediaWiki_logo_1.svg]
by about 25% (8m51s -> 1m56s on 5 runs).

Signed-off-by: Niels Thykier <niels@thykier.net>
2018-03-10 15:47:29 +01:00
scour Avoid O(n²) in removeDuplicateGradient (#171) 2018-03-10 15:47:29 +01:00
unittests tests: Add unit tests for preservation of quotes in CSS styles 2017-09-03 18:07:27 +02:00
.gitignore initial source import (v0.26) and packaging 2013-10-22 16:31:42 +02:00
.travis.yml Add sudo: false to .travis.yml for faster execution of jobs 2017-02-19 18:06:57 +01:00
CONTRIBUTING.md Add CONTRIBUTING.md with some (hopefully) useful pointers 2016-09-18 22:36:21 +02:00
HISTORY.md Fix typo in HISTORY.md 2018-03-10 13:36:49 +01:00
LICENSE initial source import (v0.26) and packaging 2013-10-22 16:31:42 +02:00
Makefile Update Makefile 2016-09-17 17:09:35 +02:00
README.md Update project description and use in both, README.md and setup.py 2017-08-06 04:38:33 +02:00
scour.sublime-project initial source import (v0.26) and packaging 2013-10-22 16:31:42 +02:00
setup.py make flake8 happier 2017-08-06 04:55:43 +02:00
testcss.py Some whitespace fixes to make newer versions of flake8 happy 2016-11-27 18:52:39 +01:00
testscour.py Catch specific exception rather than anything 2018-02-17 11:47:36 +01:00
tox.ini Add Python 3.6 to tests and simplify .travis.yml by using 'tox-travis' 2017-02-19 18:04:36 +01:00

README.md

Scour

PyPI   Build status Codecov

Scour is an SVG optimizer/cleaner that reduces the size of scalable vector graphics by optimizing structure and removing unnecessary data written in Python.

It can be used to create streamlined vector graphics suitable for web deployment, publishing/sharing or further processing.

The goal of Scour is to output a file that renderes identically at a fraction of the size by removing a lot of redundant information created by most SVG editors. Optimization options are typically lossless but can be tweaked for more agressive cleaning.

Scour is open-source and licensed under Apache License 2.0.

Scour was originally developed by Jeff "codedread" Schiller and Louis Simard in in 2010. The project moved to GitLab in 2013 an is now maintained by Tobias "oberstet" Oberstein and Eduard "Ede_123" Braun.

Installation

Scour requires Python 2.7 or 3.3+. Further, for installation, pip should be used.

To install the latest release of Scour from PyPI:

pip install scour

To install the latest trunk version (which might be broken!) from GitHub:

pip install https://github.com/codedread/scour/archive/master.zip

Usage

Standard:

scour -i input.svg -o output.svg

Better (for older versions of Internet Explorer):

scour -i input.svg -o output.svg --enable-viewboxing

Maximum scrubbing:

scour -i input.svg -o output.svg --enable-viewboxing --enable-id-stripping \
  --enable-comment-stripping --shorten-ids --indent=none

Maximum scrubbing and a compressed SVGZ file:

scour -i input.svg -o output.svgz --enable-viewboxing --enable-id-stripping \
  --enable-comment-stripping --shorten-ids --indent=none