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View Code? Open in Web Editor NEWflexible and easy to use ruby gem for image processing
Home Page: http://tario.github.com/imageruby/doc/
License: GNU General Public License v3.0
flexible and easy to use ruby gem for image processing
Home Page: http://tario.github.com/imageruby/doc/
License: GNU General Public License v3.0
= ImageRuby - flexible ruby gem for image processing ImageRuby is a gem for image processing written in pure ruby, this makes the library very portable and easy to install Also, the gem was desgined to accept extensions like: * new format decoders made from scratch (Ruby or C) * new format decoders based on existent C libraries like libpng, libbmp, etc... * new image operations (Ruby or C) * re-implementations of parts in C to improve performance on environments where it is possible == Installation === Gem installation sudo gem install imageruby == Documentation Full API documentation can be found on: http://tario.github.com/imageruby/doc/ == Examples NOTE: Examples loads and saves bitmap files, imageruby-bmp gem must be installed in order to get the examples work === Create and save a black image require "rubygems" require "imageruby" include ImageRuby # creates an image of 150x150 pixels filled with black image = ImageRuby::Image.new(150,150, Color.black) begin # this only work if imageruby-bmp gem is installed image.save("black.bmp", :bmp) rescue print "Error while trying to save, you must install imageruby-bmp gem" end === Create an image with vertical stripes filled with default named colors require "rubygems" require "imageruby" include ImageRuby print "list of named colors:\n" print "--------------------------\n" colors = Array.new Color.named_colors.each do |name, color| print "#{name}: #{color.inspect}\n" colors << color end image = Image.new( colors.count * 32, 512) x = 0 colors.each do |color| image[x..x+31, 0..511] = Image.new(32,512,color) x = x + 32 end image.save("colors.bmp", :bmp) === Gradient using block parameter require "rubygems" require "imageruby" include ImageRuby gradient_images = Array.new gradient_images << Image.new(64,64) {|x,y| Color.from_rgb(x*4,y*4,0) } gradient_images << Image.new(64,64) {|x,y| Color.from_rgb(0,x*4,y*4) } gradient_images << Image.new(64,64) {|x,y| Color.from_rgb(y*4,0,x*4) } (0..gradient_images.count-1).each do |i| gradient_images[i].save("gradient#{i}.bmp", :bmp) end all_gradient = Image.new(96*gradient_images.count, 96) (0..gradient_images.count-1).each do |i| all_gradient.draw!(i*96+16, 16, gradient_images[i]) end all_gradient.save("gradients.bmp", :bmp) === Draw with mask require "rubygems" require "imageruby" include ImageRuby colors = Image.from_file("colors.bmp") gradients = Image.from_file("gradients.bmp") without_mask = colors.draw(128,192,gradients) without_mask.save("without_mask.bmp", :bmp) with_mask = colors.draw(128,192,gradients.mask(Color.black)) with_mask.save("with_mask.bmp", :bmp) === Draw with transparency effects require "rubygems" require "imageruby" include ImageRuby colors = Image.from_file("colors.bmp") gradients = Image.from_file("gradients.bmp") transparent_black = Color.black transparent_black.a = 128 colors.draw(128,192,gradients.color_replace(Color.black, transparent_black)).save("sample1.bmp", :bmp) half_transparent = gradients.map_pixel{ |x,y,c| c.a = 128 if x >144 c } colors.draw(128,192,half_transparent).save("sample2.bmp", :bmp) == Copying Copyright (c) 2011 Dario Seminara, released under the GPL License (see LICENSE)
$ ruby gradient.rb
/home/railsdev1/.rvm/gems/ruby-1.9.3-p385@default/gems/imageruby-0.2.3/lib/imageruby/pureruby.rb:156:in <': comparison of String with 255 failed (ArgumentError) from /home/railsdev1/.rvm/gems/ruby-1.9.3-p385@default/gems/imageruby-0.2.3/lib/imageruby/pureruby.rb:156:in
block (2 levels) in draw!'
from /home/railsdev1/.rvm/gems/ruby-1.9.3-p385@default/gems/imageruby-0.2.3/lib/imageruby/pureruby.rb:151:in each' from /home/railsdev1/.rvm/gems/ruby-1.9.3-p385@default/gems/imageruby-0.2.3/lib/imageruby/pureruby.rb:151:in
block in draw!'
from /home/railsdev1/.rvm/gems/ruby-1.9.3-p385@default/gems/imageruby-0.2.3/lib/imageruby/pureruby.rb:145:in each' from /home/railsdev1/.rvm/gems/ruby-1.9.3-p385@default/gems/imageruby-0.2.3/lib/imageruby/pureruby.rb:145:in
draw!'
from gradient.rb:27:in block in <main>' from gradient.rb:26:in
each'
from gradient.rb:26:in `
This project is very exciting to me, as I maintain a popular gem called lolcommits which I would love to move off using RMagick/ImageMagick, as the vast majority of the installation problems people have come from trying to get IM installed and working, so a pure Ruby/gem solution would be ideal.
Are there any plans on the roadmap to add image compositing or font to image capabilities to imageruby?
( had been tracking this on my side at lolcommits/lolcommits#24 )
Hi,
I've been trying to find a ruby gem which I can use to resize images and that won't require the user to install any additional software.
Is it possible to do it with imageruby?
This code fails:
require 'ImageRuby'
include ImageRuby
activeSprite = Image.new(12,12, Color.blue)
img = Image.new(128, 12, Color.coerce("#a8a8a8"))
img.draw!(0,0, activeSprite)
Backtrace:
ArgumentError: invalid byte sequence in UTF-8
from /usr/local/xxxxxxxxx/ruby/2.0.0-p247/lib/ruby/gems/2.0.0/gems/imageruby-0.2.4/lib/imageruby/pureruby.rb:154:in `ord'
from /usr/local/xxxxxxxxx/ruby/2.0.0-p247/lib/ruby/gems/2.0.0/gems/imageruby-0.2.4/lib/imageruby/pureruby.rb:154:in `block (2 levels) in draw!'
from /usr/local/xxxxxxxxx/ruby/2.0.0-p247/lib/ruby/gems/2.0.0/gems/imageruby-0.2.4/lib/imageruby/pureruby.rb:151:in `each'
from /usr/local/xxxxxxxxx/ruby/2.0.0-p247/lib/ruby/gems/2.0.0/gems/imageruby-0.2.4/lib/imageruby/pureruby.rb:151:in `block in draw!'
from /usr/local/xxxxxxxxx/ruby/2.0.0-p247/lib/ruby/gems/2.0.0/gems/imageruby-0.2.4/lib/imageruby/pureruby.rb:145:in `each'
from /usr/local/xxxxxxxxx/ruby/2.0.0-p247/lib/ruby/gems/2.0.0/gems/imageruby-0.2.4/lib/imageruby/pureruby.rb:145:in `draw!'
from (irb):5
from /usr/local/bin/irb:12:in `<main>
Color.transparent should be same as Color.rgba(0,0,0,0)
RubyGems.org doesn't report a license for your gem. This is because it is not specified in the gemspec of your last release.
via e.g.
spec.license = 'MIT'
# or
spec.licenses = ['MIT', 'GPL-2']
Including a license in your gemspec is an easy way for rubygems.org and other tools to check how your gem is licensed. As you can imagine, scanning your repository for a LICENSE file or parsing the README, and then attempting to identify the license or licenses is much more difficult and more error prone. So, even for projects that already specify a license, including a license in your gemspec is a good practice. See, for example, how rubygems.org uses the gemspec to display the rails gem license.
There is even a License Finder gem to help companies/individuals ensure all gems they use meet their licensing needs. This tool depends on license information being available in the gemspec. This is an important enough issue that even Bundler now generates gems with a default 'MIT' license.
I hope you'll consider specifying a license in your gemspec. If not, please just close the issue with a nice message. In either case, I'll follow up. Thanks for your time!
Appendix:
If you need help choosing a license (sorry, I haven't checked your readme or looked for a license file), GitHub has created a license picker tool. Code without a license specified defaults to 'All rights reserved'-- denying others all rights to use of the code.
Here's a list of the license names I've found and their frequencies
p.s. In case you're wondering how I found you and why I made this issue, it's because I'm collecting stats on gems (I was originally looking for download data) and decided to collect license metadata,too, and make issues for gemspecs not specifying a license as a public service :). See the previous link or my blog post about this project for more information.
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