This page contains automated test results for code from O'Reilly's Ruby Cookbook. If this code looks interesting or useful, you might want to buy the whole book.
Thumbnailing Images (written by Antonio Cangiano) | ||
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Code | Expected | Actual |
require 'rubygems' require 'RMagick' img = Magick::Image.read('myimage.jpg').first width, height = 100, 100 thumb = img.resize(width, height) thumb.write('mythumbnail.jpg') scale_factor = 0.15 thumb = img.resize(scale_factor) thumb.write("mythumbnail.jpg") def thumb_no_bigger_than(img, width, height) img.change_geometry("#{width}x#{height}") do |cols, rows, img| img.resize(cols, rows) end end img.rows |
470 | 470 |
img.columns |
892 | 892 |
thumb = thumb_no_bigger_than(img, 100, 100) thumb.rows |
53 | 53 |
thumb.columns |
100 | 100 |
thumb = img.scale(width, height) thumb = img.scale(scale_factor) thumb = img.sample(width, height) thumb = img.sample(scale_factor) thumb = img.thumbnail(width, height) thumb = img.thumbnail(scale_factor) thumb = img.crop(Magick::CenterGravity, 80, 100) |
With an x, y offset relative to the upper-left corner: |
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thumb = img.crop(x, y, width, height) |
With a GravityType and the x, y offset: |
Error! (Exception?) Here's stdout: NameError: undefined local variable or method `x' for main:Object from (irb):27 from :0 |
thumb = img.crop(Magick::WestGravity, x, y, width, height) |
With a GravityType: |
Error! (Exception?) Here's stdout: NameError: undefined local variable or method `x' for main:Object from (irb):28 from :0 |
thumb = img.crop(Magick::EastGravity, width, height) |
myimage.jpg JPEG 892x470=>100x100 892x470+792+185 DirectClass 8-bit 3kb |