我正在遵循 jcrop Rails 教程,但遇到了障碍。归根结底是回形针正在从原始文件生成缩略图,但我需要它从另一种样式生成。原始文件的产品照片和文档边缘之间没有任何空格。因此我无法进一步裁剪。为了解决这个问题,我制作了另一种具有白色像素填充的样式。这就是我想要生成缩略图的内容。
# croppable is the one with the padding...it's what shows up in the crop view.
# I want :thumb to be generated from THAT style, not :original.
# When generating from :original, the crop offset/size is screwed because the dimensions of :original don't match :cropped
# and I can't crop beyond the pixel dimensions of :original.
has_attached_file :photo, :styles => {
:thumb => { :geometry => "300x300#", :format => :jpg, :processors => [:cropper] },
:general => ["150x375", :jpg],
:show => ["x425", :jpg],
:croppable => ["1200x1200>", :jpg]
},
:url => "/assets/wines/:style/:wine_name",
:path => ":rails_root/public:url",
:default_url => ":wine_default",
:default_path => ":rails_root/public:wine_default",
:default_style => :show,
:convert_options => {
:thumb => '-gravity center -rotate -30',
:croppable => '-gravity center -extent 1200x1200',
:general => '-gravity center -extent 150x375 -quality 95',
:all => '-quality 100 -antialias -flatten -background white -unsharp 0.3x0.3+5+0'
},
:processors => [:thumbnail, :compression]
最佳答案
我在网上发现了一个别人制作的处理器并为自己使用。详情可查看http://pjkh.com/articles/speeding-up-thumbnail-generation-with-paperclip/获取高级使用信息。
recursive_thumbnail.rb(包含在 lib/paperclip_processors 中)
module Paperclip
class RecursiveThumbnail < Thumbnail
def initialize file, options = {}, attachment = nil
super Paperclip.io_adapters.for(attachment.styles[options[:thumbnail] || :original]), options, attachment
end
end
end
对于您的模型:
:styles => {
:croppable => ["1200x1200>", :jpg],
:show => ["x425", :jpg],
:general => ["150x375", :jpg],
:thumb => {
:geometry => "150x150^",
:format => :jpg,
:processors => [:recursive_thumbnail] },
:thumbnail => :croppable
}
关于ruby-on-rails - Rails 回形针从其他样式生成缩略图,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/19556993/