flickr样式调整intactment_fu
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20-09-2019 - |
题
我希望Attachment_fu以与Flickr,Facebook和Twitter的处理方式相似的方式调整我的缩略图:如果我希望100x100缩略图,我希望缩略图完全100x100,并保留了多余的裁剪,以保留纵横比。
有任何想法吗?
解决方案 4
我的解决方案是深入探究attactment_fu插件文件夹(供应商/插件),并编辑rmagick_processor.rb文件。首先,我将resize_image重命名为resize_image_internal,然后添加:
def resize_image(img, size)
# resize_image take size in a number of formats, we just want
# Strings in the form of "square: WxH"
if (size.is_a?(String) && size =~ /^square: (\d*)x(\d*)/i) ||
(size.is_a?(Array) && size.first.is_a?(String) &&
size.first =~ /^square: (\d*)x(\d*)/i)
iw, ih = img.columns, img.rows
aspect = iw.to_f / ih.to_f
if aspect > 1
shave_off = (iw - ih) / 2
img.shave!(shave_off, 0)
else
shave_off = (ih-iw) / 2
img.shave!(0, shave_off)
end
resize_image_internal(img, "#{$1}x#{$2}!")
else
resize_image_internal(img, size) # Otherwise let attachment_fu handle it
end
end
现在,我可以将“正方形:100x100”用作几何字符串。请注意,上面的代码假定所需的输出为正方形。
其他提示
要设置100x100缩略图,请添加以下内容:
has_attachment :content_type => :image,
:storage => IMAGE_STORAGE,
:max_size => 20.megabytes,
:thumbnails => {
:thumb => '100x100>',
:large => '800x600>',
}
(在此示例中,我正在创建一个100x100缩略图,也是800x600“大”尺寸,除了保持原始尺寸外。)
另外,请记住,缩略图可能不完全是100x100;它的最大尺寸为100x100。这意味着,如果原件具有4:3的方面评分,则缩略图为100x75。我不确定这是否是您的意思,“正好有100x100,多余的裁剪,以保留纵横比”。
将其添加到您的模型中
protected
# Override image resizing method
def resize_image(img, size)
# resize_image take size in a number of formats, we just want
# Strings in the form of "crop: WxH"
if (size.is_a?(String) && size =~ /^crop: (\d*)x(\d*)/i) ||
(size.is_a?(Array) && size.first.is_a?(String) &&
size.first =~ /^crop: (\d*)x(\d*)/i)
img.crop_resized!($1.to_i, $2.to_i)
# We need to save the resized image in the same way the
# orignal does.
self.temp_path = write_to_temp_file(img.to_blob)
else
super # Otherwise let attachment_fu handle it
end
end
并将缩略图大小更改为:
:thumbnails => {:thumb => 'crop: 100x100' }
资源:
http://stuff-things.net/2008/02/21/quick-and-dirty-cropping-images-images-with-attachment_fu/
规格中可以给出一个种植指令:
has_attachment :content_type => :image,
:thumbnails => {
:thumb => '100x100#'
}
memonic:'#'看起来像农作物工具。
编辑: 更正
has_attachment :content_type => :image,
:thumbnails => {
:thumb => '100x100!'
}
先前的方法是用于纸条,其符号不同。
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