Question

我基本上想要做的是使用jcrop裁剪图像，然后使用这些尺寸，旋转图像-30deg并保存缩略图。然而rmagick创建了额外的像素，因为旋转后没有涉及缩放。我想知道如何实现这一点。

# 150 x 150 is the final cropped image I want for my thumb(nails)
# :croppable is a file I use that takes the original and adds white padding in a 1200x1200
# file size so I can actually crop with white space available (you can't crop outside the
# original dimensions of the file)

has_attached_file :photo, :styles => {
    :thumb => { :geometry => "150x150#", :format => :jpg, :processors => [:cropper] },
    :general => ["150x375", :jpg],
    :show => ["x425", :jpg],
    :croppable => ["1200x1200>", :jpg]
    },
    :url  => "/assets/w/:style/:w",
    :path => ":rails_root/public:url",
    :default_url => ":w_default",
    :default_path => ":rails_root/public:w",
    :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 -interlace Plane -unsharp 0.3x0.3+5+0'
    },
    :processors => [:thumbnail, :compression]

我最终想要做的是通过css变换旋转预览图像，以便预览实际显示裁剪后缩略图的样子。在这一点上，我不知道如何在回形针保存缩略图并旋转它时获得我想要的东西。

Answer 1

找不到答案。我最终转向Carrierwave并遇到另一组问题，我终于找到了解决方案。太糟糕Carrierwave没有记录图像的处理，但这是一个很小的代价。

Carrierwave RMagick not removing transparency in convert to jpg
Carrierwave +repage option not working

rmagick旋转并调整大小以适合回形针中的指定尺寸

1 个答案: