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Carrierwave - 将图像大小调整为固定宽度

发布于 2024-12-22 04:28:48 字数 95 浏览 4 评论 0原文

我正在使用 RMagick，希望将图像大小调整为 100px 的固定宽度，并按比例缩放高度。例如，如果用户要上传 300x900 像素，我希望将其缩放到 100x300 像素。

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是你 2024-12-29 04:28:48

只需将其放入您的上传文件中：

class ImageUploader < CarrierWave::Uploader::Base

  version :resized do
    # returns an image with a maximum width of 100px 
    # while maintaining the aspect ratio
    # 10000 is used to tell CW that the height is free 
    # and so that it will hit the 100 px width first
    process :resize_to_fit => [100, 10000]
  end

end

此处的文档和示例：http://www.imagemagick.org/RMagick/doc/image3.html#resize_to_fit" imagemagick.org/RMagick/doc/image3.html#resize_to_fit

请记住，如果图像小于 100 像素，resize_to_fit 将放大图像。如果您不希望它这样做，请将其替换为 resize_to_limit。

Just put this in your uploader file:

class ImageUploader < CarrierWave::Uploader::Base

  version :resized do
    # returns an image with a maximum width of 100px 
    # while maintaining the aspect ratio
    # 10000 is used to tell CW that the height is free 
    # and so that it will hit the 100 px width first
    process :resize_to_fit => [100, 10000]
  end

end

Documentation and example here: http://www.imagemagick.org/RMagick/doc/image3.html#resize_to_fit

Keep in mind, resize_to_fit will scale up images if they are smaller than 100px. If you don't want it to do that, then replace that with resize_to_limit.

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酷遇一生 2024-12-29 04:28:48

我使用

process :resize_to_fit => [100, 10000]

10000 或任何非常大的数字让 Carrierwave 知道高度是自由的，只需调整宽度即可。

@iWasRobbed：我认为这不是正确的解决方案。根据您粘贴的有关resize_to_fit的链接：调整大小后的图像的最大高度。如果省略，则默认为 new_width 的值。 因此，在您的情况下 process :resize_to_fit => [100, nil] 相当于 process :resize_to_fit => [100, 100] 这并不能保证您始终获得 100px 的固定宽度

I use

process :resize_to_fit => [100, 10000]

Use 10000 or any very big number to let Carrierwave know the height is free, just resize to the width.

@iWasRobbed: I don't think that's the correct solution. According to the link you pasted about resize_to_fit: The maximum height of the resized image. If omitted it defaults to the value of new_width. So in your case process :resize_to_fit => [100, nil] is equivalent to process :resize_to_fit => [100, 100] which doesn't guarantee that you will always get the fixed width of 100px

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