Closed
Description
Hi!
Is it possible to thumbnail or scale images with the --size argument described here
https://jcupitt.github.io/libvips/API/current/Using-vipsthumbnail.md.html
and here
https://github.com/jcupitt/libvips/issues/781 ?
Right now I am seeing something strange with the #thumbnail-method. Basically I have a 600x647 image that I want to scale down to a width of 100 (I do not care about height).
image = Vips::Image.new_from_file(stored_image.file.path)
=> #<Image 600x647 uchar, 4 bands, srgb>
image = image.thumbnail_image(100)
VIPS-INFO: selected loader is image source
VIPS-INFO: input size is 600 x 647
VIPS-INFO: converting to processing space srgb
VIPS-INFO: premultiplying alpha
VIPS-INFO: shrinkv by 3
VIPS-INFO: shrinkh by 3
VIPS-INFO: residual reducev by 0.463679
VIPS-INFO: reducev: 14 point mask
VIPS-INFO: residual reduceh by 0.463679
VIPS-INFO: reduceh: 14 point mask
VIPS-INFO: unpremultiplying alpha
=> #<Image 93x100 uchar, 4 bands, srgb>
image = image.thumbnail_image(100, height: 108)
VIPS-INFO: selected loader is image source
VIPS-INFO: input size is 93 x 100
VIPS-INFO: converting to processing space srgb
VIPS-INFO: premultiplying alpha
VIPS-INFO: residual scale 1.07527 x 1.07527
VIPS-INFO: unpremultiplying alpha
=> #<Image 100x108 uchar, 4 bands, srgb>I think I understand the reason why #thumbnail_image(100) does not have a width of 100, and it is because it is interpreted as a box of 100x100, and then Vips will try to satisfy that.
So I guess what I want is to pass 100x (as discussed in the Github issue), but is there any way to achieve that?