Hi everyone...
Since i can''t find noob friendly information about rmagick and
fleximage on the web, I''m here offering a beer for the one good soul
who can help me to get rid of my ignorance.
I''ve been trying for weeks to make fleximage to work, and now that it
does, I''d like to do the following:
class MyImage < FlexImage::Model
def fooify!
img = rmagick_image
# retrieve image''s width and height
# compare both values to determine if the image is "portrait" or
"landscap" (if width > height, aspect_ratio = landscape, etc...)
# if image is "portrait", resizes it using a threshold of 200px
height, decreasing the width proportionally.
# else, if it''s landscape, it resizes to a 400px WIDTH, resizing
the height proportionally
# than store the image in a blob or filesystem, and the
aspect_ratio value in the DB
self.rmagick_image = img
self
end
end
My main point of ignorance is about how to gather information about
the image''s width and height.
The rest I think I can figure out myself (but since I took a lot of
time just to make fleximage work, I''m not so confident and I still
apreciate your kindness to share your thoughts on it, specially if you
think that creating a method inside the model isn''t the best aproach
and have better practices in mind)
I would really apreciate some help on this, and if you can do it, I
owe you a couple beers (however, you''ll have to come to brazil to
drink it)
Thank You
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On Mar 24, 4:02 am, Daniel Drehmer <danieldreh...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:> Hi everyone...[snip]> class MyImage < FlexImage::Model > def fooify! > img = rmagick_image > > # retrieve image''s width and height > > # compare both values to determine if the image is "portrait" or > "landscap" (if width > height, aspect_ratio = landscape, etc...) > > # if image is "portrait", resizes it using a threshold of 200px > height, decreasing the width proportionally. > # else, if it''s landscape, it resizes to a 400px WIDTH, resizing > the height proportionally > > # than store the image in a blob or filesystem, and the > aspect_ratio value in the DB > > self.rmagick_image = img > self > end > end > > My main point of ignorance is about how to gather information about > the image''s width and height.width = img.columns height = img.rows aspect = height > 0 ? width.to_f / height.to_f : 0 aspect_string = aspect > 1 ? ''landscape'' : ''portrait'' For resizing, you''ll probably need to calculate the percentage of scale to meet your desired dimensions, and then use the scale! method. scale_pct = aspect > 1 ? 400.0 / width.to_f : 200.0 / height.to_f img.scale!(scale_pct) Full documentation on rMagick is here: http://studio.imagemagick.org/RMagick/doc/ The primary thing you''ll want to look at in the documentation is in the reference section, under Classes, the four pages about the Image class. There are also some useful tutorials. Jim Crate Que Viva, LLC --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk-unsubscribe@googlegroups.com For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~----------~----~----~----~------~----~------~--~---
I couldn''t try your code yet, but I''ll do it within the next couple days... But thank you very much for the help! I''m sure this will be very helpful to me and a lot of people. On Mar 24, 10:21 am, Jim <jim...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:> On Mar 24, 4:02 am, Daniel Drehmer <danieldreh...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote: > > > Hi everyone... > > [snip] > > > > > class MyImage <FlexImage::Model > > def fooify! > > img = rmagick_image > > > # retrieve image''s width and height > > > # compare both values to determine if the image is "portrait" or > > "landscap" (if width > height, aspect_ratio = landscape, etc...) > > > # if image is "portrait", resizes it using a threshold of 200px > > height, decreasing the width proportionally. > > # else, if it''s landscape, it resizes to a 400px WIDTH, resizing > > the height proportionally > > > # than store the image in a blob or filesystem, and the > > aspect_ratio value in the DB > > > self.rmagick_image = img > > self > > end > > end > > > My main point of ignorance is about how to gather information about > > the image''s width and height. > > width = img.columns > height = img.rows > aspect = height > 0 ? width.to_f / height.to_f : 0 > > aspect_string = aspect > 1 ? ''landscape'' : ''portrait'' > > For resizing, you''ll probably need to calculate the percentage of > scale to meet your desired dimensions, and then use the scale! method. > > scale_pct = aspect > 1 ? 400.0 / width.to_f : 200.0 / height.to_f > img.scale!(scale_pct) > > Full documentation on rMagick is here: > > http://studio.imagemagick.org/RMagick/doc/ > > The primary thing you''ll want to look at in the documentation is in > the reference section, under Classes, the four pages about the Image > class. There are also some useful tutorials. > > Jim Crate > Que Viva, LLC--~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk-unsubscribe@googlegroups.com For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~----------~----~----~----~------~----~------~--~---
The code you''ve written is beautiful. It worked like a charm. Thank you again! --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~----------~----~----~----~------~----~------~--~---