From: Ruby Tuesday <rubytuzdayz@...>
Date: 2004-02-04T06:25:05+09:00
Subject: Re: Image conversion ...

Hi Osuka, I will try what you suggested.

Thank you very much for your help.

"Osuka Adartse" <rocioestradacastaneda@prodigy.net.mx> wrote in message
news:40201B0B.9090905@prodigy.net.mx...
> Useko Netsumi wrote:
> > Hi, is there any Ruby code snippets I can use to transform my photo to
lower
> > resolution, uniform size but maintaining aspect ration, etc ...?
> >
> > Thanks
> >
> >
> >
> >
> I use GD and this lil' code, it keeps aspect ratio and ONLY works on jpg
> and png, since you say you use php, this could look familiar, the code
> could be *better* but does what I want use it or take it as reference,
> usage of copyResampled would give better output but haven't been able to
> use it.
>
> *warning nuby code ahead*
>
> require "GD"
> class Thumber
>    #imgpath=Full path to src image         i.e.
> "/home/osuka/pics/good_looking_me.jpg"
>    #thumb_dir=dir path ro dest directory   i.e. "/home/osuka/backups/"
> *notice* trailing /
>    #newx=new image width                   i.e. 320
>    #newy=new image height                  i.e. 240
>    #prefix=prefix to add to given image    i.e. "thumb_"
>    #type=image type of uotput thumb        i.e. "jpg"|png|gif <-depends
> on GD image write support this particular code
>    #uses only jpg and png, haven't need anything else, or in gif case
> can modified it to use an external app like Magick.
>    #or gif2png
>    def initialize(imgpath,thumb_dir,newx,newy,prefix,type)
>      @prefix=prefix
>      @imgpath=imgpath
>      @thumb_dir=thumb_dir
>      @type=type
>
>      if(@imgpath.downcase=~/[a-zA-Z0-9]+.(jpg||jpeg)+/)
>        #comment out if noisy
>        puts @srctype="jpeg"
>        @srcimg=GD::Image.new_from_jpeg(imgpath)
>        @ratio=@srcimg.width.to_f/@srcimg.height
>      elsif(@imgpath.downcase=~/[a-zA-Z0-9]+.(png)+/)
>        #comment out if noisy
>        puts @srctype="png"
>        @srcimg=GD::Image.new_from_png(imgpath)
>        @ratio=@srcimg.width.to_f/@srcimg.height
>      elsif(@imgpath.downcase=~/[a-zA-Z0-9]+.(gif)+/)
>        #comment out if noisy
>        puts @srctype="gif"
>        @srcimg=GD::Image.new_from_gif(imgpath)
>        @ratio=@srcimg.width.to_f/@srcimg.height
>      else
>        #comment out if noisy
>        puts "other"
>      end
>      @newx=newx
>      @newy=newy
>      #comment out if noisy
>      puts @ratio
>      if(@newy>@newx)
>        @newy=(@newx/@ratio).round
>      else
>        puts @newx=(@newy*@ratio).round
>      end
>
>      if(File.exists?(@thumb_dir+@prefix+File.basename(@imgpath)))
>        #comment out if noisy
>        puts "file exist"
>      else
>        #comment out if noisy
>        puts "file doesn't exist"
>        @dstimg=GD::Image.new(@newx,@newy)
>
>
@srcimg.copyResized(@dstimg,0,0,0,0,@newx,@newy,@srcimg.width,@srcimg.height
)
>        @thumbf=File.new(@thumb_dir+@prefix+File.basename(@imgpath),"wb")
>        if(@type=="jpg")
>          @dstimg.jpeg(@thumbf,85)
>        elsif(@type=="png")
>          @dstimg.png(@thumbf)
>        else(@type=="gif")
>          #@dstimg.gif(thumbf,85)
>        end
>      end
>
>    end
> end
>
> #example usage:
> #img1="e:/adartse/DNA.JPG"
> #mypic=Thumber.new(img1,"e:/temp/",80,100,"","jpg")
>
>
>
>