From: Rob Biedenharn <Rob@...>
Date: 2009-12-08T04:04:36+09:00
Subject: Re: Reading Images


On Dec 7, 2009, at 1:56 PM, Alexandro Kez wrote:

> Fleck, thanks for this really good answer, but could you tell then  
> what
> other data format may I use to avoid such parsings? I don't want to  
> use
> anything extra. Dunno about RMagick, but I've seen some rubyrames
> example, where it's also done easy, but I wanna make it with ass few
> external libs as possible, that's the idea  - I wanna see if ruby "da
> solo" is enough to coupe with such problems.

Before you continue, perhaps you need to read from the OpenGL FAQ:

21.110 How can I turn my files, such as GIF, JPG, BMP, etc. into a  
texture map?

http://www.opengl.org/resources/faq/technical/texture.htm#text0100

and the section that it references, too:

24.050 How can I save my OpenGL rendering as an image file, such as  
GIF, TIF, JPG, BMP, etc.? How can I read these image files and use  
them as texture maps?

http://www.opengl.org/resources/faq/technical/miscellaneous.htm#misc0050


So while you could use "ruby da solo", it's unlikely that you really  
want to.

-Rob

> Fleck Jean-Julien wrote:
>
>> The image.txt file looks like
>>
>> # ImageMagick pixel enumeration: 712,490,255,RGB
>> 0,0: (226,188,115)  #E2BC73  rgb(226,188,115)
>> 1,0: (227,189,116)  #E3BD74  rgb(227,189,116)
>> 2,0: (226,188,115)  #E2BC73  rgb(226,188,115)
>> ...
>> 709,489: (224,207,125)  #E0CF7D  rgb(224,207,125)
>> 710,489: (211,203,120)  #D3CB78  rgb(211,203,120)
>> 711,489: (134,129, 45)  #86812D  rgb(134,129,45)
>>
>> and its really easy to get the size (712x490) and the pixels colors
>> reading the file directly throught
>>
>> File.open(txt) do |f|
>>  f.readlines.each do |line|
>>    # action on each line using regexp to get the colors
>>  end
>> end
>>
>> Cheers,
> -- 
> Posted via http://www.ruby-forum.com/.
>

Rob Biedenharn		http://agileconsultingllc.com
Rob@AgileConsultingLLC.com
+1 513-295-4739
Skype:	rob.biedenharn