Re: html images

> Greetings,
>
> I have some code that generates html with an embedded image <IMG>.  
> I have
> tried two ways of doing this:
>
> Option 1.   html imageWithForm: (ImageReadWriter formFromFileNamed:  
> fn).
>
> Option 2.   html image: fn.
>
> where 'fn' is the pathname of the jpg file in my filesystem, e.g.,
> "/foo/bar.jpg".
>
>
> When I use Option 1, the resulting image is very grainy - almost  
> unusable.
> Option 2 produces good results.  I am trying to figure out why this  
> is the
> case.
>
> Why is it that ImageReadWriter produces such a poor image when  
> compared to
> the exact file being served by the httpserver?
>
> I would appreciate any clues or pointers.
>
> Thanks,
> Frank
>
>
>
> _______________________________________________
> Seaside mailing list
> [hidden email]
> http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/seaside

> I'm no expert, but I can share the experiences of a colleague who  
> has been evaluating Squeak primarily from the  perspective of its  
> usefulness for building a graphically intense application.
>
> He experimented with PNGReadWriter and with ImageReadwriter and  
> reported both of them distorted images pretty badly. (His  
> characterization). He concluded after some effort that Squeak  
> cannot be used for the kind of app he had in mind. I've seen/heard  
> rumblings from time to time on the main Squeak list that the  
> graphics engine in Squeak doesn't lend itself well to antialiased  
> rendering of text and images but I've had zero experience of my own  
> with it.
>
> Dan
>
> On Jul 8, 2006, at 1:22 PM, Frank Sukhu wrote:
>
>> Greetings,
>>
>> I have some code that generates html with an embedded image  
>> <IMG>.  I have
>> tried two ways of doing this:
>>
>> Option 1.   html imageWithForm: (ImageReadWriter  
>> formFromFileNamed: fn).
>>
>> Option 2.   html image: fn.
>>
>> where 'fn' is the pathname of the jpg file in my filesystem, e.g.,
>> "/foo/bar.jpg".
>>
>>
>> When I use Option 1, the resulting image is very grainy - almost  
>> unusable.
>> Option 2 produces good results.  I am trying to figure out why  
>> this is the
>> case.
>>
>> Why is it that ImageReadWriter produces such a poor image when  
>> compared to
>> the exact file being served by the httpserver?
>>
>> I would appreciate any clues or pointers.
>>
>> Thanks,
>> Frank
>>
>>
>>
>> _______________________________________________
>> Seaside mailing list
>> [hidden email]
>> http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/seaside
>
> _______________________________________________
> Seaside mailing list
> [hidden email]
> http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/seaside

> Greetings,
>
> I have some code that generates html with an embedded image <IMG>.  I have
> tried two ways of doing this:
>
> Option 1.   html imageWithForm: (ImageReadWriter formFromFileNamed: fn).
>
> Option 2.   html image: fn.
>
> where 'fn' is the pathname of the jpg file in my filesystem, e.g.,
> "/foo/bar.jpg".
>
>
> When I use Option 1, the resulting image is very grainy - almost unusable.
> Option 2 produces good results.  I am trying to figure out why this is the
> case.
>
> Why is it that ImageReadWriter produces such a poor image when compared to
> the exact file being served by the httpserver?
>
> I would appreciate any clues or pointers.
>
> Thanks,
> Frank

>
> AFAIK ImageReadWriter use Form which returns ever a gif from its
> method asMIMEDocument.
>
> I you change such method by:
>
> asMIMEDocument
> | aStream rw |
>
>     aStream := RWBinaryOrTextStream on: String new.
>     rw := PNGReadWriter on: aStream.
>     rw nextPutImage: self.
>     rw close.
>     aStream reset.
>     ^MIMEDocument contentType: 'image/png' content: aStream contents
>
> you will get the png correctly showed.
>

>Greetings,
>
>I have some code that generates html with an embedded image <IMG>.  I have
>tried two ways of doing this:
>
>Option 1.   html imageWithForm: (ImageReadWriter formFromFileNamed: fn).
>
>Option 2.   html image: fn.
>
>where 'fn' is the pathname of the jpg file in my filesystem, e.g.,
>"/foo/bar.jpg".
>
>
>When I use Option 1, the resulting image is very grainy - almost unusable.
>Option 2 produces good results.  I am trying to figure out why this is the
>case.
>
>Why is it that ImageReadWriter produces such a poor image when compared to
>the exact file being served by the httpserver?
>
>I would appreciate any clues or pointers.
>
>Thanks,
>Frank
>

> I have some code that generates html with an embedded image <IMG>.  I have
> tried two ways of doing this:
>
> Option 1.   html imageWithForm: (ImageReadWriter formFromFileNamed: fn).
>
> Option 2.   html image: fn.
>
> where 'fn' is the pathname of the jpg file in my filesystem, e.g.,
> "/foo/bar.jpg".
>
>
> When I use Option 1, the resulting image is very grainy - almost unusable.
> Option 2 produces good results.  I am trying to figure out why this is the
> case.
>
> Why is it that ImageReadWriter produces such a poor image when compared to
> the exact file being served by the httpserver?
>
> I would appreciate any clues or pointers.
>
> Thanks,
> Frank

> German Arduino a écrit :
>
>>
>> AFAIK ImageReadWriter use Form which returns ever a gif from its
>> method asMIMEDocument.
>>
>> I you change such method by:
>>
>> asMIMEDocument
>> | aStream rw |
>>
>>     aStream := RWBinaryOrTextStream on: String new.
>>     rw := PNGReadWriter on: aStream.
>>     rw nextPutImage: self.
>>     rw close.
>>     aStream reset.
>>     ^MIMEDocument contentType: 'image/png' content: aStream contents
>>
>> you will get the png correctly showed.
>>
> I believe there will be no need to change asMIMEDocument if you use this :
>
>    html imageWithFileNamed:  fn
>
> Using the above ensures that the image does not get unnecessarily
> converted to gif.
> HTH
> Michel.