Possible to determine image dimensions on cffile upload?

Page 6 of http://www.w3.org/Graphics/JPEG/jfif3.pdf describes the location of the Xdensity and Ydensity fields (2 bytes each) for a JPEG. http://www.martinreddy.net/gfx/2d/GIF87a.txt will tell you similar information about the GIF file format.

If that's too much to digest, get yourself a good custom tag, or wait for native functionality in ColdFusion 8. Google coldFusion "custom tag" "image size"

Yes, I use a script that will determine the dimensions so I can put the heigth and width into database fields for use laster. I will attach the code I use for you.

or...

<cfset image_name ="C:\pathtofile\imagefile.jpg">

<cfscript>
imgFile = createObject("java","javax.swing.ImageIcon").init("#image_name#");
imgFile.getImage();
w = imgFile.getIconWidth();
h = imgFile.getIconHeight();
</cfscript>

<cfoutput>width="#w#" height="#h#</cfoutput>


Adjust code accordingly to what you are doing.

Abinidi wrote:

> <cfscript>
> imgFile = createObject("java","javax.swing.ImageIcon").init("#image_name#");
> imgFile.getImage();
> w = imgFile.getIconWidth();
> h = imgFile.getIconHeight();
> </cfscript>

this is way cool, man!
do you know if there is a way to check the dimensions of an uploaded
flash (swf) movie ?

--
Azadi Saryev
Sabai-dee.com
Vientiane, Laos
http://www.sabai-dee.com

>do you know if there is a way to check the dimensions of an uploaded
>flash (swf) movie ?

I have never used it but you might check out FlashInspector.CFC at
http://www.doughughes.net/index.cfm?event=viewEntry&entryId=166

exactly what i needed! thanks a bunch!

--

Azadi Saryev
Sabai-dee.com
http://www.sabai-dee.com

Abinidi wrote:
> or...
>
> <cfset image_name ="C:\pathtofile\imagefile.jpg">
>
> <cfscript>
> imgFile = createObject("java","javax.swing.ImageIcon").init("#image_name#");
> imgFile.getImage();
> w = imgFile.getIconWidth();
> h = imgFile.getIconHeight();
> </cfscript>
>
> <cfoutput>width="#w#" height="#h#</cfoutput>
>
>
> Adjust code accordingly to what you are doing.
>

i am trying to use the above code to check for dimensions of uploaded
image and delete the image (through cffile action=delete) if its
dimensions are different from required. the checking part works fine,
but i am unable to delete the image!
CF trows an error:
ColdFusion could not delete the file "[full path to file]\[filename]"
for an unknown reason.

the path is correct, the file is there, and i can delete it manually
without a problem, but not with cffile action=delete...

any ideas? does that have something to do with the instantiated java
object? how do i de-instantiate it?

--
Azadi Saryev
Sabai-dee.com
Vientiane, Laos
http://www.sabai-dee.com

well, i have come up with a work-around, but would still like to learn
how (if possible) to release a java object invoked with createObject()...

in case anyone is interested, the work-around i implemented is:
add uploaded files of wrong dimensions to a list, after succefful upload
of correct file pass the list to another page which silently loops
through it and deletes the files from server and returns user to
original calling page...
--

Azadi Saryev
Sabai-dee.com
http://www.sabai-dee.com

Azadi,

I ran a few tests and cffile delete worked. So I'm not sure what the problem is. I looked at the cfc and it refers to two java classes.

java.io.ByteArrayInputStream
java.util.zip.InflaterInputStream

Both classes have a close() method, though ByteArrayInputStream.close() doesn't do anything. For grins .. you might try adding a function to the FlashInspector.cfc that calls the close() method on the java objects. Then call that function just before attempting to deleting the file. I don't know that it will help but its worth a shot.

thanks for your input, cf_dev2!

i was actually having the problem with getting jpeg dimensions using
Abinidi's code that uses javax.swing.ImageIcon class, not the
FlashInspector.cfc...

the FlashInspector works like a charm... it's the created java object
that would not release and let me delete the jpeg image if its
dimensions are wrong...

i have since switched to using imagecfc from opensourcecf - a lot more
code, but all packed into a cfc, and lets you resize/crop the image to
correct dimensions instead of just telling the user "sorry, your image
is wrong size, please resize and re-upload"...

but thank for your time looking into this, and your url for the
FlashInspector.cfc was a true lifesaver!

--
Azadi Saryev
Sabai-dee.com
Vientiane, Laos
http://www.sabai-dee.com

> i was actually having the problem with getting jpeg dimensions

Azadi,

Well that's what I get for trying to read before I've had my morning coffee ;-)

Now that I think about it I remember having a similar problem. Either with java.swing.ImageIcon or java.awt.Image or both. But it sounds like imagecfc has solved your problem and it does have some great features.

Until next time then!