The only other option that I can think of - which is a bit more work
up front, but faster at match time, would be to use some unique ID
from the database and store that as a custom key in the image's
dictionary. Then you can grab that back out during the loop over
images and compare that.
Leonard
On Jun 23, 2008, at 1:38 AM, Anthony Oganesian wrote:
> No, I get my images from the database, and I use the following
> method of
> adding it to the PDF:
>
> Image img = Image.getInstance(img_byte_array);
>
> But more importantly, when I parse the PDF in my click handler, all
> I get is
> PdfStream which does not contain a name field.
>
> Based on your suggestion I currently checksum img.getRawData(), pass
> the
> checksum in the URL and then as I loop through the streams, compare
> it with
> the checksum of PdfReader.getStreamBytesRaw((PRStream) stream). If it
> matches I assume I got the same image.
>
> So, the current answer to my original question of what the F()
> should be is:
>
> public String F(byte[] img_data)
> {
> CRC32 checksum = new CRC32();
> Checksum.update(img_data);
> return String.valueOf(checksum.getValue());
> }
>
> Unless there is a more elegant way, I will stick with this solution.
>
> Leonard, thank you very much for you help!
>
> Tony.
>
>> -----Original Message-----
>> From: [EMAIL PROTECTED] [mailto:itext-
>> [EMAIL PROTECTED] On Behalf Of Leonard
>> Rosenthol
>> Sent: Sunday, June 22, 2008 1:50 PM
>> To: Post all your questions about iText here
>> Subject: Re: [iText-questions] image reference for a special
>> application
>>
>> image name == filename?
>>
>> Don't you have a path to the file when you added it to the PDF to
>> begin with?
>>
>> Leonard
>>
>
>
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