Add GIF image into PDF

[Tom_Yi@adobeforums.com]

Hello,
I can add jpg image into PDF file use DCTDecode. But how to add GIF image into PDF file? Can I use LZWDecode or FlateDecode to do that ?
Can someone give me a sample PDF file which contain GIF image?

Thanks!

Tom.

[Leonard_Rosenthol@adobeforums.com]

You will need to decode the GIF (eg. a GIF reader), parse the contents, and then transcode them to PDF.

[Tom_Yi@adobeforums.com]

It is said that GIF used LZW encode. If I use FlateDecode,can I add the GIF data stream into PDF file directly?

[Leonard_Rosenthol@adobeforums.com]

Yes, GIF uses LZW to compress some parts of itself - that is true.

I told you what you have to do to be able to put on into a PDF - that's how it works. PERIOD.

JPEG just happens to be a fluke - all other images require transcoding.

[Tom_Yi@adobeforums.com]

Thanks!
Can you give me some suggestion about how to transcode?

[Leonard_Rosenthol@adobeforums.com]

Start by reading the GIF specification about how they are put together. Then the PDF Reference/ISO 32000 about how image XObjects are formed. You should then see clearly how to transcode between them.