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Ron, Are you sending out the proper header information? Check the error_log of apache. You might see a "premature end of headers" error. I've done graphics on the fly using PHP. They have a good example too. Also GD ( http://stein.cshl.org/WWW/software/GD/) for a perl or C based solution has some examples of dynamically generating images. > > Does /cgi-bin/tile need to output something differently than if it were > simply dumping a PNG to a file? > Yes, you need to send out the header information (header,blankline) then the image. print ("Content-type: image/png\n\n"); ...{send image} David On Wed, 16 Aug 2000, Ron Peterson wrote: > I'm trying to generate some PNG's on the fly, and include them in some > web pages. The C program I wrote to create them dumps the PNG data > stream to stdout. I can dump the output to a file and it looks perfect. > > So, no problem, I think. Rather than point to a file w/ my <img> tag, > I'll point to the program. Like <img src="/cgi-bin/tile" alt="blah > blah" width="512" height="512" border=0>. Doesn't work. I've checked > that ownership and permissions of program are o.k. to be run by Apache. > I'm confused. I thought this kind of thing was supposed to work. No? > If this is possible, let me know, and I'll keep hacking. As long as I > know I'm not wasting my time... > > -- > > Ron Peterson > Systems Manager > Wallace Floyd Design Group > 273 Summer Street > Boston, MA 02210 > 617.350.7400 tel > 617.350.0051 fax > rpeterson at wallacefloyd.com > - > Subcription/unsubscription/info requests: send e-mail with > "subscribe", "unsubscribe", or "info" on the first line of the > message body to discuss-request at blu.org (Subject line is ignored). -- .david David Lapointe Email is not to be used for information or data, only for business. -- Management - Subcription/unsubscription/info requests: send e-mail with "subscribe", "unsubscribe", or "info" on the first line of the message body to discuss-request at blu.org (Subject line is ignored).
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