Worth noting, that the 4 bytes (starting at position 7, 2 for each) defining the width & height, are individually reversed. Example - today's FOTD starts (in Hex): 47 49 46 38 39 61 80 02 E0 01 ; GIF89a€.à. G I F 8 9 a 80 02 gets reversed ie 0280 - in decimal - 640 E0 01 gets reversed ie 01E0 - in decimal - 480 Hope this helps Paddy
-----Original Message----- From: fractint-bounces+padski=padski.com@mailman.xmission.com [mailto:fractint-bounces+padski=padski.com@mailman.xmission.com] On Behalf Of Jonathan Osuch Sent: Friday, March 09, 2007 1:53 PM To: Fractint and General Fractals Discussion Subject: Re: [Fractint] GIF File format
On Fri, 2007-03-09 at 02:32 -0600, Paul N. Lee wrote:
Where in a Fract???.gif file does the Fractint data appear? I have a question and want to be on sound ground before I raise it. All I can identify is that the file starts with GIF98a and near the end there is a little plain text that is "fractint001 Fractal" with the space actually being y with an umlaut over it. Nothing else identifiable as plain text. The point I particularly want to know about is how the V screen parameters are included.
It should be shortly after the GIF89a, as part of the standard GIF file format.
Actually, I believe it is at the end of the graphic file format, when FractInt saves the image file.
That is where the Fractint data is, yes. But, the answer to Charles' question about where the <v> screen data is, is that Fractint does not save it. The only information about the resolution of the GIF would be the stuff saved as part of the GIF specification (ie, right after GIF89a).
Jonathan
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