[Fractdev] <Richard>I don't understand usage of some of the …

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Author: Hal Lane
Date:  
To: Fractint_Developers
Subject: [Fractdev] <Richard>I don't understand usage of some of the new FRACTINT.CFG file
Richard,
These are minor items in Fractint for Windows beta 5,
but are possibly features that are behaving differently
than intended.


In the FRACTINT.CFG file,

when I tried to add the phrase: square pixels
(as a comment to the F2, F3, etc. lines)
between the pair of commas in: 256,,gdi
in some of the rows, as follows: 256,square pixels,gdi

I was trying to follow the 'instructions' of the column headings:
|clr| comments | driver

When I do the above the comment phrase: square pixels does
*not* appear in Fractint for Windows beta 5's screen that
lists resolution choices brought up by the <del> key.

Is this a problem? <---<<


The comments from the DOS FRACTINT.CFG file are listed in DOS
Fractint's list of resolutions screen.


I also noticed that you list the order of columns in the
Fractint for Windows list of resolutions screen as:
.colr.driver......comment...
with the order of the driver and comment reversed from the
FRACTINT.CFG file. This may or may not be as you intended it.


Interestingly, when I added a couple of Win32 Disk Video lines
that ended like this:
19, 2048, 1536,256,(1024x768*2),disk
and this:
19, 4096, 3072,256,(1024x768*2),disk

the list of resolutions *did* show the:
(1024x768*2)

So, the comment feature of the FRACTINT.CFG file works
for some lines and not for others.

Note: the two lines (above) had no key associated with them.
(Their definition lines started with leading spaces and
a leading comma.)


These above added disk resolutions create the intended
files OK - with the correct resolutions.

Its great to still be able to add arbitrary resolutions.

I sometimes calculate images at higher resolutions
than I want for the final image. I then 'downsample'
the higher resolution image with bicubic sampling to get
a more anti-aliased version for the final image.

I realize that this methodology can be problematical
when applied to fractals, but has worked well for the
particular fractals I have used it on.


Also, I found that the line in FRACTINT.CFG defining:
F9 ... 1280, 960,256,
does *not* appear in the Fractint for Windows screen that
lists resolution choices when I am using 1280x1024.
It *does* appear when I increase my screen resolution
to 1600x1200. You apparently interrogate the current
screen resolution to see if it will support each
Win32 GDI Video resolution in the FRACTINT.CFG file
plus its containing window border.

Very nice.


I note that there are also at least two resolutions shown -
480 x 360 (disk & video) and 1500 x 1125 (disk) - in the
Fractint for Windows resolutions screen table that are *not*
in the FRACTINT.CFG file.


I guess I don't know where the 480 x 360 and 1500 x 1125
pixel resolutions come from or why some comments in the
FRACTINT.CFG file appear and others don't.

- Hal Lane

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