ftp.xmission.com/2014.06.ftp.xmission.com.tar/ftp.xmission.com/pub/lists/fractdev/archive/fractdev.200104

Internet Message Format | 2001-04-30 | 9KB

From: "Jonathan Osuch" <[e-mail]>
Subject: DOS truecolor
Date: 01 Apr 2001 19:32:16 -0500

Tim,

Part of the problem I'm having with the truecolor routines is due to my
laptop's video chip.  The 888 modes display the correct colors but much
darker than they should be.  The colors look fine on my desktop machine.
I'll have a look at the VESA info.

There is something else wrong with the 565 modes.  It looks like some of the
color bits are getting lost.  This happens on both machines.

I've downloaded a bunch of VESA documentation.  Maybe something will turn
up.

Jonathan



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From: Tim Wegner <[e-mail]>
Subject: Re: DOS truecolor
Date: 01 Apr 2001 22:03:49 -0600

Jonatrhan wrote:

> There is something else wrong with the 565 modes.  It looks like some of the
> color bits are getting lost.  This happens on both machines.

If you tell me what to look for, I can try on my machine.

Some possible sources of help
  - compare with what Piclab, and see if Piclab has the same
problem
  - we could probably contact Bert. Even though he has long since
"retired" from fractint, it was never hard to get him working on the
truecolor.

Tim


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From: Rich <[e-mail]>
Subject: Re: DOS truecolor
Date: 02 Apr 2001 14:59:52 -0600


In article <000d01c0bb0c$967dc380$[e-mail]>,
    "Jonathan Osuch" <[e-mail]>  writes:

> The 888 modes display the correct colors but much
> darker than they should be.

This sounds like the gamma correction was set incorrectly, making the
colors appear too dark even though the correct values are stored in
the frame buffer.
--
Ask me about my upcoming book on Direct3D from Addison-Wesley!
Direct3D Book <http://www.xmission.com/~legalize/book/>
         Home <http://www.xmission.com/~legalize/>
    Fractals! <http://www.xmission.com/~legalize/fractals/>

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From: "Jonathan Osuch" <[e-mail]>
Subject: Re: DOS truecolor
Date: 02 Apr 2001 19:17:40 -0500

Tim,

> If you tell me what to look for, I can try on my machine.

I've modified the put pixel routine so I'd have to send you a patch first.
I plan to make some more modifications this week.  If I don't have it fixed
by the end of the week, I'll upload a temporary patch for you to look at.

I haven't looked at the get pixel routine, so solid guessing, etc. are
broken.  I will need to merge the truecolor routine with the standard
getpixel() routine to make it work.  This is because of the number of places
(files) where the getpixel() routine is used.

> Some possible sources of help
>  - compare with what Piclab, and see if Piclab has the same
> problem

I don't have it with me.  Maybe this weekend.

>  - we could probably contact Bert. Even though he has long since
> "retired" from fractint, it was never hard to get him working on the
> truecolor.

I'd like to hear what he is doing these days, but I don't think we need to
drag him into this just yet.

Jonathan



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From: "Jonathan Osuch" <[e-mail]>
Subject: DOS truecolor update
Date: 25 Apr 2001 19:38:11 -0500

It's been a while since any mention was made of progress with the DOS
truecolor patch.  There really is a good reason.  It works fine on one
machine, but not two others.  It looks like it is a problem with the
palette/dacbox because if I poke the appropriate values to the screen it
works fine.  Should be fixed soon.

Jonathan



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-------------------------------------------------------------------------------

From: "Jonathan Osuch" <[e-mail]>
Subject: ATI All-in-Wonder
Date: 29 Apr 2001 12:15:03 -0500

Tim,

I tried running Fractint on a machine using ATI's All-in-Wonder card this
morning.  No luck.  Fractint detects a VESA card, but the image is always
scrambled.  I've intentionally stayed away from the ATI cards since the Mach
8 because of their lousy drivers.  It appears they haven't gotten any
better.

Jonathan



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From: Tim Wegner <[e-mail]>
Subject: Re: ATI All-in-Wonder
Date: 29 Apr 2001 15:59:00 -0600

Jonathan wrote:

> I tried running Fractint on a machine using ATI's All-in-Wonder card this
> morning.  No luck.  Fractint detects a VESA card, but the image is always
> scrambled.  I've intentionally stayed away from the ATI cards since the Mach
> 8 because of their lousy drivers.  It appears they haven't gotten any
> better.

A few years ago, when I decided to join the "1600x1200" hardware
club, I tried a bunch of video boards. I ended up returning several
boards making liberal use of CompUSA's return policies. I felt a
littlke guilty about it, but in my defence it is impossible reading the
specs on the box to know what the VESA support is, and of
course the sales people are clueless. One of the boards I returned
was an ATI that had TV support (might have been called "All-in-
Wonder"). I ended up with a board with an Nvidia TNT chipset.

The problem is that VESA support these days is spotty because
so many people are running WIndows. The ATI board had fine
Windows driver support, but did not have a VESA 1600x1200
mode.

I have found boards with NVIDIA chipsets work well with Fractint.
My latest PC is an HP that comes with a board with the Nvidia
VANTA chipset. Works well.

Tim



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From: "Jonathan Osuch" <[e-mail]>
Subject: Xfractint patch
Date: 30 Apr 2001 20:23:01 -0500

Tim,

I slipped a dif for Xfractint into the 20.1.08 patch.  It only affects
Xfractint files and has the added x.  With it, the Xfractint code will
compile and run.  Otherwise, it won't.  I still haven't updated the
Xfractint sources.

Jonathan



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From: Tim Wegner <[e-mail]>
Subject: Re: Xfractint patch
Date: 30 Apr 2001 22:02:08 -0600


> I slipped a dif for Xfractint into the 20.1.08 patch.  It only affects
> Xfractint files and has the added x.  With it, the Xfractint code will
> compile and run.

I'll try it. I've installed Mandrake 8.0.

Tim


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