Mail Archives: djgpp/1999/02/15/09:37:28
From: | Ludvig Larsson <ludvig AT club-internet DOT fr>
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Newsgroups: | comp.os.msdos.djgpp
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Subject: | Line frame buffer speed problem
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Date: | Mon, 15 Feb 1999 15:26:12 +0100
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Organization: | Faas-Goldhart
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Lines: | 41
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Message-ID: | <36C82E49.FDA@club-internet.fr>
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NNTP-Posting-Host: | toulouse-camichel3-206.club-internet.fr
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Mime-Version: | 1.0
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X-Trace: | front3.grolier.fr 919088582 7030 194.158.125.206 (15 Feb 1999 14:23:02 GMT)
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NNTP-Posting-Date: | 15 Feb 1999 14:23:02 GMT
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X-Mailer: | Mozilla 3.01C-CLUB (Win95; I)
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To: | djgpp AT delorie DOT com
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DJ-Gateway: | from newsgroup comp.os.msdos.djgpp
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Reply-To: | djgpp AT delorie DOT com
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Hi!
I have got a small problem.
I have a graphic library(done with DJGPP offcourse) which
I use in several applications.
Well, I'm currently working on a 3D-viewer and the banked modes
doesn't make life easy so I rebuilded it with mode-detection
and LineFrameBuffer support.
And performance dropped almost 70%...
I have an old Matrox Millennium and I thought that maybe there
were some drivers that wasn't up to date or something, so I got
SciTech Display Doctor and it updated a lot of stuff, but
still, the performance is really bad with LFB.
The testvalues from SciTech Display Control Center:
mode: 640x480x16bit: Banked
Clr screen: 75Mb/sec
BitBlt: 55Mb/sec
mode: 640x480x16bit: Linear buffer
Clr screen: 21Mb/sec
BitBlt: 19Mb/sec
Well, so I have an old card, but do I need to make
my library support LFB And Banked modes(as a commercial product)
or is my card broken/to old?
Any suggestions for a workaround would be highly appreciated.
Ludvig Larsson
ps. Sorry for this a bit offtopic question, but I really don't know what
to do.
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