From: Ludvig Larsson Newsgroups: comp.os.msdos.djgpp Subject: Line frame buffer speed problem Date: Mon, 15 Feb 1999 15:26:12 +0100 Organization: Faas-Goldhart Lines: 41 Message-ID: <36C82E49.FDA@club-internet.fr> NNTP-Posting-Host: toulouse-camichel3-206.club-internet.fr Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Trace: front3.grolier.fr 919088582 7030 194.158.125.206 (15 Feb 1999 14:23:02 GMT) NNTP-Posting-Date: 15 Feb 1999 14:23:02 GMT X-Mailer: Mozilla 3.01C-CLUB (Win95; I) To: djgpp AT delorie DOT com DJ-Gateway: from newsgroup comp.os.msdos.djgpp Reply-To: djgpp AT delorie DOT com 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.