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Is XFree86 w/DGA the only way to achieve high performance direct
framebuffer rendering (page flipped) without any negative artifacts on
linux?
I'm using svgalib w/vesa right now for a strictly 8bpp project and the
only way I've managed to get fast (full) frame rates without tearing or
flickering
About a year ago I was using DGA for my games graphics library. I was told
by various people that using DGA was not the way to go. At first I thought this
was nonsense, as you can't get vsync using the more standard XPutImage method
(and get tearing). However, all changed when I bought a
On Sat, 2004-11-27 at 16:40 +, James Wright wrote:
About a year ago I was using DGA for my games graphics library. I
was told by various people that using DGA was not the way to go. At
first I thought this was nonsense, as you can't get vsync using the
more standard XPutImage method
In my opinion, direct framebuffer rendering is passe. My
recommendation is to render into system memory, use glDrawPixels
to copy to a GLXDrawable's back buffer and then use glXSwapBuffers
to display the buffer. At least with NVIDIA's binary drivers
this should be faster than direct
On Sat, 27 Nov 2004, James Wright wrote:
My understanding is that flat panels do not scan a screen as a CRT does,
so there is no vertcial blank period to perform a page flip. They do have a
refresh rate of usually around 60Hz, but his is simply how aften the pixels
are able to switch
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Thanks for your help guys! I've managed to remove the tearing on our DGA
program but the consequence is that the rendering speed went from a max of 15
fps (w/o vsync) to 9 fps (w/ vsync). Initially, the image reading from the
camera and the copying to the framebuffer was in a single thread (w/c
The problem with this is my project targets older laptops, it's a engine
management system tuning suite and alot of these car guys have junk bin
laptops sitting in their cars (pentium class) with a wide array of graphic
chipsets and displays. I don't think anyone will be using a accelerated
glx
