mirror of
https://github.com/mpv-player/mpv
synced 2024-12-24 15:52:25 +00:00
f20d1b16a8
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@22709 b3059339-0415-0410-9bf9-f77b7e298cf2
47 lines
1.5 KiB
Plaintext
47 lines
1.5 KiB
Plaintext
The code in this directory is the old mga_vid driver for Linux kernels
|
|
prior to 2.6. It does _not_ compile for version 2.6.x.
|
|
|
|
For Linux kernel 2.6.x please get the newest version of the 2.6 port from
|
|
http://attila.kinali.ch/mga/
|
|
|
|
|
|
mga_vid - MGA G200/G400 YUV Overlay kernel module
|
|
|
|
Author:
|
|
Aaron Holtzman <aholtzma@ess.engr.uvic.ca>, Oct 1999
|
|
|
|
Contributions by:
|
|
Fredrik Vraalsen <vraalsen@cs.uiuc.edu>
|
|
Alan Cox <alan@lxorguk.ukuu.org.uk>
|
|
|
|
WARNING ----- WARNING
|
|
|
|
This code messes with your video card and your X server. It will probably
|
|
lock up your box, format your hard drive, and cause your brand new G400
|
|
MAX to spout 6 inch flames. You have been warned.
|
|
|
|
WARNING ----- WARNING
|
|
|
|
What does this code do?
|
|
|
|
mga_vid is a kernel module that utilitizes the Matrox G200/G400/G550
|
|
video scaler/overlay unit to perform YUV->RGB colorspace conversion
|
|
and arbitrary video scaling.
|
|
|
|
mga_vid is also a monster hack.
|
|
|
|
How does mga_vid work?
|
|
|
|
This kernel module sets up the BES (backend scaler) with appropriate
|
|
values based on parameters supplied via ioctl. It also maps a chunk of
|
|
video memory into userspace via mmap. This memory is stolen from X
|
|
(which may decide to write to it later). The application can then write
|
|
image data directly to the framebuffer (if it knows the right padding,
|
|
etc).
|
|
|
|
|
|
How do I know if mga_vid works on my system?
|
|
|
|
There is a test application called mga_vid_test. This test code should
|
|
draw some nice 256x256 images for you if all is working well.
|