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git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@22678 b3059339-0415-0410-9bf9-f77b7e298cf2
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diego 2007-03-17 09:18:08 +00:00
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@ -4,6 +4,7 @@ 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:
@ -15,31 +16,31 @@ mga_vid - MGA G200/G400 YUV Overlay kernel module
WARNING ----- WARNING
This code messes with your video card and your xserver. It will probably
lock up your box, format your hard drive, and cause your brand new g400
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 video
scaler/overlay unit to perform YUV->RGB colorspace conversion and
arbitrary video scaling.
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 approriate 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 frame buffer (if it knows the right padding, etc).
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 are test applications called mga_vid_test_g400 and mga_vid_test_g200.
Use the appropriate one for your card. This test code should draw some
nice 256x256 images for you if all is working well.
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.