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