diff options
| author | cinap_lenrek <cinap_lenrek@gmx.de> | 2012-07-18 10:16:00 +0200 |
|---|---|---|
| committer | cinap_lenrek <cinap_lenrek@gmx.de> | 2012-07-18 10:16:00 +0200 |
| commit | b9ca8e83784b94e709e7d412eb4f87fa0a1885a8 (patch) | |
| tree | e941217032e777d7ec33805930924d7fdd265aec /sys/man/3 | |
| parent | 5654f15e56087986812c557412d558482383fc8b (diff) | |
vga: softscreen
allow the shadow framebuffer (softscreen) to be used with any
vga driver, not just vesa. this removes the ugly scr->paddr = 0
hack employed by vesa driver to force softscreen and adds a
softscreen vgactl message that can switch the feature on and off
at runtime.
softscreen can greatly improve graphics performance when bus
reads are slow even tho it disables hardware acceleration.
Diffstat (limited to 'sys/man/3')
| -rw-r--r-- | sys/man/3/vga | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/sys/man/3/vga b/sys/man/3/vga index 3910f45ab..d17858008 100644 --- a/sys/man/3/vga +++ b/sys/man/3/vga @@ -170,6 +170,22 @@ used by the graphics engine. The default setting is .BR on . .TP +.BI softscreen " mode" +Depending on whether +.I mode +is +.B on +or +.BR off , +enable or disable shadow framebuffer to reduce +slow bus reads. Enabling +.BI softscreen +disables hardware acceleration. The default setting is +.BR off +except for the +.BR vesa +driver. +.TP .BI hwblank " mode" Depending on whether .I mode |