Remove unnecessary pointer increment. A wrong pointer may be passed to
free(9) and it can cause kernel panic when there are multiple graphics
controllers in the system.
Sync. pixel mode support for VESA and VGA frame buffers with HEAD.
- Map entire video memory again. Although we do not use them all directly,
it seems VGA renderer may access unmapped memory region and cause kernel
panic.
- Fall back to VGA palette functions if VESA function failed and DAC is
still in 6-bit mode. Although we have to check non-VGA compatibility bit
here, it seems there are too many broken VESA BIOSes out to rely on it.
- Be careful when we determine bytes per scan line information. We compare
mode table data against minimum value. If the mode table does not make
sense, we set the minimum in the mode info.
- Teach VGA framebuffer about 8-bit palette format for VESA.
- Add my copyright here.
framebuffer driver, etc. work on FreeBSD/amd64.
A significant amount of improvements were done by jkim@ during the recent
months to make vesa(4) work better, over the initial code import. This
work is based on OpenBSD's x86emu implementation and contributed by
paradox <ddkprog yahoo com> and swell.k at gmail com.
Hopefully I have stolen all their work to 8-STABLE :)
All bugs in this commit are mine, as usual.
