Hi,
I want to address some of the limitations of cfbimgblt.c, but
unfortunately I ended up practically rewriting the whole code. In
theory, the code (slow_imageblit):
a. supports all possible bit depths
b. should be able to handle destination writes that are not aligned by
an unsigned long
c. should be able to handle fix->line_length not a multiple of an
unsigned long
d. framebuffer access is always the size of an unsigned long and aligned
e. preliminary code for drawing the logo.
f. added Paul Mackerra's endianness patch (plus some of my own), but I
have no big-endian machine, so it's untested, and perhaps incorrect.
The only tests I've done for slow_imageblit is at 8, 16, 24, and 32 bpp,
and forcibly misaligning image->dx by 1 pixel. The code is slow, so I
included fast_imageblit for 8, 16 and 32 bpp which is an implementation
of fbcon-cfb8/16/32.c.
Tony
Hi,
I want to address some of the limitations of cfbimgblt.c, but
unfortunately I ended up practically rewriting the whole code. In
theory, the code (slow_imageblit):
Done.
a. supports all possible bit depths
Needs to added.
b. should be able to handle destination writes that are not aligned by
an unsigned long
Not added.
c. should be able to handle fix->line_length not a multiple of an
unsigned long
Access is also a unsigned long but currently is not aligned. It will be
fixed.
d. framebuffer access is always the size of an unsigned long and aligned
Yeah!!!
e. preliminary code for drawing the logo.
Paul please test the code.
f. added Paul Mackerra's endianness patch (plus some of my own), but I
have no big-endian machine, so it's untested, and perhaps incorrect.
The only tests I've done for slow_imageblit is at 8, 16, 24, and 32 bpp,
and forcibly misaligning image->dx by 1 pixel. The code is slow, so I
included fast_imageblit for 8, 16 and 32 bpp which is an implementation
of fbcon-cfb8/16/32.c.
Will begin testing today.
MS: (n) 1. A debilitating and surprisingly widespread affliction that
renders the sufferer barely able to perform the simplest task. 2. A disease.
James Simmons [jsimmons@users.sf.net] ____/|
fbdev/console/gfx developer \ o.O|
http://www.linux-fbdev.org =(_)=
http://linuxgfx.sourceforge.net U
http://linuxconsole.sourceforge.net
James Simmons writes:
Paul please test the code.
(The new cfbimgblt.c, that is.)
It mostly seems to be fine, except there are some problems with the
cursor. I have only tested it with the standard 8x16 font so far
though. I had to add a #include <video/fbcon.h> near the top to get
the definitions of fb_readl and fb_writel.
It seems to be not erasing the cursor image when it should. So, if I
am logged in on the console and I type a few characters and then press
backspace a few times, it leaves those character positions entirely
white. Also, when I press return it leaves the cursor image on that
line as well as drawing the cursor after the shell prompt on the next
line.
I just tried with the old cfbimgblt.c and it also does the same
thing. So it's not the new cfbimgblt.c that is doing this, it's
something else in your fbcon changes (or just possibly mine :). This
is with atyfb with my patches.
Paul.
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