Hi again
I have decided to spend some time making the X11 system work better.
My ambition is to see if I can get all of "DirectFB-examples" to work!
I think I will be happy if they just work with X11 runnning in using 4
bytes per pixel!
Does X support alpha? And do I need to destinguish between RGB bit
(which seems to use 4 bytes)
and ARGB which - well also use 4 bytes per pixel?
And what about the setting in .directfbrc?
Right now when X is runnning some 4 bytes per pixel mode and I set the
same in .directfbrc like :
pixelformat=RGB32
pixelformat=ARGB
A lot of the examples works quite OK ... I think :)
Some of those that do not work properly are those not using 32 bit color
like "df_fire", that looks very wrong and spawns an extra X-window !
"df_window" also spawns an extra X-window but beseides that I looks OK,
but there are probably some problems I havent noticed.
Should it be necessary to set pixelformat to an 8 bit one in .directfbrc
when running fx. "df_fire" ?
I have copied the SDL system, which I have been told is not the best,
but what else can You suggest?
I know that one problem is in my :
static DFBResult update_screen( CoreSurface *surface, int x, int y, int
w, int h )
in particular in this area:
dst = xw->virtualscreen;
src += DFB_BYTES_PER_LINE( surface->format, x ) + y * pitch;
dst += DFB_BYTES_PER_LINE( surface->format, x ) + y *
xw->ximage->bytes_per_line;
*for* (i=0; i<h; ++i) {
direct_memcpy( dst, src, DFB_BYTES_PER_LINE( surface->format, w
) );
src += pitch;
dst += xw->ximage->bytes_per_line;
}
When running fx. df_fire there is a factor 4 in difference between my
destination lines and the source lines because it's a 8 bit palette. In
df_window the result of DFB_BYTES_PER_LINE( surface->format, x ) seems
to vary when I move the mouse around .... I find that quite strange, but
maybe You know why?
How can I make sure the correct palette conversions take place? i don't
suppose direct_memcpy does that ... But I have a memory of some comment
stating that there was a DirectFB function designed to help out with
this kind of problem ... Is that so?
Regards Martin Lütken
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