On Tue, 2003-03-04 at 04:35, Petr Vandrovec wrote:
> My main concern now is 12x22 font... Accelerator setup
> is so costly for each separate painted character that for 8bpp
> accelerated version is even slower than unaccelerated one :-(
> (and almost twice as slow when compared with 2.4.x).
I submitted a patch to James, which he already applied to his tree, that
addresses this problem. It conglomerates the series of bitmaps into 1,
so only one fb_imageblit is necessary. It should give faster painting
than the original 2.5.x code, hopefully faster than 2.4.x code, but
slower than 8x16 painting because of the additional packing.
>
> And one (or two...) generic questions: why is not pseudo_palette
> u32* pseudo_palette, or even directly u32 pseudo_palette[17] ?
Yes, all drivers should treat the pseudo_palette as u32* anyway, so why
not change pseudo-palette from void* to u32*?
> And why we do not fill this pseudo_palette with
> i * 0x01010101U for 8bpp pseudocolor and i * 0x11111111U for 4bpp
> pseudocolor? This allowed me to remove couple of switches and tests
> from acceleration fastpaths (and from cfb_imageblit and cfb_fillrect,
> but I did not changed these two in my benchmarks below).
I also agree for a different reason. Cards with unconventional formats
(such as monochrome at 8 bpp - 0 for black , 0xff for white) will not
work with the current code.
Tony
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This archive was generated by hypermail 2b29 : Fri Mar 07 2003 - 22:00:23 EST