Hi, > At first I was completely against antialiasing support because of > performance impact. But it being optional decreases the later. However > there is one problem: your patch relies on text_layer to be RGBA8888 > which was a mistake. RGBA8888 for text layer is vastly inefficient > especially on 16-bit framebuffer and CPUs with small cache. I had plans > to switch it to indexed color. Do you really need 8bits and 4 aren't > enough?
I use 8-bit in order to give GRUB ability to look and feel exactly as other parts of OS, so yes, 8 bits are required. If one can't allow this for his system - he can use 1-bit fonts. I don't really care about such situation just because other parts of desktop on such a system will be awful too. > If 4 are enough we could make text_layer IA44 (indexed-4 bits, > alpha 4 bits) if you need 8 bits we can do IA88. I'm not sure which one > is faster: firs one is more cache-efficient, second one requires less > ALU. Are you interested in implementing this? Actually I'm planning to add 32-bit AA (heh-heh). Sub-pixel AA for LCD monitors for complete match with xorg capabilities. And this just can't be done in indexed mode. So I can suggest to make division: 1-bit & indexed text layer vs 8(32)-bit & RGBA layer. First is for speed, second (and third) is for beauty (BURG project is already interested in - Bean, help me :)). Doing it half-way will be nor fast nor appealing. And yes, I'm interested in doing it in most effective way: blitter, optimizations etc., just give me the direction. > > Everything my path does is: > > > > 1) Enriches grub-mkfont with ability to write (and debug with -vv) > > pff3 (as I call it now) font format. There are 2 differences between > > pff2 and pff3 formats: FILE magic (PFF2 becomes PFF3) and DATA block > > entires size multiples by 8 (1bit -> 8bit). In other words PFF3 stores > > 8-bit alpha channel instead of 1-bit. > > And grub-mkfont will still be able to generate pff2, of course. > > > > > And by default grub-mkfont should generate not antialiased font for > performance reasons. But user or theme creator can choose to use > antialiased fonts if they wish. It's exactly the way my patch does it. AA is optional and used explicitly. _______________________________________________ Grub-devel mailing list Grub-devel@gnu.org http://lists.gnu.org/mailman/listinfo/grub-devel