Messages in this thread | | | Subject | Re: [PATCH] fbdev driver for S3 Trio/Virge, updated | From | "Antonino A. Daplas" <> | Date | Thu, 22 Feb 2007 09:08:25 +0800 |
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On Thu, 2007-02-22 at 00:53 +0000, James Simmons wrote: > > > +/* image data is MSB-first, fb structure is MSB-first too */ > > > +static inline u32 expand_color(u32 c) > > > +{ > > > + return ((c & 1) | ((c & 2) << 7) | ((c & 4) << 14) | ((c & 8) << 21)) * 0xFF; > > > +} > > > + > > > +/* s3fb_iplan_imageblit silently assumes that almost everything is 8-pixel aligned */ > > > > Hmn, same thing with vga16fb... Perhaps we should bring back the > > fontwidth flag of 2.2 and 2.4 kernels. > > Ug no. It is possible to get 12,6 bit width fonts working with vga > interleaved planes. I got it paritally working but never got back to it. > Its in my queue of this to do. Now that I finished the display class I > need to get around to makeing drm/fbdev work together :-) >
Of course, not fontwidth exactly, but to allow the driver to specify the alignment of the blit engine, in this case 8 pixels. I do believe X also has similar functionality to compensate for the limitation of the hardware.
Tony
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