ATI mach64 resolution?

[Markku Kolkka]

Kam Leo kirjoitti viestissään (lähetysaika torstai, 13. tammikuuta 2005 22:53):
> RESOLUTION = WIDTH x HEIGHT = 1280 x 1024 = 1310720
>
> COLOR_DEPTH (256 colors) = COLOR_CHANNELS x BITS_PER_PIXEL = 3
> x BITS_PER_PIXEL = 3 x 8 bits_per_pixel = 3 bytes_per_pixel

X actually uses 32 bits for each pixel in 24 bit color mode,
have a look at /var/log/Xorg.0.log: 

(**) RADEON(0): Depth 24, (--) framebuffer bpp 32
(II) RADEON(0): Pixel depth = 24 bits stored in 4 bytes (32 bpp pixmaps)

> RESOLUTION x COLOR_DEPTH <= VIDEO MEMORY
>
> 1280 x 1024 x 3 = 3,932,160 bytes <= 4 MB

1280 x 1024 x 4 = 5242880 bytes > 4 MB.

-- 
 Markku Kolkka
 markku.kolkka at iki.fi