On Thu, Oct 10, 2013 at 8:09 PM, Peter Jones <pjo...@redhat.com> wrote:
> INTN
> GetPixelElementSize (
> IN EFI_PIXEL_BITMASK *PixelBits
> )
> {
> INTN HighestPixel = -1;
> INTN BluePixel;
> INTN RedPixel;
> INTN GreenPixel;
> INTN RsvdPixel;
> BluePixel = FindHighestSetBit (PixelBits->BlueMask);
> RedPixel = FindHighestSetBit (PixelBits->RedMask);
> GreenPixel = FindHighestSetBit (PixelBits->GreenMask);
> RsvdPixel = FindHighestSetBit (PixelBits->ReservedMask);
> HighestPixel = max (BluePixel, RedPixel);
> HighestPixel = max (HighestPixel, GreenPixel);
> HighestPixel = max (HighestPixel, RsvdPixel);
> return HighestPixel;
> }
> EFI_PHYSICAL_ADDRESS NewPixelAddress;
> EFI_PHYSICAL_ADDRESS CurrentPixelAddress;
> EFI_GRAPHICS_OUTPUT_MODE_INFORMATION OutputInfo;
> INTN PixelElementSize;
>
> switch (OutputInfo.PixelFormat) {
> case PixelBitMask:
> PixelElementSize = GetPixelElementSize
> (&OutputInfo.PixelInformation);
So this can be less than 32.
> break;
> case PixelBlueGreenRedReserved8BitPerColor:
> case PixelRedGreenBlueReserved8BitPerColor:
> PixelElementSize = sizeof (EFI_GRAPHICS_OUTPUT_BLT_PIXEL);
> break;
> }
>
> Which makes this painfully clear.
>
>> Also, the main question would be, what is the typical value for
>> si->lfb_depth. 32 on almost all EFI systems? All around the map? Depends
>> on what graphics state the EFI bootloader passes us?
>
> Yes, 32 on almost all systems that implement a framebuffer console at
> all.
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- ge...@linux-m68k.org
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
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