[coreboot] splash screen
jordan.crouse at amd.com
Thu Oct 2 01:42:32 CEST 2008
On 02/10/08 01:23 +0200, Stefan Reinauer wrote:
> Jordan Crouse wrote:
> > On 01/10/08 11:49 -0700, ron minnich wrote:
> >> On Wed, Oct 1, 2008 at 11:47 AM, Jordan Crouse <jordan.crouse at amd.com> wrote:
> >>> On 01/10/08 11:03 -0700, ron minnich wrote:
> >>>> OK I should read my mail more ... mode 3 it is.
> >>> No - not mode 3. You'll want to kick into a VESA mode of suitable
> >>> size so you can draw directly to the framebuffer.
> >> I'm trying x117 now?
> > Okay, since Ron is clearly serious about this, we have some matters to
> > attend to. The most important is how we are going to format the image
> > in the payload. I think we need to use a format that is
> > already familiar to the bootloader community - two that come to mind are
> > the lss16 format from Syslinux  and the xpm.gz format from Grub.
> For the bootsplash (www.bootsplash.org) we used an integer only jpeg
> decompressor that fit into round about 8kb of code.
> Together with the compression rate of the jpeg picture itself, this is
> hard to beat in terms of size ..
Is said decompressor in a license that we can be happy with? If so,
then I think we should consider adding it.
As a comparison - Ron's screenshot:
.png - 97466 bytes
.jpg - 46877 bytes
.rle - 24846 bytes
Implementation wise - the LSS16 function I just wrote is about 40 lines
of code with lots of whitespace.
Systems Software Development Engineer
Advanced Micro Devices, Inc.
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