RE: [XaraXtreme-dev] Problem with contours loading Groucho2.xar

["Gerry Iles" <GerryI@xxxxxxxx>]

Yes, I suspect you've got that right.  Also, transparent 8bpp bitmaps
probably won't get saved as JPEG either.  I'm not sure that using JPEG
for 4bpp bitmaps would be worthwhile except as it would probably
introduce easily visible artefacts in a bitmap with that few colours and
the space saving would probably be very small in any case.

Gerry

-----Original Message-----
From: owner-dev@xxxxxxxxxxxxxxxx [mailto:owner-dev@xxxxxxxxxxxxxxxx] On
Behalf Of Charles Moir
Sent: 28 June 2006 12:50
To: dev@xxxxxxxxxxxxxx
Subject: RE: [XaraXtreme-dev] Problem with contours loading Groucho2.xar

Ah .web files.  Er except when I try to save a .web the checkbox 'Use
JPEG on compatible bitmaps' is greyed and I have a drawing with the
default 4bpp bitmaps and some PNGs.

But I think the answer to that is probably '4bpp bitmaps are not
compatible and neither are alpha-channel PNGs' Although it would be
useful to JPG compress both of them (alpha JPGs are quite common
nowadays) for .web files.

Still, that explains it.

Charles


> -----Original Message-----
> From: owner-dev@xxxxxxxxxxxxxxxx 
> [mailto:owner-dev@xxxxxxxxxxxxxxxx] On Behalf Of Gerry Iles
> Sent: 28 June 2006 12:39
> To: dev@xxxxxxxxxxxxxx
> Subject: RE: [XaraXtreme-dev] Problem with contours loading 
> Groucho2.xar
> 
> These clipart files were originally saved as .web which 
> allows all bitmaps to be saved as JPEGs.  8bpp ones are saved 
> with their original palette so they can be converted back to 
> 8bpp on loading.  This has been a feature of the Xar format 
> for as long as I can remember.
> 
> Gerry
> 
> -----Original Message-----
> From: owner-dev@xxxxxxxxxxxxxxxx 
> [mailto:owner-dev@xxxxxxxxxxxxxxxx] On Behalf Of Charles Moir
> Sent: 28 June 2006 12:37
> To: dev@xxxxxxxxxxxxxx
> Subject: RE: [XaraXtreme-dev] Problem with contours loading 
> Groucho2.xar
> 
> 8bpp files saved as JPEGs?  How is that possible? That's not 
> a Camelot feature I'm aware of.
> 
> Charles
> 
> 
> > -----Original Message-----
> > From: owner-dev@xxxxxxxxxxxxxxxx
> > [mailto:owner-dev@xxxxxxxxxxxxxxxx] On Behalf Of Gerry Iles
> > Sent: 28 June 2006 12:35
> > To: dev@xxxxxxxxxxxxxx
> > Subject: RE: [XaraXtreme-dev] Problem with contours loading 
> > Groucho2.xar
> > 
> > Not specifically in response to this message but r1377 
> fixes the RGB 
> > order issue with the bitmap textures in this file so the frame now 
> > renders as brown rather than blue.  The various textures in 
> this file 
> > are 8bpp but have been saved as JPEGs along with an 8bpp 
> palette and 
> > the code that converted the JPEG back to 8bpp on loading 
> was swapping 
> > R and B on non-MSW builds.
> > 
> > Gerry
> > 
> > -----Original Message-----
> > From: owner-dev@xxxxxxxxxxxxxxxx
> > [mailto:owner-dev@xxxxxxxxxxxxxxxx] On Behalf Of Gavin Theobald
> > Sent: 28 June 2006 10:04
> > To: dev@xxxxxxxxxxxxxx
> > Subject: RE: [XaraXtreme-dev] Problem with contours loading 
> > Groucho2.xar
> > 
> > Could it be that some files had been built with the flag 
> set, but not 
> > others? I don't know if this would be possible.
> > 
> > Gavin
> > 
>