[Bug 12717] Europa Universalis III: Borders drawn corrupted

[wine-bugs at winehq.org]

http://bugs.winehq.org/show_bug.cgi?id=12717





--- Comment #17 from knan-wine at anduin.net  2008-09-22 12:55:53 ---
(In reply to comment #14)
> Created an attachment (id=14720)
 --> (http://bugs.winehq.org/attachment.cgi?id=14720) [details]
> a "broken" sample file 

May be a 24-bit image stored as 32-bit. Since the alpha channel is all 0 (which
in tga is "fully transparent"), it may be interpreted as fully transparent all
over.

But a random googled specification
(http://local.wasp.uwa.edu.au/~pbourke/dataformats/tga/) says: "The 4 byte
entry contains 1 byte each of blue, green, red, and attribute.  For faster
speed (because of the hardware of the Targa board itself), Targa 24 images are
sometimes stored as Targa 32 images."

So an alternative interpretation is "crap alpha channel data, ignore it" - a
valid interpretation according to the tga standards. File looks quite valid,
just a bit strange.

tgatoppm just throws away the alpha channel, clearing up any confusion.


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