The bug in displaying toucan.bmp can either fixed by amending readbmp or
glpixels, but not both. Not sure what should be done, in little endian,
hfd 256 #. 255 0 0
ff0000
so that the high byte is 255, and reverse for big endian.
also in windows, RGB is a macro
#define RGB(r,g,b) \
((COLORREF)((BYTE)(r) | ((BYTE)(g) << 8) | ((BYTE)(b) << 16)))
that is r in the lowest byte
Apparently J601 does not use this convention.
Чтв, 12 Май 2011, L.Tomei писал(а):
>
> When I try to view a bmp image, I get wrong colors.
> It seems that red and blu are swapped.
>
> load 'viewmat'
> viewbmp jpath '~addons/graphics/bmp/toucan.bmp'
>
> Similar behaviour with viewrgb:
>
> viewrgb 100 100 $ 256 #. 255 0 0 NB. should be red, I get blu
> viewrgb 100 100 $ 256 #. 0 255 0 NB. ok, I get green
> viewrgb 100 100 $ 256 #. 0 0 255 NB. should be blu, I get red
>
> It works correctly in J601.
>
> Lorenzo
> --
> View this message in context:
> http://old.nabble.com/graphics-viewmat-tp31600727s24193p31600727.html
> Sent from the J Programming mailing list archive at Nabble.com.
>
> ----------------------------------------------------------------------
> For information about J forums see http://www.jsoftware.com/forums.htm
--
regards,
====================================================
GPG key 1024D/4434BAB3 2008-08-24
----------------------------------------------------------------------
For information about J forums see http://www.jsoftware.com/forums.htm
