Opacity map

SDL Development
1

Hello!

Is it possible to set the alpha channel of a surface using a b/w bitmap of the same size of the surface ???

thanks

MandarX------------------------
http://mandarx.xoom.it/index.php?lang=eng

2

I don’t believe SDL provides a function that does this, but you can
certainly write such a routine yourself, using direct pixel access
(see http://www.libsdl.org/cgi/docwiki.cgi/Pixel_Access)

– BrianOn 4 March 2010 09:10, mandarx wrote:

Hello!

Is it possible to set the alpha channel of a surface using a b/w bitmap of
the same size of the surface ???

3

Brian Barrett wrote:

I don’t believe SDL provides a function that does this, but you can
certainly write such a routine yourself, using direct pixel access
(see http://www.libsdl.org/cgi/docwiki.cgi/Pixel_Access)

– Brian

thanks, I’ll try if I don’t resolve this problem:

http://forums.libsdl.org/viewtopic.php?t=6053------------------------
http://mandarx.xoom.it/index.php?lang=eng

4

mandarx wrote:

thanks, I’ll try if I don’t resolve this problem:
http://forums.libsdl.org/viewtopic.php?t=6053

I solved it!!!------------------------
http://mandarx.xoom.it/index.php?lang=eng