hi,
i'm a newbie of X programming; so excuse me if i'm not using the right terminology.
I'm making a program that display frames of
a proprietary format file on a X-window.
that frames has an alpha channel and i would like to display the frames
as they are ( so with trasparent background)
Currently my program work like that:
parse_proprietary_file();
while (!EOF(proprietary_file)){
get_frame();
convert_frame_to_Xpm();
XpmCreatePixmapFromData(... converted_frame, pixmap, mask_pixmap);
XsetClipMask(....mask_pixmap);
XCopyArea(...,pixmap, window_of_the_program, ....);
sleep(some_seconds);
/* to Clear the window */
XClearArea(display,window_of_the_program,.....);
}
this way of coding is not so fast ( i'm displaying 18 frames per second and
they are 320 * 320 ) and it doesn't work as i like (i would like to have an
"invisible" Window on which display the frames, so if the frames is a dog
running with no background, the program display only the dog running and on
the background you can see the desktop, or a window) .
i don't care about ppl using Xfree 3.x i would like to make it fast for X 4.
Someone suggest me to use Xrender, and i start to read all the docs from
www.eax.com/render and from KeithP Hp .
Now i'm rather confused on how to start to recode the program .. i took a look
to sample codes of eax.com and it seem Xrender has a lots of implementations
with fonts ( for antialiasing) but none about "Playing with images with alpha
channel".
any hints, suggestion doc, book to read?
i'm stalled, i still do not understand how to use
Xrender for my app.
thanks
Samuele
--
Samuele Tonon <[EMAIL PROTECTED]> http://www.linuxasylum.net/~samu/
Acid -- better living through chemistry.
Timothy Leary
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