nanogui: Thread: save image

Hi 

I have created image on window by using Grpoints nano -X API. 
Now I wanted to save image in the file .
How to save image in a  particulat file. I could not find any API for this.


Raj

pushparaj muthu ha scritto:
> Hi 
> 
> I have created image on window by using Grpoints nano -X API. 
> Now I wanted to save image in the file .
> How to save image in a  particulat file. I could not find any API for this.

If you compiled nano-X with LINK_APP_INTO_SERVER = Y you may use 
GrNewPixmap(GR_SIZE width, GR_SIZE height, void *pixels) which allocates 
some space into pixels (see srvfunc.c), then GrCopyArea to copy your 
window into the id returned by GrNewPixmap, and save directly pixels[] 
in a file. Don't forget to free(pixels) :)
AFAIK GrNewPixmap ignores void *pixels if LINK_APP_INTO_SERVER = N.
Some better solution for this?

Regards,
Carlo

> 
> 
> Raj
> 
> 
> 
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: If you compiled nano-X with LINK_APP_INTO_SERVER = Y you may use 
: GrNewPixmap(GR_SIZE width, GR_SIZE height, void *pixels) which allocates 
: some space into pixels (see srvfunc.c), then GrCopyArea to copy your 
: window into the id returned by GrNewPixmap, and save directly pixels[] 
: in a file. Don't forget to free(pixels) :)
: AFAIK GrNewPixmap ignores void *pixels if LINK_APP_INTO_SERVER = N.

There's no need to LINK_APP_INTO_SERVER in order
to get a local buffer with GrNewPixmap.  Instead, draw to a pixmap
or the screen, then use GrReadArea rather than GrCopyArea to 
return the pixels to a user buffer.  This will work in all cases.

Regards,

Greg