Re: Component on a pixmap.

[James Henstridge <james daa com au>]

I suppose so.  It should not be too difficult to do the pixel decoding
manually.  All the necessary information should be in the GdkImage and
associated GdkVisual structures.

James.

--
Email: james@daa.com.au
WWW:   http://www.daa.com.au/~james/


On Tue, 9 Nov 1999, NotZed wrote:

> 
> But this does NOT slow it down terribly much - all it means is that
> you get your own copy of the image buffer (which is possibly just a
> memcpy on a local server - i dunno, it runs pretty fast anyway).
> 
> The slow code is using image_get_pixel() for ever pixel, rather
> than using bit manipulation/copies to translate the pixels to RGB(A)
> format.  Apparently imlib has the code to do it, just need to snarf
> that up.
> 
>  Michael
> 
> > 
> > If you are just creating a GdkImage with gdk_image_new, it allows you to
> > specify what type of image you wish to create (SHARED or NORMAL -- shared
> > using shared memory).  The gdk_image_get() function does not seem to give
> > you this choice.  It always uses XGetImage rather than giving the choice
> > of XShmGetImage, which would speed up your code.
> > 
> > You would have to ask the gtk guys if there is a reason for this not being
> > in there.
> > 
> > James.
> > 
> > --
> > Email: james@daa.com.au
> > WWW:   http://www.daa.com.au/~james/
> > 
> > 
> > On Mon, 8 Nov 1999, Cody Russell wrote:
> > 
> > > 
> > > Imlib uses shared memory to do it more quickly. Unfortunately, I know
> > > nothing about how to do this. :/
> > > 
> > > bratsche
> > > 
> > 
> > 
> 
> 
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