[Xorg-driver-geode] Rendering in geode

[Huang, FrankR]

I think I do not make the question clear.
Let me take an example:

	picture_10x10[0].pict = XRenderCreatePicture(dpy, picture_10x10[0].d, picture_10x10[0].format, CPRepeat, &pa);
	XRenderComposite(dpy, PictOpOver, picture_10x10[0].pict, 0, win->pict, 5, 11, 0, 0, 0, 0, 40, 40);
	
The source picture is 10x10 region and is repeatable, the srcX is 5 and srcY is 11(greater than 10), the needed rendering region is 40x40.
After this is executed, actually a region of 40x40 is rendered. I have not see the modulus(%) operation. For example 11%10 = 1 ... So what's your mean about the modulus operation?
So my question is that in this condition, how the destination region is rendered? It is important for me. From the experiment, I found it is 40x40 region rendered.


Thanks,
Frank 

-----Original Message-----
From: Jonathan Morton [mailto:jonathan.morton at movial.com] 
Sent: 2010?7?10? 0:34
To: Huang, FrankR
Cc: xorg-driver-geode at lists.x.org; xorg-devel at lists.x.org
Subject: RE: [Xorg-driver-geode] Rendering in geode

> > If Repeat is Normal (1), then the coordinate is wrapped back into
> > the image using the modulus (%) operation.  This is your usual
> > repeating tile function.  As a special case, a 1x1 image with Repeat
> > set to Normal is the usual way of representing a solid colour.
> 
> I found that the region rendered actually is the width x height in
> this condition. I don't find the modulus operation. Any comments?

The destination region is always specified explicitly as (x,y)(WxH).
The source and mask pixels used can vary.

-- 
------
From: Jonathan Morton
      jonathan.morton at movial.com