[Xcb] pixel color

[Elliott Chapin]

The Xlib version uses XQueryPointer, XGetImage, XGetPixel.

On 11/13/2015 11:26 AM, Uli Schlachter wrote:
> Hi,
>
> Am 13.11.2015 um 16:22 schrieb Elliott Chapin:
>> Funny that you didn't notice my question was about Xcb, or that I had
>> implied that I succeeded in Xlib. Xcb documentation as such is not great
>> (Xlib has its O'Reilly books). The closest I've been able to get is
>> xcb_image_get_pixel in xcb_image.c. But what info is contained in
>> "pixel" in this code?
The Xlib version uses XQueryPointer, XGetImage, XGetPixel. I guess I
should assume the above works the same way. :-[  I may find out when I
import a library using it into some iForth code (see
http://home.claranet.nl/users/mhx/ ). Why? - I'll report on FaceBook if
I succeed. :-)


There is info on blending Xlib and Xcb, but I have had a hard time
adding Xlib to my Fedora 22 (which uses Xcb).

> [...]
>
> I did notice that your question was about xcb, but I did not understand what
> your question actually is. Thus, since you write that you already can do what
> you want with Xlib, I am asking for how the Xlib version of your code works. The
> idea being "How can I translate the following code to use XCB instead of Xlib?
> XCreateSimplwWindow(dpy, RootWindow(dpy, 0), 0, 0, 10, 10, 0, 0, 0);" is easier
> to answer than "How can I do windows with XCB?" (yes, exagerating example).
>
> Cheers,
>
> Uli

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