Get and set pixel values

[Björne Lindberg <bjorne lindberg tfe umu se>]

Hi

 

I have loaded a pixmap image into a drawable area and now I want to rewrite it with some of the pixels moved from (xa.ya) to (xb, yb), but how can I get the pixel value at point (x,y) and how do I set the pixel value at the new (x1,y1)?

 

I need something like this:

 

setPixelValue(getPixelValue(x,y),x1,y1)

and it would be nice if it's quite fast, gdk_draw_point() will probably be to slow.

 

Are there anyone who might have a solution for me?

 

Sincerely

/Björne Lindberg