XLib - Mapping Pixel Values to RGB

[SamoaWarrrior]

Hi everyone...
I'm working with XLib and I want to find out the pixel value of a particular point on screen and then map it to RGB values. I used XGetImage and XGetPixel to get the pixel value, but how do I get the RGB values of the pixel?
I went through a few XLib manuals, there seems to be no way. Any solution?

[wowbag1]

Hi, The colormap is a lookup table located on the server the pixel value is used as an index into the table.
So, you want to use XQueryColor function:

XQueryColor(display, colormap, def_in_out)
Display *display;
Colormap colormap;
XColor *def_in_out;

The XQueryColor() function returns the current RGB value for the pixel in the XColor structure and sets the DoRed, DoGreen, and DoBlue flags.

XQueryColor() can generate BadColor and BadValue errors.

BadColor A value for a Colormap argument does not name a defined Colormap.
BadValue Some numeric value falls outside the range of values accepted by the request. Unless a specific range is specified for an argument, the full range defined by the argument's type is accepted. Any argument defined as a set of alternatives can generate this error.

Hope this helps

[SamoaWarrrior]

That's exactly what I wanted, thanks... Helped a lot