Re: Add color cursor support

[Alexandre Julliard]

Duane Clark  writes:
> The main ugly hack that is performed here is in determining whether a
> pixel is a foreground or background pixel. This is done by adding the
> red, green and blue values for each pixel, and testing whether they
> exceed an arbitrary threshold. This should probably be a reasonably
> safe method, since presumably any cursor will have a high level of
> contrast between foreground and background colors.

It's reasonable, but you should be doing this locally in the X image
before transferring it to the server; painting the pixmap in the
server pixel by pixel is going to be quite slow. And you may want to
have a look at CURSORICON_IconToCursor, it does something similar.