[Geany-Devel] Mistake in utils_invert_color
vmkononenko at xxxxx
Wed Oct 30 21:54:14 UTC 2013
Ok. Now I've found an appropriate one - rotate_rgb.
False alarm, thanks :)
On 30 October 2013 23:03, Colomban Wendling <lists.ban at herbesfolles.org>wrote:
> Le 30/10/2013 21:10, Volodymyr Kononenko a écrit :
> > While playing with colors for pairtaghighlighter plugin, I saw that
> > Scintilla is using BGR instead of normal RGB. I found existing code in
> > Geany source to use it in my plugin.
> > utils_invert_color from utils.c deals with replacing blue with red, but
> > with mistake.
> > Below are results of my testing with random color:
> > 11111111 11001100 10011001 - input color
> > 10011001 11001100 11111111 - result of my function (rgb2bgr)
> > 00000000 00110011 01100110 - result of utils_invert_color
> utils_invert_color() *inverts* a color, it doesn't transform RGB to BGR
> or something. It's used e.g. in the "invert syntax highlighting colors"
> feature. It's basically the C "~" operator. And if you expect this,
> you'll see it works just fine: 1 becomes 0 and 0 becomes 1.
> Not sure why we don't simply do ((~color) & 0xffffff), but that's just
> an implementation detail.
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