Fix behaviour when TrueColor / 24 bit depth is not available (#114)

* Fix regression introduced in c7ca547 which made nsxiv not start in
  non-TrueColor X server.
* Introduce a new fix for embedding into tabbed-alpha. 
* Fixes a visual glitch from original sxiv when drawing transparent images in 8
  bit depth. In 8 bit PseudoColor, `.pixel` is just an index into the 256
  defined colors and thus trying to extract rgb bits from it would result in
  visual glitch. The values `.color.red` on the other hand and so on are always
  integers between 0 and 0xFFFF representing the color as expected.
* Use XColor for win_bg/fg and mrk_fg

Co-authored-by: NRK <nrk@disroot.org>

1 files changed, 3 insertions, 3 deletions

diff --git a/nsxiv.h b/nsxiv.h
index 6ae2289..d65875b 100644
--- a/nsxiv.h
+++ b/nsxiv.h
@@ -416,9 +416,9 @@ struct win {
 	Window xwin;
 	win_env_t env;
 
-	unsigned long win_bg;
-	unsigned long win_fg;
-	unsigned long mrk_fg;
+	XColor win_bg;
+	XColor win_fg;
+	XColor mrk_fg;
 #if HAVE_LIBFONTS
 	XftColor bar_bg;
 	XftColor bar_fg;