From 960663d476d8a1391b8bcc4424f3f716147068ab Mon Sep 17 00:00:00 2001 From: Irene Knapp Date: Wed, 11 Nov 2026 21:03:30 -0700 Subject: all the xcb wrapper types are in individual files now the trait inheritance structure isn't THAT convoluted, but having more than one of these in a file was obscuring things. Change-Id: I5132a6304796654d778d731be1ecb1c7b4e77120 Force-Push: yes --- src/x/color.rs | 49 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 49 insertions(+) create mode 100644 src/x/color.rs (limited to 'src/x/color.rs') diff --git a/src/x/color.rs b/src/x/color.rs new file mode 100644 index 0000000..10ad651 --- /dev/null +++ b/src/x/color.rs @@ -0,0 +1,49 @@ +/* Color management in X has become an obscure topic because everyone prefers + * to assume they have 24-bit direct. In dealing with it, [1] has been an + * important resource. + * + * [1] https://xcb.freedesktop.org/xlibtoxcbtranslationguide/ + */ +use crate::x::connection::*; +use crate::x::display::*; + +use xcb::x::{ AllocColor, Visualtype }; + + +pub trait DisplayColorExt: DisplayExt { + /* This is sufficiently obscure knowledge that it's worth keeping here + * even though it's unused. + */ + #[allow(dead_code)] + fn find_root_visual(&self) -> Option<&Visualtype> { + let visual_id = self.screen().root_visual(); + + for depth in self.screen().allowed_depths() { + for visual in depth.visuals() { + if visual_id == visual.visual_id() { + return Some(visual); + } + } + } + + None + } + + fn allocate_color(&self, red: u16, green: u16, blue: u16) + -> xcb::Result + { + let connection = self.connection(); + + let colormap = self.screen().default_colormap(); + + let cookie = connection.send_request(&AllocColor { + cmap: colormap, + red, green, blue, + }); + + Ok(connection.wait_for_reply(cookie)?.pixel()) + } +} + +impl DisplayColorExt for T { } + -- cgit 1.4.1