all: refactor to cargo workspace, remove config shared library, remove protocol perms, add dpms cli (#7)

crates/gfx-types/Cargo.toml

@@ -0,0 +1,8 @@
+[package]
+name = "jay-gfx-types"
+version.workspace = true
+edition.workspace = true
+license.workspace = true
+
+[dependencies]
+uapi = "0.2.13"

crates/gfx-types/src/lib.rs

@@ -0,0 +1,38 @@
+use {
+    std::{cell::Cell, error::Error, rc::Rc},
+    uapi::OwnedFd,
+};
+
+#[derive(Copy, Clone, Debug, Eq, PartialEq, Hash, Default)]
+pub enum AlphaMode {
+    #[default]
+    PremultipliedElectrical,
+    PremultipliedOptical,
+    Straight,
+}
+
+pub trait ShmMemory {
+    fn len(&self) -> usize;
+    fn safe_access(&self) -> ShmMemoryBacking;
+    fn access(&self, f: &mut dyn FnMut(&[Cell<u8>])) -> Result<(), Box<dyn Error + Sync + Send>>;
+}
+
+pub enum ShmMemoryBacking {
+    Ptr(*const [Cell<u8>]),
+    Fd(Rc<OwnedFd>, usize),
+}
+
+impl ShmMemory for Vec<Cell<u8>> {
+    fn len(&self) -> usize {
+        self.len()
+    }
+
+    fn safe_access(&self) -> ShmMemoryBacking {
+        ShmMemoryBacking::Ptr(&**self)
+    }
+
+    fn access(&self, f: &mut dyn FnMut(&[Cell<u8>])) -> Result<(), Box<dyn Error + Sync + Send>> {
+        f(self);
+        Ok(())
+    }
+}