gfx: move shared memory contract into types crate

Cargo.lock

@@ -855,6 +855,9 @@ dependencies = [
 [[package]]
 name = "jay-gfx-types"
 version = "0.1.0"
+dependencies = [
+ "uapi",
+]
 
 [[package]]
 name = "jay-io-uring"

gfx-types/Cargo.toml

@@ -5,3 +5,4 @@ edition = "2024"
 license = "GPL-3.0-only"
 
 [dependencies]
+uapi = "0.2.13"

gfx-types/src/lib.rs

@@ -1,3 +1,8 @@
+use {
+    std::{cell::Cell, error::Error, rc::Rc},
+    uapi::OwnedFd,
+};
+
 #[derive(Copy, Clone, Debug, Eq, PartialEq, Hash, Default)]
 pub enum AlphaMode {
     #[default]
@@ -5,3 +10,29 @@ pub enum AlphaMode {
     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(())
+    }
+}

src/gfx_api.rs

@@ -47,7 +47,7 @@ use {
     uapi::{OwnedFd, c},
 };
 
-pub use jay_gfx_types::AlphaMode;
+pub use jay_gfx_types::{AlphaMode, ShmMemory, ShmMemoryBacking};
 
 #[derive(Copy, Clone, Debug, Hash, Eq, PartialEq, Linearize)]
 pub enum GfxApi {
@@ -798,32 +798,6 @@ pub struct PendingShmTransfer {
     id: u64,
 }
 
-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(())
-    }
-}
-
 pub trait AsyncShmGfxTexture: GfxTexture {
     fn staging_size(&self) -> usize {
         0