vulkan: use transfer queue for uploads

src/gfx_apis/vulkan/image.rs

@@ -58,10 +58,41 @@ pub struct VulkanImage {
     pub(super) image: Image,
     pub(super) is_undefined: Cell<bool>,
     pub(super) contents_are_undefined: Cell<bool>,
+    pub(super) queue_state: Cell<QueueState>,
     pub(super) ty: VulkanImageMemory,
     pub(super) bridge: Option<VulkanFramebufferBridge>,
 }
 
+#[derive(Copy, Clone, Eq, PartialEq, Debug)]
+pub enum QueueState {
+    Acquired { family: QueueFamily },
+    Releasing,
+    Released { to: QueueFamily },
+}
+
+#[derive(Copy, Clone, Eq, PartialEq, Debug)]
+pub enum QueueFamily {
+    Gfx,
+    Transfer,
+}
+
+impl QueueState {
+    pub fn acquire(self, new: QueueFamily) -> QueueTransfer {
+        match self {
+            QueueState::Acquired { family } if family == new => QueueTransfer::Unnecessary,
+            QueueState::Released { to } if to == new => QueueTransfer::Possible,
+            _ => QueueTransfer::Impossible,
+        }
+    }
+}
+
+#[derive(Copy, Clone, Eq, PartialEq, Debug)]
+pub enum QueueTransfer {
+    Unnecessary,
+    Possible,
+    Impossible,
+}
+
 pub enum VulkanImageMemory {
     DmaBuf(VulkanDmaBufImage),
     Internal(VulkanShmImage),
@@ -384,6 +415,9 @@ impl VulkanDmaBufImageTemplate {
             format: self.dmabuf.format,
             is_undefined: Cell::new(true),
             contents_are_undefined: Cell::new(false),
+            queue_state: Cell::new(QueueState::Acquired {
+                family: QueueFamily::Gfx,
+            }),
             bridge,
         }))
     }