Change FramebufferAbstract trait to be faster

vulkano/src/command_buffer/synced.rs

@@ -613,14 +613,14 @@ impl<P> SyncCommandBufferBuilder<P> {
                     where F: FramebufferAbstract + Send + Sync + 'static
                 {
                     fn image(&self, num: usize) -> &ImageAccess {
-                        self.0.attachments()[num].parent() // TODO: slow
+                        self.0.attached_image_view(num).unwrap().parent()
                     }
                 }
                 Box::new(Fin(self.framebuffer))
             }
 
             fn image(&self, num: usize) -> &ImageAccess {
-                self.framebuffer.attachments()[num].parent() // TODO: slow
+                self.framebuffer.attached_image_view(num).unwrap().parent()
             }
         }
 

vulkano/src/framebuffer/attachments_list.rs

@@ -6,7 +6,7 @@
 // at your option. All files in the project carrying such
 // notice may not be copied, modified, or distributed except
 // according to those terms.
-
+
 use SafeDeref;
 use image::ImageViewAccess;
 use std::sync::Arc;
@@ -16,8 +16,9 @@ use std::sync::Arc;
 /// A list of attachments.
 // TODO: rework this trait
 pub unsafe trait AttachmentsList {
-    // TODO: meh for API
+    fn num_attachments(&self) -> usize;
-    fn as_image_view_accesses(&self) -> Vec<&ImageViewAccess>;
+
+    fn as_image_view_access(&self, index: usize) -> Option<&ImageViewAccess>;
 }
 
 unsafe impl<T> AttachmentsList for T
@@ -25,22 +26,37 @@ unsafe impl<T> AttachmentsList for T
           T::Target: AttachmentsList
 {
     #[inline]
-    fn as_image_view_accesses(&self) -> Vec<&ImageViewAccess> {
+    fn num_attachments(&self) -> usize {
-        (**self).as_image_view_accesses()
+        (**self).num_attachments()
+    }
+
+    #[inline]
+    fn as_image_view_access(&self, index: usize) -> Option<&ImageViewAccess> {
+        (**self).as_image_view_access(index)
     }
 }
 
 unsafe impl AttachmentsList for () {
     #[inline]
-    fn as_image_view_accesses(&self) -> Vec<&ImageViewAccess> {
+    fn num_attachments(&self) -> usize {
-        vec![]
+        0
+    }
+
+    #[inline]
+    fn as_image_view_access(&self, _: usize) -> Option<&ImageViewAccess> {
+        None
     }
 }
 
 unsafe impl AttachmentsList for Vec<Arc<ImageViewAccess + Send + Sync>> {
     #[inline]
-    fn as_image_view_accesses(&self) -> Vec<&ImageViewAccess> {
+    fn num_attachments(&self) -> usize {
-        self.iter().map(|p| &**p as &ImageViewAccess).collect()
+        self.len()
+    }
+
+    #[inline]
+    fn as_image_view_access(&self, index: usize) -> Option<&ImageViewAccess> {
+        self.get(index).map(|v| &**v as &_)
     }
 }
 
@@ -49,9 +65,16 @@ unsafe impl<A, B> AttachmentsList for (A, B)
           B: ImageViewAccess
 {
     #[inline]
-    fn as_image_view_accesses(&self) -> Vec<&ImageViewAccess> {
+    fn num_attachments(&self) -> usize {
-        let mut list = self.0.as_image_view_accesses();
+        self.0.num_attachments() + 1
-        list.push(&self.1);
+    }
-        list
+
+    #[inline]
+    fn as_image_view_access(&self, index: usize) -> Option<&ImageViewAccess> {
+        if index == self.0.num_attachments() {
+            Some(&self.1)
+        } else {
+            self.0.as_image_view_access(index)
+        }
     }
 }

vulkano/src/framebuffer/framebuffer.rs

@@ -376,8 +376,8 @@ unsafe impl<Rp, A> FramebufferAbstract for Framebuffer<Rp, A>
     }
 
     #[inline]
-    fn attachments(&self) -> Vec<&ImageViewAccess> {
+    fn attached_image_view(&self, index: usize) -> Option<&ImageViewAccess> {
-        self.resources.as_image_view_accesses()
+        self.resources.as_image_view_access(index)
     }
 }
 

vulkano/src/framebuffer/traits.rs

@@ -28,9 +28,10 @@ pub unsafe trait FramebufferAbstract: RenderPassAbstract {
     /// Returns the width, height and array layers of the framebuffer.
     fn dimensions(&self) -> [u32; 3];
 
-    /// Returns all the attachments of the framebuffer.
+    /// Returns the attachment of the framebuffer with the given index.
-    // TODO: meh for trait object
+    ///
-    fn attachments(&self) -> Vec<&ImageViewAccess>;
+    /// If the `index` is not between `0` and `num_attachments`, then `None` should be returned.
+    fn attached_image_view(&self, index: usize) -> Option<&ImageViewAccess>;
 
     /// Returns the width of the framebuffer in pixels.
     #[inline]
@@ -66,8 +67,8 @@ unsafe impl<T> FramebufferAbstract for T
     }
 
     #[inline]
-    fn attachments(&self) -> Vec<&ImageViewAccess> {
+    fn attached_image_view(&self, index: usize) -> Option<&ImageViewAccess> {
-        FramebufferAbstract::attachments(&**self)
+        (**self).attached_image_view(index)
     }
 }