Add Eq and Hash implementations to types used in draw calls (#1314)

* Add Eq and Hash implementations to various buffer and image types

* Changelog entry

* Add Eq and Hash to graphics pipelines too

* Changelog entry

* Remove Eq and Hash from dyn GraphicsPipelineAbstract, as the device cannot be checked

* Add Eq and Hash to GraphicsPipelineAbstract, include size in buffer equality

* Add Eq and Hash to descriptor sets

* Changelog entry

* Add Eq and Hash to Instance, check for it in Device

CHANGELOG_VULKANO.md

@@ -18,6 +18,12 @@
 - `Swapchain::acquire_next_image()`` now returns ``(image_id, suboptimal, aquire_future)``
     + *suboptimal indicates that the swapchain is usable, but should be recreated*
 - Fixed Join Future implementation to not submit joined command buffers twice.
+- The traits `GraphicsPipelineAbstract` and `DescriptorSet` now require `DeviceOwned`.
+- Added `PartialEq`, `Eq` and `Hash` implementations to all types involved in a draw call, including:
+  - `Instance`, `Device`, `GraphicsPipeline` and `dyn GraphicsPipelineAbstract`
+  - `UnsafeBuffer` and all types implementing `BufferAccess`
+  - `UnsafeImage`, `UnsafeImageView` and all types implementing `ImageAccess` or `ImageViewAccess`
+  - All types implementing `DescriptorSet`
 
 # Version 0.16.0 (2019-11-01)
 

vulkano/src/buffer/cpu_access.rs

@@ -19,6 +19,8 @@
 use smallvec::SmallVec;
 use std::error;
 use std::fmt;
+use std::hash::Hash;
+use std::hash::Hasher;
 use std::iter;
 use std::marker::PhantomData;
 use std::mem;
@@ -458,6 +460,30 @@ unsafe impl<T: ?Sized, A> DeviceOwned for CpuAccessibleBuffer<T, A> {
     }
 }
 
+impl<T: ?Sized, A> PartialEq for CpuAccessibleBuffer<T, A>
+    where T: 'static + Send + Sync
+{
+    #[inline]
+    fn eq(&self, other: &Self) -> bool {
+        self.inner() == other.inner() && self.size() == other.size()
+    }
+}
+
+impl<T: ?Sized, A> Eq for CpuAccessibleBuffer<T, A>
+    where T: 'static + Send + Sync
+{}
+
+impl<T: ?Sized, A> Hash for CpuAccessibleBuffer<T, A>
+    where T: 'static + Send + Sync
+{
+    #[inline]
+    fn hash<H: Hasher>(&self, state: &mut H) {
+        self.inner().hash(state);
+        self.size().hash(state);
+    }
+}
+
+
 /// Object that can be used to read or write the content of a `CpuAccessibleBuffer`.
 ///
 /// Note that this object holds a rwlock read guard on the chunk. If another thread tries to access

vulkano/src/buffer/cpu_pool.rs

@@ -8,6 +8,8 @@
 // according to those terms.
 
 use std::cmp;
+use std::hash::Hash;
+use std::hash::Hasher;
 use std::iter;
 use std::marker::PhantomData;
 use std::mem;
@@ -721,6 +723,29 @@ unsafe impl<T, A> DeviceOwned for CpuBufferPoolChunk<T, A>
     }
 }
 
+impl<T, A> PartialEq for CpuBufferPoolChunk<T, A>
+    where A: MemoryPool
+{
+    #[inline]
+    fn eq(&self, other: &Self) -> bool {
+        self.inner() == other.inner() && self.size() == other.size()
+    }
+}
+
+impl<T, A> Eq for CpuBufferPoolChunk<T, A>
+    where A: MemoryPool
+{}
+
+impl<T, A> Hash for CpuBufferPoolChunk<T, A>
+    where A: MemoryPool
+{
+    #[inline]
+    fn hash<H: Hasher>(&self, state: &mut H) {
+        self.inner().hash(state);
+        self.size().hash(state);
+    }
+}
+
 impl<T, A> Clone for CpuBufferPoolSubbuffer<T, A>
     where A: MemoryPool
 {
@@ -788,6 +813,29 @@ unsafe impl<T, A> DeviceOwned for CpuBufferPoolSubbuffer<T, A>
     }
 }
 
+impl<T, A> PartialEq for CpuBufferPoolSubbuffer<T, A>
+    where A: MemoryPool
+{
+    #[inline]
+    fn eq(&self, other: &Self) -> bool {
+        self.inner() == other.inner() && self.size() == other.size()
+    }
+}
+
+impl<T, A> Eq for CpuBufferPoolSubbuffer<T, A>
+    where A: MemoryPool
+{}
+
+impl<T, A> Hash for CpuBufferPoolSubbuffer<T, A>
+    where A: MemoryPool
+{
+    #[inline]
+    fn hash<H: Hasher>(&self, state: &mut H) {
+        self.inner().hash(state);
+        self.size().hash(state);
+    }
+}
+
 #[cfg(test)]
 mod tests {
     use buffer::CpuBufferPool;

vulkano/src/buffer/device_local.rs

@@ -14,6 +14,8 @@
 //! write simultaneously, or write and write simultaneously will block with a semaphore.
 
 use smallvec::SmallVec;
+use std::hash::Hash;
+use std::hash::Hasher;
 use std::marker::PhantomData;
 use std::mem;
 use std::sync::Arc;
@@ -284,3 +286,26 @@ unsafe impl<T: ?Sized, A> TypedBufferAccess for DeviceLocalBuffer<T, A>
 {
     type Content = T;
 }
+
+impl<T: ?Sized, A> PartialEq for DeviceLocalBuffer<T, A>
+    where T: 'static + Send + Sync
+{
+    #[inline]
+    fn eq(&self, other: &Self) -> bool {
+        self.inner() == other.inner() && self.size() == other.size()
+    }
+}
+
+impl<T: ?Sized, A> Eq for DeviceLocalBuffer<T, A>
+    where T: 'static + Send + Sync
+{}
+
+impl<T: ?Sized, A> Hash for DeviceLocalBuffer<T, A>
+    where T: 'static + Send + Sync
+{
+    #[inline]
+    fn hash<H: Hasher>(&self, state: &mut H) {
+        self.inner().hash(state);
+        self.size().hash(state);
+    }
+}

vulkano/src/buffer/immutable.rs

@@ -19,6 +19,8 @@
 //!
 
 use smallvec::SmallVec;
+use std::hash::Hash;
+use std::hash::Hasher;
 use std::marker::PhantomData;
 use std::mem;
 use std::sync::Arc;
@@ -377,6 +379,23 @@ unsafe impl<T: ?Sized, A> DeviceOwned for ImmutableBuffer<T, A> {
     }
 }
 
+impl<T: ?Sized, A> PartialEq for ImmutableBuffer<T, A> {
+    #[inline]
+    fn eq(&self, other: &Self) -> bool {
+        self.inner() == other.inner() && self.size() == other.size()
+    }
+}
+
+impl<T: ?Sized, A> Eq for ImmutableBuffer<T, A> {}
+
+impl<T: ?Sized, A> Hash for ImmutableBuffer<T, A> {
+    #[inline]
+    fn hash<H: Hasher>(&self, state: &mut H) {
+        self.inner().hash(state);
+        self.size().hash(state);
+    }
+}
+
 /// Access to the immutable buffer that can be used for the initial upload.
 //#[derive(Debug)]      // TODO:
 pub struct ImmutableBufferInitialization<T: ?Sized, A = PotentialDedicatedAllocation<StdMemoryPoolAlloc>> {
@@ -455,6 +474,23 @@ impl<T: ?Sized, A> Clone for ImmutableBufferInitialization<T, A> {
     }
 }
 
+impl<T: ?Sized, A> PartialEq for ImmutableBufferInitialization<T, A> {
+    #[inline]
+    fn eq(&self, other: &Self) -> bool {
+        self.inner() == other.inner() && self.size() == other.size()
+    }
+}
+
+impl<T: ?Sized, A> Eq for ImmutableBufferInitialization<T, A> {}
+
+impl<T: ?Sized, A> Hash for ImmutableBufferInitialization<T, A> {
+    #[inline]
+    fn hash<H: Hasher>(&self, state: &mut H) {
+        self.inner().hash(state);
+        self.size().hash(state);
+    }
+}
+
 #[cfg(test)]
 mod tests {
     use buffer::BufferUsage;

vulkano/src/buffer/slice.rs

@@ -7,6 +7,8 @@
 // notice may not be copied, modified, or distributed except
 // according to those terms.
 
+use std::hash::Hash;
+use std::hash::Hasher;
 use std::marker::PhantomData;
 use std::mem;
 use std::mem::MaybeUninit;
@@ -285,6 +287,29 @@ impl<T, B> From<BufferSlice<T, B>> for BufferSlice<[T], B> {
     }
 }
 
+impl<T: ?Sized, B> PartialEq for BufferSlice<T, B>
+    where B: BufferAccess
+{
+    #[inline]
+    fn eq(&self, other: &Self) -> bool {
+        self.inner() == other.inner() && self.size() == other.size()
+    }
+}
+
+impl<T: ?Sized, B> Eq for BufferSlice<T, B>
+    where B: BufferAccess
+{}
+
+impl<T: ?Sized, B> Hash for BufferSlice<T, B>
+    where B: BufferAccess
+{
+    #[inline]
+    fn hash<H: Hasher>(&self, state: &mut H) {
+        self.inner().hash(state);
+        self.size().hash(state);
+    }
+}
+
 /// Takes a `BufferSlice` that points to a struct, and returns a `BufferSlice` that points to
 /// a specific field of that struct.
 #[macro_export]

vulkano/src/buffer/sys.rs

@@ -27,6 +27,8 @@
 use smallvec::SmallVec;
 use std::error;
 use std::fmt;
+use std::hash::Hash;
+use std::hash::Hasher;
 use std::mem;
 use std::mem::MaybeUninit;
 use std::ptr;
@@ -338,6 +340,23 @@ impl Drop for UnsafeBuffer {
     }
 }
 
+impl PartialEq for UnsafeBuffer {
+    #[inline]
+    fn eq(&self, other: &Self) -> bool {
+        self.buffer == other.buffer && self.device == other.device
+    }
+}
+
+impl Eq for UnsafeBuffer {}
+
+impl Hash for UnsafeBuffer {
+    #[inline]
+    fn hash<H: Hasher>(&self, state: &mut H) {
+        self.buffer.hash(state);
+        self.device.hash(state);
+    }
+}
+
 #[derive(Debug, Copy, Clone)]
 pub struct SparseLevel {
     pub sparse: bool,

vulkano/src/buffer/traits.rs

@@ -8,6 +8,8 @@
 // according to those terms.
 
 use std::ops::Range;
+use std::hash::Hash;
+use std::hash::Hasher;
 
 use buffer::BufferSlice;
 use buffer::sys::UnsafeBuffer;
@@ -139,7 +141,7 @@ pub unsafe trait BufferAccess: DeviceOwned {
 }
 
 /// Inner information about a buffer.
-#[derive(Copy, Clone, Debug)]
+#[derive(Copy, Clone, Debug, PartialEq, Eq, Hash)]
 pub struct BufferInner<'a> {
     /// The underlying buffer object.
     pub buffer: &'a UnsafeBuffer,
@@ -213,3 +215,20 @@ unsafe impl<T> TypedBufferAccess for T
 {
     type Content = <T::Target as TypedBufferAccess>::Content;
 }
+
+impl PartialEq for dyn BufferAccess {
+    #[inline]
+    fn eq(&self, other: &Self) -> bool {
+        self.inner() == other.inner() && self.size() == other.size()
+    }
+}
+
+impl Eq for dyn BufferAccess {}
+
+impl Hash for dyn BufferAccess {
+    #[inline]
+    fn hash<H: Hasher>(&self, state: &mut H) {
+        self.inner().hash(state);
+        self.size().hash(state);
+    }
+}

vulkano/src/descriptor/descriptor_set/fixed_size_pool.rs

@@ -8,9 +8,12 @@
 // according to those terms.
 
 use crossbeam::queue::SegQueue;
+use std::hash::Hash;
+use std::hash::Hasher;
 use std::sync::Arc;
 
 use OomError;
+use VulkanObject;
 use buffer::BufferAccess;
 use buffer::BufferViewRef;
 use descriptor::descriptor::DescriptorDesc;
@@ -141,8 +144,7 @@ unsafe impl<R> DescriptorSet for FixedSizeDescriptorSet<R>
     }
 }
 
-unsafe impl<R> DescriptorSetDesc for FixedSizeDescriptorSet<R>
-{
+unsafe impl<R> DescriptorSetDesc for FixedSizeDescriptorSet<R> {
     #[inline]
     fn num_bindings(&self) -> usize {
         self.inner.num_bindings()
@@ -154,14 +156,37 @@ unsafe impl<R> DescriptorSetDesc for FixedSizeDescriptorSet<R>
     }
 }
 
-unsafe impl<R> DeviceOwned for FixedSizeDescriptorSet<R>
-{
+unsafe impl<R> DeviceOwned for FixedSizeDescriptorSet<R> {
     #[inline]
     fn device(&self) -> &Arc<Device> {
         self.inner.device()
     }
 }
 
+impl<R> PartialEq for FixedSizeDescriptorSet<R>
+    where R: PersistentDescriptorSetResources
+{
+    #[inline]
+    fn eq(&self, other: &Self) -> bool {
+        self.inner().internal_object() == other.inner().internal_object() &&
+        self.device() == other.device()
+    }
+}
+
+impl<R> Eq for FixedSizeDescriptorSet<R>
+    where R: PersistentDescriptorSetResources
+{}
+
+impl<R> Hash for FixedSizeDescriptorSet<R>
+    where R: PersistentDescriptorSetResources
+{
+    #[inline]
+    fn hash<H: Hasher>(&self, state: &mut H) {
+        self.inner().internal_object().hash(state);
+        self.device().hash(state);
+    }
+}
+
 // The fields of this struct can be considered as fields of the `FixedSizeDescriptorSet`. They are
 // in a separate struct because we don't want to expose the fact that we implement the
 // `DescriptorPool` trait.

vulkano/src/descriptor/descriptor_set/mod.rs

@@ -35,8 +35,13 @@
 //! - The `DescriptorSetsCollection` trait is implemented on collections of types that implement
 //!   `DescriptorSet`. It is what you pass to the draw functions.
 
+use std::hash::Hash;
+use std::hash::Hasher;
+
 use SafeDeref;
+use VulkanObject;
 use buffer::BufferAccess;
+use device::DeviceOwned;
 use descriptor::descriptor::DescriptorDesc;
 use image::ImageViewAccess;
 
@@ -77,7 +82,7 @@ mod unsafe_layout;
 /// Trait for objects that contain a collection of resources that will be accessible by shaders.
 ///
 /// Objects of this type can be passed when submitting a draw command.
-pub unsafe trait DescriptorSet: DescriptorSetDesc {
+pub unsafe trait DescriptorSet: DescriptorSetDesc + DeviceOwned {
     /// Returns the inner `UnsafeDescriptorSet`.
     fn inner(&self) -> &UnsafeDescriptorSet;
 
@@ -130,6 +135,24 @@ unsafe impl<T> DescriptorSet for T
     }
 }
 
+impl PartialEq for dyn DescriptorSet {
+    #[inline]
+    fn eq(&self, other: &Self) -> bool {
+        self.inner().internal_object() == other.inner().internal_object() &&
+        self.device() == other.device()
+    }
+}
+
+impl Eq for dyn DescriptorSet {}
+
+impl Hash for dyn DescriptorSet {
+    #[inline]
+    fn hash<H: Hasher>(&self, state: &mut H) {
+        self.inner().internal_object().hash(state);
+        self.device().hash(state);
+    }
+}
+
 /// Trait for objects that describe the layout of the descriptors of a set.
 pub unsafe trait DescriptorSetDesc {
     /// Returns the number of binding slots in the set.

vulkano/src/descriptor/descriptor_set/persistent.rs

@@ -9,6 +9,8 @@
 
 use std::error;
 use std::fmt;
+use std::hash::Hash;
+use std::hash::Hasher;
 use std::sync::Arc;
 
 use OomError;
@@ -130,6 +132,33 @@ unsafe impl<R, P> DeviceOwned for PersistentDescriptorSet<R, P>
     }
 }
 
+impl<R, P> PartialEq for PersistentDescriptorSet<R, P>
+    where P: DescriptorPoolAlloc,
+          R: PersistentDescriptorSetResources
+{
+    #[inline]
+    fn eq(&self, other: &Self) -> bool {
+        self.inner().internal_object() == other.inner().internal_object() &&
+        self.device() == other.device()
+    }
+}
+
+impl<R, P> Eq for PersistentDescriptorSet<R, P>
+    where P: DescriptorPoolAlloc,
+          R: PersistentDescriptorSetResources
+{}
+
+impl<R, P> Hash for PersistentDescriptorSet<R, P>
+    where P: DescriptorPoolAlloc,
+          R: PersistentDescriptorSetResources
+{
+    #[inline]
+    fn hash<H: Hasher>(&self, state: &mut H) {
+        self.inner().internal_object().hash(state);
+        self.device().hash(state);
+    }
+}
+
 /// Prototype of a `PersistentDescriptorSet`.
 ///
 /// The template parameter `R` is an unspecified type that represents the list of resources.

vulkano/src/device/mod.rs

@@ -96,6 +96,8 @@ use std::collections::hash_map::Entry;
 use std::error;
 use std::fmt;
 use std::hash::BuildHasherDefault;
+use std::hash::Hash;
+use std::hash::Hasher;
 use std::mem::MaybeUninit;
 use std::ops::Deref;
 use std::ptr;
@@ -539,6 +541,24 @@ impl Drop for Device {
     }
 }
 
+impl PartialEq for Device {
+    #[inline]
+    fn eq(&self, other: &Self) -> bool {
+        self.device == other.device && self.instance == other.instance
+    }
+}
+
+impl Eq for Device {}
+
+impl Hash for Device {
+    #[inline]
+    fn hash<H: Hasher>(&self, state: &mut H) {
+        self.device.hash(state);
+        self.instance.hash(state);
+    }
+}
+
+
 /// Implemented on objects that belong to a Vulkan device.
 ///
 /// # Safety

vulkano/src/image/attachment.rs

@@ -7,6 +7,8 @@
 // notice may not be copied, modified, or distributed except
 // according to those terms.
 
+use std::hash::Hash;
+use std::hash::Hasher;
 use std::iter::Empty;
 use std::sync::Arc;
 use std::sync::atomic::AtomicBool;
@@ -575,6 +577,28 @@ unsafe impl<F, A> ImageViewAccess for AttachmentImage<F, A>
     }
 }
 
+impl<F, A> PartialEq for AttachmentImage<F, A>
+    where F: 'static + Send + Sync
+{
+    #[inline]
+    fn eq(&self, other: &Self) -> bool {
+        ImageAccess::inner(self) == ImageAccess::inner(other)
+    }
+}
+
+impl<F, A> Eq for AttachmentImage<F, A>
+    where F: 'static + Send + Sync
+{}
+
+impl<F, A> Hash for AttachmentImage<F, A>
+    where F: 'static + Send + Sync
+{
+    #[inline]
+    fn hash<H: Hasher>(&self, state: &mut H) {
+        ImageAccess::inner(self).hash(state);
+    }
+}
+
 #[cfg(test)]
 mod tests {
     use super::AttachmentImage;

vulkano/src/image/immutable.rs

@@ -8,6 +8,8 @@
 // according to those terms.
 
 use smallvec::SmallVec;
+use std::hash::Hash;
+use std::hash::Hasher;
 use std::sync::Arc;
 use std::sync::atomic::AtomicBool;
 use std::sync::atomic::Ordering;
@@ -392,6 +394,28 @@ unsafe impl<F: 'static, A> ImageViewAccess for ImmutableImage<F, A>
     }
 }
 
+impl<F, A> PartialEq for ImmutableImage<F, A>
+    where F: 'static + Send + Sync
+{
+    #[inline]
+    fn eq(&self, other: &Self) -> bool {
+        ImageAccess::inner(self) == ImageAccess::inner(other)
+    }
+}
+
+impl<F, A> Eq for ImmutableImage<F, A>
+    where F: 'static + Send + Sync
+{}
+
+impl<F, A> Hash for ImmutableImage<F, A>
+    where F: 'static + Send + Sync
+{
+    #[inline]
+    fn hash<H: Hasher>(&self, state: &mut H) {
+        ImageAccess::inner(self).hash(state);
+    }
+}
+
 unsafe impl<F, A> ImageAccess for ImmutableImageInitialization<F, A>
     where F: 'static + Send + Sync
 {
@@ -457,3 +481,25 @@ unsafe impl<F, A> ImageAccess for ImmutableImageInitialization<F, A>
         self.image.initialized.store(true, Ordering::Relaxed);
     }
 }
+
+impl<F, A> PartialEq for ImmutableImageInitialization<F, A>
+    where F: 'static + Send + Sync
+{
+    #[inline]
+    fn eq(&self, other: &Self) -> bool {
+        ImageAccess::inner(self) == ImageAccess::inner(other)
+    }
+}
+
+impl<F, A> Eq for ImmutableImageInitialization<F, A>
+    where F: 'static + Send + Sync
+{}
+
+impl<F, A> Hash for ImmutableImageInitialization<F, A>
+    where F: 'static + Send + Sync
+{
+    #[inline]
+    fn hash<H: Hasher>(&self, state: &mut H) {
+        ImageAccess::inner(self).hash(state);
+    }
+}

vulkano/src/image/storage.rs

@@ -8,6 +8,8 @@
 // according to those terms.
 
 use smallvec::SmallVec;
+use std::hash::Hash;
+use std::hash::Hasher;
 use std::sync::Arc;
 use std::sync::atomic::AtomicUsize;
 use std::sync::atomic::Ordering;
@@ -308,6 +310,31 @@ unsafe impl<F, A> ImageViewAccess for StorageImage<F, A>
     }
 }
 
+impl<F, A> PartialEq for StorageImage<F, A>
+    where F: 'static + Send + Sync,
+          A: MemoryPool
+{
+    #[inline]
+    fn eq(&self, other: &Self) -> bool {
+        ImageAccess::inner(self) == ImageAccess::inner(other)
+    }
+}
+
+impl<F, A> Eq for StorageImage<F, A>
+    where F: 'static + Send + Sync,
+          A: MemoryPool
+{}
+
+impl<F, A> Hash for StorageImage<F, A>
+    where F: 'static + Send + Sync,
+          A: MemoryPool
+{
+    #[inline]
+    fn hash<H: Hasher>(&self, state: &mut H) {
+        ImageAccess::inner(self).hash(state);
+    }
+}
+
 #[cfg(test)]
 mod tests {
     use super::StorageImage;

vulkano/src/image/swapchain.rs

@@ -7,6 +7,8 @@
 // notice may not be copied, modified, or distributed except
 // according to those terms.
 
+use std::hash::Hash;
+use std::hash::Hasher;
 use std::sync::Arc;
 
 use buffer::BufferAccess;
@@ -210,3 +212,19 @@ unsafe impl<W> ImageViewAccess for SwapchainImage<W> {
         true
     }
 }
+
+impl<W> PartialEq for SwapchainImage<W> {
+    #[inline]
+    fn eq(&self, other: &Self) -> bool {
+        ImageAccess::inner(self) == ImageAccess::inner(other)
+    }
+}
+
+impl<W> Eq for SwapchainImage<W> {}
+
+impl<W> Hash for SwapchainImage<W> {
+    #[inline]
+    fn hash<H: Hasher>(&self, state: &mut H) {
+        ImageAccess::inner(self).hash(state);
+    }
+}

vulkano/src/image/sys.rs

@@ -16,6 +16,8 @@
 use smallvec::SmallVec;
 use std::error;
 use std::fmt;
+use std::hash::Hash;
+use std::hash::Hasher;
 use std::mem;
 use std::mem::MaybeUninit;
 use std::ops::Range;
@@ -827,6 +829,23 @@ impl Drop for UnsafeImage {
     }
 }
 
+impl PartialEq for UnsafeImage {
+    #[inline]
+    fn eq(&self, other: &Self) -> bool {
+        self.image == other.image && self.device == other.device
+    }
+}
+
+impl Eq for UnsafeImage {}
+
+impl Hash for UnsafeImage {
+    #[inline]
+    fn hash<H: Hasher>(&self, state: &mut H) {
+        self.image.hash(state);
+        self.device.hash(state);
+    }
+}
+
 /// Error that can happen when creating an instance.
 #[derive(Clone, Debug, PartialEq, Eq)]
 pub enum ImageCreationError {
@@ -1123,6 +1142,23 @@ impl Drop for UnsafeImageView {
     }
 }
 
+impl PartialEq for UnsafeImageView {
+    #[inline]
+    fn eq(&self, other: &Self) -> bool {
+        self.view == other.view && self.device == other.device
+    }
+}
+
+impl Eq for UnsafeImageView {}
+
+impl Hash for UnsafeImageView {
+    #[inline]
+    fn hash<H: Hasher>(&self, state: &mut H) {
+        self.view.hash(state);
+        self.device.hash(state);
+    }
+}
+
 #[cfg(test)]
 mod tests {
     use std::iter::Empty;

vulkano/src/image/traits.rs

@@ -7,6 +7,9 @@
 // notice may not be copied, modified, or distributed except
 // according to those terms.
 
+use std::hash::Hash;
+use std::hash::Hasher;
+
 use buffer::BufferAccess;
 use format::ClearValue;
 use format::Format;
@@ -232,7 +235,7 @@ pub unsafe trait ImageAccess {
 }
 
 /// Inner information about an image.
-#[derive(Copy, Clone, Debug)]
+#[derive(Copy, Clone, Debug, PartialEq, Eq, Hash)]
 pub struct ImageInner<'a> {
     /// The underlying image object.
     pub image: &'a UnsafeImage,
@@ -311,6 +314,22 @@ unsafe impl<T> ImageAccess for T
     }
 }
 
+impl PartialEq for dyn ImageAccess {
+    #[inline]
+    fn eq(&self, other: &Self) -> bool {
+        self.inner() == other.inner()
+    }
+}
+
+impl Eq for dyn ImageAccess {}
+
+impl Hash for dyn ImageAccess {
+    #[inline]
+    fn hash<H: Hasher>(&self, state: &mut H) {
+        self.inner().hash(state);
+    }
+}
+
 /// Wraps around an object that implements `ImageAccess` and modifies the initial layout
 /// requirement to be either `Undefined` or `Preinitialized`.
 #[derive(Debug, Copy, Clone)]
@@ -373,6 +392,28 @@ unsafe impl<I> ImageAccess for ImageAccessFromUndefinedLayout<I>
     }
 }
 
+impl<I> PartialEq for ImageAccessFromUndefinedLayout<I>
+    where I: ImageAccess
+{
+    #[inline]
+    fn eq(&self, other: &Self) -> bool {
+        self.inner() == other.inner()
+    }
+}
+
+impl<I> Eq for ImageAccessFromUndefinedLayout<I>
+    where I: ImageAccess
+{}
+
+impl<I> Hash for ImageAccessFromUndefinedLayout<I>
+    where I: ImageAccess
+{
+    #[inline]
+    fn hash<H: Hasher>(&self, state: &mut H) {
+        self.inner().hash(state);
+    }
+}
+
 /// Extension trait for images. Checks whether the value `T` can be used as a clear value for the
 /// given image.
 // TODO: isn't that for image views instead?
@@ -481,6 +522,22 @@ unsafe impl<T> ImageViewAccess for T
     }
 }
 
+impl PartialEq for dyn ImageViewAccess {
+    #[inline]
+    fn eq(&self, other: &Self) -> bool {
+        self.inner() == other.inner()
+    }
+}
+
+impl Eq for dyn ImageViewAccess {}
+
+impl Hash for dyn ImageViewAccess {
+    #[inline]
+    fn hash<H: Hasher>(&self, state: &mut H) {
+        self.inner().hash(state);
+    }
+}
+
 pub unsafe trait AttachmentImageView: ImageViewAccess {
     fn accept(&self, initial_layout: ImageLayout, final_layout: ImageLayout) -> bool;
 }

vulkano/src/instance/instance.rs

@@ -13,6 +13,8 @@ use std::error;
 use std::ffi::CStr;
 use std::ffi::CString;
 use std::fmt;
+use std::hash::Hash;
+use std::hash::Hasher;
 use std::mem;
 use std::ops::Deref;
 use std::ptr;
@@ -496,6 +498,22 @@ impl Drop for Instance {
     }
 }
 
+impl PartialEq for Instance {
+    #[inline]
+    fn eq(&self, other: &Self) -> bool {
+        self.instance == other.instance
+    }
+}
+
+impl Eq for Instance {}
+
+impl Hash for Instance {
+    #[inline]
+    fn hash<H: Hasher>(&self, state: &mut H) {
+        self.instance.hash(state);
+    }
+}
+
 // Same as Cow but less annoying.
 enum OwnedOrRef<T: 'static> {
     Owned(T),

vulkano/src/pipeline/graphics_pipeline/mod.rs

@@ -8,6 +8,8 @@
 // according to those terms.
 
 use std::fmt;
+use std::hash::Hash;
+use std::hash::Hasher;
 use std::marker::PhantomData;
 use std::ptr;
 use std::sync::Arc;
@@ -74,6 +76,7 @@ pub struct GraphicsPipeline<VertexDefinition, Layout, RenderP> {
     num_viewports: u32,
 }
 
+#[derive(PartialEq, Eq, Hash)]
 struct Inner {
     pipeline: vk::Pipeline,
     device: Arc<Device>,
@@ -324,7 +327,7 @@ impl Drop for Inner {
 /// object.
 /// When using this trait `AutoCommandBufferBuilder::draw*` calls will need the buffers to be
 /// wrapped in a `vec!()`.
-pub unsafe trait GraphicsPipelineAbstract: PipelineLayoutAbstract + RenderPassAbstract + VertexSource<Vec<Arc<dyn BufferAccess + Send + Sync>>> {
+pub unsafe trait GraphicsPipelineAbstract: PipelineLayoutAbstract + RenderPassAbstract + VertexSource<Vec<Arc<dyn BufferAccess + Send + Sync>>> + DeviceOwned {
     /// Returns an opaque object that represents the inside of the graphics pipeline.
     fn inner(&self) -> GraphicsPipelineSys;
 
@@ -474,6 +477,52 @@ unsafe impl<T> GraphicsPipelineAbstract for T
     }
 }
 
+impl<Mv, L, Rp> PartialEq for GraphicsPipeline<Mv, L, Rp>
+    where L: PipelineLayoutAbstract,
+          Rp: RenderPassAbstract,
+          Mv: VertexSource<Vec<Arc<dyn BufferAccess + Send + Sync>>>
+{
+    #[inline]
+    fn eq(&self, other: &Self) -> bool {
+        self.inner == other.inner
+    }
+}
+
+impl<Mv, L, Rp> Eq for GraphicsPipeline<Mv, L, Rp>
+    where L: PipelineLayoutAbstract,
+          Rp: RenderPassAbstract,
+          Mv: VertexSource<Vec<Arc<dyn BufferAccess + Send + Sync>>>
+{}
+
+impl<Mv, L, Rp> Hash for GraphicsPipeline<Mv, L, Rp>
+    where L: PipelineLayoutAbstract,
+          Rp: RenderPassAbstract,
+          Mv: VertexSource<Vec<Arc<dyn BufferAccess + Send + Sync>>>
+{
+    #[inline]
+    fn hash<H: Hasher>(&self, state: &mut H) {
+        self.inner.hash(state);
+    }
+}
+
+impl PartialEq for dyn GraphicsPipelineAbstract {
+    #[inline]
+    fn eq(&self, other: &Self) -> bool {
+        GraphicsPipelineAbstract::inner(self).0 == GraphicsPipelineAbstract::inner(other).0 &&
+        DeviceOwned::device(self) == DeviceOwned::device(other)
+    }
+}
+
+impl Eq for dyn GraphicsPipelineAbstract {}
+
+impl Hash for dyn GraphicsPipelineAbstract {
+    #[inline]
+    fn hash<H: Hasher>(&self, state: &mut H) {
+        GraphicsPipelineAbstract::inner(self).0.hash(state);
+        DeviceOwned::device(self).hash(state);
+    }
+}
+
 /// Opaque object that represents the inside of the graphics pipeline.
 #[derive(Debug, Copy, Clone)]
 pub struct GraphicsPipelineSys<'a>(vk::Pipeline, PhantomData<&'a ()>);