vulkano/CHANGELOG_VULKANO.md

Unreleased

• Breaking Vulkano-shaders now checks if the device supports the shader's SPIR-V version, when loading the shader.
• Breaking (but unlikely) Vulkano-shaders now compiles to SPIR-V 1.0 by default. If your shader needs features only available in a higher version, you can specify the target version on the shader! macro with the new vulkan_version: "major.minor" and spirv_version: "major.minor" arguments.
• Added DeviceExtensions::khr_spirv_1_4, which allows SPIR-V 1.4 shaders in Vulkan 1.1.
• Added FunctionPointers::api_version to query the highest supported instance version.
• Added Instance::api_version and Device::api_version to return the actual supported Vulkan version. These may differ between instance and device, and be lower than what FunctionPointers::api_version and PhysicalDevice::api_version return (currently never higher than 1.1, but this may change in the future).
• Fixed the issue when creating a buffer with exportable fd on Linux(see to #1545).

Version 0.23.0 (2021-04-10)

• Breaking Changes to command buffers:
  • AutoCommandBuffer and the CommandBuffer trait have been split in two, one for primary and the other for secondary command buffers. AutoCommandBufferBuilder remains one type, but has a type parameter for the level of command buffer it will be creating, and some of its methods are only implemented for builders that create PrimaryAutoCommandBuffer.
  • The Flags enum is renamed to CommandBufferUsage, and is exported from the main command_buffer module. The None variant is renamed to MultipleSubmit.
  • Simplified the number of constructors on AutoCommandBufferBuilder by adding a CommandBufferUsage parameter.
  • Kind has been renamed to CommandBufferLevel, and for secondary command buffers it now contains a single CommandBufferInheritance value.
  • CommandBufferInheritance::occlusion_query and UnsafeCommandBufferBuilder::begin_query now take QueryControlFlags instead of a boolean.
• Breaking The non-default constructors of ImageView have been replaced with a builder, created with ImageView::start(image).
• Breaking Added support for component mapping/swizzling on image views.
  • image::Swizzle is moved and renamed to image::view::ComponentMapping. It now has an is_identity method.
  • A non-default component mapping can now be specified for image views, via the new builder. A ComponentMapping parameter has been added to UnsafeImageView as well.
  • The identity_swizzle method on the ImageViewAbstract trait has been replaced with component_mapping, which returns a ComponentMapping directly.
  • Storage image and input attachment descriptors now check for identity swizzling when being built.
• Breaking Major rearranging of framebuffer and render pass-related types:
  • The framebuffer module is renamed to render_pass.
  • RenderPassDesc is now a struct, not a trait. The methods have been simplified, returning a slice reference to the attachments, subpasses and dependencies.
    • Renamed: AttachmentDescription > AttachmentDesc, PassDescription > SubpassDesc, PassDependencyDescription > SubpassDependencyDesc.
    • EmptySinglePassRenderPassDesc is replaced with the RenderPassDesc::empty constructor, or its Default implementation.
    • The RenderPassCompatible, RenderPassDescClearValues and RenderPassSubpassInterface traits are removed, their functionality is moved to RenderPassDesc.
  • RenderPass takes a concrete RenderPassDesc value for construction, and no longer has a type parameter.
    • The RenderPassAbstract trait is removed.
    • GraphicsPipeline and Framebuffer no longer have a render pass type parameter.
    • GraphicsPipelineAbstract and FramebufferAbstract have trait methods to retrieve the render pass instead.
  • The ordered_passes_renderpass! and single_pass_renderpass! macros are unchanged externally.
• Support for queries:
  • Breaking UnsafeQueryPool, UnsafeQuery and UnsafeQueriesRange have Unsafe removed from their names.
  • Breaking QueriesRange is now represented with a standard Rust Range in its API.
  • Breaking The secondary command buffer constructors that have parameters for queries will check if the corresponding features are enabled, and return a different error type.
  • Removed OcclusionQueriesPool, which was incomplete and never did anything useful.
  • get_results has been added to QueriesRange, to copy query results to the CPU.
  • The following functions have been added to both SyncCommandBufferBuilder and AutoCommandBufferBuilder: begin_query (still unsafe), end_query (safe), write_timestamp (still unsafe), copy_query_pool_results (safe), reset_command_pool (still unsafe).
  • Better documentation of everything in the query module.
  • An example demonstrating occlusion queries.
• Breaking Improved the handling of image aspects a little, with the enum ImageAspect and the struct ImageAspects. UnsafeCommandBufferBuilderImageAspect has been removed.
• Breaking Removed the separate structs for each image format. Now, only the Format enum exists.
  • Traits that no longer make sense in this context have been removed: FormatDesc, the Possible*FormatDesc traits, StrongStorage.
  • In types that had a type parameter for the format type, it has been removed.
  • AcceptsPixels has been converted to Pixel, which is implemented on the pixel type rather than on the format type.
• Breaking shader! will generate descriptor information for all variables declared in the shader module, even if they are not used. This reverts the default behavior from the last release.
  • Breaking Added the exact_entrypoint_interface option to shader! to force vulkano to only generate descriptor information for variables that are used. (the default behavior from the last release)
• Breaking AccessFlagBits is renamed to AccessFlags.
• Breaking Minor refactor of UnsafeBuffer:
  • Replaced the various usage functions with a single usage function, mirroring the change made earlier to UnsafeImage.
  • The SparseLevel::sparse member is removed, and UnsafeBuffer::new takes Option<SparseLevel> instead.
• Breaking Swapchain is now constructed using a builder. Swapchain::start will start building a new blank swapchain. Calling recreate on an existing swapchain will create a builder filled with all the properties of the old swapchain.
• Added two methods to Format: planes to query the number of planes in the format, and aspects to query what aspects an image of this type has.
• The deprecated cause trait function on Vulkano error types is replaced with source.
• Fixed bug in descriptor array layers check when the image is a cubemap.
• Vulkano-shaders: Fixed and refined the generation of the readonly descriptor attribute. It should now correctly mark uniforms and sampled images as read-only, but storage buffers and images only if explicitly marked as readonly in the shader.
• Vulkano-shaders: Added support for StoragePushConstant8 SPIR-V capability.
• Fixed a bug which caused a segfault when extending memory allocation info in DeviceMemoryBuilder
• BufferlessDefinition and BufferlessVertices now derive Copy and Clone. This allows GraphicsPipelineBuilders that have not yet defined a vertex buffer type to be cloned.
• Various functions for converting to/from Vulkan flags have been consolidated into implementations of the standard From trait.
• Export root-level entry_point method on loader::FunctionPointers type.
• Add few more InstanceExtensions from KHR and EXT.

Version 0.22.0 (2021-03-31)

• Breaking Updated all code to Rust 2018 edition.
• Breaking DeviceMemoryBuilder::new() takes in memory_index rather than MemoryType.
• Fixed shader! generated descriptor set layouts for shader modules with multiple entrypoints.
  • Breaking Prefixed shader! generated descriptor set Layout structs with the name of the entrypoint the layout belongs to. For shaders generated from GLSL source, this means Layout has been renamed to MainLayout.
  • Breaking shader! will no longer generate descriptor information for variables that are declared but not used in a shader.
• Breaking shader! now accepts structs in shader interfaces decorated with BufferBlock rather than Block.
• Fixed missing barriers in dispatch calls
  • Breaking shader! no longer marks descriptor sets as readonly as a fallback when it doesn't know
    • Breaking The keyword readonly might need to be added in front of the buffer keyword in GLSL files to get them working again
• Breaking Changes to image types:
  • Image types no longer implement ImageViewAccess.
  • Dimensions is removed. Image constructors now take ImageDimensions.
  • ImageDimensions no longer has the cubemap_compatible member. Instead, several image constructors take ImageCreateFlags which specifies this aspect.
  • Replaced the various functions of UnsafeImage to query format features and usage with two that simply return Formatfeatures and ImageUsage.
• Breaking Changes to image view handling:
  • Created a new image::view module for all image view related things.
  • Introduced a new ImageView type, a safe wrapper around UnsafeImageView.
  • The ImageViewAccess trait is renamed to ImageViewAbstract, some methods added, removed or renamed. ImageView implements this trait.
  • UnsafeImageView no longer holds image usage information, nor does it check for valid usage.
• Breaking UnsafeCommandBuffer and SyncCommandBuffer and their corresponding builders and other related types no longer have a type parameter for the command pool allocation, and no longer keep the command pool alive. Their constructors now take an &UnsafeCommandPoolAlloc. Users must now ensure that the pool allocation outlives the command buffers and their builders (AutoCommandBuffer does this itself).
• Breaking The CommandBuffer trait no longer has the PoolAlloc associated type, and has four new methods: num_buffers, buffer, num_images and image.
• Breaking structures passed to ImmutableBuffer::from_data and CpuAccessibleBuffer::from_data must implement Copy to ensure soundness of these functions
• Replaced deprecated compare_and_swap with compare_exchange.
• UnsafeCommandPoolAlloc now implements DeviceOwned.
• Allow const usage of features and BufferUsage.
• Opaque fd and dma-buf import support on Linux.
• DeviceMemoryMapping to separate device memory and mappings.
• Added external memory support for DeviceLocalBuffer for Linux.
• Implemented synchronization for SyncCommandBufferBuilder::execute_commands.
• AutoCommandBufferBuilder::execute_commands is now fully safe to use.
• SyncCommandBufferBuilder now becomes poisoned when it returns an error, to prevent using the builder in an inconsistent state.
• Added a dispatch_indirect command to AutoCommandBufferBuilder.

Version 0.21.0 (2021-03-05)

• Breaking Message::layer_prefix turned to Option to prevent segfaults when Vulkan message didn't provide pMessageIdName value
• Breaking On AutoCommandBufferBuilder, methods that bind a descriptor set now take a dynamic_offsets parameter
• Breaking On AutoCommandBufferBuilder and SyncCommandBufferBuilder, the update_buffer method now takes data by reference
• Breaking Made PipelineLayoutDescTweaks public, for use with compute pipelines
• Added support for ImageAspect and YV12/NV12 formats, for use with the UnsafeImage API.
• Added basic VK_KHR_external_memory, VK_KHR_external_memory_fd, and VK_EXT_external_memory_dma_buf support.
• Fixed potential segmentation fault in ComputePipeline when referencing PipelineCache objects.
• Fixed race condition in StandardCommandPool when allocating buffers.
• Fixed potential stack overflow error in loading large shaders by storing the bytecode as static.
• Fixed descriptor set layouts with arrays containing more than one element triggering unreachable code.
• Fixed panic on some machines when calling Surface::capabilities
• Added basic support and safety checks for dynamic uniform/storage buffers
• Updated dependencies:
  • crossbeam 0.7 -> 0.8
  • half 1.6 -> 1.7
  • shaderc 0.6 -> 0.7
  • smallvec 1.4 -> 1.6
  • cgmath 0.17 -> 0.18 (for examples)
  • png 0.15 -> 0.16 (for examples)
  • time 0.1 -> 0.2 (for examples)
• Added VK_KHR_portability_subset device extension.
• Added DeviceExtensions::required_extensions function that returns a set of available extensions required to create Device on this platform.
• FormatFeatures now implements Copy.
• Removed the AttachmentImageView trait, which didn't appear to be used for anything anyway.

Version 0.20.0 (2020-12-26)

• Breaking The ImmutableImage::from_iter and ImmutableImage::from_buffer can build Mipmaps
• Breaking CpuAccessibleBuffer now uses RwLock from parking_lot.
• Breaking The Kind and SubpassContents types have been moved to the root of the command_buffer module.
• Breaking On AutoCommandBufferBuilder, the methods begin_render_pass and next_subpass now take SubpassContents instead of a boolean value.
• Breaking The CommandBuffer trait now has an additional required method, kind.
• Breaking Update dependency winit 0.22 -> 0.24
• Breaking Added an Option to the ComputePipeline constructor to enable pipeline caching.
• Add support for 8bit storage.
• Some safety checks have been added to execute_commands/execute_commands_from_vec on AutoCommandBufferBuilder, but not everything is checked yet so it's still unsafe to call.
• Added two vulkano-win features raw-window-handle_ and winit_ to be able to use vulkano without winit.
• Added function to create surface from RawWindowHandle.
• Added a properties method to Format.
• Added additional device feature flags for enabling SPIR-V related capabilities.
• Added method copy_buffer_dimensions that allows copying parts of buffers containing arrays.
• Added debug_marker_begin, debug_marker_end and debug_marker_insert to AutoCommandBufferBuilder.
• Fixed surface creation function on Windows(PR #1410).
• Travis CI Linux Nightly job temporary disabled until #1423 resolved.
• Renamed feature from shader_f3264 to shader_float64.
• Added method build_with_cache to the GraphicsPipelineBuilder that enables pipeline caching.
• Check usage bits on image when creating image view.
• Fixing an assertion panic in the SyncCommandBuffer. If the buffer encountered an error while locking the necessary resources, it would unlock all previously locked resources. Images were unlocked incorrectly and an assert in the image unlock function would panic.
• Added support for including precompiled shaders in vulkano-shaders using the bytes option.
• Added an option for Vulkano-Shaders macro to automatically generate standard traits(Default, PartialEq, etc) implementations for Rust types generated from the Shader types, and to derive these structs with external traits.
• Fixed clear Cubemap and CubemapArray framebuffer attachment dimensions; previously only 1/6th of the layers in each of these image layouts were actually considered by the framebuffer (for clearing and rendering). This seems to have been a result of the difference between Dimensions and ImageDimensions.

Version 0.19.0 (2020-06-01)

• Breaking AutoCommandBufferBuilder methods now take a mutable reference to self instead of taking ownership
• Update smallvec 1.2 -> 1.4
• Added additional ImageUsage constructor functions, color_attachment, depth_stencil_attachment, transient_color_attachment & transient_depth_stencil_attachment.
• Update dependency half 1.5 -> 1.6
• Update MacOS dependency metal 0.17 -> 0.18
• Added additional checks around image/device compatibility.
• Fixed all warnings as of Rust 1.43.1
• Provides new API to fetch additional information of the Physical Device from the PhysicalDeviceProperties2KHR structure whenever it possible. In the current implementation only subgroupSize property is fetching. This interface can be extended in the future to obtain more metadata depending on community needs.
• dynamic-local-size compute shader example added showing how to utilize subgroupSize to compute and set shader's local size in run time.
• Fixed Vulkano Shaders bug when compute shader local group layout values bound to specialization constants. Now it is possible to define the layout in form of layout(local_size_x_id = 12, local_size_y_id = 13, local_size_z = 1) in; and then set the values as SpecializationConstants {constant_12: 8, constant_13: 4, ...}.
• Allow applications to access the instance and device pointers
• Add a helper function '.boxed()' on the GpuFuture that is short for Box::new(yourFuture) as Box<dyn GpuFuture>

Version 0.18.0 (2020-03-11)

• Breaking Update dependency winit 0.21 -> 0.22
• Update dependency half 1.4 -> 1.5
• Update dependency smallvec 0.6 -> 1.2

Version 0.17.0 (2020-02-09)

• Breaking Swapchain::recreate_with_dimension() is now Swapchain::recreate_with_dimensions()
• Breaking Sync::SharingMode::Exclusive(queue_family: u32) is now Sync::SharingMode::Exclusive.
• Breaking Added Swapchain::with_old_swapchain() - same as previous Swapchain::new(), if an oldswapchain needs to be used
• Breaking Swapchain::new() now doesnt need to have the old_swapchain parameter anymore but requires the ColorSpace
• Breaking Decouple descriptor sets from pipeline
• Breaking Update Winit to 0.21.0
• Breaking Add host_cached field to all CpuAccessibleBuffer initializers to allow the user to perfer host cached memory.
• Breaking Added fullscreen_exclusive field to Swapchain initializers to allow the user to specify how fullscreen exclusivity should be handled.
  • Swapchain methods added: Swapchain::acquire_fullscreen_exclusive(), Swapchain::release_fullscreen_exclusive(), and Swapchain::is_fullscreen_exclusive()
• Add function execute_commands_from_vec to handle submission of multiple secondary command buffers.
• Allow DebugCallback to be sent between threads
• Pipeline barriers are now correctly inserted when a resource is used more than two times.
• Update MacOS dependency cocoa to 0.20
• Fixed code generated by shader! macro so that SSBO's are supported again (broken in 0.16.0).
• Added Swapchain::surface() - which returns the saved surface
• Propogate new lines correctly in shader compile errors.
• Queue and QueueFamily now implement PartialEq and Eq
• `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)

• Fixed bug in examples causing OutOfHostMemory errors
• Replaced VK_EXT_debug_report VK_EXT_debug_marker with VK_EXT_debug_utils.
• Update MacOS dependencies metal to 0.17 and cocoa to 0.19
• Added dynamic stencil elements to DynamicState
• Fixed ImageDimensions::mipmap_dimensions and max_mipmaps in cases where the original size is not a power of two.
• Shader includes now work on Windows.
• Breaking Change Shader include directories passed to the shader! macro are now relative to the crates Cargo.toml
• Add support for VK_KHR_16bit_storage and VK_KHR_storage_buffer_storage_class device extensions.
• Update dependencies: lazy_static, half, syn, quote & proc-macro2
• Swapchain can now be recreated with dimensions of corresponding surface using recreate().
• Added raw_loaded_extensions() to Instance to allow querying of all extensions, not just known ones.
• Breaking Change loaded_extensions() on Instance no longer returns a reference.
• Add support for GLSL macro defines to the shader! macro.
• Switch to Vulkan 1.1 and inherently SpirV 1.3 (shaderc default version for vulkan 1.1)

Version 0.15.0 (2019-10-18)

Yanked

Version 0.14.0 (2019-08-17)

• Update shaderc to 0.6. This again allows to use locally installed libraries which reduces the build-time significantly on Arch/Voidlinux (see https://github.com/google/shaderc-rs/issues/58)
• Removed faulty debug_assert in SwapchainAcquireFuture::drop.
• Compressed texture formats can now be uploaded using ImmutableImage::from_iter, ImmutableImage::from_buffer, AutoCommandBuilder::copy_buffer_to_image_dimensions, and AutoCommandBuilder::copy_buffer_to_image.

Version 0.13.0 (2019-07-02)

This is an emergency breaking breaking change. It fixes Undefined Behaviour that was preventing the compilation of Vulkano on the latest rust nightlies.

• Structs that have the impl_vertex macro applied to them, now also need to #[derive(Default)].

Version 0.12.0 (2019-05-24)

• Update shaderc to 0.5. New shaderc has improved pre-built options for libshaderc that significantly reduce package build time and are appropriate for use in CI
• QueueFamily::explicitly_supports_tranfers only returns true if vk::QUEUE_TRANSFER_BIT is set instead of also always returning true. Removed supports_transfers.
• Update to winit 0.19
• Add support for #include "..." and #include <...> directives within source files.
• Add a union method for the extensions types.
• Make BufferUsage derive PartialEq and Eq
• Fix a compiler error in struct code generated by the shader! macro.
• Improve inference of image layout transitions and in turn image memory barrier behaviour.

Version 0.11.1 (2018-11-16)

• Expose CopyImageError and DrawIndexedIndirectError.

Version 0.11.0 (2018-11-08) (yanked because vk-sys 0.3.4 was accidentally breaking vulkano 0.10)

• Update to winit 0.18
• Export features and device extensions from the device module instead of the instance module
  • instance::Features -> device::Features
  • instance::DeviceExtensions -> device::DeviceExtensions
  • instance::RawDeviceExtensions -> device::RawDeviceExtensions
• Added vulkano_shaders::shader! proc macro, use this instead of vulkano_shader_deriver::VulkanoShaders.
• The entire vulkano_shader_derive crate is deprecated.
• vulkano_shaders::{reflect, compile, Error} are no longer public.
• Remove vulkano_shaders::build_glsl_shaders
• Removed mir support, as it is being removed from the vulkan spec.
• Split PersistentDescriptorSetError::MissingUsage into MissingImageUsage and MissingBufferUsage each with a matching enum indicating the usage that was missing.
• Fix instance_count when using draw_index with instance buffers
• Added a reinterpret function to BufferSlice
• Made AttributeInfo derive Copy, Clone and Debug
• Use google/shaderc for shader compilation
• Reject generation of rust types for SPIR-V arrays that would have incorrect array stride.
• Removed the Layout prefix of the descriptions used for a render pass.
• Implemented DescriptorSetCollection for Vec<T> which allows easier use of construction them for usage when drawing.

Version 0.10.0 (2018-08-10)

• Use dynamically loaded libvulkan like on other platforms instead of linking to MoltenVK on macOS
• Updated winit to version 0.17.
• Allow custom implementations of RenderPassDesc to specify VK_SUBPASS_EXTERNAL as a dependency source or destination
• Added vulkano_win::create_vk_surface which allows creating a surface safely without taking ownership of the window.
• AutoCommandBufferBuilder::draw and friends no longer consume the DynamicState argument, allowing reuse between calls.
• Instance::new and Instance::with_loader now take in the layers as an iterator of borrowed strs, not of references to borrowed strs.

Version 0.9.0 (2018-03-13)

• Updated winit to version 0.11.

Version 0.8.0 (2018-03-11)

• Changed ShaderInterfaceMismatchError to be more verbose.
• Allow depth/stencil images to be used with AutoCommandBufferBuilder::copy_image_to_buffer()
• Allow Surface to own the window it references.
• Clear value validation for AutoCommandBufferBuilder::begin_render_pass()
• Fix occasional truncation of glslang_validator when glsl-to-spirv is rebuilt
• Fix linking against MoltenVK >= 0.19.0
• Fix panic on DeviceLost error after resizing swapchain on nvidia/amd hardware
• Added AutoCommandBufferBuilder::copy_image
• Added VulkanObject::TYPE to look up the DebugReportObjectTypeEXT of an object
• Added Device::set_object_name and Device::set_object_name_raw
• Added GraphicsPipelineBuilder::with_auto_layout to simplify use of dynamic buffers.

Version 0.7.3 (2018-02-10)

Yanked

Version 0.7.2 (2017-10-09)

• Allow impl_vertex! to support generic structs.
• Added GraphicsPipelineBuilder::with_pipeline_layout.
• Fixed creating a buffer view not checking the min_texel_buffer_offset_alignment limit.
• Added support for loading the VK_EXT_debug_marker extension and adding debug markers to UnsafeCommandBufferBuilder
• Changed GraphicsPipelineBuilder to default to a buffer-less vertex input.
• Deprecated pipeline::input_assembly::InputAssembly.

Version 0.7.1 (2017-09-28)

• Fixed an HiDPI scaling issue on MacOS in vulkano-win.
• Fixed le() and ge() for DescriptorsCount, which also fixes a potential memory leak when allocating descriptor sets.
• Fixed the ordered_passes_renderpass! macro not working properly when using resolve.
• Added an optional resolve entry in pass for single_pass_renderpass!, for resolving multisampled attachments into non-multisampled attachments.
• Fixed the value of rasterizationSamples not corresponding to the render pass.
• Added GraphicsPipelineBuilder::sample_shading_disabled, sample_shading_enabled, alpha_to_coverage_disabled, alpha_to_coverage_enabled, alpha_to_one_disabled and alpha_to_one_enabled. Added GraphicsPipelineCreationError::SampleRateShadingFeatureNotEnabled and AlphaToOneFeatureNotEnabled.
• Deprecated pipeline::multisample::Multisample.

Version 0.7.0 (2017-09-21)

• Added RuntimePipelineDesc, an implementation of PipelineLayoutDesc that makes creating custom layouts easier.
• Changed CpuBufferPool::next() and chunk() to return a Result in case of an error when allocating or mapping memory.
• Changed CommandBufferExecError::AccessError to provide a hint of where the error occurs.
• Added vulkano::pipeline::vertex::BufferlessDefinition and BufferlessVertices to enable bufferless drawing.
• Changed ImageAccess::try_gpu_lock and unlock() to verify whether the image layout is correct, especially at the first usage of an image.
• Changed BufferAccess::conflict_* and ImageAccess::conflict_* to forbid querying a specific range of the resource.
• Fixed layers argument validation in Swapchain::new_inner.
• Added a 32-bit word constructor for ShaderModule (ShaderModule::from_words).
• Changed the various is_superset_of functions to return a Result instead of a bool.

Version 0.6.2 (2017-09-06)

• Added checking compatibility between the descriptor sets and the pipeline object when adding a draw or compute command.
• Fixed several bugs in the validation checks of blit_image.
• Fixed blit_image, copy_buffer_to_image and copy_image_to_buffer not taking the mipmap level into account when checking for the correct image dimensions.
• Added ImageDimensions::mipmap_dimensions() and ImageDimensions::num_mipmaps().
• Added an implementation of DeviceOwned for QueuesIter and Queue.
• Fixed the standard command pool and descriptor pool being destroyed too often.
• Added #[allow(non_snake_case)] to structs generated by vulkano-shaders.