[dependencies]
gpu-allocator = "0.27.0"
This crate provides a fully written in Rust memory allocator for Vulkan, DirectX 12 and Metal.
gpu-allocator
recently migrated from winapi to windows-rs but still provides convenient helpers to convert to and from winapi types, enabled when compiling with the public-winapi
crate feature.
use gpu_allocator::vulkan::*;
let mut allocator = Allocator::new(&AllocatorCreateDesc {
instance,
device,
physical_device,
debug_settings: Default::default(),
buffer_device_address: true, // Ideally, check the BufferDeviceAddressFeatures struct.
allocation_sizes: Default::default(),
});
use gpu_allocator::vulkan::*;
use gpu_allocator::MemoryLocation;
// Setup vulkan info
let vk_info = vk::BufferCreateInfo::default()
.size(512)
.usage(vk::BufferUsageFlags::STORAGE_BUFFER);
let buffer = unsafe { device.create_buffer(&vk_info, None) }.unwrap();
let requirements = unsafe { device.get_buffer_memory_requirements(buffer) };
let allocation = allocator
.allocate(&AllocationCreateDesc {
name: "Example allocation",
requirements,
location: MemoryLocation::CpuToGpu,
linear: true, // Buffers are always linear
allocation_scheme: AllocationScheme::GpuAllocatorManaged,
}).unwrap();
// Bind memory to the buffer
unsafe { device.bind_buffer_memory(buffer, allocation.memory(), allocation.offset()).unwrap() };
// Cleanup
allocator.free(allocation).unwrap();
unsafe { device.destroy_buffer(buffer, None) };
use gpu_allocator::d3d12::*;
let mut allocator = Allocator::new(&AllocatorCreateDesc {
device: ID3D12DeviceVersion::Device(device),
debug_settings: Default::default(),
allocation_sizes: Default::default(),
});
use gpu_allocator::d3d12::*;
use gpu_allocator::MemoryLocation;
let buffer_desc = Direct3D12::D3D12_RESOURCE_DESC {
Dimension: Direct3D12::D3D12_RESOURCE_DIMENSION_BUFFER,
Alignment: 0,
Width: 512,
Height: 1,
DepthOrArraySize: 1,
MipLevels: 1,
Format: Dxgi::Common::DXGI_FORMAT_UNKNOWN,
SampleDesc: Dxgi::Common::DXGI_SAMPLE_DESC {
Count: 1,
Quality: 0,
},
Layout: Direct3D12::D3D12_TEXTURE_LAYOUT_ROW_MAJOR,
Flags: Direct3D12::D3D12_RESOURCE_FLAG_NONE,
};
let allocation_desc = AllocationCreateDesc::from_d3d12_resource_desc(
&allocator.device(),
&buffer_desc,
"Example allocation",
MemoryLocation::GpuOnly,
);
let allocation = allocator.allocate(&allocation_desc).unwrap();
let mut resource: Option<Direct3D12::ID3D12Resource> = None;
let hr = unsafe {
device.CreatePlacedResource(
allocation.heap(),
allocation.offset(),
&buffer_desc,
Direct3D12::D3D12_RESOURCE_STATE_COMMON,
None,
&mut resource,
)
}?;
// Cleanup
drop(resource);
allocator.free(allocation).unwrap();
use gpu_allocator::metal::*;
let mut allocator = Allocator::new(&AllocatorCreateDesc {
device: device.clone(),
debug_settings: Default::default(),
allocation_sizes: Default::default(),
});
use gpu_allocator::metal::*;
use gpu_allocator::MemoryLocation;
let allocation_desc = AllocationCreateDesc::buffer(
&device,
"Example allocation",
512, // size in bytes
MemoryLocation::GpuOnly,
);
let allocation = allocator.allocate(&allocation_desc).unwrap();
let resource = allocation.make_buffer().unwrap();
// Cleanup
drop(resource);
allocator.free(&allocation).unwrap();
The MSRV for this crate and the vulkan
, d3d12
and metal
features is Rust 1.70. Any other features such as the visualizer
(with all the egui
dependencies) may have a higher requirement and are not tested in our CI.
Licensed under either of
at your option.
Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.