gpu-allocator 0.4.0

This crate provides a fully written in Rust memory allocator for Vulkan, and will provide one for DirectX 12 in the future.

Setting up the Vulkan memory allocator

use ash::version::{DeviceV1_0, EntryV1_0, InstanceV1_0};
use ash::vk;

let mut allocator = VulkanAllocator::new(&VulkanAllocatorCreateDesc {
instance,
device,
physical_device,
debug_settings: Default::default(),
});

Simple Vulkan allocation example

// Setup vulkan info
let vk_info = vk::BufferCreateInfo::builder()
.size(512)
.usage(vk::BufferUsageFlags::STORAGE_BUFFER);

let buffer = unsafe { device.create_buffer(&vk_info, None) }?;
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
})?;

// Bind memory to the buffer
unsafe { device.bind_buffer_memory(buffer, allocation.memory(), allocation.offset())? };

// Cleanup
allocator.free(allocation)?;
unsafe { device.destroy_buffer(buffer, None) };