AuroraMiddleware/VulkanMemoryAllocator
1
0
Fork 0
mirror of https://github.com/GPUOpen-LibrariesAndSDKs/VulkanMemoryAllocator synced 2024-11-05 04:10:06 +00:00
Code Issues Projects Releases Wiki Activity

Support VK_KHR_buffer_device_address but not VK_EXT_buffer_device_address

Browse Source 
To avoid mess in the code. They are not identical! "EXT" version lacks flag VK_MEMORY_ALLOCATE_DEVICE_ADDRESS_BIT* flag.

Refers to #56
This commit is contained in:
Adam Sawicki 2020-03-25 10:34:05 +01:00
parent 204a810449
commit 3d1ce4ebb8
2 changed files with 15 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
README.md
View File

@ -50,7 +50,7 @@ Additional features:
- VK_EXT_memory_budget: Used internally if available to query for current usage and budget. If not available, it falls back to an estimation based on memory heap sizes.
- VK_KHR_dedicated_allocation: Just enable it and it will be used automatically by the library.
- VK_AMD_device_coherent_memory
- VK_EXT_buffer_device_address / VK_KHR_buffer_device_address
- VK_KHR_buffer_device_address
- Defragmentation of GPU and CPU memory: Let the library move data around to free some memory blocks and make your allocations better compacted.
- Lost allocations: Allocate memory with appropriate flags and let the library remove allocations that are not used for many frames to make room for new ones.
- Statistics: Obtain detailed statistics about the amount of memory used, unused, number of allocated blocks, number of allocations etc. - globally, per memory heap, and per memory type.

28
src/vk_mem_alloc.h
View File

@ -1729,24 +1729,24 @@ accompanying this library.
\page enabling_buffer_device_address Enabling buffer device address
Device extensions VK_EXT_buffer_device_address / VK_KHR_buffer_device_address
Device extension VK_KHR_buffer_device_address
allow to fetch raw GPU pointer to a buffer and pass it for usage in a shader code.
They are promoted to core Vulkan 1.2.
It is promoted to core Vulkan 1.2.
If you want to use this feature in connection with VMA, follow these steps:
\section enabling_buffer_device_address_initialization Initialization
1) (For Vulkan version < 1.2) Call `vkEnumerateDeviceExtensionProperties` for the physical device.
Check if the extension is supported - if returned array of `VkExtensionProperties` contains "VK_EXT_buffer_device_address"
or "VK_KHR_buffer_device_address".
Check if the extension is supported - if returned array of `VkExtensionProperties` contains
"VK_KHR_buffer_device_address".
2) Call `vkGetPhysicalDeviceFeatures2` for the physical device instead of old `vkGetPhysicalDeviceFeatures`.
Attach additional structure `VkPhysicalDeviceBufferDeviceAddressFeatures*` to `VkPhysicalDeviceFeatures2::pNext` to be returned.
Check if the device feature is really supported - check if `VkPhysicalDeviceBufferDeviceAddressFeatures*::bufferDeviceAddress` is true.
3) (For Vulkan version < 1.2) While creating device with `vkCreateDevice`, enable this extension - add "VK_EXT_buffer_device_address"
or "VK_KHR_buffer_device_address" to the list passed as `VkDeviceCreateInfo::ppEnabledExtensionNames`.
3) (For Vulkan version < 1.2) While creating device with `vkCreateDevice`, enable this extension - add
"VK_KHR_buffer_device_address" to the list passed as `VkDeviceCreateInfo::ppEnabledExtensionNames`.
4) While creating the device, also don't set `VkDeviceCreateInfo::pEnabledFeatures`.
Fill in `VkPhysicalDeviceFeatures2` structure instead and pass it as `VkDeviceCreateInfo::pNext`.
@ -1759,11 +1759,11 @@ to VmaAllocatorCreateInfo::flags.
\section enabling_buffer_device_address_usage Usage
After following steps described above, you can create buffers with `VK_BUFFER_USAGE_SHADER_DEVICE_ADDRESS_BIT` using VMA.
The library automatically adds `VK_MEMORY_ALLOCATE_DEVICE_ADDRESS_BIT_KHR` to
After following steps described above, you can create buffers with `VK_BUFFER_USAGE_SHADER_DEVICE_ADDRESS_BIT*` using VMA.
The library automatically adds `VK_MEMORY_ALLOCATE_DEVICE_ADDRESS_BIT*` to
allocated memory blocks wherever it might be needed.
Please note that the library supports only `VK_BUFFER_USAGE_SHADER_DEVICE_ADDRESS_BIT`.
Please note that the library supports only `VK_BUFFER_USAGE_SHADER_DEVICE_ADDRESS_BIT*`.
The second part of this functionality related to "capture and replay" is not supported,
as it is intended for usage in debugging tools like RenderDoc, not in everyday Vulkan usage.
@ -1916,7 +1916,7 @@ available through VmaAllocatorCreateInfo::pRecordSettings.
// Defined to 1 when VK_KHR_buffer_device_address device extension or equivalent core Vulkan 1.2 feature is defined in its headers.
#if !defined(VMA_BUFFER_DEVICE_ADDRESS)
#if VK_KHR_buffer_device_address || VK_EXT_buffer_device_address || VMA_VULKAN_VERSION >= 1002000
#if VK_KHR_buffer_device_address || VMA_VULKAN_VERSION >= 1002000
#define VMA_BUFFER_DEVICE_ADDRESS 1
#else
#define VMA_BUFFER_DEVICE_ADDRESS 0
@ -2061,12 +2061,12 @@ typedef enum VmaAllocatorCreateFlagBits {
You may set this flag only if you:
1. (For Vulkan version < 1.2) Found as available and enabled device extension
VK_EXT_buffer_device_address or VK_KHR_buffer_device_address.
Those extensions are promoted to core Vulkan 1.2.
VK_KHR_buffer_device_address.
This extension is promoted to core Vulkan 1.2.
2. Found as available and enabled device feature `VkPhysicalDeviceBufferDeviceAddressFeatures*::bufferDeviceAddress`.
When this flag is set, you can create buffers with `VK_BUFFER_USAGE_SHADER_DEVICE_ADDRESS_BIT` using VMA.
The library automatically adds `VK_MEMORY_ALLOCATE_DEVICE_ADDRESS_BIT_KHR` to
When this flag is set, you can create buffers with `VK_BUFFER_USAGE_SHADER_DEVICE_ADDRESS_BIT*` using VMA.
The library automatically adds `VK_MEMORY_ALLOCATE_DEVICE_ADDRESS_BIT*` to
allocated memory blocks wherever it might be needed.
For more information, see documentation chapter \ref enabling_buffer_device_address.