Package org.lwjgl.vulkan
Class NVDedicatedAllocation
- java.lang.Object
-
- org.lwjgl.vulkan.NVDedicatedAllocation
-
public final class NVDedicatedAllocation extends java.lang.Object
This extension allows device memory to be allocated for a particular buffer or image resource, which on some devices can significantly improve the performance of that resource. Normal device memory allocations must support memory aliasing and sparse binding, which could interfere with optimizations like framebuffer compression or efficient page table usage. This is important for render targets and very large resources, but need not (and probably should not) be used for smaller resources that can benefit from suballocation.This extension adds a few small structures to resource creation and memory allocation: a new structure that flags whether am image/buffer will have a dedicated allocation, and a structure indicating the image or buffer that an allocation will be bound to.
Examples
// Create an image with // VkDedicatedAllocationImageCreateInfoNV::dedicatedAllocation // set to VK_TRUE VkDedicatedAllocationImageCreateInfoNV dedicatedImageInfo = { VK_STRUCTURE_TYPE_DEDICATED_ALLOCATION_IMAGE_CREATE_INFO_NV, // sType NULL, // pNext VK_TRUE, // dedicatedAllocation }; VkImageCreateInfo imageCreateInfo = { VK_STRUCTURE_TYPE_IMAGE_CREATE_INFO, // sType &dedicatedImageInfo // pNext // Other members set as usual }; VkImage image; VkResult result = vkCreateImage( device, &imageCreateInfo, NULL, // pAllocator &image); VkMemoryRequirements memoryRequirements; vkGetImageMemoryRequirements( device, image, &memoryRequirements); // Allocate memory with VkDedicatedAllocationMemoryAllocateInfoNV::image // pointing to the image we are allocating the memory for VkDedicatedAllocationMemoryAllocateInfoNV dedicatedInfo = { VK_STRUCTURE_TYPE_DEDICATED_ALLOCATION_MEMORY_ALLOCATE_INFO_NV, // sType NULL, // pNext image, // image VK_NULL_HANDLE, // buffer }; VkMemoryAllocateInfo memoryAllocateInfo = { VK_STRUCTURE_TYPE_MEMORY_ALLOCATE_INFO, // sType &dedicatedInfo, // pNext memoryRequirements.size, // allocationSize FindMemoryTypeIndex(memoryRequirements.memoryTypeBits), // memoryTypeIndex }; VkDeviceMemory memory; vkAllocateMemory( device, &memoryAllocateInfo, NULL, // pAllocator &memory); // Bind the image to the memory vkBindImageMemory( device, image, memory, 0);
- Name String
VK_NV_dedicated_allocation
- Extension Type
- Device extension
- Registered Extension Number
- 27
- Revision
- 1
- Extension and Version Dependencies
- Requires Vulkan 1.0
- Deprecation state
- Deprecated by VK_KHR_dedicated_allocation extension
- Which in turn was promoted to Vulkan 1.1
- Deprecated by VK_KHR_dedicated_allocation extension
- Contact
- Jeff Bolz jeffbolznv
- Last Modified Date
- 2016-05-31
- IP Status
- No known IP claims.
- Contributors
- Jeff Bolz, NVIDIA
-
-
Field Summary
Fields Modifier and Type Field Description static java.lang.String
VK_NV_DEDICATED_ALLOCATION_EXTENSION_NAME
The extension name.static int
VK_NV_DEDICATED_ALLOCATION_SPEC_VERSION
The extension specification version.static int
VK_STRUCTURE_TYPE_DEDICATED_ALLOCATION_BUFFER_CREATE_INFO_NV
VK_STRUCTURE_TYPE_DEDICATED_ALLOCATION_IMAGE_CREATE_INFO_NV
VK_STRUCTURE_TYPE_DEDICATED_ALLOCATION_MEMORY_ALLOCATE_INFO_NVExtendsVkStructureType
.
-
-
-
Field Detail
-
VK_NV_DEDICATED_ALLOCATION_SPEC_VERSION
The extension specification version.
-
VK_NV_DEDICATED_ALLOCATION_EXTENSION_NAME
The extension name.
-
-