VK_EXT_multi_draw

Other Extension Metadata

Last Modified Date

2021-05-19

Interactions and External Dependencies

• Interacts with Vulkan 1.1.
• Interacts with VK_KHR_shader_draw_parameters.

IP Status

No known IP claims.

Contributors

• Mike Blumenkrantz, VALVE
• Piers Daniell, NVIDIA
• Faith Ekstrand, INTEL
• Spencer Fricke, SAMSUNG
• Ricardo Garcia, IGALIA
• Jon Leech, KHRONOS
• Stu Smith, AMD

Description

Processing multiple draw commands in sequence incurs measurable overhead within drivers due to repeated state checks and updates during dispatch. This extension enables passing the entire sequence of draws directly to the driver in order to avoid any such overhead, using an array of VkMultiDrawInfoEXT or VkMultiDrawIndexedInfoEXT structs with vkCmdDrawMultiEXT or vkCmdDrawMultiIndexedEXT, respectively. These functions could be used any time multiple draw commands are being recorded without any state changes between them in order to maximize performance.

New Commands

• vkCmdDrawMultiEXT
• vkCmdDrawMultiIndexedEXT

New Structures

• VkMultiDrawIndexedInfoEXT
• VkMultiDrawInfoEXT
• Extending VkPhysicalDeviceFeatures2, VkDeviceCreateInfo:
  • VkPhysicalDeviceMultiDrawFeaturesEXT
• Extending VkPhysicalDeviceProperties2:
  • VkPhysicalDeviceMultiDrawPropertiesEXT

New Enum Constants

• VK_EXT_MULTI_DRAW_EXTENSION_NAME
• VK_EXT_MULTI_DRAW_SPEC_VERSION
• Extending VkStructureType:
  • VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_MULTI_DRAW_FEATURES_EXT
  • VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_MULTI_DRAW_PROPERTIES_EXT

New or Modified Built-In Variables

• (modified)DrawIndex

Version History

• Revision 1, 2021-01-20 (Mike Blumenkrantz)
  • Initial version