Package org.lwjgl.vulkan

Class KHRDrawIndirectCount

java.lang.Object

org.lwjgl.vulkan.KHRDrawIndirectCount

public class KHRDrawIndirectCount
extends java.lang.Object

This extension is based off the VK_AMD_draw_indirect_count extension. This extension allows an application to source the number of draws for indirect drawing calls from a buffer.

Applications might want to do culling on the GPU via a compute shader prior to drawing. This enables the application to generate an arbitrary number of drawing commands and execute them without host intervention.

Promotion to Vulkan 1.2

All functionality in this extension is included in core Vulkan 1.2, with the KHR suffix omitted. However, if Vulkan 1.2 is supported and this extension is not, the entry points CmdDrawIndirectCount and CmdDrawIndexedIndirectCount are optional. The original type, enum and command names are still available as aliases of the core functionality.

VK_KHR_draw_indirect_count

Name String

VK_KHR_draw_indirect_count

Extension Type

Device extension

Registered Extension Number

170

Revision

1

Extension and Version Dependencies

• Requires Vulkan 1.0

Deprecation state

• Promoted to Vulkan 1.2

Contact

• Piers Daniell pdaniell-nv

Other Extension Metadata

Last Modified Date

2017-08-25

Interactions and External Dependencies

• Promoted to Vulkan 1.2 Core

IP Status

No known IP claims.

Contributors

• Matthaeus G. Chajdas, AMD
• Derrick Owens, AMD
• Graham Sellers, AMD
• Daniel Rakos, AMD
• Dominik Witczak, AMD
• Piers Daniell, NVIDIA

Field Summary

Fields

Modifier and Type	Field	Description
static java.lang.String	VK_KHR_DRAW_INDIRECT_COUNT_EXTENSION_NAME	The extension name.
static int	VK_KHR_DRAW_INDIRECT_COUNT_SPEC_VERSION	The extension specification version.

Method Summary

Modifier and Type	Method	Description
static void	vkCmdDrawIndexedIndirectCountKHR(org.lwjgl.vulkan.VkCommandBuffer commandBuffer, long buffer, long offset, long countBuffer, long countBufferOffset, int maxDrawCount, int stride)	See CmdDrawIndexedIndirectCount.
static void	vkCmdDrawIndirectCountKHR(org.lwjgl.vulkan.VkCommandBuffer commandBuffer, long buffer, long offset, long countBuffer, long countBufferOffset, int maxDrawCount, int stride)	See CmdDrawIndirectCount.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

VK_KHR_DRAW_INDIRECT_COUNT_SPEC_VERSION

public static final int VK_KHR_DRAW_INDIRECT_COUNT_SPEC_VERSION

The extension specification version.

See Also:

Constant Field Values

VK_KHR_DRAW_INDIRECT_COUNT_EXTENSION_NAME

public static final java.lang.String VK_KHR_DRAW_INDIRECT_COUNT_EXTENSION_NAME

The extension name.

See Also:

Constant Field Values

Method Detail

vkCmdDrawIndirectCountKHR

public static void vkCmdDrawIndirectCountKHR(org.lwjgl.vulkan.VkCommandBuffer commandBuffer,
                                             long buffer,
                                             long offset,
                                             long countBuffer,
                                             long countBufferOffset,
                                             int maxDrawCount,
                                             int stride)

See CmdDrawIndirectCount.

Parameters:

commandBuffer - the command buffer into which the command is recorded.

buffer - the buffer containing draw parameters.

offset - the byte offset into buffer where parameters begin.

countBuffer - the buffer containing the draw count.

countBufferOffset - the byte offset into countBuffer where the draw count begins.

maxDrawCount - specifies the maximum number of draws that will be executed. The actual number of executed draw calls is the minimum of the count specified in countBuffer and maxDrawCount.

stride - the byte stride between successive sets of draw parameters.

vkCmdDrawIndexedIndirectCountKHR

public static void vkCmdDrawIndexedIndirectCountKHR(org.lwjgl.vulkan.VkCommandBuffer commandBuffer,
                                                    long buffer,
                                                    long offset,
                                                    long countBuffer,
                                                    long countBufferOffset,
                                                    int maxDrawCount,
                                                    int stride)

See CmdDrawIndexedIndirectCount.

Parameters:

commandBuffer - the command buffer into which the command is recorded.

buffer - the buffer containing draw parameters.

offset - the byte offset into buffer where parameters begin.

countBuffer - the buffer containing the draw count.

countBufferOffset - the byte offset into countBuffer where the draw count begins.

maxDrawCount - specifies the maximum number of draws that will be executed. The actual number of executed draw calls is the minimum of the count specified in countBuffer and maxDrawCount.

stride - the byte stride between successive sets of draw parameters.