C Specification
To record a non-indexed draw call with a draw call count sourced from a buffer, call:
void vkCmdDrawIndirectCountKHR(
VkCommandBuffer commandBuffer,
VkBuffer buffer,
VkDeviceSize offset,
VkBuffer countBuffer,
VkDeviceSize countBufferOffset,
uint32_t maxDrawCount,
uint32_t stride);
or the equivalent command
void vkCmdDrawIndirectCountAMD(
VkCommandBuffer commandBuffer,
VkBuffer buffer,
VkDeviceSize offset,
VkBuffer countBuffer,
VkDeviceSize countBufferOffset,
uint32_t maxDrawCount,
uint32_t stride);
Parameters
-
commandBuffer
is the command buffer into which the command is recorded. -
buffer
is the buffer containing draw parameters. -
offset
is the byte offset intobuffer
where parameters begin. -
countBuffer
is the buffer containing the draw count. -
countBufferOffset
is the byte offset intocountBuffer
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 incountBuffer
andmaxDrawCount
. -
stride
is the byte stride between successive sets of draw parameters.
Description
vkCmdDrawIndirectCountKHR
behaves similarly to vkCmdDrawIndirect
except that the draw count is read by the device from a buffer during
execution.
The command will read an unsigned 32-bit integer from countBuffer
located at countBufferOffset
and use this as the draw count.
See Also
VkBuffer, VkCommandBuffer, VkDeviceSize
Document Notes
For more information, see the Vulkan Specification
This page is extracted from the Vulkan Specification. Fixes and changes should be made to the Specification, not directly.
Copyright
Copyright (c) 2014-2019 Khronos Group. This work is licensed under a Creative Commons Attribution 4.0 International License.