VkIndirectCommandsLayoutCreateInfoNV

The VkIndirectCommandsLayoutCreateInfoNV structure is defined as:

typedef struct VkIndirectCommandsLayoutCreateInfoNV {
    VkStructureType sType;
    const void* pNext;
    VkIndirectCommandsLayoutUsageFlagsNV flags;
    VkPipelineBindPoint pipelineBindPoint;
    uint32_t tokenCount;
    const VkIndirectCommandsLayoutTokenNV* pTokens;
    uint32_t streamCount;
    const uint32_t* pStreamStrides;
} VkIndirectCommandsLayoutCreateInfoNV;

• sType is a VkStructureType value identifying this structure.
• pNext is NULL or a pointer to a structure extending this structure.
• pipelineBindPoint is the VkPipelineBindPoint that this layout targets.
• flags is a bitmask of VkIndirectCommandsLayoutUsageFlagBitsNV specifying usage hints of this layout.
• tokenCount is the length of the individual command sequence.
• pTokens is an array describing each command token in detail. See VkIndirectCommandsTokenTypeNV and VkIndirectCommandsLayoutTokenNV below for details.
• streamCount is the number of streams used to provide the token inputs.
• pStreamStrides is an array defining the byte stride for each input stream.

The following code illustrates some of the flags:

void cmdProcessAllSequences(cmd, pipeline, indirectCommandsLayout, pIndirectCommandsTokens, sequencesCount, indexbuffer, indexbufferOffset)
{
  for (s = 0; s < sequencesCount; s++)
  {
    sUsed = s;

    if (indirectCommandsLayout.flags & VK_INDIRECT_COMMANDS_LAYOUT_USAGE_INDEXED_SEQUENCES_BIT_NV) {
      sUsed = indexbuffer.load_uint32( sUsed * sizeof(uint32_t) + indexbufferOffset);
    }

    if (indirectCommandsLayout.flags & VK_INDIRECT_COMMANDS_LAYOUT_USAGE_UNORDERED_SEQUENCES_BIT_NV) {
      sUsed = incoherent_implementation_dependent_permutation[ sUsed ];
    }

    cmdProcessSequence( cmd, pipeline, indirectCommandsLayout, pIndirectCommandsTokens, sUsed );
  }
}

When tokens are consumed, an offset is computed based on token offset and stream stride. The resulting offset is required to be aligned. The alignment for a specific token is equal to the scalar alignment of the data type as defined in Alignment Requirements, or VkPhysicalDeviceDeviceGeneratedCommandsPropertiesNV::minIndirectCommandsBufferOffsetAlignment, whichever is lower.