| // Copyright (c) 2019-2020 NVIDIA Corporation |
| // |
| // SPDX-License-Identifier: CC-BY-4.0 |
| |
| [[device-generated-commands]] |
| = Device-Generated Commands |
| |
| This chapter discusses the generation of command buffer content on the |
| device, for which these principle steps are to be taken: |
| |
| * Define via sname:VkIndirectCommandsLayoutNV the sequence of commands |
| which should be generated. |
| * Optionally make use of <<graphics-shadergroups, device-bindable Shader |
| Groups>>. |
| * Retrieve device addresses by flink:vkGetBufferDeviceAddressEXT for |
| setting buffers on the device. |
| * Fill one or more sname:VkBuffer with the appropriate content that gets |
| interpreted by sname:VkIndirectCommandsLayoutNV. |
| * Create a `preprocess` sname:VkBuffer using the allocation information |
| from flink:vkGetGeneratedCommandsMemoryRequirementsNV. |
| * Optionally preprocess the input data using |
| flink:vkCmdPreprocessGeneratedCommandsNV in a separate action. |
| * Generate and execute the actual commands via |
| flink:vkCmdExecuteGeneratedCommandsNV passing all required data. |
| |
| flink:vkCmdPreprocessGeneratedCommandsNV executes in a separate logical |
| pipeline from either graphics or compute. |
| When preprocessing commands in a separate step they must: be explicitly |
| synchronized against the command execution. |
| When not preprocessing, the preprocessing is automatically synchronized |
| against the command execution. |
| |
| include::indirectcommands.txt[] |
| |
| include::generation.txt[] |
