5d132ac0c6
`GLBatch::draw_indirect` has additional overhead compared to `GLBatch::draw`, and can become a bottleneck in scenes that require many draw calls (ie. with too many unique meshes). The performance difference is almost exclusively caused by the `GL_COMMAND_BARRIER_BIT` barrier that happens on every call. This PR adds a `GPU_storagebuf_sync_as_indirect_buffer` function that can be used to place the barrier only once after filling the indirect buffer content. This function is a no-op in Vulkan and Metal since they don't need the barrier. Pull Request: https://projects.blender.org/blender/blender/pulls/117561
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