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render/vulkan: add a command buffer pool

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Before re-using a VkCommandBuffer, we need to wait for its
operations to complete. Right now we unconditionally wait for
rendering to complete in vulkan_end(), however we have plans to
fix this [1]. To fully avoid blocking, we need to handle multiple
command buffers in flight at the same time (e.g. for multi-output,
or for rendering followed by texture uploads).

Implement a pool of command buffers. When we need to render, we
pick a command buffer from the pool which has completed its
operations. If we don't find one, try to allocate a new command
buffer. If we don't have slots in the pool anymore, block like we
did before.

[1]: https://gitlab.freedesktop.org/wlroots/wlroots/-/merge_requests/3574
This commit is contained in:
Simon Ser 2022-11-04 16:54:49 +01:00
parent a8a194d695
commit f1eae0eeeb
3 changed files with 165 additions and 39 deletions
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2
render/vulkan/vulkan.c
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@ -489,6 +489,8 @@ struct wlr_vk_device *vulkan_device_create(struct wlr_vk_instance *ini,
load_device_proc(dev, "vkGetMemoryFdPropertiesKHR",
&dev->api.getMemoryFdPropertiesKHR);
load_device_proc(dev, "vkWaitSemaphoresKHR", &dev->api.waitSemaphoresKHR);
load_device_proc(dev, "vkGetSemaphoreCounterValueKHR",
&dev->api.getSemaphoreCounterValueKHR);
// - check device format support -
size_t max_fmts;