def create_render_resources():
global drawing_pool, cmd_draw, image_ready, rendering_done, render_fences
# Render commands setup
drawing_pool = hvk.create_command_pool(
api, device,
hvk.command_pool_create_info(
queue_family_index=render_queue.family.index,
flags=vk.COMMAND_POOL_CREATE_RESET_COMMAND_BUFFER_BIT))
cmd_draw = hvk.allocate_command_buffers(
api, device,
hvk.command_buffer_allocate_info(
command_pool=drawing_pool,
command_buffer_count=len(swapchain_images)))
# Render commands synchronisation resources
info = hvk.semaphore_create_info()
image_ready = hvk.create_semaphore(api, device, info)
rendering_done = hvk.create_semaphore(api, device, info)
info = hvk.fence_create_info(flags=vk.FENCE_CREATE_SIGNALED_BIT)
render_fences = tuple(
hvk.create_fence(api, device, info)
for _ in range(len(swapchain_images)))
def _setup_compute_commands(self):
engine, api, device = self.ctx
compute_shaders = self.computes
pool_create_info = hvk.command_pool_create_info(
queue_family_index=0,
flags=vk.COMMAND_POOL_CREATE_RESET_COMMAND_BUFFER_BIT)
allocate_info = hvk.command_buffer_allocate_info(
command_pool=0,
command_buffer_count=0,
level=vk.COMMAND_BUFFER_LEVEL_PRIMARY)
# Count the number of compute command buffers that will be allocated per queue
queues = tuple(engine.queues.values())
command_buffers_per_queues = [0 for q in queues]
for index, queue in enumerate(queues):
count = sum(1 for c in compute_shaders if c.queue is queue)
command_buffers_per_queues[index] += count
# Allocate a single command pool for every queue with at least 1 command buffer
queue_pool_count = []
for index, count in enumerate(command_buffers_per_queues):
if count == 0:
continue
queue = queues[index]
pool_create_info.queue_family_index = queue.family.index
pool = hvk.create_command_pool(api, device, pool_create_info)
queue_pool_count.append((queue, pool, count))
# Allocate the commands buffers and link them with the compute process
command_index = 0
command_buffers = []
for queue, pool, count in queue_pool_count:
for c in compute_shaders:
if c.queue != queue:
continue
c.command_index = command_index
command_index += 1
allocate_info.command_pool = pool
allocate_info.command_buffer_count = count
buffers = hvk.allocate_command_buffers(api, device, allocate_info)
command_buffers.extend(buffers)
self.compute_pools = tuple((q, p) for q, p, _ in queue_pool_count)
self.compute_commands = command_buffers
def create_staging_command():
global staging_pool, staging_cmd, staging_fence
# Create staging resources for uploading
staging_pool = hvk.create_command_pool(
api, device,
hvk.command_pool_create_info(
queue_family_index=render_queue.family.index,
flags=vk.COMMAND_POOL_CREATE_TRANSIENT_BIT
| vk.COMMAND_POOL_CREATE_RESET_COMMAND_BUFFER_BIT))
staging_cmd = hvk.allocate_command_buffers(
api, device,
hvk.command_buffer_allocate_info(command_pool=staging_pool,
command_buffer_count=1))[0]
staging_fence = hvk.create_fence(api, device, hvk.fence_create_info())
def _setup_render_commands(self):
engine, api, device = self.ctx
render_queue = engine.render_queue
render_target = engine.render_target
command_pool = hvk.create_command_pool(
api, device,
hvk.command_pool_create_info(
queue_family_index=render_queue.family.index,
flags=vk.COMMAND_POOL_CREATE_RESET_COMMAND_BUFFER_BIT))
cmd_draw = hvk.allocate_command_buffers(
api, device,
hvk.command_buffer_allocate_info(
command_pool=command_pool,
command_buffer_count=render_target.framebuffer_count,
level=vk.COMMAND_BUFFER_LEVEL_PRIMARY))
self.command_pool = command_pool
self.render_commands = cmd_draw
def _setup_setup_commands(self):
api, device = self.api, self.device
render_queue = self.render_queue
command_pool = hvk.create_command_pool(api, device, hvk.command_pool_create_info(
queue_family_index = render_queue.family.index,
flags = vk.COMMAND_POOL_CREATE_RESET_COMMAND_BUFFER_BIT
))
cmds = hvk.allocate_command_buffers(api, device, hvk.command_buffer_allocate_info(
command_pool = command_pool,
command_buffer_count = 1
))
fence_info = hvk.fence_create_info()
fence = hvk.create_fence(api, device, fence_info)
self.command_pool = command_pool
self.setup_command_buffer = cmds[0]
self.setup_fence = fence