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barrier_vk.h
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1 // Copyright 2013 The Flutter Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #pragma once
6
7 #include "flutter/fml/macros.h"
8 #include "impeller/renderer/backend/vulkan/vk.h"
9
10 namespace impeller {
11
12 //------------------------------------------------------------------------------
13 /// @brief Defines an operations and memory access barrier on a resource.
14 ///
15 /// For further reading, see
16 /// https://www.khronos.org/events/vulkan-how-to-use-synchronisation-validation-across-multiple-queues-and-command-buffers
17 /// and the Vulkan spec. The docs for the various member of this
18 /// class are based on verbiage in the spec.
19 ///
20 struct BarrierVK {
21 vk::CommandBuffer cmd_buffer = {};
22 vk::ImageLayout new_layout = vk::ImageLayout::eUndefined;
23
24 // The first synchronization scope defines what operations the barrier waits
25 // for to be done. In the Vulkan spec, this is usually referred to as the src
26 // scope.
27 vk::PipelineStageFlags src_stage = vk::PipelineStageFlagBits::eNone;
28
29 // The first access scope defines what memory operations are guaranteed to
30 // happen before the barrier. In the Vulkan spec, this is usually referred to
31 // as the src scope.
32 vk::AccessFlags src_access = vk::AccessFlagBits::eNone;
33
34 // The second synchronization scope defines what operations wait for the
35 // barrier to be done. In the Vulkan spec, this is usually referred to as the
36 // dst scope.
37 vk::PipelineStageFlags dst_stage = vk::PipelineStageFlagBits::eNone;
38
39 // The second access scope defines what memory operations are prevented from
40 // running till after the barrier. In the Vulkan spec, this is usually
41 // referred to as the dst scope.
42 vk::AccessFlags dst_access = vk::AccessFlagBits::eNone;
43 };
44
45 } // namespace impeller
impeller::BarrierVK::dst_access
vk::AccessFlags dst_access
Definition: barrier_vk.h:42
impeller::BarrierVK::new_layout
vk::ImageLayout new_layout
Definition: barrier_vk.h:22
impeller::BarrierVK::cmd_buffer
vk::CommandBuffer cmd_buffer
Definition: barrier_vk.h:21
vk.h
impeller::BarrierVK
Defines an operations and memory access barrier on a resource.
Definition: barrier_vk.h:20
impeller::BarrierVK::src_access
vk::AccessFlags src_access
Definition: barrier_vk.h:32
impeller::BarrierVK::dst_stage
vk::PipelineStageFlags dst_stage
Definition: barrier_vk.h:37
impeller
Definition: aiks_context.cc:10
impeller::BarrierVK::src_stage
vk::PipelineStageFlags src_stage
Definition: barrier_vk.h:27