1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
|
// Copyright 2022 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "gpu/command_buffer/service/shared_image/dawn_ahardwarebuffer_image_representation.h"
#include <dawn/native/VulkanBackend.h>
#include "base/logging.h"
#include "gpu/config/gpu_finch_features.h"
#include "third_party/abseil-cpp/absl/cleanup/cleanup.h"
namespace gpu {
DawnAHardwareBufferImageRepresentation::DawnAHardwareBufferImageRepresentation(
SharedImageManager* manager,
AndroidImageBacking* backing,
MemoryTypeTracker* tracker,
wgpu::Device device,
wgpu::BackendType backend_type,
wgpu::TextureFormat format,
std::vector<wgpu::TextureFormat> view_formats,
AHardwareBuffer* buffer)
: DawnImageRepresentation(manager, backing, tracker),
device_(std::move(device)),
backend_type_(backend_type),
format_(format),
view_formats_(std::move(view_formats)) {
DCHECK(device_);
handle_ = base::android::ScopedHardwareBufferHandle::Create(buffer);
}
DawnAHardwareBufferImageRepresentation::
~DawnAHardwareBufferImageRepresentation() {
EndAccess();
}
wgpu::Texture DawnAHardwareBufferImageRepresentation::BeginAccess(
wgpu::TextureUsage usage,
wgpu::TextureUsage internal_usage) {
wgpu::TextureDescriptor texture_descriptor;
texture_descriptor.format = format_;
texture_descriptor.usage = static_cast<wgpu::TextureUsage>(usage);
texture_descriptor.dimension = wgpu::TextureDimension::e2D;
texture_descriptor.size = {static_cast<uint32_t>(size().width()),
static_cast<uint32_t>(size().height()), 1};
texture_descriptor.mipLevelCount = 1;
texture_descriptor.sampleCount = 1;
texture_descriptor.viewFormatCount = view_formats_.size();
texture_descriptor.viewFormats = view_formats_.data();
AccessMode access_mode;
wgpu::DawnTextureInternalUsageDescriptor internalDesc;
internalDesc.internalUsage = internal_usage;
access_mode = usage & kWriteUsage || internal_usage & kWriteUsage
? AccessMode::kWrite
: AccessMode::kRead;
if (access_mode == AccessMode::kRead && !IsCleared()) {
// Read-only access of an uncleared texture is not allowed: clients
// relying on Dawn's lazy clearing of uninitialized textures must make
// this reliance explicit by passing a write usage.
return nullptr;
}
texture_descriptor.nextInChain = &internalDesc;
base::ScopedFD sync_fd;
if (access_mode == AccessMode::kWrite) {
if (!android_backing()->BeginWrite(&sync_fd)) {
return nullptr;
}
} else {
if (!android_backing()->BeginRead(this, &sync_fd)) {
return nullptr;
}
}
wgpu::SharedTextureMemoryBeginAccessDescriptor begin_access_desc = {};
begin_access_desc.initialized = IsCleared();
wgpu::SharedTextureMemoryVkImageLayoutBeginState begin_layout{};
// TODO(crbug.com/327111284): Track layouts correctly.
begin_layout.oldLayout = VK_IMAGE_LAYOUT_UNDEFINED;
begin_layout.newLayout = VK_IMAGE_LAYOUT_UNDEFINED;
if (backend_type_ == wgpu::BackendType::Vulkan) {
begin_access_desc.nextInChain = &begin_layout;
}
wgpu::SharedFence shared_fence;
// Pass 1 as the signaled value for the binary semaphore
// (Dawn's SharedTextureMemoryVk verifies that this is the value passed).
const uint64_t signaled_value = 1;
// If the semaphore from BeginWrite is valid then pass it to
// SharedTextureMemory::BeginAccess() below.
if (sync_fd.is_valid()) {
wgpu::SharedFenceSyncFDDescriptor sync_fd_desc;
// NOTE: There is no ownership transfer here, as Dawn internally dup()s the
// passed-in handle.
sync_fd_desc.handle = sync_fd.get();
wgpu::SharedFenceDescriptor fence_desc;
fence_desc.nextInChain = &sync_fd_desc;
shared_fence = device_.ImportSharedFence(&fence_desc);
begin_access_desc.fenceCount = 1;
begin_access_desc.fences = &shared_fence;
begin_access_desc.signaledValues = &signaled_value;
}
if (!shared_texture_memory_) {
wgpu::SharedTextureMemoryDescriptor desc = {};
wgpu::SharedTextureMemoryAHardwareBufferDescriptor
stm_ahardwarebuffer_desc = {};
stm_ahardwarebuffer_desc.handle = handle_.get();
desc.nextInChain = &stm_ahardwarebuffer_desc;
shared_texture_memory_ = device_.ImportSharedTextureMemory(&desc);
}
texture_ = shared_texture_memory_.CreateTexture(&texture_descriptor);
if (shared_texture_memory_.BeginAccess(texture_, &begin_access_desc) !=
wgpu::Status::Success) {
LOG(ERROR) << "Failed to begin access for texture";
// End the access on the backing and restore its fence, as Dawn did not
// consume it.
if (access_mode == AccessMode::kWrite) {
android_backing()->EndWrite(std::move(sync_fd));
} else {
android_backing()->EndRead(this, std::move(sync_fd));
}
// Set `texture_` to nullptr to signal failure to BeginScopedAccess(), which
// will itself then return nullptr to signal failure to the client.
texture_ = nullptr;
}
access_mode_ = access_mode;
return texture_;
}
void DawnAHardwareBufferImageRepresentation::EndAccess() {
if (access_mode_ == AccessMode::kNone) {
return;
}
base::ScopedFD end_access_sync_fd;
// This will perform cleanup when the function exits for failure or success.
absl::Cleanup on_exit = [this, &end_access_sync_fd]() {
if (access_mode_ == AccessMode::kWrite) {
android_backing()->EndWrite(std::move(end_access_sync_fd));
} else {
android_backing()->EndRead(this, std::move(end_access_sync_fd));
}
texture_.Destroy();
texture_ = nullptr;
access_mode_ = AccessMode::kNone;
};
wgpu::SharedTextureMemoryEndAccessState end_access_desc = {};
wgpu::SharedTextureMemoryVkImageLayoutEndState end_layout{};
if (backend_type_ == wgpu::BackendType::Vulkan) {
end_access_desc.nextInChain = &end_layout;
}
if (shared_texture_memory_.EndAccess(texture_, &end_access_desc) !=
wgpu::Status::Success) {
LOG(ERROR) << "Failed to end access for texture";
return;
}
if (end_access_desc.initialized) {
SetCleared();
}
wgpu::SharedFenceExportInfo export_info;
wgpu::SharedFenceSyncFDExportInfo sync_fd_export_info;
export_info.nextInChain = &sync_fd_export_info;
// Note: Dawn may export zero fences if there were no begin fences,
// AND the WGPUTexture was not used on the GPU queue within the
// access scope. Otherwise, it should either export fences from Dawn
// signaled after the WGPUTexture's last use, or it should re-export
// the begin fences if the WGPUTexture was unused.
if (end_access_desc.fenceCount) {
DCHECK_EQ(end_access_desc.fenceCount, 1u);
end_access_desc.fences[0].ExportInfo(&export_info);
// Dawn will close its FD when `end_access_desc` falls out of scope, and
// so it is necessary to dup() it to give AndroidImageBacking an FD that
// it can own.
end_access_sync_fd = base::ScopedFD(dup(sync_fd_export_info.handle));
}
}
} // namespace gpu
|
