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
|
/*
* Copyright 2011-2021 Blender Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifdef WITH_CUDA
# include "device/cuda/graphics_interop.h"
# include "device/cuda/device_impl.h"
# include "device/cuda/util.h"
CCL_NAMESPACE_BEGIN
CUDADeviceGraphicsInterop::CUDADeviceGraphicsInterop(CUDADeviceQueue *queue)
: queue_(queue), device_(static_cast<CUDADevice *>(queue->device))
{
}
CUDADeviceGraphicsInterop::~CUDADeviceGraphicsInterop()
{
CUDAContextScope scope(device_);
if (cu_graphics_resource_) {
cuda_device_assert(device_, cuGraphicsUnregisterResource(cu_graphics_resource_));
}
}
void CUDADeviceGraphicsInterop::set_destination(
const DeviceGraphicsInteropDestination &destination)
{
const int64_t new_buffer_area = int64_t(destination.buffer_width) * destination.buffer_height;
need_clear_ = destination.need_clear;
if (opengl_pbo_id_ == destination.opengl_pbo_id && buffer_area_ == new_buffer_area) {
return;
}
CUDAContextScope scope(device_);
if (cu_graphics_resource_) {
cuda_device_assert(device_, cuGraphicsUnregisterResource(cu_graphics_resource_));
}
const CUresult result = cuGraphicsGLRegisterBuffer(
&cu_graphics_resource_, destination.opengl_pbo_id, CU_GRAPHICS_MAP_RESOURCE_FLAGS_NONE);
if (result != CUDA_SUCCESS) {
LOG(ERROR) << "Error registering OpenGL buffer: " << cuewErrorString(result);
}
opengl_pbo_id_ = destination.opengl_pbo_id;
buffer_area_ = new_buffer_area;
}
device_ptr CUDADeviceGraphicsInterop::map()
{
if (!cu_graphics_resource_) {
return 0;
}
CUDAContextScope scope(device_);
CUdeviceptr cu_buffer;
size_t bytes;
cuda_device_assert(device_, cuGraphicsMapResources(1, &cu_graphics_resource_, queue_->stream()));
cuda_device_assert(
device_, cuGraphicsResourceGetMappedPointer(&cu_buffer, &bytes, cu_graphics_resource_));
if (need_clear_) {
cuda_device_assert(
device_, cuMemsetD8Async(static_cast<CUdeviceptr>(cu_buffer), 0, bytes, queue_->stream()));
need_clear_ = false;
}
return static_cast<device_ptr>(cu_buffer);
}
void CUDADeviceGraphicsInterop::unmap()
{
CUDAContextScope scope(device_);
cuda_device_assert(device_,
cuGraphicsUnmapResources(1, &cu_graphics_resource_, queue_->stream()));
}
CCL_NAMESPACE_END
#endif
|
