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/*
* 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_display_interop(
const DisplayDriver::GraphicsInterop &display_interop)
{
const int64_t new_buffer_area = int64_t(display_interop.buffer_width) *
display_interop.buffer_height;
need_clear_ = display_interop.need_clear;
if (opengl_pbo_id_ == display_interop.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_, display_interop.opengl_pbo_id, CU_GRAPHICS_MAP_RESOURCE_FLAGS_NONE);
if (result != CUDA_SUCCESS) {
LOG(ERROR) << "Error registering OpenGL buffer: " << cuewErrorString(result);
}
opengl_pbo_id_ = display_interop.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
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