diff options
Diffstat (limited to 'intern/cycles/device/cuda/graphics_interop.cpp')
-rw-r--r-- | intern/cycles/device/cuda/graphics_interop.cpp | 102 |
1 files changed, 102 insertions, 0 deletions
diff --git a/intern/cycles/device/cuda/graphics_interop.cpp b/intern/cycles/device/cuda/graphics_interop.cpp new file mode 100644 index 00000000000..e8ca8b90eae --- /dev/null +++ b/intern/cycles/device/cuda/graphics_interop.cpp @@ -0,0 +1,102 @@ +/* + * 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 |