a754e35198
* Split GPUDisplay into two classes. PathTraceDisplay to implement the Cycles side, and DisplayDriver to implement the host application side. The DisplayDriver is now a fully abstract base class, embedded in the PathTraceDisplay. * Move copy_pixels_to_texture implementation out of the host side into the Cycles side, since it can be implemented in terms of the texture buffer mapping. * Move definition of DeviceGraphicsInteropDestination into display driver header, so that we do not need to expose private device headers in the public API. * Add more detailed comments about how the DisplayDriver should be implemented. The "driver" terminology might not be obvious, but is also used in other renderers. Differential Revision: https://developer.blender.org/D12626
104 lines
2.8 KiB
C++
104 lines
2.8 KiB
C++
/*
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* Copyright 2011-2021 Blender Foundation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifdef WITH_CUDA
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# include "device/cuda/graphics_interop.h"
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# include "device/cuda/device_impl.h"
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# include "device/cuda/util.h"
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CCL_NAMESPACE_BEGIN
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CUDADeviceGraphicsInterop::CUDADeviceGraphicsInterop(CUDADeviceQueue *queue)
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: queue_(queue), device_(static_cast<CUDADevice *>(queue->device))
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{
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}
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CUDADeviceGraphicsInterop::~CUDADeviceGraphicsInterop()
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{
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CUDAContextScope scope(device_);
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if (cu_graphics_resource_) {
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cuda_device_assert(device_, cuGraphicsUnregisterResource(cu_graphics_resource_));
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}
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}
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void CUDADeviceGraphicsInterop::set_display_interop(
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const DisplayDriver::GraphicsInterop &display_interop)
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{
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const int64_t new_buffer_area = int64_t(display_interop.buffer_width) *
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display_interop.buffer_height;
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need_clear_ = display_interop.need_clear;
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if (opengl_pbo_id_ == display_interop.opengl_pbo_id && buffer_area_ == new_buffer_area) {
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return;
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}
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CUDAContextScope scope(device_);
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if (cu_graphics_resource_) {
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cuda_device_assert(device_, cuGraphicsUnregisterResource(cu_graphics_resource_));
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}
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const CUresult result = cuGraphicsGLRegisterBuffer(
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&cu_graphics_resource_, display_interop.opengl_pbo_id, CU_GRAPHICS_MAP_RESOURCE_FLAGS_NONE);
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if (result != CUDA_SUCCESS) {
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LOG(ERROR) << "Error registering OpenGL buffer: " << cuewErrorString(result);
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}
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opengl_pbo_id_ = display_interop.opengl_pbo_id;
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buffer_area_ = new_buffer_area;
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}
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device_ptr CUDADeviceGraphicsInterop::map()
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{
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if (!cu_graphics_resource_) {
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return 0;
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}
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CUDAContextScope scope(device_);
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CUdeviceptr cu_buffer;
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size_t bytes;
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cuda_device_assert(device_, cuGraphicsMapResources(1, &cu_graphics_resource_, queue_->stream()));
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cuda_device_assert(
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device_, cuGraphicsResourceGetMappedPointer(&cu_buffer, &bytes, cu_graphics_resource_));
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if (need_clear_) {
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cuda_device_assert(
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device_, cuMemsetD8Async(static_cast<CUdeviceptr>(cu_buffer), 0, bytes, queue_->stream()));
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need_clear_ = false;
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}
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return static_cast<device_ptr>(cu_buffer);
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}
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void CUDADeviceGraphicsInterop::unmap()
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{
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CUDAContextScope scope(device_);
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cuda_device_assert(device_,
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cuGraphicsUnmapResources(1, &cu_graphics_resource_, queue_->stream()));
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}
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CCL_NAMESPACE_END
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#endif
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