hip/graphics_interop.cpp

Go to the documentation of this file.

/* SPDX-FileCopyrightText: 2011-2022 Blender Foundation
 *
 * SPDX-License-Identifier: Apache-2.0 */
 
#ifdef WITH_HIP
 
#  include "device/hip/graphics_interop.h"
 
#  include "device/hip/device_impl.h"
#  include "device/hip/util.h"
 
CCL_NAMESPACE_BEGIN
 
HIPDeviceGraphicsInterop::HIPDeviceGraphicsInterop(HIPDeviceQueue *queue)
    : queue_(queue), device_(static_cast<HIPDevice *>(queue->device))
{
}
 
HIPDeviceGraphicsInterop::~HIPDeviceGraphicsInterop()
{
  HIPContextScope scope(device_);
 
  if (hip_graphics_resource_) {
    hip_device_assert(device_, hipGraphicsUnregisterResource(hip_graphics_resource_));
  }
}
 
void HIPDeviceGraphicsInterop::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;
  }
 
  HIPContextScope scope(device_);
 
  if (hip_graphics_resource_) {
    hip_device_assert(device_, hipGraphicsUnregisterResource(hip_graphics_resource_));
  }
 
  const hipError_t result = hipGraphicsGLRegisterBuffer(
      &hip_graphics_resource_, display_interop.opengl_pbo_id, hipGraphicsRegisterFlagsNone);
  if (result != hipSuccess) {
    LOG(ERROR) << "Error registering OpenGL buffer: " << hipewErrorString(result);
  }
 
  opengl_pbo_id_ = display_interop.opengl_pbo_id;
  buffer_area_ = new_buffer_area;
}
 
device_ptr HIPDeviceGraphicsInterop::map()
{
  if (!hip_graphics_resource_) {
    return 0;
  }
 
  HIPContextScope scope(device_);
 
  hipDeviceptr_t hip_buffer;
  size_t bytes;
 
  hip_device_assert(device_,
                    hipGraphicsMapResources(1, &hip_graphics_resource_, queue_->stream()));
  hip_device_assert(
      device_, hipGraphicsResourceGetMappedPointer(&hip_buffer, &bytes, hip_graphics_resource_));
 
  if (need_clear_) {
    hip_device_assert(
        device_,
        hipMemsetD8Async(static_cast<hipDeviceptr_t>(hip_buffer), 0, bytes, queue_->stream()));
 
    need_clear_ = false;
  }
 
  return static_cast<device_ptr>(hip_buffer);
}
 
void HIPDeviceGraphicsInterop::unmap()
{
  HIPContextScope scope(device_);
 
  hip_device_assert(device_,
                    hipGraphicsUnmapResources(1, &hip_graphics_resource_, queue_->stream()));
}
 
CCL_NAMESPACE_END
 
#endif