ui/ozone/platform/dri/drm_device_manager.cc

   1 // Copyright 2015 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "ui/ozone/platform/dri/drm_device_manager.h"
   6
   7 #include "ui/ozone/platform/dri/drm_device.h"
   8
   9 namespace ui {
  10
  11 DrmDeviceManager::DrmDeviceManager(
  12     const scoped_refptr<DrmDevice>& primary_device)
  13     : primary_device_(primary_device) {
  14 }
  15
  16 DrmDeviceManager::~DrmDeviceManager() {
  17   DCHECK(drm_device_map_.empty());
  18 }
  19
  20 void DrmDeviceManager::UpdateDrmDevice(gfx::AcceleratedWidget widget,
  21                                        const scoped_refptr<DrmDevice>& device) {
  22   base::AutoLock lock(lock_);
  23   drm_device_map_[widget] = device;
  24 }
  25
  26 void DrmDeviceManager::RemoveDrmDevice(gfx::AcceleratedWidget widget) {
  27   base::AutoLock lock(lock_);
  28   auto it = drm_device_map_.find(widget);
  29   if (it != drm_device_map_.end())
  30     drm_device_map_.erase(it);
  31 }
  32
  33 scoped_refptr<DrmDevice> DrmDeviceManager::GetDrmDevice(
  34     gfx::AcceleratedWidget widget) {
  35   base::AutoLock lock(lock_);
  36   if (widget == gfx::kNullAcceleratedWidget)
  37     return primary_device_;
  38
  39   auto it = drm_device_map_.find(widget);
  40   DCHECK(it != drm_device_map_.end())
  41       << "Attempting to get device for unknown widget " << widget;
  42   // If the widget isn't associated with a display (headless mode) we can
  43   // allocate buffers from any controller since they will never be scanned out.
  44   // Use the primary DRM device as a fallback when allocating these buffers.
  45   if (!it->second)
  46     return primary_device_;
  47
  48   return it->second;
  49 }
  50
  51 }  // namespace ui