[1/2][Ozone-Drm] Refactor GPU display management

ui/ozone/platform/drm/gpu/drm_display_snapshot.cc

-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "ui/ozone/platform/drm/gpu/drm_display_snapshot.h"
-
-#include <stdint.h>
-#include <stdlib.h>
-#include <xf86drmMode.h>
-
-#include "base/format_macros.h"
-#include "base/logging.h"
-#include "base/strings/stringprintf.h"
-#include "ui/display/util/edid_parser.h"
-#include "ui/ozone/platform/drm/common/drm_util.h"
-#include "ui/ozone/platform/drm/gpu/drm_device.h"
-#include "ui/ozone/platform/drm/gpu/drm_display_mode.h"
-
-#if !defined(DRM_MODE_CONNECTOR_DSI)
-#define DRM_MODE_CONNECTOR_DSI 16
-#endif
-
-namespace ui {
-
-namespace {
-
-DisplayConnectionType GetDisplayType(drmModeConnector* connector) {
-  switch (connector->connector_type) {
-    case DRM_MODE_CONNECTOR_VGA:
-      return DISPLAY_CONNECTION_TYPE_VGA;
-    case DRM_MODE_CONNECTOR_DVII:
-    case DRM_MODE_CONNECTOR_DVID:
-    case DRM_MODE_CONNECTOR_DVIA:
-      return DISPLAY_CONNECTION_TYPE_DVI;
-    case DRM_MODE_CONNECTOR_LVDS:
-    case DRM_MODE_CONNECTOR_eDP:
-    case DRM_MODE_CONNECTOR_DSI:
-      return DISPLAY_CONNECTION_TYPE_INTERNAL;
-    case DRM_MODE_CONNECTOR_DisplayPort:
-      return DISPLAY_CONNECTION_TYPE_DISPLAYPORT;
-    case DRM_MODE_CONNECTOR_HDMIA:
-    case DRM_MODE_CONNECTOR_HDMIB:
-      return DISPLAY_CONNECTION_TYPE_HDMI;
-    default:
-      return DISPLAY_CONNECTION_TYPE_UNKNOWN;
-  }
-}
-
-bool IsAspectPreserving(DrmDevice* drm, drmModeConnector* connector) {
-  ScopedDrmPropertyPtr property(drm->GetProperty(connector, "scaling mode"));
-  if (!property)
-    return false;
-
-  for (int props_i = 0; props_i < connector->count_props; ++props_i) {
-    if (connector->props[props_i] != property->prop_id)
-      continue;
-
-    for (int enums_i = 0; enums_i < property->count_enums; ++enums_i) {
-      if (property->enums[enums_i].value == connector->prop_values[props_i] &&
-          strcmp(property->enums[enums_i].name, "Full aspect") == 0)
-        return true;
-    }
-  }
-
-  return false;
-}
-
-}  // namespace
-
-DrmDisplaySnapshot::DrmDisplaySnapshot(const scoped_refptr<DrmDevice>& drm,
-                                       drmModeConnector* connector,
-                                       drmModeCrtc* crtc,
-                                       uint32_t index)
-    : DisplaySnapshot(index,
-                      gfx::Point(crtc->x, crtc->y),
-                      gfx::Size(connector->mmWidth, connector->mmHeight),
-                      GetDisplayType(connector),
-                      IsAspectPreserving(drm.get(), connector),
-                      false,
-                      std::string(),
-                      std::vector<const DisplayMode*>(),
-                      nullptr,
-                      nullptr),
-      drm_(drm),
-      connector_(connector->connector_id),
-      crtc_(crtc->crtc_id) {
-  ScopedDrmPropertyBlobPtr edid_blob(drm->GetPropertyBlob(connector, "EDID"));
-
-  if (edid_blob) {
-    std::vector<uint8_t> edid(
-        static_cast<uint8_t*>(edid_blob->data),
-        static_cast<uint8_t*>(edid_blob->data) + edid_blob->length);
-
-    if (!GetDisplayIdFromEDID(edid, index, &display_id_))
-      display_id_ = index;
-
-    ParseOutputDeviceData(edid, nullptr, &display_name_, nullptr, nullptr);
-    ParseOutputOverscanFlag(edid, &overscan_flag_);
-  } else {
-    VLOG(1) << "Failed to get EDID blob for connector "
-            << connector->connector_id;
-  }
-
-  for (int i = 0; i < connector->count_modes; ++i) {
-    drmModeModeInfo& mode = connector->modes[i];
-    modes_.push_back(new DrmDisplayMode(mode));
-
-    if (crtc->mode_valid && SameMode(crtc->mode, mode))
-      current_mode_ = modes_.back();
-
-    if (mode.type & DRM_MODE_TYPE_PREFERRED)
-      native_mode_ = modes_.back();
-  }
-
-  // If no preferred mode is found then use the first one. Using the first one
-  // since it should be the best mode.
-  if (!native_mode_ && !modes_.empty())
-    native_mode_ = modes_.front();
-}
-
-DrmDisplaySnapshot::~DrmDisplaySnapshot() {
-}
-
-std::string DrmDisplaySnapshot::ToString() const {
-  return base::StringPrintf(
-      "[type=%d, connector=%" PRIu32 ", crtc=%" PRIu32
-      ", origin=%s, mode=%s, dim=%s]",
-      type_, connector_, crtc_, origin_.ToString().c_str(),
-      current_mode_ ? current_mode_->ToString().c_str() : "NULL",
-      physical_size_.ToString().c_str());
-}
-
-}  // namespace ui