display_info.cc revision a36e5920737c6adbddd3e43b760e5de8431db6e0 
1// Copyright (c) 2013 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 <stdio.h>
6#include <string>
7#include <vector>
8
9#include "ash/display/display_info.h"
10#include "base/logging.h"
11#include "base/strings/string_number_conversions.h"
12#include "base/strings/string_util.h"
13#include "base/strings/stringprintf.h"
14#include "ui/gfx/display.h"
15#include "ui/gfx/size_conversions.h"
16#include "ui/gfx/size_f.h"
17
18#if defined(OS_WIN)
19#include "ui/aura/root_window_host.h"
20#endif
21
22namespace ash {
23namespace internal {
24
25Resolution::Resolution(const gfx::Size& size, bool interlaced)
26    : size(size),
27      interlaced(interlaced) {
28}
29
30// satic
31DisplayInfo DisplayInfo::CreateFromSpec(const std::string& spec) {
32  return CreateFromSpecWithID(spec, gfx::Display::kInvalidDisplayID);
33}
34
35// static
36DisplayInfo DisplayInfo::CreateFromSpecWithID(const std::string& spec,
37                                              int64 id) {
38  // Default bounds for a display.
39  const int kDefaultHostWindowX = 200;
40  const int kDefaultHostWindowY = 200;
41  const int kDefaultHostWindowWidth = 1366;
42  const int kDefaultHostWindowHeight = 768;
43
44  // Use larger than max int to catch overflow early.
45  static int64 synthesized_display_id = 2200000000LL;
46
47#if defined(OS_WIN)
48  gfx::Rect bounds_in_pixel(aura::RootWindowHost::GetNativeScreenSize());
49#else
50  gfx::Rect bounds_in_pixel(kDefaultHostWindowX, kDefaultHostWindowY,
51                            kDefaultHostWindowWidth, kDefaultHostWindowHeight);
52#endif
53  std::string main_spec = spec;
54
55  float ui_scale = 1.0f;
56  std::vector<std::string> parts;
57  if (Tokenize(main_spec, "@", &parts) == 2) {
58    double scale_in_double = 0;
59    if (base::StringToDouble(parts[1], &scale_in_double))
60      ui_scale = scale_in_double;
61    main_spec = parts[0];
62  }
63
64  size_t count = Tokenize(main_spec, "/", &parts);
65  gfx::Display::Rotation rotation(gfx::Display::ROTATE_0);
66  bool has_overscan = false;
67  if (count) {
68    main_spec = parts[0];
69    if (count >= 2) {
70      std::string options = parts[1];
71      for (size_t i = 0; i < options.size(); ++i) {
72        char c = options[i];
73        switch (c) {
74          case 'o':
75            has_overscan = true;
76            break;
77          case 'r':  // rotate 90 degrees to 'right'.
78            rotation = gfx::Display::ROTATE_90;
79            break;
80          case 'u':  // 180 degrees, 'u'pside-down.
81            rotation = gfx::Display::ROTATE_180;
82            break;
83          case 'l':  // rotate 90 degrees to 'left'.
84            rotation = gfx::Display::ROTATE_270;
85            break;
86        }
87      }
88    }
89  }
90
91  int x = 0, y = 0, width, height;
92  float device_scale_factor = 1.0f;
93  if (sscanf(main_spec.c_str(), "%dx%d*%f",
94             &width, &height, &device_scale_factor) >= 2 ||
95      sscanf(main_spec.c_str(), "%d+%d-%dx%d*%f", &x, &y, &width, &height,
96             &device_scale_factor) >= 4) {
97    bounds_in_pixel.SetRect(x, y, width, height);
98  }
99  if (id == gfx::Display::kInvalidDisplayID)
100    id = synthesized_display_id++;
101  DisplayInfo display_info(
102      id, base::StringPrintf("Display-%d", static_cast<int>(id)), has_overscan);
103  display_info.set_device_scale_factor(device_scale_factor);
104  display_info.set_rotation(rotation);
105  display_info.set_ui_scale(ui_scale);
106  display_info.SetBounds(bounds_in_pixel);
107
108  // To test the overscan, it creates the default 5% overscan.
109  if (has_overscan) {
110    int width = bounds_in_pixel.width() / device_scale_factor / 40;
111    int height = bounds_in_pixel.height() / device_scale_factor / 40;
112    display_info.SetOverscanInsets(gfx::Insets(height, width, height, width));
113    display_info.UpdateDisplaySize();
114  }
115
116  DVLOG(1) << "DisplayInfoFromSpec info=" << display_info.ToString()
117           << ", spec=" << spec;
118  return display_info;
119}
120
121DisplayInfo::DisplayInfo()
122    : id_(gfx::Display::kInvalidDisplayID),
123      has_overscan_(false),
124      rotation_(gfx::Display::ROTATE_0),
125      device_scale_factor_(1.0f),
126      overscan_insets_in_dip_(0, 0, 0, 0),
127      ui_scale_(1.0f),
128      native_(false) {
129}
130
131DisplayInfo::DisplayInfo(int64 id,
132                         const std::string& name,
133                         bool has_overscan)
134    : id_(id),
135      name_(name),
136      has_overscan_(has_overscan),
137      rotation_(gfx::Display::ROTATE_0),
138      device_scale_factor_(1.0f),
139      overscan_insets_in_dip_(0, 0, 0, 0),
140      ui_scale_(1.0f),
141      native_(false) {
142}
143
144DisplayInfo::~DisplayInfo() {
145}
146
147void DisplayInfo::Copy(const DisplayInfo& native_info) {
148  DCHECK(id_ == native_info.id_);
149  name_ = native_info.name_;
150  has_overscan_ = native_info.has_overscan_;
151
152  DCHECK(!native_info.bounds_in_pixel_.IsEmpty());
153  bounds_in_pixel_ = native_info.bounds_in_pixel_;
154  size_in_pixel_ = native_info.size_in_pixel_;
155  device_scale_factor_ = native_info.device_scale_factor_;
156  resolutions_ = native_info.resolutions_;
157
158  // Copy overscan_insets_in_dip_ if it's not empty. This is for test
159  // cases which use "/o" annotation which sets the overscan inset
160  // to native, and that overscan has to be propagated. This does not
161  // happen on the real environment.
162  if (!native_info.overscan_insets_in_dip_.empty())
163    overscan_insets_in_dip_ = native_info.overscan_insets_in_dip_;
164
165  // Rotation_ and ui_scale_ are given by preference, or unit
166  // tests. Don't copy if this native_info came from
167  // DisplayChangeObserverX11.
168  if (!native_info.native()) {
169    rotation_ = native_info.rotation_;
170    ui_scale_ = native_info.ui_scale_;
171  }
172  // Don't copy insets as it may be given by preference.  |rotation_|
173  // is treated as a native so that it can be specified in
174  // |CreateFromSpec|.
175}
176
177void DisplayInfo::SetBounds(const gfx::Rect& new_bounds_in_pixel) {
178  bounds_in_pixel_ = new_bounds_in_pixel;
179  size_in_pixel_ = new_bounds_in_pixel.size();
180  UpdateDisplaySize();
181}
182
183void DisplayInfo::UpdateDisplaySize() {
184  size_in_pixel_ = bounds_in_pixel_.size();
185  if (!overscan_insets_in_dip_.empty()) {
186    gfx::Insets insets_in_pixel =
187        overscan_insets_in_dip_.Scale(device_scale_factor_);
188    size_in_pixel_.Enlarge(-insets_in_pixel.width(), -insets_in_pixel.height());
189  } else {
190    overscan_insets_in_dip_.Set(0, 0, 0, 0);
191  }
192
193  if (rotation_ == gfx::Display::ROTATE_90 ||
194      rotation_ == gfx::Display::ROTATE_270)
195    size_in_pixel_.SetSize(size_in_pixel_.height(), size_in_pixel_.width());
196  gfx::SizeF size_f(size_in_pixel_);
197  size_f.Scale(ui_scale_);
198  size_in_pixel_ = gfx::ToFlooredSize(size_f);
199}
200
201void DisplayInfo::SetOverscanInsets(const gfx::Insets& insets_in_dip) {
202  overscan_insets_in_dip_ = insets_in_dip;
203}
204
205gfx::Insets DisplayInfo::GetOverscanInsetsInPixel() const {
206  return overscan_insets_in_dip_.Scale(device_scale_factor_);
207}
208
209std::string DisplayInfo::ToString() const {
210  int rotation_degree = static_cast<int>(rotation_) * 90;
211  return base::StringPrintf(
212      "DisplayInfo[%lld] native bounds=%s, size=%s, scale=%f, "
213      "overscan=%s, rotation=%d, ui-scale=%f",
214      static_cast<long long int>(id_),
215      bounds_in_pixel_.ToString().c_str(),
216      size_in_pixel_.ToString().c_str(),
217      device_scale_factor_,
218      overscan_insets_in_dip_.ToString().c_str(),
219      rotation_degree,
220      ui_scale_);
221}
222
223std::string DisplayInfo::ToFullString() const {
224  std::string resolutions_str;
225  std::vector<Resolution>::const_iterator iter = resolutions_.begin();
226  for (; iter != resolutions_.end(); ++iter) {
227    if (!resolutions_str.empty())
228      resolutions_str += ",";
229    resolutions_str += iter->size.ToString();
230    if (iter->interlaced)
231      resolutions_str += "(i)";
232  }
233  return ToString() + ", resolutions=" + resolutions_str;
234}
235
236}  // namespace internal
237}  // namespace ash
238