display_info.cc revision f2477e01787aa58f445919b809d89e252beef54f 
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/window_tree_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_native(aura::RootWindowHost::GetNativeScreenSize());
49#else
50  gfx::Rect bounds_in_native(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_native.SetRect(x, y, width, height);
98  }
99
100  std::vector<Resolution> resolutions;
101  if (Tokenize(main_spec, "#", &parts) == 2) {
102    main_spec = parts[0];
103    std::string resolution_list = parts[1];
104    count = Tokenize(resolution_list, "|", &parts);
105    for (size_t i = 0; i < count; ++i) {
106      std::string resolution = parts[i];
107      int width, height;
108      if (sscanf(resolution.c_str(), "%dx%d", &width, &height) == 2)
109        resolutions.push_back(Resolution(gfx::Size(width, height), false));
110    }
111  }
112
113  if (id == gfx::Display::kInvalidDisplayID)
114    id = synthesized_display_id++;
115  DisplayInfo display_info(
116      id, base::StringPrintf("Display-%d", static_cast<int>(id)), has_overscan);
117  display_info.set_device_scale_factor(device_scale_factor);
118  display_info.set_rotation(rotation);
119  display_info.set_configured_ui_scale(ui_scale);
120  display_info.SetBounds(bounds_in_native);
121  display_info.set_resolutions(resolutions);
122
123  // To test the overscan, it creates the default 5% overscan.
124  if (has_overscan) {
125    int width = bounds_in_native.width() / device_scale_factor / 40;
126    int height = bounds_in_native.height() / device_scale_factor / 40;
127    display_info.SetOverscanInsets(gfx::Insets(height, width, height, width));
128    display_info.UpdateDisplaySize();
129  }
130
131  DVLOG(1) << "DisplayInfoFromSpec info=" << display_info.ToString()
132           << ", spec=" << spec;
133  return display_info;
134}
135
136DisplayInfo::DisplayInfo()
137    : id_(gfx::Display::kInvalidDisplayID),
138      has_overscan_(false),
139      rotation_(gfx::Display::ROTATE_0),
140      touch_support_(gfx::Display::TOUCH_SUPPORT_UNKNOWN),
141      device_scale_factor_(1.0f),
142      overscan_insets_in_dip_(0, 0, 0, 0),
143      configured_ui_scale_(1.0f),
144      native_(false) {
145}
146
147DisplayInfo::DisplayInfo(int64 id,
148                         const std::string& name,
149                         bool has_overscan)
150    : id_(id),
151      name_(name),
152      has_overscan_(has_overscan),
153      rotation_(gfx::Display::ROTATE_0),
154      touch_support_(gfx::Display::TOUCH_SUPPORT_UNKNOWN),
155      device_scale_factor_(1.0f),
156      overscan_insets_in_dip_(0, 0, 0, 0),
157      configured_ui_scale_(1.0f),
158      native_(false) {
159}
160
161DisplayInfo::~DisplayInfo() {
162}
163
164void DisplayInfo::Copy(const DisplayInfo& native_info) {
165  DCHECK(id_ == native_info.id_);
166  name_ = native_info.name_;
167  has_overscan_ = native_info.has_overscan_;
168
169  DCHECK(!native_info.bounds_in_native_.IsEmpty());
170  bounds_in_native_ = native_info.bounds_in_native_;
171  size_in_pixel_ = native_info.size_in_pixel_;
172  device_scale_factor_ = native_info.device_scale_factor_;
173  resolutions_ = native_info.resolutions_;
174  touch_support_ = native_info.touch_support_;
175
176  // Copy overscan_insets_in_dip_ if it's not empty. This is for test
177  // cases which use "/o" annotation which sets the overscan inset
178  // to native, and that overscan has to be propagated. This does not
179  // happen on the real environment.
180  if (!native_info.overscan_insets_in_dip_.empty())
181    overscan_insets_in_dip_ = native_info.overscan_insets_in_dip_;
182
183  // Rotation_ and ui_scale_ are given by preference, or unit
184  // tests. Don't copy if this native_info came from
185  // DisplayChangeObserver.
186  if (!native_info.native()) {
187    rotation_ = native_info.rotation_;
188    configured_ui_scale_ = native_info.configured_ui_scale_;
189  }
190  // Don't copy insets as it may be given by preference.  |rotation_|
191  // is treated as a native so that it can be specified in
192  // |CreateFromSpec|.
193}
194
195void DisplayInfo::SetBounds(const gfx::Rect& new_bounds_in_native) {
196  bounds_in_native_ = new_bounds_in_native;
197  size_in_pixel_ = new_bounds_in_native.size();
198  UpdateDisplaySize();
199}
200
201float DisplayInfo::GetEffectiveUIScale() const {
202  if (device_scale_factor_ == 2.0f && configured_ui_scale_ == 2.0f)
203    return 1.0f;
204  return configured_ui_scale_;
205}
206
207void DisplayInfo::UpdateDisplaySize() {
208  size_in_pixel_ = bounds_in_native_.size();
209  if (!overscan_insets_in_dip_.empty()) {
210    gfx::Insets insets_in_pixel =
211        overscan_insets_in_dip_.Scale(device_scale_factor_);
212    size_in_pixel_.Enlarge(-insets_in_pixel.width(), -insets_in_pixel.height());
213  } else {
214    overscan_insets_in_dip_.Set(0, 0, 0, 0);
215  }
216
217  if (rotation_ == gfx::Display::ROTATE_90 ||
218      rotation_ == gfx::Display::ROTATE_270)
219    size_in_pixel_.SetSize(size_in_pixel_.height(), size_in_pixel_.width());
220  gfx::SizeF size_f(size_in_pixel_);
221  size_f.Scale(GetEffectiveUIScale());
222  size_in_pixel_ = gfx::ToFlooredSize(size_f);
223}
224
225void DisplayInfo::SetOverscanInsets(const gfx::Insets& insets_in_dip) {
226  overscan_insets_in_dip_ = insets_in_dip;
227}
228
229gfx::Insets DisplayInfo::GetOverscanInsetsInPixel() const {
230  return overscan_insets_in_dip_.Scale(device_scale_factor_);
231}
232
233std::string DisplayInfo::ToString() const {
234  int rotation_degree = static_cast<int>(rotation_) * 90;
235  return base::StringPrintf(
236      "DisplayInfo[%lld] native bounds=%s, size=%s, scale=%f, "
237      "overscan=%s, rotation=%d, ui-scale=%f, touchscreen=%s",
238      static_cast<long long int>(id_),
239      bounds_in_native_.ToString().c_str(),
240      size_in_pixel_.ToString().c_str(),
241      device_scale_factor_,
242      overscan_insets_in_dip_.ToString().c_str(),
243      rotation_degree,
244      configured_ui_scale_,
245      touch_support_ == gfx::Display::TOUCH_SUPPORT_AVAILABLE ? "yes" :
246      touch_support_ == gfx::Display::TOUCH_SUPPORT_UNAVAILABLE ? "no" :
247      "unknown");
248}
249
250std::string DisplayInfo::ToFullString() const {
251  std::string resolutions_str;
252  std::vector<Resolution>::const_iterator iter = resolutions_.begin();
253  for (; iter != resolutions_.end(); ++iter) {
254    if (!resolutions_str.empty())
255      resolutions_str += ",";
256    resolutions_str += iter->size.ToString();
257    if (iter->interlaced)
258      resolutions_str += "(i)";
259  }
260  return ToString() + ", resolutions=" + resolutions_str;
261}
262
263}  // namespace internal
264}  // namespace ash
265