display_info.cc revision 6e8cce623b6e4fe0c9e4af605d675dd9d0338c38 
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#include "ui/gfx/win/dpi.h"
21#endif
22
23namespace ash {
24namespace {
25
26// TODO(oshima): This feature is obsolete. Remove this after m38.
27bool allow_upgrade_to_high_dpi = false;
28
29// Check the content of |spec| and fill |bounds| and |device_scale_factor|.
30// Returns true when |bounds| is found.
31bool GetDisplayBounds(
32    const std::string& spec, gfx::Rect* bounds, float* device_scale_factor) {
33  int width = 0;
34  int height = 0;
35  int x = 0;
36  int y = 0;
37  if (sscanf(spec.c_str(), "%dx%d*%f",
38             &width, &height, device_scale_factor) >= 2 ||
39      sscanf(spec.c_str(), "%d+%d-%dx%d*%f", &x, &y, &width, &height,
40             device_scale_factor) >= 4) {
41    bounds->SetRect(x, y, width, height);
42    return true;
43  }
44  return false;
45}
46
47}
48
49DisplayMode::DisplayMode()
50    : refresh_rate(0.0f),
51      interlaced(false),
52      native(false),
53      ui_scale(1.0f),
54      device_scale_factor(1.0f) {}
55
56DisplayMode::DisplayMode(const gfx::Size& size,
57                         float refresh_rate,
58                         bool interlaced,
59                         bool native)
60    : size(size),
61      refresh_rate(refresh_rate),
62      interlaced(interlaced),
63      native(native),
64      ui_scale(1.0f),
65      device_scale_factor(1.0f) {}
66
67gfx::Size DisplayMode::GetSizeInDIP() const {
68  gfx::SizeF size_dip(size);
69  size_dip.Scale(ui_scale);
70  size_dip.Scale(1.0f / device_scale_factor);
71  return gfx::ToFlooredSize(size_dip);
72}
73
74bool DisplayMode::IsEquivalent(const DisplayMode& other) const {
75  const float kEpsilon = 0.0001f;
76  return size == other.size &&
77      std::abs(ui_scale - other.ui_scale) < kEpsilon &&
78      std::abs(device_scale_factor - other.device_scale_factor) < kEpsilon;
79}
80
81// satic
82DisplayInfo DisplayInfo::CreateFromSpec(const std::string& spec) {
83  return CreateFromSpecWithID(spec, gfx::Display::kInvalidDisplayID);
84}
85
86// static
87void DisplayInfo::SetAllowUpgradeToHighDPI(bool enable) {
88  allow_upgrade_to_high_dpi = enable;
89}
90
91// static
92DisplayInfo DisplayInfo::CreateFromSpecWithID(const std::string& spec,
93                                              int64 id) {
94  // Default bounds for a display.
95  const int kDefaultHostWindowX = 200;
96  const int kDefaultHostWindowY = 200;
97  const int kDefaultHostWindowWidth = 1366;
98  const int kDefaultHostWindowHeight = 768;
99
100  // Use larger than max int to catch overflow early.
101  static int64 synthesized_display_id = 2200000000LL;
102
103#if defined(OS_WIN)
104  gfx::Rect bounds_in_native(aura::WindowTreeHost::GetNativeScreenSize());
105#else
106  gfx::Rect bounds_in_native(kDefaultHostWindowX, kDefaultHostWindowY,
107                             kDefaultHostWindowWidth, kDefaultHostWindowHeight);
108#endif
109  std::string main_spec = spec;
110
111  float ui_scale = 1.0f;
112  std::vector<std::string> parts;
113  if (Tokenize(main_spec, "@", &parts) == 2) {
114    double scale_in_double = 0;
115    if (base::StringToDouble(parts[1], &scale_in_double))
116      ui_scale = scale_in_double;
117    main_spec = parts[0];
118  }
119
120  size_t count = Tokenize(main_spec, "/", &parts);
121  gfx::Display::Rotation rotation(gfx::Display::ROTATE_0);
122  bool has_overscan = false;
123  if (count) {
124    main_spec = parts[0];
125    if (count >= 2) {
126      std::string options = parts[1];
127      for (size_t i = 0; i < options.size(); ++i) {
128        char c = options[i];
129        switch (c) {
130          case 'o':
131            has_overscan = true;
132            break;
133          case 'r':  // rotate 90 degrees to 'right'.
134            rotation = gfx::Display::ROTATE_90;
135            break;
136          case 'u':  // 180 degrees, 'u'pside-down.
137            rotation = gfx::Display::ROTATE_180;
138            break;
139          case 'l':  // rotate 90 degrees to 'left'.
140            rotation = gfx::Display::ROTATE_270;
141            break;
142        }
143      }
144    }
145  }
146
147  float device_scale_factor = 1.0f;
148  if (!GetDisplayBounds(main_spec, &bounds_in_native, &device_scale_factor)) {
149#if defined(OS_WIN)
150    if (gfx::IsHighDPIEnabled()) {
151      device_scale_factor = gfx::GetDPIScale();
152    }
153#endif
154  }
155
156  std::vector<DisplayMode> display_modes;
157  if (Tokenize(main_spec, "#", &parts) == 2) {
158    size_t native_mode = 0;
159    int largest_area = -1;
160    float highest_refresh_rate = -1.0f;
161    main_spec = parts[0];
162    std::string resolution_list = parts[1];
163    count = Tokenize(resolution_list, "|", &parts);
164    for (size_t i = 0; i < count; ++i) {
165      DisplayMode mode;
166      gfx::Rect mode_bounds;
167      std::vector<std::string> resolution;
168      Tokenize(parts[i], "%", &resolution);
169      if (GetDisplayBounds(
170              resolution[0], &mode_bounds, &mode.device_scale_factor)) {
171        mode.size = mode_bounds.size();
172        if (resolution.size() > 1)
173          sscanf(resolution[1].c_str(), "%f", &mode.refresh_rate);
174        if (mode.size.GetArea() >= largest_area &&
175            mode.refresh_rate > highest_refresh_rate) {
176          // Use mode with largest area and highest refresh rate as native.
177          largest_area = mode.size.GetArea();
178          highest_refresh_rate = mode.refresh_rate;
179          native_mode = i;
180        }
181        display_modes.push_back(mode);
182      }
183    }
184    display_modes[native_mode].native = true;
185  }
186
187  if (id == gfx::Display::kInvalidDisplayID)
188    id = synthesized_display_id++;
189  DisplayInfo display_info(
190      id, base::StringPrintf("Display-%d", static_cast<int>(id)), has_overscan);
191  display_info.set_device_scale_factor(device_scale_factor);
192  display_info.set_rotation(rotation);
193  display_info.set_configured_ui_scale(ui_scale);
194  display_info.SetBounds(bounds_in_native);
195  display_info.set_display_modes(display_modes);
196
197  // To test the overscan, it creates the default 5% overscan.
198  if (has_overscan) {
199    int width = bounds_in_native.width() / device_scale_factor / 40;
200    int height = bounds_in_native.height() / device_scale_factor / 40;
201    display_info.SetOverscanInsets(gfx::Insets(height, width, height, width));
202    display_info.UpdateDisplaySize();
203  }
204
205  DVLOG(1) << "DisplayInfoFromSpec info=" << display_info.ToString()
206           << ", spec=" << spec;
207  return display_info;
208}
209
210DisplayInfo::DisplayInfo()
211    : id_(gfx::Display::kInvalidDisplayID),
212      has_overscan_(false),
213      rotation_(gfx::Display::ROTATE_0),
214      touch_support_(gfx::Display::TOUCH_SUPPORT_UNKNOWN),
215      touch_device_id_(0),
216      device_scale_factor_(1.0f),
217      overscan_insets_in_dip_(0, 0, 0, 0),
218      configured_ui_scale_(1.0f),
219      native_(false),
220      is_aspect_preserving_scaling_(false),
221      color_profile_(ui::COLOR_PROFILE_STANDARD) {
222}
223
224DisplayInfo::DisplayInfo(int64 id,
225                         const std::string& name,
226                         bool has_overscan)
227    : id_(id),
228      name_(name),
229      has_overscan_(has_overscan),
230      rotation_(gfx::Display::ROTATE_0),
231      touch_support_(gfx::Display::TOUCH_SUPPORT_UNKNOWN),
232      touch_device_id_(0),
233      device_scale_factor_(1.0f),
234      overscan_insets_in_dip_(0, 0, 0, 0),
235      configured_ui_scale_(1.0f),
236      native_(false),
237      color_profile_(ui::COLOR_PROFILE_STANDARD) {
238}
239
240DisplayInfo::~DisplayInfo() {
241}
242
243void DisplayInfo::Copy(const DisplayInfo& native_info) {
244  DCHECK(id_ == native_info.id_);
245  name_ = native_info.name_;
246  has_overscan_ = native_info.has_overscan_;
247
248  DCHECK(!native_info.bounds_in_native_.IsEmpty());
249  bounds_in_native_ = native_info.bounds_in_native_;
250  size_in_pixel_ = native_info.size_in_pixel_;
251  device_scale_factor_ = native_info.device_scale_factor_;
252  display_modes_ = native_info.display_modes_;
253  touch_support_ = native_info.touch_support_;
254  touch_device_id_ = native_info.touch_device_id_;
255
256  // Copy overscan_insets_in_dip_ if it's not empty. This is for test
257  // cases which use "/o" annotation which sets the overscan inset
258  // to native, and that overscan has to be propagated. This does not
259  // happen on the real environment.
260  if (!native_info.overscan_insets_in_dip_.empty())
261    overscan_insets_in_dip_ = native_info.overscan_insets_in_dip_;
262
263  // Rotation_ and ui_scale_ color_profile_ are given by preference,
264  // or unit tests. Don't copy if this native_info came from
265  // DisplayChangeObserver.
266  if (!native_info.native()) {
267    rotation_ = native_info.rotation_;
268    configured_ui_scale_ = native_info.configured_ui_scale_;
269    color_profile_ = native_info.color_profile();
270  }
271
272  available_color_profiles_ = native_info.available_color_profiles();
273
274  // Don't copy insets as it may be given by preference.  |rotation_|
275  // is treated as a native so that it can be specified in
276  // |CreateFromSpec|.
277}
278
279void DisplayInfo::SetBounds(const gfx::Rect& new_bounds_in_native) {
280  bounds_in_native_ = new_bounds_in_native;
281  size_in_pixel_ = new_bounds_in_native.size();
282  UpdateDisplaySize();
283}
284
285float DisplayInfo::GetEffectiveDeviceScaleFactor() const {
286  if (allow_upgrade_to_high_dpi && configured_ui_scale_ < 1.0f &&
287      device_scale_factor_ == 1.0f) {
288    return 2.0f;
289  } else if (device_scale_factor_ == configured_ui_scale_) {
290    return 1.0f;
291  }
292  return device_scale_factor_;
293}
294
295float DisplayInfo::GetEffectiveUIScale() const {
296  if (allow_upgrade_to_high_dpi && configured_ui_scale_ < 1.0f &&
297      device_scale_factor_ == 1.0f) {
298    return configured_ui_scale_ * 2.0f;
299  } else if (device_scale_factor_ == configured_ui_scale_) {
300    return 1.0f;
301  }
302  return configured_ui_scale_;
303}
304
305void DisplayInfo::UpdateDisplaySize() {
306  size_in_pixel_ = bounds_in_native_.size();
307  if (!overscan_insets_in_dip_.empty()) {
308    gfx::Insets insets_in_pixel =
309        overscan_insets_in_dip_.Scale(device_scale_factor_);
310    size_in_pixel_.Enlarge(-insets_in_pixel.width(), -insets_in_pixel.height());
311  } else {
312    overscan_insets_in_dip_.Set(0, 0, 0, 0);
313  }
314
315  if (rotation_ == gfx::Display::ROTATE_90 ||
316      rotation_ == gfx::Display::ROTATE_270)
317    size_in_pixel_.SetSize(size_in_pixel_.height(), size_in_pixel_.width());
318  gfx::SizeF size_f(size_in_pixel_);
319  size_f.Scale(GetEffectiveUIScale());
320  size_in_pixel_ = gfx::ToFlooredSize(size_f);
321}
322
323void DisplayInfo::SetOverscanInsets(const gfx::Insets& insets_in_dip) {
324  overscan_insets_in_dip_ = insets_in_dip;
325}
326
327gfx::Insets DisplayInfo::GetOverscanInsetsInPixel() const {
328  return overscan_insets_in_dip_.Scale(device_scale_factor_);
329}
330
331std::string DisplayInfo::ToString() const {
332  int rotation_degree = static_cast<int>(rotation_) * 90;
333  return base::StringPrintf(
334      "DisplayInfo[%lld] native bounds=%s, size=%s, scale=%f, "
335      "overscan=%s, rotation=%d, ui-scale=%f, touchscreen=%s, "
336      "touch-device-id=%d",
337      static_cast<long long int>(id_),
338      bounds_in_native_.ToString().c_str(),
339      size_in_pixel_.ToString().c_str(),
340      device_scale_factor_,
341      overscan_insets_in_dip_.ToString().c_str(),
342      rotation_degree,
343      configured_ui_scale_,
344      touch_support_ == gfx::Display::TOUCH_SUPPORT_AVAILABLE
345          ? "yes"
346          : touch_support_ == gfx::Display::TOUCH_SUPPORT_UNAVAILABLE
347                ? "no"
348                : "unknown",
349      touch_device_id_);
350}
351
352std::string DisplayInfo::ToFullString() const {
353  std::string display_modes_str;
354  std::vector<DisplayMode>::const_iterator iter = display_modes_.begin();
355  for (; iter != display_modes_.end(); ++iter) {
356    if (!display_modes_str.empty())
357      display_modes_str += ",";
358    base::StringAppendF(&display_modes_str,
359                        "(%dx%d@%f%c%s)",
360                        iter->size.width(),
361                        iter->size.height(),
362                        iter->refresh_rate,
363                        iter->interlaced ? 'I' : 'P',
364                        iter->native ? "(N)" : "");
365  }
366  return ToString() + ", display_modes==" + display_modes_str;
367}
368
369void DisplayInfo::SetColorProfile(ui::ColorCalibrationProfile profile) {
370  if (IsColorProfileAvailable(profile))
371    color_profile_ = profile;
372}
373
374bool DisplayInfo::IsColorProfileAvailable(
375    ui::ColorCalibrationProfile profile) const {
376  return std::find(available_color_profiles_.begin(),
377                   available_color_profiles_.end(),
378                   profile) != available_color_profiles_.end();
379}
380
381}  // namespace ash
382