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
26bool use_125_dsf_for_ui_scaling = false;
27
28// Check the content of |spec| and fill |bounds| and |device_scale_factor|.
29// Returns true when |bounds| is found.
30bool GetDisplayBounds(
31    const std::string& spec, gfx::Rect* bounds, float* device_scale_factor) {
32  int width = 0;
33  int height = 0;
34  int x = 0;
35  int y = 0;
36  if (sscanf(spec.c_str(), "%dx%d*%f",
37             &width, &height, device_scale_factor) >= 2 ||
38      sscanf(spec.c_str(), "%d+%d-%dx%d*%f", &x, &y, &width, &height,
39             device_scale_factor) >= 4) {
40    bounds->SetRect(x, y, width, height);
41    return true;
42  }
43  return false;
44}
45
46}  // namespace
47
48DisplayMode::DisplayMode()
49    : refresh_rate(0.0f),
50      interlaced(false),
51      native(false),
52      ui_scale(1.0f),
53      device_scale_factor(1.0f) {}
54
55DisplayMode::DisplayMode(const gfx::Size& size,
56                         float refresh_rate,
57                         bool interlaced,
58                         bool native)
59    : size(size),
60      refresh_rate(refresh_rate),
61      interlaced(interlaced),
62      native(native),
63      ui_scale(1.0f),
64      device_scale_factor(1.0f) {}
65
66gfx::Size DisplayMode::GetSizeInDIP() const {
67  gfx::SizeF size_dip(size);
68  size_dip.Scale(ui_scale);
69  // DSF=1.25 is special. The screen is drawn with DSF=1.25 in some mode but it
70  // doesn't affect the screen size computation.
71  if (!use_125_dsf_for_ui_scaling || device_scale_factor != 1.25f)
72    size_dip.Scale(1.0f / device_scale_factor);
73  return gfx::ToFlooredSize(size_dip);
74}
75
76bool DisplayMode::IsEquivalent(const DisplayMode& other) const {
77  const float kEpsilon = 0.0001f;
78  return size == other.size &&
79      std::abs(ui_scale - other.ui_scale) < kEpsilon &&
80      std::abs(device_scale_factor - other.device_scale_factor) < kEpsilon;
81}
82
83// satic
84DisplayInfo DisplayInfo::CreateFromSpec(const std::string& spec) {
85  return CreateFromSpecWithID(spec, gfx::Display::kInvalidDisplayID);
86}
87
88// static
89void DisplayInfo::SetUse125DSFForUIScaling(bool enable) {
90  use_125_dsf_for_ui_scaling = enable;
91}
92
93// static
94DisplayInfo DisplayInfo::CreateFromSpecWithID(const std::string& spec,
95                                              int64 id) {
96  // Default bounds for a display.
97  const int kDefaultHostWindowX = 200;
98  const int kDefaultHostWindowY = 200;
99  const int kDefaultHostWindowWidth = 1366;
100  const int kDefaultHostWindowHeight = 768;
101
102  // Use larger than max int to catch overflow early.
103  static int64 synthesized_display_id = 2200000000LL;
104
105#if defined(OS_WIN)
106  gfx::Rect bounds_in_native(aura::WindowTreeHost::GetNativeScreenSize());
107#else
108  gfx::Rect bounds_in_native(kDefaultHostWindowX, kDefaultHostWindowY,
109                             kDefaultHostWindowWidth, kDefaultHostWindowHeight);
110#endif
111  std::string main_spec = spec;
112
113  float ui_scale = 1.0f;
114  std::vector<std::string> parts;
115  if (Tokenize(main_spec, "@", &parts) == 2) {
116    double scale_in_double = 0;
117    if (base::StringToDouble(parts[1], &scale_in_double))
118      ui_scale = scale_in_double;
119    main_spec = parts[0];
120  }
121
122  size_t count = Tokenize(main_spec, "/", &parts);
123  gfx::Display::Rotation rotation(gfx::Display::ROTATE_0);
124  bool has_overscan = false;
125  if (count) {
126    main_spec = parts[0];
127    if (count >= 2) {
128      std::string options = parts[1];
129      for (size_t i = 0; i < options.size(); ++i) {
130        char c = options[i];
131        switch (c) {
132          case 'o':
133            has_overscan = true;
134            break;
135          case 'r':  // rotate 90 degrees to 'right'.
136            rotation = gfx::Display::ROTATE_90;
137            break;
138          case 'u':  // 180 degrees, 'u'pside-down.
139            rotation = gfx::Display::ROTATE_180;
140            break;
141          case 'l':  // rotate 90 degrees to 'left'.
142            rotation = gfx::Display::ROTATE_270;
143            break;
144        }
145      }
146    }
147  }
148
149  float device_scale_factor = 1.0f;
150  if (!GetDisplayBounds(main_spec, &bounds_in_native, &device_scale_factor)) {
151#if defined(OS_WIN)
152    if (gfx::IsHighDPIEnabled()) {
153      device_scale_factor = gfx::GetDPIScale();
154    }
155#endif
156  }
157
158  std::vector<DisplayMode> display_modes;
159  if (Tokenize(main_spec, "#", &parts) == 2) {
160    size_t native_mode = 0;
161    int largest_area = -1;
162    float highest_refresh_rate = -1.0f;
163    main_spec = parts[0];
164    std::string resolution_list = parts[1];
165    count = Tokenize(resolution_list, "|", &parts);
166    for (size_t i = 0; i < count; ++i) {
167      DisplayMode mode;
168      gfx::Rect mode_bounds;
169      std::vector<std::string> resolution;
170      Tokenize(parts[i], "%", &resolution);
171      if (GetDisplayBounds(
172              resolution[0], &mode_bounds, &mode.device_scale_factor)) {
173        mode.size = mode_bounds.size();
174        if (resolution.size() > 1)
175          sscanf(resolution[1].c_str(), "%f", &mode.refresh_rate);
176        if (mode.size.GetArea() >= largest_area &&
177            mode.refresh_rate > highest_refresh_rate) {
178          // Use mode with largest area and highest refresh rate as native.
179          largest_area = mode.size.GetArea();
180          highest_refresh_rate = mode.refresh_rate;
181          native_mode = i;
182        }
183        display_modes.push_back(mode);
184      }
185    }
186    display_modes[native_mode].native = true;
187  }
188
189  if (id == gfx::Display::kInvalidDisplayID)
190    id = synthesized_display_id++;
191  DisplayInfo display_info(
192      id, base::StringPrintf("Display-%d", static_cast<int>(id)), has_overscan);
193  display_info.set_device_scale_factor(device_scale_factor);
194  display_info.set_rotation(rotation);
195  display_info.set_configured_ui_scale(ui_scale);
196  display_info.SetBounds(bounds_in_native);
197  display_info.set_display_modes(display_modes);
198
199  // To test the overscan, it creates the default 5% overscan.
200  if (has_overscan) {
201    int width = bounds_in_native.width() / device_scale_factor / 40;
202    int height = bounds_in_native.height() / device_scale_factor / 40;
203    display_info.SetOverscanInsets(gfx::Insets(height, width, height, width));
204    display_info.UpdateDisplaySize();
205  }
206
207  DVLOG(1) << "DisplayInfoFromSpec info=" << display_info.ToString()
208           << ", spec=" << spec;
209  return display_info;
210}
211
212DisplayInfo::DisplayInfo()
213    : id_(gfx::Display::kInvalidDisplayID),
214      has_overscan_(false),
215      rotation_(gfx::Display::ROTATE_0),
216      touch_support_(gfx::Display::TOUCH_SUPPORT_UNKNOWN),
217      touch_device_id_(0),
218      device_scale_factor_(1.0f),
219      overscan_insets_in_dip_(0, 0, 0, 0),
220      configured_ui_scale_(1.0f),
221      native_(false),
222      is_aspect_preserving_scaling_(false),
223      color_profile_(ui::COLOR_PROFILE_STANDARD) {
224}
225
226DisplayInfo::DisplayInfo(int64 id,
227                         const std::string& name,
228                         bool has_overscan)
229    : id_(id),
230      name_(name),
231      has_overscan_(has_overscan),
232      rotation_(gfx::Display::ROTATE_0),
233      touch_support_(gfx::Display::TOUCH_SUPPORT_UNKNOWN),
234      touch_device_id_(0),
235      device_scale_factor_(1.0f),
236      overscan_insets_in_dip_(0, 0, 0, 0),
237      configured_ui_scale_(1.0f),
238      native_(false),
239      color_profile_(ui::COLOR_PROFILE_STANDARD) {
240}
241
242DisplayInfo::~DisplayInfo() {
243}
244
245void DisplayInfo::Copy(const DisplayInfo& native_info) {
246  DCHECK(id_ == native_info.id_);
247  name_ = native_info.name_;
248  has_overscan_ = native_info.has_overscan_;
249
250  DCHECK(!native_info.bounds_in_native_.IsEmpty());
251  bounds_in_native_ = native_info.bounds_in_native_;
252  size_in_pixel_ = native_info.size_in_pixel_;
253  device_scale_factor_ = native_info.device_scale_factor_;
254  display_modes_ = native_info.display_modes_;
255  touch_support_ = native_info.touch_support_;
256  touch_device_id_ = native_info.touch_device_id_;
257
258  // Copy overscan_insets_in_dip_ if it's not empty. This is for test
259  // cases which use "/o" annotation which sets the overscan inset
260  // to native, and that overscan has to be propagated. This does not
261  // happen on the real environment.
262  if (!native_info.overscan_insets_in_dip_.empty())
263    overscan_insets_in_dip_ = native_info.overscan_insets_in_dip_;
264
265  // Rotation_ and ui_scale_ color_profile_ are given by preference,
266  // or unit tests. Don't copy if this native_info came from
267  // DisplayChangeObserver.
268  if (!native_info.native()) {
269    rotation_ = native_info.rotation_;
270    configured_ui_scale_ = native_info.configured_ui_scale_;
271    color_profile_ = native_info.color_profile();
272  }
273
274  available_color_profiles_ = native_info.available_color_profiles();
275
276  // Don't copy insets as it may be given by preference.  |rotation_|
277  // is treated as a native so that it can be specified in
278  // |CreateFromSpec|.
279}
280
281void DisplayInfo::SetBounds(const gfx::Rect& new_bounds_in_native) {
282  bounds_in_native_ = new_bounds_in_native;
283  size_in_pixel_ = new_bounds_in_native.size();
284  UpdateDisplaySize();
285}
286
287float DisplayInfo::GetEffectiveDeviceScaleFactor() const {
288  if (use_125_dsf_for_ui_scaling && device_scale_factor_ == 1.25f)
289    return (configured_ui_scale_ == 0.8f) ? 1.25f : 1.0f;
290  if (device_scale_factor_ == configured_ui_scale_)
291    return 1.0f;
292  return device_scale_factor_;
293}
294
295float DisplayInfo::GetEffectiveUIScale() const {
296  if (use_125_dsf_for_ui_scaling && device_scale_factor_ == 1.25f)
297    return (configured_ui_scale_ == 0.8f) ? 1.0f : configured_ui_scale_;
298  if (device_scale_factor_ == configured_ui_scale_)
299    return 1.0f;
300  return configured_ui_scale_;
301}
302
303void DisplayInfo::UpdateDisplaySize() {
304  size_in_pixel_ = bounds_in_native_.size();
305  if (!overscan_insets_in_dip_.empty()) {
306    gfx::Insets insets_in_pixel =
307        overscan_insets_in_dip_.Scale(device_scale_factor_);
308    size_in_pixel_.Enlarge(-insets_in_pixel.width(), -insets_in_pixel.height());
309  } else {
310    overscan_insets_in_dip_.Set(0, 0, 0, 0);
311  }
312
313  if (rotation_ == gfx::Display::ROTATE_90 ||
314      rotation_ == gfx::Display::ROTATE_270)
315    size_in_pixel_.SetSize(size_in_pixel_.height(), size_in_pixel_.width());
316  gfx::SizeF size_f(size_in_pixel_);
317  size_f.Scale(GetEffectiveUIScale());
318  size_in_pixel_ = gfx::ToFlooredSize(size_f);
319}
320
321void DisplayInfo::SetOverscanInsets(const gfx::Insets& insets_in_dip) {
322  overscan_insets_in_dip_ = insets_in_dip;
323}
324
325gfx::Insets DisplayInfo::GetOverscanInsetsInPixel() const {
326  return overscan_insets_in_dip_.Scale(device_scale_factor_);
327}
328
329gfx::Size DisplayInfo::GetNativeModeSize() const {
330  for (size_t i = 0; i < display_modes_.size(); ++i) {
331    if (display_modes_[i].native)
332      return display_modes_[i].size;
333  }
334
335  return gfx::Size();
336}
337
338std::string DisplayInfo::ToString() const {
339  int rotation_degree = static_cast<int>(rotation_) * 90;
340  return base::StringPrintf(
341      "DisplayInfo[%lld] native bounds=%s, size=%s, scale=%f, "
342      "overscan=%s, rotation=%d, ui-scale=%f, touchscreen=%s, "
343      "touch-device-id=%d",
344      static_cast<long long int>(id_),
345      bounds_in_native_.ToString().c_str(),
346      size_in_pixel_.ToString().c_str(),
347      device_scale_factor_,
348      overscan_insets_in_dip_.ToString().c_str(),
349      rotation_degree,
350      configured_ui_scale_,
351      touch_support_ == gfx::Display::TOUCH_SUPPORT_AVAILABLE
352          ? "yes"
353          : touch_support_ == gfx::Display::TOUCH_SUPPORT_UNAVAILABLE
354                ? "no"
355                : "unknown",
356      touch_device_id_);
357}
358
359std::string DisplayInfo::ToFullString() const {
360  std::string display_modes_str;
361  std::vector<DisplayMode>::const_iterator iter = display_modes_.begin();
362  for (; iter != display_modes_.end(); ++iter) {
363    if (!display_modes_str.empty())
364      display_modes_str += ",";
365    base::StringAppendF(&display_modes_str,
366                        "(%dx%d@%f%c%s)",
367                        iter->size.width(),
368                        iter->size.height(),
369                        iter->refresh_rate,
370                        iter->interlaced ? 'I' : 'P',
371                        iter->native ? "(N)" : "");
372  }
373  return ToString() + ", display_modes==" + display_modes_str;
374}
375
376void DisplayInfo::SetColorProfile(ui::ColorCalibrationProfile profile) {
377  if (IsColorProfileAvailable(profile))
378    color_profile_ = profile;
379}
380
381bool DisplayInfo::IsColorProfileAvailable(
382    ui::ColorCalibrationProfile profile) const {
383  return std::find(available_color_profiles_.begin(),
384                   available_color_profiles_.end(),
385                   profile) != available_color_profiles_.end();
386}
387
388}  // namespace ash
389