ash/display/display_info.cc

   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_split.h"
  13 #include "base/strings/string_util.h"
  14 #include "base/strings/stringprintf.h"
  15 #include "ui/gfx/display.h"
  16 #include "ui/gfx/geometry/size_conversions.h"
  17 #include "ui/gfx/geometry/size_f.h"
  18
  19 #if defined(OS_WIN)
  20 #include "ui/aura/window_tree_host.h"
  21 #include "ui/gfx/win/dpi.h"
  22 #endif
  23
  24 namespace ash {
  25 namespace {
  26
  27 bool use_125_dsf_for_ui_scaling = true;
  28
  29 // Check the content of |spec| and fill |bounds| and |device_scale_factor|.
  30 // Returns true when |bounds| is found.
  31 bool 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 // Display mode list is sorted by:
  48 //  * the area in pixels in ascending order
  49 //  * refresh rate in descending order
  50 struct DisplayModeSorter {
  51   explicit DisplayModeSorter(bool is_internal) : is_internal(is_internal) {}
  52
  53   bool operator()(const DisplayMode& a, const DisplayMode& b) {
  54     gfx::Size size_a_dip = a.GetSizeInDIP(is_internal);
  55     gfx::Size size_b_dip = b.GetSizeInDIP(is_internal);
  56     if (size_a_dip.GetArea() == size_b_dip.GetArea())
  57       return (a.refresh_rate > b.refresh_rate);
  58     return (size_a_dip.GetArea() < size_b_dip.GetArea());
  59   }
  60
  61   bool is_internal;
  62 };
  63
  64 }  // namespace
  65
  66 DisplayMode::DisplayMode()
  67     : refresh_rate(0.0f),
  68       interlaced(false),
  69       native(false),
  70       ui_scale(1.0f),
  71       device_scale_factor(1.0f) {}
  72
  73 DisplayMode::DisplayMode(const gfx::Size& size,
  74                          float refresh_rate,
  75                          bool interlaced,
  76                          bool native)
  77     : size(size),
  78       refresh_rate(refresh_rate),
  79       interlaced(interlaced),
  80       native(native),
  81       ui_scale(1.0f),
  82       device_scale_factor(1.0f) {}
  83
  84 gfx::Size DisplayMode::GetSizeInDIP(bool is_internal) const {
  85   gfx::SizeF size_dip(size);
  86   size_dip.Scale(ui_scale);
  87   // DSF=1.25 is special on internal display. The screen is drawn with DSF=1.25
  88   // but it doesn't affect the screen size computation.
  89   if (use_125_dsf_for_ui_scaling && is_internal && device_scale_factor == 1.25f)
  90     return gfx::ToFlooredSize(size_dip);
  91   size_dip.Scale(1.0f / device_scale_factor);
  92   return gfx::ToFlooredSize(size_dip);
  93 }
  94
  95 bool DisplayMode::IsEquivalent(const DisplayMode& other) const {
  96   const float kEpsilon = 0.0001f;
  97   return size == other.size &&
  98       std::abs(ui_scale - other.ui_scale) < kEpsilon &&
  99       std::abs(device_scale_factor - other.device_scale_factor) < kEpsilon;
 100 }
 101
 102 // satic
 103 DisplayInfo DisplayInfo::CreateFromSpec(const std::string& spec) {
 104   return CreateFromSpecWithID(spec, gfx::Display::kInvalidDisplayID);
 105 }
 106
 107 // static
 108 DisplayInfo DisplayInfo::CreateFromSpecWithID(const std::string& spec,
 109                                               int64 id) {
 110   // Use larger than max int to catch overflow early.
 111   static int64 synthesized_display_id = 2200000000LL;
 112
 113 #if defined(OS_WIN)
 114   gfx::Rect bounds_in_native(aura::WindowTreeHost::GetNativeScreenSize());
 115 #else
 116   // Default bounds for a display.
 117   const int kDefaultHostWindowX = 200;
 118   const int kDefaultHostWindowY = 200;
 119   const int kDefaultHostWindowWidth = 1366;
 120   const int kDefaultHostWindowHeight = 768;
 121   gfx::Rect bounds_in_native(kDefaultHostWindowX, kDefaultHostWindowY,
 122                              kDefaultHostWindowWidth, kDefaultHostWindowHeight);
 123 #endif
 124   std::string main_spec = spec;
 125
 126   float ui_scale = 1.0f;
 127   std::vector<std::string> parts = base::SplitString(
 128       main_spec, "@", base::KEEP_WHITESPACE, base::SPLIT_WANT_NONEMPTY);
 129   if (parts.size() == 2) {
 130     double scale_in_double = 0;
 131     if (base::StringToDouble(parts[1], &scale_in_double))
 132       ui_scale = scale_in_double;
 133     main_spec = parts[0];
 134   }
 135
 136   parts = base::SplitString(main_spec, "/", base::KEEP_WHITESPACE,
 137                             base::SPLIT_WANT_NONEMPTY);
 138   gfx::Display::Rotation rotation(gfx::Display::ROTATE_0);
 139   bool has_overscan = false;
 140   if (!parts.empty()) {
 141     main_spec = parts[0];
 142     if (parts.size() >= 2) {
 143       std::string options = parts[1];
 144       for (size_t i = 0; i < options.size(); ++i) {
 145         char c = options[i];
 146         switch (c) {
 147           case 'o':
 148             has_overscan = true;
 149             break;
 150           case 'r':  // rotate 90 degrees to 'right'.
 151             rotation = gfx::Display::ROTATE_90;
 152             break;
 153           case 'u':  // 180 degrees, 'u'pside-down.
 154             rotation = gfx::Display::ROTATE_180;
 155             break;
 156           case 'l':  // rotate 90 degrees to 'left'.
 157             rotation = gfx::Display::ROTATE_270;
 158             break;
 159         }
 160       }
 161     }
 162   }
 163
 164   float device_scale_factor = 1.0f;
 165   if (!GetDisplayBounds(main_spec, &bounds_in_native, &device_scale_factor)) {
 166 #if defined(OS_WIN)
 167     device_scale_factor = gfx::GetDPIScale();
 168 #endif
 169   }
 170
 171   std::vector<DisplayMode> display_modes;
 172   parts = base::SplitString(main_spec, "#", base::KEEP_WHITESPACE,
 173                             base::SPLIT_WANT_NONEMPTY);
 174   if (parts.size() == 2) {
 175     size_t native_mode = 0;
 176     int largest_area = -1;
 177     float highest_refresh_rate = -1.0f;
 178     main_spec = parts[0];
 179     std::string resolution_list = parts[1];
 180     parts = base::SplitString(resolution_list, "|", base::KEEP_WHITESPACE,
 181                               base::SPLIT_WANT_NONEMPTY);
 182     for (size_t i = 0; i < parts.size(); ++i) {
 183       DisplayMode mode;
 184       gfx::Rect mode_bounds;
 185       std::vector<std::string> resolution = base::SplitString(
 186           parts[i], "%", base::KEEP_WHITESPACE, base::SPLIT_WANT_NONEMPTY);
 187       if (GetDisplayBounds(
 188               resolution[0], &mode_bounds, &mode.device_scale_factor)) {
 189         mode.size = mode_bounds.size();
 190         if (resolution.size() > 1)
 191           sscanf(resolution[1].c_str(), "%f", &mode.refresh_rate);
 192         if (mode.size.GetArea() >= largest_area &&
 193             mode.refresh_rate > highest_refresh_rate) {
 194           // Use mode with largest area and highest refresh rate as native.
 195           largest_area = mode.size.GetArea();
 196           highest_refresh_rate = mode.refresh_rate;
 197           native_mode = i;
 198         }
 199         display_modes.push_back(mode);
 200       }
 201     }
 202     display_modes[native_mode].native = true;
 203   }
 204
 205   if (id == gfx::Display::kInvalidDisplayID)
 206     id = synthesized_display_id++;
 207   DisplayInfo display_info(
 208       id, base::StringPrintf("Display-%d", static_cast<int>(id)), has_overscan);
 209   display_info.set_device_scale_factor(device_scale_factor);
 210   display_info.SetRotation(rotation, gfx::Display::ROTATION_SOURCE_ACTIVE);
 211   display_info.set_configured_ui_scale(ui_scale);
 212   display_info.SetBounds(bounds_in_native);
 213   display_info.SetDisplayModes(display_modes);
 214
 215   // To test the overscan, it creates the default 5% overscan.
 216   if (has_overscan) {
 217     int width = bounds_in_native.width() / device_scale_factor / 40;
 218     int height = bounds_in_native.height() / device_scale_factor / 40;
 219     display_info.SetOverscanInsets(gfx::Insets(height, width, height, width));
 220     display_info.UpdateDisplaySize();
 221   }
 222
 223   DVLOG(1) << "DisplayInfoFromSpec info=" << display_info.ToString()
 224            << ", spec=" << spec;
 225   return display_info;
 226 }
 227
 228 // static
 229 void DisplayInfo::SetUse125DSFForUIScalingForTest(bool enable) {
 230   use_125_dsf_for_ui_scaling = enable;
 231 }
 232
 233 DisplayInfo::DisplayInfo()
 234     : id_(gfx::Display::kInvalidDisplayID),
 235       has_overscan_(false),
 236       touch_support_(gfx::Display::TOUCH_SUPPORT_UNKNOWN),
 237       device_scale_factor_(1.0f),
 238       overscan_insets_in_dip_(0, 0, 0, 0),
 239       configured_ui_scale_(1.0f),
 240       native_(false),
 241       is_aspect_preserving_scaling_(false),
 242       clear_overscan_insets_(false),
 243       color_profile_(ui::COLOR_PROFILE_STANDARD) {
 244 }
 245
 246 DisplayInfo::DisplayInfo(int64 id,
 247                          const std::string& name,
 248                          bool has_overscan)
 249     : id_(id),
 250       name_(name),
 251       has_overscan_(has_overscan),
 252       touch_support_(gfx::Display::TOUCH_SUPPORT_UNKNOWN),
 253       device_scale_factor_(1.0f),
 254       overscan_insets_in_dip_(0, 0, 0, 0),
 255       configured_ui_scale_(1.0f),
 256       native_(false),
 257       is_aspect_preserving_scaling_(false),
 258       clear_overscan_insets_(false),
 259       color_profile_(ui::COLOR_PROFILE_STANDARD) {
 260 }
 261
 262 DisplayInfo::~DisplayInfo() {
 263 }
 264
 265 void DisplayInfo::SetRotation(gfx::Display::Rotation rotation,
 266                               gfx::Display::RotationSource source) {
 267   rotations_[source] = rotation;
 268   rotations_[gfx::Display::ROTATION_SOURCE_ACTIVE] = rotation;
 269 }
 270
 271 gfx::Display::Rotation DisplayInfo::GetActiveRotation() const {
 272   return GetRotation(gfx::Display::ROTATION_SOURCE_ACTIVE);
 273 }
 274
 275 gfx::Display::Rotation DisplayInfo::GetRotation(
 276     gfx::Display::RotationSource source) const {
 277   if (rotations_.find(source) == rotations_.end())
 278     return gfx::Display::ROTATE_0;
 279   return rotations_.at(source);
 280 }
 281
 282 void DisplayInfo::Copy(const DisplayInfo& native_info) {
 283   DCHECK(id_ == native_info.id_);
 284   name_ = native_info.name_;
 285   has_overscan_ = native_info.has_overscan_;
 286
 287   touch_support_ = native_info.touch_support_;
 288   input_devices_ = native_info.input_devices_;
 289   device_scale_factor_ = native_info.device_scale_factor_;
 290   DCHECK(!native_info.bounds_in_native_.IsEmpty());
 291   bounds_in_native_ = native_info.bounds_in_native_;
 292   size_in_pixel_ = native_info.size_in_pixel_;
 293   is_aspect_preserving_scaling_ = native_info.is_aspect_preserving_scaling_;
 294   display_modes_ = native_info.display_modes_;
 295   available_color_profiles_ = native_info.available_color_profiles_;
 296
 297   // Rotation, ui_scale, color_profile and overscan are given by preference,
 298   // or unit tests. Don't copy if this native_info came from
 299   // DisplayChangeObserver.
 300   if (!native_info.native()) {
 301     // Update the overscan_insets_in_dip_ either if the inset should be
 302     // cleared, or has non empty insts.
 303     if (native_info.clear_overscan_insets())
 304       overscan_insets_in_dip_.Set(0, 0, 0, 0);
 305     else if (!native_info.overscan_insets_in_dip_.empty())
 306       overscan_insets_in_dip_ = native_info.overscan_insets_in_dip_;
 307
 308     rotations_ = native_info.rotations_;
 309     configured_ui_scale_ = native_info.configured_ui_scale_;
 310     color_profile_ = native_info.color_profile();
 311   }
 312 }
 313
 314 void DisplayInfo::SetBounds(const gfx::Rect& new_bounds_in_native) {
 315   bounds_in_native_ = new_bounds_in_native;
 316   size_in_pixel_ = new_bounds_in_native.size();
 317   UpdateDisplaySize();
 318 }
 319
 320 float DisplayInfo::GetEffectiveDeviceScaleFactor() const {
 321   if (Use125DSFForUIScaling() && device_scale_factor_ == 1.25f)
 322     return (configured_ui_scale_ == 0.8f) ? 1.25f : 1.0f;
 323   if (device_scale_factor_ == configured_ui_scale_)
 324     return 1.0f;
 325   return device_scale_factor_;
 326 }
 327
 328 float DisplayInfo::GetEffectiveUIScale() const {
 329   if (Use125DSFForUIScaling() && device_scale_factor_ == 1.25f)
 330     return (configured_ui_scale_ == 0.8f) ? 1.0f : configured_ui_scale_;
 331   if (device_scale_factor_ == configured_ui_scale_)
 332     return 1.0f;
 333   return configured_ui_scale_;
 334 }
 335
 336 void DisplayInfo::UpdateDisplaySize() {
 337   size_in_pixel_ = bounds_in_native_.size();
 338   if (!overscan_insets_in_dip_.empty()) {
 339     gfx::Insets insets_in_pixel =
 340         overscan_insets_in_dip_.Scale(device_scale_factor_);
 341     size_in_pixel_.Enlarge(-insets_in_pixel.width(), -insets_in_pixel.height());
 342   } else {
 343     overscan_insets_in_dip_.Set(0, 0, 0, 0);
 344   }
 345
 346   if (GetActiveRotation() == gfx::Display::ROTATE_90 ||
 347       GetActiveRotation() == gfx::Display::ROTATE_270) {
 348     size_in_pixel_.SetSize(size_in_pixel_.height(), size_in_pixel_.width());
 349   }
 350   gfx::SizeF size_f(size_in_pixel_);
 351   size_f.Scale(GetEffectiveUIScale());
 352   size_in_pixel_ = gfx::ToFlooredSize(size_f);
 353 }
 354
 355 void DisplayInfo::SetOverscanInsets(const gfx::Insets& insets_in_dip) {
 356   overscan_insets_in_dip_ = insets_in_dip;
 357 }
 358
 359 gfx::Insets DisplayInfo::GetOverscanInsetsInPixel() const {
 360   return overscan_insets_in_dip_.Scale(device_scale_factor_);
 361 }
 362
 363 void DisplayInfo::SetDisplayModes(
 364     const std::vector<DisplayMode>& display_modes) {
 365   display_modes_ = display_modes;
 366   std::sort(display_modes_.begin(), display_modes_.end(),
 367             DisplayModeSorter(gfx::Display::IsInternalDisplayId(id_)));
 368 }
 369
 370 gfx::Size DisplayInfo::GetNativeModeSize() const {
 371   for (size_t i = 0; i < display_modes_.size(); ++i) {
 372     if (display_modes_[i].native)
 373       return display_modes_[i].size;
 374   }
 375
 376   return gfx::Size();
 377 }
 378
 379 std::string DisplayInfo::ToString() const {
 380   int rotation_degree = static_cast<int>(GetActiveRotation()) * 90;
 381   std::string devices_str;
 382
 383   for (size_t i = 0; i < input_devices_.size(); ++i) {
 384     devices_str += base::IntToString(input_devices_[i]);
 385     if (i != input_devices_.size() - 1)
 386       devices_str += ", ";
 387   }
 388
 389   std::string result = base::StringPrintf(
 390       "DisplayInfo[%lld] native bounds=%s, size=%s, scale=%f, "
 391       "overscan=%s, rotation=%d, ui-scale=%f, touchscreen=%s, "
 392       "input_devices=[%s]",
 393       static_cast<long long int>(id_), bounds_in_native_.ToString().c_str(),
 394       size_in_pixel_.ToString().c_str(), device_scale_factor_,
 395       overscan_insets_in_dip_.ToString().c_str(), rotation_degree,
 396       configured_ui_scale_,
 397       touch_support_ == gfx::Display::TOUCH_SUPPORT_AVAILABLE
 398           ? "yes"
 399           : touch_support_ == gfx::Display::TOUCH_SUPPORT_UNAVAILABLE
 400                 ? "no"
 401                 : "unknown",
 402       devices_str.c_str());
 403
 404   return result;
 405 }
 406
 407 std::string DisplayInfo::ToFullString() const {
 408   std::string display_modes_str;
 409   std::vector<DisplayMode>::const_iterator iter = display_modes_.begin();
 410   for (; iter != display_modes_.end(); ++iter) {
 411     if (!display_modes_str.empty())
 412       display_modes_str += ",";
 413     base::StringAppendF(&display_modes_str,
 414                         "(%dx%d@%f%c%s)",
 415                         iter->size.width(),
 416                         iter->size.height(),
 417                         iter->refresh_rate,
 418                         iter->interlaced ? 'I' : 'P',
 419                         iter->native ? "(N)" : "");
 420   }
 421   return ToString() + ", display_modes==" + display_modes_str;
 422 }
 423
 424 void DisplayInfo::SetColorProfile(ui::ColorCalibrationProfile profile) {
 425   if (IsColorProfileAvailable(profile))
 426     color_profile_ = profile;
 427 }
 428
 429 bool DisplayInfo::IsColorProfileAvailable(
 430     ui::ColorCalibrationProfile profile) const {
 431   return std::find(available_color_profiles_.begin(),
 432                    available_color_profiles_.end(),
 433                    profile) != available_color_profiles_.end();
 434 }
 435
 436 bool DisplayInfo::Use125DSFForUIScaling() const {
 437   return use_125_dsf_for_ui_scaling && gfx::Display::IsInternalDisplayId(id_);
 438 }
 439
 440 void DisplayInfo::AddInputDevice(int id) {
 441   input_devices_.push_back(id);
 442 }
 443
 444 void DisplayInfo::ClearInputDevices() {
 445   input_devices_.clear();
 446 }
 447
 448 }  // namespace ash