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 // Use larger than max int to catch overflow early.
  28 const int64 kSynthesizedDisplayIdStart = 2200000000LL;
  29
  30 int64 synthesized_display_id = kSynthesizedDisplayIdStart;
  31
  32 const float kDpi96 = 96.0;
  33 bool use_125_dsf_for_ui_scaling = true;
  34
  35 // Check the content of |spec| and fill |bounds| and |device_scale_factor|.
  36 // Returns true when |bounds| is found.
  37 bool GetDisplayBounds(
  38     const std::string& spec, gfx::Rect* bounds, float* device_scale_factor) {
  39   int width = 0;
  40   int height = 0;
  41   int x = 0;
  42   int y = 0;
  43   if (sscanf(spec.c_str(), "%dx%d*%f",
  44              &width, &height, device_scale_factor) >= 2 ||
  45       sscanf(spec.c_str(), "%d+%d-%dx%d*%f", &x, &y, &width, &height,
  46              device_scale_factor) >= 4) {
  47     bounds->SetRect(x, y, width, height);
  48     return true;
  49   }
  50   return false;
  51 }
  52
  53 // Display mode list is sorted by:
  54 //  * the area in pixels in ascending order
  55 //  * refresh rate in descending order
  56 struct DisplayModeSorter {
  57   explicit DisplayModeSorter(bool is_internal) : is_internal(is_internal) {}
  58
  59   bool operator()(const DisplayMode& a, const DisplayMode& b) {
  60     gfx::Size size_a_dip = a.GetSizeInDIP(is_internal);
  61     gfx::Size size_b_dip = b.GetSizeInDIP(is_internal);
  62     if (size_a_dip.GetArea() == size_b_dip.GetArea())
  63       return (a.refresh_rate > b.refresh_rate);
  64     return (size_a_dip.GetArea() < size_b_dip.GetArea());
  65   }
  66
  67   bool is_internal;
  68 };
  69
  70 }  // namespace
  71
  72 DisplayMode::DisplayMode()
  73     : refresh_rate(0.0f),
  74       interlaced(false),
  75       native(false),
  76       ui_scale(1.0f),
  77       device_scale_factor(1.0f) {}
  78
  79 DisplayMode::DisplayMode(const gfx::Size& size,
  80                          float refresh_rate,
  81                          bool interlaced,
  82                          bool native)
  83     : size(size),
  84       refresh_rate(refresh_rate),
  85       interlaced(interlaced),
  86       native(native),
  87       ui_scale(1.0f),
  88       device_scale_factor(1.0f) {}
  89
  90 gfx::Size DisplayMode::GetSizeInDIP(bool is_internal) const {
  91   gfx::SizeF size_dip(size);
  92   size_dip.Scale(ui_scale);
  93   // DSF=1.25 is special on internal display. The screen is drawn with DSF=1.25
  94   // but it doesn't affect the screen size computation.
  95   if (use_125_dsf_for_ui_scaling && is_internal && device_scale_factor == 1.25f)
  96     return gfx::ToFlooredSize(size_dip);
  97   size_dip.Scale(1.0f / device_scale_factor);
  98   return gfx::ToFlooredSize(size_dip);
  99 }
 100
 101 bool DisplayMode::IsEquivalent(const DisplayMode& other) const {
 102   const float kEpsilon = 0.0001f;
 103   return size == other.size &&
 104       std::abs(ui_scale - other.ui_scale) < kEpsilon &&
 105       std::abs(device_scale_factor - other.device_scale_factor) < kEpsilon;
 106 }
 107
 108 // satic
 109 DisplayInfo DisplayInfo::CreateFromSpec(const std::string& spec) {
 110   return CreateFromSpecWithID(spec, gfx::Display::kInvalidDisplayID);
 111 }
 112
 113 // static
 114 DisplayInfo DisplayInfo::CreateFromSpecWithID(const std::string& spec,
 115                                               int64 id) {
 116 #if defined(OS_WIN)
 117   gfx::Rect bounds_in_native(aura::WindowTreeHost::GetNativeScreenSize());
 118 #else
 119   // Default bounds for a display.
 120   const int kDefaultHostWindowX = 200;
 121   const int kDefaultHostWindowY = 200;
 122   const int kDefaultHostWindowWidth = 1366;
 123   const int kDefaultHostWindowHeight = 768;
 124   gfx::Rect bounds_in_native(kDefaultHostWindowX, kDefaultHostWindowY,
 125                              kDefaultHostWindowWidth, kDefaultHostWindowHeight);
 126 #endif
 127   std::string main_spec = spec;
 128
 129   float ui_scale = 1.0f;
 130   std::vector<std::string> parts = base::SplitString(
 131       main_spec, "@", base::KEEP_WHITESPACE, base::SPLIT_WANT_NONEMPTY);
 132   if (parts.size() == 2) {
 133     double scale_in_double = 0;
 134     if (base::StringToDouble(parts[1], &scale_in_double))
 135       ui_scale = scale_in_double;
 136     main_spec = parts[0];
 137   }
 138
 139   parts = base::SplitString(main_spec, "/", base::KEEP_WHITESPACE,
 140                             base::SPLIT_WANT_NONEMPTY);
 141   gfx::Display::Rotation rotation(gfx::Display::ROTATE_0);
 142   bool has_overscan = false;
 143   if (!parts.empty()) {
 144     main_spec = parts[0];
 145     if (parts.size() >= 2) {
 146       std::string options = parts[1];
 147       for (size_t i = 0; i < options.size(); ++i) {
 148         char c = options[i];
 149         switch (c) {
 150           case 'o':
 151             has_overscan = true;
 152             break;
 153           case 'r':  // rotate 90 degrees to 'right'.
 154             rotation = gfx::Display::ROTATE_90;
 155             break;
 156           case 'u':  // 180 degrees, 'u'pside-down.
 157             rotation = gfx::Display::ROTATE_180;
 158             break;
 159           case 'l':  // rotate 90 degrees to 'left'.
 160             rotation = gfx::Display::ROTATE_270;
 161             break;
 162         }
 163       }
 164     }
 165   }
 166
 167   float device_scale_factor = 1.0f;
 168   if (!GetDisplayBounds(main_spec, &bounds_in_native, &device_scale_factor)) {
 169 #if defined(OS_WIN)
 170     device_scale_factor = gfx::GetDPIScale();
 171 #endif
 172   }
 173
 174   std::vector<DisplayMode> display_modes;
 175   parts = base::SplitString(main_spec, "#", base::KEEP_WHITESPACE,
 176                             base::SPLIT_WANT_NONEMPTY);
 177   if (parts.size() == 2) {
 178     size_t native_mode = 0;
 179     int largest_area = -1;
 180     float highest_refresh_rate = -1.0f;
 181     main_spec = parts[0];
 182     std::string resolution_list = parts[1];
 183     parts = base::SplitString(resolution_list, "|", base::KEEP_WHITESPACE,
 184                               base::SPLIT_WANT_NONEMPTY);
 185     for (size_t i = 0; i < parts.size(); ++i) {
 186       DisplayMode mode;
 187       gfx::Rect mode_bounds;
 188       std::vector<std::string> resolution = base::SplitString(
 189           parts[i], "%", base::KEEP_WHITESPACE, base::SPLIT_WANT_NONEMPTY);
 190       if (GetDisplayBounds(
 191               resolution[0], &mode_bounds, &mode.device_scale_factor)) {
 192         mode.size = mode_bounds.size();
 193         if (resolution.size() > 1)
 194           sscanf(resolution[1].c_str(), "%f", &mode.refresh_rate);
 195         if (mode.size.GetArea() >= largest_area &&
 196             mode.refresh_rate > highest_refresh_rate) {
 197           // Use mode with largest area and highest refresh rate as native.
 198           largest_area = mode.size.GetArea();
 199           highest_refresh_rate = mode.refresh_rate;
 200           native_mode = i;
 201         }
 202         display_modes.push_back(mode);
 203       }
 204     }
 205     display_modes[native_mode].native = true;
 206   }
 207
 208   if (id == gfx::Display::kInvalidDisplayID)
 209     id = synthesized_display_id++;
 210   DisplayInfo display_info(
 211       id, base::StringPrintf("Display-%d", static_cast<int>(id)), has_overscan);
 212   display_info.set_device_scale_factor(device_scale_factor);
 213   display_info.SetRotation(rotation, gfx::Display::ROTATION_SOURCE_ACTIVE);
 214   display_info.set_configured_ui_scale(ui_scale);
 215   display_info.SetBounds(bounds_in_native);
 216   display_info.SetDisplayModes(display_modes);
 217
 218   // To test the overscan, it creates the default 5% overscan.
 219   if (has_overscan) {
 220     int width = bounds_in_native.width() / device_scale_factor / 40;
 221     int height = bounds_in_native.height() / device_scale_factor / 40;
 222     display_info.SetOverscanInsets(gfx::Insets(height, width, height, width));
 223     display_info.UpdateDisplaySize();
 224   }
 225
 226   DVLOG(1) << "DisplayInfoFromSpec info=" << display_info.ToString()
 227            << ", spec=" << spec;
 228   return display_info;
 229 }
 230
 231 // static
 232 void DisplayInfo::SetUse125DSFForUIScalingForTest(bool enable) {
 233   use_125_dsf_for_ui_scaling = enable;
 234 }
 235
 236 DisplayInfo::DisplayInfo()
 237     : id_(gfx::Display::kInvalidDisplayID),
 238       has_overscan_(false),
 239       touch_support_(gfx::Display::TOUCH_SUPPORT_UNKNOWN),
 240       device_scale_factor_(1.0f),
 241       device_dpi_(kDpi96),
 242       overscan_insets_in_dip_(0, 0, 0, 0),
 243       configured_ui_scale_(1.0f),
 244       native_(false),
 245       is_aspect_preserving_scaling_(false),
 246       clear_overscan_insets_(false),
 247       color_profile_(ui::COLOR_PROFILE_STANDARD) {}
 248
 249 DisplayInfo::DisplayInfo(int64 id, const std::string& name, bool has_overscan)
 250     : id_(id),
 251       name_(name),
 252       has_overscan_(has_overscan),
 253       touch_support_(gfx::Display::TOUCH_SUPPORT_UNKNOWN),
 254       device_scale_factor_(1.0f),
 255       device_dpi_(kDpi96),
 256       overscan_insets_in_dip_(0, 0, 0, 0),
 257       configured_ui_scale_(1.0f),
 258       native_(false),
 259       is_aspect_preserving_scaling_(false),
 260       clear_overscan_insets_(false),
 261       color_profile_(ui::COLOR_PROFILE_STANDARD) {}
 262
 263 DisplayInfo::~DisplayInfo() {
 264 }
 265
 266 void DisplayInfo::SetRotation(gfx::Display::Rotation rotation,
 267                               gfx::Display::RotationSource source) {
 268   rotations_[source] = rotation;
 269   rotations_[gfx::Display::ROTATION_SOURCE_ACTIVE] = rotation;
 270 }
 271
 272 gfx::Display::Rotation DisplayInfo::GetActiveRotation() const {
 273   return GetRotation(gfx::Display::ROTATION_SOURCE_ACTIVE);
 274 }
 275
 276 gfx::Display::Rotation DisplayInfo::GetRotation(
 277     gfx::Display::RotationSource source) const {
 278   if (rotations_.find(source) == rotations_.end())
 279     return gfx::Display::ROTATE_0;
 280   return rotations_.at(source);
 281 }
 282
 283 void DisplayInfo::Copy(const DisplayInfo& native_info) {
 284   DCHECK(id_ == native_info.id_);
 285   name_ = native_info.name_;
 286   has_overscan_ = native_info.has_overscan_;
 287
 288   touch_support_ = native_info.touch_support_;
 289   input_devices_ = native_info.input_devices_;
 290   device_scale_factor_ = native_info.device_scale_factor_;
 291   DCHECK(!native_info.bounds_in_native_.IsEmpty());
 292   bounds_in_native_ = native_info.bounds_in_native_;
 293   device_dpi_ = native_info.device_dpi_;
 294   size_in_pixel_ = native_info.size_in_pixel_;
 295   is_aspect_preserving_scaling_ = native_info.is_aspect_preserving_scaling_;
 296   display_modes_ = native_info.display_modes_;
 297   available_color_profiles_ = native_info.available_color_profiles_;
 298
 299   // Rotation, ui_scale, color_profile and overscan are given by preference,
 300   // or unit tests. Don't copy if this native_info came from
 301   // DisplayChangeObserver.
 302   if (!native_info.native()) {
 303     // Update the overscan_insets_in_dip_ either if the inset should be
 304     // cleared, or has non empty insts.
 305     if (native_info.clear_overscan_insets())
 306       overscan_insets_in_dip_.Set(0, 0, 0, 0);
 307     else if (!native_info.overscan_insets_in_dip_.empty())
 308       overscan_insets_in_dip_ = native_info.overscan_insets_in_dip_;
 309
 310     rotations_ = native_info.rotations_;
 311     configured_ui_scale_ = native_info.configured_ui_scale_;
 312     color_profile_ = native_info.color_profile();
 313   }
 314 }
 315
 316 void DisplayInfo::SetBounds(const gfx::Rect& new_bounds_in_native) {
 317   bounds_in_native_ = new_bounds_in_native;
 318   size_in_pixel_ = new_bounds_in_native.size();
 319   UpdateDisplaySize();
 320 }
 321
 322 float DisplayInfo::GetEffectiveDeviceScaleFactor() const {
 323   if (Use125DSFForUIScaling() && device_scale_factor_ == 1.25f)
 324     return (configured_ui_scale_ == 0.8f) ? 1.25f : 1.0f;
 325   if (device_scale_factor_ == configured_ui_scale_)
 326     return 1.0f;
 327   return device_scale_factor_;
 328 }
 329
 330 float DisplayInfo::GetEffectiveUIScale() const {
 331   if (Use125DSFForUIScaling() && device_scale_factor_ == 1.25f)
 332     return (configured_ui_scale_ == 0.8f) ? 1.0f : configured_ui_scale_;
 333   if (device_scale_factor_ == configured_ui_scale_)
 334     return 1.0f;
 335   return configured_ui_scale_;
 336 }
 337
 338 void DisplayInfo::UpdateDisplaySize() {
 339   size_in_pixel_ = bounds_in_native_.size();
 340   if (!overscan_insets_in_dip_.empty()) {
 341     gfx::Insets insets_in_pixel =
 342         overscan_insets_in_dip_.Scale(device_scale_factor_);
 343     size_in_pixel_.Enlarge(-insets_in_pixel.width(), -insets_in_pixel.height());
 344   } else {
 345     overscan_insets_in_dip_.Set(0, 0, 0, 0);
 346   }
 347
 348   if (GetActiveRotation() == gfx::Display::ROTATE_90 ||
 349       GetActiveRotation() == gfx::Display::ROTATE_270) {
 350     size_in_pixel_.SetSize(size_in_pixel_.height(), size_in_pixel_.width());
 351   }
 352   gfx::SizeF size_f(size_in_pixel_);
 353   size_f.Scale(GetEffectiveUIScale());
 354   size_in_pixel_ = gfx::ToFlooredSize(size_f);
 355 }
 356
 357 void DisplayInfo::SetOverscanInsets(const gfx::Insets& insets_in_dip) {
 358   overscan_insets_in_dip_ = insets_in_dip;
 359 }
 360
 361 gfx::Insets DisplayInfo::GetOverscanInsetsInPixel() const {
 362   return overscan_insets_in_dip_.Scale(device_scale_factor_);
 363 }
 364
 365 void DisplayInfo::SetDisplayModes(
 366     const std::vector<DisplayMode>& display_modes) {
 367   display_modes_ = display_modes;
 368   std::sort(display_modes_.begin(), display_modes_.end(),
 369             DisplayModeSorter(gfx::Display::IsInternalDisplayId(id_)));
 370 }
 371
 372 gfx::Size DisplayInfo::GetNativeModeSize() const {
 373   for (size_t i = 0; i < display_modes_.size(); ++i) {
 374     if (display_modes_[i].native)
 375       return display_modes_[i].size;
 376   }
 377
 378   return gfx::Size();
 379 }
 380
 381 std::string DisplayInfo::ToString() const {
 382   int rotation_degree = static_cast<int>(GetActiveRotation()) * 90;
 383   std::string devices_str;
 384
 385   for (size_t i = 0; i < input_devices_.size(); ++i) {
 386     devices_str += base::IntToString(input_devices_[i]);
 387     if (i != input_devices_.size() - 1)
 388       devices_str += ", ";
 389   }
 390
 391   std::string result = base::StringPrintf(
 392       "DisplayInfo[%lld] native bounds=%s, size=%s, scale=%f, "
 393       "overscan=%s, rotation=%d, ui-scale=%f, touchscreen=%s, "
 394       "input_devices=[%s]",
 395       static_cast<long long int>(id_), bounds_in_native_.ToString().c_str(),
 396       size_in_pixel_.ToString().c_str(), device_scale_factor_,
 397       overscan_insets_in_dip_.ToString().c_str(), rotation_degree,
 398       configured_ui_scale_,
 399       touch_support_ == gfx::Display::TOUCH_SUPPORT_AVAILABLE
 400           ? "yes"
 401           : touch_support_ == gfx::Display::TOUCH_SUPPORT_UNAVAILABLE
 402                 ? "no"
 403                 : "unknown",
 404       devices_str.c_str());
 405
 406   return result;
 407 }
 408
 409 std::string DisplayInfo::ToFullString() const {
 410   std::string display_modes_str;
 411   std::vector<DisplayMode>::const_iterator iter = display_modes_.begin();
 412   for (; iter != display_modes_.end(); ++iter) {
 413     if (!display_modes_str.empty())
 414       display_modes_str += ",";
 415     base::StringAppendF(&display_modes_str,
 416                         "(%dx%d@%f%c%s)",
 417                         iter->size.width(),
 418                         iter->size.height(),
 419                         iter->refresh_rate,
 420                         iter->interlaced ? 'I' : 'P',
 421                         iter->native ? "(N)" : "");
 422   }
 423   return ToString() + ", display_modes==" + display_modes_str;
 424 }
 425
 426 void DisplayInfo::SetColorProfile(ui::ColorCalibrationProfile profile) {
 427   if (IsColorProfileAvailable(profile))
 428     color_profile_ = profile;
 429 }
 430
 431 bool DisplayInfo::IsColorProfileAvailable(
 432     ui::ColorCalibrationProfile profile) const {
 433   return std::find(available_color_profiles_.begin(),
 434                    available_color_profiles_.end(),
 435                    profile) != available_color_profiles_.end();
 436 }
 437
 438 bool DisplayInfo::Use125DSFForUIScaling() const {
 439   return use_125_dsf_for_ui_scaling && gfx::Display::IsInternalDisplayId(id_);
 440 }
 441
 442 void DisplayInfo::AddInputDevice(int id) {
 443   input_devices_.push_back(id);
 444 }
 445
 446 void DisplayInfo::ClearInputDevices() {
 447   input_devices_.clear();
 448 }
 449
 450 void ResetDisplayIdForTest() {
 451   synthesized_display_id = kSynthesizedDisplayIdStart;
 452 }
 453
 454 }  // namespace ash