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 bool use_125_dsf_for_ui_scaling = true;
  33
  34 // Check the content of |spec| and fill |bounds| and |device_scale_factor|.
  35 // Returns true when |bounds| is found.
  36 bool GetDisplayBounds(
  37     const std::string& spec, gfx::Rect* bounds, float* device_scale_factor) {
  38   int width = 0;
  39   int height = 0;
  40   int x = 0;
  41   int y = 0;
  42   if (sscanf(spec.c_str(), "%dx%d*%f",
  43              &width, &height, device_scale_factor) >= 2 ||
  44       sscanf(spec.c_str(), "%d+%d-%dx%d*%f", &x, &y, &width, &height,
  45              device_scale_factor) >= 4) {
  46     bounds->SetRect(x, y, width, height);
  47     return true;
  48   }
  49   return false;
  50 }
  51
  52 // Display mode list is sorted by:
  53 //  * the area in pixels in ascending order
  54 //  * refresh rate in descending order
  55 struct DisplayModeSorter {
  56   explicit DisplayModeSorter(bool is_internal) : is_internal(is_internal) {}
  57
  58   bool operator()(const DisplayMode& a, const DisplayMode& b) {
  59     gfx::Size size_a_dip = a.GetSizeInDIP(is_internal);
  60     gfx::Size size_b_dip = b.GetSizeInDIP(is_internal);
  61     if (size_a_dip.GetArea() == size_b_dip.GetArea())
  62       return (a.refresh_rate > b.refresh_rate);
  63     return (size_a_dip.GetArea() < size_b_dip.GetArea());
  64   }
  65
  66   bool is_internal;
  67 };
  68
  69 }  // namespace
  70
  71 DisplayMode::DisplayMode()
  72     : refresh_rate(0.0f),
  73       interlaced(false),
  74       native(false),
  75       ui_scale(1.0f),
  76       device_scale_factor(1.0f) {}
  77
  78 DisplayMode::DisplayMode(const gfx::Size& size,
  79                          float refresh_rate,
  80                          bool interlaced,
  81                          bool native)
  82     : size(size),
  83       refresh_rate(refresh_rate),
  84       interlaced(interlaced),
  85       native(native),
  86       ui_scale(1.0f),
  87       device_scale_factor(1.0f) {}
  88
  89 gfx::Size DisplayMode::GetSizeInDIP(bool is_internal) const {
  90   gfx::SizeF size_dip(size);
  91   size_dip.Scale(ui_scale);
  92   // DSF=1.25 is special on internal display. The screen is drawn with DSF=1.25
  93   // but it doesn't affect the screen size computation.
  94   if (use_125_dsf_for_ui_scaling && is_internal && device_scale_factor == 1.25f)
  95     return gfx::ToFlooredSize(size_dip);
  96   size_dip.Scale(1.0f / device_scale_factor);
  97   return gfx::ToFlooredSize(size_dip);
  98 }
  99
 100 bool DisplayMode::IsEquivalent(const DisplayMode& other) const {
 101   const float kEpsilon = 0.0001f;
 102   return size == other.size &&
 103       std::abs(ui_scale - other.ui_scale) < kEpsilon &&
 104       std::abs(device_scale_factor - other.device_scale_factor) < kEpsilon;
 105 }
 106
 107 // satic
 108 DisplayInfo DisplayInfo::CreateFromSpec(const std::string& spec) {
 109   return CreateFromSpecWithID(spec, gfx::Display::kInvalidDisplayID);
 110 }
 111
 112 // static
 113 DisplayInfo DisplayInfo::CreateFromSpecWithID(const std::string& spec,
 114                                               int64 id) {
 115 #if defined(OS_WIN)
 116   gfx::Rect bounds_in_native(aura::WindowTreeHost::GetNativeScreenSize());
 117 #else
 118   // Default bounds for a display.
 119   const int kDefaultHostWindowX = 200;
 120   const int kDefaultHostWindowY = 200;
 121   const int kDefaultHostWindowWidth = 1366;
 122   const int kDefaultHostWindowHeight = 768;
 123   gfx::Rect bounds_in_native(kDefaultHostWindowX, kDefaultHostWindowY,
 124                              kDefaultHostWindowWidth, kDefaultHostWindowHeight);
 125 #endif
 126   std::string main_spec = spec;
 127
 128   float ui_scale = 1.0f;
 129   std::vector<std::string> parts = base::SplitString(
 130       main_spec, "@", base::KEEP_WHITESPACE, base::SPLIT_WANT_NONEMPTY);
 131   if (parts.size() == 2) {
 132     double scale_in_double = 0;
 133     if (base::StringToDouble(parts[1], &scale_in_double))
 134       ui_scale = scale_in_double;
 135     main_spec = parts[0];
 136   }
 137
 138   parts = base::SplitString(main_spec, "/", base::KEEP_WHITESPACE,
 139                             base::SPLIT_WANT_NONEMPTY);
 140   gfx::Display::Rotation rotation(gfx::Display::ROTATE_0);
 141   bool has_overscan = false;
 142   if (!parts.empty()) {
 143     main_spec = parts[0];
 144     if (parts.size() >= 2) {
 145       std::string options = parts[1];
 146       for (size_t i = 0; i < options.size(); ++i) {
 147         char c = options[i];
 148         switch (c) {
 149           case 'o':
 150             has_overscan = true;
 151             break;
 152           case 'r':  // rotate 90 degrees to 'right'.
 153             rotation = gfx::Display::ROTATE_90;
 154             break;
 155           case 'u':  // 180 degrees, 'u'pside-down.
 156             rotation = gfx::Display::ROTATE_180;
 157             break;
 158           case 'l':  // rotate 90 degrees to 'left'.
 159             rotation = gfx::Display::ROTATE_270;
 160             break;
 161         }
 162       }
 163     }
 164   }
 165
 166   float device_scale_factor = 1.0f;
 167   if (!GetDisplayBounds(main_spec, &bounds_in_native, &device_scale_factor)) {
 168 #if defined(OS_WIN)
 169     device_scale_factor = gfx::GetDPIScale();
 170 #endif
 171   }
 172
 173   std::vector<DisplayMode> display_modes;
 174   parts = base::SplitString(main_spec, "#", base::KEEP_WHITESPACE,
 175                             base::SPLIT_WANT_NONEMPTY);
 176   if (parts.size() == 2) {
 177     size_t native_mode = 0;
 178     int largest_area = -1;
 179     float highest_refresh_rate = -1.0f;
 180     main_spec = parts[0];
 181     std::string resolution_list = parts[1];
 182     parts = base::SplitString(resolution_list, "|", base::KEEP_WHITESPACE,
 183                               base::SPLIT_WANT_NONEMPTY);
 184     for (size_t i = 0; i < parts.size(); ++i) {
 185       DisplayMode mode;
 186       gfx::Rect mode_bounds;
 187       std::vector<std::string> resolution = base::SplitString(
 188           parts[i], "%", base::KEEP_WHITESPACE, base::SPLIT_WANT_NONEMPTY);
 189       if (GetDisplayBounds(
 190               resolution[0], &mode_bounds, &mode.device_scale_factor)) {
 191         mode.size = mode_bounds.size();
 192         if (resolution.size() > 1)
 193           sscanf(resolution[1].c_str(), "%f", &mode.refresh_rate);
 194         if (mode.size.GetArea() >= largest_area &&
 195             mode.refresh_rate > highest_refresh_rate) {
 196           // Use mode with largest area and highest refresh rate as native.
 197           largest_area = mode.size.GetArea();
 198           highest_refresh_rate = mode.refresh_rate;
 199           native_mode = i;
 200         }
 201         display_modes.push_back(mode);
 202       }
 203     }
 204     display_modes[native_mode].native = true;
 205   }
 206
 207   if (id == gfx::Display::kInvalidDisplayID)
 208     id = synthesized_display_id++;
 209   DisplayInfo display_info(
 210       id, base::StringPrintf("Display-%d", static_cast<int>(id)), has_overscan);
 211   display_info.set_device_scale_factor(device_scale_factor);
 212   display_info.SetRotation(rotation, gfx::Display::ROTATION_SOURCE_ACTIVE);
 213   display_info.set_configured_ui_scale(ui_scale);
 214   display_info.SetBounds(bounds_in_native);
 215   display_info.SetDisplayModes(display_modes);
 216
 217   // To test the overscan, it creates the default 5% overscan.
 218   if (has_overscan) {
 219     int width = bounds_in_native.width() / device_scale_factor / 40;
 220     int height = bounds_in_native.height() / device_scale_factor / 40;
 221     display_info.SetOverscanInsets(gfx::Insets(height, width, height, width));
 222     display_info.UpdateDisplaySize();
 223   }
 224
 225   DVLOG(1) << "DisplayInfoFromSpec info=" << display_info.ToString()
 226            << ", spec=" << spec;
 227   return display_info;
 228 }
 229
 230 // static
 231 void DisplayInfo::SetUse125DSFForUIScalingForTest(bool enable) {
 232   use_125_dsf_for_ui_scaling = enable;
 233 }
 234
 235 DisplayInfo::DisplayInfo()
 236     : id_(gfx::Display::kInvalidDisplayID),
 237       has_overscan_(false),
 238       touch_support_(gfx::Display::TOUCH_SUPPORT_UNKNOWN),
 239       device_scale_factor_(1.0f),
 240       overscan_insets_in_dip_(0, 0, 0, 0),
 241       configured_ui_scale_(1.0f),
 242       native_(false),
 243       is_aspect_preserving_scaling_(false),
 244       clear_overscan_insets_(false),
 245       color_profile_(ui::COLOR_PROFILE_STANDARD) {
 246 }
 247
 248 DisplayInfo::DisplayInfo(int64 id,
 249                          const std::string& name,
 250                          bool has_overscan)
 251     : id_(id),
 252       name_(name),
 253       has_overscan_(has_overscan),
 254       touch_support_(gfx::Display::TOUCH_SUPPORT_UNKNOWN),
 255       device_scale_factor_(1.0f),
 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
 264 DisplayInfo::~DisplayInfo() {
 265 }
 266
 267 void DisplayInfo::SetRotation(gfx::Display::Rotation rotation,
 268                               gfx::Display::RotationSource source) {
 269   rotations_[source] = rotation;
 270   rotations_[gfx::Display::ROTATION_SOURCE_ACTIVE] = rotation;
 271 }
 272
 273 gfx::Display::Rotation DisplayInfo::GetActiveRotation() const {
 274   return GetRotation(gfx::Display::ROTATION_SOURCE_ACTIVE);
 275 }
 276
 277 gfx::Display::Rotation DisplayInfo::GetRotation(
 278     gfx::Display::RotationSource source) const {
 279   if (rotations_.find(source) == rotations_.end())
 280     return gfx::Display::ROTATE_0;
 281   return rotations_.at(source);
 282 }
 283
 284 void DisplayInfo::Copy(const DisplayInfo& native_info) {
 285   DCHECK(id_ == native_info.id_);
 286   name_ = native_info.name_;
 287   has_overscan_ = native_info.has_overscan_;
 288
 289   touch_support_ = native_info.touch_support_;
 290   input_devices_ = native_info.input_devices_;
 291   device_scale_factor_ = native_info.device_scale_factor_;
 292   DCHECK(!native_info.bounds_in_native_.IsEmpty());
 293   bounds_in_native_ = native_info.bounds_in_native_;
 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