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 = false;
  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. The screen is drawn with DSF=1.25 in some mode but it
  88   // doesn't affect the screen size computation.
  89   if (!(use_125_dsf_for_ui_scaling && is_internal) ||
  90       device_scale_factor != 1.25f) {
  91     size_dip.Scale(1.0f / device_scale_factor);
  92   }
  93   return gfx::ToFlooredSize(size_dip);
  94 }
  95
  96 bool DisplayMode::IsEquivalent(const DisplayMode& other) const {
  97   const float kEpsilon = 0.0001f;
  98   return size == other.size &&
  99       std::abs(ui_scale - other.ui_scale) < kEpsilon &&
 100       std::abs(device_scale_factor - other.device_scale_factor) < kEpsilon;
 101 }
 102
 103 // satic
 104 DisplayInfo DisplayInfo::CreateFromSpec(const std::string& spec) {
 105   return CreateFromSpecWithID(spec, gfx::Display::kInvalidDisplayID);
 106 }
 107
 108 // static
 109 void DisplayInfo::SetUse125DSFForUIScaling(bool enable) {
 110   use_125_dsf_for_ui_scaling = enable;
 111 }
 112
 113 // static
 114 DisplayInfo DisplayInfo::CreateFromSpecWithID(const std::string& spec,
 115                                               int64 id) {
 116   // Use larger than max int to catch overflow early.
 117   static int64 synthesized_display_id = 2200000000LL;
 118
 119 #if defined(OS_WIN)
 120   gfx::Rect bounds_in_native(aura::WindowTreeHost::GetNativeScreenSize());
 121 #else
 122   // Default bounds for a display.
 123   const int kDefaultHostWindowX = 200;
 124   const int kDefaultHostWindowY = 200;
 125   const int kDefaultHostWindowWidth = 1366;
 126   const int kDefaultHostWindowHeight = 768;
 127   gfx::Rect bounds_in_native(kDefaultHostWindowX, kDefaultHostWindowY,
 128                              kDefaultHostWindowWidth, kDefaultHostWindowHeight);
 129 #endif
 130   std::string main_spec = spec;
 131
 132   float ui_scale = 1.0f;
 133   std::vector<std::string> parts = base::SplitString(
 134       main_spec, "@", base::KEEP_WHITESPACE, base::SPLIT_WANT_NONEMPTY);
 135   if (parts.size() == 2) {
 136     double scale_in_double = 0;
 137     if (base::StringToDouble(parts[1], &scale_in_double))
 138       ui_scale = scale_in_double;
 139     main_spec = parts[0];
 140   }
 141
 142   parts = base::SplitString(main_spec, "/", base::KEEP_WHITESPACE,
 143                             base::SPLIT_WANT_NONEMPTY);
 144   gfx::Display::Rotation rotation(gfx::Display::ROTATE_0);
 145   bool has_overscan = false;
 146   if (!parts.empty()) {
 147     main_spec = parts[0];
 148     if (parts.size() >= 2) {
 149       std::string options = parts[1];
 150       for (size_t i = 0; i < options.size(); ++i) {
 151         char c = options[i];
 152         switch (c) {
 153           case 'o':
 154             has_overscan = true;
 155             break;
 156           case 'r':  // rotate 90 degrees to 'right'.
 157             rotation = gfx::Display::ROTATE_90;
 158             break;
 159           case 'u':  // 180 degrees, 'u'pside-down.
 160             rotation = gfx::Display::ROTATE_180;
 161             break;
 162           case 'l':  // rotate 90 degrees to 'left'.
 163             rotation = gfx::Display::ROTATE_270;
 164             break;
 165         }
 166       }
 167     }
 168   }
 169
 170   float device_scale_factor = 1.0f;
 171   if (!GetDisplayBounds(main_spec, &bounds_in_native, &device_scale_factor)) {
 172 #if defined(OS_WIN)
 173     device_scale_factor = gfx::GetDPIScale();
 174 #endif
 175   }
 176
 177   std::vector<DisplayMode> display_modes;
 178   parts = base::SplitString(main_spec, "#", base::KEEP_WHITESPACE,
 179                             base::SPLIT_WANT_NONEMPTY);
 180   if (parts.size() == 2) {
 181     size_t native_mode = 0;
 182     int largest_area = -1;
 183     float highest_refresh_rate = -1.0f;
 184     main_spec = parts[0];
 185     std::string resolution_list = parts[1];
 186     parts = base::SplitString(resolution_list, "|", base::KEEP_WHITESPACE,
 187                               base::SPLIT_WANT_NONEMPTY);
 188     for (size_t i = 0; i < parts.size(); ++i) {
 189       DisplayMode mode;
 190       gfx::Rect mode_bounds;
 191       std::vector<std::string> resolution = base::SplitString(
 192           parts[i], "%", base::KEEP_WHITESPACE, base::SPLIT_WANT_NONEMPTY);
 193       if (GetDisplayBounds(
 194               resolution[0], &mode_bounds, &mode.device_scale_factor)) {
 195         mode.size = mode_bounds.size();
 196         if (resolution.size() > 1)
 197           sscanf(resolution[1].c_str(), "%f", &mode.refresh_rate);
 198         if (mode.size.GetArea() >= largest_area &&
 199             mode.refresh_rate > highest_refresh_rate) {
 200           // Use mode with largest area and highest refresh rate as native.
 201           largest_area = mode.size.GetArea();
 202           highest_refresh_rate = mode.refresh_rate;
 203           native_mode = i;
 204         }
 205         display_modes.push_back(mode);
 206       }
 207     }
 208     display_modes[native_mode].native = true;
 209   }
 210
 211   if (id == gfx::Display::kInvalidDisplayID)
 212     id = synthesized_display_id++;
 213   DisplayInfo display_info(
 214       id, base::StringPrintf("Display-%d", static_cast<int>(id)), has_overscan);
 215   display_info.set_device_scale_factor(device_scale_factor);
 216   display_info.SetRotation(rotation, gfx::Display::ROTATION_SOURCE_ACTIVE);
 217   display_info.set_configured_ui_scale(ui_scale);
 218   display_info.SetBounds(bounds_in_native);
 219   display_info.SetDisplayModes(display_modes);
 220
 221   // To test the overscan, it creates the default 5% overscan.
 222   if (has_overscan) {
 223     int width = bounds_in_native.width() / device_scale_factor / 40;
 224     int height = bounds_in_native.height() / device_scale_factor / 40;
 225     display_info.SetOverscanInsets(gfx::Insets(height, width, height, width));
 226     display_info.UpdateDisplaySize();
 227   }
 228
 229   DVLOG(1) << "DisplayInfoFromSpec info=" << display_info.ToString()
 230            << ", spec=" << spec;
 231   return display_info;
 232 }
 233
 234 DisplayInfo::DisplayInfo()
 235     : id_(gfx::Display::kInvalidDisplayID),
 236       has_overscan_(false),
 237       touch_support_(gfx::Display::TOUCH_SUPPORT_UNKNOWN),
 238       touch_device_id_(0),
 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       touch_device_id_(0),
 256       device_scale_factor_(1.0f),
 257       overscan_insets_in_dip_(0, 0, 0, 0),
 258       configured_ui_scale_(1.0f),
 259       native_(false),
 260       is_aspect_preserving_scaling_(false),
 261       clear_overscan_insets_(false),
 262       color_profile_(ui::COLOR_PROFILE_STANDARD) {
 263 }
 264
 265 DisplayInfo::~DisplayInfo() {
 266 }
 267
 268 void DisplayInfo::SetRotation(gfx::Display::Rotation rotation,
 269                               gfx::Display::RotationSource source) {
 270   rotations_[source] = rotation;
 271   rotations_[gfx::Display::ROTATION_SOURCE_ACTIVE] = rotation;
 272 }
 273
 274 gfx::Display::Rotation DisplayInfo::GetActiveRotation() const {
 275   return GetRotation(gfx::Display::ROTATION_SOURCE_ACTIVE);
 276 }
 277
 278 gfx::Display::Rotation DisplayInfo::GetRotation(
 279     gfx::Display::RotationSource source) const {
 280   if (rotations_.find(source) == rotations_.end())
 281     return gfx::Display::ROTATE_0;
 282   return rotations_.at(source);
 283 }
 284
 285 void DisplayInfo::Copy(const DisplayInfo& native_info) {
 286   DCHECK(id_ == native_info.id_);
 287   name_ = native_info.name_;
 288   has_overscan_ = native_info.has_overscan_;
 289
 290   touch_support_ = native_info.touch_support_;
 291   touch_device_id_ = native_info.touch_device_id_;
 292   device_scale_factor_ = native_info.device_scale_factor_;
 293   DCHECK(!native_info.bounds_in_native_.IsEmpty());
 294   bounds_in_native_ = native_info.bounds_in_native_;
 295   size_in_pixel_ = native_info.size_in_pixel_;
 296   is_aspect_preserving_scaling_ = native_info.is_aspect_preserving_scaling_;
 297   display_modes_ = native_info.display_modes_;
 298   available_color_profiles_ = native_info.available_color_profiles_;
 299
 300   // Rotation, ui_scale, color_profile and overscan are given by preference,
 301   // or unit tests. Don't copy if this native_info came from
 302   // DisplayChangeObserver.
 303   if (!native_info.native()) {
 304     // Update the overscan_insets_in_dip_ either if the inset should be
 305     // cleared, or has non empty insts.
 306     if (native_info.clear_overscan_insets())
 307       overscan_insets_in_dip_.Set(0, 0, 0, 0);
 308     else if (!native_info.overscan_insets_in_dip_.empty())
 309       overscan_insets_in_dip_ = native_info.overscan_insets_in_dip_;
 310
 311     rotations_ = native_info.rotations_;
 312     configured_ui_scale_ = native_info.configured_ui_scale_;
 313     color_profile_ = native_info.color_profile();
 314   }
 315 }
 316
 317 void DisplayInfo::SetBounds(const gfx::Rect& new_bounds_in_native) {
 318   bounds_in_native_ = new_bounds_in_native;
 319   size_in_pixel_ = new_bounds_in_native.size();
 320   UpdateDisplaySize();
 321 }
 322
 323 float DisplayInfo::GetEffectiveDeviceScaleFactor() const {
 324   if (Use125DSFRorUIScaling() && device_scale_factor_ == 1.25f)
 325     return (configured_ui_scale_ == 0.8f) ? 1.25f : 1.0f;
 326   if (device_scale_factor_ == configured_ui_scale_)
 327     return 1.0f;
 328   return device_scale_factor_;
 329 }
 330
 331 float DisplayInfo::GetEffectiveUIScale() const {
 332   if (Use125DSFRorUIScaling() && device_scale_factor_ == 1.25f)
 333     return (configured_ui_scale_ == 0.8f) ? 1.0f : configured_ui_scale_;
 334   if (device_scale_factor_ == configured_ui_scale_)
 335     return 1.0f;
 336   return configured_ui_scale_;
 337 }
 338
 339 void DisplayInfo::UpdateDisplaySize() {
 340   size_in_pixel_ = bounds_in_native_.size();
 341   if (!overscan_insets_in_dip_.empty()) {
 342     gfx::Insets insets_in_pixel =
 343         overscan_insets_in_dip_.Scale(device_scale_factor_);
 344     size_in_pixel_.Enlarge(-insets_in_pixel.width(), -insets_in_pixel.height());
 345   } else {
 346     overscan_insets_in_dip_.Set(0, 0, 0, 0);
 347   }
 348
 349   if (GetActiveRotation() == gfx::Display::ROTATE_90 ||
 350       GetActiveRotation() == gfx::Display::ROTATE_270) {
 351     size_in_pixel_.SetSize(size_in_pixel_.height(), size_in_pixel_.width());
 352   }
 353   gfx::SizeF size_f(size_in_pixel_);
 354   size_f.Scale(GetEffectiveUIScale());
 355   size_in_pixel_ = gfx::ToFlooredSize(size_f);
 356 }
 357
 358 void DisplayInfo::SetOverscanInsets(const gfx::Insets& insets_in_dip) {
 359   overscan_insets_in_dip_ = insets_in_dip;
 360 }
 361
 362 gfx::Insets DisplayInfo::GetOverscanInsetsInPixel() const {
 363   return overscan_insets_in_dip_.Scale(device_scale_factor_);
 364 }
 365
 366 void DisplayInfo::SetDisplayModes(
 367     const std::vector<DisplayMode>& display_modes) {
 368   display_modes_ = display_modes;
 369   std::sort(display_modes_.begin(), display_modes_.end(),
 370             DisplayModeSorter(id_ == gfx::Display::InternalDisplayId()));
 371 }
 372
 373 gfx::Size DisplayInfo::GetNativeModeSize() const {
 374   for (size_t i = 0; i < display_modes_.size(); ++i) {
 375     if (display_modes_[i].native)
 376       return display_modes_[i].size;
 377   }
 378
 379   return gfx::Size();
 380 }
 381
 382 std::string DisplayInfo::ToString() const {
 383   int rotation_degree = static_cast<int>(GetActiveRotation()) * 90;
 384   return base::StringPrintf(
 385       "DisplayInfo[%lld] native bounds=%s, size=%s, scale=%f, "
 386       "overscan=%s, rotation=%d, ui-scale=%f, touchscreen=%s, "
 387       "touch-device-id=%d",
 388       static_cast<long long int>(id_),
 389       bounds_in_native_.ToString().c_str(),
 390       size_in_pixel_.ToString().c_str(),
 391       device_scale_factor_,
 392       overscan_insets_in_dip_.ToString().c_str(),
 393       rotation_degree,
 394       configured_ui_scale_,
 395       touch_support_ == gfx::Display::TOUCH_SUPPORT_AVAILABLE
 396           ? "yes"
 397           : touch_support_ == gfx::Display::TOUCH_SUPPORT_UNAVAILABLE
 398                 ? "no"
 399                 : "unknown",
 400       touch_device_id_);
 401 }
 402
 403 std::string DisplayInfo::ToFullString() const {
 404   std::string display_modes_str;
 405   std::vector<DisplayMode>::const_iterator iter = display_modes_.begin();
 406   for (; iter != display_modes_.end(); ++iter) {
 407     if (!display_modes_str.empty())
 408       display_modes_str += ",";
 409     base::StringAppendF(&display_modes_str,
 410                         "(%dx%d@%f%c%s)",
 411                         iter->size.width(),
 412                         iter->size.height(),
 413                         iter->refresh_rate,
 414                         iter->interlaced ? 'I' : 'P',
 415                         iter->native ? "(N)" : "");
 416   }
 417   return ToString() + ", display_modes==" + display_modes_str;
 418 }
 419
 420 void DisplayInfo::SetColorProfile(ui::ColorCalibrationProfile profile) {
 421   if (IsColorProfileAvailable(profile))
 422     color_profile_ = profile;
 423 }
 424
 425 bool DisplayInfo::IsColorProfileAvailable(
 426     ui::ColorCalibrationProfile profile) const {
 427   return std::find(available_color_profiles_.begin(),
 428                    available_color_profiles_.end(),
 429                    profile) != available_color_profiles_.end();
 430 }
 431
 432 bool DisplayInfo::Use125DSFRorUIScaling() const {
 433   return use_125_dsf_for_ui_scaling && id_ == gfx::Display::InternalDisplayId();
 434 }
 435
 436 }  // namespace ash