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_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
  23 namespace ash {
  24 namespace {
  25
  26 bool 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.
  30 bool 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
  48 DisplayMode::DisplayMode()
  49     : refresh_rate(0.0f),
  50       interlaced(false),
  51       native(false),
  52       ui_scale(1.0f),
  53       device_scale_factor(1.0f) {}
  54
  55 DisplayMode::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
  66 gfx::Size DisplayMode::GetSizeInDIP(bool is_internal) 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 && is_internal) ||
  72       device_scale_factor != 1.25f) {
  73     size_dip.Scale(1.0f / device_scale_factor);
  74   }
  75   return gfx::ToFlooredSize(size_dip);
  76 }
  77
  78 bool DisplayMode::IsEquivalent(const DisplayMode& other) const {
  79   const float kEpsilon = 0.0001f;
  80   return size == other.size &&
  81       std::abs(ui_scale - other.ui_scale) < kEpsilon &&
  82       std::abs(device_scale_factor - other.device_scale_factor) < kEpsilon;
  83 }
  84
  85 // satic
  86 DisplayInfo DisplayInfo::CreateFromSpec(const std::string& spec) {
  87   return CreateFromSpecWithID(spec, gfx::Display::kInvalidDisplayID);
  88 }
  89
  90 // static
  91 void DisplayInfo::SetUse125DSFForUIScaling(bool enable) {
  92   use_125_dsf_for_ui_scaling = enable;
  93 }
  94
  95 // static
  96 DisplayInfo DisplayInfo::CreateFromSpecWithID(const std::string& spec,
  97                                               int64 id) {
  98   // Use larger than max int to catch overflow early.
  99   static int64 synthesized_display_id = 2200000000LL;
 100
 101 #if defined(OS_WIN)
 102   gfx::Rect bounds_in_native(aura::WindowTreeHost::GetNativeScreenSize());
 103 #else
 104   // Default bounds for a display.
 105   const int kDefaultHostWindowX = 200;
 106   const int kDefaultHostWindowY = 200;
 107   const int kDefaultHostWindowWidth = 1366;
 108   const int kDefaultHostWindowHeight = 768;
 109   gfx::Rect bounds_in_native(kDefaultHostWindowX, kDefaultHostWindowY,
 110                              kDefaultHostWindowWidth, kDefaultHostWindowHeight);
 111 #endif
 112   std::string main_spec = spec;
 113
 114   float ui_scale = 1.0f;
 115   std::vector<std::string> parts;
 116   if (Tokenize(main_spec, "@", &parts) == 2) {
 117     double scale_in_double = 0;
 118     if (base::StringToDouble(parts[1], &scale_in_double))
 119       ui_scale = scale_in_double;
 120     main_spec = parts[0];
 121   }
 122
 123   size_t count = Tokenize(main_spec, "/", &parts);
 124   gfx::Display::Rotation rotation(gfx::Display::ROTATE_0);
 125   bool has_overscan = false;
 126   if (count) {
 127     main_spec = parts[0];
 128     if (count >= 2) {
 129       std::string options = parts[1];
 130       for (size_t i = 0; i < options.size(); ++i) {
 131         char c = options[i];
 132         switch (c) {
 133           case 'o':
 134             has_overscan = true;
 135             break;
 136           case 'r':  // rotate 90 degrees to 'right'.
 137             rotation = gfx::Display::ROTATE_90;
 138             break;
 139           case 'u':  // 180 degrees, 'u'pside-down.
 140             rotation = gfx::Display::ROTATE_180;
 141             break;
 142           case 'l':  // rotate 90 degrees to 'left'.
 143             rotation = gfx::Display::ROTATE_270;
 144             break;
 145         }
 146       }
 147     }
 148   }
 149
 150   float device_scale_factor = 1.0f;
 151   if (!GetDisplayBounds(main_spec, &bounds_in_native, &device_scale_factor)) {
 152 #if defined(OS_WIN)
 153     device_scale_factor = gfx::GetDPIScale();
 154 #endif
 155   }
 156
 157   std::vector<DisplayMode> display_modes;
 158   if (Tokenize(main_spec, "#", &parts) == 2) {
 159     size_t native_mode = 0;
 160     int largest_area = -1;
 161     float highest_refresh_rate = -1.0f;
 162     main_spec = parts[0];
 163     std::string resolution_list = parts[1];
 164     count = Tokenize(resolution_list, "|", &parts);
 165     for (size_t i = 0; i < count; ++i) {
 166       DisplayMode mode;
 167       gfx::Rect mode_bounds;
 168       std::vector<std::string> resolution;
 169       Tokenize(parts[i], "%", &resolution);
 170       if (GetDisplayBounds(
 171               resolution[0], &mode_bounds, &mode.device_scale_factor)) {
 172         mode.size = mode_bounds.size();
 173         if (resolution.size() > 1)
 174           sscanf(resolution[1].c_str(), "%f", &mode.refresh_rate);
 175         if (mode.size.GetArea() >= largest_area &&
 176             mode.refresh_rate > highest_refresh_rate) {
 177           // Use mode with largest area and highest refresh rate as native.
 178           largest_area = mode.size.GetArea();
 179           highest_refresh_rate = mode.refresh_rate;
 180           native_mode = i;
 181         }
 182         display_modes.push_back(mode);
 183       }
 184     }
 185     display_modes[native_mode].native = true;
 186   }
 187
 188   if (id == gfx::Display::kInvalidDisplayID)
 189     id = synthesized_display_id++;
 190   DisplayInfo display_info(
 191       id, base::StringPrintf("Display-%d", static_cast<int>(id)), has_overscan);
 192   display_info.set_device_scale_factor(device_scale_factor);
 193   display_info.set_rotation(rotation);
 194   display_info.set_configured_ui_scale(ui_scale);
 195   display_info.SetBounds(bounds_in_native);
 196   display_info.set_display_modes(display_modes);
 197
 198   // To test the overscan, it creates the default 5% overscan.
 199   if (has_overscan) {
 200     int width = bounds_in_native.width() / device_scale_factor / 40;
 201     int height = bounds_in_native.height() / device_scale_factor / 40;
 202     display_info.SetOverscanInsets(gfx::Insets(height, width, height, width));
 203     display_info.UpdateDisplaySize();
 204   }
 205
 206   DVLOG(1) << "DisplayInfoFromSpec info=" << display_info.ToString()
 207            << ", spec=" << spec;
 208   return display_info;
 209 }
 210
 211 DisplayInfo::DisplayInfo()
 212     : id_(gfx::Display::kInvalidDisplayID),
 213       has_overscan_(false),
 214       rotation_(gfx::Display::ROTATE_0),
 215       touch_support_(gfx::Display::TOUCH_SUPPORT_UNKNOWN),
 216       touch_device_id_(0),
 217       device_scale_factor_(1.0f),
 218       overscan_insets_in_dip_(0, 0, 0, 0),
 219       configured_ui_scale_(1.0f),
 220       native_(false),
 221       is_aspect_preserving_scaling_(false),
 222       color_profile_(ui::COLOR_PROFILE_STANDARD) {
 223 }
 224
 225 DisplayInfo::DisplayInfo(int64 id,
 226                          const std::string& name,
 227                          bool has_overscan)
 228     : id_(id),
 229       name_(name),
 230       has_overscan_(has_overscan),
 231       rotation_(gfx::Display::ROTATE_0),
 232       touch_support_(gfx::Display::TOUCH_SUPPORT_UNKNOWN),
 233       touch_device_id_(0),
 234       device_scale_factor_(1.0f),
 235       overscan_insets_in_dip_(0, 0, 0, 0),
 236       configured_ui_scale_(1.0f),
 237       native_(false),
 238       is_aspect_preserving_scaling_(false),
 239       color_profile_(ui::COLOR_PROFILE_STANDARD) {
 240 }
 241
 242 DisplayInfo::~DisplayInfo() {
 243 }
 244
 245 void 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
 281 void 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
 287 float DisplayInfo::GetEffectiveDeviceScaleFactor() const {
 288   if (Use125DSFRorUIScaling() && 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
 295 float DisplayInfo::GetEffectiveUIScale() const {
 296   if (Use125DSFRorUIScaling() && 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
 303 void 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
 321 void DisplayInfo::SetOverscanInsets(const gfx::Insets& insets_in_dip) {
 322   overscan_insets_in_dip_ = insets_in_dip;
 323 }
 324
 325 gfx::Insets DisplayInfo::GetOverscanInsetsInPixel() const {
 326   return overscan_insets_in_dip_.Scale(device_scale_factor_);
 327 }
 328
 329 gfx::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
 338 std::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
 359 std::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
 376 void DisplayInfo::SetColorProfile(ui::ColorCalibrationProfile profile) {
 377   if (IsColorProfileAvailable(profile))
 378     color_profile_ = profile;
 379 }
 380
 381 bool 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 bool DisplayInfo::Use125DSFRorUIScaling() const {
 389   return use_125_dsf_for_ui_scaling && id_ == gfx::Display::InternalDisplayId();
 390 }
 391
 392 }  // namespace ash