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/geometry/size_conversions.h"
  16 #include "ui/gfx/geometry/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 // Display mode list is sorted by:
  47 //  * the area in pixels in ascending order
  48 //  * refresh rate in descending order
  49 struct DisplayModeSorter {
  50   explicit DisplayModeSorter(bool is_internal) : is_internal(is_internal) {}
  51
  52   bool operator()(const DisplayMode& a, const DisplayMode& b) {
  53     gfx::Size size_a_dip = a.GetSizeInDIP(is_internal);
  54     gfx::Size size_b_dip = b.GetSizeInDIP(is_internal);
  55     if (size_a_dip.GetArea() == size_b_dip.GetArea())
  56       return (a.refresh_rate > b.refresh_rate);
  57     return (size_a_dip.GetArea() < size_b_dip.GetArea());
  58   }
  59
  60   bool is_internal;
  61 };
  62
  63 }  // namespace
  64
  65 DisplayMode::DisplayMode()
  66     : refresh_rate(0.0f),
  67       interlaced(false),
  68       native(false),
  69       ui_scale(1.0f),
  70       device_scale_factor(1.0f) {}
  71
  72 DisplayMode::DisplayMode(const gfx::Size& size,
  73                          float refresh_rate,
  74                          bool interlaced,
  75                          bool native)
  76     : size(size),
  77       refresh_rate(refresh_rate),
  78       interlaced(interlaced),
  79       native(native),
  80       ui_scale(1.0f),
  81       device_scale_factor(1.0f) {}
  82
  83 gfx::Size DisplayMode::GetSizeInDIP(bool is_internal) const {
  84   gfx::SizeF size_dip(size);
  85   size_dip.Scale(ui_scale);
  86   // DSF=1.25 is special. The screen is drawn with DSF=1.25 in some mode but it
  87   // doesn't affect the screen size computation.
  88   if (!(use_125_dsf_for_ui_scaling && is_internal) ||
  89       device_scale_factor != 1.25f) {
  90     size_dip.Scale(1.0f / device_scale_factor);
  91   }
  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 void DisplayInfo::SetUse125DSFForUIScaling(bool enable) {
 109   use_125_dsf_for_ui_scaling = enable;
 110 }
 111
 112 // static
 113 DisplayInfo DisplayInfo::CreateFromSpecWithID(const std::string& spec,
 114                                               int64 id) {
 115   // Use larger than max int to catch overflow early.
 116   static int64 synthesized_display_id = 2200000000LL;
 117
 118 #if defined(OS_WIN)
 119   gfx::Rect bounds_in_native(aura::WindowTreeHost::GetNativeScreenSize());
 120 #else
 121   // Default bounds for a display.
 122   const int kDefaultHostWindowX = 200;
 123   const int kDefaultHostWindowY = 200;
 124   const int kDefaultHostWindowWidth = 1366;
 125   const int kDefaultHostWindowHeight = 768;
 126   gfx::Rect bounds_in_native(kDefaultHostWindowX, kDefaultHostWindowY,
 127                              kDefaultHostWindowWidth, kDefaultHostWindowHeight);
 128 #endif
 129   std::string main_spec = spec;
 130
 131   float ui_scale = 1.0f;
 132   std::vector<std::string> parts;
 133   if (Tokenize(main_spec, "@", &parts) == 2) {
 134     double scale_in_double = 0;
 135     if (base::StringToDouble(parts[1], &scale_in_double))
 136       ui_scale = scale_in_double;
 137     main_spec = parts[0];
 138   }
 139
 140   size_t count = Tokenize(main_spec, "/", &parts);
 141   gfx::Display::Rotation rotation(gfx::Display::ROTATE_0);
 142   bool has_overscan = false;
 143   if (count) {
 144     main_spec = parts[0];
 145     if (count >= 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   if (Tokenize(main_spec, "#", &parts) == 2) {
 176     size_t native_mode = 0;
 177     int largest_area = -1;
 178     float highest_refresh_rate = -1.0f;
 179     main_spec = parts[0];
 180     std::string resolution_list = parts[1];
 181     count = Tokenize(resolution_list, "|", &parts);
 182     for (size_t i = 0; i < count; ++i) {
 183       DisplayMode mode;
 184       gfx::Rect mode_bounds;
 185       std::vector<std::string> resolution;
 186       Tokenize(parts[i], "%", &resolution);
 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.set_rotation(rotation);
 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 DisplayInfo::DisplayInfo()
 229     : id_(gfx::Display::kInvalidDisplayID),
 230       has_overscan_(false),
 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       clear_overscan_insets_(false),
 240       color_profile_(ui::COLOR_PROFILE_STANDARD) {
 241 }
 242
 243 DisplayInfo::DisplayInfo(int64 id,
 244                          const std::string& name,
 245                          bool has_overscan)
 246     : id_(id),
 247       name_(name),
 248       has_overscan_(has_overscan),
 249       rotation_(gfx::Display::ROTATE_0),
 250       touch_support_(gfx::Display::TOUCH_SUPPORT_UNKNOWN),
 251       touch_device_id_(0),
 252       device_scale_factor_(1.0f),
 253       overscan_insets_in_dip_(0, 0, 0, 0),
 254       configured_ui_scale_(1.0f),
 255       native_(false),
 256       is_aspect_preserving_scaling_(false),
 257       clear_overscan_insets_(false),
 258       color_profile_(ui::COLOR_PROFILE_STANDARD) {
 259 }
 260
 261 DisplayInfo::~DisplayInfo() {
 262 }
 263
 264 void DisplayInfo::Copy(const DisplayInfo& native_info) {
 265   DCHECK(id_ == native_info.id_);
 266   name_ = native_info.name_;
 267   has_overscan_ = native_info.has_overscan_;
 268
 269   DCHECK(!native_info.bounds_in_native_.IsEmpty());
 270   bounds_in_native_ = native_info.bounds_in_native_;
 271   size_in_pixel_ = native_info.size_in_pixel_;
 272   device_scale_factor_ = native_info.device_scale_factor_;
 273   display_modes_ = native_info.display_modes_;
 274   touch_support_ = native_info.touch_support_;
 275   touch_device_id_ = native_info.touch_device_id_;
 276
 277   // Rotation, ui_scale, color_profile and overscan are given by preference,
 278   // or unit tests. Don't copy if this native_info came from
 279   // DisplayChangeObserver.
 280   if (!native_info.native()) {
 281     // Update the overscan_insets_in_dip_ either if the inset should be
 282     // cleared, or has non empty insts.
 283     if (native_info.clear_overscan_insets())
 284       overscan_insets_in_dip_.Set(0, 0, 0, 0);
 285     else if (!native_info.overscan_insets_in_dip_.empty())
 286       overscan_insets_in_dip_ = native_info.overscan_insets_in_dip_;
 287
 288     rotation_ = native_info.rotation_;
 289     configured_ui_scale_ = native_info.configured_ui_scale_;
 290     color_profile_ = native_info.color_profile();
 291   }
 292
 293   available_color_profiles_ = native_info.available_color_profiles();
 294
 295   // Don't copy insets as it may be given by preference.  |rotation_|
 296   // is treated as a native so that it can be specified in
 297   // |CreateFromSpec|.
 298 }
 299
 300 void DisplayInfo::SetBounds(const gfx::Rect& new_bounds_in_native) {
 301   bounds_in_native_ = new_bounds_in_native;
 302   size_in_pixel_ = new_bounds_in_native.size();
 303   UpdateDisplaySize();
 304 }
 305
 306 float DisplayInfo::GetEffectiveDeviceScaleFactor() const {
 307   if (Use125DSFRorUIScaling() && device_scale_factor_ == 1.25f)
 308     return (configured_ui_scale_ == 0.8f) ? 1.25f : 1.0f;
 309   if (device_scale_factor_ == configured_ui_scale_)
 310     return 1.0f;
 311   return device_scale_factor_;
 312 }
 313
 314 float DisplayInfo::GetEffectiveUIScale() const {
 315   if (Use125DSFRorUIScaling() && device_scale_factor_ == 1.25f)
 316     return (configured_ui_scale_ == 0.8f) ? 1.0f : configured_ui_scale_;
 317   if (device_scale_factor_ == configured_ui_scale_)
 318     return 1.0f;
 319   return configured_ui_scale_;
 320 }
 321
 322 void DisplayInfo::UpdateDisplaySize() {
 323   size_in_pixel_ = bounds_in_native_.size();
 324   if (!overscan_insets_in_dip_.empty()) {
 325     gfx::Insets insets_in_pixel =
 326         overscan_insets_in_dip_.Scale(device_scale_factor_);
 327     size_in_pixel_.Enlarge(-insets_in_pixel.width(), -insets_in_pixel.height());
 328   } else {
 329     overscan_insets_in_dip_.Set(0, 0, 0, 0);
 330   }
 331
 332   if (rotation_ == gfx::Display::ROTATE_90 ||
 333       rotation_ == gfx::Display::ROTATE_270)
 334     size_in_pixel_.SetSize(size_in_pixel_.height(), size_in_pixel_.width());
 335   gfx::SizeF size_f(size_in_pixel_);
 336   size_f.Scale(GetEffectiveUIScale());
 337   size_in_pixel_ = gfx::ToFlooredSize(size_f);
 338 }
 339
 340 void DisplayInfo::SetOverscanInsets(const gfx::Insets& insets_in_dip) {
 341   overscan_insets_in_dip_ = insets_in_dip;
 342 }
 343
 344 gfx::Insets DisplayInfo::GetOverscanInsetsInPixel() const {
 345   return overscan_insets_in_dip_.Scale(device_scale_factor_);
 346 }
 347
 348 void DisplayInfo::SetDisplayModes(
 349     const std::vector<DisplayMode>& display_modes) {
 350   display_modes_ = display_modes;
 351   std::sort(display_modes_.begin(), display_modes_.end(),
 352             DisplayModeSorter(id_ == gfx::Display::InternalDisplayId()));
 353 }
 354
 355 gfx::Size DisplayInfo::GetNativeModeSize() const {
 356   for (size_t i = 0; i < display_modes_.size(); ++i) {
 357     if (display_modes_[i].native)
 358       return display_modes_[i].size;
 359   }
 360
 361   return gfx::Size();
 362 }
 363
 364 std::string DisplayInfo::ToString() const {
 365   int rotation_degree = static_cast<int>(rotation_) * 90;
 366   return base::StringPrintf(
 367       "DisplayInfo[%lld] native bounds=%s, size=%s, scale=%f, "
 368       "overscan=%s, rotation=%d, ui-scale=%f, touchscreen=%s, "
 369       "touch-device-id=%d",
 370       static_cast<long long int>(id_),
 371       bounds_in_native_.ToString().c_str(),
 372       size_in_pixel_.ToString().c_str(),
 373       device_scale_factor_,
 374       overscan_insets_in_dip_.ToString().c_str(),
 375       rotation_degree,
 376       configured_ui_scale_,
 377       touch_support_ == gfx::Display::TOUCH_SUPPORT_AVAILABLE
 378           ? "yes"
 379           : touch_support_ == gfx::Display::TOUCH_SUPPORT_UNAVAILABLE
 380                 ? "no"
 381                 : "unknown",
 382       touch_device_id_);
 383 }
 384
 385 std::string DisplayInfo::ToFullString() const {
 386   std::string display_modes_str;
 387   std::vector<DisplayMode>::const_iterator iter = display_modes_.begin();
 388   for (; iter != display_modes_.end(); ++iter) {
 389     if (!display_modes_str.empty())
 390       display_modes_str += ",";
 391     base::StringAppendF(&display_modes_str,
 392                         "(%dx%d@%f%c%s)",
 393                         iter->size.width(),
 394                         iter->size.height(),
 395                         iter->refresh_rate,
 396                         iter->interlaced ? 'I' : 'P',
 397                         iter->native ? "(N)" : "");
 398   }
 399   return ToString() + ", display_modes==" + display_modes_str;
 400 }
 401
 402 void DisplayInfo::SetColorProfile(ui::ColorCalibrationProfile profile) {
 403   if (IsColorProfileAvailable(profile))
 404     color_profile_ = profile;
 405 }
 406
 407 bool DisplayInfo::IsColorProfileAvailable(
 408     ui::ColorCalibrationProfile profile) const {
 409   return std::find(available_color_profiles_.begin(),
 410                    available_color_profiles_.end(),
 411                    profile) != available_color_profiles_.end();
 412 }
 413
 414 bool DisplayInfo::Use125DSFRorUIScaling() const {
 415   return use_125_dsf_for_ui_scaling && id_ == gfx::Display::InternalDisplayId();
 416 }
 417
 418 }  // namespace ash