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  26 // TODO(oshima): This feature is obsolete. Remove this after m38.
  27 bool allow_upgrade_to_high_dpi = 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 }
  48
  49 DisplayMode::DisplayMode()
  50     : refresh_rate(0.0f),
  51       interlaced(false),
  52       native(false),
  53       ui_scale(1.0f),
  54       device_scale_factor(1.0f) {}
  55
  56 DisplayMode::DisplayMode(const gfx::Size& size,
  57                          float refresh_rate,
  58                          bool interlaced,
  59                          bool native)
  60     : size(size),
  61       refresh_rate(refresh_rate),
  62       interlaced(interlaced),
  63       native(native),
  64       ui_scale(1.0f),
  65       device_scale_factor(1.0f) {}
  66
  67 gfx::Size DisplayMode::GetSizeInDIP() const {
  68   gfx::SizeF size_dip(size);
  69   size_dip.Scale(ui_scale);
  70   size_dip.Scale(1.0f / device_scale_factor);
  71   return gfx::ToFlooredSize(size_dip);
  72 }
  73
  74 bool DisplayMode::IsEquivalent(const DisplayMode& other) const {
  75   const float kEpsilon = 0.0001f;
  76   return size == other.size &&
  77       std::abs(ui_scale - other.ui_scale) < kEpsilon &&
  78       std::abs(device_scale_factor - other.device_scale_factor) < kEpsilon;
  79 }
  80
  81 // satic
  82 DisplayInfo DisplayInfo::CreateFromSpec(const std::string& spec) {
  83   return CreateFromSpecWithID(spec, gfx::Display::kInvalidDisplayID);
  84 }
  85
  86 // static
  87 void DisplayInfo::SetAllowUpgradeToHighDPI(bool enable) {
  88   allow_upgrade_to_high_dpi = enable;
  89 }
  90
  91 // static
  92 DisplayInfo DisplayInfo::CreateFromSpecWithID(const std::string& spec,
  93                                               int64 id) {
  94   // Default bounds for a display.
  95   const int kDefaultHostWindowX = 200;
  96   const int kDefaultHostWindowY = 200;
  97   const int kDefaultHostWindowWidth = 1366;
  98   const int kDefaultHostWindowHeight = 768;
  99
 100   // Use larger than max int to catch overflow early.
 101   static int64 synthesized_display_id = 2200000000LL;
 102
 103 #if defined(OS_WIN)
 104   gfx::Rect bounds_in_native(aura::WindowTreeHost::GetNativeScreenSize());
 105 #else
 106   gfx::Rect bounds_in_native(kDefaultHostWindowX, kDefaultHostWindowY,
 107                              kDefaultHostWindowWidth, kDefaultHostWindowHeight);
 108 #endif
 109   std::string main_spec = spec;
 110
 111   float ui_scale = 1.0f;
 112   std::vector<std::string> parts;
 113   if (Tokenize(main_spec, "@", &parts) == 2) {
 114     double scale_in_double = 0;
 115     if (base::StringToDouble(parts[1], &scale_in_double))
 116       ui_scale = scale_in_double;
 117     main_spec = parts[0];
 118   }
 119
 120   size_t count = Tokenize(main_spec, "/", &parts);
 121   gfx::Display::Rotation rotation(gfx::Display::ROTATE_0);
 122   bool has_overscan = false;
 123   if (count) {
 124     main_spec = parts[0];
 125     if (count >= 2) {
 126       std::string options = parts[1];
 127       for (size_t i = 0; i < options.size(); ++i) {
 128         char c = options[i];
 129         switch (c) {
 130           case 'o':
 131             has_overscan = true;
 132             break;
 133           case 'r':  // rotate 90 degrees to 'right'.
 134             rotation = gfx::Display::ROTATE_90;
 135             break;
 136           case 'u':  // 180 degrees, 'u'pside-down.
 137             rotation = gfx::Display::ROTATE_180;
 138             break;
 139           case 'l':  // rotate 90 degrees to 'left'.
 140             rotation = gfx::Display::ROTATE_270;
 141             break;
 142         }
 143       }
 144     }
 145   }
 146
 147   float device_scale_factor = 1.0f;
 148   if (!GetDisplayBounds(main_spec, &bounds_in_native, &device_scale_factor)) {
 149 #if defined(OS_WIN)
 150     if (gfx::IsHighDPIEnabled()) {
 151       device_scale_factor = gfx::GetDPIScale();
 152     }
 153 #endif
 154   }
 155
 156   std::vector<DisplayMode> display_modes;
 157   if (Tokenize(main_spec, "#", &parts) == 2) {
 158     size_t native_mode = 0;
 159     int largest_area = -1;
 160     float highest_refresh_rate = -1.0f;
 161     main_spec = parts[0];
 162     std::string resolution_list = parts[1];
 163     count = Tokenize(resolution_list, "|", &parts);
 164     for (size_t i = 0; i < count; ++i) {
 165       DisplayMode mode;
 166       gfx::Rect mode_bounds;
 167       std::vector<std::string> resolution;
 168       Tokenize(parts[i], "%", &resolution);
 169       if (GetDisplayBounds(
 170               resolution[0], &mode_bounds, &mode.device_scale_factor)) {
 171         mode.size = mode_bounds.size();
 172         if (resolution.size() > 1)
 173           sscanf(resolution[1].c_str(), "%f", &mode.refresh_rate);
 174         if (mode.size.GetArea() >= largest_area &&
 175             mode.refresh_rate > highest_refresh_rate) {
 176           // Use mode with largest area and highest refresh rate as native.
 177           largest_area = mode.size.GetArea();
 178           highest_refresh_rate = mode.refresh_rate;
 179           native_mode = i;
 180         }
 181         display_modes.push_back(mode);
 182       }
 183     }
 184     display_modes[native_mode].native = true;
 185   }
 186
 187   if (id == gfx::Display::kInvalidDisplayID)
 188     id = synthesized_display_id++;
 189   DisplayInfo display_info(
 190       id, base::StringPrintf("Display-%d", static_cast<int>(id)), has_overscan);
 191   display_info.set_device_scale_factor(device_scale_factor);
 192   display_info.set_rotation(rotation);
 193   display_info.set_configured_ui_scale(ui_scale);
 194   display_info.SetBounds(bounds_in_native);
 195   display_info.set_display_modes(display_modes);
 196
 197   // To test the overscan, it creates the default 5% overscan.
 198   if (has_overscan) {
 199     int width = bounds_in_native.width() / device_scale_factor / 40;
 200     int height = bounds_in_native.height() / device_scale_factor / 40;
 201     display_info.SetOverscanInsets(gfx::Insets(height, width, height, width));
 202     display_info.UpdateDisplaySize();
 203   }
 204
 205   DVLOG(1) << "DisplayInfoFromSpec info=" << display_info.ToString()
 206            << ", spec=" << spec;
 207   return display_info;
 208 }
 209
 210 DisplayInfo::DisplayInfo()
 211     : id_(gfx::Display::kInvalidDisplayID),
 212       has_overscan_(false),
 213       rotation_(gfx::Display::ROTATE_0),
 214       touch_support_(gfx::Display::TOUCH_SUPPORT_UNKNOWN),
 215       touch_device_id_(0),
 216       device_scale_factor_(1.0f),
 217       overscan_insets_in_dip_(0, 0, 0, 0),
 218       configured_ui_scale_(1.0f),
 219       native_(false),
 220       is_aspect_preserving_scaling_(false),
 221       color_profile_(ui::COLOR_PROFILE_STANDARD) {
 222 }
 223
 224 DisplayInfo::DisplayInfo(int64 id,
 225                          const std::string& name,
 226                          bool has_overscan)
 227     : id_(id),
 228       name_(name),
 229       has_overscan_(has_overscan),
 230       rotation_(gfx::Display::ROTATE_0),
 231       touch_support_(gfx::Display::TOUCH_SUPPORT_UNKNOWN),
 232       touch_device_id_(0),
 233       device_scale_factor_(1.0f),
 234       overscan_insets_in_dip_(0, 0, 0, 0),
 235       configured_ui_scale_(1.0f),
 236       native_(false),
 237       color_profile_(ui::COLOR_PROFILE_STANDARD) {
 238 }
 239
 240 DisplayInfo::~DisplayInfo() {
 241 }
 242
 243 void DisplayInfo::Copy(const DisplayInfo& native_info) {
 244   DCHECK(id_ == native_info.id_);
 245   name_ = native_info.name_;
 246   has_overscan_ = native_info.has_overscan_;
 247
 248   DCHECK(!native_info.bounds_in_native_.IsEmpty());
 249   bounds_in_native_ = native_info.bounds_in_native_;
 250   size_in_pixel_ = native_info.size_in_pixel_;
 251   device_scale_factor_ = native_info.device_scale_factor_;
 252   display_modes_ = native_info.display_modes_;
 253   touch_support_ = native_info.touch_support_;
 254   touch_device_id_ = native_info.touch_device_id_;
 255
 256   // Copy overscan_insets_in_dip_ if it's not empty. This is for test
 257   // cases which use "/o" annotation which sets the overscan inset
 258   // to native, and that overscan has to be propagated. This does not
 259   // happen on the real environment.
 260   if (!native_info.overscan_insets_in_dip_.empty())
 261     overscan_insets_in_dip_ = native_info.overscan_insets_in_dip_;
 262
 263   // Rotation_ and ui_scale_ color_profile_ are given by preference,
 264   // or unit tests. Don't copy if this native_info came from
 265   // DisplayChangeObserver.
 266   if (!native_info.native()) {
 267     rotation_ = native_info.rotation_;
 268     configured_ui_scale_ = native_info.configured_ui_scale_;
 269     color_profile_ = native_info.color_profile();
 270   }
 271
 272   available_color_profiles_ = native_info.available_color_profiles();
 273
 274   // Don't copy insets as it may be given by preference.  |rotation_|
 275   // is treated as a native so that it can be specified in
 276   // |CreateFromSpec|.
 277 }
 278
 279 void DisplayInfo::SetBounds(const gfx::Rect& new_bounds_in_native) {
 280   bounds_in_native_ = new_bounds_in_native;
 281   size_in_pixel_ = new_bounds_in_native.size();
 282   UpdateDisplaySize();
 283 }
 284
 285 float DisplayInfo::GetEffectiveDeviceScaleFactor() const {
 286   if (allow_upgrade_to_high_dpi && configured_ui_scale_ < 1.0f &&
 287       device_scale_factor_ == 1.0f) {
 288     return 2.0f;
 289   } else if (device_scale_factor_ == configured_ui_scale_) {
 290     return 1.0f;
 291   }
 292   return device_scale_factor_;
 293 }
 294
 295 float DisplayInfo::GetEffectiveUIScale() const {
 296   if (allow_upgrade_to_high_dpi && configured_ui_scale_ < 1.0f &&
 297       device_scale_factor_ == 1.0f) {
 298     return configured_ui_scale_ * 2.0f;
 299   } else if (device_scale_factor_ == configured_ui_scale_) {
 300     return 1.0f;
 301   }
 302   return configured_ui_scale_;
 303 }
 304
 305 void DisplayInfo::UpdateDisplaySize() {
 306   size_in_pixel_ = bounds_in_native_.size();
 307   if (!overscan_insets_in_dip_.empty()) {
 308     gfx::Insets insets_in_pixel =
 309         overscan_insets_in_dip_.Scale(device_scale_factor_);
 310     size_in_pixel_.Enlarge(-insets_in_pixel.width(), -insets_in_pixel.height());
 311   } else {
 312     overscan_insets_in_dip_.Set(0, 0, 0, 0);
 313   }
 314
 315   if (rotation_ == gfx::Display::ROTATE_90 ||
 316       rotation_ == gfx::Display::ROTATE_270)
 317     size_in_pixel_.SetSize(size_in_pixel_.height(), size_in_pixel_.width());
 318   gfx::SizeF size_f(size_in_pixel_);
 319   size_f.Scale(GetEffectiveUIScale());
 320   size_in_pixel_ = gfx::ToFlooredSize(size_f);
 321 }
 322
 323 void DisplayInfo::SetOverscanInsets(const gfx::Insets& insets_in_dip) {
 324   overscan_insets_in_dip_ = insets_in_dip;
 325 }
 326
 327 gfx::Insets DisplayInfo::GetOverscanInsetsInPixel() const {
 328   return overscan_insets_in_dip_.Scale(device_scale_factor_);
 329 }
 330
 331 std::string DisplayInfo::ToString() const {
 332   int rotation_degree = static_cast<int>(rotation_) * 90;
 333   return base::StringPrintf(
 334       "DisplayInfo[%lld] native bounds=%s, size=%s, scale=%f, "
 335       "overscan=%s, rotation=%d, ui-scale=%f, touchscreen=%s, "
 336       "touch-device-id=%d",
 337       static_cast<long long int>(id_),
 338       bounds_in_native_.ToString().c_str(),
 339       size_in_pixel_.ToString().c_str(),
 340       device_scale_factor_,
 341       overscan_insets_in_dip_.ToString().c_str(),
 342       rotation_degree,
 343       configured_ui_scale_,
 344       touch_support_ == gfx::Display::TOUCH_SUPPORT_AVAILABLE
 345           ? "yes"
 346           : touch_support_ == gfx::Display::TOUCH_SUPPORT_UNAVAILABLE
 347                 ? "no"
 348                 : "unknown",
 349       touch_device_id_);
 350 }
 351
 352 std::string DisplayInfo::ToFullString() const {
 353   std::string display_modes_str;
 354   std::vector<DisplayMode>::const_iterator iter = display_modes_.begin();
 355   for (; iter != display_modes_.end(); ++iter) {
 356     if (!display_modes_str.empty())
 357       display_modes_str += ",";
 358     base::StringAppendF(&display_modes_str,
 359                         "(%dx%d@%f%c%s)",
 360                         iter->size.width(),
 361                         iter->size.height(),
 362                         iter->refresh_rate,
 363                         iter->interlaced ? 'I' : 'P',
 364                         iter->native ? "(N)" : "");
 365   }
 366   return ToString() + ", display_modes==" + display_modes_str;
 367 }
 368
 369 void DisplayInfo::SetColorProfile(ui::ColorCalibrationProfile profile) {
 370   if (IsColorProfileAvailable(profile))
 371     color_profile_ = profile;
 372 }
 373
 374 bool DisplayInfo::IsColorProfileAvailable(
 375     ui::ColorCalibrationProfile profile) const {
 376   return std::find(available_color_profiles_.begin(),
 377                    available_color_profiles_.end(),
 378                    profile) != available_color_profiles_.end();
 379 }
 380
 381 }  // namespace ash