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 allow_upgrade_to_high_dpi = false;
  27
  28 }
  29
  30 DisplayMode::DisplayMode()
  31     : refresh_rate(0.0f), interlaced(false), native(false) {}
  32
  33 DisplayMode::DisplayMode(const gfx::Size& size,
  34                          float refresh_rate,
  35                          bool interlaced,
  36                          bool native)
  37     : size(size),
  38       refresh_rate(refresh_rate),
  39       interlaced(interlaced),
  40       native(native) {}
  41
  42 // satic
  43 DisplayInfo DisplayInfo::CreateFromSpec(const std::string& spec) {
  44   return CreateFromSpecWithID(spec, gfx::Display::kInvalidDisplayID);
  45 }
  46
  47 // static
  48 void DisplayInfo::SetAllowUpgradeToHighDPI(bool enable) {
  49   allow_upgrade_to_high_dpi = enable;
  50 }
  51
  52 // static
  53 DisplayInfo DisplayInfo::CreateFromSpecWithID(const std::string& spec,
  54                                               int64 id) {
  55   // Default bounds for a display.
  56   const int kDefaultHostWindowX = 200;
  57   const int kDefaultHostWindowY = 200;
  58   const int kDefaultHostWindowWidth = 1366;
  59   const int kDefaultHostWindowHeight = 768;
  60
  61   // Use larger than max int to catch overflow early.
  62   static int64 synthesized_display_id = 2200000000LL;
  63
  64 #if defined(OS_WIN)
  65   gfx::Rect bounds_in_native(aura::WindowTreeHost::GetNativeScreenSize());
  66 #else
  67   gfx::Rect bounds_in_native(kDefaultHostWindowX, kDefaultHostWindowY,
  68                              kDefaultHostWindowWidth, kDefaultHostWindowHeight);
  69 #endif
  70   std::string main_spec = spec;
  71
  72   float ui_scale = 1.0f;
  73   std::vector<std::string> parts;
  74   if (Tokenize(main_spec, "@", &parts) == 2) {
  75     double scale_in_double = 0;
  76     if (base::StringToDouble(parts[1], &scale_in_double))
  77       ui_scale = scale_in_double;
  78     main_spec = parts[0];
  79   }
  80
  81   size_t count = Tokenize(main_spec, "/", &parts);
  82   gfx::Display::Rotation rotation(gfx::Display::ROTATE_0);
  83   bool has_overscan = false;
  84   if (count) {
  85     main_spec = parts[0];
  86     if (count >= 2) {
  87       std::string options = parts[1];
  88       for (size_t i = 0; i < options.size(); ++i) {
  89         char c = options[i];
  90         switch (c) {
  91           case 'o':
  92             has_overscan = true;
  93             break;
  94           case 'r':  // rotate 90 degrees to 'right'.
  95             rotation = gfx::Display::ROTATE_90;
  96             break;
  97           case 'u':  // 180 degrees, 'u'pside-down.
  98             rotation = gfx::Display::ROTATE_180;
  99             break;
 100           case 'l':  // rotate 90 degrees to 'left'.
 101             rotation = gfx::Display::ROTATE_270;
 102             break;
 103         }
 104       }
 105     }
 106   }
 107
 108   int x = 0, y = 0, width, height;
 109   float device_scale_factor = 1.0f;
 110   if (sscanf(main_spec.c_str(), "%dx%d*%f",
 111              &width, &height, &device_scale_factor) >= 2 ||
 112       sscanf(main_spec.c_str(), "%d+%d-%dx%d*%f", &x, &y, &width, &height,
 113              &device_scale_factor) >= 4) {
 114     bounds_in_native.SetRect(x, y, width, height);
 115   } else {
 116 #if defined(OS_WIN)
 117     if (gfx::IsHighDPIEnabled()) {
 118       device_scale_factor = gfx::GetDPIScale();
 119     }
 120 #endif
 121   }
 122
 123   std::vector<DisplayMode> display_modes;
 124   if (Tokenize(main_spec, "#", &parts) == 2) {
 125     size_t native_mode = 0;
 126     int largest_area = -1;
 127     float highest_refresh_rate = -1.0f;
 128     main_spec = parts[0];
 129     std::string resolution_list = parts[1];
 130     count = Tokenize(resolution_list, "|", &parts);
 131     for (size_t i = 0; i < count; ++i) {
 132       std::string resolution = parts[i];
 133       int width, height;
 134       float refresh_rate = 0.0f;
 135       if (sscanf(resolution.c_str(),
 136                  "%dx%d%%%f",
 137                  &width,
 138                  &height,
 139                  &refresh_rate) >= 2) {
 140         if (width * height >= largest_area &&
 141             refresh_rate > highest_refresh_rate) {
 142           // Use mode with largest area and highest refresh rate as native.
 143           largest_area = width * height;
 144           highest_refresh_rate = refresh_rate;
 145           native_mode = i;
 146         }
 147         display_modes.push_back(
 148             DisplayMode(gfx::Size(width, height), refresh_rate, false, false));
 149       }
 150     }
 151     display_modes[native_mode].native = true;
 152   }
 153
 154   if (id == gfx::Display::kInvalidDisplayID)
 155     id = synthesized_display_id++;
 156   DisplayInfo display_info(
 157       id, base::StringPrintf("Display-%d", static_cast<int>(id)), has_overscan);
 158   display_info.set_device_scale_factor(device_scale_factor);
 159   display_info.set_rotation(rotation);
 160   display_info.set_configured_ui_scale(ui_scale);
 161   display_info.SetBounds(bounds_in_native);
 162   display_info.set_display_modes(display_modes);
 163
 164   // To test the overscan, it creates the default 5% overscan.
 165   if (has_overscan) {
 166     int width = bounds_in_native.width() / device_scale_factor / 40;
 167     int height = bounds_in_native.height() / device_scale_factor / 40;
 168     display_info.SetOverscanInsets(gfx::Insets(height, width, height, width));
 169     display_info.UpdateDisplaySize();
 170   }
 171
 172   DVLOG(1) << "DisplayInfoFromSpec info=" << display_info.ToString()
 173            << ", spec=" << spec;
 174   return display_info;
 175 }
 176
 177 DisplayInfo::DisplayInfo()
 178     : id_(gfx::Display::kInvalidDisplayID),
 179       has_overscan_(false),
 180       rotation_(gfx::Display::ROTATE_0),
 181       touch_support_(gfx::Display::TOUCH_SUPPORT_UNKNOWN),
 182       touch_device_id_(0),
 183       device_scale_factor_(1.0f),
 184       overscan_insets_in_dip_(0, 0, 0, 0),
 185       configured_ui_scale_(1.0f),
 186       native_(false),
 187       is_aspect_preserving_scaling_(false),
 188       color_profile_(ui::COLOR_PROFILE_STANDARD) {
 189 }
 190
 191 DisplayInfo::DisplayInfo(int64 id,
 192                          const std::string& name,
 193                          bool has_overscan)
 194     : id_(id),
 195       name_(name),
 196       has_overscan_(has_overscan),
 197       rotation_(gfx::Display::ROTATE_0),
 198       touch_support_(gfx::Display::TOUCH_SUPPORT_UNKNOWN),
 199       touch_device_id_(0),
 200       device_scale_factor_(1.0f),
 201       overscan_insets_in_dip_(0, 0, 0, 0),
 202       configured_ui_scale_(1.0f),
 203       native_(false),
 204       color_profile_(ui::COLOR_PROFILE_STANDARD) {
 205 }
 206
 207 DisplayInfo::~DisplayInfo() {
 208 }
 209
 210 void DisplayInfo::Copy(const DisplayInfo& native_info) {
 211   DCHECK(id_ == native_info.id_);
 212   name_ = native_info.name_;
 213   has_overscan_ = native_info.has_overscan_;
 214
 215   DCHECK(!native_info.bounds_in_native_.IsEmpty());
 216   bounds_in_native_ = native_info.bounds_in_native_;
 217   size_in_pixel_ = native_info.size_in_pixel_;
 218   device_scale_factor_ = native_info.device_scale_factor_;
 219   display_modes_ = native_info.display_modes_;
 220   touch_support_ = native_info.touch_support_;
 221   touch_device_id_ = native_info.touch_device_id_;
 222
 223   // Copy overscan_insets_in_dip_ if it's not empty. This is for test
 224   // cases which use "/o" annotation which sets the overscan inset
 225   // to native, and that overscan has to be propagated. This does not
 226   // happen on the real environment.
 227   if (!native_info.overscan_insets_in_dip_.empty())
 228     overscan_insets_in_dip_ = native_info.overscan_insets_in_dip_;
 229
 230   // Rotation_ and ui_scale_ color_profile_ are given by preference,
 231   // or unit tests. Don't copy if this native_info came from
 232   // DisplayChangeObserver.
 233   if (!native_info.native()) {
 234     rotation_ = native_info.rotation_;
 235     configured_ui_scale_ = native_info.configured_ui_scale_;
 236     color_profile_ = native_info.color_profile();
 237   }
 238
 239   available_color_profiles_ = native_info.available_color_profiles();
 240
 241   // Don't copy insets as it may be given by preference.  |rotation_|
 242   // is treated as a native so that it can be specified in
 243   // |CreateFromSpec|.
 244 }
 245
 246 void DisplayInfo::SetBounds(const gfx::Rect& new_bounds_in_native) {
 247   bounds_in_native_ = new_bounds_in_native;
 248   size_in_pixel_ = new_bounds_in_native.size();
 249   UpdateDisplaySize();
 250 }
 251
 252 float DisplayInfo::GetEffectiveDeviceScaleFactor() const {
 253   if (allow_upgrade_to_high_dpi && configured_ui_scale_ < 1.0f &&
 254       device_scale_factor_ == 1.0f) {
 255     return 2.0f;
 256   } else if (device_scale_factor_ == 2.0f && configured_ui_scale_ == 2.0f) {
 257     return 1.0f;
 258   }
 259   return device_scale_factor_;
 260 }
 261
 262 float DisplayInfo::GetEffectiveUIScale() const {
 263   if (allow_upgrade_to_high_dpi && configured_ui_scale_ < 1.0f &&
 264       device_scale_factor_ == 1.0f) {
 265     return configured_ui_scale_ * 2.0f;
 266   } else if (device_scale_factor_ == 2.0f && configured_ui_scale_ == 2.0f) {
 267     return 1.0f;
 268   }
 269   return configured_ui_scale_;
 270 }
 271
 272 void DisplayInfo::UpdateDisplaySize() {
 273   size_in_pixel_ = bounds_in_native_.size();
 274   if (!overscan_insets_in_dip_.empty()) {
 275     gfx::Insets insets_in_pixel =
 276         overscan_insets_in_dip_.Scale(device_scale_factor_);
 277     size_in_pixel_.Enlarge(-insets_in_pixel.width(), -insets_in_pixel.height());
 278   } else {
 279     overscan_insets_in_dip_.Set(0, 0, 0, 0);
 280   }
 281
 282   if (rotation_ == gfx::Display::ROTATE_90 ||
 283       rotation_ == gfx::Display::ROTATE_270)
 284     size_in_pixel_.SetSize(size_in_pixel_.height(), size_in_pixel_.width());
 285   gfx::SizeF size_f(size_in_pixel_);
 286   size_f.Scale(GetEffectiveUIScale());
 287   size_in_pixel_ = gfx::ToFlooredSize(size_f);
 288 }
 289
 290 void DisplayInfo::SetOverscanInsets(const gfx::Insets& insets_in_dip) {
 291   overscan_insets_in_dip_ = insets_in_dip;
 292 }
 293
 294 gfx::Insets DisplayInfo::GetOverscanInsetsInPixel() const {
 295   return overscan_insets_in_dip_.Scale(device_scale_factor_);
 296 }
 297
 298 std::string DisplayInfo::ToString() const {
 299   int rotation_degree = static_cast<int>(rotation_) * 90;
 300   return base::StringPrintf(
 301       "DisplayInfo[%lld] native bounds=%s, size=%s, scale=%f, "
 302       "overscan=%s, rotation=%d, ui-scale=%f, touchscreen=%s, "
 303       "touch-device-id=%d",
 304       static_cast<long long int>(id_),
 305       bounds_in_native_.ToString().c_str(),
 306       size_in_pixel_.ToString().c_str(),
 307       device_scale_factor_,
 308       overscan_insets_in_dip_.ToString().c_str(),
 309       rotation_degree,
 310       configured_ui_scale_,
 311       touch_support_ == gfx::Display::TOUCH_SUPPORT_AVAILABLE
 312           ? "yes"
 313           : touch_support_ == gfx::Display::TOUCH_SUPPORT_UNAVAILABLE
 314                 ? "no"
 315                 : "unknown",
 316       touch_device_id_);
 317 }
 318
 319 std::string DisplayInfo::ToFullString() const {
 320   std::string display_modes_str;
 321   std::vector<DisplayMode>::const_iterator iter = display_modes_.begin();
 322   for (; iter != display_modes_.end(); ++iter) {
 323     if (!display_modes_str.empty())
 324       display_modes_str += ",";
 325     base::StringAppendF(&display_modes_str,
 326                         "(%dx%d@%f%c%s)",
 327                         iter->size.width(),
 328                         iter->size.height(),
 329                         iter->refresh_rate,
 330                         iter->interlaced ? 'I' : 'P',
 331                         iter->native ? "(N)" : "");
 332   }
 333   return ToString() + ", display_modes==" + display_modes_str;
 334 }
 335
 336 void DisplayInfo::SetColorProfile(ui::ColorCalibrationProfile profile) {
 337   if (IsColorProfileAvailable(profile))
 338     color_profile_ = profile;
 339 }
 340
 341 bool DisplayInfo::IsColorProfileAvailable(
 342     ui::ColorCalibrationProfile profile) const {
 343   return std::find(available_color_profiles_.begin(),
 344                    available_color_profiles_.end(),
 345                    profile) != available_color_profiles_.end();
 346 }
 347
 348 }  // namespace ash