src/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 internal {
  25
  26 DisplayMode::DisplayMode()
  27     : refresh_rate(0.0f), interlaced(false), native(false) {}
  28
  29 DisplayMode::DisplayMode(const gfx::Size& size,
  30                          float refresh_rate,
  31                          bool interlaced,
  32                          bool native)
  33     : size(size),
  34       refresh_rate(refresh_rate),
  35       interlaced(interlaced),
  36       native(native) {}
  37
  38 // satic
  39 DisplayInfo DisplayInfo::CreateFromSpec(const std::string& spec) {
  40   return CreateFromSpecWithID(spec, gfx::Display::kInvalidDisplayID);
  41 }
  42
  43 // static
  44 DisplayInfo DisplayInfo::CreateFromSpecWithID(const std::string& spec,
  45                                               int64 id) {
  46   // Default bounds for a display.
  47   const int kDefaultHostWindowX = 200;
  48   const int kDefaultHostWindowY = 200;
  49   const int kDefaultHostWindowWidth = 1366;
  50   const int kDefaultHostWindowHeight = 768;
  51
  52   // Use larger than max int to catch overflow early.
  53   static int64 synthesized_display_id = 2200000000LL;
  54
  55 #if defined(OS_WIN)
  56   gfx::Rect bounds_in_native(aura::WindowTreeHost::GetNativeScreenSize());
  57 #else
  58   gfx::Rect bounds_in_native(kDefaultHostWindowX, kDefaultHostWindowY,
  59                              kDefaultHostWindowWidth, kDefaultHostWindowHeight);
  60 #endif
  61   std::string main_spec = spec;
  62
  63   float ui_scale = 1.0f;
  64   std::vector<std::string> parts;
  65   if (Tokenize(main_spec, "@", &parts) == 2) {
  66     double scale_in_double = 0;
  67     if (base::StringToDouble(parts[1], &scale_in_double))
  68       ui_scale = scale_in_double;
  69     main_spec = parts[0];
  70   }
  71
  72   size_t count = Tokenize(main_spec, "/", &parts);
  73   gfx::Display::Rotation rotation(gfx::Display::ROTATE_0);
  74   bool has_overscan = false;
  75   if (count) {
  76     main_spec = parts[0];
  77     if (count >= 2) {
  78       std::string options = parts[1];
  79       for (size_t i = 0; i < options.size(); ++i) {
  80         char c = options[i];
  81         switch (c) {
  82           case 'o':
  83             has_overscan = true;
  84             break;
  85           case 'r':  // rotate 90 degrees to 'right'.
  86             rotation = gfx::Display::ROTATE_90;
  87             break;
  88           case 'u':  // 180 degrees, 'u'pside-down.
  89             rotation = gfx::Display::ROTATE_180;
  90             break;
  91           case 'l':  // rotate 90 degrees to 'left'.
  92             rotation = gfx::Display::ROTATE_270;
  93             break;
  94         }
  95       }
  96     }
  97   }
  98
  99   int x = 0, y = 0, width, height;
 100   float device_scale_factor = 1.0f;
 101   if (sscanf(main_spec.c_str(), "%dx%d*%f",
 102              &width, &height, &device_scale_factor) >= 2 ||
 103       sscanf(main_spec.c_str(), "%d+%d-%dx%d*%f", &x, &y, &width, &height,
 104              &device_scale_factor) >= 4) {
 105     bounds_in_native.SetRect(x, y, width, height);
 106   } else {
 107 #if defined(OS_WIN)
 108     if (gfx::IsHighDPIEnabled()) {
 109       device_scale_factor = gfx::GetModernUIScale();
 110     }
 111 #endif
 112   }
 113
 114   std::vector<DisplayMode> display_modes;
 115   if (Tokenize(main_spec, "#", &parts) == 2) {
 116     size_t native_mode = 0;
 117     int largest_area = -1;
 118     float highest_refresh_rate = -1.0f;
 119     main_spec = parts[0];
 120     std::string resolution_list = parts[1];
 121     count = Tokenize(resolution_list, "|", &parts);
 122     for (size_t i = 0; i < count; ++i) {
 123       std::string resolution = parts[i];
 124       int width, height;
 125       float refresh_rate = 0.0f;
 126       if (sscanf(resolution.c_str(),
 127                  "%dx%d%%%f",
 128                  &width,
 129                  &height,
 130                  &refresh_rate) >= 2) {
 131         if (width * height >= largest_area &&
 132             refresh_rate > highest_refresh_rate) {
 133           // Use mode with largest area and highest refresh rate as native.
 134           largest_area = width * height;
 135           highest_refresh_rate = refresh_rate;
 136           native_mode = i;
 137         }
 138         display_modes.push_back(
 139             DisplayMode(gfx::Size(width, height), refresh_rate, false, false));
 140       }
 141     }
 142     display_modes[native_mode].native = true;
 143   }
 144
 145   if (id == gfx::Display::kInvalidDisplayID)
 146     id = synthesized_display_id++;
 147   DisplayInfo display_info(
 148       id, base::StringPrintf("Display-%d", static_cast<int>(id)), has_overscan);
 149   display_info.set_device_scale_factor(device_scale_factor);
 150   display_info.set_rotation(rotation);
 151   display_info.set_configured_ui_scale(ui_scale);
 152   display_info.SetBounds(bounds_in_native);
 153   display_info.set_display_modes(display_modes);
 154
 155   // To test the overscan, it creates the default 5% overscan.
 156   if (has_overscan) {
 157     int width = bounds_in_native.width() / device_scale_factor / 40;
 158     int height = bounds_in_native.height() / device_scale_factor / 40;
 159     display_info.SetOverscanInsets(gfx::Insets(height, width, height, width));
 160     display_info.UpdateDisplaySize();
 161   }
 162
 163   DVLOG(1) << "DisplayInfoFromSpec info=" << display_info.ToString()
 164            << ", spec=" << spec;
 165   return display_info;
 166 }
 167
 168 DisplayInfo::DisplayInfo()
 169     : id_(gfx::Display::kInvalidDisplayID),
 170       has_overscan_(false),
 171       rotation_(gfx::Display::ROTATE_0),
 172       touch_support_(gfx::Display::TOUCH_SUPPORT_UNKNOWN),
 173       device_scale_factor_(1.0f),
 174       overscan_insets_in_dip_(0, 0, 0, 0),
 175       configured_ui_scale_(1.0f),
 176       native_(false) {
 177 }
 178
 179 DisplayInfo::DisplayInfo(int64 id,
 180                          const std::string& name,
 181                          bool has_overscan)
 182     : id_(id),
 183       name_(name),
 184       has_overscan_(has_overscan),
 185       rotation_(gfx::Display::ROTATE_0),
 186       touch_support_(gfx::Display::TOUCH_SUPPORT_UNKNOWN),
 187       device_scale_factor_(1.0f),
 188       overscan_insets_in_dip_(0, 0, 0, 0),
 189       configured_ui_scale_(1.0f),
 190       native_(false) {
 191 }
 192
 193 DisplayInfo::~DisplayInfo() {
 194 }
 195
 196 void DisplayInfo::Copy(const DisplayInfo& native_info) {
 197   DCHECK(id_ == native_info.id_);
 198   name_ = native_info.name_;
 199   has_overscan_ = native_info.has_overscan_;
 200
 201   DCHECK(!native_info.bounds_in_native_.IsEmpty());
 202   bounds_in_native_ = native_info.bounds_in_native_;
 203   size_in_pixel_ = native_info.size_in_pixel_;
 204   device_scale_factor_ = native_info.device_scale_factor_;
 205   display_modes_ = native_info.display_modes_;
 206   touch_support_ = native_info.touch_support_;
 207
 208   // Copy overscan_insets_in_dip_ if it's not empty. This is for test
 209   // cases which use "/o" annotation which sets the overscan inset
 210   // to native, and that overscan has to be propagated. This does not
 211   // happen on the real environment.
 212   if (!native_info.overscan_insets_in_dip_.empty())
 213     overscan_insets_in_dip_ = native_info.overscan_insets_in_dip_;
 214
 215   // Rotation_ and ui_scale_ are given by preference, or unit
 216   // tests. Don't copy if this native_info came from
 217   // DisplayChangeObserver.
 218   if (!native_info.native()) {
 219     rotation_ = native_info.rotation_;
 220     configured_ui_scale_ = native_info.configured_ui_scale_;
 221   }
 222   // Don't copy insets as it may be given by preference.  |rotation_|
 223   // is treated as a native so that it can be specified in
 224   // |CreateFromSpec|.
 225 }
 226
 227 void DisplayInfo::SetBounds(const gfx::Rect& new_bounds_in_native) {
 228   bounds_in_native_ = new_bounds_in_native;
 229   size_in_pixel_ = new_bounds_in_native.size();
 230   UpdateDisplaySize();
 231 }
 232
 233 float DisplayInfo::GetEffectiveUIScale() const {
 234   if (device_scale_factor_ == 2.0f && configured_ui_scale_ == 2.0f)
 235     return 1.0f;
 236   return configured_ui_scale_;
 237 }
 238
 239 void DisplayInfo::UpdateDisplaySize() {
 240   size_in_pixel_ = bounds_in_native_.size();
 241   if (!overscan_insets_in_dip_.empty()) {
 242     gfx::Insets insets_in_pixel =
 243         overscan_insets_in_dip_.Scale(device_scale_factor_);
 244     size_in_pixel_.Enlarge(-insets_in_pixel.width(), -insets_in_pixel.height());
 245   } else {
 246     overscan_insets_in_dip_.Set(0, 0, 0, 0);
 247   }
 248
 249   if (rotation_ == gfx::Display::ROTATE_90 ||
 250       rotation_ == gfx::Display::ROTATE_270)
 251     size_in_pixel_.SetSize(size_in_pixel_.height(), size_in_pixel_.width());
 252   gfx::SizeF size_f(size_in_pixel_);
 253   size_f.Scale(GetEffectiveUIScale());
 254   size_in_pixel_ = gfx::ToFlooredSize(size_f);
 255 }
 256
 257 void DisplayInfo::SetOverscanInsets(const gfx::Insets& insets_in_dip) {
 258   overscan_insets_in_dip_ = insets_in_dip;
 259 }
 260
 261 gfx::Insets DisplayInfo::GetOverscanInsetsInPixel() const {
 262   return overscan_insets_in_dip_.Scale(device_scale_factor_);
 263 }
 264
 265 std::string DisplayInfo::ToString() const {
 266   int rotation_degree = static_cast<int>(rotation_) * 90;
 267   return base::StringPrintf(
 268       "DisplayInfo[%lld] native bounds=%s, size=%s, scale=%f, "
 269       "overscan=%s, rotation=%d, ui-scale=%f, touchscreen=%s",
 270       static_cast<long long int>(id_),
 271       bounds_in_native_.ToString().c_str(),
 272       size_in_pixel_.ToString().c_str(),
 273       device_scale_factor_,
 274       overscan_insets_in_dip_.ToString().c_str(),
 275       rotation_degree,
 276       configured_ui_scale_,
 277       touch_support_ == gfx::Display::TOUCH_SUPPORT_AVAILABLE
 278           ? "yes"
 279           : touch_support_ == gfx::Display::TOUCH_SUPPORT_UNAVAILABLE
 280                 ? "no"
 281                 : "unknown");
 282 }
 283
 284 std::string DisplayInfo::ToFullString() const {
 285   std::string display_modes_str;
 286   std::vector<DisplayMode>::const_iterator iter = display_modes_.begin();
 287   for (; iter != display_modes_.end(); ++iter) {
 288     if (!display_modes_str.empty())
 289       display_modes_str += ",";
 290     base::StringAppendF(&display_modes_str,
 291                         "(%dx%d@%f%c%s)",
 292                         iter->size.width(),
 293                         iter->size.height(),
 294                         iter->refresh_rate,
 295                         iter->interlaced ? 'I' : 'P',
 296                         iter->native ? "(N)" : "");
 297   }
 298   return ToString() + ", display_modes==" + display_modes_str;
 299 }
 300
 301 }  // namespace internal
 302 }  // namespace ash