1 // Copyright 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.
5 #include "ash/display/display_change_observer_chromeos.h"
12 #include "ash/ash_switches.h"
13 #include "ash/display/display_info.h"
14 #include "ash/display/display_layout_store.h"
15 #include "ash/display/display_manager.h"
16 #include "ash/shell.h"
17 #include "base/command_line.h"
18 #include "base/logging.h"
19 #include "chromeos/display/output_util.h"
20 #include "grit/ash_strings.h"
21 #include "ui/base/l10n/l10n_util.h"
22 #include "ui/base/x/x11_util.h"
23 #include "ui/compositor/dip_util.h"
24 #include "ui/gfx/display.h"
29 using chromeos::OutputConfigurator;
33 // The DPI threshold to detect high density screen.
34 // Higher DPI than this will use device_scale_factor=2.
35 const unsigned int kHighDensityDPIThreshold = 170;
38 const float kInchInMm = 25.4f;
40 // Display mode list is sorted by (in descending priority):
41 // * the area in pixels.
43 struct DisplayModeSorter {
44 bool operator()(const DisplayMode& a, const DisplayMode& b) {
45 if (a.size.GetArea() == b.size.GetArea())
46 return (a.refresh_rate > b.refresh_rate);
47 return (a.size.GetArea() > b.size.GetArea());
54 std::vector<DisplayMode> DisplayChangeObserver::GetDisplayModeList(
55 const OutputConfigurator::OutputSnapshot& output) {
56 typedef std::map<std::pair<int, int>, DisplayMode> DisplayModeMap;
57 DisplayModeMap display_mode_map;
59 for (std::map<RRMode, OutputConfigurator::ModeInfo>::const_iterator it =
60 output.mode_infos.begin(); it != output.mode_infos.end(); ++it) {
61 const OutputConfigurator::ModeInfo& mode_info = it->second;
62 const std::pair<int, int> size(mode_info.width, mode_info.height);
63 const DisplayMode display_mode(gfx::Size(mode_info.width, mode_info.height),
64 mode_info.refresh_rate,
66 output.native_mode == it->first);
68 // Add the display mode if it isn't already present and override interlaced
69 // display modes with non-interlaced ones.
70 DisplayModeMap::iterator display_mode_it = display_mode_map.find(size);
71 if (display_mode_it == display_mode_map.end())
72 display_mode_map.insert(std::make_pair(size, display_mode));
73 else if (display_mode_it->second.interlaced && !display_mode.interlaced)
74 display_mode_it->second = display_mode;
77 std::vector<DisplayMode> display_mode_list;
78 for (DisplayModeMap::const_iterator iter = display_mode_map.begin();
79 iter != display_mode_map.end();
81 display_mode_list.push_back(iter->second);
84 display_mode_list.begin(), display_mode_list.end(), DisplayModeSorter());
85 return display_mode_list;
88 DisplayChangeObserver::DisplayChangeObserver() {
89 Shell::GetInstance()->AddShellObserver(this);
92 DisplayChangeObserver::~DisplayChangeObserver() {
93 Shell::GetInstance()->RemoveShellObserver(this);
96 ui::OutputState DisplayChangeObserver::GetStateForDisplayIds(
97 const std::vector<int64>& display_ids) const {
98 if (CommandLine::ForCurrentProcess()->HasSwitch(
99 switches::kAshForceMirrorMode)) {
100 return ui::OUTPUT_STATE_DUAL_MIRROR;
103 CHECK_EQ(2U, display_ids.size());
104 DisplayIdPair pair = std::make_pair(display_ids[0], display_ids[1]);
105 DisplayLayout layout = Shell::GetInstance()->display_manager()->
106 layout_store()->GetRegisteredDisplayLayout(pair);
107 return layout.mirrored ? ui::OUTPUT_STATE_DUAL_MIRROR :
108 ui::OUTPUT_STATE_DUAL_EXTENDED;
111 bool DisplayChangeObserver::GetResolutionForDisplayId(int64 display_id,
115 if (!Shell::GetInstance()->display_manager()->GetSelectedModeForDisplayId(
119 *width = mode.size.width();
120 *height = mode.size.height();
124 void DisplayChangeObserver::OnDisplayModeChanged(
125 const std::vector<OutputConfigurator::OutputSnapshot>& outputs) {
126 std::vector<DisplayInfo> displays;
128 for (size_t i = 0; i < outputs.size(); ++i) {
129 const OutputConfigurator::OutputSnapshot& output = outputs[i];
131 if (output.type == ui::OUTPUT_TYPE_INTERNAL &&
132 gfx::Display::InternalDisplayId() == gfx::Display::kInvalidDisplayID) {
133 // Fall back to output index. crbug.com/180100
134 gfx::Display::SetInternalDisplayId(
135 output.display_id == gfx::Display::kInvalidDisplayID ? output.index :
139 const OutputConfigurator::ModeInfo* mode_info =
140 OutputConfigurator::GetModeInfo(output, output.current_mode);
144 float device_scale_factor = 1.0f;
145 if (!ui::IsXDisplaySizeBlackListed(output.width_mm, output.height_mm) &&
146 (kInchInMm * mode_info->width / output.width_mm) >
147 kHighDensityDPIThreshold) {
148 device_scale_factor = 2.0f;
150 gfx::Rect display_bounds(
151 output.x, output.y, mode_info->width, mode_info->height);
153 std::vector<DisplayMode> display_modes = GetDisplayModeList(output);
156 output.type == ui::OUTPUT_TYPE_INTERNAL
157 ? l10n_util::GetStringUTF8(IDS_ASH_INTERNAL_DISPLAY_NAME)
158 : chromeos::GetDisplayName(output.output);
160 name = l10n_util::GetStringUTF8(IDS_ASH_STATUS_TRAY_UNKNOWN_DISPLAY_NAME);
162 bool has_overscan = false;
163 chromeos::GetOutputOverscanFlag(output.output, &has_overscan);
165 int64 id = output.display_id;
166 if (id == gfx::Display::kInvalidDisplayID || ids.find(id) != ids.end())
170 displays.push_back(DisplayInfo(id, name, has_overscan));
171 displays.back().set_device_scale_factor(device_scale_factor);
172 displays.back().SetBounds(display_bounds);
173 displays.back().set_native(true);
174 displays.back().set_display_modes(display_modes);
175 displays.back().set_touch_support(
176 output.touch_device_id == 0 ? gfx::Display::TOUCH_SUPPORT_UNAVAILABLE :
177 gfx::Display::TOUCH_SUPPORT_AVAILABLE);
180 // DisplayManager can be null during the boot.
181 Shell::GetInstance()->display_manager()->OnNativeDisplaysChanged(displays);
184 void DisplayChangeObserver::OnAppTerminating() {
186 // Stop handling display configuration events once the shutdown
187 // process starts. crbug.com/177014.
188 Shell::GetInstance()->output_configurator()->Stop();
192 } // namespace internal