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// Copyright 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ash/display/display_change_observer_chromeos.h"
#include <algorithm>
#include <map>
#include <set>
#include <vector>
#include "ash/ash_switches.h"
#include "ash/display/display_info.h"
#include "ash/display/display_layout_store.h"
#include "ash/display/display_manager.h"
#include "ash/shell.h"
#include "base/command_line.h"
#include "base/logging.h"
#include "grit/ash_strings.h"
#include "ui/base/l10n/l10n_util.h"
#include "ui/base/x/x11_util.h"
#include "ui/compositor/dip_util.h"
#include "ui/display/chromeos/display_mode.h"
#include "ui/display/chromeos/display_snapshot.h"
#include "ui/gfx/display.h"
namespace ash {
namespace internal {
using ui::OutputConfigurator;
namespace {
// The DPI threshold to detect high density screen.
// Higher DPI than this will use device_scale_factor=2.
const unsigned int kHighDensityDPIThreshold = 170;
// 1 inch in mm.
const float kInchInMm = 25.4f;
// Display mode list is sorted by (in descending priority):
// * the area in pixels.
// * refresh rate.
struct DisplayModeSorter {
bool operator()(const DisplayMode& a, const DisplayMode& b) {
if (a.size.GetArea() == b.size.GetArea())
return (a.refresh_rate > b.refresh_rate);
return (a.size.GetArea() > b.size.GetArea());
}
};
} // namespace
// static
std::vector<DisplayMode> DisplayChangeObserver::GetDisplayModeList(
const OutputConfigurator::DisplayState& output) {
typedef std::map<std::pair<int, int>, DisplayMode> DisplayModeMap;
DisplayModeMap display_mode_map;
for (std::vector<const ui::DisplayMode*>::const_iterator it =
output.display->modes().begin();
it != output.display->modes().end();
++it) {
const ui::DisplayMode& mode_info = **it;
const std::pair<int, int> size(mode_info.size().width(),
mode_info.size().height());
const DisplayMode display_mode(mode_info.size(),
mode_info.refresh_rate(),
mode_info.is_interlaced(),
output.display->native_mode() == *it);
// Add the display mode if it isn't already present and override interlaced
// display modes with non-interlaced ones.
DisplayModeMap::iterator display_mode_it = display_mode_map.find(size);
if (display_mode_it == display_mode_map.end())
display_mode_map.insert(std::make_pair(size, display_mode));
else if (display_mode_it->second.interlaced && !display_mode.interlaced)
display_mode_it->second = display_mode;
}
std::vector<DisplayMode> display_mode_list;
for (DisplayModeMap::const_iterator iter = display_mode_map.begin();
iter != display_mode_map.end();
++iter) {
display_mode_list.push_back(iter->second);
}
std::sort(
display_mode_list.begin(), display_mode_list.end(), DisplayModeSorter());
return display_mode_list;
}
DisplayChangeObserver::DisplayChangeObserver() {
Shell::GetInstance()->AddShellObserver(this);
}
DisplayChangeObserver::~DisplayChangeObserver() {
Shell::GetInstance()->RemoveShellObserver(this);
}
ui::OutputState DisplayChangeObserver::GetStateForDisplayIds(
const std::vector<int64>& display_ids) const {
CHECK_EQ(2U, display_ids.size());
DisplayIdPair pair = std::make_pair(display_ids[0], display_ids[1]);
DisplayLayout layout = Shell::GetInstance()->display_manager()->
layout_store()->GetRegisteredDisplayLayout(pair);
return layout.mirrored ? ui::OUTPUT_STATE_DUAL_MIRROR :
ui::OUTPUT_STATE_DUAL_EXTENDED;
}
bool DisplayChangeObserver::GetResolutionForDisplayId(int64 display_id,
gfx::Size* size) const {
DisplayMode mode;
if (!Shell::GetInstance()->display_manager()->GetSelectedModeForDisplayId(
display_id, &mode))
return false;
*size = mode.size;
return true;
}
void DisplayChangeObserver::OnDisplayModeChanged(
const std::vector<OutputConfigurator::DisplayState>& outputs) {
std::vector<DisplayInfo> displays;
std::set<int64> ids;
for (size_t i = 0; i < outputs.size(); ++i) {
const OutputConfigurator::DisplayState& output = outputs[i];
if (output.display->type() == ui::OUTPUT_TYPE_INTERNAL &&
gfx::Display::InternalDisplayId() == gfx::Display::kInvalidDisplayID) {
gfx::Display::SetInternalDisplayId(output.display->display_id());
}
const ui::DisplayMode* mode_info = output.display->current_mode();
if (!mode_info)
continue;
float device_scale_factor = 1.0f;
if (!ui::IsXDisplaySizeBlackListed(
output.display->physical_size().width(),
output.display->physical_size().height()) &&
(kInchInMm * mode_info->size().width() /
output.display->physical_size().width()) > kHighDensityDPIThreshold) {
device_scale_factor = 2.0f;
}
gfx::Rect display_bounds(output.display->origin(), mode_info->size());
std::vector<DisplayMode> display_modes = GetDisplayModeList(output);
std::string name =
output.display->type() == ui::OUTPUT_TYPE_INTERNAL
? l10n_util::GetStringUTF8(IDS_ASH_INTERNAL_DISPLAY_NAME) :
output.display->GetDisplayName();
if (name.empty())
name = l10n_util::GetStringUTF8(IDS_ASH_STATUS_TRAY_UNKNOWN_DISPLAY_NAME);
bool has_overscan = output.display->GetOverscanFlag();
int64 id = output.display->display_id();
ids.insert(id);
displays.push_back(DisplayInfo(id, name, has_overscan));
displays.back().set_device_scale_factor(device_scale_factor);
displays.back().SetBounds(display_bounds);
displays.back().set_native(true);
displays.back().set_display_modes(display_modes);
displays.back().set_touch_support(
output.touch_device_id == 0 ? gfx::Display::TOUCH_SUPPORT_UNAVAILABLE :
gfx::Display::TOUCH_SUPPORT_AVAILABLE);
displays.back().set_available_color_profiles(
output.available_color_profiles);
}
// DisplayManager can be null during the boot.
Shell::GetInstance()->display_manager()->OnNativeDisplaysChanged(displays);
}
void DisplayChangeObserver::OnAppTerminating() {
#if defined(USE_ASH)
// Stop handling display configuration events once the shutdown
// process starts. crbug.com/177014.
Shell::GetInstance()->output_configurator()->PrepareForExit();
#endif
}
} // namespace internal
} // namespace ash
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