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// Copyright 2015 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_color_manager_chromeos.h"
#include <utility>
#include "base/bind.h"
#include "base/bind_helpers.h"
#include "base/command_line.h"
#include "base/files/file_path.h"
#include "base/files/file_util.h"
#include "base/format_macros.h"
#include "base/logging.h"
#include "base/message_loop/message_loop.h"
#include "base/path_service.h"
#include "base/stl_util.h"
#include "base/strings/stringprintf.h"
#include "base/task_runner_util.h"
#include "base/threading/sequenced_worker_pool.h"
#include "chromeos/chromeos_paths.h"
#include "third_party/qcms/src/qcms.h"
#include "ui/display/types/display_snapshot.h"
#include "ui/display/types/gamma_ramp_rgb_entry.h"
#include "ui/display/types/native_display_delegate.h"
#include "ui/gfx/display.h"
#include "ui/gfx/screen.h"
namespace ash {
namespace {
bool ParseFile(const base::FilePath& path,
DisplayColorManager::ColorCalibrationData* data) {
if (!base::PathExists(path)) // No icc file for this display; not an error.
return false;
qcms_profile* display_profile = qcms_profile_from_path(path.value().c_str());
if (!display_profile) {
LOG(WARNING) << "Unable to load ICC file: " << path.value();
return false;
}
size_t vcgt_channel_length =
qcms_profile_get_vcgt_channel_length(display_profile);
if (!vcgt_channel_length) {
LOG(WARNING) << "No vcgt table in ICC file: " << path.value();
qcms_profile_release(display_profile);
return false;
}
std::vector<uint16_t> vcgt_data;
vcgt_data.resize(vcgt_channel_length * 3);
if (!qcms_profile_get_vcgt_rgb_channels(display_profile, &vcgt_data[0])) {
LOG(WARNING) << "Unable to get vcgt data";
qcms_profile_release(display_profile);
return false;
}
data->lut.resize(vcgt_channel_length);
for (size_t i = 0; i < vcgt_channel_length; ++i) {
data->lut[i].r = vcgt_data[i];
data->lut[i].g = vcgt_data[vcgt_channel_length + i];
data->lut[i].b = vcgt_data[(vcgt_channel_length * 2) + i];
}
qcms_profile_release(display_profile);
return true;
}
base::FilePath PathForDisplaySnapshot(const ui::DisplaySnapshot* snapshot) {
base::FilePath path;
CHECK(
PathService::Get(chromeos::DIR_DEVICE_COLOR_CALIBRATION_PROFILES, &path));
path = path.Append(
base::StringPrintf("%08" PRIx64 ".icc", snapshot->product_id()));
return path;
}
} // namespace
DisplayColorManager::DisplayColorManager(
ui::DisplayConfigurator* configurator,
base::SequencedWorkerPool* blocking_pool)
: configurator_(configurator), blocking_pool_(blocking_pool) {
configurator_->AddObserver(this);
}
DisplayColorManager::~DisplayColorManager() {
configurator_->RemoveObserver(this);
STLDeleteValues(&calibration_map_);
}
void DisplayColorManager::OnDisplayModeChanged(
const ui::DisplayConfigurator::DisplayStateList& display_states) {
for (const ui::DisplaySnapshot* state : display_states) {
if (calibration_map_[state->product_id()]) {
ApplyDisplayColorCalibration(state->display_id(), state->product_id());
} else {
if (state->product_id() != ui::DisplaySnapshot::kInvalidProductID)
LoadCalibrationForDisplay(state);
}
}
}
void DisplayColorManager::ApplyDisplayColorCalibration(int64_t display_id,
int64_t product_id) {
if (calibration_map_.find(product_id) != calibration_map_.end()) {
ColorCalibrationData* ramp = calibration_map_[product_id];
if (!configurator_->SetGammaRamp(display_id, ramp->lut))
LOG(WARNING) << "Error applying gamma ramp";
}
}
void DisplayColorManager::LoadCalibrationForDisplay(
const ui::DisplaySnapshot* display) {
if (display->display_id() == gfx::Display::kInvalidDisplayID) {
LOG(WARNING) << "Trying to load calibration data for invalid display id";
return;
}
base::FilePath path = PathForDisplaySnapshot(display);
VLOG(1) << "Loading ICC file " << path.value()
<< " for display id: " << display->display_id()
<< " with product id: " << display->product_id();
scoped_ptr<ColorCalibrationData> data(new ColorCalibrationData());
base::Callback<bool(void)> request(
base::Bind(&ParseFile, path, base::Unretained(data.get())));
base::PostTaskAndReplyWithResult(
blocking_pool_, FROM_HERE, request,
base::Bind(&DisplayColorManager::UpdateCalibrationData, AsWeakPtr(),
display->display_id(), display->product_id(),
base::Passed(std::move(data))));
}
void DisplayColorManager::UpdateCalibrationData(
int64_t display_id,
int64_t product_id,
scoped_ptr<ColorCalibrationData> data,
bool success) {
DCHECK_EQ(base::MessageLoop::current()->type(), base::MessageLoop::TYPE_UI);
if (success) {
// The map takes over ownership of the underlying memory.
calibration_map_[product_id] = data.release();
ApplyDisplayColorCalibration(display_id, product_id);
}
}
DisplayColorManager::ColorCalibrationData::ColorCalibrationData() {}
DisplayColorManager::ColorCalibrationData::~ColorCalibrationData() {}
} // namespace ash
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