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// Copyright (c) 2012 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 "chrome/browser/chromeos/display/overscan_calibrator.h"
#include "ash/display/display_controller.h"
#include "ash/shell.h"
#include "ash/shell_window_ids.h"
#include "base/callback.h"
#include "chrome/browser/chromeos/display/display_preferences.h"
#include "ui/aura/window.h"
#include "ui/compositor/layer.h"
#include "ui/gfx/canvas.h"
namespace chromeos {
OverscanCalibrator::OverscanCalibrator(
const gfx::Display& target_display, const gfx::Insets& initial_insets)
: display_(target_display),
insets_(initial_insets),
initial_insets_(initial_insets),
committed_(false) {
// Undo the overscan calibration temporarily so that the user can see
// dark boundary and current overscan region.
ash::Shell::GetInstance()->display_controller()->SetOverscanInsets(
display_.id(), gfx::Insets());
aura::RootWindow* root = ash::Shell::GetInstance()->display_controller()->
GetRootWindowForDisplayId(display_.id());
ui::Layer* parent_layer = ash::Shell::GetContainer(
root, ash::internal::kShellWindowId_OverlayContainer)->layer();
calibration_layer_.reset(new ui::Layer());
calibration_layer_->SetOpacity(0.5f);
calibration_layer_->SetBounds(parent_layer->bounds());
calibration_layer_->set_delegate(this);
parent_layer->Add(calibration_layer_.get());
}
OverscanCalibrator::~OverscanCalibrator() {
// Overscan calibration has finished without commit, so the display has to
// be the original offset.
if (!committed_) {
ash::Shell::GetInstance()->display_controller()->SetOverscanInsets(
display_.id(), initial_insets_);
}
}
void OverscanCalibrator::Commit() {
SetDisplayOverscan(display_, insets_);
committed_ = true;
}
void OverscanCalibrator::UpdateInsets(const gfx::Insets& insets) {
insets_ = insets;
calibration_layer_->SchedulePaint(calibration_layer_->bounds());
}
void OverscanCalibrator::OnPaintLayer(gfx::Canvas* canvas) {
static const SkColor transparent = SkColorSetARGB(0, 0, 0, 0);
gfx::Rect full_bounds = calibration_layer_->bounds();
gfx::Rect inner_bounds = full_bounds;
inner_bounds.Inset(insets_);
canvas->FillRect(full_bounds, SK_ColorBLACK);
canvas->FillRect(inner_bounds, transparent, SkXfermode::kClear_Mode);
}
void OverscanCalibrator::OnDeviceScaleFactorChanged(
float device_scale_factor) {
// TODO(mukai): Cancel the overscan calibration when the device
// configuration has changed.
}
base::Closure OverscanCalibrator::PrepareForLayerBoundsChange() {
return base::Closure();
}
} // namespace chromeos
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