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// Copyright 2022 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "remoting/host/linux/x11_display_util.h"
#include <stdint.h>
#include "base/numerics/safe_conversions.h"
#include "ui/gfx/geometry/vector2d.h"
namespace remoting {
constexpr int kDefaultScreenDpi = 96;
constexpr double kMillimetersPerInch = 25.4;
int CalculateDpi(uint16_t length_in_pixels, uint32_t length_in_mm) {
if (length_in_mm == 0) {
return kDefaultScreenDpi;
}
double pixels_per_mm = static_cast<double>(length_in_pixels) / length_in_mm;
double pixels_per_inch = pixels_per_mm * kMillimetersPerInch;
return base::ClampRound(pixels_per_inch);
}
gfx::Vector2d GetMonitorDpi(const x11::RandR::MonitorInfo& monitor) {
return gfx::Vector2d(
CalculateDpi(monitor.width, monitor.width_in_millimeters),
CalculateDpi(monitor.height, monitor.height_in_millimeters));
}
x11::RandRMonitorConfig ToVideoTrackLayout(
const x11::RandR::MonitorInfo& monitor) {
return x11::RandRMonitorConfig(
static_cast<x11::RandRMonitorConfig::ScreenId>(monitor.name),
gfx::Rect(monitor.x, monitor.y, monitor.width, monitor.height),
GetMonitorDpi(monitor));
}
} // namespace remoting
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