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// Copyright (c) 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 "remoting/host/screen_resolution.h"
#include <algorithm>
#include <limits>
#include "base/logging.h"
namespace remoting {
ScreenResolution::ScreenResolution()
: dimensions_(webrtc::DesktopSize(0, 0)),
dpi_(webrtc::DesktopVector(0, 0)) {
}
ScreenResolution::ScreenResolution(const webrtc::DesktopSize& dimensions,
const webrtc::DesktopVector& dpi)
: dimensions_(dimensions),
dpi_(dpi) {
// Check that dimensions are not negative.
DCHECK(!dimensions.is_empty() || dimensions.equals(webrtc::DesktopSize()));
DCHECK_GE(dpi.x(), 0);
DCHECK_GE(dpi.y(), 0);
}
webrtc::DesktopSize ScreenResolution::ScaleDimensionsToDpi(
const webrtc::DesktopVector& new_dpi) const {
int64 width = dimensions_.width();
int64 height = dimensions_.height();
// Scale the screen dimensions to new DPI.
width = std::min(width * new_dpi.x() / dpi_.x(),
static_cast<int64>(std::numeric_limits<int32>::max()));
height = std::min(height * new_dpi.y() / dpi_.y(),
static_cast<int64>(std::numeric_limits<int32>::max()));
return webrtc::DesktopSize(width, height);
}
bool ScreenResolution::IsEmpty() const {
return dimensions_.is_empty() || dpi_.is_zero();
}
bool ScreenResolution::Equals(const ScreenResolution& other) const {
return dimensions_.equals(other.dimensions()) && dpi_.equals(other.dpi());
}
} // namespace remoting
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