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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 "remoting/protocol/mouse_input_filter.h"
#include "remoting/proto/event.pb.h"
namespace remoting {
namespace protocol {
MouseInputFilter::MouseInputFilter() {
}
MouseInputFilter::MouseInputFilter(InputStub* input_stub)
: InputFilter(input_stub) {
}
MouseInputFilter::~MouseInputFilter() {
}
void MouseInputFilter::InjectMouseEvent(const MouseEvent& event) {
if (input_max_.is_empty() || output_max_.is_empty())
return;
// We scale based on the maximum input & output coordinates, rather than the
// input and output sizes, so that it's possible to reach the edge of the
// output when up-scaling. We also take care to round up or down correctly,
// which is important when down-scaling.
MouseEvent out_event(event);
if (out_event.has_x()) {
int x = out_event.x() * output_max_.width();
x = (x + input_max_.width() / 2) / input_max_.width();
out_event.set_x(std::max(0, std::min(output_max_.width(), x)));
}
if (out_event.has_y()) {
int y = out_event.y() * output_max_.height();
y = (y + input_max_.height() / 2) / input_max_.height();
out_event.set_y(std::max(0, std::min(output_max_.height(), y)));
}
InputFilter::InjectMouseEvent(out_event);
}
void MouseInputFilter::set_input_size(const webrtc::DesktopSize& size) {
input_max_.set(size.width() - 1, size.height() - 1);
}
void MouseInputFilter::set_output_size(const webrtc::DesktopSize& size) {
output_max_.set(size.width() - 1, size.height() - 1);
}
} // namespace protocol
} // namespace remoting
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