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ash / utility / transformer_util.cc [blame]
// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ash/utility/transformer_util.h"
#include <cmath>
#include "ui/display/display_transform.h"
#include "ui/gfx/geometry/size_f.h"
#include "ui/gfx/geometry/transform.h"
namespace ash {
namespace {
display::Display::Rotation RotationBetween(
display::Display::Rotation old_rotation,
display::Display::Rotation new_rotation) {
return static_cast<display::Display::Rotation>(
display::Display::Rotation::ROTATE_0 +
((new_rotation - old_rotation) + 4) % 4);
}
} // namespace
gfx::Transform CreateRotationTransform(display::Display::Rotation old_rotation,
display::Display::Rotation new_rotation,
const gfx::SizeF& size_to_rotate) {
return display::CreateRotationTransform(
RotationBetween(old_rotation, new_rotation), size_to_rotate);
}
} // namespace ash