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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.
#ifndef UI_COMPOSITOR_DIP_UTIL_H_
#define UI_COMPOSITOR_DIP_UTIL_H_
#include "base/basictypes.h"
#include "ui/compositor/compositor_export.h"
#include "ui/gfx/geometry/point_f.h"
namespace gfx {
class Point;
class Size;
class Rect;
} // namespace gfx
namespace ui {
class Layer;
COMPOSITOR_EXPORT float GetDeviceScaleFactor(const Layer* layer);
// Utility functions that convert point/size/rect between
// DIP and pixel coordinates system.
COMPOSITOR_EXPORT gfx::Point ConvertPointToDIP(
const Layer* layer,
const gfx::Point& point_in_pixel);
COMPOSITOR_EXPORT gfx::PointF ConvertPointToDIP(
const Layer* layer,
const gfx::PointF& point_in_pixel);
COMPOSITOR_EXPORT gfx::Size ConvertSizeToDIP(
const Layer* layer,
const gfx::Size& size_in_pixel);
COMPOSITOR_EXPORT gfx::Rect ConvertRectToDIP(
const Layer* layer,
const gfx::Rect& rect_in_pixel);
COMPOSITOR_EXPORT gfx::Point ConvertPointToPixel(
const Layer* layer,
const gfx::Point& point_in_dip);
COMPOSITOR_EXPORT gfx::Size ConvertSizeToPixel(
const Layer* layer,
const gfx::Size& size_in_dip);
COMPOSITOR_EXPORT gfx::Rect ConvertRectToPixel(
const Layer* layer,
const gfx::Rect& rect_in_dip);
// Snaps the |layer_to_snap| to the physical pixel boundary.
// |snapped_layer| is a reference layer that should also be
// snapped at the pysical pixel boundary.
COMPOSITOR_EXPORT void SnapLayerToPhysicalPixelBoundary(
ui::Layer* snapped_layer,
ui::Layer* layer_to_snap);
} // namespace ui
#endif // UI_COMPOSITOR_DIP_UTIL_H_
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