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- // Copyright 2014 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_GFX_GEOMETRY_DIP_UTIL_H_
- #define UI_GFX_GEOMETRY_DIP_UTIL_H_
- #include "ui/gfx/geometry/geometry_export.h"
- namespace gfx {
- class Insets;
- class InsetsF;
- class Point;
- class PointF;
- class Rect;
- class RectF;
- class Size;
- class SizeF;
- // This file contains helper functions to move between DIPs (device-independent
- // pixels) and physical pixels, by multiplying or dividing by device scale
- // factor. These help show the intent of the caller by naming the operation,
- // instead of directly performing a scale operation. More complicated
- // transformations between coordinate spaces than DIP<->physical pixels should
- // be done via more explicit means.
- //
- // Note that functions that receive integer values will convert them to floating
- // point values, which can itself be a lossy operation for large integers. The
- // intention of these methods is to be used for UI values which are relatively
- // small.
- GEOMETRY_EXPORT gfx::PointF ConvertPointToDips(
- const gfx::Point& point_in_pixels,
- float device_scale_factor);
- GEOMETRY_EXPORT gfx::PointF ConvertPointToDips(
- const gfx::PointF& point_in_pixels,
- float device_scale_factor);
- GEOMETRY_EXPORT gfx::PointF ConvertPointToPixels(
- const gfx::Point& point_in_dips,
- float device_scale_factor);
- GEOMETRY_EXPORT gfx::PointF ConvertPointToPixels(
- const gfx::PointF& point_in_dips,
- float device_scale_factor);
- GEOMETRY_EXPORT gfx::SizeF ConvertSizeToDips(const gfx::Size& size_in_pixels,
- float device_scale_factor);
- GEOMETRY_EXPORT gfx::SizeF ConvertSizeToDips(const gfx::SizeF& size_in_pixels,
- float device_scale_factor);
- GEOMETRY_EXPORT gfx::SizeF ConvertSizeToPixels(const gfx::Size& size_in_dips,
- float device_scale_factor);
- GEOMETRY_EXPORT gfx::SizeF ConvertSizeToPixels(const gfx::SizeF& size_in_dips,
- float device_scale_factor);
- GEOMETRY_EXPORT gfx::RectF ConvertRectToDips(const gfx::Rect& rect_in_pixels,
- float device_scale_factor);
- GEOMETRY_EXPORT gfx::RectF ConvertRectToDips(const gfx::RectF& rect_in_pixels,
- float device_scale_factor);
- GEOMETRY_EXPORT gfx::RectF ConvertRectToPixels(const gfx::Rect& rect_in_dips,
- float device_scale_factor);
- GEOMETRY_EXPORT gfx::RectF ConvertRectToPixels(const gfx::RectF& rect_in_dips,
- float device_scale_factor);
- GEOMETRY_EXPORT gfx::InsetsF ConvertInsetsToDips(
- const gfx::Insets& insets_in_pixels,
- float device_scale_factor);
- GEOMETRY_EXPORT gfx::InsetsF ConvertInsetsToDips(
- const gfx::InsetsF& insets_in_pixels,
- float device_scale_factor);
- GEOMETRY_EXPORT gfx::InsetsF ConvertInsetsToPixels(
- const gfx::Insets& insets_in_dips,
- float device_scale_factor);
- GEOMETRY_EXPORT gfx::InsetsF ConvertInsetsToPixels(
- const gfx::InsetsF& insets_in_dips,
- float device_scale_factor);
- } // namespace gfx
- #endif // UI_GFX_GEOMETRY_DIP_UTIL_H_
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