ui/gfx/geometry/dip_util.cc

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "ui/gfx/geometry/dip_util.h"
   6
   7 #include "ui/gfx/geometry/point.h"
   8 #include "ui/gfx/geometry/point_conversions.h"
   9 #include "ui/gfx/geometry/point_f.h"
  10 #include "ui/gfx/geometry/rect.h"
  11 #include "ui/gfx/geometry/rect_conversions.h"
  12 #include "ui/gfx/geometry/size.h"
  13 #include "ui/gfx/geometry/size_conversions.h"
  14
  15 namespace gfx {
  16
  17 gfx::Point ConvertPointToDIP(float scale_factor,
  18                              const gfx::Point& point_in_pixel) {
  19   return gfx::ToFlooredPoint(
  20       gfx::ScalePoint(point_in_pixel, 1.0f / scale_factor));
  21 }
  22
  23 gfx::PointF ConvertPointToDIP(float scale_factor,
  24                               const gfx::PointF& point_in_pixel) {
  25   return gfx::ScalePoint(point_in_pixel, 1.0f / scale_factor);
  26 }
  27
  28 gfx::Size ConvertSizeToDIP(float scale_factor, const gfx::Size& size_in_pixel) {
  29   return gfx::ToFlooredSize(gfx::ScaleSize(size_in_pixel, 1.0f / scale_factor));
  30 }
  31
  32 gfx::Rect ConvertRectToDIP(float scale_factor, const gfx::Rect& rect_in_pixel) {
  33   return gfx::ToFlooredRectDeprecated(
  34       gfx::ScaleRect(rect_in_pixel, 1.0f / scale_factor));
  35 }
  36
  37 gfx::Point ConvertPointToPixel(float scale_factor,
  38                                const gfx::Point& point_in_dip) {
  39   return gfx::ToFlooredPoint(gfx::ScalePoint(point_in_dip, scale_factor));
  40 }
  41
  42 gfx::Size ConvertSizeToPixel(float scale_factor, const gfx::Size& size_in_dip) {
  43   return gfx::ToFlooredSize(gfx::ScaleSize(size_in_dip, scale_factor));
  44 }
  45
  46 gfx::Rect ConvertRectToPixel(float scale_factor, const gfx::Rect& rect_in_dip) {
  47   // Use ToEnclosingRect() to ensure we paint all the possible pixels
  48   // touched. ToEnclosingRect() floors the origin, and ceils the max
  49   // coordinate. To do otherwise (such as flooring the size) potentially
  50   // results in rounding down and not drawing all the pixels that are
  51   // touched.
  52   return gfx::ToEnclosingRect(
  53       gfx::RectF(gfx::ScalePoint(rect_in_dip.origin(), scale_factor),
  54                  gfx::ScaleSize(rect_in_dip.size(), scale_factor)));
  55 }
  56
  57 }  // namespace gfx