src/ui/compositor/dip_util.cc

   1 // Copyright (c) 2012 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/compositor/dip_util.h"
   6
   7 #include "base/command_line.h"
   8 #include "ui/compositor/compositor.h"
   9 #include "ui/compositor/compositor_switches.h"
  10 #include "ui/compositor/layer.h"
  11 #include "ui/gfx/display.h"
  12 #include "ui/gfx/point.h"
  13 #include "ui/gfx/point_conversions.h"
  14 #include "ui/gfx/rect.h"
  15 #include "ui/gfx/rect_conversions.h"
  16 #include "ui/gfx/size.h"
  17 #include "ui/gfx/size_conversions.h"
  18
  19 namespace ui {
  20
  21 float GetDeviceScaleFactor(const Layer* layer) {
  22   return layer->device_scale_factor();
  23 }
  24
  25 gfx::Point ConvertPointToDIP(const Layer* layer,
  26                              const gfx::Point& point_in_pixel) {
  27   return gfx::ToFlooredPoint(
  28       gfx::ScalePoint(point_in_pixel, 1.0f / GetDeviceScaleFactor(layer)));
  29 }
  30
  31 gfx::PointF ConvertPointToDIP(const Layer* layer,
  32                               const gfx::PointF& point_in_pixel) {
  33   return gfx::ScalePoint(point_in_pixel, 1.0f / GetDeviceScaleFactor(layer));
  34 }
  35
  36 gfx::Size ConvertSizeToDIP(const Layer* layer,
  37                            const gfx::Size& size_in_pixel) {
  38   return gfx::ToFlooredSize(
  39       gfx::ScaleSize(size_in_pixel, 1.0f / GetDeviceScaleFactor(layer)));
  40 }
  41
  42 gfx::Rect ConvertRectToDIP(const Layer* layer,
  43                            const gfx::Rect& rect_in_pixel) {
  44   float scale = 1.0f / GetDeviceScaleFactor(layer);
  45   return gfx::ToFlooredRectDeprecated(gfx::ScaleRect(rect_in_pixel, scale));
  46 }
  47
  48 gfx::Point ConvertPointToPixel(const Layer* layer,
  49                                const gfx::Point& point_in_dip) {
  50   return gfx::ToFlooredPoint(
  51       gfx::ScalePoint(point_in_dip, GetDeviceScaleFactor(layer)));
  52 }
  53
  54 gfx::Size ConvertSizeToPixel(const Layer* layer,
  55                              const gfx::Size& size_in_dip) {
  56   return gfx::ToFlooredSize(
  57       gfx::ScaleSize(size_in_dip, GetDeviceScaleFactor(layer)));
  58 }
  59
  60 gfx::Rect ConvertRectToPixel(const Layer* layer,
  61                              const gfx::Rect& rect_in_dip) {
  62   float scale = GetDeviceScaleFactor(layer);
  63   // Use ToEnclosingRect() to ensure we paint all the possible pixels
  64   // touched. ToEnclosingRect() floors the origin, and ceils the max
  65   // coordinate. To do otherwise (such as flooring the size) potentially
  66   // results in rounding down and not drawing all the pixels that are
  67   // touched.
  68   return gfx::ToEnclosingRect(
  69       gfx::RectF(gfx::ScalePoint(rect_in_dip.origin(), scale),
  70                  gfx::ScaleSize(rect_in_dip.size(), scale)));
  71 }
  72
  73 }  // namespace ui