Move dip utils to gfx/geometry

ui/gfx/geometry/dip_util.cc

+// 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.
+
+#include "ui/gfx/geometry/dip_util.h"
+
+#include "ui/gfx/geometry/point_f.h"
+#include "ui/gfx/point.h"
+#include "ui/gfx/point_conversions.h"
+#include "ui/gfx/rect.h"
+#include "ui/gfx/rect_conversions.h"
+#include "ui/gfx/size.h"
+#include "ui/gfx/size_conversions.h"
+
+namespace gfx {
+
+gfx::Point ConvertPointToDIP(float scale_factor,
+                             const gfx::Point& point_in_pixel) {
+  return gfx::ToFlooredPoint(
+      gfx::ScalePoint(point_in_pixel, 1.0f / scale_factor));
+}
+
+gfx::PointF ConvertPointToDIP(float scale_factor,
+                              const gfx::PointF& point_in_pixel) {
+  return gfx::ScalePoint(point_in_pixel, 1.0f / scale_factor);
+}
+
+gfx::Size ConvertSizeToDIP(float scale_factor, const gfx::Size& size_in_pixel) {
+  return gfx::ToFlooredSize(gfx::ScaleSize(size_in_pixel, 1.0f / scale_factor));
+}
+
+gfx::Rect ConvertRectToDIP(float scale_factor, const gfx::Rect& rect_in_pixel) {
+  return gfx::ToFlooredRectDeprecated(
+      gfx::ScaleRect(rect_in_pixel, 1.0f / scale_factor));
+}
+
+gfx::Point ConvertPointToPixel(float scale_factor,
+                               const gfx::Point& point_in_dip) {
+  return gfx::ToFlooredPoint(gfx::ScalePoint(point_in_dip, scale_factor));
+}
+
+gfx::Size ConvertSizeToPixel(float scale_factor, const gfx::Size& size_in_dip) {
+  return gfx::ToFlooredSize(gfx::ScaleSize(size_in_dip, scale_factor));
+}
+
+gfx::Rect ConvertRectToPixel(float scale_factor, const gfx::Rect& rect_in_dip) {
+  // Use ToEnclosingRect() to ensure we paint all the possible pixels
+  // touched. ToEnclosingRect() floors the origin, and ceils the max
+  // coordinate. To do otherwise (such as flooring the size) potentially
+  // results in rounding down and not drawing all the pixels that are
+  // touched.
+  return gfx::ToEnclosingRect(
+      gfx::RectF(gfx::ScalePoint(rect_in_dip.origin(), scale_factor),
+                 gfx::ScaleSize(rect_in_dip.size(), scale_factor)));
+}
+
+}  // namespace gfx