Move CPWL_Utils::GetCenterSquare to CFX_FloatRect

This method is working on the FloatRect content so move it to CFX_FloatRect.

Change-Id: I60aabf6e3b86aa9acc59f86cff69347ec5fe5033
Reviewed-on: https://pdfium-review.googlesource.com/7712
Commit-Queue: dsinclair <dsinclair@chromium.org>
Reviewed-by: Tom Sepez <tsepez@chromium.org>

1 files changed, 11 insertions, 0 deletions

diff --git a/core/fxcrt/fx_coordinates.cpp b/core/fxcrt/fx_coordinates.cpp
index 0b6aed44cc..752591d3ed 100644
--- a/core/fxcrt/fx_coordinates.cpp
+++ b/core/fxcrt/fx_coordinates.cpp
@@ -157,6 +157,17 @@ FX_RECT CFX_FloatRect::GetClosestRect() const {
   return rect;
 }
 
+CFX_FloatRect CFX_FloatRect::GetCenterSquare() const {
+  float fWidth = right - left;
+  float fHeight = top - bottom;
+  float fHalfWidth = (fWidth > fHeight) ? fHeight / 2 : fWidth / 2;
+
+  float fCenterX = (left + right) / 2.0f;
+  float fCenterY = (top + bottom) / 2.0f;
+  return CFX_FloatRect(fCenterX - fHalfWidth, fCenterY - fHalfWidth,
+                       fCenterX + fHalfWidth, fCenterY + fHalfWidth);
+}
+
 bool CFX_FloatRect::Contains(const CFX_PointF& point) const {
   CFX_FloatRect n1(*this);
   n1.Normalize();