ui/gfx/rect_conversions.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/gfx/rect_conversions.h"
   6
   7 #include <cmath>
   8
   9 #include "base/logging.h"
  10 #include "ui/gfx/safe_integer_conversions.h"
  11
  12 namespace gfx {
  13
  14 Rect ToEnclosingRect(const RectF& rect) {
  15   int min_x = ToFlooredInt(rect.origin().x());
  16   int min_y = ToFlooredInt(rect.origin().y());
  17   float max_x = rect.origin().x() + rect.size().width();
  18   float max_y = rect.origin().y() + rect.size().height();
  19   int width = std::max(ToCeiledInt(max_x) - min_x, 0);
  20   int height = std::max(ToCeiledInt(max_y) - min_y, 0);
  21   return Rect(min_x, min_y, width, height);
  22 }
  23
  24 Rect ToEnclosedRect(const RectF& rect) {
  25   int min_x = ToCeiledInt(rect.origin().x());
  26   int min_y = ToCeiledInt(rect.origin().y());
  27   float max_x = rect.origin().x() + rect.size().width();
  28   float max_y = rect.origin().y() + rect.size().height();
  29   int width = std::max(ToFlooredInt(max_x) - min_x, 0);
  30   int height = std::max(ToFlooredInt(max_y) - min_y, 0);
  31   return Rect(min_x, min_y, width, height);
  32 }
  33
  34 Rect ToNearestRect(const RectF& rect) {
  35   float float_min_x = rect.origin().x();
  36   float float_min_y = rect.origin().y();
  37   float float_max_x = float_min_x + rect.size().width();
  38   float float_max_y = float_min_y + rect.size().height();
  39
  40   int min_x = ToRoundedInt(float_min_x);
  41   int min_y = ToRoundedInt(float_min_y);
  42   int max_x = ToRoundedInt(float_max_x);
  43   int max_y = ToRoundedInt(float_max_y);
  44
  45   // If these DCHECKs fail, you're using the wrong method, consider using
  46   // ToEnclosingRect or ToEnclosedRect instead.
  47   DCHECK(std::abs(min_x - float_min_x) < 0.01f);
  48   DCHECK(std::abs(min_y - float_min_y) < 0.01f);
  49   DCHECK(std::abs(max_x - float_max_x) < 0.01f);
  50   DCHECK(std::abs(max_y - float_max_y) < 0.01f);
  51
  52   return Rect(min_x, min_y, max_x - min_x, max_y - min_y);
  53 }
  54
  55 Rect ToFlooredRectDeprecated(const RectF& rect) {
  56   return Rect(ToFlooredInt(rect.origin().x()),
  57               ToFlooredInt(rect.origin().y()),
  58               ToFlooredInt(rect.size().width()),
  59               ToFlooredInt(rect.size().height()));
  60 }
  61
  62 }  // namespace gfx
  63