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      1 // Copyright 2013 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/box_f.h"
      6 
      7 #include "base/strings/stringprintf.h"
      8 
      9 namespace gfx {
     10 
     11 std::string BoxF::ToString() const {
     12   return base::StringPrintf("%s %fx%fx%f",
     13                             origin().ToString().c_str(),
     14                             width_,
     15                             height_,
     16                             depth_);
     17 }
     18 
     19 bool BoxF::IsEmpty() const {
     20   return (width_ == 0 && height_ == 0) ||
     21          (width_ == 0 && depth_ == 0) ||
     22          (height_ == 0 && depth_ == 0);
     23 }
     24 
     25 void BoxF::Union(const BoxF& box) {
     26   if (IsEmpty()) {
     27     *this = box;
     28     return;
     29   }
     30   if (box.IsEmpty())
     31     return;
     32 
     33   float min_x = std::min(x(), box.x());
     34   float min_y = std::min(y(), box.y());
     35   float min_z = std::min(z(), box.z());
     36   float max_x = std::max(right(), box.right());
     37   float max_y = std::max(bottom(), box.bottom());
     38   float max_z = std::max(front(), box.front());
     39 
     40   origin_.SetPoint(min_x, min_y, min_z);
     41   width_ = max_x - min_x;
     42   height_ = max_y - min_y;
     43   depth_ = max_z - min_z;
     44 }
     45 
     46 BoxF UnionBoxes(const BoxF& a, const BoxF& b) {
     47   BoxF result = a;
     48   result.Union(b);
     49   return result;
     50 }
     51 
     52 }  // namespace gfx
     53