cc/base/region.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 "cc/base/region.h"
   6 #include "base/values.h"
   7
   8 namespace cc {
   9
  10 Region::Region() {
  11 }
  12
  13 Region::Region(const Region& region)
  14     : skregion_(region.skregion_) {
  15 }
  16
  17 Region::Region(const gfx::Rect& rect)
  18     : skregion_(gfx::RectToSkIRect(rect)) {
  19 }
  20
  21 Region::~Region() {
  22 }
  23
  24 const Region& Region::operator=(const gfx::Rect& rect) {
  25   skregion_ = SkRegion(gfx::RectToSkIRect(rect));
  26   return *this;
  27 }
  28
  29 const Region& Region::operator=(const Region& region) {
  30   skregion_ = region.skregion_;
  31   return *this;
  32 }
  33
  34 void Region::Swap(Region* region) {
  35   region->skregion_.swap(skregion_);
  36 }
  37
  38 void Region::Clear() {
  39   skregion_.setEmpty();
  40 }
  41
  42 bool Region::IsEmpty() const {
  43   return skregion_.isEmpty();
  44 }
  45
  46 int Region::GetRegionComplexity() const {
  47   return skregion_.computeRegionComplexity();
  48 }
  49
  50 bool Region::Contains(const gfx::Point& point) const {
  51   return skregion_.contains(point.x(), point.y());
  52 }
  53
  54 bool Region::Contains(const gfx::Rect& rect) const {
  55   if (rect.IsEmpty())
  56     return true;
  57   return skregion_.contains(gfx::RectToSkIRect(rect));
  58 }
  59
  60 bool Region::Contains(const Region& region) const {
  61   if (region.IsEmpty())
  62     return true;
  63   return skregion_.contains(region.skregion_);
  64 }
  65
  66 bool Region::Intersects(const gfx::Rect& rect) const {
  67   return skregion_.intersects(gfx::RectToSkIRect(rect));
  68 }
  69
  70 bool Region::Intersects(const Region& region) const {
  71   return skregion_.intersects(region.skregion_);
  72 }
  73
  74 void Region::Subtract(const gfx::Rect& rect) {
  75   skregion_.op(gfx::RectToSkIRect(rect), SkRegion::kDifference_Op);
  76 }
  77
  78 void Region::Subtract(const Region& region) {
  79   skregion_.op(region.skregion_, SkRegion::kDifference_Op);
  80 }
  81
  82 void Region::Union(const gfx::Rect& rect) {
  83   skregion_.op(gfx::RectToSkIRect(rect), SkRegion::kUnion_Op);
  84 }
  85
  86 void Region::Union(const Region& region) {
  87   skregion_.op(region.skregion_, SkRegion::kUnion_Op);
  88 }
  89
  90 void Region::Intersect(const gfx::Rect& rect) {
  91   skregion_.op(gfx::RectToSkIRect(rect), SkRegion::kIntersect_Op);
  92 }
  93
  94 void Region::Intersect(const Region& region) {
  95   skregion_.op(region.skregion_, SkRegion::kIntersect_Op);
  96 }
  97
  98 std::string Region::ToString() const {
  99   if (IsEmpty())
 100     return gfx::Rect().ToString();
 101
 102   std::string result;
 103   for (Iterator it(*this); it.has_rect(); it.next()) {
 104     if (!result.empty())
 105       result += " | ";
 106     result += it.rect().ToString();
 107   }
 108   return result;
 109 }
 110
 111 scoped_ptr<base::Value> Region::AsValue() const {
 112   scoped_ptr<base::ListValue> result(new base::ListValue());
 113   for (Iterator it(*this); it.has_rect(); it.next()) {
 114     gfx::Rect rect(it.rect());
 115     result->AppendInteger(rect.x());
 116     result->AppendInteger(rect.y());
 117     result->AppendInteger(rect.width());
 118     result->AppendInteger(rect.height());
 119   }
 120   return result.PassAs<base::Value>();
 121 }
 122
 123 Region::Iterator::Iterator() {
 124 }
 125
 126 Region::Iterator::Iterator(const Region& region)
 127     : it_(region.skregion_) {
 128 }
 129
 130 Region::Iterator::~Iterator() {
 131 }
 132
 133 }  // namespace cc