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// Copyright (c) 2006-2008 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 "chrome/browser/point_buffer.h"
#include "base/logging.h"
PointBuffer::PointBuffer() : points_(NULL),
next_(0),
max_count_(0) {
}
PointBuffer::~PointBuffer() {
if (points_) {
delete []points_;
}
}
void PointBuffer::AddPoint(int x, int y) {
POINT t;
t.x = x;
t.y = y;
AddPoint(t);
}
void PointBuffer::AddPoint(const POINT &p) {
GrowPointBufferIfNeeded();
points_[next_++] = p;
}
HRGN PointBuffer::GetCurrentPolygonRegion() const {
return ::CreatePolygonRgn(points_, next_, ALTERNATE);
}
void PointBuffer::GrowPointBufferIfNeeded() {
if (next_ == max_count_) {
int nmc = 32 + (max_count_ * 2);
POINT *new_buffer = new POINT[nmc];
if (next_ > 0) {
memcpy(new_buffer, points_, sizeof(POINT) * next_);
delete []points_;
}
points_ = new_buffer;
max_count_ = nmc;
}
}
#if 0
void PointBuffer::Log() {
LOG(INFO) << "PointBuffer {";
int i;
for (i=0 ; i < next_ ; i++) {
LOG(INFO) << "\t" << points_[i].x << ", " << points_[i].y;
}
}
#endif
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