public DirtyQuad(Rectangle rect)
{
BoundingRect = rect;
if (false)
// if (rect.Width > 128 && rect.Height > 128)
{
Nodes = new DirtyQuad[4];
int w0 = rect.Width / 2;
int w1 = rect.Width - w0;
int h0 = rect.Height / 2;
int h1 = rect.Height - h0;
int x = rect.X;
int y = rect.Y;
Rectangle childRect0 = new Rectangle(x, y, w0, h0);
Nodes[0] = new DirtyQuad(childRect0);
Rectangle childRect1 = new Rectangle(x + w0, y, w1, h0);
Nodes[1] = new DirtyQuad(childRect1);
Rectangle childRect2 = new Rectangle(x, y + h0, w0, h1);
Nodes[2] = new DirtyQuad(childRect2);
Rectangle childRect3 = new Rectangle(x + w0, y + h0, w1, h1);
Nodes[3] = new DirtyQuad(childRect3);
for (int i = 0; i < 4; i++)
{
Nodes[i].Index = i;
Nodes[i].Parent = this;
if (i < 3)
{
Nodes[i].Next = Nodes[i + 1];
}
}
HasChildren = true;
}
}
public WriteableBitmapChildRenderer(int width, int height)
{
_transparentBrush = new SWM.SolidColorBrush(SWM.Colors.Transparent);
_width = width;
_height = height;
_clearArray = new int[_width];
_clearRect = new System.Windows.Shapes.Rectangle();
_clearRect.Width = _width;
_clearRect.Height = _height;
_img = new Image();
_bmp = new WriteableBitmap(_width, _height);
_img.Source = _bmp;
_img.Width = _width;
_img.Height = _height;
Root = _img;
_text = new TextBlock();
_textTranslate = new SWM.TranslateTransform();
_quads = new DirtyQuad(new Rectangle(0, 0, width, height));
}
DirtyQuad GetNextNode(DirtyQuad current)
{
DirtyQuad next = current.Next;
if (next != null) return next;
if (current.Parent == null) return null;
return GetNextNode(current.Parent);
}