public static void Scale(this ICanvas canvas, Size scale)
{
if (scale.Width != 1 || scale.Height != 1)
{
canvas.Transform(Transform.Scale(scale));
}
}
public static void Scale(this ICanvas canvas, double scale)
{
if (scale != 1)
{
canvas.Transform(Transform.Scale(scale, scale));
}
}
public static void Scale(this ICanvas canvas, double sx, double sy)
{
if (sx != 1 || sy != 1)
{
canvas.Transform(Transform.Scale(sx, sy));
}
}
public static Transform StretchFillRect(Rect sourceRect, Rect destRect)
{
var t1 = Transform.Translate(-sourceRect.TopLeft);
var s = Transform.Scale(destRect.Width / sourceRect.Width, destRect.Height / sourceRect.Height);
var t2 = Transform.Translate(destRect.TopLeft);
return(t2 * s * t1);
}
public static Transform AspectFillRect(Rect sourceRect, Rect destRect)
{
var scalex = destRect.Width / sourceRect.Width;
var scaley = destRect.Height / sourceRect.Height;
var scale = Math.Min(scalex, scaley);
var t1 = Transform.Translate(-sourceRect.TopLeft);
var s = Transform.Scale(scale);
var t2 = Transform.Translate(destRect.TopLeft);
var t3 = Transform.Translate(
(destRect.Width - scale * sourceRect.Width) / 2,
(destRect.Height - scale * sourceRect.Height) / 2);
return(t3 * t2 * s * t1);
}
Transform ReadTransform(string raw)
{
if (string.IsNullOrWhiteSpace(raw))
{
return(Transform.Identity);
}
var s = raw.Trim();
var calls = s.Split(new[] { ')' }, StringSplitOptions.RemoveEmptyEntries);
var t = Transform.Identity;
foreach (var c in calls)
{
var args = c.Split(new[] { '(', ',', ' ', '\t', '\r', '\n' }, StringSplitOptions.RemoveEmptyEntries);
var nt = Transform.Identity;
switch (args [0])
{
case "matrix":
if (args.Length == 7)
{
nt = new Transform(
ReadNumber(args[1]),
ReadNumber(args[2]),
ReadNumber(args[3]),
ReadNumber(args[4]),
ReadNumber(args[5]),
ReadNumber(args[6]));
}
else
{
throw new NotSupportedException("Matrices are expected to have 6 elements, this one has " + (args.Length - 1));
}
break;
case "translate":
if (args.Length >= 3)
{
nt = Transform.Translate(new Size(ReadNumber(args [1]), ReadNumber(args [2])));
}
else if (args.Length >= 2)
{
nt = Transform.Translate(new Size(ReadNumber(args[1]), 0));
}
break;
case "scale":
if (args.Length >= 3)
{
nt = Transform.Scale(new Size(ReadNumber(args[1]), ReadNumber(args[2])));
}
else if (args.Length >= 2)
{
var sx = ReadNumber(args [1]);
nt = Transform.Scale(new Size(sx, sx));
}
break;
case "rotate":
var a = ReadNumber(args [1]);
if (args.Length >= 4)
{
var x = ReadNumber(args [2]);
var y = ReadNumber(args [3]);
var t1 = Transform.Translate(new Size(x, y));
var t2 = Transform.Rotate(a);
var t3 = Transform.Translate(new Size(-x, -y));
nt = t1 * t2 * t3;
}
else
{
nt = Transform.Rotate(a);
}
break;
default:
throw new NotSupportedException("Can't transform " + args[0]);
}
t = t * nt;
}
return(t);
}
public static Transform ScaleAt(double sx, double sy, double x, double y)
{
return(Transform.Translate(x, y) * Transform.Scale(sx, sy) * Transform.Translate(-x, -y));
}
