public void DrawImage(IImage image, Rect frame, double alpha = 1.0)
{
var ii = image as ImageImage;
if (ii != null)
{
if (alpha < 0.999)
{
var i = new ImageAttributes();
var mat = new ColorMatrix(new float[][] {
new[] { 1.0f, 0.0f, 0.0f, 0.0f, 0.0f },
new[] { 0.0f, 1.0f, 0.0f, 0.0f, 0.0f },
new[] { 0.0f, 0.0f, 1.0f, 0.0f, 0.0f },
new[] { 0.0f, 0.0f, 0.0f, (float)alpha, 0.0f },
new[] { 0.0f, 0.0f, 0.0f, 0.0f, 1.0f }
});
i.SetColorMatrix(mat);
var size = ii.Image.Size;
graphics.DrawImage(ii.Image, Conversions.GetRectangle(frame),
0, 0, size.Width, size.Height, GraphicsUnit.Pixel, i);
}
else
{
graphics.DrawImage(ii.Image, Conversions.GetRectangleF(frame));
}
}
}
public void DrawRectangle(Rect frame, Size corner, Pen pen = null, Brush brush = null)
{
if (corner.Width > 0 || corner.Height > 0)
{
using (var path = new GraphicsPath()) {
var xdia = corner.Width * 2;
var ydia = corner.Height * 2;
if (xdia > frame.Width)
{
xdia = frame.Width;
}
if (ydia > frame.Height)
{
ydia = frame.Height;
}
// define a corner
var Corner = Conversions.GetRectangleF(frame);
path.AddArc(Corner, 180, 90);
// top right
Corner.X += (float)(frame.Width - xdia);
path.AddArc(Corner, 270, 90);
// bottom right
Corner.Y += (float)(frame.Height - ydia);
path.AddArc(Corner, 0, 90);
// bottom left
Corner.X -= (float)(frame.Width - xdia);
path.AddArc(Corner, 90, 90);
// end path
path.CloseFigure();
if (brush != null)
{
graphics.FillPath(brush.GetBrush(frame), path);
}
if (pen != null)
{
graphics.DrawPath(pen.GetPen(), path);
}
}
}
else
{
if (brush != null)
{
graphics.FillRectangle(brush.GetBrush(frame), Conversions.GetRectangleF(frame));
}
if (pen != null)
{
var r = Conversions.GetRectangleF(frame);
graphics.DrawRectangle(pen.GetPen(), r.X, r.Y, r.Width, r.Height);
}
}
}
public void DrawEllipse(Rect frame, Pen pen = null, Brush brush = null)
{
if (brush != null)
{
graphics.FillEllipse(brush.GetBrush(frame), Conversions.GetRectangleF(frame));
}
if (pen != null)
{
graphics.DrawEllipse(pen.GetPen(), Conversions.GetRectangleF(frame));
}
}
public void DrawRectangle(Rect frame, Pen pen = null, Brush brush = null)
{
if (brush != null)
{
graphics.FillRectangle(brush.GetBrush(frame), Conversions.GetRectangleF(frame));
}
if (pen != null)
{
var r = Conversions.GetRectangleF(frame);
graphics.DrawRectangle(pen.GetPen(), r.X, r.Y, r.Width, r.Height);
}
}
public void DrawPath(IEnumerable <PathOp> ops, Pen pen = null, Brush brush = null)
{
using (var path = new GraphicsPath()) {
var bb = new BoundingBoxBuilder();
var position = Point.Zero;
foreach (var op in ops)
{
var mt = op as MoveTo;
if (mt != null)
{
var p = mt.Point;
position = p;
bb.Add(p);
continue;
}
var lt = op as LineTo;
if (lt != null)
{
var p = lt.Point;
path.AddLine(Conversions.GetPointF(position), Conversions.GetPointF(p));
position = p;
bb.Add(p);
continue;
}
var at = op as ArcTo;
if (at != null)
{
var p = at.Point;
Point c1, c2;
at.GetCircles(position, out c1, out c2);
var circleCenter = (at.LargeArc ^ at.SweepClockwise) ? c1 : c2;
var rect = new Rect(circleCenter - at.Radius, at.Radius * 2);
var startAngle = Conversions.RadToDeg((float)Math.Atan2(position.Y - circleCenter.Y, position.X - circleCenter.X));
var endAngle = Conversions.RadToDeg((float)Math.Atan2(p.Y - circleCenter.Y, p.X - circleCenter.X));
var sweepAngle = endAngle - startAngle;
if (at.SweepClockwise && sweepAngle < 0)
{
// If we want to go CW, sweepAngle needs to be positive
sweepAngle += 360.0f;
}
else if (!at.SweepClockwise && sweepAngle > 0)
{
// If we want to go CCW, sweepAngle needs to be negative
sweepAngle -= 360.0f;
}
path.AddArc(Conversions.GetRectangleF(rect), startAngle, sweepAngle);
position = p;
bb.Add(p);
continue;
}
var ct = op as CurveTo;
if (ct != null)
{
var p = ct.Point;
var c1 = ct.Control1;
var c2 = ct.Control2;
path.AddBezier(Conversions.GetPointF(position), Conversions.GetPointF(c1),
Conversions.GetPointF(c2), Conversions.GetPointF(p));
position = p;
bb.Add(p);
bb.Add(c1);
bb.Add(c2);
continue;
}
var cp = op as ClosePath;
if (cp != null)
{
path.CloseFigure();
continue;
}
throw new NotSupportedException("Path Op " + op);
}
var frame = bb.BoundingBox;
if (brush != null)
{
graphics.FillPath(brush.GetBrush(frame), path);
}
if (pen != null)
{
graphics.DrawPath(pen.GetPen(), path);
}
}
}
public void DrawPath(IEnumerable <PathOp> ops, Pen pen = null, Brush brush = null)
{
using (var path = new GraphicsPath()) {
var bb = new BoundingBoxBuilder();
var position = Point.Zero;
foreach (var op in ops)
{
var mt = op as MoveTo;
if (mt != null)
{
var p = mt.Point;
position = p;
bb.Add(p);
continue;
}
var lt = op as LineTo;
if (lt != null)
{
var p = lt.Point;
path.AddLine(Conversions.GetPointF(position), Conversions.GetPointF(p));
position = p;
bb.Add(p);
continue;
}
var at = op as ArcTo;
if (at != null)
{
var p = at.Point;
path.AddLine(Conversions.GetPointF(position), Conversions.GetPointF(p));
position = p;
bb.Add(p);
continue;
}
var ct = op as CurveTo;
if (ct != null)
{
var p = ct.Point;
var c1 = ct.Control1;
var c2 = ct.Control2;
path.AddBezier(Conversions.GetPointF(position), Conversions.GetPointF(c1),
Conversions.GetPointF(c2), Conversions.GetPointF(p));
position = p;
bb.Add(p);
bb.Add(c1);
bb.Add(c2);
continue;
}
var cp = op as ClosePath;
if (cp != null)
{
path.CloseFigure();
continue;
}
throw new NotSupportedException("Path Op " + op);
}
var frame = bb.BoundingBox;
if (brush != null)
{
graphics.FillPath(brush.GetBrush(frame), path);
}
if (pen != null)
{
var r = Conversions.GetRectangleF(frame);
graphics.DrawPath(pen.GetPen(), path);
}
}
}
