private void AddStroke(int x, int y)
{
allPoints.Add(new GpPointF(x, y));
if ( allPoints.Count == 1 )
return;
path.AddLine(allPoints[allPoints.Count - 2], allPoints[allPoints.Count - 1]);
using (Graphics graphics = CreateGraphics())
{
IntPtr hdc = graphics.GetHdc();
using (GraphicsPlus g = new GraphicsPlus(hdc))
{
SmoothingMode mode = g.GetSmoothingMode();
g.SetSmoothingMode(SmoothingMode.SmoothingModeAntiAlias);
g.DrawLine(penWrite, allPoints[allPoints.Count - 2], allPoints[allPoints.Count - 1]);
g.SetSmoothingMode(mode);
}
graphics.ReleaseHdc(hdc);
}
}
private void Draw(Graphics graphics, GraphicsPlus g)
{
StringFormat sf = new StringFormat();
sf.LineAlignment = sf.Alignment = System.Drawing.StringAlignment.Center;
int deltaH = ClientRectangle.Height / 8;
GpRectF rc = new GpRectF(0, 0, ClientRectangle.Width, deltaH);
RectangleF rcf = new RectangleF(0, 0, ClientRectangle.Width, deltaH);
using (SolidBrush brText = new SolidBrush(Color.Black))
using (Font fnt = new Font("Tahoma", 9, System.Drawing.FontStyle.Bold))
{
penSolid.SetWidth(15);
g.DrawLine(penSolid, 5, rcf.Top + 10, rc.Width - 10, rcf.Top + 10);
graphics.DrawString("Solid with caps", fnt, brText, rcf, sf);
rcf.Y += deltaH; rc.Offset(0, deltaH);
SmoothingMode mode = g.GetSmoothingMode();
g.SetSmoothingMode(SmoothingMode.SmoothingModeAntiAlias);
penSolid.SetColor(Color.Blue);
g.DrawLine(penSolid, 5, rcf.Top + 10, rc.Width - 10, rcf.Top + 10);
graphics.DrawString("Solid with caps and anitalising", fnt, brText, rcf, sf);
rcf.Y += deltaH; rc.Offset(0, deltaH);
g.DrawLine(penHatch, 5, rcf.Top + 10, rc.Width - 10, rcf.Top + 10);
graphics.DrawString("Hatched", fnt, brText, rcf, sf);
rcf.Y += deltaH; rc.Offset(0, deltaH);
penSolidTrans.SetWidth(20);
penSolidTrans.SetLineCap(LineCap.LineCapRound, LineCap.LineCapDiamondAnchor, DashCap.DashCapRound);
graphics.DrawString("Solid with transparency", fnt, brText, rcf, sf);
g.DrawLine(penSolidTrans, 15, rcf.Top + 10, rc.Width - 30, rcf.Top + 10);
rcf.Y += deltaH; rc.Offset(0, deltaH);
g.SetSmoothingMode(SmoothingMode.SmoothingModeAntiAlias);
brText.Color = Color.White;
g.DrawLine(penSolidCustomCap, 15, rcf.Top + 15, rc.Width - 50, rcf.Top + 15);
graphics.DrawString("Custom cap", fnt, brText, rcf, sf);
rcf.Y += deltaH; rc.Offset(0, deltaH);
g.SetSmoothingMode(mode);
brText.Color = Color.Gray;
g.DrawLine(penDash, 5, rcf.Top + 10, rc.Width - 10, rcf.Top + 10);
graphics.DrawString("Dash (round)", fnt, brText, rcf, sf);
rcf.Y += deltaH; rc.Offset(0, deltaH);
brText.Color = Color.White;
g.DrawLine(penGradient, 15, rcf.Top + 20, rc.Width - 30, rcf.Top + 20);
graphics.DrawString("Gradient brush-based", fnt, brText, rcf, sf);
rcf.Y += deltaH; rc.Offset(0, deltaH);
}
}
private void TestGdiPlus(GraphicsPlus graphics)
{
graphics.DrawImage(bmp, 0, 0, ClientRectangle.Width, ClientRectangle.Height);
PenPlus pen;
graphics.SetSmoothingMode(SmoothingMode.SmoothingModeAntiAlias);
pen= new PenPlus(Color.Black, 15);
pen.SetEndCap(LineCap.LineCapRound);
pen.SetStartCap(LineCap.LineCapRound);
pen.SetWidth(3);
pen.SetColor(Color.FromArgb(0x7f7f7f7f));
pen.SetWidth(40);
graphics.DrawLine(pen, 20, 20, ClientRectangle.Right - 20, ClientRectangle.Bottom - 20);
graphics.DrawLine(pen, ClientRectangle.Right - 20, 20, 20, ClientRectangle.Bottom - 20);
SmoothingMode mode = graphics.GetSmoothingMode();
graphics.SetSmoothingMode(SmoothingMode.SmoothingModeAntiAlias);
foreach(GraphicsPath p in allPaths)
graphics.DrawPath(penWrite, p);
graphics.SetSmoothingMode(mode);
pen.Dispose();
}
