public LinearLineSegment PolygonToDrawingLine(Geometry place, GeoArea drawingArea, double resolutionX, double resolutionY)
{
//NOTE: this doesn't handle holes if you add them to the end in the reverse order. Those must be handled by a function in ImageSharp.
var typeConvertedPoints = place.Coordinates.Select(o => new SixLabors.ImageSharp.PointF((float)((o.X - drawingArea.WestLongitude) * (1 / resolutionX)), (float)((o.Y - drawingArea.SouthLatitude) * (1 / resolutionY))));
LinearLineSegment part = new LinearLineSegment(typeConvertedPoints.ToArray());
var x = new SixLabors.ImageSharp.Drawing.Path();
return(part);
}
private void DrawLine(params PointF[] segments)
{
var prev = segments.First();
var path = new Path(segments.Skip(1).Select(p => {
var segment = new LinearLineSegment(prev, p);
prev = p;
return(segment);
}));
drawables.Add(new PathDrawer {
Path = path
});
}
public IPath PolygonToDrawingPolygon(Geometry place, GeoArea drawingArea, double resolutionX, double resolutionY)
{
var lineSegmentList = new List <LinearLineSegment>();
NetTopologySuite.Geometries.Polygon p = (NetTopologySuite.Geometries.Polygon)place;
var typeConvertedPoints = p.ExteriorRing.Coordinates.Select(o => new SixLabors.ImageSharp.PointF((float)((o.X - drawingArea.WestLongitude) * (1 / resolutionX)), (float)((o.Y - drawingArea.SouthLatitude) * (1 / resolutionY))));
var path = new SixLabors.ImageSharp.Drawing.Path(new LinearLineSegment(typeConvertedPoints.ToArray())).AsClosedPath();
foreach (var hole in p.InteriorRings)
{
typeConvertedPoints = hole.Coordinates.Select(o => new SixLabors.ImageSharp.PointF((float)((o.X - drawingArea.WestLongitude) * (1 / resolutionX)), (float)((o.Y - drawingArea.SouthLatitude) * (1 / resolutionY))));
var tempHole = new SixLabors.ImageSharp.Drawing.Path(new LinearLineSegment(typeConvertedPoints.ToArray())).AsClosedPath();
path = path.Clip(tempHole);
}
return(path);
}
public byte[] GenerateImage(out string code, int codeLength = 4)
{
//验证码
code = RandomTool.CreatRandom58String(codeLength);
var random = new Random();
//验证码颜色集合
Color[] colorArray =
{
Color.Black,
Color.Red,
Color.DarkBlue,
Color.Green,
Color.Orange,
Color.Brown,
Color.DarkCyan,
Color.Purple,
Color.Yellow,
Color.Cyan
};
//验证码字体集合
string[] fonts = { "fonts/Apalu-2.ttf",
"fonts/Arvo-Italic.ttf",
"fonts/brelaregular.ttf",
"fonts/ColorTube-2.ttf",
"fonts/LeagueGothic-Italic.ttf",
"fonts/Quantum-2.ttf" };
var width = code.Length * 40;
var height = 64;
byte[] buffer = null;
using (MemoryStream ms = new MemoryStream())
using (Image image = new Image <Rgba32>(width, height, Color.White))
{
//绘制干扰线条
for (int i = 0; i < 2; i++)
{
var cindex = random.Next(9);//随机颜色索引值
int x1 = random.Next(image.Width);
int y1 = random.Next(image.Height);
int x2 = random.Next(image.Width);
int y2 = random.Next(image.Height);
int x3 = random.Next(image.Width);
int y3 = random.Next(image.Height);
int x4 = random.Next(image.Width);
int y4 = random.Next(image.Height);
int x5 = random.Next(image.Width);
int y5 = random.Next(image.Height);
var thickness = random.Next(2, 4);
var linerSegemnt = new LinearLineSegment(
new Vector2(x1, y1),
new Vector2(x2, y2),
new Vector2(x3, y3),
new Vector2(x4, y4),
new Vector2(x5, y5)
);
var color = colorArray[cindex];
var p = new SixLabors.ImageSharp.Drawing.Path(linerSegemnt);
image.Mutate(x => x.Draw(color, thickness, p));
}
//绘制文字
for (int i = 0; i < code.Length; i++)
{
var cindex = random.Next(7); //随机颜色索引值
var findex = random.Next(6); //随机字体索引值
var fontSize = random.Next(35, 50);
FontCollection collection = new();
FontFamily family = collection.Add(fonts[findex]);
Font font = family.CreateFont(fontSize);
Color selectColor = colorArray[cindex];
//产生一个轻微的抖动
int shakeX = random.Next(-5, 15);
int shakeY = random.Next(-5, 25);
float x = 3 + (i * 30) + shakeX; //x坐标
float y = 0 + shakeY; //Y坐标
string character = code.Substring(i, 1); //绘制的字符
image.Mutate(opera => opera.DrawText(character, font, selectColor, new PointF(x, y)));
}
//在随机位置画背景点
for (int i = 0; i < 5; i++)
{
var cindex = random.Next(7);//随机颜色索引值
int x = random.Next(image.Width);
int y = random.Next(image.Height);
}
//绘制干扰点
for (int i = 0; i < 40; i++)
{
var cindex = random.Next(7);//随机颜色索引值
int x = random.Next(image.Width);
int y = random.Next(image.Height);
var rectangle = new Rectangle(x, y, 1, 1);
var coloer = colorArray[cindex];
image.Mutate(x => x.Draw(coloer, 4f, rectangle));
}
image.SaveAsBmp(ms);
buffer = ms.ToArray();
}
return(buffer);
}
public Task <RGBPixel[, ]> GenPattern(ulong frame)
{
Color fb = this.Farbe;
// Male nächste Iteration ins malbild.
switch (this.Art)
{
case LinienTyp.Kreuz:
{
ulong w = (ulong)(frame * Geschwindigkeit) % 100;
double wr = w / 100d * Math.PI;
double ph = 2 * Math.PI / Anzahl;
PointF mp = new PointF(sizex / 2f, sizey / 2f);
_malbild.Mutate((IImageProcessingContext i) =>
{
try
{
i.Fill(Color.Black);
for (int l = 0; l < this.Anzahl; l++)
{
PointF pointF = new PointF(mp.X + (float)Math.Cos(wr + ph * l) * sizex, mp.Y + (float)Math.Sin(wr + ph * l) * sizey);
i.DrawLines(new ShapeGraphicsOptions()
{
GraphicsOptions = { Antialias = false }
}, fb, this.N,
mp, pointF);
}
}
catch (Exception e)
{
//HACK, TODO, geht nicht, wegen Bug in Bib.
}
});
}
break;
case LinienTyp.Raute:
{
float w = 0.01f * ((ulong)(frame * Geschwindigkeit) % 100);
_malbild.Mutate(i =>
{
i.Clear(Color.Black);
i.DrawLines(new ShapeGraphicsOptions()
{
GraphicsOptions = { Antialias = false }
}, fb, this.N,
new PointF(sizex * w, 0),
new PointF(sizex, sizey * w),
new PointF(sizex * (1 - w), sizey),
new PointF(0, sizey * (1 - w)),
new PointF(sizex * w, 0));
});
}
break;
default:
case LinienTyp.RadarLR:
case LinienTyp.RadarRL:
{
ulong koo = (ulong)(frame * Geschwindigkeit) % sizex;
koo = (this.Art == LinienTyp.RadarRL)? sizex - koo - 1 : koo;
_malbild.Mutate(i =>
{
i.Clear(Color.Black);
i.DrawLines(new ShapeGraphicsOptions()
{
GraphicsOptions = { Antialias = false }
},
fb, this.N, new PointF((float)koo, 0), new PointF((float)koo, sizey - 1));
});
}
break;
case LinienTyp.RadarRLR:
{
ulong koo = (ulong)(frame * Geschwindigkeit) % (sizex * 2);
koo = (koo >= sizex)? sizex - (koo % sizex) - 1 : koo % sizex;
ILineSegment s = new LinearLineSegment(new PointF((float)koo, 0), new PointF((float)koo, sizey - 1));
IPath p = new SixLabors.ImageSharp.Drawing.Path(s);
_malbild.Mutate(i =>
{
i.Clear(Color.Black);
i.Draw(new ShapeGraphicsOptions()
{
GraphicsOptions = { Antialias = false }
},
fb, N, p);
});
}
break;
case LinienTyp.RadarVO:
case LinienTyp.RadarOV:
case LinienTyp.RadarVOV:
throw new NotImplementedException();
break;
}
// Recycle deinen Puffer und übertrage das Bild dahin.
for (int x = 0; x < sizex; x++)
{
for (int y = 0; y < sizey; y++)
{
var pxl = _malbild[x, y];
pbuf[x, y] = new RGBPixel(pxl.R, pxl.G, pxl.B);
}
}
if (this.Farbwechsel)
{
HSVPixel h = this.Farbe;
h.H += 1;
this.Farbe = h;
}
return(Task.FromResult(pbuf));
}
