public SkiaSharp.SKPoint PlaceInfoToSKPoint(PraxisCore.StandaloneDbTables.PlaceInfo2 pi, ImageStats imgstats)
{
SkiaSharp.SKPoint point = new SkiaSharp.SKPoint();
point.X = (float)((pi.lonCenter - imgstats.area.WestLongitude) * (1 / imgstats.degreesPerPixelX));
point.Y = (float)((pi.latCenter - imgstats.area.SouthLatitude) * (1 / imgstats.degreesPerPixelY));
return(point);
}
public static SKShader CreateLinearGradient (SKPoint start, SKPoint end, SKColor [] colors, float [] colorPos, SKShaderTileMode mode, SKMatrix localMatrix)
{
if (colors == null)
throw new ArgumentNullException (nameof (colors));
if (colorPos == null) {
return GetObject<SKShader> (SkiaApi.sk_shader_new_linear_gradient (new SKPoint [] { start, end }, colors, IntPtr.Zero, colors.Length, mode, ref localMatrix));
} else {
if (colors.Length != colorPos.Length)
throw new ArgumentException ("The number of colors must match the number of color positions.");
return GetObject<SKShader> (SkiaApi.sk_shader_new_linear_gradient (new SKPoint [] { start, end }, colors, colorPos, colors.Length, mode, ref localMatrix));
}
}
public SkiaSharp.SKPoint[] PlaceInfoToSKPoints(PraxisCore.StandaloneDbTables.PlaceInfo2 pi, ImageStats info)
{
float heightMod = (float)pi.height / 2;
float widthMod = (float)pi.width / 2;
var points = new SkiaSharp.SKPoint[5];
points[0] = new SkiaSharp.SKPoint((float)(pi.lonCenter + widthMod), (float)(pi.latCenter + heightMod)); //upper right corner
points[1] = new SkiaSharp.SKPoint((float)(pi.lonCenter + widthMod), (float)(pi.latCenter - heightMod)); //lower right
points[2] = new SkiaSharp.SKPoint((float)(pi.lonCenter - widthMod), (float)(pi.latCenter - heightMod)); //lower left
points[3] = new SkiaSharp.SKPoint((float)(pi.lonCenter - widthMod), (float)(pi.latCenter + heightMod)); //upper left
points[4] = new SkiaSharp.SKPoint((float)(pi.lonCenter + widthMod), (float)(pi.latCenter + heightMod)); //upper right corner again for a closed shape.
//points is now a geometric area. Convert to image area
points = points.Select(p => new SkiaSharp.SKPoint((float)((p.X - info.area.WestLongitude) * (1 / info.degreesPerPixelX)), (float)((p.Y - info.area.SouthLatitude) * (1 / info.degreesPerPixelY)))).ToArray();
return(points);
}
void DrawArcFromTo (SKCanvas canvas, SKPaint paint, int xc, int yc, int radius,
float startAngleInDegrees, float endAngleInDegrees)
{
if (radius <= 0)
return;
int x = radius;
int y = 0;
int cd2 = 0;
// convert degrees to radians
var startAngleRadians = startAngleInDegrees * Math.PI / 180;
var endAngleRadians = endAngleInDegrees * Math.PI / 180;
// find x,y coordinates for start and end points
var startx = xc + radius * (float)Math.Cos (startAngleRadians);
var starty = yc + radius * (float)Math.Sin (startAngleRadians);
var startPoint = new SKPoint (startx, starty);
var endx = xc + radius * (float)Math.Cos (endAngleRadians);
var endy = yc + radius * (float)Math.Sin (endAngleRadians);
var endPoint = new SKPoint (endx, endy);
// build the path
var points = new List<SKPoint> ();
// 4 cardinal points
var p00 = new SKPoint (xc - radius, yc);
var ap00 = Math.Atan2 (p00.Y - yc, p00.X - xc) * 180 / Math.PI;
if (IsAngleBetween ((int)ap00, (int)startAngleInDegrees, (int)endAngleInDegrees))
points.Add (p00);
var p01 = new SKPoint (xc + radius, yc);
var ap01 = Math.Atan2 (p01.Y - yc, p01.X - xc) * 180 / Math.PI;
if (IsAngleBetween ((int)ap01, (int)startAngleInDegrees, (int)endAngleInDegrees))
points.Add (p01);
var p02 = new SKPoint (xc, yc - radius);
var ap02 = Math.Atan2 (p02.Y - yc, p02.X - xc) * 180 / Math.PI;
if (IsAngleBetween ((int)ap02, (int)startAngleInDegrees, (int)endAngleInDegrees))
points.Add (p02);
var p03 = new SKPoint (xc, yc + radius);
var ap03 = Math.Atan2 (p03.Y - yc, p03.X - xc) * 180 / Math.PI;
if (IsAngleBetween ((int)ap03, (int)startAngleInDegrees, (int)endAngleInDegrees))
points.Add (p03);
while (x > y)
{
x--;
y++;
cd2 -= x - y;
if (cd2 < 0)
cd2 += x++;
// 8 octants - listed clockwise
// right hemisphere, starting at the top
var p0 = new SKPoint (xc + y, yc - x);
var arp0 = Math.Atan2 (p0.Y - yc, p0.X - xc) * 180 / Math.PI;
if (IsAngleBetween ((int)arp0, (int)startAngleInDegrees, (int)endAngleInDegrees))
points.Add (p0);
var p1 = new SKPoint (xc + x, yc - y);
var arp1 = Math.Atan2 (p1.Y - yc, p1.X - xc) * 180 / Math.PI;
if (IsAngleBetween ((int)arp1, (int)startAngleInDegrees, (int)endAngleInDegrees))
points.Add (p1);
var p2 = new SKPoint (xc + x, yc + y);
var arp2 = Math.Atan2 (p2.Y - yc, p2.X - xc) * 180 / Math.PI;
if (IsAngleBetween ((int)arp2, (int)startAngleInDegrees, (int)endAngleInDegrees))
points.Add (p2);
var p3 = new SKPoint (xc + y, yc + x);
var arp3 = Math.Atan2 (p3.Y - yc, p3.X - xc) * 180 / Math.PI;
if (IsAngleBetween ((int)arp3, (int)startAngleInDegrees, (int)endAngleInDegrees))
points.Add (p3);
// left hemisphere, continuing around from the bottom
var p4 = new SKPoint (xc - y, yc + x);
var arp4 = Math.Atan2 (p4.Y - yc, p4.X - xc) * 180 / Math.PI;
if (IsAngleBetween ((int)arp4, (int)startAngleInDegrees, (int)endAngleInDegrees))
points.Add (p4);
var p5 = new SKPoint (xc - x, yc + y);
var arp5 = Math.Atan2 (p5.Y - yc, p5.X - xc) * 180 / Math.PI;
if (IsAngleBetween ((int)arp5, (int)startAngleInDegrees, (int)endAngleInDegrees))
points.Add (p5);
var p6 = new SKPoint (xc - x, yc - y);
var arp6 = Math.Atan2 (p6.Y - yc, p6.X - xc) * 180 / Math.PI;
if (IsAngleBetween ((int)arp6, (int)startAngleInDegrees, (int)endAngleInDegrees))
points.Add (p6);
var p7 = new SKPoint (xc - y, yc - x);
var arp7 = Math.Atan2 (p7.Y - yc, p7.X - xc) * 180 / Math.PI;
if (IsAngleBetween ((int)arp7, (int)startAngleInDegrees, (int)endAngleInDegrees))
points.Add (p7);
}
canvas.DrawPoints (SKPointMode.Points, points.ToArray (), paint);
}
// DrawPoint
public void DrawPoint(SKPoint p, SKPaint paint)
{
DrawPoint(p.X, p.Y, paint);
}
public static SKRect Create(SKPoint location, SKSize size)
{
return SKRect.Create(location.X, location.Y, size.Width, size.Height);
}
public static SKPointI Truncate(SKPoint value)
{
int x, y;
checked
{
x = (int)value.X;
y = (int)value.Y;
}
return new SKPointI(x, y);
}
public static SKPoint Add(SKPoint pt, SKPoint sz) => pt + sz;
public void Scale(SKPoint size)
{
SkiaApi.sk_canvas_scale (Handle, size.X, size.Y);
}
public bool GetTangent (float distance, out SKPoint tangent)
{
return SkiaApi.sk_pathmeasure_get_pos_tan (Handle, distance, IntPtr.Zero, out tangent);
}
public void DrawText(byte[] text, SKPoint p, SKPaint paint)
{
DrawText(text, p.X, p.Y, paint);
}
// DrawText
public void DrawText(string text, SKPoint p, SKPaint paint)
{
DrawText(text, p.X, p.Y, paint);
}
// DrawSurface
public void DrawSurface(SKSurface surface, SKPoint p, SKPaint paint = null)
{
DrawSurface(surface, p.X, p.Y, paint);
}
// DrawBitmap
public void DrawBitmap(SKBitmap bitmap, SKPoint p, SKPaint paint = null)
{
DrawBitmap(bitmap, p.X, p.Y, paint);
}
public void DrawPicture(SKPicture picture, SKPoint p, SKPaint paint = null)
{
DrawPicture(picture, p.X, p.Y, paint);
}
// DrawImage
public void DrawImage(SKImage image, SKPoint p, SKPaint paint = null)
{
DrawImage(image, p.X, p.Y, paint);
}
public void DrawPoint(SKPoint p, SKColor color)
{
DrawPoint(p.X, p.Y, color);
}
/// <summary>
/// Creates a matrix that rotates about a specified center.
/// </summary>
/// <param name="angle">Angle of rotation in radians.</param>
/// <param name="center">The center of the rotation.</param>
/// <returns>The created rotation matrix.</returns>
public static SKMatrix Rotation(double angle, SKPoint center)
{
return Multiply(
Multiply(
Translate(-center.X, -center.Y),
Rotation(angle)),
Translate(center.X, center.Y));
}
public bool GetPositionAndTangent (float distance, out SKPoint position, out SKPoint tangent)
{
return SkiaApi.sk_pathmeasure_get_pos_tan (Handle, distance, out position, out tangent);
}
public void DrawText(IntPtr buffer, int length, SKPoint p, SKPaint paint)
{
DrawText(buffer, length, p.X, p.Y, paint);
}
public void DrawText(string text, SKPoint [] points, SKPaint paint)
{
if (text == null)
throw new ArgumentNullException ("text");
if (paint == null)
throw new ArgumentNullException (nameof (paint));
if (points == null)
throw new ArgumentNullException ("points");
var bytes = Util.GetEncodedText (text, paint.TextEncoding);
SkiaApi.sk_canvas_draw_pos_text (Handle, bytes, bytes.Length, points, paint.Handle);
}
// DrawTextOnPath
public void DrawTextOnPath(string text, SKPath path, SKPoint offset, SKPaint paint)
{
DrawTextOnPath(text, path, offset, true, paint);
}
public void Translate(SKPoint point)
{
SkiaApi.sk_canvas_translate (Handle, point.X, point.Y);
}
// DrawLine
public void DrawLine(SKPoint p0, SKPoint p1, SKPaint paint)
{
DrawLine(p0.X, p0.Y, p1.X, p1.Y, paint);
}
public static SKPointI Ceiling(SKPoint value)
{
int x, y;
checked
{
x = (int)Math.Ceiling(value.X);
y = (int)Math.Ceiling(value.Y);
}
return new SKPointI(x, y);
}
public void DrawTextOnPath(byte[] text, SKPath path, SKPoint offset, SKPaint paint)
{
DrawTextOnPath(text, path, offset.X, offset.Y, paint);
}
public bool Contains(SKPoint pt)
{
return Contains(pt.X, pt.Y);
}
public void DrawTextOnPath(IntPtr buffer, int length, SKPath path, SKPoint offset, SKPaint paint)
{
DrawTextOnPath(buffer, length, path, offset.X, offset.Y, paint);
}
public void MapVectors(SKPoint[] result, SKPoint[] vectors)
{
if (result == null)
throw new ArgumentNullException(nameof(result));
if (vectors == null)
throw new ArgumentNullException(nameof(vectors));
int dl = result.Length;
if (dl != vectors.Length)
throw new ArgumentException("Buffers must be the same size.");
unsafe
{
fixed (SKPoint* rp = &result[0])
{
fixed (SKPoint* pp = &vectors[0])
{
SkiaApi.sk_matrix_map_vectors(ref this, (IntPtr)rp, (IntPtr)pp, dl);
}
}
}
}
public void DrawNamedDestinationAnnotation(SKPoint point, SKData value)
{
SkiaApi.sk_canvas_draw_named_destination_annotation(Handle, &point, value == null ? IntPtr.Zero : value.Handle);
}
static SKPoint RotatePoint (SKPoint pointToRotate, SKPoint centerPoint, double angleInDegrees)
{
double angleInRadians = angleInDegrees * (Math.PI / 180);
double cosTheta = Math.Cos (angleInRadians);
double sinTheta = Math.Sin (angleInRadians);
return new SKPoint
{
X =
(int)
(cosTheta * (pointToRotate.X - centerPoint.X) -
sinTheta * (pointToRotate.Y - centerPoint.Y) + centerPoint.X),
Y =
(int)
(sinTheta * (pointToRotate.X - centerPoint.X) +
cosTheta * (pointToRotate.Y - centerPoint.Y) + centerPoint.Y)
};
}
public SKImage ApplyImageFilter(SKImageFilter filter, SKRectI subset, SKRectI clipBounds, out SKRectI outSubset, out SKPoint outOffset)
{
if (filter == null)
{
throw new ArgumentNullException(nameof(filter));
}
return(GetObject <SKImage> (SkiaApi.sk_image_make_with_filter(Handle, filter.Handle, ref subset, ref clipBounds, out outSubset, out outOffset)));
}
void DrawArc (SKCanvas canvas, SKPaint paint, double startAngleInDegrees, double endAngleInDegrees)
{
// find center and radius
var centerx = (float)Bounds.Width / 2;
var centery = (float)Bounds.Height / 2;
var radius = Bounds.Width < Bounds.Height ? (float)Bounds.Width / 2 : (float)Bounds.Height / 2;
var w = 0.558f;
// convert degrees to radians
var startAngleRadians = startAngleInDegrees * Math.PI / 180;
var endAngleRadians = endAngleInDegrees * Math.PI / 180;
// find x,y coordinates for start and end points
var startx = centerx + radius * (float)Math.Cos (startAngleRadians);
var starty = centery + radius * (float)Math.Sin (startAngleRadians);
var startPoint = new SKPoint (startx, starty);
var endx = centerx + radius * (float)Math.Cos (endAngleRadians);
var endy = centery + radius * (float)Math.Sin (endAngleRadians);
var endPoint = new SKPoint (endx, endy);
// find linear distance & midpoint between start and end points
var linearDistance = Math.Sqrt(Math.Pow(endy - starty, 2) / Math.Pow(endx - startx, 2));
var midx = (startx + endx) / 2;
var midy = (starty + endy) / 2;
var midPoint = new SKPoint (midx, midy);
// rotate end point 45 degrees counterclockwise around midpoint to find Conic function anchor
var anchorPoint = RotatePoint (endPoint, midPoint, 45);
// build path
var path = new SKPath ();
//path.MoveTo (startx, starty);
//path.ConicTo (anchorPoint.X, anchorPoint.Y, endx, endy, w);
path.MoveTo (centerx, centery - radius);
path.ConicTo (centerx + radius, centery - radius, centerx + radius, centery, w);
path.ConicTo (centerx + radius, centery + radius, centerx, centery + radius, w);
path.ConicTo (centerx - radius, centery + radius, centerx - radius, centery, w);
//path.ConicTo (centerx - radius, centery - radius, centerx, centery - radius, w);
//canvas.DrawPoints (SKPointMode.Points, new SKPoint [] { }, paint);
canvas.DrawPath (path, paint);
}
public void Skew(SKPoint skew)
{
SkiaApi.sk_canvas_skew(Handle, skew.X, skew.Y);
}
/// <summary>
/// Transforms a point by this matrix.
/// </summary>
/// <param name="matrix">The matrix to use as a transformation matrix.</param>
/// <param name="point">>The original point to apply the transformation.</param>
/// <returns>The result of the transformation for the input point.</returns>
public static SKPoint TransformPoint(SKMatrix matrix, SKPoint point)
{
return new SKPoint(
(point.X * matrix.ScaleX) + (point.Y * matrix.SkewX) + matrix.TransX,
(point.X * matrix.SkewY) + (point.Y * matrix.ScaleY) + matrix.TransY);
}
public static SKPoint Add(SKPoint pt, SKSize sz)
{
return(new SKPoint(pt.X + sz.Width, pt.Y + sz.Height));
}
public bool GetPosition (float distance, out SKPoint position)
{
return SkiaApi.sk_pathmeasure_get_pos_tan (Handle, distance, out position, IntPtr.Zero);
}
public static SKPoint Subtract(SKPoint pt, SKSize sz)
{
return(new SKPoint(pt.X - sz.Width, pt.Y - sz.Height));
}
public void DrawPoints(SKPointMode mode, SKPoint [] points, SKPaint paint)
{
if (paint == null)
throw new ArgumentNullException (nameof (paint));
if (points == null)
throw new ArgumentNullException (nameof (points));
SkiaApi.sk_canvas_draw_points (Handle, mode, (IntPtr)points.Length, points, paint.Handle);
}
public static SKShader CreateTwoPointConicalGradient(SKPoint start, float startRadius, SKPoint end, float endRadius, SKColor [] colors, float [] colorPos, SKShaderTileMode mode, SKMatrix localMatrix)
{
if (colors == null)
{
throw new ArgumentNullException(nameof(colors));
}
if (colorPos == null)
{
return(GetObject <SKShader> (SkiaApi.sk_shader_new_two_point_conical_gradient(ref start, startRadius, ref end, endRadius, colors, IntPtr.Zero, colors.Length, mode, ref localMatrix)));
}
else
{
if (colors.Length != colorPos.Length)
{
throw new ArgumentException("The number of colors must match the number of color positions.");
}
return(GetObject <SKShader> (SkiaApi.sk_shader_new_two_point_conical_gradient(ref start, startRadius, ref end, endRadius, colors, colorPos, colors.Length, mode, ref localMatrix)));
}
}
public void DrawText(IntPtr buffer, int length, SKPoint[] points, SKPaint paint)
{
if (buffer == IntPtr.Zero)
throw new ArgumentNullException ("buffer");
if (paint == null)
throw new ArgumentNullException (nameof (paint));
if (points == null)
throw new ArgumentNullException ("points");
SkiaApi.sk_canvas_draw_pos_text (Handle, buffer, length, points, paint.Handle);
}
public SKPoint MapPoint(SKPoint point)
{
return(MapPoint(point.X, point.Y));
}
public void Skew(SKPoint skew)
{
SkiaApi.sk_canvas_skew (Handle, skew.X, skew.Y);
}
public void Offset(SKPoint p)
{
x += p.x;
y += p.y;
}
public void Offset(SKPoint p)
{
Offset(p.X, p.Y);
}
public SKSize(SKPoint pt)
{
w = pt.X;
h = pt.Y;
}
public static SKPoint Subtract(SKPoint pt, SKPoint sz) => pt - sz;
public static SKPoint Add(SKPoint pt, SKPoint sz) => pt + sz;
public static SKPointI Round(SKPoint value)
{
int x, y;
checked
{
x = (int)Math.Round(value.X);
y = (int)Math.Round(value.Y);
}
return new SKPointI(x, y);
}
public static SKPoint Subtract(SKPoint pt, SKPoint sz) => pt - sz;
public SKSize(SKPoint pt)
{
this.width = pt.X;
this.height = pt.Y;
}
public void Translate(SKPoint point)
{
SkiaApi.sk_canvas_translate(Handle, point.X, point.Y);
}
public void Offset(SKPoint pos)
{
Offset(pos.X, pos.Y);
}
public void Scale(SKPoint size)
{
SkiaApi.sk_canvas_scale(Handle, size.X, size.Y);
}
public SKPoint[] MapPoints(SKPoint[] points)
{
if (points == null)
throw new ArgumentNullException(nameof(points));
var res = new SKPoint[points.Length];
MapPoints(res, points);
return res;
}
public SKPoint MapPoint(SKPoint point)
{
return MapPoint(point.X, point.Y);
}
public SKPoint[] MapVectors(SKPoint[] vectors)
{
if (vectors == null)
throw new ArgumentNullException(nameof(vectors));
var res = new SKPoint[vectors.Length];
MapVectors(res, vectors);
return res;
}
public void DrawCircle(SKPoint c, float radius, SKPaint paint)
{
DrawCircle(c.X, c.Y, radius, paint);
}
internal void Draw(DrawingContextImpl context,
SKCanvas canvas, SKPoint origin,
DrawingContextImpl.PaintWrapper foreground)
{
/* TODO: This originated from Native code, it might be useful for debugging character positions as
* we improve the FormattedText support. Will need to port this to C# obviously. Rmove when
* not needed anymore.
SkPaint dpaint;
ctx->Canvas->save();
ctx->Canvas->translate(origin.fX, origin.fY);
for (int c = 0; c < Lines.size(); c++)
{
dpaint.setARGB(255, 0, 0, 0);
SkRect rc;
rc.fLeft = 0;
rc.fTop = Lines[c].Top;
rc.fRight = Lines[c].Width;
rc.fBottom = rc.fTop + LineOffset;
ctx->Canvas->drawRect(rc, dpaint);
}
for (int c = 0; c < Length; c++)
{
dpaint.setARGB(255, c % 10 * 125 / 10 + 125, (c * 7) % 10 * 250 / 10, (c * 13) % 10 * 250 / 10);
dpaint.setStyle(SkPaint::kFill_Style);
ctx->Canvas->drawRect(Rects[c], dpaint);
}
ctx->Canvas->restore();
*/
SKPaint paint = _paint;
IDisposable currd = null;
var currentWrapper = foreground;
try
{
SKPaint currFGPaint = ApplyWrapperTo(ref foreground, ref currd, paint);
bool hasCusomFGBrushes = _foregroundBrushes.Any();
for (int c = 0; c < _skiaLines.Count; c++)
{
AvaloniaFormattedTextLine line = _skiaLines[c];
float x = TransformX(origin.X, 0, paint.TextAlign);
if (!hasCusomFGBrushes)
{
var subString = _text.Substring(line.Start, line.Length);
canvas.DrawText(subString, x, origin.Y + line.Top + _lineOffset, paint);
}
else
{
float currX = x;
string subStr;
int len;
for (int i = line.Start; i < line.Start + line.Length;)
{
var fb = GetNextForegroundBrush(ref line, i, out len);
if (fb != null)
{
//TODO: figure out how to get the brush size
currentWrapper = context.CreatePaint(fb, new Size());
}
else
{
if (!currentWrapper.Equals(foreground)) currentWrapper.Dispose();
currentWrapper = foreground;
}
subStr = _text.Substring(i, len);
if (currFGPaint != currentWrapper.Paint)
{
currFGPaint = ApplyWrapperTo(ref currentWrapper, ref currd, paint);
}
canvas.DrawText(subStr, currX, origin.Y + line.Top + _lineOffset, paint);
i += len;
currX += paint.MeasureText(subStr);
}
}
}
}
finally
{
if (!currentWrapper.Equals(foreground)) currentWrapper.Dispose();
currd?.Dispose();
}
}
} // End Function LoadImage
private void DrawImage()
{
int bitness = System.IntPtr.Size * 8;
System.Console.WriteLine(bitness);
// https://developer.xamarin.com/guides/cross-platform/drawing/introduction/
// https://developer.xamarin.com/api/type/SkiaSharp.SKSurface/
// https://forums.xamarin.com/discussion/77883/skiasharp-graphics-basics
// Make sure the Microsoft Visual C++ 2015 Redistributable is installed if this error occurs:
// Unable to load DLL 'libSkiaSharp.dll': The specified module could not be found.
using (SKSurface surface = SKSurface.Create(width: 640, height: 480, colorType: SKColorType.Bgra8888, alphaType: SKAlphaType.Premul))
{
SKCanvas canvas = surface.Canvas;
canvas.Clear(SKColors.Transparent);
using (SKPaint paint = new SKPaint())
{
// paint.ImageFilter = SKImageFilter.CreateBlur(5, 5); // Dispose !
paint.IsAntialias = true;
// paint.Color = new SKColor(0xff, 0x00, 0xff);
paint.Color = new SKColor(0x2c, 0x3e, 0x50);
paint.StrokeCap = SKStrokeCap.Round;
paint.Typeface = SkiaSharp.SKTypeface.FromFamilyName("Impact", SKTypefaceStyle.Bold);
paint.TextSize = 12;
canvas.DrawText("foobar", 10, 10, paint);
// SkiaSharp.SKRect rect = new SkiaSharp.SKRect();
SkiaSharp.SKRect rect = MeasureText("foobar", "Impact", 12, SKTypefaceStyle.Bold);
// paint.MeasureText("foobar", ref rect);
System.Console.WriteLine(rect);
SKRect textOverlayRectangle = new SKRect();
textOverlayRectangle.Left = 9; // x
textOverlayRectangle.Top = 10 - rect.Height; // y
textOverlayRectangle.Right = textOverlayRectangle.Left + rect.Width;
textOverlayRectangle.Bottom = textOverlayRectangle.Top + rect.Height;
// canvas.DrawRect(textOverlayRectangle, paint);
// https://chromium.googlesource.com/external/skia/+/master/experimental/SkiaExamples/HelloSkiaExample.cpp
SkiaSharp.SKPoint[] linearPoints = new SkiaSharp.SKPoint[] {
new SkiaSharp.SKPoint(0, 0),
new SkiaSharp.SKPoint(300, 300)
};
SkiaSharp.SKColor[] linearColors = new SkiaSharp.SKColor[] { SkiaSharp.SKColors.Green, SkiaSharp.SKColors.Black };
// canvas.Restore();
// canvas.Translate(100, 200);
// canvas.RotateDegrees(45);
// SKShader shader = SkiaSharp.SKShader.CreateLinearGradient(linearPoints[0], linearPoints[1], linearColors, new float[] { 1.0f, 2000.0f }, SKShaderTileMode.Repeat);
// paint.Shader = shader;
SkiaSharp.SKBitmap shaderPattern = LoadImage(MapProjectPath(@"~mytile.png"));
SKShader hatchShader = SkiaSharp.SKShader.CreateBitmap(shaderPattern, SKShaderTileMode.Mirror, SKShaderTileMode.Repeat);
paint.Shader = hatchShader;
// create the Xamagon path
using (SKPath path = new SKPath())
{
path.MoveTo(71.4311121f, 56f);
path.CubicTo(68.6763107f, 56.0058575f, 65.9796704f, 57.5737917f, 64.5928855f, 59.965729f);
path.LineTo(43.0238921f, 97.5342563f);
path.CubicTo(41.6587026f, 99.9325978f, 41.6587026f, 103.067402f, 43.0238921f, 105.465744f);
path.LineTo(64.5928855f, 143.034271f);
path.CubicTo(65.9798162f, 145.426228f, 68.6763107f, 146.994582f, 71.4311121f, 147f);
path.LineTo(114.568946f, 147f);
path.CubicTo(117.323748f, 146.994143f, 120.020241f, 145.426228f, 121.407172f, 143.034271f);
path.LineTo(142.976161f, 105.465744f);
path.CubicTo(144.34135f, 103.067402f, 144.341209f, 99.9325978f, 142.976161f, 97.5342563f);
path.LineTo(121.407172f, 59.965729f);
path.CubicTo(120.020241f, 57.5737917f, 117.323748f, 56.0054182f, 114.568946f, 56f);
path.LineTo(71.4311121f, 56f);
path.Close();
// draw the Xamagon path
canvas.DrawPath(path, paint);
} // End Using path
// ClipDeviceBounds not ClipBounds
canvas.DrawLine(0, 0, canvas.ClipDeviceBounds.Width, canvas.ClipDeviceBounds.Height, paint);
canvas.DrawLine(0, canvas.ClipDeviceBounds.Height, canvas.ClipDeviceBounds.Width, 0, paint);
canvas.DrawLine(0 + 1, 0, 0 + 1, canvas.ClipDeviceBounds.Height, paint);
canvas.DrawLine(0, surface.Canvas.ClipDeviceBounds.Height / 2, canvas.ClipDeviceBounds.Width, canvas.ClipDeviceBounds.Height / 2, paint);
canvas.DrawLine(canvas.ClipDeviceBounds.Width - 1, 0 + 1, canvas.ClipDeviceBounds.Width - 1, canvas.ClipDeviceBounds.Height, paint);
} // End Using paint
// Your drawing code goes here.
// surface.Snapshot().Encode(SKImageEncodeFormat.Webp, 80);
// SKData p = surface.Snapshot().Encode();
SKData p = surface.Snapshot().Encode(SKImageEncodeFormat.Png, 80);
// p.SaveTo()
using (System.IO.MemoryStream ms = new System.IO.MemoryStream(p.ToArray()))
{
this.pictureBox1.Image = System.Drawing.Image.FromStream(ms);
} // End Using ms
System.IO.File.WriteAllBytes(MapProjectPath("~testme.png"), p.ToArray());
} // End Using surface
// this.Close();
} // End Sub