protected override void OnDraw(Canvas canvas)
{
base.OnDraw(canvas);
var paint = new Paint();
paint.SetColor(Color);
canvas.DrawCircle(Width / 2, Height / 2, Width / 2, paint);
}
public static void Draw(Canvas canvas, IViewport viewport, IStyle style, IFeature feature)
{
try
{
if (!feature.RenderedGeometry.ContainsKey(style)) feature.RenderedGeometry[style] = ToAndroidBitmap(feature.Geometry);
var bitmap = (AndroidGraphics.Bitmap)feature.RenderedGeometry[style];
var dest = WorldToScreen(viewport, feature.Geometry.GetBoundingBox());
dest = new BoundingBox(
dest.MinX,
dest.MinY,
dest.MaxX,
dest.MaxY);
var destination = RoundToPixel(dest);
using (var paint = new Paint())
{
canvas.DrawBitmap(bitmap, new Rect(0, 0, bitmap.Width, bitmap.Height), destination, paint);
}
DrawOutline(canvas, style, destination);
}
catch (Exception ex)
{
Trace.WriteLine(ex.Message);
}
}
public CirclePageIndicator(Context context, IAttributeSet attrs, int defStyle) : base(context, attrs, defStyle)
{
//Load defaults from resources
var res = Resources;
int defaultPageColor = res.GetColor(Resource.Color.default_circle_indicator_page_color);
int defaultFillColor = res.GetColor(Resource.Color.default_circle_indicator_fill_color);
int defaultOrientation = res.GetInteger(Resource.Integer.default_circle_indicator_orientation);
int defaultStrokeColor = res.GetColor(Resource.Color.default_circle_indicator_stroke_color);
float defaultStrokeWidth = res.GetDimension(Resource.Dimension.default_circle_indicator_stroke_width);
float defaultRadius = res.GetDimension(Resource.Dimension.default_circle_indicator_radius);
bool defaultCentered = res.GetBoolean(Resource.Boolean.default_circle_indicator_centered);
bool defaultSnap = res.GetBoolean(Resource.Boolean.default_circle_indicator_snap);
//Retrieve styles attributes
var a = context.ObtainStyledAttributes(attrs, Resource.Styleable.CirclePageIndicator, defStyle, Resource.Style.Widget_CirclePageIndicator);
mCentered = a.GetBoolean(Resource.Styleable.CirclePageIndicator_vpiCentered, defaultCentered);
mOrientation = a.GetInt(Resource.Styleable.CirclePageIndicator_vpiOrientation, defaultOrientation);
mPaintPageFill = new Paint(PaintFlags.AntiAlias);
mPaintPageFill.SetStyle(Paint.Style.Fill);
mPaintPageFill.Color = a.GetColor(Resource.Styleable.CirclePageIndicator_vpiPageColor, defaultPageColor);
mPaintStroke = new Paint(PaintFlags.AntiAlias);
mPaintStroke.SetStyle(Paint.Style.Stroke);
mPaintFill = new Paint(PaintFlags.AntiAlias);
mPaintFill.SetStyle(Paint.Style.Fill);
mSnap = a.GetBoolean(Resource.Styleable.CirclePageIndicator_vpiSnap, defaultSnap);
mRadius = a.GetDimension(Resource.Styleable.CirclePageIndicator_vpiRadius, defaultRadius);
mPaintFill.Color = a.GetColor(Resource.Styleable.CirclePageIndicator_vpiFillColor, defaultFillColor);
mPaintStroke.Color = a.GetColor(Resource.Styleable.CirclePageIndicator_vpiStrokeColor, defaultStrokeColor);
mPaintStroke.StrokeWidth = a.GetDimension(Resource.Styleable.CirclePageIndicator_vpiStrokeWidth, defaultStrokeWidth);
a.Recycle();
}
public static Bitmap getRoundedCroppedBitmap(Bitmap bitmap, int radius) {
Bitmap finalBitmap;
if (bitmap.Width != radius || bitmap.Height!= radius)
finalBitmap = Bitmap.CreateScaledBitmap(bitmap, radius, radius,
false);
else
finalBitmap = bitmap;
Bitmap output = Bitmap.CreateBitmap(finalBitmap.Width,
finalBitmap.Height, Bitmap.Config.Argb8888);
Canvas canvas = new Canvas(output);
Paint paint = new Paint();
Rect rect = new Rect(0, 0, finalBitmap.Width,
finalBitmap.Height);
paint.AntiAlias=true;
paint.FilterBitmap=true;
paint.Dither=true;
canvas.DrawARGB(0, 0, 0, 0);
paint.Color=Color.ParseColor("#BAB399");
canvas.DrawCircle(finalBitmap.Width / 2 + 0.7f,
finalBitmap.Height / 2 + 0.7f,
finalBitmap.Width / 2 + 0.1f, paint);
paint.SetXfermode(new PorterDuffXfermode(PorterDuff.Mode.SrcIn));
canvas.DrawBitmap(finalBitmap, rect, rect, paint);
return output;
}
public static Bitmap ToCropped(Bitmap source, double zoomFactor, double xOffset, double yOffset, double cropWidthRatio, double cropHeightRatio)
{
double sourceWidth = source.Width;
double sourceHeight = source.Height;
double desiredWidth = sourceWidth;
double desiredHeight = sourceHeight;
double desiredRatio = cropWidthRatio / cropHeightRatio;
double currentRatio = sourceWidth / sourceHeight;
if (currentRatio > desiredRatio)
desiredWidth = (cropWidthRatio * sourceHeight / cropHeightRatio);
else if (currentRatio < desiredRatio)
desiredHeight = (cropHeightRatio * sourceWidth / cropWidthRatio);
xOffset = xOffset * desiredWidth;
yOffset = yOffset * desiredHeight;
desiredWidth = desiredWidth / zoomFactor;
desiredHeight = desiredHeight / zoomFactor;
float cropX = (float)(((sourceWidth - desiredWidth) / 2) + xOffset);
float cropY = (float)(((sourceHeight - desiredHeight) / 2) + yOffset);
if (cropX < 0)
cropX = 0;
if (cropY < 0)
cropY = 0;
if (cropX + desiredWidth > sourceWidth)
cropX = (float)(sourceWidth - desiredWidth);
if (cropY + desiredHeight > sourceHeight)
cropY = (float)(sourceHeight - desiredHeight);
Bitmap bitmap = Bitmap.CreateBitmap((int)desiredWidth, (int)desiredHeight, source.GetConfig());
using (Canvas canvas = new Canvas(bitmap))
using (Paint paint = new Paint())
using (BitmapShader shader = new BitmapShader(source, Shader.TileMode.Clamp, Shader.TileMode.Clamp))
using (Matrix matrix = new Matrix())
{
if (cropX != 0 || cropY != 0)
{
matrix.SetTranslate(-cropX, -cropY);
shader.SetLocalMatrix(matrix);
}
paint.SetShader(shader);
paint.AntiAlias = false;
RectF rectF = new RectF(0, 0, (int)desiredWidth, (int)desiredHeight);
canvas.DrawRect(rectF, paint);
return bitmap;
}
}
public CircleDrawable(Bitmap bmp)
{
this.bmp = bmp;
this.bmpShader = new BitmapShader(bmp, Shader.TileMode.Clamp, Shader.TileMode.Clamp);
this.paint = new Paint() { AntiAlias = true };
this.paint.SetShader(bmpShader);
this.oval = new RectF();
}
private static void DrawRectangle(Canvas canvas, RectF destination, Styles.Color outlineColor)
{
var paint = new Paint();
paint.SetStyle(Paint.Style.Stroke);
paint.Color = new AndroidColor(outlineColor.R, outlineColor.G, outlineColor.B, outlineColor.A);
paint.StrokeWidth = 4;
canvas.DrawRect(destination, paint);
}
/// <summary>
/// Initializes a new instance of the <see cref="CanvasRenderContext" /> class.
/// </summary>
/// <param name="scale">The scale.</param>
public CanvasRenderContext(double scale)
{
this.paint = new Paint();
this.path = new Path();
this.bounds = new Rect();
this.pts = new List<float>();
this.Scale = scale;
}
public object Create(Color color)
{
var result = new ag.Paint
{
Color = color.ToAndroid(),
};
result.SetStyle(ag.Paint.Style.Fill);
return result;
}
public object Create(Color startColor, Color endColor, PointF startPoint, PointF endPoint)
{
var shader = new ag.LinearGradient(startPoint.X, startPoint.Y, endPoint.X, endPoint.Y, startColor.ToAndroid(), endColor.ToAndroid(),
// is this correct?
ag.Shader.TileMode.Clamp);
var paint = new ag.Paint();
paint.SetShader(shader);
return new BrushObject { Paint = paint }; // TODO: initial matrix
}
void InitStepCountPaint()
{
stepcountPaint = new Paint();
//stepcountPaint.Color = Color.White;
stepcountPaint.SetARGB(255, 50, 151, 218);
stepcountPaint.SetTypeface(Typeface.Create(Typeface.SansSerif, TypefaceStyle.Normal));
stepcountPaint.AntiAlias = true;
stepcountPaint.TextSize = owner.Resources.GetDimension(Resource.Dimension.StepCountTextSize);
}
/// <summary>
/// Initializes a new instance of the <see cref="ChartSurface"/> class.
/// </summary>
/// <param name="context">The context.</param>
/// <param name="chart">The chart.</param>
/// <param name="color">The color.</param>
/// <param name="colors">The colors.</param>
public ChartSurface(Context context, Chart chart, AndroidColor color, AndroidColor[] colors)
: base(context)
{
SetWillNotDraw(false);
Chart = chart;
Paint = new Paint() { Color = color, StrokeWidth = 2 };
Colors = colors;
}
public KenBurnsDrawable(Color defaultColor)
{
this.defaultColor = defaultColor;
this.paint = new Paint
{
AntiAlias = false,
FilterBitmap = false
};
}
private void ShowPath(Canvas canvas, int x, int y, Path.FillType ft, Paint paint)
{
canvas.Save();
canvas.Translate(x, y);
canvas.ClipRect(0, 0, 120, 120);
canvas.DrawColor(Color.White);
mPath.SetFillType(ft);
canvas.DrawPath(mPath, paint);
canvas.Restore();
}
private static void ApplyCustomTypeface(Paint paint, Typeface tf, TypefaceStyle style, int size)
{
if (style == TypefaceStyle.Italic)
paint.TextSkewX = -0.25f;
if(size > 0)
paint.TextSize = size;
paint.SetTypeface (tf);
}
public object Create(Color color, float thickness)
{
var paint = new ag.Paint
{
Color = color.ToAndroid(),
StrokeWidth = thickness,
StrokeCap = ag.Paint.Cap.Square,
StrokeMiter = 10f
};
return paint;
}
public static Bitmap ConvertConfig(Bitmap bitmap, Bitmap.Config config)
{
if (bitmap.GetConfig().Equals(config))
return Bitmap.CreateBitmap(bitmap);
Bitmap convertedBitmap = Bitmap.CreateBitmap(bitmap.Width, bitmap.Height, config);
Canvas canvas = new Canvas(convertedBitmap);
Android.Graphics.Paint paint = new Android.Graphics.Paint();
paint.Color = Android.Graphics.Color.Black;
canvas.DrawBitmap(bitmap, 0, 0, paint);
return convertedBitmap;
}
private void Init()
{
IsRunning = false;
OutlineAlpha = 1.0f;
outlinePaint = new Paint();
outlinePaint.AntiAlias = true;
outlinePaint.StrokeWidth = Utils.Dp2Px(2);
outlinePaint.Color = Resources.GetColor(Resource.Color.holo_blue);
outlinePaint.SetStyle(Paint.Style.Stroke);
var padding = Utils.Dp2Px(10);
SetPadding(padding, padding, padding, padding);
}
private static Paint ToAndroid(this Pen pen)
{
var paint = new Paint
{
AntiAlias = true,
Color = pen.Color.ToAndroid(),
StrokeWidth = (float)pen.Width,
StrokeJoin = Paint.Join.Round
};
paint.SetStyle(Paint.Style.Stroke);
return paint;
}
public override void Draw(Canvas canvas, ICharSequence text, int start, int end, float x, int top, int y, int bottom, Paint paint)
{
PrepView();
canvas.Save();
//Centering the token looks like a better strategy that aligning the bottom
int padding = (bottom - top - View.Bottom) / 2;
canvas.Translate(x, bottom - View.Bottom - padding);
View.Draw(canvas);
canvas.Restore();
}
public CircleView(Context context, int width, int height, int offset): base(context)
{
var paint = new Paint();
paint.Color = Color.Red;
paint.SetStyle(Paint.Style.Stroke);
paint.StrokeWidth = 3;
_shape = new ShapeDrawable(new OvalShape());
_shape.Paint.Set(paint);
_shape.SetBounds(offset, offset, width-offset, height-offset);
}
public MyOvalShape(Context context)
: base(context)
{
var paint = new Paint();
paint.SetARGB(255, 200, 255, 0);
paint.SetStyle(Paint.Style.Stroke);
paint.StrokeWidth = 4;
_shape = new ShapeDrawable(new OvalShape());
_shape.Paint.Set(paint);
_shape.SetBounds(20, 20, 300, 200);
}
public ClingDrawer(Resources resources, Color showcaseColor)
{
this.showcaseColor = showcaseColor;
PorterDuffXfermode mBlender = new PorterDuffXfermode(PorterDuff.Mode.Clear);
mEraser = new Paint();
mEraser.Color = Color.White;
mEraser.Alpha = 0;
mEraser.SetXfermode(mBlender);
mEraser.AntiAlias = true;
mShowcaseDrawable = resources.GetDrawable(Resource.Drawable.cling_bleached);
mShowcaseDrawable.SetColorFilter(showcaseColor, PorterDuff.Mode.Multiply);
}
public override int GetSize(Paint paint, ICharSequence text, int start, int end, Paint.FontMetricsInt fm)
{
LocalPaint.Set(paint);
ApplyCustomTypeFace(LocalPaint, _typeface);
LocalPaint.GetTextBounds(_icon, 0, 1, TextBounds);
if (fm != null)
{
fm.Descent = (int) (TextBounds.Height()*BaselineRatio);
fm.Ascent = -(TextBounds.Height() - fm.Descent);
fm.Top = fm.Ascent;
fm.Bottom = fm.Descent;
}
return TextBounds.Width();
}
protected override void DispatchDraw(
global::Android.Graphics.Canvas canvas)
{
// var gradient = new Android.Graphics.LinearGradient(0, 0, Width, 0,
// this.StartColor.ToAndroid(),
// this.EndColor.ToAndroid(),
// Android.Graphics.Shader.TileMode.Mirror);
var gradient = new RadialGradient(-100, 1200, 3000, this.StartColor.ToAndroid(), this.EndColor.ToAndroid(), Android.Graphics.Shader.TileMode.Clamp);//(-50, -50, this.StartColor.ToAndroid(), this.EndColor.ToAndroid());
var paint = new Android.Graphics.Paint() {
Dither = true,
};
paint.SetShader(gradient);
canvas.DrawPaint(paint);
base.DispatchDraw(canvas);
}
public override void Draw(Canvas canvas)
{
var box = Element as RoundedBox;
var rect = new Rect();
var paint = new Paint() {
Color = box.BackgroundColor.ToAndroid(),
AntiAlias = true,
};
GetDrawingRect(rect);
var radius = (float)(rect.Width() / box.Width * box.CornerRadius);
canvas.DrawRoundRect(new RectF(rect), radius, radius, paint);
}
public BadgeDrawable(Drawable child)
{
this.child = child;
badgePaint = new Paint
{
AntiAlias = true,
Color = Color.Blue,
};
textPaint = new Paint
{
AntiAlias = true,
Color = Android.Graphics.Color.White,
TextSize = 16,
TextAlign = Paint.Align.Center
};
}
public static Bitmap GetRoundedCornerBitmap(this Bitmap bitmap, int? roundPixelSize = null)
{
var chooseSize = bitmap.Width > bitmap.Height ? bitmap.Height : bitmap.Width;
roundPixelSize = roundPixelSize ?? (int)Application.Context.Resources.GetDimension(Resource.Dimension.RoundedCorners);
var output = Bitmap.CreateBitmap(chooseSize, chooseSize, Bitmap.Config.Argb8888);
var canvas = new Canvas(output);
var paint = new Paint();
var rect = new Rect(0, 0, chooseSize, chooseSize);
var rectF = new RectF(rect);
var roundPx = roundPixelSize.Value;
paint.AntiAlias = true;
canvas.DrawRoundRect(rectF, roundPx, roundPx, paint);
paint.SetXfermode(new PorterDuffXfermode(PorterDuff.Mode.SrcIn));
canvas.DrawBitmap(bitmap, rect, rect, paint);
return output;
}
// ---------------------------------------------------------
#region Overrides
protected override void OnElementChanged(ElementChangedEventArgs<Image> e)
{
base.OnElementChanged(e);
if (e.NewElement != null)
{
_formsView = (Paint.Views.PaintView.PaintView)e.NewElement;
_currentPaint = new Android.Graphics.Paint();
_currentPaint.Dither = true;
_currentPaint.SetStyle(Android.Graphics.Paint.Style.Stroke);
_currentPaint.StrokeJoin = Android.Graphics.Paint.Join.Round;
_currentPaint.StrokeCap = Android.Graphics.Paint.Cap.Round;
_deviceDensity = AndroidDevice.DisplayMetrics.Density > 1 ? AndroidDevice.DisplayMetrics.Density : 1;
}
}
public override void Draw(Android.Graphics.Canvas canvas,
MapView mapView, bool shadow)
{
base.Draw(canvas, mapView, shadow);
var paint = new Paint();
paint.AntiAlias = true;
paint.Color = Color.Purple;
paint.Alpha = 127;
var gp = new GeoPoint((int)(29.97611 * 1e6), (int)(31.132778 * 1e6));
var pt = mapView.Projection.ToPixels(gp, null);
float distance = mapView.Projection.MetersToEquatorPixels(200);
canvas.DrawCircle(pt.X, pt.Y, distance/2, paint);
}
void SetBackground(APaint platformPaint)
{
if (platformPaint != null)
{
if (_backgroundColor != null)
#pragma warning disable CA1416 // https://github.com/xamarin/xamarin-android/issues/6962
{
platformPaint.Color = _backgroundColor.Value;
}
#pragma warning restore CA1416
else
{
if (_background != null)
{
SetPaint(platformPaint, _background);
}
}
}
}
/// <summary>
/// Read the file and draw rectangles on it.
/// </summary>
/// <param name="fileName">The name of the file.</param>
/// <param name="annotations">Annotations to be add to the image. Can consist of rectangles and labels</param>
/// <returns>The image in Jpeg stream format</returns>
public static Emgu.Models.JpegData ImageFileToJpeg(String fileName, Annotation[] annotations = null)
{
using (BitmapFactory.Options options = new BitmapFactory.Options())
{
options.InMutable = true;
using (Android.Graphics.Bitmap bmp = BitmapFactory.DecodeFile(fileName, options))
{
if (annotations != null)
{
using (Android.Graphics.Paint p = new Android.Graphics.Paint())
using (Canvas c = new Canvas(bmp))
{
p.AntiAlias = true;
p.Color = Android.Graphics.Color.Red;
p.TextSize = 20;
for (int i = 0; i < annotations.Length; i++)
{
p.SetStyle(Paint.Style.Stroke);
float[] rects = ScaleLocation(annotations[i].Rectangle, bmp.Width, bmp.Height);
Android.Graphics.Rect r = new Rect((int)rects[0], (int)rects[1], (int)rects[2],
(int)rects[3]);
c.DrawRect(r, p);
p.SetStyle(Paint.Style.Fill);
c.DrawText(annotations[i].Label, (int)rects[0], (int)rects[1], p);
}
}
}
using (MemoryStream ms = new MemoryStream())
{
bmp.Compress(Bitmap.CompressFormat.Jpeg, 90, ms);
JpegData result = new JpegData();
result.Raw = ms.ToArray();
result.Width = bmp.Width;
result.Height = bmp.Height;
return(result);
}
}
}
}
public static void DrawResults(Android.Graphics.Bitmap bmp, MultiboxGraph.Result result, float scoreThreshold)
{
Rectangle[] locations = ScaleLocation(result.DecodedLocations, bmp.Width, bmp.Height);
Android.Graphics.Paint p = new Android.Graphics.Paint();
p.SetStyle(Paint.Style.Stroke);
p.AntiAlias = true;
p.Color = Android.Graphics.Color.Red;
Canvas c = new Canvas(bmp);
for (int i = 0; i < result.Scores.Length; i++)
{
if (result.Scores[i] > scoreThreshold)
{
Rectangle rect = locations[result.Indices[i]];
Android.Graphics.Rect r = new Rect(rect.Left, rect.Top, rect.Right, rect.Bottom);
c.DrawRect(r, p);
}
}
}
public override void Draw(Canvas canvas)
{
base.Draw(canvas);
var gradient = new Android.Graphics.LinearGradient(0, 0, Width, 0, this.StartColor.ToAndroid(), this.EndColor.ToAndroid(), Android.Graphics.Shader.TileMode.Mirror);
var paint = new Android.Graphics.Paint()
{
Dither = true,
AntiAlias = true
};
paint.SetShader(gradient);
var rect = new RectF(0, 0, canvas.Width, canvas.Height);
canvas.DrawRoundRect(rect, 00f, 00f, paint); // set CornerRadius here
}
protected override void DispatchDraw(Canvas canvas)
{
base.DispatchDraw(canvas);
LinearGradient gradient = null;
//for horizontal gradient
if (((GradientFrame)Element).GradientColorOrientation == GradientFrame.GradientOrientation.Horizontal)
{
gradient = new Android.Graphics.LinearGradient(0, 0, Width, 0,
((GradientFrame)Element).StartColor.ToAndroid(),
((GradientFrame)Element).EndColor.ToAndroid(),
Android.Graphics.Shader.TileMode.Mirror);
}
//for vertical gradient
if (((GradientFrame)Element).GradientColorOrientation == GradientFrame.GradientOrientation.Vertical)
{
gradient = new Android.Graphics.LinearGradient(0, 0, 0, Height,
((GradientFrame)Element).StartColor.ToAndroid(),
((GradientFrame)Element).EndColor.ToAndroid(),
Android.Graphics.Shader.TileMode.Mirror);
}
var paint = new Android.Graphics.Paint()
{
Dither = true,
};
paint.SetShader(gradient);
canvas.DrawPaint(paint);
base.DispatchDraw(canvas);
}
private void Start()
{
CurrentLineColor = Color.Black;
PenWidth = 5.0f;
DrawPath = new Android.Graphics.Path();
DrawPaint = new Android.Graphics.Paint
{
Color = CurrentLineColor,
AntiAlias = true,
StrokeWidth = PenWidth
};
DrawPaint.SetStyle(Android.Graphics.Paint.Style.Stroke);
DrawPaint.StrokeJoin = Android.Graphics.Paint.Join.Round;
DrawPaint.StrokeCap = Android.Graphics.Paint.Cap.Round;
CanvasPaint = new Android.Graphics.Paint
{
Dither = true
};
}
protected override void DispatchDraw(Canvas canvas)
{
LinearGradient gradient = null;
gradient = new Android.Graphics.LinearGradient(
0,
0,
Width,
0,
((GradientButton)Element).StartColor.ToAndroid(),
((GradientButton)Element).EndColor.ToAndroid(),
Android.Graphics.Shader.TileMode.Mirror);
var paint = new Android.Graphics.Paint()
{
Dither = true,
};
paint.SetShader(gradient);
canvas.DrawPaint(paint);
base.DispatchDraw(canvas);
}
public Android.Graphics.Bitmap ToGrayscale(Android.Graphics.Bitmap bmpOriginal)
{
int width, height;
height = bmpOriginal.Height;
width = bmpOriginal.Width;
float[] mat = new float[] {
0.3f, 0.59f, 0.11f, 0, 0,
0.3f, 0.59f, 0.11f, 0, 0,
0.3f, 0.59f, 0.11f, 0, 0,
0, 0, 0, 1, 0,
};
Android.Graphics.Bitmap bmpGrayscale = Android.Graphics.Bitmap.CreateBitmap(width, height, Android.Graphics.Bitmap.Config.Argb8888);
GC.Collect();
Android.Graphics.Canvas c = new Android.Graphics.Canvas(bmpGrayscale);
Android.Graphics.ColorMatrixColorFilter filter = new Android.Graphics.ColorMatrixColorFilter(mat);
Android.Graphics.Paint paint = new Android.Graphics.Paint();
paint.SetColorFilter(filter);
c.DrawBitmap(bmpOriginal, 0, 0, paint);
return(bmpGrayscale);
}
private void DrawFocusRect(ISurfaceHolder holder, float RectLeft, float RectTop, float RectRight, float RectBottom, Android.Graphics.Color color)
{
//lock
var canvas = holder.LockCanvas();
//no pointer to canvas?
if (canvas == null)
{
return;
}
//detect face
FaceEyes FE = Detect();
//clear out
canvas.DrawColor(Android.Graphics.Color.Transparent, Android.Graphics.PorterDuff.Mode.Clear);
//border's properties
var paint = new Android.Graphics.Paint();
paint.SetStyle(Android.Graphics.Paint.Style.Stroke);
paint.Color = color;
paint.StrokeWidth = 3;
Rectangle e0 = FE.Eyes[0];
Rectangle e1 = FE.Eyes[1];
Rectangle f0 = FE.Faces[0];
canvas.DrawRect(new Rect(e0.Left, e0.Top, e0.Right, e0.Bottom), paint);
canvas.DrawRect(new Rect(e1.Left, e1.Top, e1.Right, e1.Bottom), paint);
paint.Color = Android.Graphics.Color.White;
canvas.DrawRect(new Rect(f0.Left, f0.Top, f0.Right, f0.Bottom), paint);
//unlock
holder.UnlockCanvasAndPost(canvas);
}
public void FillEllipse(Paint b, Rectangle rectangle)
{
// TODO
}
public void FillEllipse(Paint b, float x, float y, float widht, float height)
{
// TODO
}
public void DrawRectangle(Paint p, Rectangle rect)
{
this.DrawRectangle(p, rect.X, rect.Y, rect.Width, rect.Height);
}
public void FillRectangle(Paint p, float x, float y, float width, float height)
{
p.SetStyle(Paint.Style.Fill);
this.canvas.DrawRect(x, y, x + width, y + height, p);
}
public void DrawEllipse(Paint pen, Rectangle rectangle)
{
// TODO
}
protected override void OnDraw(Canvas canvas)
{
coreX = Width / 2;
coreY = Height / 2;
roundRadius = (int)(Width / 2 * radiusDistance); //计算中心圆圈半径
RectF rect = new RectF(0, 0, Width, Height);
if (roundMenus != null && roundMenus.Count > 0)
{
float sweepAngle = 360 / roundMenus.Count; //每个弧形的角度
deviationDegree = sweepAngle / 2; //其实的偏移角度，如果4个扇形的时候是X形状，而非+,设为0试试就知道什么意思了
for (int i = 0; i < roundMenus.Count; i++)
{
RoundMenu roundMenu = roundMenus[i];
//填充
Paint paint = new Paint();
paint.AntiAlias = true;
if (onClickState == i)
{
//选中
paint.Color = new Color(roundMenu.selectSolidColor);
}
else
{
//未选中
paint.Color = new Color(roundMenu.solidColor);
}
canvas.DrawArc(rect, deviationDegree + (i * sweepAngle), sweepAngle, true, paint);
//画描边
paint = new Paint();
paint.AntiAlias = true;
paint.StrokeWidth = roundMenu.strokeSize;
paint.SetStyle(Paint.Style.Stroke);
paint.Color = new Color(roundMenu.strokeColor);
canvas.DrawArc(rect, deviationDegree + (i * sweepAngle), sweepAngle, roundMenu.useCenter, paint);
//画图案
Matrix matrix = new Matrix();
matrix.PostTranslate((float)((coreX + Width / 2 * roundMenu.iconDistance) - (roundMenu.icon.Width / 2)), coreY - (roundMenu.icon.Height / 2));
matrix.PostRotate(((i + 1) * sweepAngle), coreX, coreY);
canvas.DrawBitmap(roundMenu.icon, matrix, null);
}
}
//画中心圆圈
if (isCoreMenu)
{
//填充
RectF rect1 = new RectF(coreX - roundRadius, coreY - roundRadius, coreX + roundRadius, coreY + roundRadius);
Paint paint = new Paint();
paint.AntiAlias = true;
paint.StrokeWidth = coreMenuStrokeSize;
if (onClickState == -1)
{
paint.Color = new Color(coreMenuSelectColor);
}
else
{
paint.Color = new Color(coreMenuColor);
}
canvas.DrawArc(rect1, 0, 360, true, paint);
//画描边
paint = new Paint();
paint.AntiAlias = true;
paint.StrokeWidth = coreMenuStrokeSize;
paint.SetStyle(Paint.Style.Stroke);
paint.Color = new Color(coreMenuStrokeColor);
canvas.DrawArc(rect1, 0, 360, true, paint);
if (coreBitmap != null)
{
//画中心圆圈的"OK"图标
canvas.DrawBitmap(coreBitmap, coreX - coreBitmap.Width / 2, coreY - coreBitmap.Height / 2, null); //在 0，0坐标开始画入src
}
}
}
private Graphics()
{
this.paint = new droid.Paint();
this.Flags = droid.PaintFlags.AntiAlias;
this.ownCanvas = false;
}
public void Wrap(DroidTextLayoutBackend layout, AG.Paint paint)
{
var text = layout.Text;
var metrics = paint.GetFontMetrics();
Baseline = -metrics.Top;
LineHeight = -metrics.Ascent + metrics.Descent;
LineY = -metrics.Ascent; //- (metrics.Ascent + metrics.Descent);
var charWidths = new float[text.Length];
paint.GetTextWidths(text, charWidths);
var iLf = text.IndexOfAny(new char[] { '\n', '\r' });
HasLineFeed = iLf >= 0;
var textWidth = charWidths.Sum();
if (!HasLineFeed && (layout.Height <= 0 || layout.Height <= LineHeight) && (layout.Width <= 0 || textWidth <= layout.Width))
{
LineWidth = textWidth;
SingleLine(this);
}
else
{
MaxHeight = PreferedSize.Height > 0 ? PreferedSize.Height : (layout.Height <= 0 ? float.MaxValue : layout.Height);
MaxWidth = PreferedSize.Width > 0 ? PreferedSize.Width : (layout.Width <= 0 ? textWidth : layout.Width);
CursorPos = 0;
LineStart = 0;
while (LineY <= MaxHeight && CursorPos < text.Length)
{
LineWidth = 0f;
var whitePosY = -1f;
var whitepos = -1;
var newLine = false;
while (CursorPos < text.Length)
{
newLine = text [CursorPos] == '\n';
if (text [CursorPos] == '\r')
{
CursorPos++;
continue;
}
if (newLine)
{
break;
}
if (char.IsWhiteSpace(text [CursorPos]))
{
whitepos = CursorPos;
whitePosY = LineWidth;
}
LineWidth += charWidths [CursorPos];
if (LineWidth > MaxWidth)
{
if (whitepos > 0)
{
CursorPos = whitepos;
LineWidth = whitePosY;
}
break;
}
CursorPos++;
}
Action line = () => {
MultiLine(this);
LineY += LineHeight;
};
line();
CursorPos++;
LineStart = CursorPos;
if (newLine && CursorPos == text.Length)
{
line();
}
}
}
}
protected override bool DrawChild(Canvas canvas, global::Android.Views.View child, long drawingTime)
{
var box = (GradientContentView)Element;
//var radius = Math.Min(box.Width, Height) / 2;
//var strokeWidth = 10;
//radius -= strokeWidth / 2;
////Create path to clip
//var path = new Path();
//path.AddRoundRect(0,0,0,0, (float)box.Width, (float)box.Height, Path.Direction.Ccw);
//canvas.Save();
//canvas.ClipPath(path);
//var result = base.DrawChild(canvas, child, drawingTime);
//canvas.Restore();
//canvas.S
//// Create path for circle border
//path = new Path();
//path.AddCircle(Width / 2, Height / 2, radius, Path.Direction.Ccw);
////var paint = new Paint();
////paint.AntiAlias = true;
////paint.StrokeWidth = 5;
////paint.SetStyle(Paint.Style.Stroke);
////paint.Color = Android.Graphics.Color.ParseColor(((ImageCircle)Element).BorderColor);
//canvas.DrawPath(path, paint);
////Properly dispose
//paint.Dispose();
//path.Dispose();
//return result;
//var path = new RoundRectShape(new float[] { 8, 8, 8, 8, 8, 8, 8, 8 }, null, null);
var path = new Path();
path.AddRoundRect(new RectF(0, 0, Width, Height), box.CornerRadius, box.CornerRadius, Path.Direction.Ccw);
double width = 0;
double height = 0;
if (box.Orientation == GradientOrientation.Horizontal)
{
width = Width;
}
else
{
height = Height;
}
// var gradientDrawable = new GradientDrawable(GradientDrawable.Orientation.BlTr, );
//var gradient = new Android.Graphics.LinearGradient((float)box.StartPointX, (float)box.StartPointY, (float)box.EndPointX, (float)box.EndPointY,
float StartPointX, StartPointY, EndPointX, EndPointY = 0;
StartPointX = ((float)Width * (float)box.StartPointX);
StartPointY = ((float)Height * (float)box.StartPointY);
EndPointX = ((float)Width * (float)box.EndPointX);
EndPointY = ((float)Height * (float)box.EndPointY);
//var gradient = new Android.Graphics.LinearGradient((float)box.StartPointX, (float)box.StartPointY, (float)width, (float)height,
var gradient = new Android.Graphics.LinearGradient(StartPointX, StartPointY, EndPointX, EndPointY,
box.StartColor.ToAndroid(),
box.EndColor.ToAndroid(),
Android.Graphics.Shader.TileMode.Clamp);
var paint = new Android.Graphics.Paint()
{
Dither = true,
};
paint.SetShader(gradient);
canvas.DrawPath(path, paint);
// canvas.DrawPath();
//GradientDrawable.Bounds = canvas.ClipBounds;
//GradientDrawable.SetOrientation(GradientContentView.Orientation == GradientOrientation.Vertical
// ? GradientDrawable.Orientation.TopBottom
// : GradientDrawable.Orientation.LeftRight);
//GradientDrawable.Draw(canvas);
return(base.DrawChild(canvas, child, drawingTime));
}
private void CustomDispatchDraw(Canvas canvas)
{
try
{
this.StartColor = stack.StartColor;
this.EndColor = stack.EndColor;
this.gradientStyle = stack.GradientDirection;
if (_path != null)
{
int height = Height;
int width = Width;
if (gradientStyle == GradientStyle.Vertical)
{
width = 0;
}
else if (gradientStyle == GradientStyle.Horizontal)
{
height = 0;
}
else
{
height = 0;
}
var gradient = new Android.Graphics.LinearGradient(0, 0, width, height, this.StartColor.ToAndroid(), this.EndColor.ToAndroid(), Android.Graphics.Shader.TileMode.Mirror);
var paint = new Android.Graphics.Paint()
{
Dither = true,
};
paint.SetShader(gradient);
canvas.Save();
canvas.ClipPath(_path);
canvas.DrawPaint(paint);
try
{
if (stack.HasBorderColor == true)
{
var borderPaint = new Paint();
borderPaint.AntiAlias = true;
borderPaint.StrokeWidth = 2;
borderPaint.SetStyle(Paint.Style.Stroke);
borderPaint.Color = stack.BorderColor.ToAndroid();//global::Android.Graphics.Color.White;
canvas.DrawPath(_path, borderPaint);
}
}
catch (Exception ex)
{
var msg = ex.Message + "\n" + ex.StackTrace;
System.Diagnostics.Debug.WriteLine(msg);
}
canvas.Restore();
}
}
catch (Exception ex)
{
var msg = ex.Message + "\n" + ex.StackTrace;
System.Diagnostics.Debug.WriteLine(msg);
}
}
/// <summary>
/// Read the file and draw rectangles on it.
/// </summary>
/// <param name="fileName">The name of the file.</param>
/// <param name="annotations">Annotations to be add to the image. Can consist of rectangles and lables</param>
/// <returns>The image in Jpeg stream format</returns>
public static JpegData ImageFileToJpeg(String fileName, Annotation[] annotations = null)
{
#if __ANDROID__
BitmapFactory.Options options = new BitmapFactory.Options();
options.InMutable = true;
Android.Graphics.Bitmap bmp = BitmapFactory.DecodeFile(fileName, options);
Android.Graphics.Paint p = new Android.Graphics.Paint();
p.SetStyle(Paint.Style.Stroke);
p.AntiAlias = true;
p.Color = Android.Graphics.Color.Red;
Canvas c = new Canvas(bmp);
for (int i = 0; i < annotations.Length; i++)
{
float[] rects = ScaleLocation(annotations[i].Rectangle, bmp.Width, bmp.Height);
Android.Graphics.Rect r = new Rect((int)rects[0], (int)rects[1], (int)rects[2], (int)rects[3]);
c.DrawRect(r, p);
}
using (MemoryStream ms = new MemoryStream())
{
bmp.Compress(Bitmap.CompressFormat.Jpeg, 90, ms);
JpegData result = new JpegData();
result.Raw = ms.ToArray();
result.Width = bmp.Width;
result.Height = bmp.Height;
return(result);
}
#elif __MACOS__
NSImage img = NSImage.ImageNamed(fileName);
if (annotations != null && annotations.Length > 0)
{
DrawAnnotations(img, annotations);
}
var imageData = img.AsTiff();
var imageRep = NSBitmapImageRep.ImageRepsWithData(imageData)[0] as NSBitmapImageRep;
var jpegData = imageRep.RepresentationUsingTypeProperties(NSBitmapImageFileType.Jpeg, null);
byte[] jpeg = new byte[jpegData.Length];
System.Runtime.InteropServices.Marshal.Copy(jpegData.Bytes, jpeg, 0, (int)jpegData.Length);
JpegData result = new JpegData();
result.Raw = jpeg;
result.Width = (int)img.Size.Width;
result.Height = (int)img.Size.Height;
return(result);
#elif __IOS__
UIImage uiimage = new UIImage(fileName);
UIGraphics.BeginImageContextWithOptions(uiimage.Size, false, 0);
var context = UIGraphics.GetCurrentContext();
uiimage.Draw(new CGPoint());
context.SetStrokeColor(UIColor.Red.CGColor);
context.SetLineWidth(2);
for (int i = 0; i < annotations.Length; i++)
{
float[] rects = ScaleLocation(
annotations[i].Rectangle,
(int)uiimage.Size.Width,
(int)uiimage.Size.Height);
CGRect cgRect = new CGRect(
(nfloat)rects[0],
(nfloat)rects[1],
(nfloat)(rects[2] - rects[0]),
(nfloat)(rects[3] - rects[1]));
context.AddRect(cgRect);
context.DrawPath(CGPathDrawingMode.Stroke);
}
context.ScaleCTM(1, -1);
context.TranslateCTM(0, -uiimage.Size.Height);
for (int i = 0; i < annotations.Length; i++)
{
float[] rects = ScaleLocation(
annotations[i].Rectangle,
(int)uiimage.Size.Width,
(int)uiimage.Size.Height);
context.SelectFont("Helvetica", 18, CGTextEncoding.MacRoman);
context.SetFillColor((nfloat)1.0, (nfloat)0.0, (nfloat)0.0, (nfloat)1.0);
context.SetTextDrawingMode(CGTextDrawingMode.Fill);
context.ShowTextAtPoint(rects[0], uiimage.Size.Height - rects[1], annotations[i].Label);
}
UIImage imgWithRect = UIGraphics.GetImageFromCurrentImageContext();
UIGraphics.EndImageContext();
var jpegData = imgWithRect.AsJPEG();
byte[] jpeg = new byte[jpegData.Length];
System.Runtime.InteropServices.Marshal.Copy(jpegData.Bytes, jpeg, 0, (int)jpegData.Length);
JpegData result = new JpegData();
result.Raw = jpeg;
result.Width = (int)uiimage.Size.Width;
result.Height = (int)uiimage.Size.Height;
return(result);
#else
Bitmap img = new Bitmap(fileName);
if (annotations != null)
{
using (Graphics g = Graphics.FromImage(img))
{
for (int i = 0; i < annotations.Length; i++)
{
if (annotations[i].Rectangle != null)
{
float[] rects = ScaleLocation(annotations[i].Rectangle, img.Width, img.Height);
PointF origin = new PointF(rects[0], rects[1]);
RectangleF rect = new RectangleF(origin, new SizeF(rects[2] - rects[0], rects[3] - rects[1]));
Pen redPen = new Pen(Color.Red, 3);
g.DrawRectangle(redPen, Rectangle.Round(rect));
String label = annotations[i].Label;
if (label != null)
{
g.DrawString(label, new Font(FontFamily.GenericSansSerif, 20f), Brushes.Red, origin);
}
}
}
g.Save();
}
}
using (MemoryStream ms = new MemoryStream())
{
img.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg);
JpegData result = new JpegData();
result.Raw = ms.ToArray();
result.Width = img.Size.Width;
result.Height = img.Size.Height;
return(result);
}
#endif
}
public static void UpdateBackground(this Paint paint, Brush brush, int height, int width)
{
if (paint == null || brush == null || brush.IsEmpty)
{
return;
}
if (brush is SolidColorBrush solidColorBrush)
{
var backgroundColor = solidColorBrush.Color;
paint.Color = backgroundColor.ToAndroid();
}
if (brush is LinearGradientBrush linearGradientBrush)
{
var p1 = linearGradientBrush.StartPoint;
var x1 = (float)p1.X;
var y1 = (float)p1.Y;
var p2 = linearGradientBrush.EndPoint;
var x2 = (float)p2.X;
var y2 = (float)p2.Y;
var gradientBrushData = linearGradientBrush.GetGradientBrushData();
var colors = gradientBrushData.Item1;
var offsets = gradientBrushData.Item2;
if (colors.Length < 2)
{
return;
}
var linearGradientShader = new LinearGradient(
width * x1,
height * y1,
width * x2,
height * y2,
colors,
offsets,
Shader.TileMode.Clamp);
paint.SetShader(linearGradientShader);
}
if (brush is RadialGradientBrush radialGradientBrush)
{
var center = radialGradientBrush.Center;
float centerX = (float)center.X;
float centerY = (float)center.Y;
float radius = (float)radialGradientBrush.Radius;
var gradientBrushData = radialGradientBrush.GetGradientBrushData();
var colors = gradientBrushData.Item1;
var offsets = gradientBrushData.Item2;
if (colors.Length < 2)
{
return;
}
var radialGradientShader = new RadialGradient(
width * centerX,
height * centerY,
Math.Max(height, width) * radius,
colors,
offsets,
Shader.TileMode.Clamp);
paint.SetShader(radialGradientShader);
}
}
public void DrawLine(Paint p, float x1, float y1, float x2, float y2)
{
this.canvas.DrawLine(x1, y1, x2, y2, p);
}
public void DrawLine(Paint p, Point startPoint, Point endPoint)
{
this.canvas.DrawLine(startPoint.X, startPoint.Y, endPoint.X, endPoint.Y, p);
}
/// <summary>
/// Read the file and draw rectangles on it.
/// </summary>
/// <param name="fileName">The name of the file.</param>
/// <param name="annotations">Annotations to be add to the image. Can consist of rectangles and lables</param>
/// <returns>The image in Jpeg stream format</returns>
public static byte[] ImageFileToJpeg(String fileName, Annotation[] annotations = null)
{
#if __ANDROID__
BitmapFactory.Options options = new BitmapFactory.Options();
options.InMutable = true;
Android.Graphics.Bitmap bmp = BitmapFactory.DecodeFile(fileName, options);
Android.Graphics.Paint p = new Android.Graphics.Paint();
p.SetStyle(Paint.Style.Stroke);
p.AntiAlias = true;
p.Color = Android.Graphics.Color.Red;
Canvas c = new Canvas(bmp);
for (int i = 0; i < annotations.Length; i++)
{
float[] rects = ScaleLocation(annotations[i].Rectangle, bmp.Width, bmp.Height);
Android.Graphics.Rect r = new Rect((int)rects[0], (int)rects[1], (int)rects[2], (int)rects[3]);
c.DrawRect(r, p);
}
using (MemoryStream ms = new MemoryStream())
{
bmp.Compress(Bitmap.CompressFormat.Jpeg, 90, ms);
return(ms.ToArray());
}
#elif __MACOS__
NSImage img = NSImage.ImageNamed(fileName);
DrawAnnotations(img, annotations);
/*
* img.LockFocus();
*
* NSColor redColor = NSColor.Red;
* redColor.Set();
* var context = NSGraphicsContext.CurrentContext;
* var cgcontext = context.CGContext;
* cgcontext.ScaleCTM(1, -1);
* cgcontext.TranslateCTM(0, -img.Size.Height);
* //context.IsFlipped = !context.IsFlipped;
* for (int i = 0; i < annotations.Length; i++)
* {
* float[] rects = ScaleLocation(annotations[i].Rectangle, (int)img.Size.Width, (int) img.Size.Height);
* CGRect cgRect = new CGRect(
* rects[0],
* rects[1],
* rects[2] - rects[0],
* rects[3] - rects[1]);
* NSBezierPath.StrokeRect(cgRect);
* }
* img.UnlockFocus();
*/
var imageData = img.AsTiff();
var imageRep = NSBitmapImageRep.ImageRepsWithData(imageData)[0] as NSBitmapImageRep;
var jpegData = imageRep.RepresentationUsingTypeProperties(NSBitmapImageFileType.Jpeg, null);
byte[] jpeg = new byte[jpegData.Length];
System.Runtime.InteropServices.Marshal.Copy(jpegData.Bytes, jpeg, 0, (int)jpegData.Length);
return(jpeg);
#elif __IOS__
UIImage uiimage = new UIImage(fileName);
UIGraphics.BeginImageContextWithOptions(uiimage.Size, false, 0);
var context = UIGraphics.GetCurrentContext();
uiimage.Draw(new CGPoint());
context.SetStrokeColor(UIColor.Red.CGColor);
context.SetLineWidth(2);
for (int i = 0; i < annotations.Length; i++)
{
float[] rects = ScaleLocation(
annotations[i].Rectangle,
(int)uiimage.Size.Width,
(int)uiimage.Size.Height);
CGRect cgRect = new CGRect(
(nfloat)rects[0],
(nfloat)rects[1],
(nfloat)(rects[2] - rects[0]),
(nfloat)(rects[3] - rects[1]));
context.AddRect(cgRect);
context.DrawPath(CGPathDrawingMode.Stroke);
}
UIImage imgWithRect = UIGraphics.GetImageFromCurrentImageContext();
UIGraphics.EndImageContext();
var jpegData = imgWithRect.AsJPEG();
byte[] jpeg = new byte[jpegData.Length];
System.Runtime.InteropServices.Marshal.Copy(jpegData.Bytes, jpeg, 0, (int)jpegData.Length);
return(jpeg);
#else
if (Emgu.TF.Util.Platform.OperationSystem == OS.Windows)
{
Bitmap img = new Bitmap(fileName);
if (annotations != null)
{
using (Graphics g = Graphics.FromImage(img))
{
for (int i = 0; i < annotations.Length; i++)
{
if (annotations[i].Rectangle != null)
{
float[] rects = ScaleLocation(annotations[i].Rectangle, img.Width, img.Height);
PointF origin = new PointF(rects[0], rects[1]);
RectangleF rect = new RectangleF(rects[0], rects[1], rects[2] - rects[0], rects[3] - rects[1]);
Pen redPen = new Pen(Color.Red, 3);
g.DrawRectangle(redPen, Rectangle.Round(rect));
String label = annotations[i].Label;
if (label != null)
{
g.DrawString(label, new Font(FontFamily.GenericSansSerif, 20f), Brushes.Red, origin);
}
}
}
g.Save();
}
}
using (MemoryStream ms = new MemoryStream())
{
img.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg);
return(ms.ToArray());
}
}
else
{
throw new Exception("DrawResultsToJpeg Not implemented for this platform");
}
#endif
}
void Initialise()
{
mTestPaint = new Paint();
mTestPaint.Set(this.Paint);
//max size defaults to the initially specified text size unless it is too small
}
void DrawShadow(Canvas canvas)
{
if (_shadowCanvas == null)
{
_shadowCanvas = new Canvas();
}
if (_shadowPaint == null)
{
_shadowPaint = new Android.Graphics.Paint
{
AntiAlias = true,
Dither = true,
FilterBitmap = true
}
}
;
Graphics.Color solidColor = null;
// If need to redraw shadow
if (_invalidateShadow)
{
var viewHeight = _viewBounds.Height();
var viewWidth = _viewBounds.Width();
if (GetChildAt(0) is AView child)
{
if (viewHeight == 0)
{
viewHeight = child.MeasuredHeight;
}
if (viewWidth == 0)
{
viewWidth = child.MeasuredWidth;
}
}
// If bounds is zero
if (viewHeight != 0 && viewWidth != 0)
{
var bitmapHeight = viewHeight + MaximumRadius;
var bitmapWidth = viewWidth + MaximumRadius;
// Reset bitmap to bounds
_shadowBitmap = Bitmap.CreateBitmap(
bitmapWidth, bitmapHeight, Bitmap.Config.Argb8888
);
// Reset Canvas
_shadowCanvas.SetBitmap(_shadowBitmap);
_invalidateShadow = false;
// Create the local copy of all content to draw bitmap as a
// bottom layer of natural canvas.
base.DispatchDraw(_shadowCanvas);
// Get the alpha bounds of bitmap
Bitmap extractAlpha = _shadowBitmap.ExtractAlpha();
// Clear past content content to draw shadow
_shadowCanvas.DrawColor(Android.Graphics.Color.Black, PorterDuff.Mode.Clear);
var shadowOpacity = (float)Shadow.Opacity;
if (Shadow.Paint is LinearGradientPaint linearGradientPaint)
{
var linearGradientShaderFactory = PaintExtensions.GetLinearGradientShaderFactory(linearGradientPaint, shadowOpacity);
_shadowPaint.SetShader(linearGradientShaderFactory.Resize(bitmapWidth, bitmapHeight));
}
if (Shadow.Paint is RadialGradientPaint radialGradientPaint)
{
var radialGradientShaderFactory = PaintExtensions.GetRadialGradientShaderFactory(radialGradientPaint, shadowOpacity);
_shadowPaint.SetShader(radialGradientShaderFactory.Resize(bitmapWidth, bitmapHeight));
}
if (Shadow.Paint is SolidPaint solidPaint)
{
solidColor = solidPaint.ToColor();
#pragma warning disable CA1416 // https://github.com/xamarin/xamarin-android/issues/6962
_shadowPaint.Color = solidColor.WithAlpha(shadowOpacity).ToPlatform();
#pragma warning restore CA1416
}
// Apply the shadow radius
var radius = Shadow.Radius;
if (radius <= 0)
{
radius = 0.01f;
}
if (radius > 100)
{
radius = MaximumRadius;
}
_shadowPaint.SetMaskFilter(new BlurMaskFilter(radius, BlurMaskFilter.Blur.Normal));
float shadowOffsetX = (float)Shadow.Offset.X;
float shadowOffsetY = (float)Shadow.Offset.Y;
if (Clip == null)
{
_shadowCanvas.DrawBitmap(extractAlpha, shadowOffsetX, shadowOffsetY, _shadowPaint);
}
else
{
var bounds = new Graphics.RectF(0, 0, canvas.Width, canvas.Height);
var path = Clip.PathForBounds(bounds)?.AsAndroidPath();
path.Offset(shadowOffsetX, shadowOffsetY);
_shadowCanvas.DrawPath(path, _shadowPaint);
}
// Recycle and clear extracted alpha
extractAlpha.Recycle();
}
else
{
// Create placeholder bitmap when size is zero and wait until new size coming up
_shadowBitmap = Bitmap.CreateBitmap(1, 1, Bitmap.Config.Rgb565 !);
}
}
// Reset alpha to draw child with full alpha
if (solidColor != null)
#pragma warning disable CA1416 // https://github.com/xamarin/xamarin-android/issues/6962
{
_shadowPaint.Color = solidColor.ToPlatform();
}
#pragma warning restore CA1416
// Draw shadow bitmap
if (_shadowCanvas != null && _shadowBitmap != null && !_shadowBitmap.IsRecycled)
{
canvas.DrawBitmap(_shadowBitmap, 0.0F, 0.0F, _shadowPaint);
}
}
void ClearShadowResources()
{
_shadowCanvas?.Dispose();
_shadowPaint?.Dispose();
_shadowBitmap?.Dispose();
_shadowCanvas = null;
_shadowPaint = null;
_shadowBitmap = null;
}
}
public DrawLine(Context context) : base(context)
{
paint = new Android.Graphics.Paint();
}
/// <summary>
/// set default values of Paint
/// </summary>
/// <param name="value">Value.</param>
public static AG.Paint DefaultSettings(this AG.Paint value)
{
value.AntiAlias = true;
value.FilterBitmap = true;
return(value);
}
public void SetPaint(AG.Paint dest)
{
dest.SetFont(this.Font);
dest.TextAlign = AG.Paint.Align.Left;
}