private void OnCanvasViewPaintSurface(object sender, SKPaintSurfaceEventArgs args)
{
SKImageInfo info = args.Info;
SKSurface surface = args.Surface;
SKCanvas canvas = surface.Canvas;
canvas.Clear();
float size = 600;
float posX = (info.Width - size) / 2;
float posY = (info.Height - size) / 2;
using (SKPath path = new SKPath())
{
var fillRect = SKRect.Create(info.Width, info.Height);
var codeRect = SKRect.Create(posX, posY, size, size);
var roundRect = new SKRoundRect(codeRect, 20);
canvas.ClipRoundRect(roundRect, SKClipOperation.Difference, true);
SKColor maskColor;
SKColor.TryParse("003AB6", out maskColor);
using (SKPaint paint = new SKPaint())
{
paint.Style = SKPaintStyle.Fill;
paint.Color = maskColor;
canvas.DrawRect(fillRect, paint);
}
}
}
void OnColorSourceTapped(object sender, EventArgs e)
{
if (!(sender is BindableObject bindable) || !(bindable.BindingContext is ColorSource selectedColorSource))
{
return;
}
if (SelectedColorSource == selectedColorSource)
{
return;
}
selectedColorSource.IsSelected = true;
if (SelectedColorSource != null)
{
SelectedColorSource.IsSelected = false;
}
SelectedColorSource = selectedColorSource;
SKColor.TryParse(SelectedColorSource.Color.ToHex(), out SKColor sKColor);
_color = sKColor;
_paint.Color = _color;
}
void OnCanvasViewPaintSurface(object sender, SKPaintSurfaceEventArgs args)
{
SKImageInfo info = args.Info;
SKSurface surface = args.Surface;
SKCanvas canvas = surface.Canvas;
canvas.Clear();
SKColor.TryParse(StartColor, out var stColor);
SKColor.TryParse(EndColor, out var edColor);
var colors = new SKColor[] { stColor, edColor };
SKPoint startPoint = new SKPoint(0, 0);
SKPoint endPoint = Horizontal ? new SKPoint(info.Width, 0) : new SKPoint(0, info.Height);
var shader = SKShader.CreateLinearGradient(startPoint, endPoint, colors, null, SKShaderTileMode.Clamp);
SKPaint paint = new SKPaint
{
Style = SKPaintStyle.Fill,
Shader = shader
};
canvas.DrawRect(new SKRect(0, 0, info.Width, info.Height), paint);
}
public static bool TryParse(string str, out SKColor color)
{
if (str.StartsWith("rgb(", StringComparison.Ordinal))
{
str = str.Substring(4, str.Length - 4).TrimEnd(')');
var values = str.Split(',');
var r = Convert.ToInt32(values[0]);
var g = Convert.ToInt32(values[1]);
var b = Convert.ToInt32(values[2]);
str = $"#{r:X2}{g:X2}{b:X2}";
}
if (!SKColor.TryParse(str, out color))
{
string hexString = null;
if (HexValues.TryGetValue(str, out hexString))
{
return(SKColor.TryParse(hexString, out color));
}
return(false);
}
return(true);
}
private void BackgroundGradient_PaintSurface(object sender, SkiaSharp.Views.Forms.SKPaintSurfaceEventArgs e)
{
SKImageInfo info = e.Info;
SKSurface surface = e.Surface;
SKCanvas canvas = surface.Canvas;
canvas.Clear();
// get the brush based on the theme
SKColor gradientStart;
SKColor.TryParse("#373B44", out gradientStart);
SKColor gradientMid;
SKColor.TryParse("#355C7D", out gradientMid);
SKColor gradientEnd;
SKColor.TryParse("#4286f4", out gradientEnd);
// gradient background with 3 colors
SKPaint backgroundBrush = new SKPaint();
backgroundBrush.Shader = SKShader.CreateRadialGradient(
new SKPoint(0, info.Height * .8f),
info.Height * .8f,
new SKColor[] { gradientStart, gradientMid, gradientEnd },
new float[] { 0, .5f, 1 },
SKShaderTileMode.Clamp);
SKRect backgroundBounds = new SKRect(0, 0, info.Width, info.Height);
canvas.DrawRect(backgroundBounds, backgroundBrush);
}
private void drawRectangle(SSShape rectangle, SKCanvas canvas)
{
using (var paint = new SKPaint()) {
paint.IsAntialias = true;
SKRect rect = new SKRect();
rect.Size = new SKSize(rectangle.size.width, rectangle.size.height);
var position = PositionHelper.getPosition(rectangle.alignX, rectangle.alignY, rect.Width, rect.Height, canvasSize);
rect.Location = new SKPoint(position.x, position.y);
if (rectangle.fillStyle == FillStyle.Solid)
{
SKColor.TryParse(rectangle.fillColor, out SKColor color);
color = color.WithAlpha(rectangle.alpha);
paint.Color = color;
}
else if (rectangle.fillStyle == FillStyle.Gradient)
{
var startPoint = GradientHelper.getRectPoint(rect, (SSGradientDirection)rectangle.gradient?.startPoint);
var endPoint = GradientHelper.getRectPoint(rect, (SSGradientDirection)rectangle.gradient?.endPoint);
paint.Shader = GradientHelper.createGradient((SSGradient)rectangle.gradient, startPoint, endPoint);
}
canvas.DrawRect(rect, paint);
}
}
async Task InitChart()
{
Acr.UserDialogs.UserDialogs.Instance.ShowLoading();
await Task.Delay(700);
List <Microcharts.Entry> entries = new List <Microcharts.Entry>();
Color color = (Color)Application.Current.Resources["brandBlue"];
//SKColor barColor = SKColor.FromHsl((float)color.Hue / 255, (float)color.Saturation / 255, (float)color.Luminosity / 255, (byte)color.A);
SKColor barColor;
SKColor.TryParse(color.GetHexString(), out barColor);
ViewModel = ViewModel ?? new UsageViewModel();
foreach (var usage in ViewModel.GasUsage)
{
entries.Add(new Microcharts.Entry(usage.Value)
{
Color = barColor, Label = usage.Date.ToString("MMMM").Substring(0, 1), ValueLabel = usage.Value.ToString()
});
}
var chart = new BarChart()
{
Entries = entries
};
this.usageChart.Chart = chart;
Acr.UserDialogs.UserDialogs.Instance.HideLoading();
}
public static bool TryParse(string str, out SKColor color)
{
if (str == "transparent")
{
color = SKColor.Empty;
return(true);
}
if (str.StartsWith("rgb(", StringComparison.Ordinal))
{
str = str.Substring(4, str.Length - 4).TrimEnd(')');
var values = str.Split(',');
var r = int.Parse(values[0]);
var g = int.Parse(values[1]);
var b = int.Parse(values[2]);
str = $"#{r:X2}{g:X2}{b:X2}";
}
if (!SKColor.TryParse(str, out color))
{
if (HexValues.TryGetValue(str, out var hexString))
{
return(SKColor.TryParse(hexString, out color));
}
return(false);
}
return(true);
}
public virtual Chart Build()
{
var labels = Labels;
var values = Values;
var colors = Colors;
if (Labels.Count != Values.Count)
{
throw new Exception($"{nameof(labels)} and {nameof(values)} have different length.");
}
var entries = Enumerable.Range(0, labels.Count).Select(i =>
{
var color = SKColor.Empty;
if (colors == null || colors.Count <= 0 || !SKColor.TryParse(colors[i], out color))
{
color = DefinedColors[i % DefinedColors.Length];
}
return(new Entry(values[i])
{
Label = labels[i],
Color = color,
ValueLabel = values[i].ToString()
});
});
var chart = new TChart();
chart.Entries = entries;
return(chart);
}
/// <summary>
/// Draws grid lines to match boundaries for 10 character PlusCodes.
/// </summary>
/// <param name="totalArea">the GeoArea to draw lines in</param>
/// <returns>the byte array for the maptile png file</returns>
public byte[] DrawCell10GridLines(GeoArea totalArea)
{
int imageSizeX = IMapTiles.SlippyTileSizeSquare;
int imageSizeY = IMapTiles.SlippyTileSizeSquare;
SKBitmap bitmap = new SKBitmap(imageSizeX, imageSizeY, SKColorType.Rgba8888, SKAlphaType.Premul);
SKCanvas canvas = new SKCanvas(bitmap);
var bgColor = new SKColor();
SKColor.TryParse("00000000", out bgColor);
canvas.Clear(bgColor);
canvas.Scale(1, -1, imageSizeX / 2, imageSizeY / 2);
SKPaint paint = new SKPaint();
SKColor color = new SKColor();
SKColor.TryParse("#00CCFF", out color);
paint.Color = color;
paint.Style = SKPaintStyle.Stroke;
paint.StrokeWidth = 1;
paint.IsAntialias = true;
double degreesPerPixelX = totalArea.LongitudeWidth / imageSizeX;
double degreesPerPixelY = totalArea.LatitudeHeight / imageSizeY;
//This is hardcoded to Cell 8 spaced gridlines.
var imageLeft = totalArea.WestLongitude;
var spaceToFirstLineLeft = (imageLeft % resolutionCell10);
var imageBottom = totalArea.SouthLatitude;
var spaceToFirstLineBottom = (imageBottom % resolutionCell10);
double lonLineTrackerDegrees = imageLeft - spaceToFirstLineLeft; //This is degree coords
while (lonLineTrackerDegrees <= totalArea.EastLongitude + resolutionCell10) //This means we should always draw at least 2 lines, even if they're off-canvas.
{
var geoLine = new LineString(new Coordinate[] { new Coordinate(lonLineTrackerDegrees, 90), new Coordinate(lonLineTrackerDegrees, -90) });
var points = PolygonToSKPoints(geoLine, totalArea, degreesPerPixelX, degreesPerPixelY);
canvas.DrawLine(points[0], points[1], paint);
lonLineTrackerDegrees += resolutionCell10;
}
double latLineTrackerDegrees = imageBottom - spaceToFirstLineBottom; //This is degree coords
while (latLineTrackerDegrees <= totalArea.NorthLatitude + resolutionCell10) //This means we should always draw at least 2 lines, even if they're off-canvas.
{
var geoLine = new LineString(new Coordinate[] { new Coordinate(180, latLineTrackerDegrees), new Coordinate(-180, latLineTrackerDegrees) });
var points = PolygonToSKPoints(geoLine, totalArea, degreesPerPixelX, degreesPerPixelY);
canvas.DrawLine(points[0], points[1], paint);
latLineTrackerDegrees += resolutionCell10;
}
var ms = new MemoryStream();
var skms = new SkiaSharp.SKManagedWStream(ms);
bitmap.Encode(skms, SkiaSharp.SKEncodedImageFormat.Png, 100);
var results = ms.ToArray();
skms.Dispose(); ms.Close(); ms.Dispose();
return(results);
}
public static SKColor GetSKColor(string hexCode)
{
SKColor _color = SKColors.Transparent;
SKColor.TryParse(hexCode, out _color);
return(_color);
}
private SKColor FromString(string color)
{
SKColor skcolor = SKColors.Empty;
SKColor.TryParse(color, out skcolor);
return(skcolor);
}
/// <summary>
/// Parses the provided colour name into an SKColor.
/// </summary>
/// <param name="colour">The string to parse.</param>
private SKColor GetColour(string hex)
{
if (!SKColor.TryParse(hex, out SKColor colour))
{
return(SKColors.Red);
}
return(colour);
}
/// <inheritdoc />
public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
{
if (string.IsNullOrWhiteSpace((string)value))
{
return(SKColor.Empty);
}
return(SKColor.TryParse((string)value, out SKColor color) ? color : SKColor.Empty);
}
internal static SKBitmap WatermarkText(SKBitmap original, ResizeParams resizeParams, WatermarkTextModel watermarkText)
{
var toBitmap = new SKBitmap(original.Width, original.Height);
var canvas = new SKCanvas(toBitmap);
// Draw a bitmap rescaled
var paint = new SKPaint();
//paint.Typeface = SKTypeface.FromFamilyName("Arial");
paint.TextSize = watermarkText.TextSize;
paint.TextAlign = watermarkText.TextAlign.GetSKTextAlign();
if (watermarkText.IsVerticalText)
{
paint.IsVerticalText = true;
}
else
{
paint.IsLinearText = true;
}
if (watermarkText.Type == 2)
{
paint.IsStroke = true;
paint.StrokeWidth = watermarkText.StrokeWidth;
paint.StrokeCap = SKStrokeCap.Round;
}
paint.Style = watermarkText.Type.GetSKPaintStyle();
paint.FilterQuality = watermarkText.Quality.GetSKFilterQuality();
paint.TextSkewX = watermarkText.TextSkewX;
paint.IsAntialias = true;
//https://www.color-hex.com/
if (SKColor.TryParse(watermarkText.Color, out SKColor color))
{
paint.Color = color;
}
else
{
paint.Color = SKColors.Black;
}
canvas.DrawBitmap(original, 0, 0);
var x = watermarkText.PositionMeasureType == 1 ? watermarkText.X : watermarkText.X.ToPixel(original.Width);
var y = watermarkText.PositionMeasureType == 1 ? watermarkText.Y : watermarkText.Y.ToPixel(original.Height);
canvas.DrawText(watermarkText.Value, x, y, paint);
canvas.Flush();
canvas.Dispose();
paint.Dispose();
original.Dispose();
return(toBitmap);
}
private static SKColor[] getColors(string[] colors)
{
SKColor[] skColors = new SKColor[colors.Length];
for (int i = 0; i < colors.Length; i++)
{
SKColor.TryParse(colors[i], out SKColor color);
skColors[i] = color;
}
return(skColors);
}
private void OnCanvasViewPaintSurface(object sender, SKPaintSurfaceEventArgs e)
{
if (!(BindingContext is ClockViewModel clockViewModel))
{
return;
}
if (SKColor.TryParse(ColorsAndHex[clockViewModel.CurrentProfile.HandsColor], out SKColor handsColor) &&
SKColor.TryParse(ColorsAndHex[clockViewModel.CurrentProfile.FaceColor], out SKColor faceColor))
{
SKCanvas canvas = e.Surface.Canvas;
clockViewModel.ClockDrawerService.DrawClock(canvas, handsColor,
faceColor, clockViewModel.GetTime(), e.Info.Height, e.Info.Width);
}
}
private SSPosition drawLabel(SSLabel label, SKCanvas canvas, SSPosition position)
{
using (SKPaint paint = new SKPaint()) {
paint.TextSize = label.fontSize;
paint.IsAntialias = true;
paint.Typeface = getFont(label);
SKColor.TryParse(label.color, out SKColor color);
color = color.WithAlpha(label.alpha);
paint.Color = color;
float height = label.fontSize;
canvas.DrawText(label.text, position.x, position.y, paint);
position.x += paint.MeasureText(label.text);
return(position);
}
}
private void OnDataReceived(object sender, DataReceivedEventArgs e)
{
var data = e.Get <RedrawData>();
currentText = data.Text;
if (SKColor.TryParse(data.Color, out var color))
{
currentColor = color;
}
currentSize = data.Size;
skiaView.Invalidate();
}
public static bool TryParse(string input, out SKColor result)
{
result = default;
if (string.IsNullOrWhiteSpace(input))
{
return(false);
}
else if (namedColors.ContainsKey(input))
{
result = namedColors[input];
return(true);
}
return(SKColor.TryParse(input, out result));
}
private IEnumerable <SKColor> MatchColor(string name)
{
if (WCUtils.ColorNames.Contains(name))
{
yield return(WCUtils.ColorLibrary[name]);
yield break;
}
if (string.Equals(name, "transparent", StringComparison.OrdinalIgnoreCase))
{
yield return(SKColor.Empty);
yield break;
}
if (WildcardPattern.ContainsWildcardCharacters(name))
{
bool foundMatch = false;
var pattern = new WildcardPattern(name, WildcardOptions.IgnoreCase);
foreach (var color in WCUtils.ColorLibrary)
{
if (pattern.IsMatch(color.Key))
{
yield return(color.Value);
foundMatch = true;
}
}
if (foundMatch)
{
yield break;
}
}
if (SKColor.TryParse(name, out SKColor c))
{
yield return(c);
yield break;
}
throw new ArgumentTransformationMetadataException();
}
private async Task <bool> PlaceMultipixelPacket(string instructions, short placeDiscordUserId)
{
PlaceDBManager placeDBManager = PlaceDBManager.Instance();
foreach (var instruction in instructions.Split(';'))
{
Stopwatch watch = new Stopwatch();
watch.Start();
var delay = Task.Delay(990); // wait for 990 ms instead of 1000ms so if the main method takes longer we dont loose too many
var args = instruction.Split('|');
short x = short.Parse(args[0]);
short y = short.Parse(args[1]);
//SKColor color = ColorTranslator.FromHtml(args[2]);
if (!SKColor.TryParse(args[2], out SKColor color))
{
continue;
}
var success = placeDBManager.PlacePixel(x, y, color, placeDiscordUserId);
watch.Stop();
// TODO ensure the perf info is updated if only multipixels are placed, for now this should be fine
if (success)
{
PlaceModule.PixelPlacementTimeLastMinute.Add(watch.ElapsedMilliseconds);
}
else
{
lock (PlaceModule.PlaceAggregateObj)
{
PlaceModule.FailedPixelPlacements++;
}
}
await delay;
}
return(true);
}
private void OnCanvasViewPaintSurface(object sender, SKPaintSurfaceEventArgs e)
{
if (BindingContext is ClockViewModel clockViewModel)
{
if (currentData.CurrentProfile == null)
{
return;
}
bool handsParsed = SKColor.TryParse(colorsRepository.ColorAndHex[currentData.CurrentProfile.HandsColor], out SKColor handsColor);
bool faceParsed = SKColor.TryParse(colorsRepository.ColorAndHex[currentData.CurrentProfile.FaceColor], out SKColor faceColor);
DateTime?time = clockViewModel.GetTimeByTimezone();
if (handsParsed && faceParsed && time != null)
{
SKCanvas canvas = e.Surface.Canvas;
clockViewModel.DrawClock(handsColor, faceColor, canvas, (DateTime)time, e.Info.Height, e.Info.Width);
}
}
}
private SKColor[] MatchColor(string name)
{
string errorMessage;
if (WCUtils.ColorNames.Contains(name))
{
return(new[] { WCUtils.ColorLibrary[name] });
}
if (string.Equals(name, "transparent", StringComparison.OrdinalIgnoreCase))
{
return(new[] { SKColor.Empty });
}
if (WildcardPattern.ContainsWildcardCharacters(name))
{
var pattern = new WildcardPattern(name, WildcardOptions.IgnoreCase);
var colorList = new List <SKColor>();
foreach (var color in WCUtils.ColorLibrary)
{
if (pattern.IsMatch(color.Key))
{
colorList.Add(color.Value);
}
}
if (colorList.Count > 0)
{
return(colorList.ToArray());
}
errorMessage = $"Wildcard pattern '{name}' did not match any known color names.";
throw new ArgumentTransformationMetadataException(errorMessage);
}
if (SKColor.TryParse(name, out SKColor c))
{
return(new[] { c });
}
errorMessage = $"Unrecognised color name: '{name}'.";
throw new ArgumentTransformationMetadataException(errorMessage);
}
public static SKColor?ParseColorString(string tint)
{
if (string.IsNullOrEmpty(tint))
{
return(null);
}
if (SKColor.TryParse(tint, out var color))
{
return(color);
}
if (ColorTable.TryGetNamedColor(tint, out color))
{
return(color);
}
return(null);
}
private void ItemExport_Click(object sender, RoutedEventArgs e)
{
if (items.SelectedIndex >= 0 && items.Items.GetItemAt(items.SelectedIndex) is Item item)
{
var dlg = new Microsoft.Win32.SaveFileDialog()
{
Filter = "Png Files (*.png)|*.png;" +
"|Jpg Files (*.jpg)|*.jpg;" +
"|Jpeg Files (*.jpeg)|*.jpeg;" +
"|Webp Files (*.webp)|*.webp;" +
"|Pdf Files (*.pdf)|*.pdf;" +
"|Xps Files (*.xps)|*.xps;" +
"|Svg Files (*.svg)|*.svg;" +
"|All Files (*.*)|*.*",
FileName = item.Name,
DefaultExt = "png",
FilterIndex = 0
};
if (dlg.ShowDialog() == true && dlg.FileName != null)
{
var textBackground = TextOutputBackground.Text;
var textScaleX = TextOutputScaleX.Text;
var textScaleY = TextOutputScaleY.Text;
if (SKColor.TryParse(textBackground, out var skBackgroundColor) == false)
{
return;
}
if (float.TryParse(textScaleX, out var scaleX) == false)
{
return;
}
if (float.TryParse(textScaleY, out var scaleY) == false)
{
return;
}
VM.ExportItem(item.SvgPath, dlg.FileName, skBackgroundColor, scaleX, scaleY);
}
}
}
public void InvalidHexToColor()
{
var tuples = new List <string> {
"#ABCDE",
"#123456ug",
"12sd",
"11111111111111",
};
foreach (var item in tuples)
{
// values
string hex = item;
SKColor color;
var result = SKColor.TryParse(hex, out color);
Assert.IsFalse(result, hex);
}
}
public IActionResult Rectangle(int width, int height, string bgColor, string fgColor, string text = null, int?textSize = null)
{
if (width * height > _options.MaxSize)
{
return(UnprocessableEntity());
}
if (width <= 0 || height <= 0 ||
!SKColor.TryParse(bgColor ?? _options.BackgroundColor, out var skBgColor) ||
!SKColor.TryParse(fgColor ?? _options.ForegroundColor, out var skFgColor))
{
return(BadRequest());
}
var image = Draw.Steps(
Draw.BackgroundColor(skBgColor),
Draw.CenteredText(text ?? $"{width}×{height}", textSize ?? _options.TextSize, skFgColor));
return(new ImageResult(width, height, image));
}
public void OnCanvasViewPaintSurface(object sender, SKPaintSurfaceEventArgs args)
{
SKImageInfo info = args.Info;
SKSurface surface = args.Surface;
SKCanvas canvas = surface.Canvas;
canvas.Clear();
using (SKPaint paint = new SKPaint())
{
SKColor SpideyBlueBckGrnd;
SKColor.TryParse("#020f1f", out SpideyBlueBckGrnd);
SKColor SpideyLightBlueBckGrnd;
SKColor.TryParse("#001c41", out SpideyLightBlueBckGrnd);
paint.Shader = SKShader.CreateLinearGradient(
new SKPoint(info.Rect.Top, info.Rect.Top),
new SKPoint(info.Rect.Bottom, info.Rect.Bottom),
new SKColor[] { SpideyBlueBckGrnd, SpideyLightBlueBckGrnd },
new float[] { 0, 0.60f },
SKShaderTileMode.Mirror);
canvas.DrawRect(info.Rect, paint);
}
}
private SortedDictionary <float, SKColor> ReadStops(XElement e)
{
var stops = new SortedDictionary <float, SKColor>();
var ns = e.Name.Namespace;
foreach (var se in e.Elements(ns + "stop"))
{
var style = ReadStyle(se);
var offset = ReadNumber(style["offset"]);
var color = SKColors.Black;
byte alpha = 255;
string stopColor;
if (style.TryGetValue("stop-color", out stopColor))
{
// preserve alpha
if (SKColor.TryParse(stopColor, out color) && color.Alpha == 255)
{
alpha = color.Alpha;
}
}
string stopOpacity;
if (style.TryGetValue("stop-opacity", out stopOpacity))
{
alpha = (byte)(ReadNumber(stopOpacity) * 255);
}
color = color.WithAlpha(alpha);
stops[offset] = color;
}
return(stops);
}
){kind=link}