public async Task Icon ()
{
var size = new Size (64);
var canvas = Platforms.Current.CreateImageCanvas (size, scale: 2);
canvas.SaveState ();
canvas.Scale (size);
canvas.Translate (1 / 8.0, 0);
var p = new Path ();
p.MoveTo (0, 1,false);
p.LineTo (0, 0, false);
p.LineTo (0.5, 1, false);
p.LineTo (0.5, 0,false);
var colors = new [] {
"#DCDCDD",
"#C5C3C6",
"#46494C",
"#4C5C68",
"#68A5E2",
};
foreach (var c in colors) {
p.Pen = new Pen (c, 1 / 4.0);
p.Draw (canvas);
canvas.Translate (1 / 16.0, 0);
}
await SaveImage (canvas, "Icon.png");
}
public Drawing(Size size, DrawingFunc func)
{
if (func == null)
{
throw new ArgumentNullException("func");
}
this.size = size;
this.func = func;
}
public IImageCanvas CreateImageCanvas(Size size, double scale = 1.0, bool transparency = true)
{
var pixelWidth = (int)Math.Ceiling(size.Width * scale);
var pixelHeight = (int)Math.Ceiling(size.Height * scale);
var format = transparency ? PixelFormat.Format32bppPArgb : PixelFormat.Format24bppRgb;
var bitmap = new Bitmap(pixelWidth, pixelHeight, format);
return(new BitmapCanvas(bitmap, scale));
}
public IImageCanvas CreateImageCanvas(Size size, double scale = 1.0, bool transparency = true)
{
var pixelWidth = (int) Math.Ceiling(size.Width*scale);
var pixelHeight = (int) Math.Ceiling(size.Height*scale);
var bitmap = Bitmap.CreateBitmap(pixelWidth, pixelHeight, Bitmap.Config.Argb8888);
if (!transparency)
{
bitmap.EraseColor(Colors.Black.Argb);
}
return new BitmapCanvas(bitmap, scale);
}
public IImageCanvas CreateImageCanvas(Size size, double scale = 1.0, bool transparency = true)
{
var pixelWidth = (int)Math.Ceiling (size.Width * scale);
var pixelHeight = (int)Math.Ceiling (size.Height * scale);
var bitmapInfo = transparency ? CGImageAlphaInfo.PremultipliedFirst : CGImageAlphaInfo.NoneSkipFirst;
var bitsPerComp = 8;
var bytesPerRow = transparency ? 4 * pixelWidth : 4 * pixelWidth;
var colorSpace = CGColorSpace.CreateDeviceRGB ();
var bitmap = new CGBitmapContext (IntPtr.Zero, pixelWidth, pixelHeight, bitsPerComp, bytesPerRow, colorSpace, bitmapInfo);
return new CGBitmapContextCanvas (bitmap, scale);
}
public static IImage CreateImage(this IPlatform platform, Func<int, int, Color> colorFunc, Size size,
double scale = 1.0)
{
var w = (int) Math.Ceiling(size.Width);
var h = (int) Math.Ceiling(size.Height);
var colors = new Color[w*h];
for (var y = 0; y < h; y++)
{
var o = y*w;
for (var x = 0; x < w; x++)
{
colors[o + x] = colorFunc(x, y);
}
}
return platform.CreateImage(colors, w, scale);
}
public CGImageImage(CGImage image, double scale)
{
if (image == null)
throw new ArgumentNullException ("image");
this.image = image;
this.scale = scale;
this.size = new Size (image.Width / scale, image.Height / scale);
}
public static void DrawRectangle(this ICanvas canvas, Point position, Size size, Pen pen = null, BaseBrush brush = null)
{
canvas.DrawRectangle(new Rect(position, size), pen, brush);
}
public static void Translate(this ICanvas canvas, Size translation)
{
canvas.Transform(Transform.Translate(translation));
}
public Rect(Point position, Size size)
: this(position.X, position.Y, size.Width, size.Height)
{
}
public void DrawImage(IImage image, Rect frame, double alpha = 1.0)
{
var ii = image as BitmapImage;
if (ii != null)
{
var paint = GetImagePaint(alpha);
var isize = new Size(ii.Bitmap.Width, ii.Bitmap.Height);
var scale = frame.Size/isize;
var m = new Matrix();
m.PreTranslate((float) frame.X, (float) frame.Y);
m.PreScale((float) scale.Width, (float) scale.Height);
graphics.DrawBitmap(ii.Bitmap, m, paint);
}
}
public IImageCanvas CreateImageCanvas(Size size, double scale = 1.0, bool transparency = true)
{
return new NullImageSurface();
}
public static void FillEllipse(this ICanvas canvas, Point position, Size size, Color color)
{
canvas.DrawEllipse(new Rect(position, size), null, new SolidBrush(color));
}
public static void FillEllipse(this ICanvas canvas, Point position, Size size, BaseBrush brush)
{
canvas.DrawEllipse(new Rect(position, size), null, brush);
}
private void Read(XDocument doc)
{
var svg = doc.Root;
var ns = svg.Name.Namespace;
//
// Find the defs (gradients)
//
foreach (var d in svg.Descendants())
{
var idA = d.Attribute("id");
if (idA != null)
{
defs[ReadString(idA).Trim()] = d;
}
}
//
// Get the dimensions
//
var widthA = svg.Attribute("width");
var heightA = svg.Attribute("height");
var width = _valuesParser.ReadNumber(widthA);
var height = _valuesParser.ReadNumber(heightA);
var size = new Size(width, height);
var viewBox = new Rect(size);
var viewBoxA = svg.Attribute("viewBox") ?? svg.Attribute("viewPort");
if (viewBoxA != null)
{
viewBox = ReadRectangle(viewBoxA.Value);
}
if (widthA != null && widthA.Value.Contains("%"))
{
size.Width *= viewBox.Width;
}
if (heightA != null && heightA.Value.Contains("%"))
{
size.Height *= viewBox.Height;
}
//
// Add the elements
//
Graphic = new Graphic(size, viewBox);
AddElements(Graphic.Children, svg.Elements(), null, null);
}
public WICBitmapCanvas(Size size, double scale = 1.0, bool transparency = true, Direct2DFactories factories = null)
: this(// DIPs = pixels / (DPI/96.0)
new WIC.Bitmap ((factories ?? Direct2DFactories.Shared).WICFactory, (int)(Math.Ceiling (size.Width * scale)), (int)(Math.Ceiling (size.Height * scale)), transparency ? WIC.PixelFormat.Format32bppPBGRA : WIC.PixelFormat.Format32bppBGR, WIC.BitmapCreateCacheOption.CacheOnLoad),
new D2D1.RenderTargetProperties (D2D1.RenderTargetType.Default, new D2D1.PixelFormat (DXGI.Format.Unknown, D2D1.AlphaMode.Unknown), (float)(96.0 * scale), (float)(96.0 * scale), D2D1.RenderTargetUsage.None, D2D1.FeatureLevel.Level_DEFAULT))
{
}
public void Inflate(Size padding)
{
Inflate(padding.Width, padding.Height);
}
public Rect(Size size)
: this(0, 0, size.Width, size.Height)
{
}
public static CGSize GetCGSize(Size size)
{
return new CGSize ((nfloat)size.Width, (nfloat)size.Height);
}
public GraphicCanvas(Size size)
{
Graphic = new Graphic(size);
}
public static void Scale(this ICanvas canvas, Size scale, Point point)
{
if (scale.Width != 1 || scale.Height != 1)
{
canvas.Translate(point);
canvas.Scale(scale);
canvas.Translate(-point);
}
}
public IImageCanvas CreateImageCanvas(Size size, double scale = 1.0, bool transparency = true)
{
return new WICBitmapCanvas (size, scale, transparency);
}
public static void StrokeEllipse(this ICanvas canvas, Point position, Size size, Color color, double width = 1.0)
{
canvas.DrawEllipse(new Rect(position, size), new Pen(color, width), null);
}
public static void Scale(this ICanvas canvas, Size scale)
{
if (scale.Width != 1 || scale.Height != 1)
{
canvas.Transform(Transform.Scale(scale));
}
}
public WICBitmapCanvas(WIC.Bitmap bmp, D2D1.RenderTargetProperties properties, Direct2DFactories factories = null)
: base(new D2D1.WicRenderTarget ((factories ?? Direct2DFactories.Shared).D2DFactory, bmp, properties), factories)
{
this.Bmp = bmp;
this.scale = properties.DpiX / 96.0;
var bmpSize = bmp.Size;
this.size = new Size (bmpSize.Width / scale, bmpSize.Height / scale);
}
