public static SKStreamAsset OpenStream(string path)
{
var stream = new SKFileStream(path);
if (!stream.IsValid)
{
stream.Dispose();
stream = null;
}
return(stream);
}
public static void CustomFonts(SKCanvas canvas, int width, int height)
{
string text = "\u03A3 and \u0750";
using (var paint = new SKPaint()) {
canvas.Clear(SKColors.White);
paint.IsAntialias = true;
using (var tf = SKTypeface.FromFile(CustomFontPath)) {
paint.Color = XamGreen;
paint.TextSize = 60;
paint.Typeface = tf;
canvas.DrawText(text, 50, 50, paint);
}
using (var stream = new SKFileStream(CustomFontPath))
using (var tf = SKTypeface.FromStream(stream)) {
paint.Color = XamDkBlue;
paint.TextSize = 60;
paint.Typeface = tf;
canvas.DrawText(text, 50, 100, paint);
}
var assembly = typeof(Demos).GetTypeInfo().Assembly;
var fontName = assembly.GetName().Name + ".embedded-font.ttf";
using (var resource = assembly.GetManifestResourceStream(fontName))
using (var memory = new MemoryStream()) {
resource.CopyTo(memory);
var bytes = memory.ToArray();
using (var stream = new SKMemoryStream(bytes))
using (var tf = SKTypeface.FromStream(stream)) {
paint.Color = XamLtBlue;
paint.TextSize = 60;
paint.Typeface = tf;
canvas.DrawText(text, 50, 150, paint);
}
}
using (var resource = assembly.GetManifestResourceStream(fontName))
using (var stream = new SKManagedStream(resource))
using (var tf = SKTypeface.FromStream(stream)) {
paint.Color = XamPurple;
paint.TextSize = 60;
paint.Typeface = tf;
canvas.DrawText(text, 50, 200, paint);
}
}
}
private static SKStream OpenStream(string path)
{
if (!SKFileStream.IsPathSupported(path))
{
// due to a bug (https://github.com/mono/SkiaSharp/issues/390)
return(WrapManagedStream(File.OpenRead(path)));
}
else
{
return(new SKFileStream(path));
}
}
public static SKCodec Create(string filename, out SKCodecResult result)
{
var stream = SKFileStream.OpenStream(filename);
if (stream == null)
{
result = SKCodecResult.InternalError;
return(null);
}
return(Create(stream, out result));
}
public static SKTypeface FromFile(string path, int index = 0)
{
if (path == null)
{
throw new ArgumentNullException(nameof(path));
}
using (var stream = SKFileStream.OpenStream(path)) {
if (stream == null)
{
return(null);
}
else
{
return(FromStream(stream, index));
}
}
}
public static SKData Create(string filename)
{
if (string.IsNullOrEmpty(filename))
{
throw new ArgumentException("The filename cannot be empty.", nameof(filename));
}
using (var stream = SKFileStream.OpenStream(filename)) {
if (stream == null)
{
return(null);
}
else
{
return(Create(stream));
}
}
}
public static bool IsPathSupported(string path) => SKFileStream.IsPathSupported(path);
public static void CustomFonts (SKCanvas canvas, int width, int height)
{
string text = "\u03A3 and \u0750";
using (var paint = new SKPaint ()) {
canvas.Clear (SKColors.White);
paint.IsAntialias = true;
using (var tf = SKTypeface.FromFile (CustomFontPath)) {
paint.Color = XamGreen;
paint.TextSize = 40;
paint.Typeface = tf;
canvas.DrawText (text, 50, 50, paint);
}
using (var stream = new SKFileStream (CustomFontPath))
using (var tf = SKTypeface.FromStream (stream)) {
paint.Color = XamDkBlue;
paint.TextSize = 40;
paint.Typeface = tf;
canvas.DrawText (text, 50, 100, paint);
}
var assembly = typeof(Demos).GetTypeInfo ().Assembly;
var fontName = assembly.GetName ().Name + ".embedded-font.ttf";
using (var resource = assembly.GetManifestResourceStream (fontName))
using (var memory = new MemoryStream ()) {
resource.CopyTo (memory);
var bytes = memory.ToArray ();
using (var stream = new SKMemoryStream (bytes))
using (var tf = SKTypeface.FromStream (stream)) {
paint.Color = XamLtBlue;
paint.TextSize = 40;
paint.Typeface = tf;
canvas.DrawText (text, 50, 150, paint);
}
}
using (var resource = assembly.GetManifestResourceStream (fontName))
using (var stream = new SKManagedStream (resource))
using (var tf = SKTypeface.FromStream (stream)) {
paint.Color = XamPurple;
paint.TextSize = 40;
paint.Typeface = tf;
canvas.DrawText (text, 50, 200, paint);
}
}
}