public static SKImageInfo DecodeBounds(byte[] buffer, SKColorType pref = SKColorType.Unknown)
{
SKImageInfo info;
SKImageDecoder.DecodeMemoryBounds(buffer, out info, pref);
return(info);
}
public static SKImageInfo DecodeBounds(string filename, SKColorType pref = SKColorType.Unknown)
{
SKImageInfo info;
SKImageDecoder.DecodeFileBounds(filename, out info, pref);
return(info);
}
public static SKImageInfo DecodeBounds(SKStreamRewindable stream, SKColorType pref = SKColorType.Unknown)
{
SKImageInfo info;
SKImageDecoder.DecodeStreamBounds(stream, out info, pref);
return(info);
}
public static SKBitmap Decode(byte[] buffer, SKColorType pref = SKColorType.Unknown)
{
var bitmap = new SKBitmap();
if (!SKImageDecoder.DecodeMemory(buffer, bitmap, pref))
{
bitmap.Dispose();
bitmap = null;
}
return(bitmap);
}
public static SKBitmap Decode(string filename, SKColorType pref = SKColorType.Unknown)
{
var bitmap = new SKBitmap();
if (!SKImageDecoder.DecodeFile(filename, bitmap, pref))
{
bitmap.Dispose();
bitmap = null;
}
return(bitmap);
}
public static SKBitmap Decode(SKStreamRewindable stream, SKColorType pref = SKColorType.Unknown)
{
var bitmap = new SKBitmap();
if (!SKImageDecoder.DecodeStream(stream, bitmap, pref))
{
bitmap.Dispose();
bitmap = null;
}
return(bitmap);
}
public static void BitmapDecoder(SKCanvas canvas, int width, int height)
{
var assembly = typeof(Demos).GetTypeInfo().Assembly;
var imageName = assembly.GetName().Name + ".color-wheel.png";
canvas.Clear(SKColors.White);
// load the embedded resource stream
using (var resource = assembly.GetManifestResourceStream(imageName))
using (var stream = new SKManagedStream(resource))
using (var decoder = new SKImageDecoder(stream))
using (var paint = new SKPaint())
using (var tf = SKTypeface.FromFamilyName("Arial"))
{
paint.IsAntialias = true;
paint.TextSize = 14;
paint.Typeface = tf;
paint.Color = SKColors.Black;
// read / set decoder settings
decoder.DitherImage = true;
decoder.PreferQualityOverSpeed = true;
decoder.SampleSize = 2;
// decode the image
using (var bitmap = new SKBitmap())
{
var result = decoder.Decode(stream, bitmap);
if (result != SKImageDecoderResult.Failure)
{
var info = bitmap.Info;
var x = 25;
var y = 25;
canvas.DrawBitmap(bitmap, x, y);
x += info.Width + 25;
y += 14;
canvas.DrawText(string.Format("Result: {0}", result), x, y, paint);
y += 20;
canvas.DrawText(string.Format("Size: {0}px x {1}px", bitmap.Width, bitmap.Height), x, y, paint);
y += 20;
canvas.DrawText(string.Format("Pixels: {0} @ {1}b/px", bitmap.Pixels.Length, bitmap.BytesPerPixel), x, y, paint);
}
}
}
}
