protected override Bitmap Transform(IBitmapPool bitmapPool, Bitmap source, int outWidth, int outHeight)
{
int size = Math.Min(source.Width, source.Height);
int width = (source.Width - size) / 2;
int height = (source.Height - size) / 2;
Bitmap squaredBitmap = Bitmap.CreateBitmap(source, width, height, size, size);
if (squaredBitmap != source)
{
source.Recycle();
}
Bitmap bitmap = Bitmap.CreateBitmap(size, size, Bitmap.Config.Argb8888);
Canvas canvas = new Canvas(bitmap);
Paint paint = new Paint();
BitmapShader shader = new BitmapShader(squaredBitmap, BitmapShader.TileMode.Clamp,
BitmapShader.TileMode.Clamp);
paint.SetShader(shader);
paint.AntiAlias = true;
float r = size / 2f;
canvas.DrawCircle(r, r, r, paint);
squaredBitmap.Recycle();
return(BitmapResource.Obtain(bitmap, bitmapPool).Get());
}
protected override Bitmap Transform(IBitmapPool bitmapPool, Bitmap source, int p2, int p3)
{
int size = Math.Min(source.Width, source.Height);
int width = (source.Width - size) / 2;
int height = (source.Height - size) / 2;
Bitmap bitmap = bitmapPool.Get(size, size, Bitmap.Config.Argb8888)
?? Bitmap.CreateBitmap(size, size, Bitmap.Config.Argb8888);
Canvas canvas = new Canvas(bitmap);
Paint paint = new Paint();
BitmapShader shader =
new BitmapShader(source, Shader.TileMode.Clamp, Shader.TileMode.Clamp);
if (width != 0 || height != 0)
{
// source isn't square, move viewport to center
Matrix matrix = new Matrix();
matrix.SetTranslate(-width, -height);
shader.SetLocalMatrix(matrix);
}
paint.SetShader(shader);
paint.AntiAlias = true;
float r = size / 2f;
canvas.DrawCircle(r, r, r, paint);
return(BitmapResource.Obtain(bitmap, bitmapPool).Get());
}
public override Bitmap Operations(IBitmapPool bitmapPool, Bitmap source, Bitmap result)
{
Canvas canvas = new Canvas(result);
Drawable mask = mContext.Resources.GetDrawable(Resource.Drawable.White_Cricle);
mask.SetBounds(0, 0, source.Width, source.Height);
mask.Draw(canvas);
canvas.DrawBitmap(source, 0, 0, mMaskingPaint);
source.Recycle();
return(BitmapResource.Obtain(result, bitmapPool).Get());
}
