public static void DrawBitmap(this SKCanvas canvas, SKBitmap bitmap, SKRect source, SKRect dest,
BitmapStretch stretch,
BitmapAlignment horizontal = BitmapAlignment.Center,
BitmapAlignment vertical = BitmapAlignment.Center,
SKPaint paint = null)
{
if (stretch == BitmapStretch.Fill)
{
canvas.DrawBitmap(bitmap, source, dest, paint);
}
else
{
float scale = 1;
switch (stretch)
{
case BitmapStretch.None:
break;
case BitmapStretch.Uniform:
scale = Math.Min(dest.Width / source.Width, dest.Height / source.Height);
break;
case BitmapStretch.UniformToFill:
scale = Math.Max(dest.Width / source.Width, dest.Height / source.Height);
break;
}
SKRect display = CalculateDisplayRect(dest, scale * source.Width, scale * source.Height,
horizontal, vertical);
canvas.DrawBitmap(bitmap, source, display, paint);
}
}
// SkiaSharp-os Canvas-re Kirajzol egy képet. "ApectFit"
public static void DrawBitmap(this SKCanvas canvas, SKBitmap bitmap, SKRect dest,
BitmapStretch stretch)
{
// Scaling beállítása Aspect fit-hez hasonlóra
float scale = Math.Min(dest.Width / bitmap.Width, dest.Height / bitmap.Height);
SKRect display = CalculateDisplayRect(dest, scale * bitmap.Width, scale * bitmap.Height);
canvas.DrawBitmap(bitmap, display);
}
void OnCanvasViewPaintSurface(object sender, SKPaintSurfaceEventArgs args)
{
SKImageInfo info = args.Info;
SKSurface surface = args.Surface;
SKCanvas canvas = surface.Canvas;
canvas.Clear();
SKRect dest = new SKRect(0, 0, info.Width, info.Height);
BitmapStretch stretch = (BitmapStretch)stretchPicker.SelectedItem;
BitmapAlignment horizontal = (BitmapAlignment)horizontalPicker.SelectedItem;
BitmapAlignment vertical = (BitmapAlignment)verticalPicker.SelectedItem;
canvas.DrawBitmap(bitmap, SOURCE, dest, stretch, horizontal, vertical);
}
