public static void DrawBitmap(this SKCanvas canvas, SKBitmap bitmap, SKRect dest,
SKStretch stretch,
SKAlignment horizontal = SKAlignment.Center,
SKAlignment vertical = SKAlignment.Center,
SKPaint paint = null)
{
if (stretch == SKStretch.Fill)
{
canvas.DrawBitmap(bitmap, dest, paint);
}
else
{
float scale = 1;
switch (stretch)
{
case SKStretch.None:
break;
case SKStretch.Uniform:
scale = Math.Min(dest.Width / bitmap.Width, dest.Height / bitmap.Height);
break;
case SKStretch.UniformToFill:
scale = Math.Max(dest.Width / bitmap.Width, dest.Height / bitmap.Height);
break;
}
SKRect display = CalculateDisplayRect(dest, scale * bitmap.Width, scale * bitmap.Height, horizontal, vertical);
canvas.DrawBitmap(bitmap, display, paint);
}
}
void ExecuteSwitchStretchCommand()
{
switch (Stretch)
{
case SKStretch.None:
Stretch = SKStretch.Fill;
break;
case SKStretch.Fill:
Stretch = SKStretch.Uniform;
break;
case SKStretch.Uniform:
Stretch = SKStretch.UniformToFill;
break;
case SKStretch.UniformToFill:
Stretch = SKStretch.None;
break;
}
}
