public ResizedImageInfo Resize(DpiPath dpi, string destination)
{
var sw = new Stopwatch();
sw.Start();
var(bgScaledSize, bgScale) = backgroundTools.GetScaledSize(backgroundOriginalSize, dpi);
// Allocate
using (var tempBitmap = new SKBitmap(bgScaledSize.Width, bgScaledSize.Height))
{
// Draw (copy)
using (var canvas = new SKCanvas(tempBitmap))
{
canvas.Clear(SKColors.Transparent);
canvas.Save();
canvas.Scale(bgScale, bgScale);
backgroundTools.DrawUnscaled(canvas);
canvas.Restore();
if (hasForeground)
{
var userFgScale = (float)Info.ForegroundScale;
// get the ratio to make the foreground fill the background
var fitRatio = bgScaledSize.Width / foregroundOriginalSize.Width;
// calculate the scale for the foreground to fit the background exactly
var(fgScaledSize, fgScale) = foregroundTools.GetScaledSize(foregroundOriginalSize, (decimal)fitRatio);
Logger.Log("dpi.Size: " + dpi.Size);
Logger.Log("dpi.Scale: " + dpi.Scale);
Logger.Log("bgScaledSize: " + bgScaledSize);
Logger.Log("bgScale: " + bgScale);
Logger.Log("foregroundOriginalSize: " + foregroundOriginalSize);
Logger.Log("fgScaledSize: " + fgScaledSize);
Logger.Log("fgScale: " + fgScale);
Logger.Log("userFgScale: " + userFgScale);
// now work out the center as if the canvas was exactly the same size as the foreground
var fgScaledSizeCenterX = foregroundOriginalSize.Width / 2;
var fgScaledSizeCenterY = foregroundOriginalSize.Height / 2;
Logger.Log("fgScaledSizeCenterX: " + fgScaledSizeCenterX);
Logger.Log("fgScaledSizeCenterY: " + fgScaledSizeCenterY);
// scale so the forground is the same size as the background
canvas.Scale(fgScale, fgScale);
// scale to the user scale, centering
canvas.Scale(userFgScale, userFgScale, fgScaledSizeCenterX, fgScaledSizeCenterY);
foregroundTools.DrawUnscaled(canvas);
}
}
// Save (encode)
using (var pixmap = tempBitmap.PeekPixels())
using (var wrapper = new SKFileWStream(destination))
{
pixmap.Encode(wrapper, SKPngEncoderOptions.Default);
}
}
sw.Stop();
Logger?.Log($"Save Image took {sw.ElapsedMilliseconds}ms");
return(new ResizedImageInfo {
Dpi = dpi, Filename = destination
});
}